A camshaft signal wheel press-fitting device and press-fitting method

Abstract

This invention discloses a camshaft signal wheel press-fitting device and method, belonging to the field of positioning press-fitting technology. The camshaft signal wheel press-fitting device includes a worktable, a slide block above the worktable, a fixing structure on the slide block for fixing the front end of the camshaft, a sliding structure on the worktable for driving the slide block to slide on the worktable, a press-fitting force detector between the sliding structure and the slide block, and a displacement sensor on the worktable for controlling the sliding position of the slide block. A connecting seat is also provided on the worktable, and a positioning mechanism for positioning the tail end of the camshaft and the signal wheel is provided on the connecting seat. The positioning mechanism is at the same height as the fixing structure, and a support block for supporting the camshaft is provided between the positioning mechanism and the fixing structure. This invention, using the above-mentioned camshaft signal wheel press-fitting device and method, achieves direct cold press-fitting between the camshaft and the signal wheel. It has a simple structure, is easy to use, and provides high assembly quality between the camshaft and the signal wheel.

Description

Technical Field

[0001] This invention relates to the field of positioning and pressing technology, and in particular to a camshaft signal wheel pressing device and pressing method. Background Technology

[0002] The camshaft is part of the engine's valve train, specifically responsible for driving the valves to open and close on time. Its function is to ensure that the engine draws in fresh combustible mixture into the cylinders at regular intervals and promptly expels exhaust gases after combustion. The main body of the camshaft is a cylindrical rod approximately the same length as the cylinder bank, with several cams fitted on it to drive the valves. A signal wheel is interference-fitted to the end of the camshaft. The signal wheel provides a signal to a speed sensor, which transmits the signal to the electronic control unit (ECU). Upon receiving the signal, the ECU controls the engine's fuel injection and ignition. Because the camshaft and signal wheel are interference-fitted, a press-fit device is used to assemble the signal wheel and camshaft.

[0003] Existing patent CN202222586968.X discloses a camshaft heat-fitting signal wheel fixture, which includes a mounting plate. A first limiting mechanism and a driving mechanism are respectively connected to the two ends of the upper surface of the mounting plate. A second limiting mechanism is slidably connected to the mounting plate between the first limiting mechanism and the driving mechanism, and the driving mechanism is connected to one end of the second limiting mechanism. When a heated signal wheel and a camshaft are respectively positioned on the first and second limiting mechanisms, the driving mechanism drives the second limiting mechanism to move towards the first limiting mechanism, so that the signal wheel is heat-fitted onto the outside of one end of the camshaft. At room temperature, it cools for a set time until the signal wheel is fixed to the outside of the camshaft. The first limiting mechanism includes a detachable positioning ring and a first clamping component. When the signal wheel is placed inside the positioning ring, the first clamping component clamps and limits the signal wheel. This utility model provides a camshaft heat-fitting signal wheel fixture with a simple structure, convenient operation, and the ability to press-fit signal wheels onto different types of camshafts. It has strong versatility and saves costs. The aforementioned patent requires heating the signal wheel and camshaft for installation, which is inconvenient to use; and the structure is relatively complex. Summary of the Invention

[0004] The purpose of this invention is to provide a camshaft signal wheel press-fitting device and press-fitting method, which realizes direct cold press-fitting between the camshaft and the signal wheel. It has a simple structure, is easy to use, and has high assembly quality between the camshaft and the signal wheel.

[0005] To achieve the above objectives, the present invention provides a camshaft signal wheel press-fitting device, including a worktable, a slide seat above the worktable, a fixing structure for fixing the front end of the camshaft on the slide seat, a sliding structure for driving the slide seat to slide on the worktable, a press-fitting force detector between the sliding structure and the slide seat, a displacement sensor for controlling the sliding position of the slide seat on the worktable, and the displacement sensor being electrically connected to a controller; a connecting seat on the worktable, a positioning mechanism for positioning the tail end of the camshaft and the signal wheel on the connecting seat, the positioning mechanism being at the same height as the fixing structure, and a support block for supporting the camshaft being provided between the positioning mechanism and the fixing structure.

[0006] Preferably, the fixing structure includes a front ejector pin inserted into the center hole of the front end of the camshaft. The front ejector pin is slidably disposed in the fixing sleeve. The front end of the camshaft abuts against the end face of the fixing sleeve. The fixing sleeve is horizontally fixed on the slide block. The slide block is provided with a second electric cylinder that drives the ejector pin to slide in the fixing sleeve. The second electric cylinder is electrically connected to the controller.

[0007] Preferably, the sliding structure includes a first electric cylinder, which is mounted on the worktable. The piston rod of the first electric cylinder is fixedly connected to the slide block, and the first electric cylinder is electrically connected to the controller. A guide rail is provided on the worktable to guide the sliding of the slide block.

[0008] Preferably, the pressing force detector is a pressure sensor, which is electrically connected to the controller and is located between the first electric cylinder and the slide.

[0009] Preferably, the workbench is equipped with an angle detector for detecting the angle of the signal wheel. The light from the angle detector is flush with the surface of the signal wheel after positioning, and the angle detector is electrically connected to the controller.

[0010] Preferably, a barcode scanner is provided on the workbench, and the barcode scanner is electrically connected to the controller.

[0011] Preferably, the positioning mechanism includes a mounting base, one end of which is provided with a positioning block for a positioning signal wheel, and the positioning block is provided with a clamping structure for clamping the signal wheel. The other end of the mounting base is fixedly connected to a connecting sleeve provided at the end of a fixed base. The fixed base is fixedly mounted on the connecting base, and the connecting sleeve is provided with a positioning structure for the tail end of a positioning camshaft.

[0012] Preferably, the clamping structure includes a sleeve, one end of which is provided with an opening for mounting a top ball, the top ball being rotatably connected to the sleeve, and a spring for clamping the top ball being provided inside the sleeve; a slot is provided on the side wall of the positioning block, and a mounting hole for mounting the sleeve is provided on the slot, the mounting hole being located on a protrusion on the inner side of the positioning block for positioning the signal wheel.

[0013] Preferably, the positioning structure includes a positioning sleeve, which is slidably disposed in the inner cavity of the connecting sleeve. The inner wall of the connecting sleeve is provided with a fixing hole for installing a guide key. The side wall of the positioning sleeve is provided with a guide groove for inserting the guide key. The guide key is slidably connected to the guide groove. The tail end of the connecting sleeve is provided with a second sealing plate. A second spring is provided between the second sealing plate and the positioning sleeve. One end of the positioning sleeve is provided with a positioning platform for positioning the tail end of the camshaft. A positioning pin is slidably disposed in a stepped sliding hole inside the positioning sleeve. A first spring is provided between a fixing plate at one end of the positioning pin and a first sealing plate at the tail end of the positioning sleeve. The positioning pin is inserted into the center hole at the tail end of the camshaft under the action of the first spring.

[0014] The pressing method of the above-mentioned camshaft signal wheel pressing device includes the following steps:

[0015] S1. Place the signal wheel inside the positioning block, and the top ball on the positioning block presses against the signal wheel under the action of the spring.

[0016] S2. Place the camshaft on the support block, insert the positioning pin into the center hole at the tail end of the camshaft, and insert the positioning table into the groove at the tail end of the camshaft.

[0017] S3. Start the second electric cylinder. The second electric cylinder drives the front pin to insert into the center hole at the front end of the camshaft to pre-position the camshaft.

[0018] S4. Start the first electric cylinder. The first electric cylinder drives the slide block to slide towards the support block. The slide block applies a pushing force to the camshaft through the fixed sleeve. The tail end of the camshaft pushes the positioning pin and the positioning sleeve to slide backward. The first spring and the second spring are compressed. The camshaft is assembled with the signal wheel. The displacement sensor detects the sliding position of the slide block, and the pressure sensor detects the pressure applied by the first electric cylinder.

[0019] S5. The first electric cylinder retracts, and the installation angle of the signal wheel is detected by an angle detector. When the installation angle of the signal wheel meets the requirements, the second electric cylinder retracts, and the front ejector pin exits from the camshaft, completing the press-fit. When the installation angle of the signal wheel does not meet the requirements, the operator reworks the press-fit of the signal wheel and the camshaft.

[0020] The advantages and positive effects of the camshaft signal wheel pressing device and pressing method described in this invention are as follows:

[0021] 1. The present invention ensures the assembly effect between the camshaft and the signal wheel by setting up a pressure sensor, a displacement sensor and an angle detector.

[0022] 2. In this invention, the front ejector pin and the positioning ejector pin are on the same horizontal line. The horizontal sliding of the front ejector pin is limited by the fixing sleeve, and the horizontal sliding of the positioning ejector pin is limited by the positioning sleeve and the connecting sleeve, which ensures the levelness of the camshaft during assembly and helps to improve the assembly quality.

[0023] 3. The tail end of the camshaft and the signal wheel are concentrically fixed on the same positioning mechanism, which helps to improve the coaxiality of the camshaft and signal wheel assembly.

[0024] 4. The clamping structure on the positioning block improves the stability of the signal wheel when it is installed on the positioning block.

[0025] 5. The camshaft signal wheel pressing device of the present invention has a simple structure and is easy to use, which is conducive to improving the pressing efficiency of camshaft and signal wheel.

[0026] The technical solution of the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of an embodiment of the camshaft signal wheel pressing device and pressing method of the present invention;

[0028] Figure 2 This is a schematic diagram of the positioning mechanism structure of an embodiment of the camshaft signal wheel pressing device and pressing method of the present invention;

[0029] Figure 3 This is an exploded view of the positioning mechanism in an embodiment of the camshaft signal wheel press-fitting device and press-fitting method of the present invention;

[0030] Figure 4 This is a schematic cross-sectional view of the positioning mechanism in an embodiment of the camshaft signal wheel pressing device and pressing method of the present invention;

[0031] Figure 5 This is a schematic diagram of the positioning block structure in an embodiment of the camshaft signal wheel pressing device and pressing method of the present invention;

[0032] Figure 6 This is a schematic diagram of the mounting base structure of an embodiment of the camshaft signal wheel press-fitting device and press-fitting method of the present invention;

[0033] Figure 7 This is a schematic diagram of the fixed base structure of an embodiment of the camshaft signal wheel pressing device and pressing method of the present invention;

[0034] Figure 8 This is a schematic diagram of the positioning sleeve structure in an embodiment of the camshaft signal wheel press-fitting device and press-fitting method of the present invention;

[0035] Figure 9 This is a schematic diagram of the positioning pin structure in an embodiment of the camshaft signal wheel pressing device and pressing method of the present invention;

[0036] Figure 10This is a schematic diagram of the clamping structure of an embodiment of the camshaft signal wheel pressing device and pressing method of the present invention.

[0037] Figure Labels

[0038] 1. Worktable; 2. Slide; 3. Guide rail; 4. First electric cylinder; 5. Fixing sleeve; 6. Front ejector pin; 7. Second electric cylinder; 8. Support block; 9. Barcode scanner; 10. Angle detector; 11. Controller; 12. Connecting seat; 13. Positioning mechanism; 14. Mounting seat; 15. Positioning block; 16. Positioning sleeve; 17. Positioning ejector pin; 18. Fixing seat; 19. Connecting sleeve; 20. Tightening structure; 21. Slot; 22. First bolt; 23. 24. First adjusting hole; 25. Second bolt; 26. Positioning platform; 27. Second adjusting hole; 28. Guide groove; 29. ​​Guide key; 30. Fixing hole; 31. First sealing plate; 32. Second spring; 33. Second sealing plate; 34. Mounting hole; 35. First connecting hole; 36. Second connecting hole; 37. Mounting groove; 38. Inner cavity; 39. Third connecting hole; 40. Sliding hole; 41. Fixing plate; 42. Sleeve; 43. Top ball. Detailed Implementation

[0039] The technical solution of the present invention will be further described below with reference to the accompanying drawings and embodiments.

[0040] Unless otherwise defined, the technical or scientific terms used in this invention shall have the ordinary meaning understood by one of ordinary skill in the art to which this invention pertains. The terms "first," "second," and similar terms used in this invention do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Terms such as "comprising" or "including" mean that the element or object preceding the word encompasses the elements or objects listed following the word and their equivalents, without excluding other elements or objects. Terms such as "connected" or "linked" are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. Terms such as "upper," "lower," "left," and "right" are used only to indicate relative positional relationships; when the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0041] Example

[0042] like Figure 1-10As shown, a camshaft signal wheel pressing device includes a worktable 1, which is fixed to the ground by support legs. A slide 2 is mounted above the worktable 1, and a fixing structure for fixing the front end of the camshaft is mounted on the slide 2. The fixing structure includes a front ejector pin 6 inserted into the center hole of the front end of the camshaft, and the front ejector pin 6 is slidably disposed within a fixing sleeve 5. The front end of the camshaft abuts against the end face of the fixing sleeve 5, which is horizontally fixed to the slide 2. The fixing sleeve 5 guides the sliding of the front ejector pin 6, ensuring that the front ejector pin 6 slides horizontally. A second electric cylinder 7 is mounted on the slide 2 to drive the ejector pin to slide within the fixing sleeve 5, and the second electric cylinder 7 is electrically connected to a controller 11.

[0043] The worktable 1 is equipped with a sliding structure that drives the slide block 2 to slide on the worktable 1. The sliding structure includes a first electric cylinder 4, which is mounted on the worktable 1. The piston rod of the first electric cylinder 4 is fixedly connected to the slide block 2. The worktable 1 is equipped with a guide rail 3 that guides the sliding of the slide block 2. Under the action of the guide rail 3, the slide block 2 slides along the axis of the camshaft. The first electric cylinder 4 is electrically connected to the controller 11.

[0044] A pressure sensor, which is electrically connected to the controller 11, is installed between the sliding structure and the slide block 2. The pressure sensor is positioned between the first electric cylinder 4 and the slide block 2. The pressure sensor detects the pressure applied by the first electric cylinder 4, thereby reflecting the interference fit between the signal wheel and the camshaft, and also the assembly quality between the camshaft and the signal wheel.

[0045] A displacement sensor is installed on the worktable 1 to control the sliding position of the slide block 2. The displacement sensor is electrically connected to the controller 11. The displacement sensor controls the sliding position of the slide block 2, thereby controlling the sliding position of the camshaft and ensuring the assembly effect between the signal wheel and the camshaft.

[0046] A connecting seat 12 is provided on the worktable 1, and a positioning mechanism 13 for positioning the tail end of the camshaft and the signal wheel is fixedly mounted on the connecting seat 12. The positioning mechanism 13 is at the same height as the fixed structure, thereby ensuring the horizontal state of the camshaft. A support block 8 for supporting the camshaft is provided between the positioning mechanism 13 and the fixed structure, and the support block 8 is fixed on the worktable 1. A V-shaped groove is opened at the top of the support block 8.

[0047] The positioning mechanism 13 includes a mounting base 14, one end of which has a mounting groove 37, and a positioning block 15 is disposed within the mounting groove 37. The positioning block 15 has an arc-shaped first adjustment hole 23, and the mounting groove 37 has a first connecting hole 35. A first bolt 22 passes through the first adjustment hole 23 and the first connecting hole 35 to lock the positioning block 15 within the mounting groove 37. The first connecting hole 35 is a threaded hole, and the first adjustment hole 23 can be used to adjust the installation angle of the positioning block 15 within the mounting groove 37 as needed. The inner surface of the positioning block 15 is a contoured design, meaning that the inner surface of the positioning block 15 matches the shape of the outer surface of the signal wheel, allowing the signal wheel to be positioned precisely within the inner surface of the positioning block 15.

[0048] The positioning block 15 is equipped with a clamping structure 20 for clamping the signal wheel. The clamping structure 20 includes a sleeve 42, one end of which has an opening for mounting a top ball 43. The diameter of the opening is smaller than the diameter of the top ball 43, allowing one end of the top ball 43 to protrude from the opening. The top ball 43 is rotatably connected to the sleeve 42, and a spring is installed inside the sleeve 42 to clamp the top ball 43. A slot 21 is provided on the side wall of the positioning block 15, and a mounting hole 34 for fixing the sleeve 42 is provided on the slot 21. The mounting hole 34 is located on a protrusion on the inner side of the positioning block 15 used for positioning the signal wheel. Under the action of the spring, the top ball 43 is clamped against the side of the signal wheel, making the signal wheel fit tightly against the positioning block 15 and improving the stability of the signal wheel positioning.

[0049] The other end of the mounting base 14 is fixedly connected to the connecting sleeve 19 at the end of the fixed base 18. The mounting base 14 has a second connecting hole 36, and the connecting sleeve 19 has a third connecting hole 39. A second bolt 24 passes through the second connecting hole 36 and the third connecting hole 39 to fix the mounting base 14 and the connecting sleeve 19 together. Both the second connecting hole 36 and the third connecting hole 39 are threaded holes. The end of the mounting base 14 near the connecting sleeve 19 has a groove for inserting the connecting sleeve 19, facilitating the assembly of the connecting sleeve 19 and the mounting base 14 and improving the stability of the connection between the mounting base 14 and the connecting sleeve 19.

[0050] The fixed base 18 is provided with a second adjustment hole 26. Bolts pass through the second adjustment hole 26 and the hole on the connecting base 12 to fix the fixed base 18 and the connecting base 12 in place. The arc-shaped second adjustment hole 26 can adjust the installation angle of the fixed base 18 as needed.

[0051] The connecting sleeve 19 has a positioning structure inside for positioning the tail end of the camshaft. The positioning structure includes a positioning sleeve 16, which is slidably disposed within the inner cavity 38 of the connecting sleeve 19. A hole is provided at the center of the mounting base 14 for the positioning sleeve 16 to pass through, and the positioning sleeve 16 is slidably connected to the mounting base 14. A fixing hole 29 for mounting a guide key 28 is provided on the inner wall of the connecting sleeve 19, and a guide groove 27 for inserting the guide key 28 is provided on the side wall of the positioning sleeve 16, with the guide key 28 slidably connected to the guide groove 27. The guide key 28 and the guide groove 27 guide and limit the sliding of the positioning sleeve 16, preventing rotation during sliding. A second sealing plate 33 is provided at the tail end of the connecting sleeve 19, and the second sealing plate 33 is threadedly connected to the connecting sleeve 19. A second spring 32 is provided between the second sealing plate 33 and the positioning sleeve 16, and the second spring 32 applies an outward pushing force to the positioning sleeve 16. One end of the positioning sleeve 16 is provided with a positioning table 25 for positioning the tail end of the camshaft. The slot at the tail end of the camshaft is inserted into the positioning table 25 to prevent the camshaft and the signal wheel from rotating during the pressing process.

[0052] A positioning pin 17 is slidably disposed within a stepped sliding hole 40 inside the positioning sleeve 16, and a fixing plate 41 is fixedly disposed at one end of the positioning pin 17. A first sealing plate 31 is threadedly connected to the tail end of the positioning sleeve 16, and a first spring 30 is disposed between the first sealing plate 31 and the fixing plate 41. The first spring 30 applies a pushing force to the positioning pin 17. Under the action of the first spring 30, the positioning pin 17 is inserted into the center hole at the tail end of the camshaft.

[0053] An angle detector 10 for detecting the angle of the signal wheel is installed on the workbench 1. The angle detector 10 is electrically connected to the controller 11. The angle detector 10 is an existing structure that receives the intensity of light emitted by the transmitter through a receiver, and then determines the tilt angle based on the refraction of the light. By detecting the tilt of the assembled signal wheel through the angle detector 10, the assembly effect of the signal wheel and camshaft is ensured.

[0054] A barcode scanner 9 is installed on the workbench 1, and the barcode scanner 9 is electrically connected to the controller 11. By scanning the process codes on the camshaft and signal wheel with the barcode scanner 9, the machining process of the camshaft and signal wheel can be viewed, and the operator, operating equipment and specific parameters can be recorded to avoid missing any machining steps.

[0055] The first electric cylinder 4, the second electric cylinder 7, the pressure sensor, the displacement sensor, the angle detector 10, and the barcode scanner 9 are all electrically connected to the controller 11 using existing technologies as needed.

[0056] The pressing method of the above-mentioned camshaft signal wheel pressing device includes the following steps:

[0057] S1. Place the signal wheel inside the positioning block 15. The top ball 43 on the positioning block 15 presses against the signal wheel under the action of the spring, eliminating the gap between the signal wheel and the positioning block.

[0058] S2. Place the camshaft on the support block 8, insert the positioning pin 17 into the center hole at the tail end of the camshaft, and insert the positioning table 25 into the groove at the tail end of the camshaft.

[0059] S3. Start the second electric cylinder 7. The second electric cylinder 7 drives the front ejector pin 6 to insert into the center hole at the front end of the camshaft to pre-position the camshaft.

[0060] S4. Start the first electric cylinder 4. The first electric cylinder 4 drives the slide 2 to slide towards the support block 8. The slide 2 applies a pushing force to the camshaft through the fixing sleeve 5. The tail end of the camshaft pushes the positioning pin 17 and the positioning sleeve 16 to slide backward. The first spring 30 and the second spring 32 are both compressed, and the camshaft is assembled with the signal wheel. The displacement sensor detects the sliding position of the slide 2, and the pressure sensor detects the pressure applied by the first electric cylinder 4.

[0061] After the sliding position of slide 2 reaches the required position, the first electric cylinder 4 retracts, and the angle detector 10 checks whether the installation angle of the signal wheel meets the requirements. When the installation angle of the signal wheel meets the requirements, the second electric cylinder 7 retracts, and the front ejector pin 6 exits from the camshaft, completing the press-fit. When the installation angle of the signal wheel does not meet the requirements, the operator reworks the press-fit of the signal wheel and camshaft.

[0062] All pressing process parameters are uploaded to controller 11 so that the pressing status of the camshaft and signal wheel can be viewed via QR code. Therefore, the present invention uses the above-mentioned camshaft and signal wheel pressing device and pressing method to achieve direct cold pressing between the camshaft and signal wheel. It has a simple structure, is easy to use, and produces high assembly quality between the camshaft and signal wheel.

[0063] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit them. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can still be made to the technical solutions of the present invention, and these modifications or equivalent substitutions cannot cause the modified technical solutions to deviate from the spirit and scope of the technical solutions of the present invention.

Claims

1. A camshaft signal wheel press fitting device characterized by: The utility model provides a camshaft pressure mounting device, including workbench, the upper portion of workbench is provided with slide, is provided with fixed structure of fixed camshaft front end on the slide, is provided with the sliding structure of drive slide on workbench, is provided with the pressure mounting force detector between sliding structure and slide, is provided with the displacement sensor of control slide sliding position on workbench, displacement sensor and controller electricity are connected;Workbench is provided with connecting seat, is provided with the positioning mechanism of positioning camshaft tail end and signal wheel on connecting seat, positioning mechanism and fixed structure are on the same height, positioning mechanism and fixed structure between are provided with the support block of supporting camshaft; The positioning mechanism includes a mounting seat, one end of the mounting seat is provided with a positioning block for positioning the signal wheel, the positioning block is provided with a clamping structure for clamping the signal wheel, the other end of the mounting seat is fixedly connected with a connecting sleeve provided at the end of the fixed seat, the fixed seat is fixedly installed on the connecting seat, the inside of the connecting sleeve is provided with a positioning structure for positioning the tail end of the camshaft; The positioning structure includes a positioning sleeve, the positioning sleeve is slidably arranged in the inner cavity of the connecting sleeve, the inner wall of the connecting sleeve is provided with a fixing hole for installing a guide key, the side wall of the positioning sleeve is provided with a guide groove for inserting the guide key, the guide key is slidably connected with the guide groove, the tail end of the connecting sleeve is provided with a second sealing plate, a second spring is arranged between the second sealing plate and the positioning sleeve, one end of the positioning sleeve is provided with a positioning platform for positioning the tail end of the camshaft; A positioning thimble is slidably arranged in the stepped sliding hole of the positioning sleeve, a fixed plate provided at one end of the positioning thimble is arranged between the first sealing plate provided at the tail end of the positioning sleeve and a first spring, the positioning thimble is inserted into the center hole of the tail end of the camshaft under the action of the first spring.

2. A camshaft signal wheel press fitting device according to claim 1, characterized in that: The fixing structure includes a front thimble inserted into the center hole of the front end of the camshaft, the front thimble is slidably arranged in a fixing sleeve, the front end of the camshaft abuts against the end face of the fixing sleeve, the fixing sleeve is horizontally fixed on the slide, the slide is provided with a second electric cylinder for driving the thimble to slide in the fixing sleeve, the second electric cylinder is electrically connected with the controller.

3. A camshaft sprocket press-on device according to claim 2, characterized in that: The sliding structure includes a first electric cylinder, the first electric cylinder is arranged on the workbench, the piston rod of the first electric cylinder is fixedly connected with the slide, the first electric cylinder is electrically connected with the controller, and the workbench is provided with a guide rail for guiding the sliding of the slide.

4. A camshaft sprocket press-on device according to claim 3, wherein: The pressure mounting force detector is a pressure sensor, the pressure sensor is electrically connected with the controller, and the pressure sensor is arranged between the first electric cylinder and the slide.

5. A camshaft signal wheel press fitting device according to claim 4, characterized in that: The workbench is provided with an angle detector for detecting the angle of the signal wheel, the light ray of the angle detector is flush with the surface of the positioned signal wheel, and the angle detector is electrically connected with the controller.

6. A camshaft signal wheel press fitting device according to claim 5, characterized in that: The workbench is provided with a code scanning gun, and the code scanning gun is electrically connected with the controller.

7. A camshaft signal wheel press fitting device according to claim 6, characterized in that: The clamping structure includes a sleeve, one end of the sleeve is provided with an opening for installing a thimble, the thimble is rotatably connected with the sleeve, the inside of the sleeve is provided with a spring for clamping the thimble; The side wall of the positioning block is provided with a slot, the slot is provided with a mounting hole for mounting the sleeve, and the mounting hole is located on the convex block on the inner side of the positioning block for positioning the signal wheel.

8. A press mounting method based on the camshaft signal wheel press mounting apparatus of claim 7, characterized by, The method includes the following steps: S1, place the signal wheel in the positioning block, and the thimble on the positioning block is clamped against the signal wheel under the action of the spring; S2, the camshaft is placed on the support block, the positioning pin is inserted into the tail end center hole of the camshaft, and the positioning table is inserted into the slot at the tail end of the camshaft; S3, start the second electric cylinder, the second electric cylinder drives the front end pin to insert into the center hole at the front end of the camshaft, and the camshaft is pre-positioned; S4, start the first electric cylinder, the first electric cylinder drives the sliding seat to slide towards the support block, the sliding seat applies a pushing force to the camshaft through the fixed sleeve, the tail end of the camshaft pushes the positioning pin and the positioning sleeve to slide backward, the first spring and the second spring are compressed, and the camshaft is assembled with the signal wheel; the displacement sensor detects the sliding position of the sliding seat, and the pressure sensor detects the pressure applied by the first electric cylinder; S5, the first electric cylinder is retracted, and the installation angle of the signal wheel is detected by an angle detector; when the installation angle of the signal wheel meets the requirements, the second electric cylinder is retracted, the front end pin is withdrawn from the camshaft, and the press fitting is completed; when the installation angle of the signal wheel does not meet the requirements, the press fitting of the signal wheel and the camshaft is repaired by the staff.

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