CN217528912U - Reaming mechanism and automatic reaming tool - Google Patents

Abstract

The utility model discloses a reaming mechanism and automatic reaming instrument use at riveting nut mounting tool technical field, and its technical scheme main points are: a hole expanding mechanism comprises an installation gun seat, wherein a gun head seat is fixedly connected to one end, close to a gun head, of the installation gun seat; the end, far away from the gun tail, of the gun head seat is coaxially provided with a pull head used for expanding a circular hole in an installation plate into a regular polygonal hole, the end, far away from the gun head, of the pull head is provided with a clamping mechanism used for driving the pull head to reciprocate along the axial line direction of the gun head seat, a push rod which is coaxially arranged with the pull head and penetrates into the pull head is arranged in the clamping mechanism and used for butting the pull head to realize fixed clamping of the circular hole, a first elastic piece used for helping the push rod to return to an initial position is arranged at the position, close to the pull head, of the push rod, and an elastic push rod seat used for pushing the push rod to reset is fixedly connected to one end, far away from the gun tail, of the installation gun head seat; has the technical effects that: simple structure and convenient operation.

Description

Reaming mechanism and automatic reaming tool

Technical Field

The utility model relates to a riveting nut mounting tool technical field, in particular to reaming mechanism and automatic reaming instrument.

Background

In application, the rivet nut with the hexagonal appearance can meet the requirement of a customer on installation of a large-torque bolt, and before the rivet nut with the hexagonal appearance is installed on a plate, a hexagonal inner hole is machined in the plate, and machining processes such as drilling, cutting and stamping are roughly arranged in the machining hole, but the machining processes are limited and cannot be applied to various occasions. For example, a drilling process can only process a circular hole, and two processing processes, namely cutting and stamping, can also process a non-circular hole on the basis of processing the circular hole, but the processing processes such as stamping all require specific equipment and dies, are high in use cost, and are not suitable for the use requirement of processing the circular hole into a regular hexagon mounting hole required by a rivet nut in a small-scale use scene, and in addition, if a non-circular hole needs to be newly added on the assembled equipment, the use of modes such as stamping and cutting is difficult to achieve.

At present, the china utility model of bulletin number CN207982421U discloses an operating means that is used for rechargeable lithium cell rivet rifle round hole to change hexagonal hole, change the hexagonal hole operation end including transmission shaft and the round hole that links to each other with the transmission shaft, the transmission shaft links to each other with rechargeable lithium cell rivet rifle output, the round hole changes the outside that hexagonal hole operation end is located the transmission shaft, the end of transmission shaft sets up the hand lever, change the outside setting of hexagonal hole operation end at the round hole and be used for fastening the screw cap seat and the screw cap of each part, still set up the power supply simultaneously, including the reducing gear box, secondary gear and motor, the output of reducing gear box links to each other with the transmission shaft, the input of reducing gear box links to each other with secondary gear's output, the output of motor links to each other with secondary gear's input.

Present utility model is based on fixed power supply and drive mechanism, it is the same with the reversal riveting driving force to move back to draw the riveting pulling force through the corotation that the power supply produced, it uses the not enough and produce of the strength that resets that the structure that the spring resets caused to have overcome current pneumatics and hydraulic tool moves back and rivets not in proper order smooth shortcoming, however, the utility model discloses when the round hole changes the hexagonal hole operation, circular hole on the mounting panel is adorned the machine after, must promote the hand pull handle forward and make the ejector pin get into behind the pull head hole, just can carry out the reaming operation, thereby need manual promotion to set up when moving back the riveting process after the reaming is accomplished and promote conveying axial rearward movement at the terminal hand pull handle of conveying axle, accomplish and move back the riveting process, the troublesome operation, the work efficiency is low, improved space has.

SUMMERY OF THE UTILITY MODEL

The first object of the present invention is to provide a hole expanding mechanism, which is simple and convenient to operate.

The above technical purpose of the present invention can be achieved by the following technical solutions: a hole expanding mechanism comprises an installation gun seat, wherein one end of the installation gun seat, which is close to a gun head, is fixedly connected with a gun head seat internally provided with a hollow stepped shaft; the mounting gun seat is characterized in that a pull head used for expanding a circular hole in a mounting plate into a regular polygon rivet nut hole is arranged at one end, far away from the gun tail, of the gun head seat and is provided with a clamping mechanism used for driving the pull head to reciprocate along the axial line direction of the gun head seat, a push rod which is coaxially arranged with the pull head and penetrates into the pull head and is used for abutting against the pull head to fix the clamping circular hole is arranged at one end, far away from the gun tail, of the pull head, a first elastic piece used for helping the push rod to return to an initial position is arranged at the position, close to the pull head, of the push rod, and the mounting gun seat is fixedly connected with one end, far away from the gun head, of the push rod and abuts against the end face of the end, far away from the gun head, of the push rod and is used for pushing the elastic push rod seat for resetting.

Through the technical scheme, the gun seat is fixedly connected with the ejector rod at one end of the gun tail, the gun seat is in coaxial connection with the ejector rod and abuts against the elastic ejector rod seat far away from the end face of the gun head on the ejector rod, and the first elastic piece is arranged at the position, close to the gun head, on the ejector rod.

The utility model discloses further set up to: the pull head is formed along the even interval combination of circumferencial direction by a plurality of fan-shaped prisms, be equipped with in the fan-shaped prism and be used for supplying the top contact hole that the ejector pin passed, the pull head including the protrusion set up in rifle headstock terminal surface for fill in set up the circular hole on the mounting panel in, be used for expand the round hole regular polygon and rivet the reaming portion in nut hole and set up in inside the rifle headstock, and based on joint mode fixed connection in joint portion on the clamping mechanism.

Through the technical scheme, the pull head is formed by the even interval combination of a plurality of fan-shaped prisms along the circumferencial direction and set up the top connection hole in fan-shaped prism, thereby make the pull head can compress to a certain extent or open, when needs insert the round hole on the pull head, compress fan-shaped prism can fill in the pull head with the mounting panel of taking the round hole easily in, when carrying out reaming operation, the ejector pin inserts in the top connection hole, then fan-shaped prism just can't accomplish the compression, thereby guarantee that the mounting panel of taking the round hole can not deviate from the pull head, moreover, the steam generator is simple in structure, the reaming is effectual, the reaming portion protrusion rifle head seat terminal surface of pull head, a reaming process is stably connected on the pull head and is accomplished smoothly to the mounting panel of taking the round hole, the joint portion that sets up inside rifle head seat is used for realizing driving the translation movement in rifle head seat axis direction on the clamping mechanism based on clamping mode fixed connection.

The utility model discloses further set up to: reaming portion is including setting up in keeping away from rifle head seat butt end face for realize conveniently filling in the downthehole toper portion of circular and the next-door neighbour set up in toper portion for the butt groove of joint mounting panel, joint portion keeps away from the one end of reaming portion is equipped with joint fixed connection in joint ring on the clamping mechanism.

Through the technical scheme, the one end of keeping away from rifle head seat butt end face in reaming portion sets up toper portion and sets up the butt groove in the position of next-door neighbour toper portion, can guarantee like this that the round hole is also can guarantee when making the round hole fill in reaming portion more easily that the round hole is filled in the butt inslot and can not deviate from the butt inslot, only can break away from after the reaming is accomplished, the joint ring is set up to the one end of keeping away from reaming portion in joint portion, thereby make the joint that the pull head can be more stable on clamping mechanism, also can guarantee simultaneously that clamping mechanism can not appear rocking etc. when driving the pull head and being translational motion, guarantee that the reaming process is more stable.

The utility model discloses further set up to: the clamping mechanism comprises a hollow screw rod shaft which is coaxially arranged with the gun head seat and capable of performing reciprocating translation along the axis direction of the gun head seat, one end, close to the pull head, of the hollow screw rod shaft is fixedly connected with a jacking piece which is used for jacking and connecting one end face, far away from the gun head, of the clamping ring so as to drive the pull head to recover, and a pulling and connecting piece which is used for pulling and connecting one end face, close to the gun head, of the clamping ring so as to pull the pull head to realize hole expansion is fixedly connected onto the jacking piece.

Through the technical scheme, the top connection piece fixedly connected to one end, close to the pull head, of the hollow screw rod shaft is used for jacking the clamping ring to keep away from one end face of the gun head, so that in the return process of the ejector rod, the elastic ejector rod seat can drive the top connection piece to translate towards the direction of the gun head while jacking the ejector rod, the one end fixedly connected to the top connection piece, close to the gun head, of the clamping ring is close to the tie piece of one end face of the gun head, the top connection piece is driven to indirectly drive the pulling piece to translate towards the direction of the gun tail when the hollow screw rod shaft translates towards the direction of the gun tail, the pulling piece is close to the clamping ring to be close to one end face of the gun head, and therefore the pull head is driven to stably translate towards the direction of the gun tail to expand a hole.

The utility model discloses further set up to: the hollow screw rod is characterized in that a plurality of clamping grooves are formed in the ejector rod at intervals, blocking gaskets are sleeved and connected in the clamping grooves, guide shaft sleeves sleeved on the ejector rod are arranged between the blocking gaskets, and the guide shaft sleeves are attached to the wall of a guide hole in the hollow screw rod shaft and are connected in the guide hole in the hollow screw rod shaft in a sliding mode along the direction of the axis of the guide hole.

Through the technical scheme, the plurality of clamping grooves are formed in the ejector rod at intervals, the clamping grooves are sleeved with the connecting blocking gaskets, the guide shaft sleeve sleeved on the ejector rod is arranged between the gaskets, the guide shaft sleeve is attached to the wall of the guide hole, when the ejector rod moves in the guide hole in the hollow screw rod shaft, the guide shaft sleeve can enable the ejector rod to move horizontally along the axial lead direction of the hollow screw rod shaft all the time, so that the linear motion of the ejector rod in the guide hole in the hollow screw rod shaft is more stable and reliable, and the reaming precision is improved.

The utility model discloses further set up to: the first elastic piece is arranged between the guide shaft sleeve close to the jacking piece and the jacking piece.

Through above-mentioned technical scheme, set up first elastic component between the guide shaft sleeve and the butt joint piece that are close to the butt joint piece, be convenient for like this on the one hand install first elastic component on the ejector pin, on the other hand, when the pull head removed to the rifle tail direction, thereby the pull head drove the butt joint piece and removes the first elastic component of direct compression to make the ejector pin direct motion accomplish the fixed to the round hole in the butt joint hole of pull head inside, make the riveting process rapider.

The utility model discloses further set up to: the elasticity ejector pin seat include fixed connection in the ejector pin base and the sliding connection of installation gun seat guntail position in guntail one end is kept away from to the ejector pin base, are used for the butt the fore-set of ejector pin terminal surface, be equipped with in the ejector pin base connect in the fore-set is used for promoting thereby the fore-set removes to keeping away from guntail direction and promotes the second elastic component that the ejector pin replied.

Through above-mentioned technical scheme, the fore-set sliding connection on the elasticity fore-set base is kept away from the one end and the butt of rifle tail at the ejector pin terminal surface at the ejector pin base to set up the second elastic component of connection on the fore-set in the ejector pin base, when the pull head was to the translation of rifle tail direction, the ejector pin can promote the fore-set compression second elastic component, thereby when the reaming completion replied the process, second elastic component release elasticity promoted the ejector pin and replied initial position, has avoided artifical needs manual reset.

The utility model discloses further set up to: and one end of the ejector rod base, which is close to the gun tail, is connected with a spring seat for adjusting the elastic force of the second elastic piece based on threads.

Through above-mentioned technical scheme, be close to the one end base threaded connection spring holder of rifle tail at the ejector pin base, when the position of rotating the spring holder adjustment spring holder in the ejector pin base, alright in order to realize adjusting the elasticity of second elastic component to make the process that the ejector pin replied more stable quick.

The utility model discloses further set up to: the elastic force of the second elastic member is greater than the elastic force of the first elastic member.

Through the technical scheme, the elasticity that sets up the second elastic component is greater than the elasticity of first elastic component, when reaming, clamping mechanism drives the pull head to the translation of rifle tail direction, this moment because the elasticity of second elastic component is greater than the elasticity of first elastic component, then first elastic component is at first compressed, thereby the ejector pin gets into the downthehole realization of apical grafting and fixes the round hole, just can compress the second elastic component afterwards, when the reaming completion need move back the riveting, because the elasticity of second elastic component is greater than the elasticity of first elastic component, then the second elastic component can at first reply and drive the ejector pin and reply initial position, first elastic component replies afterwards and makes the ejector pin follow the pull head retraction and reply initial position.

The second object of the utility model is to provide an automatic reaming instrument, its advantage is easy operation is convenient.

The above technical purpose of the present invention can be achieved by the following technical solutions: an automatic reaming tool comprising a reaming mechanism according to any one of the preceding claims; the mounting gun head is characterized by further comprising a feed screw nut seat fixedly connected to the mounting base and a feed screw nut rotatably connected to the feed screw nut seat and used for converting rotary motion into translation of the hollow feed screw shaft along the axis of the gun head seat, and the mounting gun seat is fixedly connected to a power mechanism used for driving the feed screw nut to rotate.

According to the technical scheme, the power mechanism and the feed screw nut seat are fixedly connected to the gun mounting seat, the feed screw nut is rotationally connected to the feed screw nut seat, the power mechanism drives the feed screw nut to rotate so as to drive the hollow screw rod shaft matched with the feed screw nut to translate, and the feed screw nut is used for converting the rotary motion into the translational motion of the hollow screw rod shaft along the axis line direction of the gun mounting seat, so that the translation process is more stable, and the hole expanding precision is improved.

To sum up, the utility model discloses following beneficial effect has:

1. when the broaching step is carried out, the puller moves backwards, and due to the elastic action of the elastic ejector rod seat, the elastic ejector rod seat can push the ejector rod to move towards the gun head to enter the inner hole of the puller, so that the manual step of manually pushing the ejector rod to the inner hole of the puller is avoided, and the broaching process is simple and easy to operate.

2. When the circular hole is expanded into a regular polygonal hole by the puller for the rivet removing step, the elastic ejector rod base can push the ejector rod to move towards the gun head to return to the initial position due to the elastic action of the elastic ejector rod base, and when the ejector rod returns to the initial position, the first elastic piece arranged on the ejector rod can push the ejector rod to move towards the gun tail so as to enable the ejector rod to retract from the puller and drive the ejector rod to return to the initial position due to the fact that the first elastic piece arranged on the ejector rod is compressed, and therefore the process that the ejector rod needs to be manually pulled to return to the initial position is avoided, and the hole expanding process is simpler and more convenient;

3. be close to the one end base threaded connection spring holder of rifle tail at the ejector pin base, when the position of rotary spring seat adjustment spring holder in the ejector pin base, alright in order to realize the elasticity of adjustment second elastic component, the elasticity that sets up the second elastic component simultaneously is greater than the elasticity of first elastic component, when the reaming completion needs move back and rivet, because the elasticity of second elastic component is greater than the elasticity of first elastic component, then the second elastic component can at first reply and drive the ejector pin and reply initial position, first elastic component replies afterwards and makes the ejector pin follow the pull head internal contraction and reply initial position, moreover, the steam generator is simple in structure, need not artifical manual operation alright realize easily moving back the riveting process.

Drawings

FIG. 1 is a schematic view of the overall structure of the present embodiment;

FIG. 2 is a half sectional view showing the entire structure of the present embodiment;

FIG. 3 is a schematic structural view of the slider of the present embodiment;

FIG. 4 is a schematic structural view of the jack of the present embodiment;

FIG. 5 is a schematic view showing a half-sectional structure of the elastic jack stand according to the present embodiment;

FIG. 6 is a schematic view of the quick change mechanism of the present embodiment;

fig. 7 is a schematic half-sectional view of the quick-change mechanism of the present embodiment.

Reference numerals are as follows: 1. mounting a gun seat; 2. a gun head seat; 3. a slider; 31. a fan-shaped prism; 32. butting holes; 33. a reaming section; 331. a tapered portion; 332. a butt joint groove; 34. a clamping part; 341. a snap ring; 35. a movable groove; 4. a clamping mechanism; 41. a hollow screw shaft; 42. a jacking member; 43. pulling the connecting piece; 5. a top rod; 51. a clamping groove; 52. a barrier gasket; 53. a guide shaft sleeve; 54. a first elastic member; 6. an elastic ejector rod seat; 61. a mandril base; 62. a top pillar; 63. a second elastic member; 64. a spring seat; 7. a screw nut seat; 71. a feed screw nut; 8. a power mechanism; 81. a power motor; 82. a first drive gear; 83. a drive shaft; 84. a second transmission gear; 85. a third transmission gear; 9. a quick replacement mechanism; 91. a jack rod sleeve; 92. an elastic locking button; 93. pulling and connecting the sleeve; 94. a groove; 95. and (4) a boss.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

Example 1:

referring to fig. 1 and 2, the hole expanding mechanism comprises a mounting gun seat 1, a gun head seat 2 is fixedly connected to the mounting gun seat 1 close to the gun head on the basis of threads, and a hollow stepped shaft is arranged in the gun head seat 2. The one end of keeping away from the rifle tail at rifle head seat 2 is provided with the pull head 3 that is used for expanding the circular port on the mounting panel into the required regular polygon hole of rivet nut with the axle center, the one end fixed connection that is used for the fixed pull head 3 of joint and drives pull head 3 and make reciprocating translation motion along rifle head seat 2 axial lead direction at the 3 one end of rifle head of pull head simultaneously, be equipped with in clamping mechanism 4 with the coincidence of 3 axial leads of pull head, thereby realize top grafting pull head 3 in penetrating pull head 3 and realize carrying out the ejector pin 5 that the joint is fixed to the circular port, the one end that is close to the rifle tail at installation rifle seat 1 simultaneously is based on joint groove 51 joint fixedly connected with and the coincidence of 5 axial leads of ejector pin and one end butt keep away from rifle head one end face at ejector pin 5, an elasticity ejector pin seat 6 for replacing manual reset and realizing ejector pin 5 automatic re-setting.

Referring to fig. 3, specifically, the slider 3 is formed by the combination of a plurality of fan-shaped prisms 31 along the even interval of circumferencial direction, movable groove 35 has been seted up at the equal interval between each fan-shaped prism 31, set up the top connection hole 32 that is used for supplying ejector pin 5 to pass in fan-shaped prism 31, the top connection hole 32 is the notch cuttype structure, the aperture that the position of top connection hole 32 far away from installation gun base 1 is less than the aperture of keeping away from near installation gun base 1 position, do the chamfer setting in the position that top connection hole 32 aperture changes, thereby guarantee that ejector pin 5 can steadily and smoothly wear to realize the top connection to slider 3 in the less top connection hole 32 of aperture. Meanwhile, in an initial state, part of the pull head 3 protrudes out of the end surface of the gun head seat 2, the rest part of the pull head 3 is arranged inside the gun head seat 2, the part of the pull head 3 protruding out of the end surface of the gun head seat 2 is an expanding hole part 33 which is used for being plugged into a circular hole formed in the mounting plate and expanding the circular hole into a regular polygon rivet nut hole required by a rivet nut, and the part of the pull head 3 arranged inside the gun head seat 2 is a clamping part 34 which is used for being clamped on the clamping mechanism 4 and moving in a translation mode along the axial lead direction of the pull head 3 along with the clamping mechanism 4.

Referring to fig. 2 and 3, specifically, the reamer part 33 includes a tapered part 331 that is disposed far away from the butt end face of the gun head seat 2, and is configured to facilitate plugging of a circular hole into the reamer part 33 and close proximity of the tapered part 331, an abutting groove 332 for realizing engagement with the circular hole on the mounting plate, a corner position of the tapered part 331 is rounded, when the circular hole is expanded into an regular polygonal hole, first the tapered part 331 is compressed to make the circular hole enter the abutting groove 332 from the tapered part 331, and then the tapered part 331 is released, the circular hole is engaged in the abutting groove 332 but still movable, when the ejector pin 5 penetrates into the abutting hole 32 where the tapered part 331 is located, at this time, the tapered part 331 cannot be compressed, then the circular hole is engaged in the abutting groove 51, and the abutting groove 332, when the slider 3 is driven by the engagement mechanism 4 to translate toward the gun tail direction, the reamer part 33 drives the mounting plate to translate and move simultaneously until one face of the mounting plate abuts against a groove face of the abutting groove 332 close to a groove face of one end of the tapered part 332, and the other face of the mounting plate is abutted to the end face of the regular polygonal hole of the mounting plate 331, and the gun head seat 2, and the mounting plate is fixed, and the mounting plate 33 continues to translate toward the gun tail direction, thereby the regular polygonal hole is pulled out of the corner of the tapered part 331 on the corner of the tapered hole. Specifically, a clamping ring 341 is disposed at one end of the clamping portion 34 away from the reaming portion 33 for being clamped and fixed on the clamping mechanism 4. In this embodiment, the number of the fan-shaped prisms 31 is not less than 2, and the regular polygonal hole formed by expanding the circular hole is not limited to the regular hexagonal hole required by the rivet nut, and the circular hole can be drawn into a regular quadrangle, and any side of any polygon such as a regular octagon can be tangent to the same inner circle at the same time.

Referring to fig. 2, specifically, the clamping mechanism 4 includes a hollow screw shaft 41 which is disposed in a manner of being overlapped with the axial lead of the gun head seat 2 and performs reciprocating translational motion along the axial lead, a sliding shaft for guiding is disposed at one end of the hollow screw shaft 41 close to the gun tail, and the sliding shaft is slidably connected to a sliding chute disposed on the gun mounting seat 1, so as to improve the linearity of the translational motion of the hollow screw shaft 41. A through guide hole is formed in the hollow screw rod shaft 41 along the axial lead direction, one end, close to the pull head 3, of the hollow screw rod shaft 41 is fixedly connected with a jacking piece 42 used for jacking a clamping ring 341 and far away from the end face of the gun head, so that the pull head 3 is driven to translate towards the gun head direction to realize rivet withdrawal and return, the jacking piece 42 is fixedly connected with a pulling piece 43 used for pulling the clamping ring 341 and close to the end face of the gun head, so that the pull head 3 is pulled to translate towards the gun tail direction to realize reaming, the width of the clamping ring 341 arranged at the tail part of the pull head is the same as the width between the jacking piece 42 and the pulling piece 43, and the time delay in the reaming or rivet withdrawal process is avoided. In this embodiment, the pulling element 43 is fixedly connected to the pulling element 42 based on a threaded fastening manner, the pulling element 42 is fixedly connected to the hollow screw shaft 41 based on a clamping manner, but not limited to using this fixing manner, a quick replacement mechanism 9 as shown in fig. 6 to 7 can also be used to realize clamping fixation of the pulling head 3, the quick replacement mechanism includes a pushing sleeve having the same function as that of the pushing element 42, the pushing sleeve is sleeved with an elastic locking button 92, and a pulling sleeve 93 having the same function as that of the pulling element 43 in this embodiment is sleeved on an end of the pushing sleeve close to the pulling head 3, the pulling sleeve 93 is internally provided with a tapered pulling surface for abutting against one end surface of the clamping ring 341 close to the gun head to realize translational movement of the pulling head 3 toward the gun tail direction, meanwhile, one end surface of the pushing sleeve close to the pulling sleeve 93 abuts against the other end surface of the clamping ring 341 to realize riveting, so as to drive the pulling head 3 to move toward the gun head, meanwhile, one end of the pulling sleeve 93 far away from the gun tail is uniformly provided with a plurality of grooves 94 at intervals, a contact position of the elastic locking button 92 with the pulling sleeve 93 is provided with a replacement groove 94, so as the elastic locking button 92 can be matched with a boss 95 of the elastic locking sleeve 95, thereby realizing quick replacement of the quick replacement spring when the pulling sleeve 95 can be matched with the boss 95 of the pulling rod shaft 41, so as required.

Refer to fig. 2 and 4, specifically, ejector pin 5 is rectangular columnar structure, a plurality of joint grooves 51 have been seted up on ejector pin 5, joint inslot 51 is seted up and is had the packing ring 52 that blocks that does not surround, also can realize quick replacement's purpose when realizing blocking, the position that ejector pin 5 is close to the rifle tail is equipped with a pair of joint groove 51, a section distance in interval between joint groove 51, be equipped with the guide shaft cover 53 of establishing on ejector pin 5 between blockking the packing ring 52, guide shaft cover 53 hugs closely and establishes on the guiding hole pore wall in hollow screw rod axle 41 and along guiding hole axial lead direction sliding connection in the guiding hole, thereby guide shaft cover 53 can make ejector pin 5 always along the axial lead direction translation of hollow screw rod axle 41, thereby make ejector pin 5 more stable and reliable in the inside linear motion of guiding hole of hollow screw rod axle 41, promote the reaming precision. Meanwhile, the position of the push rod 5 close to the abutting piece 42 is also provided with a clamping groove 51, a blocking gasket 52 is arranged in the clamping groove 51, a guide shaft sleeve 53 is arranged between the blocking gasket 52 and the abutting piece 42, and a first elastic piece 54 for helping the push rod 5 to return to the initial position is arranged between the guide shaft sleeve 53 and the abutting piece 42.

Referring to fig. 2 and 5, specifically, the elastic ejector rod base 6 includes an ejector rod base 61 fixedly connected to the gun tail of the installation gun base 1 in a clamping manner and an ejector rod 62 slidably connected to the end of the ejector rod base 61 away from the gun tail and used for abutting against the end surface of the ejector rod 5, and the end surface of the ejector rod 62 contacting with the ejector rod 5 is provided with an ejector slot for accommodating the ejector rod 5, so that the ejector rod 62 is prevented from being separated from the ejector rod 5. Set up the ladder groove that link up in ejector pin base 61, seted up on the fore-set 62 with ladder groove complex ladder piece, be used for playing limiting displacement to the fore-set 62, spring holder 64 is located based on threaded connection's mode in the one end that the ejector pin base 61 is close to the rifle tail simultaneously, spring holder 64 is hexagon socket head cap screw, be equipped with between spring holder 64 and fore-set 62 and be used for promoting fore-set 62 towards keeping away from rifle tail direction removal from and promote the second elastic component 63 that ejector pin 5 replied, when adjusting the position in spring holder 64 screw in ejector pin base 61, second elastic component 63 just can be pressed and stretched, thereby be used for adjusting the elasticity size of second elastic component 63, thereby can realize adjusting the return speed etc. of ejector pin 5. In this embodiment, the elastic force of the second elastic member 63 is much greater than the elastic force of the first elastic member 54, so as to ensure that the first elastic member 54 is firstly compressed when reaming is performed, so that the top rod 5 enters the top hole 32 to fix the circular hole, and then the second elastic member 63 is compressed, when the reaming is completed and riveting needs to be performed, because the elastic force of the second elastic member 63 is greater than the elastic force of the first elastic member 54, the second elastic member 63 can firstly recover to drive the top rod 5 to recover the initial position, and then the first elastic member 54 recovers to enable the top rod 5 to retract from the slider 3 and recover to the initial position. Meanwhile, springs are used for the first elastic member 54 and the second elastic member 63.

Example 2:

referring to fig. 1 and 2, an automatic hole expanding tool includes a hole expanding mechanism as shown in embodiment 1, and also includes a lead screw nut seat 7 fixedly connected to a mounting base, and a lead screw nut 71 rotatably connected to the lead screw nut seat 7 and engaged with a hollow lead screw shaft 41, and a power mechanism 8 for driving the lead screw nut 71 to rotate is fixedly connected to the mounting gun seat 1.

Specifically, the outer wall of the hollow screw shaft 41 is provided with an external thread, and the axis of the screw nut 71 is provided with an internal thread matched with the external thread, so that when the power assembly drives the screw nut 71 to rotate, the screw nut 71 converts the rotation motion into the translation motion of the hollow screw shaft 41 along the axis direction of the gun head seat 2 based on the thread engagement, and the pull head 3 is driven to do the telescopic motion.

Referring to fig. 1 and fig. 2, in detail, the power mechanism 8 includes a power motor 81 fixedly connected to the mounting base and a transmission shaft 83 rotatably connected to the mounting base, a first transmission gear 82 is fixedly connected to an output shaft of the power motor 81, a second transmission gear 84 engaged with the first transmission gear 82 is fixedly connected to one end of the transmission shaft 83 close to the first transmission gear, the second transmission gear 84 has a gear diameter larger than that of the first transmission gear 82, so as to increase an output torque of the power motor 81, a third transmission gear 85 matched with the lead screw nut 71 and used for driving the lead screw nut 71 to rotate is arranged at one end of the transmission shaft 83 far from the second transmission gear 84, and the gear diameter of the lead screw nut 71 is larger than that of the third transmission gear 85. In the present embodiment, the power motor 81 is a brushless motor, but is not limited to a brushless motor, and a stepping motor, a servo motor, a brush motor, or the like that can provide forward and reverse rotation may be used. Meanwhile, the reaming mechanism is not limited to be installed in the reaming gun seat in the embodiment, and meanwhile, the reaming mechanism can be applied to automatic factory equipment to be applied to a use scene needing large-scale reaming.

Brief description of the use process: firstly, a tapered portion 331 arranged on the slider 3 is plugged into a pre-hole of a broaching workpiece, then the workpiece enters into an abutting groove 332 arranged on the slider 3, then the power motor 81 is operated to rotate to drive the transmission shaft 83 to rotate, so as to drive the screw nut 71 to rotate, the rotation motion of the screw nut 71 is converted into the translation motion of the hollow screw shaft 41 towards the gun tail direction along the axial line direction of the hollow screw shaft 41, so as to drive the pull piece 43 fixedly connected to the hollow screw shaft 41 to drive the clamping ring 341 arranged at the tail end of the slider 3 to drive the slider 3 to translate and retract towards the gun tail direction, at the moment, the first elastic piece 54 is compressed, as the slider 3 initially moves towards the gun tail direction relative to the pull rod, the pull rod enters into the abutting hole 32 inside the slider 3, so that the fan-shaped prism 31 cannot be compressed, so as to realize the clamping on a circular hole on the workpiece, then, as the power motor 81 continues to drive the hollow screw shaft 41 to move towards the gun tail direction, at the moment, the end surface of the workpiece abuts against the end surface of the gun head seat 2, at the top end 33 arranged on the slider 3, a hole expanding portion 33 can expand a regular polygon, and the broaching hole, at the top hole, at the same time, and the gun tail elastic piece 5, so as the top rod can compress the ejector rod 6.

After reaming is finished, the power motor 81 automatically rotates reversely to drive the hollow screw shaft 41 to translate towards the direction of the gun head, the second elastic piece 63 with larger elasticity arranged inside the elastic ejector rod seat 6 can push the ejector column 62 to push the ejector rod 5 to reset towards the direction of the gun head, when the ejector rod 5 returns to the original position, the first elastic piece 54 arranged on the ejector rod 5 releases the elasticity, so that the ejector rod 5 is pushed to reset towards the direction of the gun tail to be separated from the jacking hole 32 arranged on the puller 3, the ejector rod 5 returns to the original position, and reaming operation is sequentially and circularly carried out.

The present embodiment is only for explaining the present invention, and it is not limited to the present invention, and those skilled in the art can make modifications of the present embodiment with inventive contribution as required after reading the present specification, but all of them are protected by patent law within the scope of the claims of the present invention.

Claims (10)

1. A hole expanding mechanism comprises a mounting gun seat (1), wherein one end, close to a gun head, of the mounting gun seat (1) is fixedly connected with a gun head seat (2) with a hollow stepped shaft arranged inside; the mounting gun seat is characterized in that a pull head (3) used for expanding a circular hole in a mounting plate into a regular polygon rivet nut hole is arranged at one end, far away from a gun tail, of the gun head seat (2) and coaxially, a clamping mechanism (4) used for driving the pull head (3) to reciprocate along the axial lead direction of the gun head seat (2) is arranged at one end, far away from the gun head, of the pull head (3), a push rod (5) used for enabling the pull head (3) to fixedly clamp the circular hole is arranged in the clamping mechanism (4), a first elastic piece (54) used for helping the push rod (5) to return to an initial position is arranged at a position, close to the pull head (3), of the mounting gun seat (1) at one end of the gun tail, is fixedly connected with the push rod (5) and is coaxially abutted to an end face, far away from one end of the gun head, of the push rod (5), and an elastic push rod seat (6) used for resetting the push rod (5).

2. A hole expanding mechanism according to claim 1, wherein the pull head (3) is formed by combining a plurality of fan-shaped prisms (31) at uniform intervals along the circumferential direction, a top connection hole (32) for the ejector rod (5) to pass through is arranged in each fan-shaped prism (31), the pull head (3) comprises a protrusion arranged on the end surface of the headstock (2), a hole expanding part (33) for expanding a circular hole into a regular polygonal rivet nut hole and a clamping part (34) arranged inside the headstock (2), and the clamping part is fixedly connected to the clamping mechanism (4) based on a clamping manner.

3. A hole reaming mechanism according to claim 2, characterized in that the hole reaming portion (33) comprises a tapered portion (331) arranged far away from the butt end face of the tool bit holder (2) for facilitating insertion into the circular hole and a butt groove (332) arranged close to the tapered portion (331) for clamping the mounting plate, wherein one end of the clamping portion (34) far away from the hole reaming portion (33) is provided with a clamping ring (341) for clamping and fixedly connecting to the clamping mechanism (4).

4. A broaching mechanism according to claim 3, wherein the clamping mechanism (4) comprises a hollow screw shaft (41) which is coaxially arranged with the tool head seat (2) and reciprocally translates along the axial direction of the tool head seat (2), one end of the hollow screw shaft (41) close to the puller (3) is fixedly connected with a butting piece (42) for butting against the end face of the clamping ring (341) far away from the end face of the puller head so as to drive the puller (3) to return, and the butting piece (43) is fixedly connected with the butting piece (42) for butting against the end face of the clamping ring (341) close to the end face of the puller head so as to pull the puller (3) to realize broaching.

5. The reaming mechanism according to claim 4, wherein the mandrel (5) is provided with a plurality of clamping grooves (51) at intervals, the clamping grooves (51) are connected with blocking washers (52) in a sleeved mode, a guide shaft sleeve (53) sleeved on the mandrel (5) is arranged between the blocking washers (52), and the guide shaft sleeve (53) is attached to the wall of the guide hole in the hollow mandrel shaft (41) and is connected to the guide hole in the hollow mandrel shaft (41) in a sliding mode along the axial direction of the guide hole.

6. A reamer mechanism according to claim 5, wherein the first resilient element (54) is provided between the guide sleeve (53) adjacent the abutment (42) and the abutment (42).

7. A hole reaming mechanism according to claim 1, characterized in that the elastic ejector rod seat (6) comprises an ejector rod base (61) fixedly connected to the breech position of the installation gun seat (1) and an ejector rod (62) slidably connected to the end of the ejector rod base (61) far away from the breech for abutting against the end surface of the ejector rod (5), and a second elastic member (63) connected to the ejector rod (62) is provided in the ejector rod base (61) for pushing the ejector rod (62) to move towards the direction far away from the breech so as to push the ejector rod (5) to return.

8. A reamer mechanism according to claim 7, wherein a spring seat (64) for adjusting the spring force of the second elastic member (63) is screwed to an end of the ram base (61) near the gun tail.

9. A reamer mechanism according to claim 7, wherein the spring force of the second spring element (63) is greater than the spring force of the first spring element (54).

10. An automated reaming tool comprising a reaming mechanism according to any one of claims 1 to 9; its characterized in that, reaming mechanism still include fixed connection in lead screw nut seat (7) on installation gun seat (1) and with lead screw nut (71) of lead screw nut seat (7) swivelling joint, it is used for driving still fixedly connected with on installation gun seat (1) the rotatory power unit (8) of lead screw nut (71), power unit (8) drive lead screw nut (71) are used for changing rotary motion into clamping mechanism (4) along the translation of gun head seat (2) axial lead direction.

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