Cylinder cover positioning pin press-fitting positioning tool

Abstract

The utility model relates to a press-fitting positioning tool for a cylinder cover positioning pin. The press-fitting positioning tool comprises a base, a positioning disc and a pressing head capable of moving up and down which are sequentially arranged from bottom to top, a plurality of limiting columns are arranged on the base and are used for being inserted into a plurality of corresponding mounting holes in the cylinder cover; a guide sleeve and at least two positioning columns are arranged on the bottom face of the positioning disc, the positioning columns are evenly arranged in the circumferential direction at intervals, an inner hole of the guide sleeve upwards penetrates through the top face of the positioning disc, the positioning columns are used for being inserted into spring grooves of the cylinder cover, and positioning pins are used for being inserted into the guide sleeve. The lower portion of the pressing head is of an annular structure, and the bottom face of the annular structure is used for pressing the positioning pin. The press-fitting tool facilitates press-fitting of the positioning pin on the cylinder cover, reduces installation difficulty of the positioning pin, and improves production efficiency.

Description

Technical Field

[0001] This utility model relates to the field of rail vehicle component assembly equipment, and in particular to a cylinder head positioning pin press-fit positioning fixture. Background Technology

[0002] When assembling some cylinder heads, it is necessary to press locating pins into their predetermined installation positions on the cylinder head. Existing tooling limits the cylinder head's position and uses a small cylindrical press head to press the locating pins in place. Installing the locating pins using existing tooling requires first initially hammering the pins into the mounting grooves on the cylinder head, and then using a press to press them in place; this pressing process is complex, inefficient, and due to the small size of the locating pins, using the existing tooling is inconvenient and carries a high risk. Utility Model Content

[0003] The purpose of this utility model is to provide a cylinder head positioning pin press-fitting fixture, which makes it easier to press-fit the positioning pin on the cylinder head, reduces the installation difficulty of the positioning pin, and improves production efficiency.

[0004] The purpose of this utility model is achieved as follows: a cylinder head positioning pin press-fitting fixture includes a base, a positioning plate, and a press head that can move up and down, arranged sequentially from bottom to top; multiple limiting posts are provided on the base for insertion into corresponding mounting holes in the cylinder head; a guide sleeve and at least two positioning posts evenly spaced circumferentially are provided on the bottom surface of the positioning plate, the inner hole of the guide sleeve penetrates upward through the top surface of the positioning plate, each positioning post is used to be inserted into the spring groove of the cylinder head, and the guide sleeve is used to insert the positioning pin; the lower part of the press head is an annular structure, and the bottom surface of the annular structure is used to press-fit the positioning pin.

[0005] In a preferred embodiment of the present invention, a magnet is provided inside the side wall of the guide sleeve, or the guide sleeve can be interference-fitted with the positioning pin.

[0006] In a preferred embodiment of this utility model, two positioning posts are symmetrically arranged on the bottom surface of the positioning disk.

[0007] In a preferred embodiment of this utility model, a central hole is provided in the center of the positioning plate, and a plurality of through holes are also provided circumferentially on the positioning plate. The shape and size of the central hole of the positioning plate can match the shape and size of the central hole of the cylinder head, and the shape and size of the through holes can match the shape and size of the spring groove in the cylinder head. Furthermore, the central hole of the positioning plate can be vertically aligned with the central hole of the cylinder head, and the through holes can be vertically aligned with the corresponding spring groove.

[0008] In a preferred embodiment of the present invention, a mounting groove is provided on the top of the positioning disk, and a through hole is provided at the bottom of the mounting groove to penetrate the positioning disk downward. A connecting ring is provided on the upper side wall of the guide sleeve. The guide sleeve can pass through the through hole downward, and the connecting ring abuts against the mounting groove and can be connected to the positioning disk by fasteners.

[0009] In a preferred embodiment of the present invention, at least two insertion holes are provided on the positioning plate, and the top surface of the positioning post extends upward to form a connecting post with a reduced diameter, and the connecting post can be inserted and fixed in the corresponding insertion hole.

[0010] In a preferred embodiment of this utility model, a support plate is provided on the base, and each limiting post surrounds the outer periphery of the support plate.

[0011] In a preferred embodiment of this utility model, the support plate is a nylon base.

[0012] In a preferred embodiment of the present invention, the pressure head includes a connecting plate and a pressure ring arranged at intervals between the upper and lower parts, and a plurality of connecting ribs are circumferentially connected between the connecting plate and the pressure ring, and the pressure ring forms a ring structure.

[0013] In a preferred embodiment of the present invention, the cylinder head locating pin press-fitting fixture further includes a press machine, which includes a support frame and a drive device. The drive device and the base are arranged vertically on the support frame, and the drive end of the drive device is connected to the upper end of the press head.

[0014] As described above, the tooling of this utility model, through the cooperation of the base, positioning plate, and pressure head, eliminates the need for pre-installation of the positioning pins, allowing for direct pressing operations. This simplifies the process of installing positioning pins on the cylinder head, improving production efficiency and operational safety. The limiting posts on the base position the cylinder head; the guide sleeve guides and limits the positioning pins; each positioning post is inserted into the corresponding spring groove in the cylinder head, limiting the positioning plate; the lower part of the pressure head adopts a ring structure, resulting in more even pressure on the positioning plate, thus better preventing the positioning pins from tilting during pressing and facilitating smooth pressing. Attached Figure Description

[0015] The following figures are intended only to illustrate and explain the present invention and do not limit the scope of the present invention. Wherein:

[0016] Figure 1 This is a schematic diagram of the cylinder head structure.

[0017] Figure 2 This is a schematic diagram of the cylinder head positioning pin press-fit positioning fixture provided by this utility model.

[0018] Figure 3 A schematic diagram of the positioning disk provided by this utility model.

[0019] Figure 4 A schematic diagram of the structure of the guide sleeve provided by this utility model.

[0020] Figure 5A schematic diagram of the positioning column provided by this utility model.

[0021] Explanation of icon numbers:

[0022] 1. Base; 11. Limiting post; 12. Support plate;

[0023] 2. Positioning plate; 21. Center hole of positioning plate; 22. Through hole; 23. Mounting groove; 231. Through hole; 24. Insertion hole;

[0024] 3. Guide sleeve; 31. Connecting ring;

[0025] 4. Positioning post; 41. Connecting post;

[0026] 5. Pressure head; 51. Connecting plate; 52. Pressure ring; 53. Connecting rib;

[0027] 6. Cylinder head; 61. Center hole; 62. Annular groove; 63. Spring groove; 64. Locating pin mounting groove; 641. Outer peripheral surface of the groove; 65. Annular stepped surface; 66. Mounting hole; 67. Mounting hole. Detailed Implementation

[0028] To provide a clearer understanding of the technical features, objectives, and effects of this utility model, the specific embodiments of this utility model are now described with reference to the accompanying drawings.

[0029] like Figures 1 to 5 As shown, this embodiment provides a cylinder head positioning pin press-fitting fixture, including a base 1, a positioning plate 2, and a press head 5 arranged sequentially from bottom to top; the base 1 is provided with a plurality of limiting posts 11 for insertion into a plurality of corresponding mounting holes 66 in the cylinder head 6; the bottom surface of the positioning plate 2 is provided with a guide sleeve 3 and at least two positioning posts 4 evenly spaced circumferentially, the inner hole of the guide sleeve 3 penetrates upward through the top surface of the positioning plate 2, each positioning post 4 is used to be inserted into the spring groove 63 of the cylinder head 6, and the guide sleeve 3 is used to insert the positioning pin; the lower part of the press head 5 is a ring structure, and the bottom surface of the ring structure is used to press the positioning pin.

[0030] In use, the cylinder head 6 is placed on the base 1 with the top facing down. Multiple limiting pins 11 are inserted into the corresponding mounting holes 66 on the cylinder head 6 to position the cylinder head 6. The positioning plate 2 is placed inside the cylinder head 6, and the bottom surface of the positioning plate 2 will abut against the annular stepped surface 65 inside the cylinder head 6. The inner hole of the guide sleeve 3 corresponds vertically to the positioning pin mounting groove 64 on the cylinder head 6, and the bottom surface of the guide sleeve 3 abuts against the outer peripheral surface 641 of the groove opening of the positioning pin mounting groove 64. The positioning pin is inserted into the guide sleeve 3, at which point the upper part of the positioning pin protrudes from the guide sleeve 3. Then, by moving the pressure head 5 downward, the positioning pin can be pressed into the positioning pin mounting groove 64 of the cylinder head 6, thus achieving the press-fitting of the positioning pin.

[0031] Therefore, the tooling in this embodiment, through the cooperation of the base 1, the positioning plate 2, and the pressure head 5, eliminates the need for pre-installation of the positioning pins, allowing for direct pressing operations. This simplifies the process of installing the positioning pins on the cylinder head 6, improving production efficiency and operational safety. The limiting post 11 on the base 1 can position the cylinder head 6; the guide sleeve 3 guides and limits the positioning pins; each positioning post 4 is inserted into the corresponding spring groove 63 on the cylinder head 6 during use, limiting the positioning plate 2; the lower part of the pressure head 5 adopts a ring structure, resulting in more uniform pressure on the positioning plate 2, thus better preventing the positioning pins from tilting during the pressing process and facilitating smooth pressing of the positioning pins.

[0032] The aforementioned positioning disc 2 has a disc structure, and the guide sleeve 3 has a cylindrical structure with openings at both ends. The inner diameter of the guide sleeve 3 should match the outer diameter of the positioning pin. In some embodiments, during operation, the positioning pin to be installed is first inserted into the guide sleeve 3, and then the positioning disc 2 is placed on the cylinder head 6 for pressing. To prevent the positioning pin from falling out of the guide sleeve 3, a magnet can be provided inside the side wall of the guide sleeve 3, so that the positioning pin, being made of metal, can be attracted to the guide sleeve 3 after being inserted; alternatively, the guide sleeve 3 and the positioning pin can be fitted with an interference fit, and the interference amount should be much smaller than the interference amount between the positioning pin mounting groove 64 on the cylinder head 6 and the positioning pin.

[0033] Furthermore, the number of positioning pins 4 can be determined as needed. For example, in this embodiment, two positioning pins 4 are symmetrically arranged on the bottom surface of the positioning plate 2. The axes of the two positioning pins 4 are parallel to each other and are both vertically arranged. The shape and size of the positioning pins 4 match the shape and size of the original spring groove 63 on the cylinder head 6. Under the limitation of the two positioning pins 4, if there is any shaking, the positioning plate 2 moves synchronously relative to the cylinder head 6 to be processed (i.e., the two move together) to prevent the positioning pins from tilting during the pressing process.

[0034] In some embodiments, the positioning disk 2 has a center hole 21, and a plurality of through holes 22 are provided circumferentially on the positioning disk 2. The shape and size of the center hole 21 can match the shape and size of the center hole 61 of the cylinder head 6, and the shape and size of the through holes 22 can match the shape and size of the spring groove 63 in the cylinder head 6. The center hole 21 of the positioning disk can be vertically aligned with the center hole 61 of the cylinder head 6, and the through holes 22 can be vertically aligned with the corresponding spring groove 63.

[0035] The cylinder head 6 has a circular center hole 61 and a circular cross-section for the spring groove 63. Correspondingly, the positioning plate's center hole 21 is also circular, as are the through holes 22. The positioning pins 4 are cylindrical. After placing the cylinder head 6 on the base 1 and the positioning plate 2 inside the cylinder head 6, the positioning plate's center hole 21 should be aligned with the cylinder head 6's center hole 61, each through hole 22 should be aligned with its corresponding spring groove 63, and each positioning pin 4 should be inserted into its corresponding spring groove 63. The positioning plate's center hole 21 and each through hole 22 make it easier for operators to observe whether the positioning plate 2 and the cylinder head 6 are aligned, while also reducing weight.

[0036] In some embodiments, the guide sleeve 3 is detachably connected to the positioning plate 2, and the positioning pin 4 is detachably connected to the positioning plate 2. The guide sleeve 3 and positioning pin 4 are available in various models to suit different specifications of cylinder head 6 for press-fitting positioning pins. For easier connection between the guide sleeve 3 and positioning pin 4 and the positioning plate 2, refer to... Figures 2 to 5 For example, it can be implemented like this:

[0037] A mounting groove 23 is provided on the top of the positioning plate 2. A through hole 231 is provided at the bottom of the mounting groove 23 to penetrate the positioning plate 2 downwards. A connecting ring 31 is provided on the upper side wall of the guide sleeve 3. The guide sleeve 3 can pass through the through hole 231 downwards, and the connecting ring 31 abuts against the mounting groove 23 and can be connected to the positioning plate 2 by fasteners.

[0038] At least two insertion holes 24 are also provided on the positioning plate 2. The top surface of the positioning post 4 extends upward to form a connecting post 41 with a reduced diameter. The connecting post 41 can be inserted and fixed in the corresponding insertion hole 24.

[0039] In this embodiment, the connecting ring 31 is a circular ring, and the connecting posts 41 are both cylindrical. The insertion hole 24 generally penetrates the positioning plate 2 vertically. After installation, the top surface of the connecting ring 31 is basically flush with the top surface of the positioning plate 2, and the top surface of the connecting post 41 is basically flush with or slightly lower than the top surface of the positioning plate 2. Of course, the connection between the guide sleeve 3 and the positioning plate 2 is not limited to bolt connection, and the connection between the positioning post 4 and the positioning plate 2 is not limited to interference fit. Other connection methods can also be used as needed. This embodiment is only for illustrative purposes.

[0040] In some embodiments, a support plate 12 is provided on the base 1, and each limiting post 11 surrounds the outer periphery of the support plate 12. Generally, the base 1 is a rectangular plate, and the support plate 12 is a circular plate. The support plate 12 is preferably made of nylon. When in use, the cylinder head 6 is placed on the support plate 12. During the pressing process, the nylon support plate 12 can provide a certain degree of protection for the cylinder head 6 and prevent damage.

[0041] Furthermore, refer to Figure 2The pressure head 5 includes a connecting plate 51 and a pressure ring 52 arranged at intervals between the upper and lower parts. Multiple connecting ribs 53 are circumferentially connected between the connecting plate 51 and the pressure ring 52, and the pressure ring 52 forms a ring structure.

[0042] The connecting plate 51 is a circular plate, and the pressure ring 52 is a circular ring; their outer diameters can be the same or different. In this embodiment, the outer diameter of the pressure ring 52 is preferably larger than the diameter of the connecting plate 51, and each connecting rib 53 is an inclined rib. The large contact radius below the pressure head 5 results in more uniform pressure on the positioning plate 2, further preventing the positioning plate 2 from tilting during operation. This shape of pressure head 5 can also be used for pressing leather cups.

[0043] Furthermore, the cylinder head locating pin press-fitting fixture also includes a press, which includes a support frame and a drive unit. The drive unit and the base 1 are arranged vertically on the support frame, and the drive end of the drive unit is connected to the upper end of the press head 5.

[0044] The drive device can be, for example, a cylinder, with a vertically arranged piston rod and the bottom end of the piston rod forming the aforementioned drive end, for detachably connecting the connecting plate 51 of the pressure head 5. The base 1 can be detachably connected to the bottom of the support frame via fasteners.

[0045] The tooling used in this application is primarily for the cylinder head 6 of a parking cylinder. The parking cylinder has an existing structure, including a cylinder body and a cylinder head 6. A piston and spring are located within the cylinder body. Both the cylinder body and cylinder head 6 have a central hole (through hole) and mounting holes. The cylinder head 6 has a central hole 61 at its center. The bottom of the cylinder head 6 has an annular groove 62 surrounding its central hole 61. The bottom of the annular groove 62 has multiple spring grooves 63 arranged circumferentially at uniform intervals for installing springs. The aforementioned annular stepped surface 65 is formed on the sidewall of the annular groove 62. A positioning pin mounting groove 64 is also provided within the annular groove 62, located near the sidewall of the annular groove 62, for pressing in a positioning pin. This positioning pin serves to align the cylinder head 6 and the cylinder body vertically. Four mounting holes 66 (bolt holes) are also provided around the cylinder head 6. The number of the aforementioned limiting posts 11 is the same as the number of mounting holes 66, also four. Four mounting holes 67 are provided around the cylinder head 6. Each mounting hole 67 is arranged close to each mounting hole 66. The diameter of the mounting hole 67 is smaller than that of the mounting hole 66. Each mounting hole 67 is used to connect and fix the cylinder head 6 to the cylinder block, and each mounting hole 66 is used to connect and fix the cylinder to the intermediate body.

[0046] Furthermore, the pressing process of this tooling is as follows:

[0047] (1) Select the matching guide sleeve 3 and positioning pin 4 according to the cylinder head 6 model to be processed and assemble them onto the positioning plate 2.

[0048] (2) Mount the base 1 and the pressure head 5 onto the press. At this time, the pressure head 5 is arranged coaxially with the support plate 12.

[0049] (3) Align the limiting post 11 with the four mounting holes 66 (bolt holes) at the four corners of the cylinder head 6, and place the cylinder head 6 on the support plate 12; in this step, the cylinder head 6 is placed on the support plate 12 with the top of the cover facing down and the groove of the annular groove 62 facing up.

[0050] (4) Insert the positioning pin into the guide sleeve 3.

[0051] (5) Pay attention to the position of the positioning pin mounting groove 64 on the cylinder head 6, place the positioning plate 2 on the cylinder head 6, and ensure that each positioning pin 4 on the positioning plate 2 is engaged in the original spring groove 63 on the cylinder head 6; at this time, there is a gap between the positioning pin 4 and the bottom of the spring groove 63, each through hole 22 on the positioning plate 2 is aligned with the other spring grooves 63, and the upper part of the positioning pin extends out of the guide sleeve 3 and is located outside the top surface of the positioning plate 2.

[0052] (6) The pressure head 5 is moved down by the drive device, and the bottom surface of the pressure ring 52 of the pressure head 5 abuts against the positioning pin and is pressed downward.

[0053] The entire press-fitting process can reduce the difficulty of installing the locating pins on cylinder head 6, improve production efficiency, and reduce operational risks.

[0054] The above are merely illustrative embodiments of this utility model and are not intended to limit the scope of this utility model. Any equivalent changes and modifications made by those skilled in the art without departing from the concept and principles of this utility model should fall within the protection scope of this utility model.

Claims

1. A cylinder head dowel press-fit positioning tool, characterized by, It includes a base, a positioning plate, and a pressure head that can move up and down, arranged sequentially from bottom to top; The base is provided with multiple limiting posts for insertion into corresponding mounting holes in the cylinder head; the bottom surface of the positioning plate is provided with a guide sleeve and at least two positioning posts evenly spaced circumferentially, the inner hole of the guide sleeve extends upward through the top surface of the positioning plate, each positioning post is used to be inserted into the spring groove of the cylinder head, and the guide sleeve is used to insert a positioning pin; the lower part of the pressure head is a ring structure, and the bottom surface of the ring structure is used to press the positioning pin.

2. The cylinder head locating pin press-fitting fixture as described in claim 1, characterized in that, A magnet is provided inside the side wall of the guide sleeve, or the guide sleeve can be interference-fitted with the locating pin.

3. The cylinder head locating pin press-fitting fixture as described in claim 1, characterized in that, Two positioning posts are symmetrically arranged on the bottom surface of the positioning disk.

4. The cylinder head locating pin press-fitting fixture as described in claim 1, characterized in that, The positioning disk has a central hole at its center, and multiple through holes are also provided circumferentially on the positioning disk. The shape and size of the central hole of the positioning disk can match the shape and size of the central hole of the cylinder head, and the shape and size of the through holes can match the shape and size of the spring groove in the cylinder head. Furthermore, the central hole of the positioning disk can be vertically aligned with the central hole of the cylinder head, and the through holes can be vertically aligned with the corresponding spring groove.

5. The cylinder head locating pin press-fitting fixture as described in claim 1, characterized in that, An installation groove is provided on the top of the positioning plate, and a through hole is provided at the bottom of the installation groove to penetrate the positioning plate downward. A connecting ring is provided on the upper side wall of the guide sleeve. The guide sleeve can pass through the through hole downward, and the connecting ring abuts against the installation groove and can be connected to the positioning plate by fasteners.

6. The cylinder head locating pin press-fitting fixture as described in claim 1, characterized in that, The positioning plate is also provided with at least two insertion holes, and the top surface of the positioning post extends upward to form a connecting post with a reduced diameter. The connecting post can be inserted and fixed in the corresponding insertion hole.

7. The cylinder head locating pin press-fitting fixture as described in claim 1, characterized in that, A support plate is provided on the base, and each of the limiting posts surrounds the outer periphery of the support plate.

8. The cylinder head locating pin press-fitting fixture as described in claim 7, characterized in that, The support plate is a nylon base.

9. The cylinder head locating pin press-fitting fixture as described in claim 1, characterized in that, The pressure head includes a connecting plate and a pressure ring arranged at intervals between the upper and lower parts. Multiple connecting ribs are circumferentially connected between the connecting plate and the pressure ring, and the pressure ring constitutes the ring structure.

10. The cylinder head locating pin press-fitting fixture as described in claim 1, characterized in that, The cylinder head locating pin press-fitting fixture also includes a press machine, which includes a support frame and a drive device. The drive device and the base are arranged vertically on the support frame, and the drive end of the drive device is connected to the upper end of the press head.

Images