A machining tool for the upper housing of a motorcycle engine

Abstract

This utility model relates to a machining fixture for a motorcycle engine upper housing, including a five-axis rotary table and a base plate. The base plate is fixed on the indexing plate of the five-axis rotary table and is provided with positioning pads, positioning pins, a support part, and a clamping device. The positioning pads are used to abut against the end of the upper housing away from the mating surface for positioning. The positioning pins are used to cooperate with the positioning holes on the upper housing for positioning. The support part is used to support the positioned upper housing so that the upper housing is stable in its positioning position. The clamping device is used to press the upper housing onto the positioning pads. Compared with the prior art, this utility model only requires one set of fixtures to complete the machining of seven parts in seven directions on one side of the mating surface of the motorcycle engine upper housing, avoiding multiple assembly and disassembly of the upper housing, making the operation simpler, more time-saving, and with higher production efficiency.

Description

Technical Field

[0001] This utility model relates to the field of machining technology, specifically to a machining fixture for the upper housing of a motorcycle engine. Background Technology

[0002] In the existing technology, after the casting blank of the upper housing of a motorcycle engine is formed, it is necessary to process the oil passage hole, water passage hole, V-groove, threaded hole and other parts on one side of the upper housing mating surface. The processing directions of these parts are different, involving a total of seven different processing directions. Therefore, seven sets of tooling need to be installed on the machining center. The upper housing needs to be assembled and disassembled seven times during processing. The operation is cumbersome, resulting in low production efficiency. The excessive number of fixtures required and the large amount of time spent result in high production costs. Utility Model Content

[0003] The purpose of this utility model is to provide a machining tooling for the upper casing of a motorcycle engine, which addresses the problem that existing technologies require the installation of seven sets of tooling on a machining center to complete the machining of various parts on one side of the upper casing, and that the upper casing needs to be installed and disassembled seven times during machining, which is cumbersome and results in low production efficiency.

[0004] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0005] A machining fixture for a motorcycle engine upper housing includes a five-axis rotary table and a base plate. The base plate is fixed on the indexing plate of the five-axis rotary table. The base plate is provided with a positioning pad, a positioning pin, a support part, and a clamping device. The positioning pad is used to abut against the end of the upper housing away from the mating surface for positioning. The positioning pin is used to cooperate with the positioning hole on the upper housing for positioning. The support part is used to support the positioned upper housing so that the upper housing is stable in its positioning position. The clamping device is used to press the upper housing onto the positioning pad.

[0006] The present invention, employing the aforementioned technical solution, positions the engine upper housing by abutting against the positioning pad and simultaneously by engaging the positioning pin with the pre-set positioning hole on the upper housing. This positions the upper housing on the base plate. A support component provides support to the upper housing, stabilizing it in its position. Finally, a clamping device presses the upper housing firmly onto the positioning pad, ensuring stable clamping of the upper housing. The five-axis rotary table has two mutually perpendicular rotating shafts (one perpendicular to the indexing plate, and the other parallel to it). During machining, the five-axis rotary table can drive... The base plate and the upper housing held on the base plate rotate along these two shafts to adjust to a convenient machining angle. Compared with the existing technology, which requires seven sets of tooling on the machining center to complete the machining of various parts on one side of the upper housing of the engine, and requires seven disassemblies and reassemblies of the upper housing during machining, resulting in cumbersome operation and low production efficiency, this utility model only requires one set of tooling to complete the machining of seven parts on one side of the upper housing of the motorcycle engine, avoiding multiple disassemblies and reassemblies of the upper housing, making the operation simpler, saving time, and increasing production efficiency.

[0007] Furthermore, the base plate is provided with at least three non-collinear positioning pads, with the top surface of any positioning pad abutting against the end of the upper housing away from the closing surface for positioning; with this arrangement, the positioning pads must include three positioning pads distributed in a triangle, and the stability of the upper housing after it abuts against the positioning pads is better.

[0008] Furthermore, the base plate is provided with at least three clamping devices, which are arranged around the upper housing; the upper housing is clamped by the three distributed clamping devices, resulting in better clamping stability.

[0009] Furthermore, the upper housing is provided with two positioning holes, which are located at two opposite ends of the upper housing. The bottom plate is provided with two positioning pins, which cooperate with the two positioning holes respectively. With this arrangement, the two positioning pins limit the upper housing, restricting the upper housing to move only along the axial direction of the positioning pins. Through the positioning pad, the support, and the clamping action of the clamping device, the upper housing is completely clamped.

[0010] Furthermore, the base plate is provided with at least three non-collinear support parts, with the top of any support part abutting and supporting the upper box body; with this arrangement, the support parts must include three support parts distributed in a triangle, which provides better stability for supporting the upper box body.

[0011] Furthermore, the support part is a hydraulic support cylinder; the cylinder barrel of the hydraulic support cylinder is fixed on the base plate, and the piston rod end of the hydraulic support cylinder abuts and supports the upper housing; the hydraulic support cylinder can change the magnitude and stability of the support force by adjusting the internal hydraulic system to adapt to different needs, and has high reliability and high safety.

[0012] Furthermore, the base plate is also provided with several limiting posts, which are arranged around the upper box and are all in contact with the outer edge of the upper box; the limiting posts are used to perform coarse positioning of the upper box during the clamping and fixing process.

[0013] Furthermore, the clamping device is a lever cylinder, which includes a hydraulically driven pressure plate that can press the upper housing onto the top surface of the positioning pad. The lever cylinder is an existing structure, and the pressure of the pressure plate can be accurately controlled, resulting in a good clamping effect.

[0014] Furthermore, a number of shims are fixedly connected to the base plate; any positioning shim, positioning pin, support or clamping device is directly fixedly connected to the base plate or fixedly connected to the shims; by setting shims on the base plate, any positioning shim, positioning pin, support or clamping device can be selected to be raised to a suitable position as needed, to match the shape and structure of the upper box, so as to realize the positioning, support or clamping function.

[0015] Compared with the existing technology, the advantages of this utility model are: only one set of tooling is needed to complete the processing of seven parts on one side of the upper housing of the motorcycle engine, avoiding multiple assembly and disassembly of the upper housing, making the operation simpler, saving time, and increasing production efficiency. Attached image description:

[0016] Figure 1 This is a schematic diagram of the structure of this utility model;

[0017] Figure 2 This is a partial structural diagram of the present invention;

[0018] Figure 3 This is a front view of the present invention;

[0019] Figure 4 This is a schematic diagram of the machining state of the present invention after the engine upper housing is clamped.

[0020] Figure 5 This is a structural diagram of the engine's upper housing;

[0021] Figure 6 This is a structural schematic diagram of the engine's upper housing from another perspective.

[0022] The markings in the diagram are: 1-Five-axis rotary table, 2-Base plate, 3-Indexing plate, 4-Positioning pad, 5-Positioning pin, 6-Support part, 7-Pressure device, 8-Upper box, 9-Matching surface, 10-Positioning hole, 11-Limiting post, 12-Elevating block, 13-Worktable. Detailed Implementation

[0023] The present invention will now be described in detail with reference to the accompanying drawings.

[0024] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain this utility model and are not intended to limit this utility model.

[0025] A machining fixture for a motorcycle engine upper housing includes a five-axis rotary table 1 and a base plate 2. The base plate 2 is fixed on the indexing plate 3 of the five-axis rotary table 1. The base plate 2 is provided with positioning pads 4, positioning pins 5, support parts 6, and clamping devices 7. The positioning pads 4 are used to abut and position the end of the upper housing 8 away from the housing surface 9. The positioning pins 5 are used to cooperate with the positioning holes 10 on the upper housing 8 for positioning. The support parts 6 are used to support the positioned upper housing 8 so that the upper housing 8 is stable in its positioning position. The clamping device 7 is used to press the upper housing 8 onto the positioning pads 4. The structure of the five-axis rotary table 1 is prior art.

[0026] The base plate 2 is provided with at least three non-collinear positioning pads 4. The top surface of any positioning pad 4 abuts against the end of the upper box 8 away from the closing surface 9 for positioning. The top surface of any positioning pad 4 is parallel to the base plate 2. In this embodiment, three positioning pads 3 are provided, and the three are distributed in a triangle.

[0027] At least three clamping devices 7 are provided on the base plate 2, and the clamping devices 7 are arranged around the upper housing 8; in this embodiment, four clamping devices 7 are provided; in this embodiment, the clamping device 7 is a lever cylinder, which includes a hydraulically driven pressure plate that can press the upper housing 8 against the top surface of the positioning pad 4; the lever cylinder is existing technology, for example, a lever cylinder of the CLKA-P series can be used, and its structure will not be described in detail here; in addition, the clamping device 7 can also be a lever cylinder, which is also existing technology;

[0028] The upper housing 8 is provided with two positioning holes 10, which are located at two opposite ends of the upper housing 8. The bottom plate 2 is provided with two positioning pins 5, which are respectively engaged with the two positioning holes 10. The central axis of the two positioning pins 5 is perpendicular to the bottom plate 2.

[0029] The base plate 2 is provided with at least three non-collinear support parts 6, and the top of any support part 6 abuts and supports the upper box body 8; in this embodiment, a total of five support parts 6 are provided; the support part 6 is a hydraulic support cylinder; the cylinder barrel of the hydraulic support cylinder is fixed on the base plate 2, and the piston rod end of the hydraulic support cylinder abuts and supports the upper box body 8.

[0030] The base plate 2 is also provided with a number of limiting posts 11, which are arranged around the upper box 8 and are all in contact with the outer edge of the upper box 8; in this embodiment, a total of three limiting posts 11 are provided.

[0031] Several shims 12 are fixedly connected to the base plate 2; any positioning pad 4, positioning pin 5, support part 6 or pressing device 7 is directly fixedly connected to the base plate 2, or fixedly connected to the shim 12.

[0032] After clamping and fixing the engine upper housing 8 with this tooling, the bottom of the five-axis rotary table 1 is fixed on the worktable 13 of the machining center, and machining can then be performed.

[0033] The present invention, employing the aforementioned technical solution, positions the engine upper housing 8 by abutting against the positioning pad 4 and engaging with the positioning pin 5 in the pre-set positioning hole 10 on the upper housing 8. This positions the upper housing 8 on the base plate 2. The support part 6 provides support for the upper housing 8, stabilizing it in the positioning position. Finally, the clamping device 7 presses the upper housing 8 firmly onto the positioning pad 4, ensuring a stable clamping of the upper housing 8. The five-axis rotary table 1 has two mutually perpendicular rotating shafts (one perpendicular to the indexing plate 3, and the other parallel to the indexing plate 3). During processing, the five... The rotary table 1 can drive the base plate 2 and the upper housing 8 clamped on the base plate 2 to rotate along the two rotating shafts and adjust to a convenient machining angle. Compared with the existing technology, which requires the installation of seven sets of tooling on the machining center to complete the machining of each part on the mating surface of the engine upper housing, and requires the upper housing to be installed and disassembled seven times during machining, which is cumbersome and results in low production efficiency, this utility model only requires one set of tooling to complete the machining of the seven parts on the mating surface of the motorcycle engine upper housing, avoiding multiple installation and disassembly of the upper housing, making the operation simpler, saving time, and increasing production efficiency.

[0034] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A machining fixture for a motorcycle engine upper housing, characterized in that: The system includes a five-axis rotary table (1) and a base plate (2). The base plate (2) is fixed on the indexing plate (3) of the five-axis rotary table (1). The base plate (2) is provided with a positioning pad (4), a positioning pin (5), a support part (6), and a pressing device (7). The positioning pad (4) is used to abut against the end of the upper box (8) away from the box-joining surface (9) for positioning. The positioning pin (5) is used to cooperate with the positioning hole (10) on the upper box (8) for positioning. The support part (6) is used to support the upper box (8) after positioning so that the upper box (8) is stable in its positioning position. The pressing device (7) is used to press the upper box (8) onto the positioning pad (4).

2. The machining fixture for the upper casing of a motorcycle engine according to claim 1, characterized in that: The base plate (2) is provided with at least three non-collinear positioning pads (4), and the top surface of any positioning pad (4) abuts against the end of the upper box (8) away from the box-closing surface (9) for positioning.

3. The machining fixture for the upper casing of a motorcycle engine according to claim 1, characterized in that: At least three clamping devices (7) are provided on the base plate (2), and the clamping devices (7) are arranged around the upper box (8).

4. The machining fixture for the upper casing of a motorcycle engine according to claim 1, characterized in that: The upper housing (8) is provided with two positioning holes (10), which are located at two opposite ends of the upper housing (8). The bottom plate (2) is provided with two positioning pins (5), which cooperate with the two positioning holes (10) respectively.

5. The machining fixture for the upper casing of a motorcycle engine according to claim 1, characterized in that: The base plate (2) is provided with at least three non-collinear support parts (6), and the top of any support part (6) abuts against the upper box (8).

6. The machining fixture for the upper casing of a motorcycle engine according to claim 5, characterized in that: The support part (6) is a hydraulic support cylinder; the cylinder barrel of the hydraulic support cylinder is fixed on the base plate (2), and the piston rod end of the hydraulic support cylinder abuts and supports on the upper box (8).

7. The machining fixture for the upper casing of a motorcycle engine according to claim 1, characterized in that: The base plate (2) is also provided with several limiting posts (11), which are arranged around the upper box (8) and are all in contact with the outer edge of the upper box (8).

8. The machining fixture for the upper casing of a motorcycle engine according to claim 1, characterized in that: The clamping device (7) is a lever cylinder, which includes a hydraulically driven pressure plate that can press the upper housing (8) onto the top surface of the positioning pad (4).

9. The machining fixture for the upper casing of a motorcycle engine according to claim 1, characterized in that: A number of shims (12) are fixedly connected to the base plate (2); any positioning pad (4), positioning pin (5), support part (6) or pressing device (7) is directly fixedly connected to the base plate (2) or fixedly connected to the shims (12).

Images