Guide automatic reset positioning pin press-fitting device

Abstract

The utility model discloses a guide automatic reset positioning pin press-fitting device and relates to the technical field of automobile engine machining and production. Comprising an electric cylinder, a pressing head and a device body, the lower end of the electric cylinder is connected with the pressing head through an electric cylinder connecting flange, the pressing head is connected with a pressing rod used for punching a pin through a fixing rod, the pressing rod is sleeved with a rectangular spring and a spring positioning sleeve, the rectangular spring is located between the pressing head and the spring positioning sleeve, and the lower end of the pressing head sleeve is connected with two spring plungers. The device body is connected to the lower portion of the pressing head, the composite bearing is connected into the device body, the composite bearing is connected outside the pressing head sleeve in a matched mode, and the device body slides on the guide rail through the guide rail sliding block. The device is reasonable in structure and simple to operate. By means of the positioning pin press-fitting device, alignment of the positioning pin and the positioning pin hole can be guaranteed, the stability of the positioning pin press-fitting process is guaranteed, guiding automatic reset press-fitting of the positioning pin is achieved, then the influence of manual skills on press-fitting is overcome, the effect of guaranteeing the press-fitting quality is achieved, and labor is reduced to a certain degree.

Description

Technical Field

[0001] The utility model relates to the technical field of automobile engine processing and production, and particularly relates to a guiding automatic reset positioning pin pressing device. Background Technique

[0002] In the automobile engine processing production line, the engine cylinder head and the cylinder block adopt a common mechanical positioning method - pin hole positioning. It utilizes the matching accuracy between the pin and the pin hole to ensure the accurate relative position between the cylinder head and the cylinder block. During installation, pin holes are pre-processed on the cylinder block and the cylinder head, and then the pins are inserted into the pin holes. Through the fixing effect of the pins, the cylinder head and the cylinder block can be tightly combined together to ensure the sealing performance and working performance positioning of the engine. This positioning method has the advantages of high positioning accuracy, simple structure, and convenient installation. It can effectively prevent the cylinder head from shifting or rotating during installation and ensure the matching accuracy between the cylinder head and the cylinder block. At the same time, the pin positioning can also withstand a certain amount of axial and radial loads, enhancing the overall strength and rigidity of the engine. The positioning pin is pre-pressed on the cylinder block. Since a large installation resistance needs to be overcome during the installation of the positioning pin, a special tool is required during assembly. Currently, the commonly used methods for assembling the positioning pin are: manually hammering or using a manual pneumatic hammer to knock it into place, and the pressing quality is controlled by manual skills.

[0003] Although the above methods can all achieve the purpose of pressing the positioning pin, when manually pressing the positioning pin, it is impossible to fully ensure that the positioning pin enters the pin hole in the correct posture, and there are impacts in both pressing methods. If it is necessary to ensure that the pressing depth of the positioning pin is consistent and the quality is good, the above methods require a high degree of proficiency in manual skills from workers, the labor intensity of the workers is relatively large, and there is a potential hazard of inducing occupational diseases to a certain extent when using the pneumatic hammer for a long time. Content of the Utility Model

[0004] The purpose of the utility model is to solve the problems existing in the above-mentioned prior art and provide a guiding automatic reset positioning pin pressing device.

[0005] The technical solution adopted by the utility model to achieve the above purpose is: a guiding automatic reset positioning pin pressing device, which is characterized in that: it includes an electric cylinder, a pressure head, and a device body. The lower end of the electric cylinder is connected to the pressure head through an electric cylinder connection flange. The pressure head is connected to a pressure rod for stamping the pin through a fixing rod. The pressure rod passes through a pressure head sleeve. A rectangular spring and a spring positioning sleeve are sleeved on the pressure rod. The rectangular spring is located between the pressure head and the spring positioning sleeve. Two spring plungers for preventing the pin from falling are connected to the lower end of the pressure head sleeve. The device body is connected below the pressure head. A composite bearing is connected inside the device body. The composite bearing is fitted and connected to the outside of the pressure head sleeve. The device body slides on the guide rail through a guide rail slider.

[0006] The indenter is connected to the device body by screws. A connecting pad is connected in the upper circular groove of the indenter. The cylinder connecting flange is connected to the cylinder by screws.

[0007] The device body is fixed on the guide rail slider by screws. The lower end of the device body is connected with a flange cover for preventing the composite bearing from falling off by screws.

[0008] The side of the device body is connected with a proximity switch mounting plate. A proximity switch is connected on the proximity switch mounting plate. The proximity switch passes through a long hole opened on the device body.

[0009] The cylinder, proximity switch, guide rail, composite bearing, and spring plunger are internationally well-known brands.

[0010] The structure of the utility model is reasonable and the operation is simple. It can ensure the alignment of the positioning pin and the positioning pin hole, and ensure the smooth process of pressing the positioning pin, realizing the automatic reset pressing of the positioning pin with guidance, thereby overcoming the influence of manual skills on pressing, playing a role in ensuring the pressing quality, and reducing labor to a certain extent. Description of the Drawings

[0011] Figure 1 is a schematic structural diagram of the utility model (in the non-pressed state);

[0012] Figure 2 is Figure 1 a partial cross-sectional view;

[0013] Figure 3 is Figure 2 a partial cross-sectional view of the end face;

[0014] Figure 4 is Figure 1 an exploded view;

[0015] In the figure: 1. Cylinder; 2. Cylinder connecting flange; 3. Indenter; 4. Device body; 5. Indenter sleeve; 6. Guide rail; 7. Guide rail slider; 8. Proximity switch mounting plate; 9. Proximity switch; 10. Flange cover; 11. Spring plunger; 12. Rectangular spring; 13. Spring positioning sleeve; 14. Pin; 15. Fixed rod; 16. Pad; 17. Composite bearing; 18. Pressing rod. Detailed Description of the Preferred Embodiment Embodiment 1

[0016] As Figures 1-4The shown guiding automatic reset positioning pin pressing device, including an electric cylinder 1, a pressing head 3, and a device body 4. The lower end of the electric cylinder 1 is connected to the pressing head 3 through an electric cylinder connection flange 2. The pressing head 3 is connected to a pressing rod 18 for stamping a pin 14 through a fixing rod 15. The pressing rod 18 passes through a pressing head sleeve 5. A rectangular spring 12 and a spring positioning sleeve 13 are sleeved on the pressing rod 18. The rectangular spring 12 is located between the pressing head 3 and the spring positioning sleeve 13. The lower end of the pressing head sleeve 5 is connected to two spring plungers 11 for preventing the pin 14 from falling. The device body 4 is connected below the pressing head 3. A composite bearing 17 is connected inside the device body 4. The composite bearing 17 is fitted and connected to the outside of the pressing head sleeve 5. The device body 4 slides on the guide rail 6 through a guide rail slider 7.

[0017] The pressing head 3 is connected to the device body 4 by screws. A gasket 16 is connected in the upper circular groove of the pressing head 3. The electric cylinder connection flange 2 is connected to the electric cylinder 1 by screws.

[0018] The device body 4 is fixed to the guide rail slider 7 by screws. The lower end of the device body 4 is connected to a flange cover 10 for preventing the composite bearing 17 from falling by screws.

[0019] A proximity switch mounting plate 8 is connected to the side of the device body 4. A proximity switch 9 is connected to the proximity switch mounting plate 8. The proximity switch 9 passes through a long hole opened on the device body 4. Embodiment 2

[0020] The working process of the present utility model is as follows: In practical applications, the guide rail 6 and the electric cylinder 1 are fixed. As Figures 1-4 shown, first, place the workpiece at the position to be pressed. Align the pressing device with the hole to be assembled on the workpiece. Then, the electric cylinder 1 starts to work, driving the electric cylinder connection flange 2 to always keep in contact with the gasket 16 and push against the pressing head 3. The pressing head 3, the gasket 16, the device body 4, the fixing rod 15, the pressing rod 18, the pin 14, the guide rail slider 7, the composite bearing 17, the flange cover 10, the proximity switch mounting plate 8, and the proximity switch 9 always slide together on the guide rail 6 along with the work of the electric cylinder 1. The pressing head sleeve 5, the rectangular spring 12, the spring positioning sleeve 13, and the spring plunger 11 move together with the guide rail slider 7 when the pin 14 is not pressed into the accurate position of the workpiece. When the pin 14 is pressed into the accurate position of the workpiece, at this time, the pressing head sleeve 5, the rectangular spring 12, the spring positioning sleeve 13, and the spring plunger 11 rebound under the action of the rectangular spring 12 and return to the non-pressed position, and the pressing is completed. The side proximity switch 9 is used to detect the failure of the rectangular spring 12. If the rectangular spring 12 fails, the pressing head sleeve 5 cannot return to the non-pressed position.

Claims

1. Guided automatic reset positioning pin press-fitting device, characterized in that: The invention comprises an electric cylinder (1), a pressing head (3), and a device body (4); the lower end of the electric cylinder (1) is connected to the pressing head (3) via an electric cylinder connecting flange (2); the pressing head (3) is connected to a pressing rod (18) for punching a pin (14) via a fixing rod (15); the pressing rod (18) passes through a pressing head sleeve (5); a rectangular spring (12) and a spring positioning sleeve (13) are sleeved on the pressing rod (18); the rectangular spring (12) is located between the pressing head (3) and the spring positioning sleeve (13); the lower end of the pressing head sleeve (5) is connected to two spring plungers (11) for preventing the pin (14) from falling; the device body (4) is connected below the pressing head (3); a composite bearing (17) is connected inside the device body (4); the composite bearing (17) is matched and connected to the outside of the pressing head sleeve (5); the device body (4) slides on a guide rail (6) via a guide rail slider (7).

2. The guide automatic reset positioning pin press-fitting device according to claim 1, characterized in that: The pressure head (3) is connected to the device body (4) by means of screws, a connection pad (16) is provided in a circular groove at the upper end of the pressure head (3), and the electric cylinder connection flange (2) is connected to the electric cylinder (1) by means of screws.

3. The guide automatic reset positioning pin press-fitting device according to claim 1, characterized in that: The device body (4) is fixed to the guide rail slider (7) by means of screws, and the lower end of the device body (4) is connected to a flange cover (10) for preventing the composite bearing (17) from falling off by means of screws.

4. The guide automatic reset positioning pin press-fitting device according to any one of claims 1 to 3, characterized in that: The side of the device body (4) is connected to a proximity switch mounting plate (8), the proximity switch mounting plate (8) is connected to a proximity switch (9), and the proximity switch (9) passes through a long hole opened on the device body (4).

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