Press fitting tool for bearing and pump shaft of power-assisted steering oil pump

Abstract

The utility model discloses a press fitting tool for a bearing and a pump shaft of a power-assisted steering oil pump. The positioning core is used for supporting a bearing, the positioning seat is used for being installed on a pump body and guiding a pump shaft, the first positioning mechanism is used for positioning the pump body, the second positioning mechanism is arranged on the positioning core and used for positioning the bearing, and the pump shaft is located above the second positioning mechanism. According to the press fitting tool for the bearing and the pump shaft of the power-assisted steering oil pump, the bearing and the pump shaft can be pressed into the pump body at a time, the assembly efficiency is improved, and the product manufacturing cost is reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of vehicle steering systems. Specifically, the utility model relates to a press-fitting tooling for a bearing of a steering assist oil pump and a pump shaft. Background Art

[0002] When assembling the bearing and the pump shaft of the steering assist oil pump, the adopted assembly method is as follows: The operator works in two stations. First, the pump shaft is pre-pressed into the bearing, and then in the next station, the pump shaft and the bearing are pressed into the pump body together. On the one hand, this assembly method is time-consuming and laborious, and the assembly efficiency is low; on the other hand, some pump shafts with circular keyways may scratch the oil seal during the process of being pressed into the bearing hole, resulting in leakage, leading to secondary rework and increasing production costs.

[0003] Chinese Patent with application number 202223231319.4 discloses an assembly tooling for a pump cover and a pump shaft, which is used to assemble the pump shaft of a centrifugal pump on the pump shaft. It includes a disc for placing the pump cover, a support tube extending downward from the center of the disc, the support tube is installed on the base, a pressure head is provided above the disc, the pressure head is in the shape of a circular plate, the top surface of the pressure head is connected to the hydraulic press, the inner circle of the support tube is matched with the small-diameter rod at the lower end of the pump shaft, and a spring sleeve is movably connected to the bottom surface of the pressure head, and a spring is installed in the spring sleeve.

[0004] It is desired to provide an improved press-fitting tooling for a bearing of a steering assist oil pump and a pump shaft, especially regarding how to improve the assembly efficiency. Summary of the Utility Model

[0005] The utility model aims to solve at least one of the technical problems existing in the prior art. For this purpose, the utility model provides a press-fitting tooling for a bearing of a steering assist oil pump and a pump shaft, and the purpose is to improve the assembly efficiency.

[0006] To achieve the above purpose, the technical solution adopted by the utility model is: A press-fitting tooling for a bearing of a steering assist oil pump and a pump shaft includes a positioning core for supporting the bearing, a positioning seat for being installed on the pump body and guiding the pump shaft, a first positioning mechanism for positioning the pump body, and a second positioning mechanism arranged on the positioning core and for positioning the bearing. The pump shaft is located above the second positioning mechanism.

[0007] A limiting sleeve for applying pressure to the pump shaft is arranged above the positioning seat.

[0008] The first positioning mechanism includes a first positioning rod, a second positioning rod movable relative to the first positioning rod, and a first spring arranged between the first positioning rod and the second positioning rod.

[0009] The lower end of the second positioning rod is inserted into the interior of the first positioning rod, and the upper end of the second positioning rod is inserted into the positioning hole on the pump body.

[0010] A plurality of the first positioning mechanisms are provided.

[0011] The second positioning mechanism includes a positioning sleeve movably arranged and a second spring applying an elastic acting force to the positioning sleeve, and a guiding hole allowing the positioning sleeve to pass through is arranged on the positioning core.

[0012] The first positioning mechanism and the positioning core are arranged on a bottom plate.

[0013] The bearing and pump shaft press-fitting tooling for the power steering oil pump of the present utility model can press the bearing and the pump shaft into the pump body at one time, improving the assembly efficiency and reducing the product manufacturing cost. Description of the Drawings

[0014] This specification includes the following drawings, and the shown contents are respectively:

[0015] Figure 1 is an exploded view of the bearing and pump shaft press-fitting tooling for the power steering oil pump of the present utility model;

[0016] Figure 2 is an axonometric view of the bearing and pump shaft press-fitting tooling for the power steering oil pump of the present utility model;

[0017] Figure 3 is a front view of the bearing and pump shaft press-fitting tooling for the power steering oil pump of the present utility model;

[0018] Figure 4 is an assembly schematic diagram of the bearing and pump shaft press-fitting tooling for the power steering oil pump of the present utility model;

[0019] Figure 5 is an assembly schematic sectional view of the bearing and pump shaft press-fitting tooling for the power steering oil pump of the present utility model;

[0020] The markings in the figures are: 1. Limit sleeve; 2. Positioning seat; 3. Second positioning rod; 4. First spring; 5. Positioning core; 6. Positioning sleeve; 7. First positioning rod; 8. Second spring; 9. Bottom plate; 10. First bolt; 11. Gasket; 12. Second bolt; 13. Pump shaft; 14. Pump body; 15. Bearing. Detailed Embodiments

[0021] The following is a further detailed description of the specific embodiments of the present utility model by describing the embodiments with reference to the drawings, aiming to help those skilled in the art have a more complete, accurate and in-depth understanding of the concept and technical solution of the present utility model and facilitate its implementation.

[0022] It should be noted that in the following embodiments, the "first" and "second" do not represent an absolute distinction relationship in structure and / or function, nor do they represent the execution order, but are only for the convenience of description.

[0023] As Figures 1 to 5 shown, the utility model provides a press-fitting tooling for a power steering oil pump bearing and a pump shaft, which includes a bottom plate 9, a positioning core 5 for supporting the bearing, a positioning seat 2 for being installed on the pump body and guiding the pump shaft, a first positioning mechanism for positioning the pump body, and a second positioning mechanism arranged on the positioning core 5 and for positioning the bearing. The pump shaft is located above the second positioning mechanism.

[0024] Specifically, as Figures 1 to 5 shown, the bottom plate 9 is horizontally arranged. The first positioning mechanism and the positioning core 5 are arranged on the bottom plate 9. A plurality of first positioning mechanisms are provided, and the first positioning mechanisms are distributed around the outer side of the positioning core 5. The positioning seat 2 is placed in the cavity at the top of the pump body. A limiting sleeve 1 for applying pressure to the pump shaft is arranged above the positioning seat 2. A through hole for the pump shaft to pass through is arranged at the center of the positioning seat 2. The pump shaft is in a vertical state. The bearing is located below the pump body, and the bearing is placed on the top surface of the positioning core 5. The positioning core 5 is fixedly installed on the top surface of the bottom plate 9 through a first bolt 10, and the first bolt 10 is an M8×20 hexagon socket head cap screw.

[0025] As Figures 1 to 5 shown, the first positioning mechanism includes a first positioning rod 7, a second positioning rod 3 movable relative to the first positioning rod 7, and a first spring 4 arranged between the first positioning rod 7 and the second positioning rod 3. The first positioning rod 7 is vertically installed on the bottom plate 9. The second positioning rod 3 is vertically arranged and the second positioning rod 3 is coaxial with the first positioning rod 7. The lower end of the second positioning rod 3 is inserted into the inside of the first positioning rod 7. The upper end of the second positioning rod 3 is inserted into the positioning hole on the pump body. The second positioning rod 3 provides a supporting effect on the pump body. The first spring 4 applies an elastic force to the second positioning rod 3 to make it move upward. The first spring 4 is a cylindrical helical spring and a compression spring. A second bolt 12 is arranged at the lower end of the second positioning rod 3. The second bolt 12 is located in the inner cavity of the first positioning rod 7. The second bolt 12 is an M8×15 hexagon socket head cap screw. The second bolt 12 is used to play a limiting role to prevent the second positioning rod 3 from separating from the first positioning rod 7 when moving upward.

[0026] As Figures 1 to 5 shown, in this embodiment, three first positioning mechanisms are provided. The three first positioning mechanisms jointly provide a supporting and positioning effect on the pump body, so that the pump body, the bearing and the pump shaft are kept in a coaxial state.

[0027] As Figures 1 to 5As shown in the figure, the second positioning mechanism includes a positioning sleeve 6 that is movably arranged and a second spring 8 that applies an elastic force to the positioning sleeve 6. A guide hole through which the positioning sleeve 6 passes is provided at the center of the top of the positioning core 5. The second spring 8 is located in the inner cavity of the positioning core 5. The second spring 8 applies an elastic force to the positioning sleeve 6 to move it upward. The second spring 8 is a cylindrical helical spring and a compression spring. After the positioning sleeve 6 passes upward through the guide hole, it is inserted into the central hole of the bearing to achieve the positioning of the bearing.

[0028] As Figure 4 and Figure 5 shown, the method for press-fitting the pump shaft and the bearing is as follows:

[0029] First, place the bearing on the positioning core 5 and fix its position by means of the positioning sleeve 6. Secondly, invert the pump body and fix it on the second positioning rod 3 through the mounting hole. Then, insert the pump shaft into the bearing hole of the pump body. Finally, install the positioning seat 2 and the limit sleeve 1 on the pump shaft. The limit sleeve 1 is located at the top of the pump shaft. Start the press. After the press contacts the limit sleeve 1, apply a downward pressure to the pump shaft. After the limit sleeve 1 contacts the positioning seat 2, push the positioning seat 2 and the pump body downward. Finally, press the bearing into the pump body and press the pump shaft into the central hole of the bearing, and this operation is completed.

[0030] The press-fitting tooling for the steering assist oil pump bearing and the pump shaft with the above structure can achieve the following beneficial effects:

[0031] 1: It reduces the number of workstations, thereby reducing the required clamping machinery and personnel configuration, and lowering the manufacturing cost;

[0032] 2: It standardizes the operation process and reduces uncontrollable incorrect operations caused by unfamiliar skills of operators;

[0033] 3: Relying on this inverted assembly method, the bearing and the pump shaft are pressed in together, avoiding the risk of the round keyway scratching the oil seal and causing leakage;

[0034] 4: Relying on the tooling operation greatly improves the assembly efficiency and working rhythm, thereby reducing the product manufacturing cost.

[0035] The above has made an exemplary description of the present invention in conjunction with the accompanying drawings. Obviously, the specific implementation of the present invention is not limited by the above methods. As long as various non-substantive improvements are made by adopting the method concept and technical solution of the present invention; or without improvement, the above concept and technical solution of the present invention are directly applied to other occasions, they are all within the protection scope of the present invention.

Claims

1. Steering assist oil pump bearing and pump shaft press-fitting tooling, characterized in that: It includes a positioning core for supporting the bearing, a positioning seat for being mounted on the pump body and guiding the pump shaft, a first positioning mechanism for positioning the pump body, and a second positioning mechanism arranged on the positioning core and for positioning the bearing. The pump shaft is located above the second positioning mechanism.

2. The press-fitting tooling for the power steering oil pump bearing and the pump shaft according to claim 1, wherein: A limit sleeve for applying pressure to the pump shaft is arranged above the positioning seat.

3. The press-fitting tooling for the steering assist oil pump bearing and pump shaft according to claim 1, characterized in that: The first positioning mechanism includes a first positioning rod, a second positioning rod movable relative to the first positioning rod, and a first spring arranged between the first positioning rod and the second positioning rod.

4. The press-fitting tooling for the power steering oil pump bearing and the pump shaft according to claim 3, characterized in that: The lower end of the second positioning rod is inserted into the interior of the first positioning rod, and the upper end of the second positioning rod is inserted into a positioning hole on the pump body.

5. The press-fitting tooling for the steering assist oil pump bearing and the pump shaft according to any one of claims 1 to 4, characterized in that: A plurality of the first positioning mechanisms are arranged.

6. The press-fitting tooling for the power steering oil pump bearing and the pump shaft according to any one of claims 1 to 4, characterized in that: The second positioning mechanism includes a movably arranged positioning sleeve and a second spring applying an elastic acting force to the positioning sleeve. A guiding hole for the positioning sleeve to pass through is arranged on the positioning core.

7. The press-fitting tooling for the steering assist oil pump bearing and the pump shaft according to any one of claims 1 to 4, characterized in that: The first positioning mechanism and the positioning core are arranged on a bottom plate.

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