Positioning tool for lathe machining of lower cover of transmission shaft

Abstract

The utility model discloses a positioning tool for lathe machining of a lower cover of a transmission shaft. Comprising a bottom plate, a plurality of cushion blocks fixedly arranged on the bottom plate and used for supporting the bottom of the transmission shaft lower cover so that the assembling face of the transmission shaft lower cover can be parallel to the surface of the bottom plate, a clamp assembly fixedly arranged on the bottom plate and used for clamping the transmission shaft lower cover from top to bottom, and a plurality of positioning columns fixedly arranged on the bottom plate and used for abutting against the side face of the transmission shaft lower cover. The clamping device is reasonable in structural design, can improve the clamping efficiency and ensure the stability of a clamped workpiece, is suitable for being used when the transmission shaft lower cover of the electric tricycle is subjected to lathe machining, and is used for clamping and fixing the transmission shaft lower cover on a lathe.

Description

Technical Field

[0001] The utility model belongs to the technical field of lathe processing, and relates to a tool fixture used in lathe processing, in particular to a positioning tool fixture for lathe processing of a transmission shaft lower cover. Background Art

[0002] After die-casting, products usually need to be processed on a lathe. For example, when producing the drive shaft housing (hereinafter referred to as aluminum parts) of electric tricycles, the aluminum parts demolded after die-casting will be assembled on a lathe for drilling, buckling and milling. Since such aluminum parts are special-shaped parts, special positioning tooling is required for lathe processing.

[0003] In the prior art, such aluminum parts are usually equipped with simple tooling, including a base plate and a plurality of manual quick clamps. The base plate is provided with a positioning groove adapted to the shape of the aluminum part; the quick clamp is fixed on the base plate and is used to clamp the aluminum part from top to bottom and then position it in the positioning groove of the base plate. This simple tooling often has the following problems when used:

[0004] One is the low clamping efficiency. After the worker puts the aluminum part into the positioning slot, he needs to manually operate the quick clamp to clamp the aluminum part. After the lathe processing is completed, he needs to manually operate the quick clamp to loosen the aluminum part. The whole process is time-consuming and labor-intensive, resulting in low clamping efficiency.

[0005] The second is the poor stability of clamping. Manual operation easily leads to the situation that the quick clamp is not fixed in place, resulting in poor stability of the workpiece, and the workpiece shakes during subsequent lathe processing, which is prone to processing deviation. Utility Model Content

[0006] In order to solve the above deficiencies in the prior art, the utility model aims to provide a positioning tool for lathe processing of a transmission shaft lower cover, so as to achieve the purpose of fast clamping and good stability.

[0007] To achieve the above-mentioned purpose, the technical solution adopted by the utility model is as follows: a positioning tool for lathe processing of a transmission shaft lower cover, comprising a base plate, a plurality of pads fixed on the base plate for supporting the bottom of the transmission shaft lower cover so that the assembly surface of the transmission shaft lower cover is parallel to the surface of the base plate, a clamp assembly fixed on the base plate for clamping the transmission shaft lower cover from top to bottom, and a plurality of positioning columns fixed on the base plate for resisting the side surfaces of the transmission shaft lower cover.

[0008] As a limitation of the present invention, both ends of the base plate are provided with open grooves to achieve positioning and assembly on a lathe.

[0009] As another limitation of the present invention, the distribution positions of the plurality of pads on the bottom plate correspond to the positions of the reinforcing ribs on the lower cover of the transmission shaft.

[0010] As a further limitation of the present invention, the clamp assembly includes a first clamp fixed at the front end of the base plate for clamping the bearing hole of the lower cover of the transmission shaft, and a second clamp and a third clamp fixed at the rear end of the base plate for clamping both sides of the lower cover of the transmission shaft.

[0011] As a further limitation of the present invention, the first clamp, the second clamp and the third clamp are all lever-type hydraulic cylinders.

[0012] As a third limitation of the present utility model, a first mounting seat, a second mounting seat and a third mounting seat are fixedly provided at the front end of the bottom plate; the first mounting seat and the second mounting seat are arranged side by side and both face the front end surface of the reinforcing rib on the lower cover of the transmission shaft; the third mounting seat is located on one side of the first mounting seat and faces the side surface of the reinforcing rib on the lower cover of the transmission shaft;

[0013] The positioning column is a threaded column, three of which are correspondingly arranged and threadedly assembled on the first mounting seat, the second mounting seat and the third mounting seat respectively, and the end of the positioning column is against the front end face or side face of the reinforcing rib on the lower cover of the transmission shaft.

[0014] As a further limitation of the present invention, top columns are provided on the top surfaces of the first mounting seat and the second mounting seat, and the distribution positions of the top columns correspond to the positions of the bolt holes at the front end of the lower cover of the transmission shaft.

[0015] Due to the adoption of the above technical solution, the utility model has the following beneficial effects compared with the prior art:

[0016] The utility model is a structural improvement on the positioning tooling of the lower cover of the transmission shaft. The biggest improvement is that a lever-type hydraulic cylinder is used to replace the quick clamp to clamp and fix the lower cover of the transmission shaft, thereby realizing a simpler, more labor-saving, faster and more stable clamping of the lower cover of the transmission shaft before lathe processing, which can make the clamping efficiency higher and the clamping stability better. In addition, the utility model also uses a pad and a positioning column to limit the lower cover of the transmission shaft, and the distribution position is reasonable. Most of them are used to support or limit the parts of the lower cover of the transmission shaft that have flatness (such as the bottom plane and side plane of the reinforcing rib of the lower cover of the transmission shaft). Compared with the method of opening a positioning groove on the bottom plate, the utility model has a reasonable design, a large contact area with the lower cover of the transmission shaft, and thus good support stability, and the lower cover of the transmission shaft can be quickly put in place by pushing it in from one side.

[0017] To sum up, the utility model has a reasonable structural design, can improve the clamping efficiency and ensure the stability of the workpiece after clamping, is suitable for use in lathe processing of the lower cover of the transmission shaft of an electric tricycle, and is used to realize the clamping and fixation of the lower cover of the transmission shaft on a lathe. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The present invention is described in further detail below in conjunction with the accompanying drawings and specific embodiments.

[0019] Figure 1 It is a schematic diagram of the structure of an embodiment of the utility model;

[0020] Figure 2 It is a structural schematic diagram of the lower cover of the transmission shaft;

[0021] Figure 3 It is a schematic diagram of the structure of the transmission shaft lower cover from another angle;

[0022] Figure 4 It is a structural schematic diagram of the transmission shaft lower cover being clamped on an embodiment of the utility model;

[0023] In the figure: 1. bottom plate; 2. opening groove; 3. pad; 4. support column; 5. first clamp; 6. second clamp; 7. third clamp; 8. positioning column; 9. first mounting seat; 10. second mounting seat; 11. third mounting seat; 12. lower cover of transmission shaft; 13. reinforcing rib; 14. bearing hole; 15. top column. DETAILED DESCRIPTION

[0024] The preferred embodiments of the present invention are described below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described herein are only used to illustrate and understand the present invention, and are not used to limit the present invention.

[0025] Before describing this embodiment, it is necessary to combine Figures 2 to 3 Various parts of the transmission shaft lower cover 12 defined in this embodiment are described in advance. Figures 2 to 3 In the figure, "end A" is the front end of the transmission shaft lower cover 12, and "end B" is the rear end of the transmission shaft lower cover 12. Figure 2 As shown, the outer surface of the transmission shaft lower cover 12 is provided with reinforcing ribs 13; Figure 3 As shown, the inner side of the transmission shaft lower cover 12 has a bearing hole 14. Figure 2 As shown, the bottom of the reinforcing rib 13 of the transmission shaft lower cover 12 has a high flatness. Figure 2 In the figure, "C surface" is the front end surface of the reinforcing rib 13, and "E surface" is a plane at the bottom of the transmission shaft lower cover 12; Figure 3 In the figure, “D surface” is the side surface of the reinforcing rib 13.

[0026] This embodiment discloses a positioning tool used when lathe processing the lower cover 12 of the electric tricycle transmission shaft. Figure 1 As shown, this embodiment includes a base plate 1 and a cushion block 3 , a clamp assembly and a positioning column 8 fixed on the base plate 1 .

[0027] The bottom plate 1 is a rectangular or square stainless steel plate, with two opening slots 2 at each end to achieve positioning and assembly on a lathe. Of course, the number of the opening slots 2 can also be adjusted adaptively according to actual conditions. It should be noted here that after the transmission shaft lower cover 12 is placed, the front end of the bottom plate 1 corresponds to the front end of the transmission shaft lower cover 12, and the rear end of the bottom plate 1 corresponds to the rear end of the transmission shaft lower cover 12.

[0028] A plurality of pads 3 are fixedly provided on the bottom plate 1, and they are used to support the bottom of the transmission shaft lower cover 12, so that when the transmission shaft lower cover 12 is placed on the bottom plate 1, the assembly surface of the transmission shaft lower cover 12 can be parallel to the upper surface of the bottom plate 1. Figure 1 and Figure 4 As shown, in this embodiment, there are 4 pads 3, all of which are detachably fixed to the bottom plate 1 by hexagon socket bolts. The distribution positions of 3 of the pads 3 on the bottom plate 1 correspond to the positions of the reinforcing ribs 13 on the lower cover 12 of the transmission shaft. When the lower cover 12 of the transmission shaft is placed on the bottom plate 1, the bottom plane of the reinforcing ribs 13 contacts the above 3 pads 3; the fixed position of 1 of the pads 3 on the bottom plate 1 corresponds to the position of the "E surface" on the lower cover 12 of the transmission shaft. When the lower cover 12 of the transmission shaft is placed on the bottom plate 1, the "E surface" of the lower cover 12 of the transmission shaft contacts the pad 3.

[0029] On the bottom plate 1 of the present embodiment, a support column 4 is further provided on one side of the cushion block 3 at the position corresponding to the “E surface”, so as to cooperate with the cushion block 3 to support the “E surface” of the transmission shaft lower cover 12 .

[0030] The clamp assembly is used to clamp the transmission shaft lower cover 12 from top to bottom. Figure 1 As shown, the clamp assembly in this embodiment includes a first clamp 5, a second clamp 6 and a third clamp 7, and the first clamp 5, the second clamp 6 and the third clamp 7 are all lever-type hydraulic cylinders in the prior art. Figure 4 As shown, the first clamp 5 is fixed at the front end of the base plate 1, and is used to clamp the bearing hole 14 of the transmission shaft lower cover 12 from top to bottom; the second clamp 6 and the third clamp 7 are fixed at the rear end of the base plate 1, and are used to clamp the two sides of the rear end of the transmission shaft lower cover 12 from top to bottom.

[0031] A plurality of positioning posts 8 are fixed on the bottom plate 1, and are used to abut against the side of the transmission shaft lower cover 12 to limit the front, back, left, and right positions of the transmission shaft lower cover 12. In this embodiment, a total of three positioning posts 8 are provided, all of which are threaded posts and are fixed on the bottom plate 1 through a mounting seat. Figure 1As shown, the front end of the bottom plate 1 is fixedly provided with a first mounting seat 9, a second mounting seat 10 and a third mounting seat 11. The first mounting seat 9 and the second mounting seat 10 are arranged side by side, and when the transmission shaft lower cover 12 is placed on the bottom plate 1, the first mounting seat 9 and the second mounting seat 10 are both facing the front end surface of the reinforcing rib 13 on the transmission shaft lower cover 12; the third mounting seat 11 is located on one side of the first mounting seat 9, and when the transmission shaft lower cover 12 is placed on the bottom plate 1, the third mounting seat 11 faces the side of the reinforcing rib 13 on the transmission shaft lower cover 12.

[0032] Furthermore, the three positioning columns 8 are respectively assembled on the first mounting seat 9, the second mounting seat 10 and the third mounting seat 11 through threads, wherein the ends of the positioning columns 8 assembled on the first mounting seat 9 and the second mounting seat 10 abut against the front end surface of the reinforcing rib 13, and the ends of the positioning columns 8 assembled on the third mounting seat 11 abut against the side surface of the reinforcing rib 13.

[0033] like Figure 1 As shown, in this embodiment, top columns 15 are arranged on the top surfaces of the first mounting seat 9 and the second mounting seat 10. The distribution positions of the two top columns 15 correspond to the bolt hole positions at the front end of the transmission shaft lower cover 12. When the transmission shaft lower cover 12 is placed on the bottom plate 1, the two top columns 15 respectively support the bolt hole positions at the front end of the transmission shaft lower cover 12. Figure 4 shown.

[0034] In this embodiment, the positioning column 8 is assembled on the mounting seat by threads, so that the position of the positioning column 8 can be adjusted to adapt to different sizes of the transmission shaft lower cover 12, ensuring that when the transmission shaft lower cover 12 is placed on the base plate 1, the end of the positioning column 8 can be against the transmission shaft lower cover 12.

[0035] When using this embodiment, first assemble this embodiment on a lathe, and connect the lever-type hydraulic cylinder to the oil pipe of the lathe hydraulic station; then place the transmission shaft lower cover 12 to be processed on the base plate 1 of this embodiment, and under the action of the cushion block 3 and the positioning column 8, the assembly surface of the transmission shaft lower cover 12 is parallel to the upper surface of the base plate 1; finally, by controlling the lathe hydraulic station, the lever-type hydraulic cylinder is pressed down to clamp and fix the transmission shaft lower cover 12.

[0036] After the lathe processing is completed, the lever-type hydraulic cylinder is lifted by controlling the lathe hydraulic station, the transmission shaft lower cover 12 is removed, and then the next transmission shaft lower cover 12 is replaced, and the above steps are repeated.

[0037] It should be noted that the above is only a preferred embodiment of the utility model and is not intended to limit the utility model. Although the utility model is described in detail with reference to the above embodiments, those skilled in the art can still modify the technical solutions recorded in the above embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A positioning tool for lathe processing of a transmission shaft lower cover, characterized in that: It includes a base plate, a plurality of pads fixed on the base plate for supporting the bottom of the transmission shaft lower cover so that the assembly surface of the transmission shaft lower cover is parallel to the surface of the base plate, a clamp assembly fixed on the base plate for clamping the transmission shaft lower cover from top to bottom, and a plurality of positioning columns fixed on the base plate for supporting the side of the transmission shaft lower cover.

2. The positioning tool for lathe processing of the lower cover of the transmission shaft according to claim 1 is characterized in that: Both ends of the bottom plate are provided with opening grooves to realize positioning and assembly on a lathe.

3. The positioning tool for lathe processing of the lower cover of the transmission shaft according to claim 1 or 2, characterized in that: The distribution positions of the plurality of cushion blocks on the bottom plate correspond to the positions of the reinforcing ribs on the lower cover of the transmission shaft.

4. The positioning tool for lathe processing of the lower cover of the transmission shaft according to claim 3 is characterized in that: The clamp assembly comprises a first clamp fixed at the front end of the base plate for clamping the bearing hole of the lower cover of the transmission shaft, and a second clamp and a third clamp fixed at the rear end of the base plate for clamping both sides of the lower cover of the transmission shaft.

5. The positioning tool for lathe processing of the lower cover of the transmission shaft according to claim 4 is characterized in that: The first clamp, the second clamp and the third clamp are all lever-type hydraulic cylinders.

6. The positioning tool for lathe processing of the lower cover of the transmission shaft according to any one of claims 1-2, 4-5, characterized in that: The front end of the bottom plate is fixedly provided with a first mounting seat, a second mounting seat and a third mounting seat; the first mounting seat and the second mounting seat are arranged side by side and both face the front end surface of the reinforcing rib on the lower cover of the transmission shaft; the third mounting seat is located on one side of the first mounting seat and faces the side surface of the reinforcing rib on the lower cover of the transmission shaft; The positioning column is a threaded column, three of which are correspondingly arranged and threadedly assembled on the first mounting seat, the second mounting seat and the third mounting seat respectively, and the end of the positioning column is against the front end face or side face of the reinforcing rib on the lower cover of the transmission shaft.

7. The positioning tool for lathe processing of the lower cover of the transmission shaft according to claim 6 is characterized in that: Top columns are arranged on the top surfaces of the first mounting seat and the second mounting seat, and the distribution positions of the top columns correspond to the positions of the bolt holes at the front end of the lower cover of the transmission shaft.

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