Positioning tool for lathe machining of transmission shaft upper cover

Abstract

The utility model discloses a positioning tool for lathe machining of an upper cover of a transmission shaft. The positioning tool comprises a bottom plate, a block-up block fixedly arranged on the bottom plate and an automatic clamp fixedly arranged on the bottom plate and located at the front end of the block-up block. A first support used for supporting the outer edge plane of a bolt hole of the transmission shaft upper cover and a second support used for supporting the bottom plane of the rear end of the transmission shaft upper cover are fixedly arranged on the heightening block. The first support is matched with the second support to enable the assembly surface of the transmission shaft upper cover to be parallel to the upper surface of the bottom plate; the working end of the automatic clamp faces the heightening block so as to be used for pressing the transmission shaft upper cover above the heightening block from top to bottom. 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 upper cover of the transmission shaft of the electric tricycle is subjected to lathe machining, and is used for clamping and fixing the upper cover of the transmission shaft 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 upper 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. 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 upper 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 upper cover, comprising a base plate, a padding block fixed on the base plate, and an automatic clamp fixed on the base plate and located at the front end of the padding block;

[0008] The said pad block is fixed with a first support for supporting the outer edge plane of the bolt hole of the transmission shaft upper cover and a second support for supporting the rear end bottom plane of the transmission shaft upper cover; the first support cooperates with the second support to make the assembly surface of the transmission shaft upper cover parallel to the upper surface of the bottom plate;

[0009] The working end of the automatic clamp faces the padding block so as to press the transmission shaft upper cover above the padding block from top to bottom.

[0010] As a limitation of the present utility model, the automatic clamp includes a first lifting member fixedly mounted on a bottom plate, a column threadedly mounted on the bottom plate and perpendicular to the bottom plate, and a pressure plate mounted on a power output end of the first lifting member;

[0011] The rear end of the pressure plate is hinged on the power output end of the first lifting member, the middle part is hinged on the top of the column through a connecting plate, and the front end is located above the front end of the pad block; the connecting plate is hinged to the middle part of the pressure plate.

[0012] As a further limitation of the present utility model, a first opening slot is provided at the front end of the pressing plate, and a movable plate is rotatably mounted in the first opening slot;

[0013] The thickness of the movable plate is smaller than that of the pressing plate, and both ends of the movable plate are provided with protrusions perpendicular to the surface of the movable plate; the protrusions face the padding block.

[0014] As another limitation of the present invention, the first support includes a plurality of support columns for supporting the outer edge plane of the M8 bolt holes of the upper cover of the transmission shaft and a plurality of second lifting members for supporting the outer edge plane of the M6 ​​bolt holes of the upper cover of the transmission shaft.

[0015] As a further limitation of the present invention, the power output end of the second lifting member is in a truncated cone shape, and the diameter of the top surface is smaller than the diameter of the M6 ​​bolt hole.

[0016] As a third limitation of the present invention, the second support includes a plurality of third lifting members for supporting the edge of the rear end bottom plane of the transmission shaft upper cover.

[0017] As a further limitation of the present invention, both ends of the bottom plate are provided with second opening grooves to achieve positioning and assembly on a lathe.

[0018] Due to the adoption of the above technical solution, the utility model has the following beneficial effects compared with the prior art:

[0019] (1) The utility model is a structural improvement on the positioning tooling of the transmission shaft upper cover. The biggest improvement is that the support column, the second lifting member and the third lifting member are used to support the bottom of the transmission shaft upper cover (hereinafter referred to as the workpiece), and the automatic clamp is used to press the workpiece from top to bottom, without the need for workers to manually operate the clamp. Compared with the clamping method of "quick clamp + positioning groove" in the prior art, the utility model is simpler and more convenient to operate, and the clamping efficiency is higher. In addition, the support column, the second lifting member and the third lifting member in the utility model are reasonably distributed in position, and are mostly used to support the parts of the workpiece that have flatness and good load-bearing performance (such as the bottom plane of the rear end and the bolt holes with uniform distribution in position), so that the workpiece is more stable after clamping.

[0020] (2) The column in the automatic clamp of the utility model is assembled on the base plate by means of threads. In actual use, the installation height can be adjusted by adjusting the depth of the column screwed into the base plate, so that the pressure plate can better press the workpiece.

[0021] (3) Both ends of the movable plate in the automatic clamp of the utility model are provided with protrusions, which can limit the workpiece to prevent it from shifting forward and backward when the workpiece is pressed. In addition, the movable plate is assembled in the first opening groove at the front end of the pressing plate, which can strengthen the structural strength of the front end of the pressing plate to a certain extent and reduce the probability of deformation. In addition, the rotating method is adopted, which can also avoid the problem of difficulty in loading and unloading caused by the protrusions at both ends interfering with the workpiece when loading and unloading the workpiece.

[0022] (4) In the present invention, the power output end of the second lifting member is in the shape of a truncated cone with a top diameter smaller than that of the M6 ​​bolt hole. When the second lifting member is raised to support the workpiece, the top of the power output end can extend into the corresponding bolt hole, so that the workpiece can be supported and limited at the same time.

[0023] 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 transmission shaft cover of an electric tricycle, and is used to realize the clamping and fixation of the transmission shaft cover on a lathe. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The present invention is described in further detail below in conjunction with the accompanying drawings and specific embodiments.

[0025] Figure 1 It is a schematic diagram of the structure of an embodiment of the utility model;

[0026] Figure 2 It is a structural schematic diagram of another angle of the embodiment of the utility model;

[0027] Figure 3 It is a schematic diagram of the structure of the transmission shaft upper cover;

[0028] Figure 4 It is a schematic diagram of the structure of the transmission shaft upper cover from another angle;

[0029] Figure 5 It is a structural schematic diagram of the transmission shaft upper cover being clamped on the embodiment of the utility model;

[0030] In the figure: 1, bottom plate; 2, second opening groove; 3, spacer block; 4, support column; 5, second lifting piece; 6, third lifting piece; 7, first lifting piece; 8, column; 9, pressure plate; 10, connecting plate; 11, movable plate; 12, protrusion; 13, transmission shaft upper cover; 14, bearing hole. DETAILED DESCRIPTION

[0031] 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.

[0032] Before describing this embodiment, it is necessary to combine Figure 3 and Figure 4 Various parts of the transmission shaft upper cover 13 defined in this embodiment are described. Figure 3 and Figure 4 In the figure, "end A" is the front end of the transmission shaft upper cover 13, and "end B" is the rear end of the transmission shaft upper cover 13. A bearing hole 14 is provided at the front end of the transmission shaft upper cover 13. Figure 4 In the figure, “C surface” is the rear end bottom plane of the transmission shaft upper cover 13. Figure 3 and Figure 4 In the figure, “portion D” is the M8 bolt hole of the transmission shaft upper cover 13 , and “portion E” is the M6 ​​bolt hole of the transmission shaft upper cover 13 .

[0033] This embodiment discloses a positioning tool used when lathe machining the upper cover 13 of the electric tricycle transmission shaft. Figure 1 and Figure 2 As shown, this embodiment includes a base plate 1, a heightening block 3 fixed on the base plate 1 and an automatic clamp, and a first support and a second support fixed on the heightening block 3.

[0034] The bottom plate 1 is a rectangular or square stainless steel plate, with two second opening slots 2 at each end to achieve positioning and assembly on a lathe. Of course, the number of the second opening slots 2 can also be adaptively adjusted according to actual conditions. It should be noted here that after the transmission shaft cover 13 is placed, the front end of the bottom plate 1 corresponds to the front end of the transmission shaft cover 13, and the rear end of the bottom plate 1 corresponds to the rear end of the transmission shaft cover 13.

[0035] The heightening block 3 is a "Π"-shaped structure folded from a stainless steel plate, and its bottom is fixed on the upper surface of the base plate 1, and is used to increase the height of the first support and the second support so as to adapt to the height of the working end of the automatic clamp.

[0036] The first support and the second support cooperate to support the bottom of the transmission shaft cover 13 so that the assembly surface of the transmission shaft cover 13 is parallel to the upper surface of the bottom plate 1. The first support is used to support the outer edge plane of the bolt hole of the transmission shaft cover 13. Figure 1 and Figure 2As shown, the first support includes a plurality of support columns 4 fixedly mounted on the front end of the upper surface of the pad block 3 and a plurality of second lifting members 5. The support column 4 is a steel column with a large bottom diameter, fixedly mounted on the upper surface of the pad block 3; the top diameter is small, and is used to support the outer edge plane of the M8 bolt hole. In this embodiment, there are four support columns 4, and their distribution positions on the pad block 3 correspond to the positions of the M8 bolt holes of the transmission shaft cover 13. When the transmission shaft cover 13 is placed, the top of the support column 4 contacts the outer edge plane of the M8 bolt hole, as shown in FIG. Figure 5 As shown. The second lifting member 5 is an air cylinder or an oil cylinder, the bottom of which is fixed on the upper surface of the raising block 3, and the top is used to support the outer edge plane of the M6 ​​bolt hole. In this embodiment, there are two second lifting members 5, and their distribution positions on the raising block 3 correspond to the positions of the M6 ​​bolt holes of the transmission shaft upper cover 13, and the power output end of the second lifting member 5 is truncated cone-shaped, and the top surface diameter of the truncated cone is smaller than the diameter of the M6 ​​bolt hole. When placed in the transmission shaft upper cover 13, the power output end of the second lifting member 5 is lifted upward, contacts the outer edge plane of the M6 ​​bolt hole and partially extends into the M6 ​​bolt hole, as shown in FIG. Figure 5 shown.

[0037] The second support is used to support the rear end bottom plane of the transmission shaft upper cover 13. Figure 1 and Figure 2 As shown, the second support includes a plurality of third lifting members 6 fixedly mounted on the rear end of the upper surface of the pad block 3. The third lifting member 6 is an air cylinder or an oil cylinder, the bottom of which is fixedly mounted on the upper surface of the pad block 3, and the top is used to support the rear end bottom plane of the transmission shaft upper cover 13. In this embodiment, there are four third lifting members 6, and their distribution positions on the pad block 3 correspond to the rear end bottom plane of the transmission shaft upper cover 13, preferably supporting the edge of the rear end bottom plane. When the transmission shaft upper cover 13 is placed, the power output end of the third lifting member 6 is lifted upward and contacts the rear end bottom plane of the transmission shaft upper cover 13, as shown in the figure. Figure 5 shown.

[0038] The automatic clamp is used to clamp the transmission shaft cover 13 from top to bottom. Figure 1 and Figure 2 As shown, the automatic clamp is located at the front end of the pad block 3, and includes a first lifting member 7, a column 8 and a pressure plate 9. Among them, the first lifting member 7 is an air cylinder or an oil cylinder, the bottom of which is fixed on the base plate 1, and the power output end is vertically upward; the column 8 is a steel column, the bottom of which is provided with threads, and is assembled on the base plate 1 through threads, and is perpendicular to the base plate 1; the pressure plate 9 is the working end of the automatic clamp, or it is called an actuator arm, the rear end of which is hinged to the power output end of the first lifting member 7, the middle part is hinged to the top of the column 8 through a connecting plate 10, and the front end is located above the front end of the pad block 3 as the actuator end. It should be noted that, Figure 1 or Figure 2 As shown, the middle part of the pressing plate 9 is hinged to one end of the connecting plate 10 , and the top end of the column 8 is hinged to the other end of the connecting plate 10 .

[0039] The first lifting member 7, the column 8 and the pressure plate 9 of the automatic clamp form a lever-like structure. When the transmission shaft cover 13 is placed, the power output end of the first lifting member 7 is lifted upward, lifting the rear end of the pressure plate 9, and the front end of the pressure plate 9 is pressed down accordingly to contact the bearing hole 14 of the transmission shaft cover 13. Figure 5 shown.

[0040] In this embodiment, a first opening slot is provided at the front end of the pressing plate 9, and a movable plate 11 is rotatably mounted in the first opening slot. Figure 1 As shown, the thickness of the movable plate 11 is less than that of the pressing plate 9, and both ends of the movable plate 11 have protrusions 12 perpendicular to the surface of the movable plate 11, and the two protrusions 12 are located on the same side. When the transmission shaft upper cover 13 is pressed, the protrusions 12 are located on the side facing the transmission shaft upper cover 13, and are distributed on the front and rear sides of the bearing hole 14 to prevent the transmission shaft upper cover 13 from moving forward and backward.

[0041] It should be noted that, since the bearing hole 14 is semicircular, even if the front end of the pressing plate 9 is set as a plane, only two sides can contact the bearing hole 14. Therefore, in this embodiment, the first opening groove is provided at the front end of the pressing plate 9 and does not affect the pressing of the transmission shaft cover 13.

[0042] In this embodiment, the first lifting member 7, the second lifting member 5 and the third lifting member 6 are all oil cylinders.

[0043] When using this embodiment, first assemble this embodiment on a lathe, and connect the first lifting member 7, the second lifting member 5 and the third lifting member 6 to the oil pipe of the hydraulic station of the lathe; then place the transmission shaft upper cover 13 to be processed on the support column 4 in this embodiment; finally, by controlling the hydraulic station of the lathe, the second lifting member 5 and the third lifting member 6 are actuated to cooperate with the support column 4 to support the bottom of the transmission shaft upper cover 13 so that the assembly surface of the transmission shaft upper cover 13 is parallel to the upper surface of the base plate 1; at the same time, the first lifting member 7 is actuated to lift up the rear end of the pressure plate 9, and the front end of the pressure plate 9 is pressed down accordingly to contact the bearing hole 14 of the transmission shaft upper cover 13 and press it; thus, the clamping of the transmission shaft upper cover 13 is realized.

[0044] After the lathe processing is completed, the transmission shaft upper cover 13 can be removed by controlling the hydraulic station of the lathe to return the first jacking member 7, the second jacking member 5 and the third jacking member 6 to their original positions.

[0045] Repeat the above steps to perform lathe processing on the next transmission shaft upper cover 13 .

[0046] 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 upper cover, characterized in that: It includes a bottom plate, a heightening block fixed on the bottom plate, and an automatic clamp fixed on the bottom plate and located at the front end of the heightening block; The said pad block is fixed with a first support for supporting the outer edge plane of the bolt hole of the transmission shaft upper cover and a second support for supporting the rear end bottom plane of the transmission shaft upper cover; the first support cooperates with the second support to make the assembly surface of the transmission shaft upper cover parallel to the upper surface of the bottom plate; The working end of the automatic clamp faces the padding block so as to press the transmission shaft upper cover above the padding block from top to bottom.

2. The positioning tool for lathe processing of the transmission shaft upper cover according to claim 1 is characterized in that: The automatic clamp comprises a first lifting member fixed on the bottom plate, a column threadedly mounted on the bottom plate and perpendicular to the bottom plate, and a pressing plate mounted on the power output end of the first lifting member; The rear end of the pressure plate is hinged on the power output end of the first lifting member, the middle part is hinged on the top of the column through a connecting plate, and the front end is located above the front end of the pad block; the connecting plate is hinged to the middle part of the pressure plate.

3. The positioning tool for lathe processing of the transmission shaft upper cover according to claim 2 is characterized in that: A first opening slot is formed at the front end of the pressing plate, and a movable plate is rotatably mounted in the first opening slot; The thickness of the movable plate is smaller than that of the pressing plate, and both ends of the movable plate are provided with protrusions perpendicular to the surface of the movable plate; the protrusions face the padding block.

4. The positioning tool for lathe processing of the transmission shaft upper cover according to any one of claims 1 to 3, characterized in that: The first support includes a plurality of support columns for supporting the outer edge plane of the M8 bolt holes of the transmission shaft upper cover and a plurality of second jacking members for supporting the outer edge plane of the M6 ​​bolt holes of the transmission shaft upper cover.

5. The positioning tool for lathe processing of the transmission shaft upper cover according to claim 4 is characterized in that: The power output end of the second lifting member is in a truncated cone shape, and the top surface diameter is smaller than the diameter of the M6 ​​bolt hole.

6. The positioning tool for lathe processing of the transmission shaft upper cover according to any one of claims 1 to 3 and 5, characterized in that: The second support includes a plurality of third lifting members for supporting the edge of the rear end bottom plane of the transmission shaft upper cover.

7. The positioning tool for lathe processing of the transmission shaft upper cover according to claim 6 is characterized in that: Both ends of the bottom plate are provided with second opening grooves to realize positioning and assembly on a lathe.

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