Bearing bush press fitting tool
By designing the bearing and shell press-fit fixture, the combination of limiting slots, slots and press-fit guide holes is used to solve the problems of low assembly efficiency and difficult operation of semicircular bearing and shell seats, and an efficient and stable bearing and shell assembly process is achieved.
Patent Information
- Application Number
- CN202420671354.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-02
- Publication Date
- 2025-03-14
- Estimated Expiration
- 2034-04-02
AI Technical Summary
In the prior art, the assembly of semicircular bearing shells and bearing holders mainly relies on manual operations, resulting in low assembly efficiency and difficult operation. Unskilled operators are prone to damage parts and affecting product progress.
A bearing and shell press-fit fixture is designed, including upper clamping and lower clamping, respectively, the bearing and shell limit slots and bearing and shell seat slots are respectively set, and the bearing and shell press-fitting shaft is used to press the bearing and shell seats through the press-fitting guide hole.
Through the use of bearing and shell press-fit fixtures, the bearing and shell assembly efficiency and stability are significantly improved, assembly difficulty is reduced, professional requirements are reduced for operators, and the risk of parts damage is reduced.
Smart Images
Figure CN222609469U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of mechanical assembly fixtures, is mainly used for assembling a semicircular bearing bush and a bearing bush seat, and specifically is a bearing bush press-fitting fixture. Background Art
[0002] At present, the application scope of internal curve radial piston motor is getting wider and wider, and many projects have put forward requirements for the localization of motors. Among them, the plunger is a key component, which includes semi-circular bearings, bearing seats, rollers and other parts. Due to the small size of the bearing seat, many semi-circular bearings and bearing seats are assembled manually, and the semi-circular bearings are knocked in from the side of the bearing seat. The disadvantage of this method is that it requires too high personal quality of the assembly operator. Unskilled operators often scratch the bearings during assembly, resulting in scrapped parts. At the same time, the efficiency is low, which affects the product progress. Utility Model Content
[0003] The utility model provides a bearing bush press-fitting fixture, which is used for improving the assembly efficiency of the bearing bush installed on the bearing bush seat, reducing the assembly difficulty and reducing the influence of assemblers on the assembly quality.
[0004] The technical solution of the utility model is:
[0005] The utility model provides a bearing bush press-fitting fixture, which comprises: an upper clamping body and a lower clamping body connected to each other;
[0006] The upper clamp body is provided with a bearing bush limiting groove for placing the bearing bush;
[0007] The lower clamp body is provided with a bearing bush seat slot for placing the bearing bush seat, and the bearing bush limiting groove and the bearing bush seat slot are arranged opposite to each other;
[0008] The upper clamp body is also provided with a press-fitting guide hole connected to the bearing limiting groove, and the press-fitting guide hole is used for allowing a press-fitting shaft to be slidably inserted to press the bearing in the bearing limiting groove into the bearing seat in the bearing seat slot.
[0009] Preferably, the bearing bush limiting groove is an arc-shaped groove formed in the upper clamp body, and the bearing bush limiting groove is provided with openings on both the first surface and the second surface of the upper clamp body;
[0010] The opening of the bearing limiting groove on the first surface of the upper clamp body is used for placing the bearing, and the opening of the bearing limiting groove on the second surface of the upper clamp body is used for pressing the bearing into the bearing seat in the bearing seat slot.
[0011] Preferably, the opening of the bearing bush limiting groove on the first surface of the upper clamp body is arranged higher than the center of the bearing bush limiting groove.
[0012] Preferably, the openings of the bearing limiting groove on the first surface and the second surface of the upper clamp body are both designed with rounded corners.
[0013] Preferably, the upper clamp body and the lower clamp body are positioned by pins.
[0014] Preferably, the upper clamp body and the lower clamp body are fixed by screws.
[0015] Preferably, the bearing seat slot is provided with openings on both the third surface and the fourth surface of the lower clamp body;
[0016] The opening of the bearing bush seat slot on the third surface of the lower clamp body is used for receiving the bearing bush seat;
[0017] The opening of the bearing pad seat slot on the fourth surface of the lower clamp body is used for the bearing pad to be pressed into the bearing pad seat in the bearing pad seat slot.
[0018] Preferably, the fitting clearance between the bearing seat slot and the bearing seat is between 0.04 mm and 0.09 mm, and the fitting surface roughness between the bearing seat slot and the bearing seat is 0.8 or above.
[0019] Preferably, when the press-fitting shaft is inserted into the press-fitting guide hole, the fitting clearance between the press-fitting guide hole and the press-fitting shaft is between 0.03 mm and 0.06 mm.
[0020] The beneficial effects of the utility model are:
[0021] The bearing is placed into the bearing limit groove and the bearing seat is placed into the bearing seat slot manually or by a robot, and then the press-fitting shaft is inserted into the press-fitting guide hole manually or by a robot, and then the press-fitting shaft is slowly pressed by a press machine, and the press-fitting shaft moves downward after being subjected to force, further pushing the bearing downward, and finally assembled into the bearing seat. Since there is no need to manually assemble the bearing on the bearing seat, the bearing assembly efficiency and assembly stability can be improved. BRIEF DESCRIPTION OF THE DRAWINGS
[0022] Figure 1 is a schematic diagram of a bearing bush press-fitting fixture in an embodiment;
[0023] Figure 2 A schematic diagram of the bearing bush and the bearing bush seat in the embodiment being installed in the bearing bush press-fitting fixture;
[0024] Figure 3 It is a schematic diagram of the upper clamp in the embodiment;
[0025] Figure 4 A side view of the bearing bush press-fitting fixture in the embodiment;
[0026] Figure 5 is a bottom view of the bearing bush press-fitting fixture in the embodiment;
[0027] Description of the drawings: 1-upper clamping body; 2-lower clamping body; 3-press-fitting shaft; 4-diamond pin; 5-locating pin; 6-screw; 11-bearing limiting groove; 12-press-fitting guide hole; 21-bearing seat slot; 7-bearing; 8-bearing seat. DETAILED DESCRIPTION
[0028] In order to make the purpose, technical solution and advantages of the utility model clearer, the utility model is further described in detail below in combination with specific implementation methods and with reference to the accompanying drawings. It should be understood that these descriptions are only exemplary and are not intended to limit the scope of the utility model. In addition, in the following description, the description of well-known structures and technologies is omitted to avoid unnecessary confusion of the concept of the utility model.
[0029] Reference Figures 1 to 3 The present embodiment provides a bearing shell 7 press-fitting fixture, which includes: an upper clamping body 1 and a lower clamping body 2 which are connected to each other; a bearing shell limiting groove 11 for placing the bearing shell 7 is provided on the upper clamping body 1; a bearing shell seat slot 21 for placing the bearing shell seat 8 is provided on the lower clamping body 2, and the bearing shell limiting groove 11 and the bearing shell seat slot 21 are arranged opposite to each other; a press-fitting guide hole 12 which is connected to the bearing shell limiting groove 11 is also provided on the upper clamping body 1, and the press-fitting guide hole 12 is used for the press-fitting shaft 3 to be slidably inserted so as to press the bearing shell 7 in the bearing shell limiting groove 11 into the bearing shell seat 8 in the bearing shell seat slot 21.
[0030] The bearing 7 is placed into the bearing limit groove 11 and the bearing seat 8 is placed into the bearing seat slot 21 manually or by a robot, and then the press-fitting shaft 3 is inserted into the press-fitting guide hole 12 manually or by a robot, and then the press-fitting shaft 3 is slowly pressed by a press machine, and the press-fitting shaft 3 moves downward after being subjected to force, further pushing the bearing 7 to move downward, and finally assembled into the bearing seat 8. Since there is no need to manually assemble the bearing 7 on the bearing seat 8, the assembly efficiency and assembly stability of the bearing 7 can be improved.
[0031] Reference Figure 1 The bearing limiting groove 11 is an arc-shaped groove formed in the upper clamp body 1 (the arc-shaped groove in this embodiment is specifically a large semicircular groove whose arc length is larger than the arc length of the bearing 7), and the bearing limiting groove 11 is provided with openings on the first surface and the second surface of the upper clamp body 1; the opening of the bearing limiting groove 11 on the first surface of the upper clamp body 1 is used for allowing the bearing 7 to be placed therein, and the opening of the bearing limiting groove 11 on the second surface of the upper clamp body 1 is used for allowing the bearing 7 to be pressed into the bearing seat 8 in the bearing seat slot 21.
[0032] In this embodiment, the second surface of the upper clamp body 1 refers to the surface facing the lower clamp body 2, and the first surface of the upper clamp body 1 refers to the surface connected to the second surface. Figure 2 From the perspective of the second surface of the upper clamp body 1, the first surface of the upper clamp body 1 is a curved surface. The bearing bush limiting groove 11 and the press-fitting guide hole 12 have the same inner diameter. The press-fitting guide hole 12 is a cylindrical hole, while the bearing bush limiting groove 11 is a special-shaped groove. The bearing bush limiting groove 11 can be formed by cutting upward from the second surface of the upper clamp body 1 to a length equal to the height of the bearing bush 7.
[0033] Combination Figure 1 From the perspective of the embodiment, the opening of the bearing stop groove 11 on the first surface of the upper clamp body 1 is higher than the center of the bearing stop groove 11. Specifically, the opening of the bearing stop groove 11 on the first surface of the upper clamp body 1 is 2 mm higher than the center of the bearing stop groove 11, so that the bearing 7 is completely installed in the bearing stop groove 11 and the bearing 7 is prevented from popping out.
[0034] For the lower clamp body 2, the bearing bush seat slot 21 is provided with openings on both the third surface and the fourth surface of the lower clamp body 2; the opening of the bearing bush seat slot 21 on the third surface of the lower clamp body 2 is used for inserting the bearing bush seat 8; the opening of the bearing bush seat slot 21 on the fourth surface of the lower clamp body 2 is used for pressing the bearing bush 7 into the bearing bush seat 8 in the bearing bush seat slot 21. The fourth surface of the lower clamp body 2 is the surface facing the upper clamp body 1, and the third surface of the lower clamp body 2 is the side surface adjacent to the fourth surface.
[0035] In this embodiment, the openings of the bearing bush limiting groove 11 on the first surface and the second surface of the upper clamp body 1 are both rounded. The rounding radius R is between 0.5 mm and 1 mm, and the chamfer and the arc surface are smoothly transitioned to prevent the bearing bush 7 from being scratched during installation.
[0036] like Figure 4 and Figure 5 In this embodiment, the upper clamp body 1 and the lower clamp body 2 are connected by two pins (specifically Figure 4 The bearing bush limit groove 11 is positioned by means of the diamond pin 4 and the positioning pin 5), and the screws are tightened. After installation, the bearing bush seat slot 21 is used as a reference to detect that the symmetry of the bearing bush limit groove 11 is within 0.05 mm.
[0037] In order to ensure reliable positioning and facilitate loading and unloading, it is necessary to control the positioning surface size and surface roughness of the bearing seat slot 21 and the bearing seat 8 to ensure that the fitting clearance between the bearing seat slot 21 and the bearing seat 8 is between 0.04mm-0.09mm, and the fitting surface between the bearing seat slot 21 and the bearing seat 8 needs to be finely milled or ground to a surface roughness of 0.8 or above.
[0038] In order to realize the sliding of the press-fitting shaft 3 in the press-fitting guide hole 12 , when the press-fitting shaft 3 is inserted into the press-fitting guide hole 12 , the fitting clearance between the press-fitting guide hole 12 and the press-fitting shaft 3 is maintained between 0.03 mm and 0.06 mm.
[0039] Using the above-mentioned bearing bush 7 press-fitting fixture, when assembling and using it, follow the following process:
[0040] 1. According to the dimensions of the bearing bush 7 and the bearing bush seat 8, determine the dimensions of the bearing bush limiting groove 11 of the upper clamp body 1 and the dimensions of the bearing bush seat slot 21 formed by the upper and lower clamp bodies 2;
[0041] 2. Install the positioning pin and diamond pin on the lower clamp body 2, and install the upper clamp body 1 and the lower clamp body 2 by positioning with two pins on one side, and then fix them with screws;
[0042] 3. Install the bearing bush 7 in the bearing bush limiting groove 11 of the upper clamp body 1, and then install the bearing bush seat 8 into the bearing bush seat slot 21. After the bearing bush 7 and the bearing bush seat 8 are installed, install the press-fitting shaft 3 into the press-fitting guide hole 12 of the upper clamp body 1, and slowly press the press-fitting shaft 3 by a press to complete the assembly;
[0043] 4. After press-fitting, take out the clamping shaft and bearing seat 8 in turn and proceed to the next assembly.
[0044] The above-mentioned bearing bush 7 press-fitting tool has the following effects:
[0045] (1) Easy to use and stable assembly. The original manual assembly scheme was greatly affected by the operator's proficiency. Unfamiliar operators often caused the bearing 7 to be scratched and scrapped during assembly. After adopting this scheme, new employees can operate stably after one explanation.
[0046] (2) High efficiency and stable assembly cycle. Using this solution, the assembly cycle of a single product can be controlled within 1 minute. If assembly is done in an assembly line, the cycle can be shortened to less than 40 seconds.
[0047] It should be noted that the various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.
[0048] Although the preferred embodiments of the utility model embodiments have been described, those skilled in the art may make additional changes and modifications to these embodiments once they have learned the basic creative concept. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications that fall within the scope of the utility model embodiments.
[0049] It should also be noted that, in this article, the orientation or position relationship indicated by the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside", etc. is based on the orientation or position relationship shown in the drawings, which is for the convenience of describing the utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the utility model. In addition, relational terms such as "first" and "second" are used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply that there is any such actual relationship or order between these entities or operations, nor can they be understood as indicating or implying relative importance. Moreover, the terms "include", "comprise" or any other variant thereof are intended to cover non-exclusive inclusion, so that the process, method, article or terminal device including a series of elements does not include those elements, but also includes other elements that are not explicitly listed, or also includes elements inherent to such process, method, article or terminal device. In the absence of more restrictions, the elements defined by the sentence "including one..." do not exclude the existence of other identical elements in the process, method, article or terminal device including the elements.
[0050] The technical solution provided by the utility model is described in detail above. The principle and implementation method of the utility model are described in this article using specific examples. The description of the above embodiments is only used to help understand the utility model, and the content of this specification should not be understood as limiting the utility model. At the same time, for those skilled in the art, according to the utility model, there will be different forms of changes in the specific implementation methods and application scopes. It is not necessary and impossible to list all the implementation methods here, and the obvious changes or modifications derived from them are still within the protection scope of the utility model.
Claims
1. A bearing shell press-fitting tool, characterized in that: The bearing shell press-fitting tool comprises: an upper clamping body and a lower clamping body connected to each other; The upper clamp body is provided with a bearing bush limiting groove for placing the bearing bush; The lower clamp body is provided with a bearing bush seat slot for placing the bearing bush seat, and the bearing bush limiting groove and the bearing bush seat slot are arranged opposite to each other; The upper clamp body is also provided with a press-fitting guide hole connected to the bearing limiting groove, and the press-fitting guide hole is used for allowing a press-fitting shaft to be slidably inserted to press the bearing in the bearing limiting groove into the bearing seat in the bearing seat slot.
2. The bearing shell press-fitting tool according to claim 1, characterized in that: The bearing bush limiting groove is an arc-shaped groove formed in the upper clamp body, and the bearing bush limiting groove is provided with openings on the first surface and the second surface of the upper clamp body; The opening of the bearing limiting groove on the first surface of the upper clamp body is used for placing the bearing, and the opening of the bearing limiting groove on the second surface of the upper clamp body is used for pressing the bearing into the bearing seat in the bearing seat slot.
3. The bearing shell press-fitting tool according to claim 2, characterized in that: The opening of the bearing bush limiting groove on the first surface of the upper clamp body is arranged higher than the center of the bearing bush limiting groove.
4. The bearing shell press-fitting tool according to claim 2, characterized in that: The openings of the bearing bush limiting groove on the first surface and the second surface of the upper clamp body are both designed with rounded corners.
5. The bearing press-fitting tool according to claim 1, characterized in that: The upper clamp body and the lower clamp body are positioned by pins.
6. The bearing shell press-fitting tool according to claim 1 or 5, characterized in that: The upper clamp body and the lower clamp body are fixed by screws.
7. The bearing press-fitting tool according to claim 1, characterized in that: The bearing seat slot is provided with openings on both the third surface and the fourth surface of the lower clamp body; The opening of the bearing bush seat slot on the third surface of the lower clamp body is used for receiving the bearing bush seat; The opening of the bearing pad seat slot on the fourth surface of the lower clamp body is used for the bearing pad to be pressed into the bearing pad seat in the bearing pad seat slot.
8. The bearing press-fitting tool according to claim 1, characterized in that: The matching clearance between the bearing seat slot and the bearing seat is between 0.04mm and 0.09mm, and the matching surface roughness between the bearing seat slot and the bearing seat is 0.8 or above.
9. The bearing press-fitting tool according to claim 1, characterized in that: When the press-fitting shaft is inserted into the press-fitting guide hole, the fitting clearance between the press-fitting guide hole and the press-fitting shaft is between 0.03 mm and 0.06 mm.