Clamp for machining electric tool shaft

Abstract

The utility model relates to a clamp for machining an electric tool shaft, and relates to the technical field of machine tool clamps, the clamp comprises an operation table, a positioning block is fixedly connected to the operation table, a limiting column extending into a flower hole of the electric tool shaft is arranged on the positioning block, and an oil cylinder is fixedly connected to the operation table; the end, close to the limiting column, of a piston rod of the oil cylinder is fixedly connected with a push head stretching into a penetrating hole of the electric tool shaft, and the push head and the positioning block are matched with each other to clamp the electric tool shaft. The electric tool shaft has the advantages that the peripheral side wall of the electric tool shaft can be exposed in the air, and a milling cutter can conveniently machine the peripheral side wall of the electric tool shaft.

Description

Technical Field

[0001] This application relates to the technical field of machine tool fixtures, and particularly to a fixture for machining electric tool shafts. Background Art

[0002] A machine tool fixture is a device on a machine tool for clamping workpieces and guiding cutting tools. It refers to a fixture specifically designed for a certain process of a certain workpiece. The machine tool contacts the positioning reference of the workpiece to determine the correct position of the workpiece in the fixture, thereby ensuring the relative correct position between the workpiece and the cutting tool and the machining movement of the machine tool during machining.

[0003] During the machining process of various electric tools, it is necessary to set up suitable fixtures for each part. Among them, as shown in the electric tool shaft Figure 1 The electric tool shaft is hollow inside and is evenly provided with three oval through holes on the circumferential side wall. One end of the electric tool shaft is integrally provided with a connecting block, and the connecting block is provided with a through hole communicating with the hollow inside. The connecting block is also provided with an embedding groove penetrating the outer side wall and communicating with the through hole. The inner side wall of the other end of the electric tool shaft is provided with a hexagonal flower hole communicating with the through hole, and the through hole and the flower hole are coaxially arranged. Usually, it is necessary to machine the through holes on the electric tool shaft.

[0004] Currently, the electric tool shaft is usually clamped by the jaws on the machine tool. However, clamping the outer side wall of the electric tool shaft by the jaws will affect the machining of the electric tool shaft by the tool head, and it is necessary to adjust the clamping position of the jaws multiple times, resulting in insufficient position accuracy of the three through holes and inconvenient machining, and there is still room for improvement. Utility Model Content

[0005] In order to expose the outer side wall of the electric tool shaft as much as possible to facilitate the subsequent machining of the outer side wall of the electric tool shaft by the machine tool, this application provides a fixture for machining electric tool shafts.

[0006] A fixture for machining an electric tool shaft provided by this application adopts the following technical solution:

[0007] A fixture for machining an electric tool shaft includes an operating table, a positioning block fixedly connected to the operating table, a limiting column extending into the flower hole of the electric tool shaft provided on the positioning block, an oil cylinder fixedly connected to the operating table, and a push head fixedly connected to one end of the piston rod of the oil cylinder and extending into the through hole of the electric tool shaft. The push head and the positioning block cooperate with each other to clamp the electric tool shaft.

[0008] By adopting the above technical solution, one end of the electric tool shaft is sleeved on the limit post, so that one end of the electric tool shaft abuts against the positioning block. The oil cylinder drives the push head to move and extend into the electric tool shaft. The push head and the positioning block cooperate with each other to clamp the entire electric tool shaft from both ends of the electric tool shaft, so that the outer circumferential side wall of the electric tool shaft is completely exposed to the air, which is convenient for the milling cutter on the machine tool to process the electric tool shaft and improves the accuracy of the through hole processing on the electric tool shaft.

[0009] Optionally, the limit post is slidably connected to the positioning block and extends outside the opposite side walls of the positioning block.

[0010] By adopting the above technical solution, the setting of the limit post can initially position the electric tool shaft, avoiding the need for staff to manually support the electric tool shaft throughout the process before the push head moves to abut against the electric tool shaft. The limit post slides on the positioning block, and the staff can control the length of the limit post to position the electric tool shaft, improving the use efficiency of the limit post.

[0011] Optionally, a first mounting hole for screw thread fit is provided on the positioning block, and a second mounting hole communicating with the first mounting hole and for screw thread fit is provided on the limit post.

[0012] By adopting the above technical solution, the setting of the first mounting hole and the second mounting hole enables the limit post to be fixed to the positioning block by screw threads, thereby fixing the extended length of the limit post and reducing the possibility of crosstalk.

[0013] Optionally, a plurality of limiting surfaces are provided on the circumferential side wall of the limit post.

[0014] By adopting the above technical solution, the setting of the limiting surfaces enables the limiting surfaces on the limit post to cooperate with the spline holes inside the electric tool shaft for limiting, reducing the possibility of slight circumferential rotation of the milling cutter during the processing, and further increasing the clamping stability of the electric tool shaft.

[0015] Optionally, a guiding surface is provided on the outer circumferential side wall of one end of the push head close to the limit post.

[0016] By adopting the above technical solution, the setting of the guiding surface enables the push head to more easily extend into the through hole of the electric tool shaft during the movement, reducing the wear of the inner side wall of the electric tool shaft when the push head extends into the through hole, thereby improving the use efficiency of the push head.

[0017] Optionally, a butting block is fixedly connected to the operating table, and the butting block is located between the push head and the operating table.

[0018] By adopting the above technical solution, the provision of the abutting block enables the operator to use the abutting block as a positioning point to move towards the positioning block when installing one end of the electric tool shaft on the limiting post, thereby improving the installation efficiency of the electric tool shaft.

[0019] Optionally, an avoidance hole for the cutter head to extend into is formed on the operating table.

[0020] By adopting the above technical solution, the provision of the avoidance hole enables the milling cutter to cut the electric tool shaft from below the operating table, and the milling cutter can drill holes in multiple directions on the electric tool shaft, thereby improving the overall processing efficiency.

[0021] Optionally, the number of the oil cylinders, the push heads and the abutting blocks is two, and they are respectively located on opposite sides of the positioning block in one-to-one correspondence.

[0022] By adopting the above technical solution, the number of the oil cylinders, the push heads and the abutting blocks is two, which are symmetrically arranged with respect to the positioning block. There are two sets of jigs on the two opposite side walls of the positioning block, so that two electric tool shafts can be processed simultaneously, thereby improving the overall processing efficiency of the machine tool.

[0023] Optionally, it further includes a mounting seat, and the end of the operating table is rotatably connected to the mounting seat.

[0024] By adopting the above technical solution, the provision of the mounting seat enables the entire operating table to rotate circumferentially around the axial center of the electric tool shaft under the control of the mounting seat, so as to rotate the avoidance hole on the operating table to the upper side or to face the milling cutter, which is convenient for the machine tool to process.

[0025] In summary, the present application includes at least one of the following beneficial technical effects:

[0026] 1. The push head and the positioning block cooperate with each other to clamp the entire electric tool shaft from both ends of the electric tool shaft, so that the outer circumferential side wall of the electric tool shaft is completely exposed to the air, which is convenient for the milling cutter on the machine tool to process the electric tool shaft and improves the accuracy of the through hole processing on the electric tool shaft;

[0027] 2. The provision of the abutting block enables the operator to use the abutting block as a positioning point to move the electric tool shaft towards the positioning block, which is convenient for one end of the electric tool shaft to be clamped on the limiting post and improves the installation efficiency of the electric tool shaft;

[0028] 3. The provision of the mounting seat enables the entire operating table to rotate circumferentially around the axial center of the electric tool shaft under the control of the mounting seat, so as to rotate the avoidance hole on the operating table to the upper side or to face the milling cutter, which is convenient for the machine tool to process. Description of the Drawings

[0029] Figure 1 It is a schematic structural diagram of the electric tool shaft in the embodiment of the present application.

[0030] Figure 2 It is an overall structure diagram of a fixture for machining the electric tool shaft in the embodiment of the present application.

[0031] Figure 3 It is a partial structure diagram of a fixture for machining the electric tool shaft in the embodiment of the present application.

[0032] Figure 4 It is a partial exploded view of a fixture for machining the electric tool shaft in the embodiment of the present application.

[0033] Explanation of reference numerals: 1. Mounting seat; 2. Operating table; 21. Positioning block; 211. First mounting hole; 212. Limit post; 2121. Second mounting hole; 2122. Limiting surface; 22. Oil cylinder; 221. Pusher head; 2211. Guide surface; 23. Contact block; 24. Hoisting ring; 25. Avoidance hole; 3. Electric tool shaft; 31. Through hole; 32. Connecting block; 321. Passing hole; 322. Embedding groove; 33. Spline hole. Detailed implementation manners

[0034] The following will further describe the present application in detail Figures 1-4 in conjunction with the attached drawings.

[0035] The embodiment of the present application discloses a fixture for machining an electric tool shaft. Referring to Figure 1 and Figure 2 , a fixture for machining an electric tool shaft includes a mounting seat 1 and an operating table 2. The number of mounting seats 1 is two and they are respectively located at both ends of the operating table 2. The two ends of the operating table 2 are rotatably connected to the two mounting seats 1, so that the operating table 2 can rotate circumferentially around the line between the two mounting seats 1 as the axis.

[0036] Referring to Figure 1 and Figure 2 , a positioning block 21 is fixedly connected to the operating table 2. Two oil cylinders 22 are fixedly connected to the operating table 2. The piston rods of the two oil cylinders 22 all move towards the positioning block 21 and are respectively located on two opposite sides of the positioning block 21 in a one-to-one correspondence. A pusher head 221 is fixedly connected to the piston rod of the oil cylinder 22. Part of the pusher head 221 extends into the passing hole 321 on the electric tool shaft 3 and pushes the electric tool shaft 3 to move until it abuts against the positioning block 21, so that the pusher head 221 and the positioning block 21 cooperate with each other to clamp the electric tool shaft 3 from both ends of the electric tool shaft 3.

[0037] Combined with Figure 3, a guiding surface 2211 is provided on the outer circumferential side wall of one end of the pusher head 221 close to the positioning block 21. The guiding surface 2211 can guide the pusher head 221 to extend into the through hole 321 of the electric tool shaft 3, thereby reducing the wear of the inner circumferential side wall of the pusher head 221 on the electric tool shaft 3.

[0038] Combined with Figure 3 , a butting block 23 is connected to one side of the operating table 2 close to the oil cylinder 22. The butting block 23 is fixedly connected to the operating table 2 by screws. The butting block 23 is located between the pusher head 221 and the operating table 2. The outer side wall of the connecting block 32 on the electric tool shaft 3 abuts against the side of the butting block 23 away from the operating table 2. During the preliminary installation of the electric tool shaft 3, the butting block 23 can support the electric tool shaft 3.

[0039] Refer to Figure 2 and Figure 3 , a lifting ring 24 is fixedly connected to one side of the operating table 2 close to the positioning block 21. The number of lifting rings 24 is four and they are respectively located at the four corners of the operating table 2 one by one, which is convenient for the lifting equipment to move the entire operating table 2.

[0040] Refer to Figure 3 and Figure 4 , a limiting post 212 is penetrated through the positioning block 21, and both ends of the limiting post 212 extend to the outside of the two opposite side walls of the positioning block 21. When the electric tool shaft 3 is clamped between the pusher head 221 and the positioning block 21, the limiting post 212 extending outside the positioning block 21 is embedded in the spline hole 33 on the electric tool shaft 3. The limiting post 212, the electric tool shaft 3 and the pusher head 221 are all coaxially arranged. When the staff installs the electric tool shaft 3, first align the butting block 23 and snap one end of the electric tool shaft 3 onto the limiting post 212, thereby further positioning and supporting the electric tool shaft 3.

[0041] Refer to Figure 3 and Figure 4 , a first mounting hole 211 for screw thread fit is provided on the positioning block 21, and a second mounting hole 2121 communicating with the first mounting hole 211 and for screw thread fit is provided on the limiting post 212. When the staff adjusts the length of the limiting post 212 extending outside the positioning block 21, the limiting post 212 of the positioning block 21 can be fixed by screwing the screw through the first mounting hole 211 and the second mounting hole 2121.

[0042] Combined with Figure 3 and Figure 4, a plurality of limiting surfaces 2122 are formed on the circumferential side wall of the limiting column 212. The plurality of limiting surfaces 2122 cooperate with each other to form a hexagonal shape. When the limiting column 212 is clamped in the spline hole 33 of the electric tool shaft 3, the limiting surfaces 2122 can cooperate with the spline hole 33 to perform limiting. One side of the limiting surface 2122 close to the push head 221 is inclined, so that the cross-sectional diameter of the end of the limiting column 212 is smaller than the cross-sectional diameter of the middle section of the limiting column 212, thereby facilitating the insertion of the limiting column 212 into the spline hole 33 of the electric tool shaft 3.

[0043] Referring to Figure 4 , an avoidance hole 25 is formed in the operating table 2. The avoidance hole 25 is located between the abutting block 23 and the positioning block 21, so as to facilitate the milling cutter to extend into and machine one side of the electric tool shaft 3. In the embodiment of the present application, the number of the oil cylinders 22, the push heads 221 and the abutting blocks 23 is two, and they are arranged oppositely along the axial direction of the limiting column 212 and centered on the positioning block 21, so that two electric tool shafts 3 can be clamped on the operating table 2 for machining at the same time.

[0044] The implementation principle of a fixture for machining an electric tool shaft in the embodiment of the present application is as follows: The staff positions with the abutting block 23, pushes the semi-finished electric tool shaft 3 towards the positioning block 21, so that one end of the electric tool shaft 3 is clamped on the limiting column 212, and then the staff releases the hand. The connecting block 32 on the electric tool shaft 3 supports on the abutting block 23. At this time, the machine tool is operated, and the oil cylinder 22 drives the push head 221 to extend into the through hole 321 of the electric tool shaft 3, so that the two cooperate to clamp the electric tool shaft 3. Then the milling cutter machines two through holes 31 in the electric tool shaft 3, and then the operating table 2 rotates, and the milling cutter machines the other side of the electric tool shaft 3 through the avoidance hole 25, thereby completing the machining.

[0045] The above are all the preferred embodiments of the present application, and the protection scope of the present application is not limited thereby. Therefore, all equivalent changes made according to the structure, shape and principle of the present application should be covered within the protection scope of the present application.

Claims

1. A fixture for machining a power tool shaft, characterized in that: The invention comprises an operating table (2), wherein a positioning block (21) is fixedly connected to the operating table (2), a limiting column (212) is provided on the positioning block (21) and extends into a flower hole (33) of an electric tool shaft (3), an oil cylinder (22) is fixedly connected to the operating table (2), an end of a piston rod of the oil cylinder (22) close to the limiting column (212) is fixedly connected to a push head (221) and extends into a through hole (321) of the electric tool shaft (3), and the push head (221) and the positioning block (21) cooperate with each other to clamp the electric tool shaft (3).

2. A fixture for machining a power tool shaft according to claim 1, characterized in that: The limiting column (212) is slidably connected inside the positioning block (21) and extends outside the opposite side walls of the positioning block (21).

3. A fixture for machining a shaft of an electric tool according to claim 2, characterized in that: The positioning block (21) is provided with a first mounting hole (211) for screw thread engagement, and the limiting column (212) is provided with a second mounting hole (2121) which is in communication with the first mounting hole (211) and for screw thread engagement.

4. A fixture for machining a power tool shaft according to claim 3, characterized in that: A plurality of limiting surfaces (2122) are provided on the circumferential side wall of the limiting column (212).

5. The fixture for machining a power tool shaft according to claim 1, characterized in that: A guide surface (2211) is provided on the outer circumferential side wall of one end of the push head (221) close to the limiting column (212).

6. A fixture for machining a shaft of an electric tool according to claim 5, characterized in that: An abutment block (23) is fixedly connected to the operating table (2), and the abutment block (23) is located between the pusher head (221) and the operating table (2).

7. The fixture for machining a shaft of an electric tool according to claim 1, characterized in that: The operating table (2) is provided with an avoidance hole (25) for the milling cutter to extend into.

8. The fixture for machining a shaft of an electric tool according to claim 6, characterized in that: The oil cylinder (22), the push head (221) and the abutment block (23) are two in number and are located on opposite sides of the positioning block (21) in a one-to-one correspondence.

9. The fixture for machining a shaft of an electric tool according to claim 1, characterized in that: It also comprises a mounting seat (1), and an end portion of the operating table (2) is rotatably connected to the mounting seat (1).

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