Positioning tool for boring transmission shaft shell

Abstract

The utility model discloses a positioning tool for boring a transmission shaft shell. The positioning tool comprises a bottom plate, a plurality of cushion blocks fixedly arranged on the bottom plate and used for supporting the bottom of a lower cover, a plurality of supporting columns fixedly arranged on the bottom plate and used for supporting the outer edge plane of a bolt hole of the lower cover, and an automatic clamp fixedly arranged on the bottom plate and used for pressing an upper cover from top to bottom. The boring fixture is reasonable in structural design, can improve the clamping efficiency and ensure the stability of a clamped workpiece, is suitable for boring a bearing hole in a transmission shaft shell of an electric tricycle, and is used for clamping the transmission shaft shell 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 boring processing of a transmission shaft housing. Background Art

[0002] Forged, cast or drilled holes of products usually need to be further bored on a lathe to expand the hole diameter, improve accuracy, reduce surface roughness or correct the deviation of the original hole axis. For example, when producing the transmission shaft housing (hereinafter referred to as aluminum parts) of electric tricycles, the aluminum parts need to be clamped on a lathe to bore the bearing holes. Since the aluminum parts are special-shaped parts, special positioning tooling is required when clamping them on the lathe.

[0003] In the prior art, the 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. The 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. 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 boring a transmission shaft housing, 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 boring a transmission shaft housing, comprising a base plate, a plurality of pads fixed on the base plate for supporting the bottom of a lower cover, a plurality of support columns fixed on the base plate for supporting the outer edge plane of the bolt holes of the lower cover, and an automatic clamp fixed on the base plate for pressing the upper cover from top to bottom.

[0008] As a limitation of the present invention, the automatic clamp includes two first clamps arranged corresponding to the M8 bolt holes at the front end of the upper cover and two second clamps arranged corresponding to the M8 bolt holes at the rear end of the upper cover.

[0009] As a further limitation of the present invention, two support columns are fixed on the bottom plate, and the positions correspond to the two M8 bolt holes at the front end of the lower cover.

[0010] As a further limitation of the present invention, the distribution positions of the plurality of pads on the bottom plate correspond to the edge positions of the reinforcing ribs of the lower cover.

[0011] As another limitation of the present invention, the pad block has two fixed positions on the bottom plate corresponding to the working end of the second clamp.

[0012] As a further limitation of the present invention, the pad is detachably mounted on the base plate by bolts.

[0013] As a third limitation of the present invention, it also includes a positioning column fixed on the bottom plate for supporting the side of the reinforcing rib of the lower cover.

[0014] As a further limitation of the present invention, the positioning column includes a mounting plate fixed on the bottom plate and a threaded column threadedly assembled on the mounting plate, and an end of the threaded column is used to abut against the side surface of the reinforcing rib of the lower cover.

[0015] As another limitation of the present invention, it further comprises a positioning block fixedly mounted on the bottom plate, wherein the positioning block is provided with a positioning groove for a single reinforcing rib of the lower cover to extend into.

[0016] Due to the adoption of the above technical solution, the utility model has the following beneficial effects compared with the prior art:

[0017] (1) The utility model is a structural improvement on the positioning fixture of the transmission shaft housing. The biggest improvement is that an automatic clamp (preferably a lever-type hydraulic cylinder) is used to replace the manual quick clamp to press down and fix the transmission shaft housing (hereinafter referred to as the workpiece). There is no need for workers to manually operate the clamp, and the overall operation is simpler and more convenient, which can effectively improve the clamping efficiency. In addition, the utility model also uses pads and support columns to support the bottom of the workpiece. Through reasonable position distribution, the parts of the workpiece with flatness are supported in a targeted manner (such as the bottom plane of the reinforcing rib and the outer edge plane of the bolt hole). Compared with the method of opening a positioning groove on the bottom plate, the utility model is more reasonably designed, with a larger contact support area with the workpiece, and thus the stability of the workpiece is better after clamping.

[0018] (2) In the present invention, the support column corresponds to the first clamp position up and down. When the first clamp presses the workpiece from top to bottom, the support column can support the workpiece directly below. In the present invention, two cushion blocks correspond to the second clamp position up and down. When the second clamp presses the workpiece from top to bottom, the corresponding two cushion blocks can support the workpiece directly below. Therefore, the present invention can achieve stable clamping and fixing of the workpiece.

[0019] (3) The positioning column provided in the utility model can abut against the side of the reinforcing rib of the lower cover of the workpiece to prevent the position of the workpiece from moving after clamping. In addition, the positioning column includes a mounting plate and a threaded column threadedly assembled on the mounting plate. The end position can be adjusted by twisting the threaded column so that it can better abut against the side of the reinforcing rib of the lower cover of the workpiece.

[0020] (4) The positioning block provided in the present invention can cooperate with the positioning column to prevent the position of the workpiece after clamping from moving by limiting the position of the reinforcing rib.

[0021] 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 boring the bearing holes of the transmission shaft housing of an electric tricycle, and is used to realize the clamping of the transmission shaft housing on a lathe. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The present invention is described in further detail below in conjunction with the accompanying drawings and specific embodiments.

[0023] Figure 1 It is a schematic diagram of the structure of an embodiment of the utility model;

[0024] Figure 2 It is a schematic diagram of the structure of the transmission shaft housing;

[0025] Figure 3 It is a schematic diagram of the structure of the transmission shaft housing from another angle;

[0026] Figure 4 It is a schematic diagram of the structure of the transmission shaft housing being clamped on the embodiment of the utility model;

[0027] In the figure: 1, bottom plate; 2, cushion block; 3, support column; 4, first clamp; 5, second clamp; 6, mounting plate; 7, threaded column; 8, positioning block; 9, transmission shaft housing; 10, upper cover; 11, lower cover. DETAILED DESCRIPTION

[0028] 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.

[0029] Before describing this embodiment, it is necessary to combine Figure 2 and Figure 3 The structure of the transmission shaft housing 9 is described in advance. The transmission shaft housing 9 includes an upper cover 10 and a lower cover 11. The upper cover 10 and the lower cover 11 are buckled together to form a bearing hole in the middle. Figure 2 and Figure 3 In the figure, “end A” is the front end of the transmission shaft housing 9, and “end B” is the rear end of the transmission shaft housing 9. Figure 2In the figure, "C" is the M8 bolt hole at the front end of the upper cover 10, and "D" is the M8 bolt hole at the rear end of the upper cover 10; Figure 3 In the figure, "Part E" is the M8 bolt hole at the front end of the lower cover 11, "Part F" is the reinforcing rib of the lower cover 11, "Part G" is a single reinforcing rib of the lower cover 11 for extending into the positioning groove of the positioning block 8, and "Part H" is the side of the reinforcing rib of the lower cover 11.

[0030] This embodiment discloses a positioning tool used when boring the bearing hole of the transmission shaft housing 9 of the electric tricycle, such as Figure 1 As shown, this embodiment includes a base plate 1 and a cushion block 2, a support column 3 and an automatic clamp fixed on the base plate 1.

[0031] The bottom plate 1 is a rectangular or square stainless steel plate for assembly on a lathe. It should be noted that when the transmission shaft housing 9 is clamped, the front end of the bottom plate 1 corresponds to the front end of the transmission shaft housing 9, and the rear end of the bottom plate 1 corresponds to the rear end of the transmission shaft housing 9.

[0032] A plurality of pads 2 are fixedly provided on the bottom plate 1, and are used to support the bottom of the transmission shaft housing 9. Figure 1 As shown, the pad 2 includes a base and a cylindrical gasket fixed on the base, wherein the base is detachably mounted on the bottom plate 1 by means of hexagon socket bolts. In this embodiment, there are 4 pads 2, and their distribution positions correspond to the edge positions of the reinforcing ribs of the lower cover 11. When the transmission shaft housing 9 is placed on the bottom plate 1, the top surface of the cylindrical gasket of the pad 2 contacts the edge of the reinforcing rib of the lower cover 11. Furthermore, when the transmission shaft housing 9 is placed on the bottom plate 1, in this embodiment, there are 2 pads 2 located directly below the "D portion" of the upper cover 10.

[0033] A plurality of support columns 3 are fixedly provided on the bottom plate 1 and are located at the front end of the bottom plate 1. They are used to support the outer edge plane of the bolt holes of the lower cover 11. In this embodiment, there are two support columns 3, and their distribution positions correspond to the two M8 bolt holes at the front end of the lower cover 11, namely, the "E portion". Figure 1 As shown, the bottom diameter of the support column 3 is large, and the fixing stability on the bottom plate 1 is good; the top diameter is small, which is adapted to the size of the outer edge plane of the M8 bolt hole. When the transmission shaft housing 9 is placed on the bottom plate 1, the top surface of the support column 3 contacts the outer edge plane of the two M8 bolt holes at the front end of the lower cover 11.

[0034] The automatic clamp is used to press the upper cover 10 from top to bottom. Figure 1As shown, the automatic clamp in this embodiment includes two first clamps 4 and two second clamps 5 fixed on the base plate 1, and the first clamps 4 and the second clamps 5 are lever-type hydraulic cylinders in the prior art. Specifically, the two first clamps 4 correspond to the M8 bolt holes (i.e., C part) at the front end of the upper cover 10, and the two second clamps 5 correspond to the M8 bolt holes (i.e., D part) at the rear end of the upper cover 10. When the transmission shaft housing 9 is placed on the base plate 1, the working end of the first clamp 4 presses on the M8 bolt hole at the front end of the upper cover 10, and the working end of the second clamp 5 presses on the M8 bolt hole at the rear end of the upper cover 10.

[0035] Furthermore, the bottom plate 1 in this embodiment is also fixed with a positioning column and a positioning block 8, which are used to support and limit the side of the transmission shaft housing 9 to prevent the transmission shaft housing 9 from moving after clamping. Figure 1 As shown, the positioning column is located between the first clamp 4 and the second clamp 5, and includes a mounting plate 6 fixed on the bottom plate 1 and a threaded column 7 assembled on the mounting plate 6 by threads. When in use, the protruding length of the end of the threaded column 7 can be adjusted by twisting the threaded column 7. When the transmission shaft housing 9 is placed on the bottom plate 1, the end of the threaded column 7 abuts against the side of the reinforcing rib of the lower cover 11, i.e., the "H part". The positioning block 8 is fixed in the middle of the bottom plate 1, located between the two second clamps 5, as shown in FIG. Figure 1 As shown, a rectangular positioning groove is provided on the top of the positioning block 8. When the transmission shaft housing 9 is placed on the bottom plate 1, a single reinforcing rib (i.e., "G portion") of the lower cover 11 is clamped in the positioning groove.

[0036] When using this embodiment, first assemble this embodiment on a lathe, and connect the first clamp 4 and the second clamp 5 to the oil pipe of the hydraulic station of the lathe; then put the transmission shaft housing 9 to be bored, so that the outer edge planes of the two M8 bolt holes at the front end of the lower cover 11 are supported by the two support columns 3, the edges of the reinforcing ribs of the lower cover 11 are supported by the cushion block 2, the side surfaces of the reinforcing ribs of the lower cover 11 are supported by the ends of the threaded columns 7, and the single reinforcing rib (G portion) of the lower cover 11 is clamped in the positioning groove of the positioning block 8; finally, by controlling the hydraulic station of the lathe, the first clamp 4 and the second clamp 5 are pressed down to clamp and fix the transmission shaft housing 9.

[0037] It should be noted that after clamping, the working end of the first clamp 4 corresponds to the support column 3 up and down, and the two cooperate to clamp the M8 bolt hole at the front end; the working end of the second clamp 5 corresponds to the two pads 2 located directly below the "D part" up and down, and the two cooperate to clamp the M8 bolt hole at the rear end.

[0038] After the boring process is completed, the first clamp 4 and the second clamp 5 are returned to their original positions by controlling the hydraulic station of the lathe, so that the transmission shaft housing 9 can be removed.

[0039] Repeat the above steps to perform lathe processing on the next transmission shaft housing 9.

[0040] 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 boring a transmission shaft housing, characterized in that: It includes a bottom plate, a plurality of pads fixed on the bottom plate for supporting the bottom of the lower cover, a plurality of support columns fixed on the bottom plate for supporting the outer edge plane of the bolt holes of the lower cover, and an automatic clamp fixed on the bottom plate for pressing the upper cover from top to bottom.

2. The positioning tool for boring a transmission shaft housing according to claim 1, characterized in that: The automatic clamp comprises two first clamps arranged corresponding to the M8 bolt holes at the front end of the upper cover and two second clamps arranged corresponding to the M8 bolt holes at the rear end of the upper cover.

3. The positioning tool for boring a transmission shaft housing according to claim 2, characterized in that: There are two support columns fixed on the bottom plate, and their positions correspond to the two M8 bolt holes at the front end of the lower cover.

4. The positioning tool for boring a transmission shaft housing according to claim 2 or 3, characterized in that: The distribution positions of the plurality of pads on the bottom plate correspond to the edge positions of the reinforcing ribs of the lower cover.

5. The positioning tool for boring a transmission shaft housing according to claim 4, characterized in that: The pad block has two fixed positions on the bottom plate corresponding to the working end of the second clamp.

6. The positioning tool for boring a transmission shaft housing according to claim 5, characterized in that: The spacer block is detachably mounted on the base plate by bolts.

7. The positioning tool for boring a transmission shaft housing according to any one of claims 1-3, 5-6, characterized in that: It also includes a positioning column fixed on the bottom plate and used for supporting the side surface of the reinforcing rib of the lower cover.

8. The positioning tool for boring a transmission shaft housing according to claim 7, characterized in that: The positioning column comprises a mounting plate fixed on the bottom plate and a threaded column threadedly assembled on the mounting plate, and the end of the threaded column is used to abut against the side surface of the reinforcing rib of the lower cover.

9. The positioning tool for boring a transmission shaft housing according to any one of claims 1-3, 5-6, and 8, characterized in that: The utility model also comprises a positioning block fixedly arranged on the bottom plate, and a positioning groove for a single reinforcing rib of the lower cover to extend into is arranged on the positioning block.

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