TWI716257B - Shaft locking device - Google Patents

Abstract

The present invention provides a shaft locking device, which includes a control member, a moving member, an elastic member, and a stopping member. The moving member has a contacting portion and a first abutting surface, and the position of the contacting portion corresponds to a guiding portion of the control member. The elastic member pushes the moving member to abut against the control member. The stopping member which has a second abutting surface is configured on the shaft. The moving member is able to move back and forth along an axis. When the control member rotates toward a lock-position, the guiding portion guides the moving member to move along the axis, leading the first abutting surface of the moving member abuts against the second abutting surface of the stopping member to limit the rotation of the shaft. Therefore, the user can lock the shaft of the power tool only by rotating the control member, making the shaft locking device has the advantage of convenience.

Description

Shaft locking device

This creation is about a rotating shaft locking device, especially a rotating shaft locking device used to lock the rotating shaft of a power tool.

Pneumatic or electric power tools install processing tools (such as grinding discs, grinding wheels or polishing discs, etc.) on the rotating shaft of the power tool. When the user starts the power tool, the rotating shaft can drive the processing tool to rotate. For grinding and polishing or other processing operations. The conventional processing tool's loading and unloading method is shown in Fig. 7 of M518149. The operating handle 10 must be clamped to the spindle 441 to limit the rotation of the spindle 441, and then the working piece 442 screwed to the spindle 441 (ie Grinding disc), the working piece 442 is rotated relative to the mandrel, and then the working piece 442 is separated from the mandrel 441 so that the working piece 442 can be replaced.

When the power tool is installed with the processing tool, the user must hold the operating handle with one hand to restrict the rotation of the rotating shaft, and the other hand to load and unload the processing tool, so that the user cannot hold the power tool in hand and cannot maintain the power tool during the loading and unloading process It is also impossible to keep the power tool at an angle that is convenient for the user to load and unload the processing tool (for example, the end of the power tool is installed with the processing tool upward). Therefore, the power tool must be kept in the The angle direction shown in Fig. 7 of M518149, that is, the end of the power tool installed with the processing tool is placed downwards. However, in this case, the angle direction of the power tool is not only unfavorable for the user to rotate the processing tool, but the power tool is also easy Shaking or tipping occurs during the loading and unloading of the processing tool, causing inconvenience to the user, and it needs to be solved and improved.

One of the objectives of this creation is to provide a rotating shaft locking device that can lock the rotating shaft of the power tool so that the user does not need to hold the operating handle to restrict the rotation of the rotating shaft.

In order to achieve the above-mentioned object, the present invention provides a rotating shaft locking device which is installed on a power tool to lock a rotating shaft at the front end of the power tool. The rotating shaft penetrates the rotating shaft locking device along an axis, and the rotating shaft locking device includes a control member , Moving parts, elastic parts, and moving parts. The control member has a guiding part. The moving part has an abutting part and a base, the base has a first abutting surface, and the position of the abutting part corresponds to the guiding part of the control part. The elastic piece pushes against the moving piece, so that the moving piece abuts against the control piece. The detent member is located on the rotating shaft of the power tool, the detent member has a second abutting surface, and the movable member is displaced back and forth along the axis relative to the detent member. Wherein, the control member can rotate relative to the power tool along the axis. When the control member rotates from an unlocked position to a locked position, the guide portion of the control member moves relative to the abutting portion of the moving member, In order to guide the moving part to move along the axis, the first abutting surface of the movable part is locked on the second abutting surface of the detent, so that the shaft of the power tool cannot rotate along the axis .

In some cases, the guide portion of the control member has a first guide surface and a second guide surface, and when the control member is in the locking position, the abutting portion of the moving member abuts against the first guide surface With two guide surfaces, when the control member is in the unlocking position, the abutting portion of the moving member abuts against the first guide surface. Preferably, the guide portion of the control member has a middle guide surface, and two sides of the middle guide surface are respectively connected to the first guide surface and the second guide surface. Furthermore, the guiding portion of the control member may have a stop surface, and when the control member rotates along the axis, the stop surface can abut the control member to prevent the control member from continuing to rotate.

In some cases, the control member has a top surface, the top surface and the guiding portion are located on opposite sides of the control member, and the distance between the first guide surface and the top surface is greater than the second guide surface The distance from the top surface.

In some cases, the abutting part of the moving part extends from the base part toward the control part.

In some cases, the rotating shaft locking device may have a connecting piece, and the moving piece penetrates the connecting piece. Specifically, the connecting member may have an accommodating groove, and the moving member may have a radial portion protruding from the outer peripheral surface of the base, and the radial portion is inserted into the connecting member. Housing tank. The connecting piece may also be radially projected with a stopper, and the stopper can be inserted into a slot of the power tool. In addition, the connecting member may have a first positioning member, a second positioning member, and a clamping member. The second positioning member further has a card slot, and the clamping member is accommodated in the card of the second positioning member. Slot, and both ends of the clamping member are inserted into the first positioning member. Furthermore, the first positioning member may also have an abutting surface, and the second positioning member may have an abutting surface, the shape and position of the abutting surface correspond to the abutting surface, and the abutting surface can Lean against the top surface to prevent the first positioning member from rotating relative to the second positioning member.

In some cases, the base of the moving element is ring-shaped, the inner peripheral surface of the base has the first abutting surface, and the outer peripheral surface of the detent has the second abutting surface.

In this way, the rotating shaft locking device provided by the present creation is to lock or unlock the rotating shaft of the power tool by guiding the front and back displacement of the moving part through the rotation of the control part. When loading and unloading the processing tool, the user only needs to rotate the control member to the locked position, so that the first abutment surface of the movable member is locked to the second abutment surface of the detent, so that the shaft of the power tool cannot be rotated , Without the need to hold the operating handle to limit the rotation of the shaft. Therefore, the user can hold the power tool with one hand and load and unload the processing tool with the other. This not only prevents the power tool from tipping during the loading and unloading process, but also keeps the power tool convenient for the user The angular direction of loading and unloading processing tools increases the convenience of use.

Please refer to Figures 1 to 6, the first embodiment of this creation discloses a shaft locking device, which is installed on a power tool 90 to lock the shaft 91 of the power tool 90. Specifically, the front end of the power tool 90 has a shaft 91. The rotating shaft 91 penetrates the rotating shaft locking device along an axis. The rotating shaft 91 has a sleeve portion 911, a clamping portion 912 and a shaft body 913. The sleeve portion 911 is screwed to the shaft body 913 for the wrench to be sleeved. The clamping portion 912 Passing through the shaft 913, the clamping portion 912 has a plurality of clamping blocks 9121 arranged in a ring shape and can be relatively opened and closed. Therefore, the user can fit the wrench on the sleeve portion 911 and make the sleeve portion 911 Rotate with respect to the shaft 913 to control the relative opening and closing of the plurality of clamping blocks 9121, so that the clamping portion 912 clamps or releases the processing tool. The rear end of the power tool 90 is connected to a driving source, which is used to provide high-pressure gas or electric power. The drive shaft 91 rotates along the axis, thereby driving the processing tool to rotate for processing operations. The shaft locking device of the first embodiment of the present invention includes a control member 10, a connecting member 20, a moving member 30, an elastic member 40 and a detent member 50.

The control member 10 is rotatably sleeved on the connecting member 20 and can rotate along the axis relative to the power tool 90 between a locked position and an unlocked position. As shown in Figures 2, 3 and 6, the control member 10 has a top surface 11 on one side, and a ring on the other side with first guide portions 12, 12' and second guide portions 13, 13' , The first guiding portions 12, 12' and the second guiding portions 13, 13' are in a groove shape, and the groove size of the first guiding portions 12, 12' is larger than that of the second guiding portions 13, 13', As shown in Figure 6. Since the shapes of the first guide portions 12, 12' and the second guide portions 13, 13' are substantially the same, only the first guide portion 12 is taken as an example for description below. The bottom surface of the first guide portion 12 has a first guide surface 121, a middle guide surface 122, and a second guide surface 123. As shown in FIGS. 2 to 5, the distance between the first guide surface 121 and the top surface 11 is greater than The distance between the second guide surface 123 and the top surface 11, the two sides of the middle guide surface 122 are respectively connected to the first guide surface 121 and the second guide surface 123, and the distance between the middle guide surface 122 and the top surface 11 starts from the first A guide surface 121 gradually decreases toward the second guide surface 123. In other words, the middle guide surface 122 is inclined relative to the top surface 11. Two opposite side surfaces of the first guiding portion 12 have stop surfaces 124 and 125, and the stop surfaces 124 and 125 are respectively connected to the first guide surface 121 and the second guide surface 123, as shown in FIGS. 3 and 6.

Please refer to FIG. 2 and FIG. 4, the connecting member 20 has a first positioning member 21 and a second positioning member 22, clamping members 23, 23', and a blocking portion 24. The inner peripheral surface of the first positioning member 21 is radially recessed with receiving grooves 211, 211', the positions of the receiving grooves 211, 211' are opposite, and the receiving grooves 211, 211' respectively extend along the axis. The positioning member 21 also has an abutting surface 212. One end of the second positioning member 22 is screwed to the power tool 90. The first positioning member 21 is sleeved on the second positioning member 22. The second positioning member 22 has a clamping groove 221 and a plurality of abutting surfaces 222. The clamping groove 221 is located on the Two annular grooves on the outer peripheral surface of the positioning member 22, a plurality of abutting surfaces 222 are located on the outer peripheral surface of the second positioning member 22, and the abutting surface 222 is a flat surface. The shape and position of the abutting surface 212 of the first positioning member 21 correspond to The abutting surface 222 enables the abutting surface 222 to abut against the abutting surface 212 to prevent the first positioning member 21 from rotating relative to the second positioning member 22. The clamping members 23, 23' are rod-shaped, the clamping members 23, 23' are respectively accommodated on opposite sides of the slot 221 of the second positioning member 22, and both ends of each clamping member are inserted in the first The positioning member 21 avoids the separation of the first positioning member 21 and the second positioning member 22. The stopper 24 is radially protruded from the first positioning member 21, and the stopper 24 is inserted into the slot 92 of the power tool 90 to prevent the first positioning member 21 from rotating relative to the power tool 90.

Please refer to Fig. 2, Fig. 4, Fig. 6 and Fig. 7, the moving part 30 penetrates the connecting part 20, and the moving part 30 is displaced back and forth along the axis relative to the detent part 50. The moving part 30 has a base 31 , The first abutting portions 32, 32', the second abutting portions 33, 33', and the radial portions 34, 34'. The base 31 has a ring shape, and the inner peripheral surface of the base 31 has a first engaging surface 311. The first abutting portions 32, 32' and the second abutting portions 33, 33' are circumferentially arranged on one side end surface of the base 31 and extend axially toward the direction of the control member 10. The first abutting portions 32, 32' The positions of the second abutting portions 33, 33' are relative to each other. The first abutting portions 32, 32' and the second abutting portions 33, 33' have approximately the same shape, and the difference lies in the first abutting portions 32, 32 'Extend radially and protrude from the outer peripheral surface of the base 31. The radial portions 34, 34' are respectively protruded on the outer peripheral surface of the base 31, the radial portions 34, 34' are respectively connected to the first abutting portions 32, 32', and the radial portions are respectively inserted into the first positioning member The accommodating groove, as shown in FIG. 7, prevents the moving part 30 from rotating relative to the first positioning part 21. It should be noted that the dotted lines between the first abutting portions 32, 32' and the radial portions 34, 34' in Figure 2 are imaginary lines for the purpose of description. In this embodiment, the first abutting portion 32 and the radial portion 34 are integrally formed, and the first abutting portion 32' and the radial portion 34' are integrally formed. However, if the first abutting portion is connected to the radial direction by adhesion, welding or other methods, Department, nothing is impossible.

Please refer to Figures 2, 3 and 4, the elastic member 40 penetrates the connecting member 20, and the elastic member 40 elastically pushes the moving member 30 so that the first abutting portions 32, 32' of the moving member 30 respectively abut The first guiding portion 12, 12' of the control element 10 is leaned against, and the second abutting portion 33, 33' abuts against the second guiding portion 13, 13' of the control element 10, respectively.

Please refer to Figures 2 and 4, the detent 50 is located on the shaft 91 of the power tool 90. In this embodiment, the detent 50 is integrally formed on the shaft 913 of the shaft 91. If the detent 50 is changed to It is also a feasible embodiment to sleeve the shaft 913 for the ring element. The detent 50 is in the shape of a hexagonal column. The outer peripheral surface of the detent 50 has a second abutting surface 51. The shape of the first abutting surface 311 of the base 31 of the movable member 30 corresponds to the second detent 50 of the detent 50. Card reaches face 51.

Since the shape of the first guiding portion and the second guiding portion of the control element are approximately the same, and the shape of the first abutting portion and the second abutting portion of the moving element are approximately the same, and the first abutting portion abuts In the first guiding part, the second abutting part abuts against the second guiding part. Therefore, when the control member rotates along the axis, the action of the first guiding part relative to the first abutting part is the same as the second The operating manner of the guiding portion relative to the second abutting portion is substantially the same, and the following only uses the operating manner of the first guiding portion 12 relative to the first abutting portion 32 as an example for description.

Please refer to Figure 2, Figure 3 and Figure 4, when the user performs processing operations, the control member 10 is in the unlocked position, that is, the first guide surface 121 of the first guide portion 12 of the control member 10 abuts and moves The first abutting portion 32 of the member 30 displaces the moving member 30 backward to compress the elastic member 40, and the first abutting surface 311 of the base 31 of the movable member 30 is not clamped to the second abutting surface of the detent 50 51. Therefore, when the user starts the power tool 90, the rotating shaft 91 can rotate along the axis, thereby driving the processing tool to rotate for processing operations.

Please refer to Figure 2, Figure 3 and Figure 5 to Figure 7. When the user wants to remove or replace the processing tool, he only needs to turn the control member 10 in the first direction (for example, clockwise) to the locked position. The first abutting portion 32 of the moving member 30 is guided from the first guide surface 121 of the control member 10 to the second guide surface 123 via the guide surface 122, and at the same time, the elastic member 40 is elastically reset and pushed to move The member 30 is moved forward, so that the first abutting surface 311 of the base 31 of the moving member 30 is clamped on the second abutting surface 51 of the detent 50, because the detent 50 is a hexagonal column, and the movable member The shape of the first engaging surface 311 of 30 corresponds to the second engaging surface 51 of the detent 50, as shown in Figures 2 and 5, and the first engaging surface 311 of the moving element 30 can be used It is clamped on the second abutting surface 51 of the detent 50 to lock the shaft 913 of the rotating shaft 91 of the power tool 90, so that the shaft 913 cannot rotate along the axis, and the user can sleeve the wrench 93 on the sleeve 911 and make the sleeve portion 911 rotate relative to the shaft, as shown in Figure 7, so that the clamping blocks 9121 of the clamping portion 912 are relatively opened and closed, and the clamping portion 912 releases the processing tools for removal or replacement Processing tools.

In view of the above, when the user replaces another processing tool and inserts it into the clamping portion, the sleeve can be reversely rotated by the wrench so that the clamping portion can clamp the processing tool, and then the processing tool is installed on the rotating shaft , And then rotate the control member in the second direction (for example, counterclockwise) to the unlocked position as shown in Figure 4, so that the first abutment portion of the moving member passes through the middle guide surface from the second guide surface of the control member The guide is slid to the first guide surface, so that the control member is in the unlocked position. At this time, the user can start the power tool to make the rotating shaft drive the processing tool to rotate for subsequent processing operations.

Please refer to FIG. 6, because the opposite sides of the first guiding portion 12 of the control member 10 have stop surfaces 124, 125, when the control member 10 rotates along the axis to the unlocked position in the second direction, the stop surfaces 124 It can abut against the first abutment portion 32 of the control element 10 to prevent the control element 10 from continuing to rotate in the second direction. On the contrary, when the control element 10 rotates along the axis to the locked position in the first direction, the stop surface 125 can abut against the first abutting portion 32 of the control member 10 to prevent the control member 10 from continuing to rotate in the first direction.

In the above embodiment, the moving part has a first abutting part and a second abutting part. In other possible embodiments of the invention, the moving part may have both the first abutting part and the second abutting part. Either one is also a feasible implementation.

In the above embodiment, the radial part of the moving part is connected to the first abutting part. In other possible embodiments of the present invention, the radial part may be provided separately from the first abutting part, as long as the radial part can be inserted The accommodating groove of the first positioning member, as shown in FIG. 7, can prevent the moving member from rotating relative to the first positioning member, and has a similar use effect as the above embodiment.

In summary, this creation provides a shaft locking device for locking the shaft of a power tool to restrict the rotation of the shaft. When assembling and disassembling the processing tool, the user only needs to rotate the control part to the locked position, so that the guiding part of the control part guides the moving part to move forward, so that the first abutting surface of the moving part is locked on the detent part The second clamping surface locks the rotating shaft of the power tool. Therefore, the user can hold the power tool in one hand and load and unload the processing tool in the other hand. This not only prevents the power tool from tipping during the loading and unloading process, but also keeps the power tool convenient The angle of the user's loading and unloading of the processing tool increases the convenience of use, which is actually expected by the industry and the user. However, the above embodiments are only to illustrate and illustrate the technical content of this creation. The patent scope of this patent should be the following patent application The scope shall prevail.

10: Control parts 11: top surface 12,12’: The first guiding part 121: First guide surface 122: Middle guide surface 123: Second guide surface 124, 125: Stop surface 13, 13’: The second guiding part 20: link 21: The first positioning piece 211,211’: holding tank 212: contact surface 22: The second positioning piece 221: card slot 222: Reach the top surface 23,23’: Card holder 24: Stop 30: Moving parts 31: Base 311: The first card arrives 32, 32’: The first abutment part 33, 33’: The second abutment part 34, 34’: Radial part 40: Elastic part 50: Detent 51: The second card arrives 90: power tools 91: shaft 911: Nesting Department 912: Clamping part 9121: clamp block 913: Shaft 92: slot 93: Wrench

Figure 1 is a perspective view of the power tool with the first embodiment of the invention. Figure 2 is a three-dimensional exploded view of the first embodiment of the creation. Figure 3 is a perspective view of the control element of the first embodiment of the creation. Figure 4 is a cross-sectional view of the first embodiment of the creation in the unlocked position. Figure 5 is a cross-sectional view of the first embodiment of the creation in the locked position. Figure 6 is another cross-sectional view of the first embodiment of the creation in the locked position. Figure 7 is a schematic diagram of the use of the power tool with the first embodiment of the invention when loading and unloading processing tools.

10: Control parts

11: top surface

123: Second guide surface

21: The first positioning piece

22: The second positioning piece

311: The first card arrives

32: The first abutment part

40: Elastic part

51: The second card arrives

90: power tools

91: shaft

911: Nesting Department

9121: clamp block

913: Shaft

Claims (11)

A rotating shaft locking device is used to install on a power tool to lock a rotating shaft at the front end of the power tool. The rotating shaft penetrates the rotating shaft locking device along an axis. The rotating shaft locking device includes: a control member having a A guide part; a moving part having an abutting part and a base, the base having a first abutting surface, the position of the abutting part corresponds to the guiding part of the control part; an elastic part , The elastic part pushes against the moving part, so that the moving part abuts against the control part; a detent is located on the shaft of the power tool, the detent has a second abutting surface, and the movable part is Relative to the detent member, move back and forth along the axis; wherein, the control member can rotate relative to the power tool along the axis, and when the control member rotates from an unlocked position to a locked position, the guide portion of the control member Move relative to the abutting portion of the moving piece to guide the moving piece to move along the axis, so that the first abutting surface of the moving piece is latched on the second abutting surface of the detenting piece, thereby making The rotating shaft of the power tool cannot rotate along the axis; wherein, the base of the moving part is ring-shaped, the inner peripheral surface of the base has the first abutting surface, and the outer peripheral surface of the detent has the second clamp Arrived. According to claim 1 of the scope of patent application, the guiding portion of the control member has a first guide surface and a second guide surface, and when the control member is in the locked position, the moving member The abutting portion abuts against the second guide surface, and when the control member is in the unlocking position, the abutting portion of the moving member abuts against the first guide surface. As described in claim 2 of the scope of patent application, the control member has a top surface, the top surface and the guide portion are located on opposite sides of the control member, and the first guide surface and the top surface are The distance between is greater than the distance between the second guide surface and the top surface. According to claim 2 of the scope of patent application, the guide portion of the control member further has a middle guide surface, and two sides of the middle guide surface are respectively connected to the first guide surface and the second guide surface . For the shaft locking device described in claim 1, wherein the guiding portion of the control member has a stop surface, and when the control member rotates along the axis, the stop surface can abut against the control member To prevent the control from continuing to rotate. The rotating shaft locking device according to claim 1 of the scope of patent application, wherein the abutting part of the moving part extends from the base part toward the control part. According to claim 1 of the scope of patent application, the rotating shaft locking device further has a connecting member, and the moving member passes through the connecting member. As described in claim 7 of the scope of patent application, the connecting member further has a accommodating groove, the moving member further has a radial portion, the radial portion is protrudingly provided on the outer peripheral surface of the base, and the The radial part is inserted into the containing groove of the connecting piece. As described in claim 7 of the scope of patent application, the connecting member is provided with a stop portion protruding radially, and the stop portion is inserted into a slot of the power tool. As described in claim 7 of the scope of patent application, the connecting member has a first positioning member, a second positioning member and a clamping member, the second positioning member further has a card slot, the clamping member The component is accommodated in the slot of the second positioning component, and both ends of the clamping component are inserted into the first positioning component. According to claim 10 of the scope of patent application, the shaft locking device, wherein the first positioning member has an abutting surface, the second positioning member has an abutting surface, and the shape and position of the abutting surface correspond to the abutting surface And the abutting surface can abut against the abutting surface to prevent the first positioning member from rotating relative to the second positioning member.

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