Multi-process combined machining equipment for small engine shell

Abstract

The invention relates to the technical field of machining, and discloses a multi-process combined machining device for a small engine shell, which comprises a positioning tool, a connector and a transmission component, the connector is fixedly mounted on a hydraulic three-jaw chuck, the connector and the hydraulic three-jaw chuck are coaxially arranged, a mounting notch is formed in the end part of the connector, and the transmission component is arranged in the mounting notch. The positioning tool is rotatably mounted in the mounting notch, a turnover oil cylinder and a positioning oil cylinder are arranged on the connector, the turnover oil cylinder drives the positioning tool to turn over according to a fixed angle, and the positioning oil cylinder limits the turnover angle of the positioning tool; according to the multi-procedure combined machining equipment, the clamping function of the hydraulic three-jaw chuck is utilized, power for driving the positioning tool to turn over and limit is provided for the connector, the effect of automatically switching machining faces is achieved, and conditions are provided for machining such as turning, drilling, tapping, chamfering and deburring of the two ends of a workpiece to be machined.

Description

Technical Field

[0001] This invention relates to the field of machining technology, and in particular to a multi-process composite machining equipment for small engine housings. Background Technology

[0002] Small engine housings are characterized by their small size, which makes it easy to switch between the machining surfaces at both ends and meet the conditions for multi-process composite machining. Specifically, for example, motorcycle generator housings require machining of both ends separately, such as turning, drilling, tapping, chamfering, and deburring. Multiple processes can be completed in one clamping, which not only improves machining accuracy but also greatly improves production efficiency.

[0003] In the prior art, patent document CN113732335B discloses an engine end cover machining clamping device, including a base, a support ring, a centering chuck, and two positioning and locking mechanisms. This clamping device avoids the impact of secondary clamping on the machining accuracy and positioning errors of the engine end cover, improving the machining accuracy and consistency of the engine end cover. It not only saves time on secondary clamping but also shortens auxiliary processing time, thereby increasing production efficiency. Furthermore, this clamping device eliminates reliance on the experience and skills of production personnel, facilitating its widespread adoption.

[0004] The aforementioned machining clamping device requires manual switching of the workpiece's machining surface, which is cumbersome, time-consuming, prone to errors, and inconvenient to use. Moreover, this type of machining clamping device needs to rotate during the turning process, making it difficult to automatically complete the back-and-forth switching of the machining surface. Based on this, existing multi-process composite machining equipment has the problem of not being able to automatically switch the machining surface, which urgently needs to be solved. Summary of the Invention

[0005] The purpose of this invention is to solve the problem that existing multi-process composite processing equipment cannot automatically switch processing surfaces, and to propose a multi-process composite processing equipment for small engine housings.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: a multi-process composite processing equipment for a small engine housing, comprising: Positioning fixture, the workpiece to be processed is installed in the positioning fixture; The connector is fixedly mounted on a hydraulic three-jaw chuck, and the connector and the hydraulic three-jaw chuck are arranged coaxially. The end of the connector is provided with a mounting slot. The positioning fixture is rotatably mounted in the mounting slot. The connector is provided with a tilting cylinder and a positioning cylinder. The tilting cylinder drives the positioning fixture to tilt at a fixed angle, and the positioning cylinder limits the tilting angle of the positioning fixture. The transmission assembly includes three transmission arms and three drive cylinders. The three transmission arms are slidably connected to the connector, and the three drive cylinders are fixedly installed inside the connector. The ends of the three transmission arms are respectively fixedly connected to the telescopic ends of the respective drive cylinders. The hydraulic three-jaw chuck is provided with three gripper blocks, and the three transmission arms are respectively fixedly connected to the three gripper blocks. One of the drive cylinders is connected to the tilting cylinder through the first pipeline system, and the other two drive cylinders are connected to the positioning cylinder through the second pipeline system. When the three jaw blocks on the hydraulic three-jaw chuck move back and forth once, the tilting and limiting of the positioning fixture is completed.

[0007] Preferably, a rotating shaft is fixedly installed on both sides of the positioning fixture, and the positioning fixture is rotatably connected to the connector through the rotating shaft. A rack is slidably installed inside the connector, and the telescopic end of the tilting cylinder is fixedly connected to the rack. A gear is fixedly installed on the surface of the rotating shaft of the positioning fixture, and the gear meshes with the rack for transmission.

[0008] Preferably, the positioning fixture has limit holes on both sides, and a conical column is fixedly installed on the telescopic end of the positioning cylinder. When the positioning cylinder telescopically moves, it pushes the conical column into the limit hole, or pulls the conical column out of the limit hole. The connector has an installation cavity at the end away from the positioning fixture, and three drive cylinders are fixedly installed radially in the installation cavity. The outer surface of the connector has a T-shaped groove extending to the installation cavity. The transmission arm is slidably installed in the T-shaped groove, and the end of the transmission arm is fixedly connected to the gripper block by bolts.

[0009] Preferably, the first pipeline system includes a first hydraulic pipe and a second hydraulic pipe. The inner cavities of the drive cylinder and the tilting cylinder are both two hydraulic chambers. The two hydraulic chambers in the drive cylinder and the two hydraulic chambers in the tilting cylinder are connected through the first hydraulic pipe and the second hydraulic pipe. A reversing valve is installed on the first hydraulic pipe and the second hydraulic pipe.

[0010] The connector is equipped with an oil storage chamber. The first hydraulic pipe and the second hydraulic pipe are connected to the oil storage chamber through pipelines equipped with a first check valve and a first pressure relief valve, respectively. The second hydraulic pipe is connected to the oil storage chamber through a pipeline equipped with a second check valve.

[0011] Preferably, the second pipeline system includes a third hydraulic pipe and a fourth hydraulic pipe. The inner cavities of the drive cylinder and the positioning cylinder are both two hydraulic chambers. The two hydraulic chambers in the drive cylinder and the two hydraulic chambers in the positioning cylinder are connected through the third hydraulic pipe and the fourth hydraulic pipe. The third hydraulic pipe and the fourth hydraulic pipe are respectively connected to the oil storage chamber through pipelines with third check valves, and the third hydraulic pipe and the fourth hydraulic pipe are respectively connected to the oil storage chamber through pipelines with second pressure relief valves.

[0012] Preferably, the inner cavity heights of the three drive cylinders are equal, the inner cavity cross-sectional area of ​​the drive cylinder connected to the tilting cylinder is S1, and the inner cavity cross-sectional area of ​​the drive cylinder connected to the positioning cylinder is S2, where S2 < S1.

[0013] The present invention has the following beneficial effects: 1. The multi-process composite machining equipment proposed in this invention assembles a connector with a hydraulic three-jaw chuck. The clamping function of the hydraulic three-jaw chuck provides the connector with the power to drive the positioning fixture to flip and limit its position, achieving the effect of automatically switching the machining surface. This provides the conditions for turning, drilling, tapping, chamfering, deburring, and other machining operations on both ends of the workpiece to be machined. Multiple processes can be completed in one clamping without the need for secondary clamping, reducing the impact on machining accuracy, making clamping operations more convenient, and greatly improving production efficiency.

[0014] 2. The multi-process composite processing equipment proposed in this invention has two hydraulic chambers in the drive cylinder and two hydraulic chambers in the tilting cylinder connected through a first hydraulic pipe and a second hydraulic pipe. A reversing valve is installed on the first hydraulic pipe and the second hydraulic pipe. The reversing valve has the function of switching the flow direction of hydraulic oil in the first hydraulic pipe and the second hydraulic pipe. The reversing valve has two connected states. When the reversing valve is in the first connected state, the jaws of the hydraulic three-jaw chuck change from the clamped state to the released state, thereby driving the positioning fixture to flip. When the jaws of the hydraulic three-jaw chuck change from the released state to the clamped state, the positioning fixture flips in the opposite direction by a certain angle, and at the same time, the conical column is inserted into the limiting hole to complete the limiting of the positioning fixture. When the reversing valve is in the second connected state, the jaws of the hydraulic three-jaw chuck change from the clamped state to the released state, realizing the flipping and reset of the positioning fixture, so as to disassemble and assemble the workpiece to be processed; after the workpiece is installed, the reversing valve is adjusted to the first connected state to realize the cyclical processing function that can automatically switch the processing surface.

[0015] 3. The multi-process composite processing equipment proposed in this invention has an inner cavity cross-sectional area of ​​S1 for the drive cylinder connected to the tilting cylinder and an inner cavity cross-sectional area of ​​S2 for the drive cylinder connected to the positioning cylinder. The design is such that S2 < S1. Although the three drive cylinders move synchronously, the hydraulic oil introduced into the tilting cylinder and the positioning cylinder at different speeds and in different amounts is introduced into each cylinder. The action of the positioning cylinder is delayed compared to the action of the tilting cylinder, providing sufficient time for the positioning fixture to tilt and allowing the conical column to be inserted into the limiting hole, ensuring that the tilting angle of the positioning fixture is determined and repeatable. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of the multi-process composite processing equipment proposed in this invention; Figure 2 Schematic diagram of the connector and hydraulic three-jaw chuck assembly structure Figure 1 ; Figure 3 Schematic diagram of the connector and hydraulic three-jaw chuck assembly structure Figure 2 ; Figure 4 This is a schematic diagram of a partially cut three-dimensional structure of the connector; Figure 5 A schematic diagram of the connector's partial cross-section front view; Figure 6 This is a schematic diagram of a partially cut side view of the connector structure; Figure 7 This is a schematic diagram of the A and B surfaces of the workpiece to be processed; Figure 8 This is a schematic diagram of the first pipeline system proposed in this invention (the reversing valve is in the first connected state). Figure 9 This is a schematic diagram of the first pipeline system proposed in this invention (the reversing valve is in the second connected state). Figure 10 This is a schematic diagram of the second pipeline system proposed in this invention.

[0017] In the diagram: 1. Positioning fixture; 2. Connector; 3. Tilting cylinder; 4. Positioning cylinder; 5. Transmission arm; 6. Drive cylinder; 7. Hydraulic three-jaw chuck; 8. Clamping block; 9. Rack; 10. Gear; 11. Limiting hole; 12. Tapered column; 13. Transition sleeve; 14. First hydraulic pipe; 15. Second hydraulic pipe; 16. Reversing valve; 17. Oil reservoir; 18. First check valve; 19. First pressure relief valve; 20. Third hydraulic pipe; 21. Fourth hydraulic pipe; 22. Second pressure relief valve; 23. Third check valve; 24. Workpiece to be processed; 25. Turning-milling composite machine tool; 26. Second check valve. Detailed Implementation

[0018] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0019] In the description of this invention, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0020] Reference Figures 1-10A multi-process composite processing equipment for a small engine housing includes: a positioning fixture 1, a connector 2, a transmission assembly, a first piping system, and a second piping system; The workpiece 24 to be processed is installed in the positioning fixture 1, as shown in the reference. Figure 7 The workpiece 24 to be processed is divided into surface A and surface B. Processing both ends of the workpiece 24 to be processed means that after surface A is processed facing the tool, it is flipped over so that surface B faces the tool, and then surface B is processed. Connector 2 is fixedly mounted on hydraulic three-jaw chuck 7, and connector 2 is arranged coaxially with hydraulic three-jaw chuck 7. The end of connector 2 is provided with a mounting slot. Positioning fixture 1 is rotatably mounted in the mounting slot. Connector 2 is provided with a tilting cylinder 3 and a positioning cylinder 4. The tilting cylinder 3 drives the positioning fixture 1 to tilt at a fixed angle, and the positioning cylinder 4 limits the tilting angle of the positioning fixture 1. The transmission assembly includes three transmission arms 5 and three drive cylinders 6. The three transmission arms 5 are slidably connected to the connector 2. The three drive cylinders 6 are fixedly installed inside the connector 2, and the ends of the three transmission arms 5 are respectively fixedly connected to the telescopic ends of each drive cylinder 6. The hydraulic three-jaw chuck 7 is provided with three jaw blocks 8, and the three transmission arms 5 are respectively fixedly connected to the three jaw blocks 8. It should be noted that, as Figure 1 As shown, the hydraulic three-jaw chuck 7 refers to the chuck structure on the milling-turning machine tool 25. The milling-turning machine tool 25 has a built-in foot switch. During loading and unloading operations, pressing the foot switch once moves the three jaw blocks 8 towards the center of the hydraulic three-jaw chuck 7, which has the function of clamping the workpiece. Pressing the foot switch again moves the three jaw blocks 8 away from the center of the hydraulic three-jaw chuck 7, which facilitates the removal of the workpiece or fixes the workpiece by internal expansion. In addition, the CNC system of the milling-turning machine tool 25 allows the hydraulic three-jaw chuck 7 to rotate for turning, milling and other machining operations only when the three jaw blocks 8 are in the clamped state or in the internal expansion tension state. The milling-turning machine tool 25 is an existing product and will not be described in detail here.

[0021] The connector 2 is equipped with a first pipeline system and a second pipeline system. One drive cylinder 6 is connected to the tilting cylinder 3 through the first pipeline system, and the two drive cylinders 6 are connected to the positioning cylinder 4 through the second pipeline system. When the three jaw blocks 8 on the hydraulic three-jaw chuck 7 move back and forth once, the tilting and limiting of the positioning fixture 1 is completed.

[0022] Specifically, such as Figure 5As shown, rotating shafts are fixedly installed on both sides of the positioning fixture 1. The positioning fixture 1 is rotatably connected to the connector 2 through the rotating shafts. A rack 9 is slidably installed inside the connector 2. The telescopic end of the tilting cylinder 3 is fixedly connected to the rack 9. A gear 10 is fixedly installed on the surface of the rotating shaft of the positioning fixture 1. The gear 10 meshes with the rack 9 for transmission. When the tilting cylinder 3 telescopically moves, it drives the rack 9 to move up and down, driving the positioning fixture 1 to tilt.

[0023] like Figure 6 As shown, the positioning fixture 1 has limit holes 11 on both sides. A conical column 12 is fixedly installed on the telescopic end of the positioning cylinder 4. When the positioning cylinder 4 telescopically moves, it pushes the conical column 12 into the limit hole 11, or pulls the conical column 12 out of the limit hole 11.

[0024] like Figure 2 , Figure 3 As shown, a transition sleeve 13 is provided between the connector 2 and the hydraulic three-jaw chuck 7, and the connector 2 is fixedly connected to the hydraulic three-jaw chuck 7 by bolts.

[0025] like Figure 4 As shown, the connector 2 has an installation cavity at the end away from the positioning fixture 1. Three drive cylinders 6 are fixedly arranged radially in the installation cavity. The outer circular surface of the connector 2 has a T-shaped groove extending to the installation cavity. The transmission arm 5 is slidably installed in the T-shaped groove. The end of the transmission arm 5 is fixedly connected to the gripper block 8 by bolts. When the gripper block 8 moves back and forth, the transmission arm 5 drives the extension and retraction end of the drive cylinder 6 to reciprocate.

[0026] In this embodiment, reference Figure 8 , Figure 9 The first pipeline system includes a first hydraulic pipe 14 and a second hydraulic pipe 15. The inner cavities of the drive cylinder 6 and the tilting cylinder 3 are both two hydraulic chambers. The two hydraulic chambers in the drive cylinder 6 and the two hydraulic chambers in the tilting cylinder 3 are connected through the first hydraulic pipe 14 and the second hydraulic pipe 15. A reversing valve 16 is installed on the first hydraulic pipe 14 and the second hydraulic pipe 15.

[0027] The connector 2 is provided with an oil storage chamber 17. The first hydraulic pipe 14 and the second hydraulic pipe 15 are connected to the oil storage chamber 17 through pipelines with a first check valve 18 and a first pressure relief valve 19, respectively. The second hydraulic pipe 15 is connected to the oil storage chamber 17 through a pipeline with a second check valve 26.

[0028] It should be noted that, see Figure 8 , Figure 9When the pressure in the first hydraulic pipe 14 and the second hydraulic pipe 15 is greater than the preset pressure of the first pressure relief valve 19, the first pressure relief valve 19 opens, allowing hydraulic oil to be introduced into the oil storage chamber 17. If a negative pressure is formed in the second hydraulic pipe 15, the hydraulic oil in the oil storage chamber 17 is drawn into the second hydraulic pipe 15 by the second check valve 26.

[0029] The directional control valve 16 is a directional control valve with two or more flow modes and two or more ports. It is used to realize the communication, cut-off and reversal of hydraulic oil flow, as well as pressure unloading and sequential action control. The directional control valve 16 can be manually operated to have two connected states: Specifically, such as Figure 8 As shown, when the reversing valve 16 is in the first connected state, the jaw block 8 of the hydraulic three-jaw chuck 7 changes from the clamped state to the released state, that is, the piston in the drive cylinder 6 is pulled upward, and hydraulic oil is injected into the tilting cylinder 3 through the second hydraulic pipe 15. The telescopic end of the tilting cylinder 3 moves upward. (Refer to...) Figure 5 As rack 9 moves upward, it drives positioning fixture 1 to rotate clockwise (180° + ∠X). The jaws 8 of hydraulic three-jaw chuck 7 move from the loosened state to the clamped state, that is, the piston in the driving cylinder 6 is pressed down and moves downward. Hydraulic oil is injected into the tilting cylinder 3 through the first hydraulic pipe 14. The telescopic end of the tilting cylinder 3 extends downward, causing positioning fixture 1 to rotate in the opposite direction by a certain angle (∠X). That is, positioning fixture 1 completes a 180° rotation, so that the A and B surfaces of the workpiece 24 to be processed are interchanged, with the B surface facing the processing tool. At the same time, the tapered column 12 is inserted into the limiting hole 11 to complete the limiting of positioning fixture 1 (see below for details). like Figure 9 As shown, when the reversing valve 16 is in the second connected state, the jaw block 8 of the hydraulic three-jaw chuck 7 changes from the clamped state to the released state, the piston in the drive cylinder 6 is pulled upward, and hydraulic oil is injected into the tilting cylinder 3 through the second hydraulic pipe 15. The telescopic end of the tilting cylinder 3 extends downward, as shown in the reference diagram. Figure 5 The rack 9 moves down, driving the positioning fixture 1 to rotate counterclockwise, thereby resetting the positioning fixture 1 so that the A-side of the workpiece 24 to be processed faces the processing tool, so that the workpiece 24 can be disassembled and assembled. After the workpiece is installed, the reversing valve 16 is adjusted to the first connection state to realize the cyclical processing function that can automatically switch the processing surface.

[0030] In this embodiment, reference Figure 10The second pipeline system includes a third hydraulic pipe 20 and a fourth hydraulic pipe 21. The inner cavities of the drive cylinder 6 and the positioning cylinder 4 are both two hydraulic cavities. The two hydraulic cavities in the drive cylinder 6 and the two hydraulic cavities in the positioning cylinder 4 are connected through the third hydraulic pipe 20 and the fourth hydraulic pipe 21. The third hydraulic pipe 20 and the fourth hydraulic pipe 21 are respectively connected to the oil storage chamber 17 through pipelines with a third check valve 23, and the third hydraulic pipe 20 and the fourth hydraulic pipe 21 are respectively connected to the oil storage chamber 17 through pipelines with a second pressure relief valve 22. It should be noted that when the pressure in the third hydraulic pipe 20 and the fourth hydraulic pipe 21 is greater than the preset pressure of the second pressure relief valve 22, the second pressure relief valve 22 opens, allowing hydraulic oil to be introduced into the oil storage chamber 17. If a negative pressure is formed in the third hydraulic pipe 20 and the fourth hydraulic pipe 21, the hydraulic oil in the oil storage chamber 17 is drawn into the third hydraulic pipe 20 and the fourth hydraulic pipe 21 by the third check valve 23.

[0031] When the piston in the drive cylinder 6 moves upward, hydraulic oil is injected into the positioning cylinder 4 through the third hydraulic pipe 20. (Reference) Figure 6 When the telescopic end of the positioning cylinder 4 extends, the conical column 12 is inserted into the limiting hole 11, thus limiting the positioning fixture 1. Conversely, when the piston in the drive cylinder 6 moves downward, hydraulic oil is injected into the positioning cylinder 4 through the fourth hydraulic pipe 21. (Reference) Figure 6 When the telescopic end of the positioning cylinder 4 retracts, the conical column 12 is pulled out from the limiting hole 11, thus releasing the limiting effect on the positioning fixture 1.

[0032] After the conical column 12 is inserted into the limiting hole 11, the extension and retraction movements of the flipping cylinder 3 and the positioning cylinder 4 are restricted. However, the driving cylinder 6 still needs to extend and retract. Therefore, it is necessary to set the first check valve 18, the first pressure relief valve 19, the second check valve 26, the third check valve 23, and the second pressure relief valve 22 to adjust the positive and negative pressure in the pipeline.

[0033] Among them, the inner cavity heights of the three drive cylinders 6 are equal. The cross-sectional area of ​​the inner cavity of the drive cylinder 6 connected to the tilting cylinder 3 is S1, and the cross-sectional area of ​​the inner cavity of the drive cylinder 6 connected to the positioning cylinder 4 is S2, where S2 < S1. (Reference) Figure 8 , Figure 10 Although the three drive cylinders 6 operate synchronously, the hydraulic oil introduced into the tilting cylinder 3 and the positioning cylinder 4 at different speeds and in different amounts is used. The operation of the positioning cylinder 4 is slower than that of the tilting cylinder 3, providing sufficient time for the positioning fixture 1 to tilt and allowing the conical column 12 to be inserted into the limiting hole 11, ensuring that the tilting angle of the positioning fixture 1 is determined and repeatable.

[0034] The multi-process composite machining equipment proposed in this invention assembles the connector 2 with the hydraulic three-jaw chuck 7. Utilizing the clamping function of the hydraulic three-jaw chuck 7, it provides the power to drive the positioning fixture 1 to rotate and limit the connector 2, achieving the effect of automatically switching the machining surface. This provides conditions for turning, drilling, tapping, chamfering, deburring, and other machining operations on both ends of the workpiece 24 to be machined. Multiple processes can be completed in one clamping without the need for secondary clamping, reducing the impact on machining accuracy, making clamping operations more convenient, and greatly improving production efficiency.

[0035] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A multi-process composite processing equipment for a small engine housing, characterized in that, include: Positioning fixture (1), the workpiece (24) to be processed is installed in positioning fixture (1); Connector (2), connector (2) is fixedly installed on hydraulic three-jaw chuck (7), and connector (2) is arranged coaxially with hydraulic three-jaw chuck (7). The end of connector (2) is provided with a mounting slot. Positioning fixture (1) is rotatably installed in the mounting slot. Connector (2) is provided with a flipping cylinder (3) and a positioning cylinder (4). The flipping cylinder (3) drives the positioning fixture (1) to flip at a fixed angle. The positioning cylinder (4) limits the flipping angle of the positioning fixture (1). The transmission assembly includes three transmission arms (5) and three drive cylinders (6). The three transmission arms (5) are slidably connected to the connector (2). The three drive cylinders (6) are fixedly installed inside the connector (2). The ends of the three transmission arms (5) are fixedly connected to the telescopic ends of each drive cylinder (6). The hydraulic three-jaw chuck (7) is provided with three jaw blocks (8). The three transmission arms (5) are fixedly connected to the three jaw blocks (8) respectively. One of the drive cylinders (6) is connected to the tilting cylinder (3) through the first pipeline system, and the two drive cylinders (6) are connected to the positioning cylinder (4) through the second pipeline system respectively. When the three jaw blocks (8) on the hydraulic three-jaw chuck (7) move back and forth once, the tilting and limiting of the positioning fixture (1) is completed.

2. The multi-process composite processing equipment for a small engine housing according to claim 1, characterized in that: The positioning fixture (1) has rotating shafts fixedly installed on both sides. The positioning fixture (1) is rotatably connected to the connector (2) through the rotating shafts. A rack (9) is slidably installed inside the connector (2). The telescopic end of the tilting cylinder (3) is fixedly connected to the rack (9). A gear (10) is fixedly installed on the surface of the rotating shaft of the positioning fixture (1). The gear (10) meshes with the rack (9) for transmission.

3. The multi-process composite processing equipment for a small engine housing according to claim 1, characterized in that: The positioning fixture (1) has limit holes (11) on both sides. A conical column (12) is fixedly installed on the telescopic end of the positioning cylinder (4). When the positioning cylinder (4) telescopically moves, it pushes the conical column (12) into the limit hole (11) or pulls the conical column (12) out of the limit hole (11).

4. The multi-process composite processing equipment for a small engine housing according to claim 1, characterized in that: A transition sleeve (13) is provided between the connector (2) and the hydraulic three-jaw chuck (7), and the connector (2) is fixedly connected to the hydraulic three-jaw chuck (7) by bolts.

5. The multi-process composite processing equipment for a small engine housing according to claim 1, characterized in that: The connector (2) has an installation cavity at one end away from the positioning fixture (1). Three drive cylinders (6) are fixedly arranged radially in the installation cavity. The outer surface of the connector (2) has a T-shaped groove extending to the installation cavity. The transmission arm (5) is slidably installed in the T-shaped groove. The end of the transmission arm (5) is fixedly connected to the clamp block (8) by bolts.

6. The multi-process composite processing equipment for a small engine housing according to claim 1, characterized in that: The first pipeline system includes a first hydraulic pipe (14) and a second hydraulic pipe (15). The inner cavities of the drive cylinder (6) and the tilting cylinder (3) are both two hydraulic cavities. The two hydraulic cavities in the drive cylinder (6) and the two hydraulic cavities in the tilting cylinder (3) are connected through the first hydraulic pipe (14) and the second hydraulic pipe (15). A reversing valve (16) is installed on the first hydraulic pipe (14) and the second hydraulic pipe (15).

7. The multi-process composite processing equipment for a small engine housing according to claim 6, characterized in that: The connector (2) is provided with an oil storage chamber (17). The first hydraulic pipe (14) and the second hydraulic pipe (15) are connected to the oil storage chamber (17) through pipelines with a first check valve (18) and a first pressure relief valve (19), respectively. The second hydraulic pipe (15) is connected to the oil storage chamber (17) through a pipeline with a second check valve (26).

8. The multi-process composite processing equipment for a small engine housing according to claim 7, characterized in that: The second pipeline system includes a third hydraulic pipe (20) and a fourth hydraulic pipe (21). The inner cavities of the drive cylinder (6) and the positioning cylinder (4) are both two hydraulic chambers. The two hydraulic chambers in the drive cylinder (6) and the two hydraulic chambers in the positioning cylinder (4) are connected through the third hydraulic pipe (20) and the fourth hydraulic pipe (21). The third hydraulic pipe (20) and the fourth hydraulic pipe (21) are respectively connected to the oil storage chamber (17) through pipelines with a third check valve (23). The third hydraulic pipe (20) and the fourth hydraulic pipe (21) are respectively connected to the oil storage chamber (17) through pipelines with a second pressure relief valve (22).

9. The multi-process composite processing equipment for a small engine housing according to claim 8, characterized in that: The three drive cylinders (6) have the same inner cavity height. The cross-sectional area of ​​the inner cavity of the drive cylinder (6) connected to the tilting cylinder (3) is S1, and the cross-sectional area of ​​the inner cavity of the drive cylinder (6) connected to the positioning cylinder (4) is S2, where S2 < S1.

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