An automatic press-fitting press head assembly and press-fitting equipment
By designing an automatic press head assembly, the movement and press-fitting of sliding bearings are integrated, solving the problems of complexity and separation damage in existing equipment, improving assembly accuracy and efficiency, and reducing costs and failure rates.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- DELPHI DIESEL SYST YANTAI CO LTD
- Filing Date
- 2025-07-28
- Publication Date
- 2026-07-07
AI Technical Summary
Existing automated assembly equipment suffers from problems such as complex equipment, large footprint, high cost, poor assembly accuracy and stability during the movement and pressing of sliding bearings, and secondary damage is easily caused when the pressure head separates from the front cover plate.
Design an automatic pressing head assembly, including a connecting seat, pressing head body, pressing head sleeve, return spring, O-ring and rolling element. By setting up a pressing positioning part, support leg and ejector pin and other structures, the sliding bearing movement and pressing are integrated, and damage is prevented when the pressing head is separated from the front cover plate.
It simplifies the equipment structure, improves assembly accuracy and stability, reduces costs, reduces manual intervention, improves assembly efficiency and quality, and reduces assembly failures and rework rates.
Smart Images
Figure CN224464085U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to an automatic pressing head assembly and pressing equipment, belonging to the field of assembly tooling technology. Background Technology
[0002] The pressing of the diesel pump front cover plate and the sliding bearing is a key process in the diesel pump manufacturing process, which plays an important role in ensuring the diesel pump's sealing performance, reducing wear, and maintaining normal operating pressure.
[0003] While existing automated assembly equipment can assemble the front cover plate and the sliding bearing, it has the following drawbacks:
[0004] First, existing equipment typically uses different devices to perform the movement and pressing of the sliding bearing separately. Specifically, the moving device is responsible for accurately moving the sliding bearing to the designated position, while the pressing device is responsible for firmly pressing the front cover plate to the sliding bearing, resulting in complex equipment, large footprint, and high cost. Furthermore, because movement and pressing are performed by different devices, the accuracy and stability of the assembly process may be affected.
[0005] Secondly, problems can easily occur during the separation process of the pressure head and the front cover plate after the sliding bearing is pressed into the front cover plate. When the pressure head rises, it often lifts the front cover plate, which not only requires the operator to manually reposition the front cover plate, increasing the workload and time cost of manual operation, but may also cause secondary damage to the front cover plate and the sliding bearing, affecting the consistency and stability of the assembly quality.
[0006] Therefore, an automatic press head assembly is needed to solve the above-mentioned problems in the prior art. Utility Model Content
[0007] The purpose of this utility model is to provide a new technical solution to improve or solve the technical problems existing in the prior art as described above.
[0008] The technical solution provided by this utility model is as follows: An automatic pressing head assembly includes a connecting seat, a pressing head body, a pressing head sleeve, a return spring, an O-ring, and a rolling element; the pressing head body is connected to the connecting seat; the return spring and the pressing head sleeve are both sleeved on the outside of the pressing head body; one end of the return spring is connected to the connecting seat, and the other end of the return spring is connected to the pressing head sleeve; the end of the pressing head sleeve away from the return spring is also provided with an annular groove, and the bottom of the annular groove is provided with a plurality of ball holes that radially penetrate the wall of the pressing head sleeve, and the rolling element is provided in the ball holes; the O-ring is disposed in the annular groove to limit the rolling element in the ball holes.
[0009] Based on the above technical solution, the present invention can be further improved as follows.
[0010] Furthermore, it also includes a press-fit positioning part, which is located on the outside of the press head sleeve. One end of the press-fit positioning part is connected to the connecting seat, and the other end extends axially.
[0011] The beneficial effect of adopting the above-mentioned further solution is that by setting the press-fit positioning part, the press-fit positioning part can be accurately pressed on the outside of the front cover plate when pressing the bearing, preventing the press head body and bearing from tilting during the press-fit process, ensuring the verticality of the bearing press-fit, and reducing the bearing damage or assembly defects caused by press-fit tilting.
[0012] Furthermore, the press-fitting positioning part comprises multiple support legs, which are evenly distributed around the outside of the press head sleeve along the circumferential direction.
[0013] The beneficial effect of adopting the above-mentioned further solution is that by using multiple support legs evenly distributed along the circumferential direction as press-fit positioning parts, the front cover plate can be evenly pressed from multiple directions. Compared with the circumferential sleeve, the contact area with the front cover plate can be reduced, thus reducing the probability of the front cover plate being lifted when the press head is picked up.
[0014] Furthermore, the support leg has a hollow inner cavity, in which a pressure head ejector pin is movably disposed. One end of the pressure head ejector pin is connected by a top pin spring, and the other end of the pressure head ejector pin can extend or retract into the inner cavity under the elastic force of the top pin spring.
[0015] The beneficial effect of adopting the above-mentioned further solution is that when the pressure head presses down to press the sliding bearing into place, the top pin spring is compressed. When the pressure head rises, the top pin spring rebounds and releases, ejecting the pressure head ejector pin from the inner cavity and pressing it against the front cover plate. This prevents the front cover plate from being lifted when the pressure head is lifted, effectively solving the problem of the front cover plate being lifted during the separation of the pressure head and the front cover plate. This reduces manual operation intervention, improves assembly efficiency and quality, and reduces assembly failures and rework rates caused by the front cover plate being lifted.
[0016] Furthermore, the press-fit positioning part is a limiting sleeve sleeved on the outside of the press head sleeve.
[0017] The beneficial effect of adopting the above-mentioned further solution is that using the limiting sleeve as the press-fit positioning part has a simple structure and high strength. It can provide stable support and positioning for the press head during the press-fit process, ensuring the accurate relative position of the press head and the front cover plate. At the same time, the limiting sleeve can protect the press head sleeve.
[0018] Furthermore, the pressure head body is also provided with a first limiting shoulder, which is used to limit the bearing to the upper limit position of the pressure head body.
[0019] The beneficial effect of adopting the above-mentioned further solution is that the setting of the first limiting shoulder can control the upper limit position of the bearing on the pressure head body, ensuring the accuracy of the initial position of the bearing during the pressing process.
[0020] Furthermore, the pressure head body is also provided with a second limiting shoulder, which is used to limit the lower limit of the downward movement of the pressure head sleeve.
[0021] The beneficial effect of adopting the above-mentioned further solution is that the pressure head sleeve is connected to the lower left of the connection by a return spring. Under the action of gravity, the pressure head sleeve will move downward along the axis. The second limiting shoulder and the shoulder surface of the pressure head sleeve form an axial hard stop structure. When the pressure head sleeve moves down to contact the second limiting shoulder surface, the pressure head sleeve stops moving, ensuring that the rolling element and O-ring at the end of the pressure head sleeve are in the same clamping position on the sliding bearing during each pickup, thus ensuring the assembly effect.
[0022] Furthermore, it also includes a fault-prevention block, which is disposed on the connector.
[0023] The beneficial effect of adopting the above-mentioned further solution is that the error-proof block is used to distinguish the pressure head model. During the assembly process, the error-proof block can quickly identify and select the correct pressure head model, avoiding assembly errors and part damage caused by using the wrong pressure head model, and improving the accuracy and efficiency of assembly.
[0024] An automatic bearing press-fitting device includes a worktable with a cover plate fixture on the worktable, and an automatic press-fitting head assembly located above the cover plate fixture or movable above the cover plate fixture.
[0025] The technical solution provided by this utility model has the following advantages compared with the prior art:
[0026] 1. The automatic pressing head assembly of this utility model can realize the integrated operation of sliding bearing movement and pressing, which not only simplifies the equipment structure and reduces costs, but also improves assembly accuracy and stability.
[0027] 2. By setting up a press-fit positioning part, the tilting of the press head body and bearing during the press-fitting process can be prevented, ensuring the verticality of the bearing press-fitting and reducing bearing damage or assembly defects caused by press-fitting tilt.
[0028] 3. By setting a top ejector pin for the pressure head, the problem of the front cover being lifted during the separation of the pressure head and the front cover plate is solved, reducing manual intervention, improving assembly efficiency and quality, and reducing assembly failures and rework rates caused by the front cover being lifted. Attached Figure Description
[0029] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.
[0030] Figure 1 This is a three-dimensional structural diagram of the automatic pressing head assembly of this utility model;
[0031] Figure 2 This is a schematic diagram showing the position and structure of the annular groove and ball hole on the pressure head sleeve of this utility model;
[0032] Figure 3 For the present utility model Figure 1 A-direction projection diagram;
[0033] Figure 4 For the present utility model Figure 1 A bottom view;
[0034] Figure 5 For the present utility model Figure 3 BB-direction sectional view;
[0035] Figure 6 This is a cross-sectional view of the automatic pressing head assembly of this utility model when the sliding bearing is moving.
[0036] Figure 7 For the present utility model Figure 6 Enlarged view of part C;
[0037] Figure 8 This is a schematic diagram of the automatic pressing head assembly of this utility model when the sliding bearing is assembled onto the cover plate;
[0038] Figure 9 For the present utility model Figure 8 A sectional view;
[0039] Figure 10 This is a schematic diagram of the pressing equipment of this utility model.
[0040] In the picture:
[0041] 100. Pressure head assembly;
[0042] 101. Connecting seat; 102. Press head body; 103. Press head sleeve; 104. O-ring; 105. Return spring; 106. Annular groove; 107. Ball hole; 108. Support leg; 109. Press head ejector pin; 110. Top pin spring; 111. First limiting shoulder; 112. Second limiting shoulder; 113. Anti-misalignment block; 114. Rolling element; 115. Inner cavity;
[0043] 200. Workbench;
[0044] 300. Cover plate tooling;
[0045] 400. Front cover plate;
[0046] 500. Sliding bearing. Detailed Implementation
[0047] The serial numbers assigned to components in this document, such as "first" and "second," are used only to distinguish the objects described and do not imply any priority in order or any specific technical meaning. Furthermore, the concepts of "connection" and "linkage" mentioned in this application, unless otherwise specified, are considered to include both direct connection (linkage) and indirect connection (linkage).
[0048] When interpreting the description of this application, it should be clarified that terms such as "upper," "lower," "front," "back," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," indicating directions or positional relationships, are based on the perspective and layout shown in the accompanying drawings. They are intended to facilitate explanation and simplify the description process, and are not absolute limitations on the actual location, construction method, or operating mode of the described device or element. Therefore, these terms should not be construed as restrictive interpretations of the content of this application.
[0049] The principles and features of this utility model are described below with reference to examples. The examples are only used to explain this utility model and are not intended to limit the scope of this utility model.
[0050] like Figure 1-9As shown, the technical solution provided by this utility model is as follows: An automatic pressing head assembly 100 includes a connecting seat 101, a pressing head body 102, a pressing head sleeve 103, a return spring 105, an O-ring 104, and a rolling element 114; the pressing head body 102 has a cylindrical structure and is connected to the connecting seat 101; the return spring 105 and the pressing head sleeve 103 are both sleeved on the outside of the pressing head body 102; one end of the return spring 105 is connected to the connecting seat 101, and the... The other end of the return spring 105 is connected to the pressure head sleeve 103. The pressure head sleeve 103 can move along the axial direction to compress the return spring 105. The end of the pressure head sleeve 103 away from the return spring 105 is also provided with an annular groove 106. The bottom of the annular groove 106 is provided with a plurality of ball holes 107 that radially penetrate the wall of the pressure head sleeve 103. Each ball hole 107 is provided with a rolling element 114. The rolling element 114 is radially limited by an O-ring 104 provided in the annular groove 106.
[0051] When moving the sliding bearing 500 using the automatic press head assembly 100, the press head body 102 must first be inserted into the inner hole of the sliding bearing 500 from top to bottom. Since the O-ring 104 surrounds the rolling element 114, the sliding bearing 500 pushes the rolling element 114 to move radially, thus fitting the sliding bearing 500 into the gap between the rolling element 114 and the press head body 102. With the elasticity of the O-ring 104, the sliding bearing 500 is firmly clamped, ensuring that the bearing remains stable and does not fall off during the movement of the press head assembly 100.
[0052] The rolling element 114 can be a metal ball, such as a steel ball.
[0053] The press head assembly 100 also includes a press positioning part, which is located on the outside of the press head sleeve 103. One end of the press positioning part is connected to the connecting seat 101, and the other end extends axially. During the press-fitting of the bearing, the end of the press positioning part away from the connecting seat 101 is pressed against the outside of the front end cover plate 400 to prevent press-fitting tilting.
[0054] In this embodiment, the press-fit positioning part comprises multiple support legs 108, which are evenly distributed around the outside of the press head sleeve 103 along the circumferential direction. In this embodiment, three support legs 108 are provided, but more or fewer can be used. The three support legs 108, evenly distributed around the circumferential direction, can apply uniform pressure to the front cover plate 400 from multiple directions.
[0055] The support leg 108 has a hollow inner cavity 115, in which a pressure head ejector pin 109 is movably disposed. One end of the pressure head ejector pin 109 is connected by a top pin spring 110, and the other end of the pressure head ejector pin 109 can extend or retract into the inner cavity 115 under the elastic force of the top pin spring 110. When the pressure head presses down to press the sliding bearing 500 into place, the top pin spring 110 is compressed. When the pressure head rises, the top pin spring 110 rebounds and releases, ejecting the pressure head ejector pin 109 from the inner cavity 115 and pressing down on the front end cover plate 400 to prevent the front end cover plate 400 from being lifted when the pressure head is picked up.
[0056] In another feasible embodiment, the press-fit positioning part can be a limiting sleeve fitted around the outside of the press head sleeve 103. Using a limiting sleeve as the press-fit positioning part is simple in structure and has high strength. It can provide stable support and positioning for the press head during the press-fitting process, ensuring the accurate relative position of the press head and the front cover plate 400. At the same time, the limiting sleeve can protect the press head sleeve 103.
[0057] In this embodiment, the pressure head body 102 is further provided with a first limiting shoulder 111, which is used to limit the bearing to the upper limit position of the pressure head body 102. The setting of the first limiting shoulder 111 can control the upper limit position of the bearing on the pressure head body 102, ensuring the accuracy of the initial position of the bearing during the press-fitting process.
[0058] The pressure head body 102 is also provided with a second limiting shoulder 112, which is used to limit the lower limit of the downward movement of the pressure head sleeve 103. The pressure head sleeve 103 is connected to the lower left of the connection by a return spring 105. Under the action of gravity, the pressure head sleeve 103 will move downward along the axis. The second limiting shoulder 112 and the shoulder surface of the pressure head sleeve 103 form an axial hard stop structure. When the pressure head sleeve 103 moves down to contact the surface of the second limiting shoulder 112, the pressure head sleeve 103 stops moving. The mechanical hard stop replaces the spring soft stop, ensuring that the clamping position of the rolling element 114 and O-ring 104 at the end of the pressure head sleeve 103 on the sliding bearing 500 is consistent each time it is picked up, thus ensuring the assembly effect.
[0059] The pressure head assembly 100 also includes a mis-proof block 113, which is disposed on the connecting seat 101. The mis-proof block 113 is used to distinguish the pressure head model. During the assembly process, the correct pressure head model can be quickly identified and selected through the mis-proof block 113, avoiding assembly errors and part damage caused by using the wrong model of pressure head, and improving the accuracy and efficiency of assembly.
[0060] like Figure 10As shown, an automatic bearing press-fitting device includes a worktable 200, on which a cover plate fixture 300 is provided, and also includes the automatic press-fitting head assembly 100, which is located above the cover plate fixture 300 or can be moved to the top of the cover plate fixture 300.
[0061] Taking the installation of a sliding bearing 500 into the front cover plate 400 of a diesel pump as an example, the working method of the automatic bearing press-fitting equipment of this utility model is introduced, and the steps are as follows:
[0062] (1) The operator installs the diesel pump front cover plate 400 on the cover plate fixture 300 of the workbench 200 and places the lubricated sliding bearing 500 on the bearing holding fixture.
[0063] (2) Start the equipment control system, and the bearing holding fixture moves along the guide rail to the material taking position directly below the pressure head assembly 100;
[0064] (3) Reference Figure 6 and Figure 7 As shown, the pressure head assembly 100 descends, and the lower end of the pressure head body 102 gradually inserts into the inner hole of the sliding bearing 500. During this process, the sliding bearing 500 moves axially until the rolling element 114 contacts it. The rolling element 114 moves radially outward under the pressure of the sliding bearing 500. With the help of the elastic force of the O-ring 104, the sliding bearing 500 is clamped in the gap between the rolling element 114 and the pressure head body 102. When the upper end of the sliding bearing 500 contacts the first limiting shoulder 111, the pressure head assembly 100 stops descending.
[0065] (4) Drive the pressure head assembly 100 to rise, and the pressure head assembly 100 drives the sliding bearing 500 to rise to a safe height and move above the cover plate fixture 300. At the same time, drive the bearing to return the fixture to its original position.
[0066] (5) Reference Figure 8 and Figure 9 As shown, the pressure head assembly 100 is driven to descend again. The pressure head body 102 drives the sliding bearing 500 to be vertically inserted into the bearing hole of the front cover plate 400. During the descent of the pressure head assembly 100, the pressure head sleeve 103 is blocked by the cover plate and compresses the return spring 105. The rolling element 114 moves axially with the pressure head sleeve 103 and automatically releases the sliding bearing 500. During the descent of the pressure head assembly 100, the pressure head ejector pin 109 will compress the ejector pin spring 110 and retract into the inner cavity 115. When the lower end of the support leg 108 contacts the upper end face of the front cover plate 400, the pressure head assembly 100 stops descending. At this time, the sliding bearing 500 has been pressed into the front cover plate 400.
[0067] (6) Drive the pressure head assembly 100 to rise again. The pressure head ejector pin 109 pops out under the action of the ejector pin spring 110 and presses against the front cover plate 400, separating the pressure head body 102 from the front cover plate 400, so as to prevent the front cover plate 400 from being lifted.
[0068] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.
Claims
1. An automatic press-fit press head assembly, characterized by, It includes a connecting seat (101), a pressure head body (102), a pressure head sleeve (103), a return spring (105), an O-ring (104), and a rolling element (114). The pressure head body (102) is connected to the connecting seat (101); The reset spring (105) and the pressure head sleeve (103) are both sleeved on the outside of the pressure head body (102); One end of the return spring (105) is connected to the connecting seat (101), and the other end of the return spring (105) is connected to the pressure head sleeve (103). The end of the pressure head sleeve (103) away from the return spring (105) is also provided with an annular groove (106). The bottom of the annular groove (106) is provided with a plurality of ball holes (107) that radially penetrate the wall of the pressure head sleeve (103). The ball holes (107) are provided with the rolling element (114). The O-ring (104) is disposed in the annular groove (106) to limit the rolling element (114) in the ball hole (107).
2. The automatic press-fit press head assembly of claim 1, wherein, It also includes a press-fit positioning part, which is located on the outside of the press head sleeve (103). One end of the press-fit positioning part is connected to the connecting seat (101), and the other end extends axially.
3. The automatic press-fit press head assembly of claim 2, wherein, The press-fit positioning part consists of multiple support legs (108), which are evenly distributed around the outside of the press head sleeve (103) along the circumferential direction.
4. The automatic press-fit press head assembly of claim 3, wherein, The support leg (108) has a hollow inner cavity (115), in which a pressure head ejector pin (109) is movably disposed. One end of the pressure head ejector pin (109) is connected by a top pin spring (110), and the other end of the pressure head ejector pin (109) can extend or retract into the inner cavity (115) under the elastic force of the top pin spring (110).
5. The automatic press-fit press head assembly of claim 2, wherein, The press-fit positioning part is a limiting sleeve sleeved on the outside of the press head sleeve (103).
6. The automatic press-fit press head assembly of claim 1, wherein, The pressure head body (102) is also provided with a first limiting shoulder (111), which is used to limit the bearing to the upper limit position of the pressure head body (102).
7. The automatic press-fit press head assembly of claim 1, wherein, The pressure head body (102) is also provided with a second limiting shoulder (112), which is used to limit the lower limit of the downward movement of the pressure head sleeve (103).
8. The automatic press-fit press head assembly of claim 1, wherein, It also includes a fault-prevention block (113), which is disposed on the connector (101).
9. A bearing automatic press fitting apparatus comprising a worktable (200), characterized in that, The workbench (200) is provided with a cover plate fixture (300) and also includes an automatic pressing head assembly (100) as described in any one of claims 1 to 8, wherein the automatic pressing head assembly (100) is located above the cover plate fixture (300) or can be moved to the top of the cover plate fixture (300).