TWI749779B - Inner hole grinding device - Google Patents

Abstract

The present invention is an inner hole grinding device, which includes a body, a grinding head mounting set and a pressing assembly, wherein the grinding head mounting set includes an extension rod and a screw unit, one end of the extension rod and the body The drive shaft is combined with a latch structure, the screw unit is coupled to the other end of the extension rod, the pressing component is arranged on one side of the body, and after being pressed, it can extend into the latch structure, And restrict the rotation of the extension rod, so that the user can easily hold the body with one hand and press the pressing component to fix the extension rod, and hold a wrench in the other hand to remove the screw unit to facilitate replacement of the grinding head. Therefore, the present invention effectively solves the disadvantages of the conventional inner hole grinding device that the screw unit is difficult to disassemble and assemble, and it is difficult to easily replace the grinding head.

Description

Inner hole grinding device

The invention relates to a grinding device, in particular to an inner hole grinding device.

The existing inner hole grinding device includes a body and a grinding head mounting set. The body is provided with a pneumatic motor, and the pneumatic motor has a drive shaft. The grinding head mounting set includes an extension rod, a collet and a screw. Cap, one end of the extension rod is combined with the drive shaft, and with the rotation of the drive shaft, the collet is clamped on the end of the extension rod away from the drive shaft, so as to install a grinding head, the nut is screwed on One end of the extension rod away from the drive shaft is used to tighten the collet to fix the grinding head.

In order to prevent the nut from rotating with the extension rod when the nut is rotated through the wrench, it is generally necessary for the user to hold another wrench and fix the extension. Lever, the user can rotate the nut with both hands in opposite directions.

However, in this way, the user must hold the wrench with both hands, and can no longer hold the existing inner hole grinding device. Therefore, the existing inner hole grinding device must be placed on a workbench before the nut can be disassembled. Cause inconvenience in use.

In summary, the existing inner hole grinding device has the disadvantages that the nut is not easy to disassemble and assemble, and it is difficult to easily replace the grinding head, and there is indeed room for improvement.

In order to solve the shortcomings of the existing inner hole grinding device that the nut is difficult to disassemble and assemble, and it is difficult to easily replace the grinding head, the present invention provides an inner hole grinding device that has a pressing component that can restrict the rotation of the extension rod, which effectively improves the above problem, and further described as follows.

The present invention provides an inner hole grinding device, which includes: a body provided with a drive shaft and an accommodating hole, and the drive shaft is rotatably arranged on the body Inside, the accommodating hole is provided on one side of the body; an extension rod, one end of the extension rod is combined with the drive shaft of the body, and the accommodating hole extends toward the extension rod, and the extension rod is provided with a card After the extension rod rotates with the drive shaft, the latch structure can be linearly opposed to the accommodating hole of the body; a screw unit, the screw unit is screwed on the extension rod away from the drive shaft And a pressing component, the pressing component is provided in the receiving hole of the body, and the pressing component can extend into the latch structure after being pressed, and restrict the rotation of the extension rod.

In the above-mentioned inner hole grinding device, wherein the containing hole is provided with an internal thread, the pressing component includes a screw member, a movable member and a pressing block, wherein the screw member is combined with the internal thread of the containing hole, the The movable part can slidably pass through the screwed part, and the movable part can extend into the latch structure, and the pressing block is combined with an end of the movable part away from the latch structure.

Further, in the above-mentioned inner hole grinding device, the pressing component includes an elastic member, the elastic member is sleeved on the movable member, and both ends of the elastic member abut against the screw member and the pressing block, respectively.

Still further, in the above-mentioned inner hole grinding device, the movable part is provided with a stop flange, and the stop flange protrudes radially on the movable part and is located between the screw part and the latch structure.

Preferably, in the above-mentioned inner hole grinding device, the catch structure is a through hole.

The present invention further provides another inner hole grinding device, which includes: a body, the body is provided with a drive shaft and an accommodating hole, the drive shaft is rotatably arranged inside the body, and the accommodating hole is arranged in the body One side of the body; an extension rod, one end of the extension rod is combined with the drive shaft of the body, and the accommodating hole extends toward the extension rod, the extension rod is provided with a plurality of latching structures, the plurality of The detent structures are arranged on the extension rod at intervals, so that the detent structures can be linearly opposed to the accommodating hole of the main body after the extension rod rotates with the drive shaft; A screwing unit, the screwing unit is screwed on the end of the extension rod away from the drive shaft; and a pressing assembly, the pressing assembly is arranged in the accommodating hole of the body, and the pressing assembly can be pressed It extends into one of the latching structures and restricts the rotation of the extension rod.

In the above-mentioned inner hole grinding device, wherein the containing hole is provided with an internal thread, the pressing component includes a screw member, a movable member and a pressing block, wherein the screw member is combined with the internal thread of the containing hole, the The movable part can slidably pass through the screwed part, and the movable part can extend into one of the latching structures of the extension rod, and the pressing block is coupled to an end of the movable part away from the extension rod.

Further, in the above-mentioned inner hole grinding device, the pressing component includes an elastic member, the elastic member is sleeved on the movable member, and both ends of the elastic member abut against the screw member and the pressing block, respectively.

Preferably, in the above-mentioned inner hole grinding device, the movable part is provided with a stop flange, and the stop flange protrudes radially on the movable part and is located between the screw part and the extension rod.

With the above technical features, when the user needs to disassemble the screw unit and replace the grinding head, he can simply hold the body with one hand and press the pressing assembly to fix the extension rod, and hold a wrench in the other hand to pass through The wrench abutment surface of the screwing unit is used to disassemble the screwing unit to facilitate replacement of the grinding head. Without other support, the user can still disassemble the screw unit easily and firmly. In summary, the present invention effectively solves the disadvantages of the existing inner hole grinding device that the screw cap is difficult to disassemble and assemble, and it is difficult to easily replace the grinding head. An inner hole grinding device that can easily disassemble the nut and replace the grinding head.

10: body

101: Press the switch

11: Air motor

111: drive shaft

12: end cap

121: accommodating hole

122: internal thread

20: Grinding head installation group

21: Extension rod

211: Card switch structure

212: Wrench abutment surface

22: Collet

23: Screw unit

231: Wrench abutment surface

30: Press the component

31: Screw parts

32: movable parts

321: Stop flange

33: Press block

34: Elastic part

Figure 1 is a perspective view of a preferred embodiment of the present invention.

Figure 2 is another perspective view of the preferred embodiment of the present invention.

Fig. 3 is a cross-sectional perspective view of a preferred embodiment of the present invention.

Fig. 4 is a perspective exploded view of the polishing head mounting set and pressing assembly of the preferred embodiment of the present invention.

Figure 5 is a side cross-sectional view of a preferred embodiment of the present invention.

Fig. 6 is a schematic diagram of the operation of the preferred embodiment of the present invention.

In order to understand the technical features and practical effects of the present invention in detail, and to implement it in accordance with the content of the specification, the preferred embodiment shown in the drawings is further described in detail as follows: the present invention is an inner hole grinding device, which is more The preferred embodiment is shown in FIGS. 1 to 4, which includes a main body 10, a polishing head mounting set 20, and a pressing assembly 30. The main body 10 is slightly cylindrical, and the main body 10 is connected to an air supply. The main body 10 is connected to the power source, and the body 10 is provided with a push switch 101 and a pneumatic motor 11, wherein the push switch 101 is arranged on one side of the body 10, the pneumatic motor 11 is arranged in the body 10, and the user presses the push switch At 101, high-pressure gas can be introduced into the body 10 to drive the drive shaft 111 of the air motor 11 to rotate. The operation of the push switch 101 is in the prior art, so it will not be described in detail.

Furthermore, the main body 10 is further provided with an end cover 12 which is combined with the front end of the main body 10 so that the air motor 11 is confined in the main body 10. The end cover 12 is an annular structure, and the end cover 12 The cover 12 is provided with an accommodating hole 121 which is radially penetratingly arranged on one side of the end cover 12 and communicates with the internal space of the end cover 12. The accommodating hole 121 is partially provided with a middle section Internal thread 122.

The grinding head mounting set 20 is combined with the main body 10 and includes an extension rod 21, a collet 22 and a screw unit 23, wherein one end of the extension rod 21 is screwed with the drive shaft 111 of the main body, And the accommodating hole 121 extends toward the extension rod 21. The extension rod 21 is provided with at least one latch structure 211, and after the extension rod 21 rotates with the drive shaft 111, the at least one latch structure 211 can interact with The accommodating holes 121 of the main body 10 are straightly opposed to each other. In the preferred embodiment of the present invention, the extension rod 21 is hollow. Shape, with two detent structures 211, the two detent structures 211 are spaced apart and diametrically oppositely arranged on the extension rod 21, so that each of the detent structures 211 can follow the extension rod 21 with the drive shaft After the rotation, 111 is linearly opposed to the accommodating hole 121, and each of the latching structures 211 is a through hole. In other embodiments, the latching structure 211 may also be a groove.

The collet 22 is arranged in an end of the extension rod 21 away from the drive shaft 111 for mounting a grinding head; the screw unit 23 is screwed on an end of the extension rod 21 away from the drive shaft 111, thereby forcing Tighten the collet 22 to fix the grinding head. In a preferred embodiment of the present invention, the screw unit 23 is a nut, and the extension rod 21 and the screw unit 23 are respectively provided with a wrench abutment surface 212 231, wherein the spanner abutting surface 212 of the extension rod 21 is selectively provided.

Please refer to Figures 3 to 6, the pressing component 30 is disposed in the accommodating hole 121 of the main body 10, and after being pressed, the pressing component 30 can extend into the latch structure 211 and restrict the extension rod 21. Further, the pressing assembly 30 includes a screw part 31, a movable part 32, a pressing block 33, and an elastic part 34. The screw part 31 is disposed in the accommodating hole 121 and is connected to the The internal thread 122 of the accommodating hole 121 is combined; the movable member 32 can slide through the screw member 31, and the movable member 32 can extend into one of the latching structures 211 of the extension rod 21 to limit the extension When the rod 21 rotates, the movable part 32 is provided with a stop flange 321, and the stop flange 321 is radially protruded on the movable part 32 and is located between the screw part 31 and the extension rod 21; The pressing block 33 is screwed with one end of the movable member 32 away from the extension rod 21; the elastic member 34 is sleeved on the movable member 32, and both ends of the elastic member 34 abut against the screw member 31 and the screw member 31, respectively. Press block 33.

As shown in FIG. 5, before the pressing assembly 30 is pressed, the elastic member 34 pushes the pressing block 33 away from the screw member 31. At this time, the stop flange 321 of the movable member 32 and the screw The engaging member 31 is pressed against each other to prevent the movable member 32 from falling out of the accommodating hole 121; further, as shown in FIG. 6, after the user presses the pressing block 33, the pressing block 33 faces the screw member 31 Moves, the elastic member 34 is compressed, and the end of the movable member 32 away from the pressing block 33 extends into one of the latching structures 211, and is in contact with the The extension rod 21 is locked with each other, so that the extension rod 21 cannot rotate.

In addition, when the pressing assembly 30 fails and cannot function, the wrench abutment surface 212 provided on the extension rod 21 allows the user to still disassemble the screw unit 23 in the manner of the existing inner hole grinding device.

With the above technical features, when the user needs to disassemble the screw unit 23 and replace the grinding head, he can simply hold the body 10 with one hand and press the pressing assembly 30 to fix the extension rod 21 while holding the other hand A wrench, through the wrench abutting surface 231 of the screwing unit 23, so as to disassemble the screwing unit 23 to facilitate replacement of the grinding head. In this process, the inner hole grinding device is firmly held by the user's hand Therefore, even if suspended in the air and without other support, the user can easily and firmly disassemble the screw unit 23. In summary, the present invention effectively solves the problem that the existing inner hole grinding device has a screw cap that is difficult to disassemble and assemble. The disadvantage of replacing the grinding head is to provide an inner hole grinding device that can easily disassemble the nut and replace the grinding head.

The above are only preferred embodiments of the present invention, and do not limit the present invention in any form. Anyone with ordinary knowledge in the relevant technical field can use the present invention without departing from the scope of the technical solution proposed by the present invention. The disclosed technical content has partially changed or modified equivalent embodiments without departing from the technical solution content of the present invention, and all still fall within the scope of the technical solution of the present invention.

10: body

101: Press the switch

20: Grinding head installation group

30: Press the component

Claims (10)

An inner hole grinding device includes: a body provided with a drive shaft and an accommodating hole, the drive shaft is rotatably arranged inside the body, and the accommodating hole is arranged on one side of the body An extension rod, one end of the extension rod is combined with the drive shaft of the body, and the accommodating hole extends toward the extension rod, the extension rod is provided with a latch structure, and the extension rod rotates with the drive shaft Afterwards, the latch structure can be linearly opposed to the accommodating hole of the body; a screwing unit that is screwed on an end of the extension rod away from the drive shaft; and a pressing assembly that is arranged at In the accommodating hole of the main body, and after being pressed, the pressing component can extend into the catch structure and restrict the rotation of the extension rod. The inner hole grinding device according to claim 1, wherein the accommodating hole is provided with an internal thread, the pressing component includes a screw member, a movable member and a pressing block, wherein the screw member and the accommodating hole In combination with internal threads, the movable part can slide through the screwed part, and the movable part can extend into the locking structure, and the pressing block is connected to an end of the movable part away from the locking structure. The inner hole grinding device according to claim 2, wherein the pressing component includes an elastic member, the elastic member is sleeved on the movable member, and two ends of the elastic member abut against the screw member and the pressing block, respectively . The inner hole grinding device according to claim 2, wherein the movable part is provided with a stop flange, and the stop flange is radially protruded on the movable part and is located between the screw part and the latch structure between. The inner hole grinding device according to claim 3, wherein the movable part is provided with a stop flange, and the stop flange is radially protruded on the movable part and is located between the screw part and the latch structure between. The inner hole grinding device according to any one of claims 1 to 5, wherein the latch The structure is a perforation. An inner hole grinding device includes: a body provided with a drive shaft and an accommodating hole, the drive shaft is rotatably arranged inside the body, and the accommodating hole is arranged on one side of the body An extension rod, one end of the extension rod is combined with the drive shaft of the body, and the accommodating hole extends toward the extension rod, the extension rod is provided with a plurality of latching structures, the plurality of latching structures are spaced apart Is arranged on the extension rod, so that each of the latch structures can be linearly opposed to the accommodating hole of the body after the extension rod rotates with the drive shaft; a screwing unit, the screwing unit is screwed on the An end of the extension rod far away from the drive shaft; and a pressing component, the pressing component is arranged in the accommodating hole of the body, and after being pressed, the pressing component can extend into one of the latching structures and restrict the extension rod Rotate. The inner hole grinding device according to claim 7, wherein the accommodating hole is provided with an internal thread, the pressing component includes a screw part, a movable part and a pressing block, wherein the screw part and the accommodating hole In combination with internal threads, the movable part can slide through the screwed part, and the movable part can extend into one of the latching structures of the extension rod. The pressing block is coupled to an end of the movable part away from the extension rod. The inner hole grinding device according to claim 8, wherein the pressing component includes an elastic member, the elastic member is sleeved on the movable member, and two ends of the elastic member abut the screw member and the pressing block respectively . The inner hole grinding device according to claim 8 or 9, wherein the movable part is provided with a stop flange, and the stop flange is radially protruded on the movable part and is located between the screw part and the extension rod between.

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