Pump cover bearing press fitting tool

Abstract

The utility model belongs to the technical field of pump assembly equipment relates to a pump cover bearing press -fitting frock, include: lower bottom die, the axial center place of lower bottom die is integrative with the centring axle that extends upwards, and the upper surface of lower bottom die is provided with the multistage package formula concave -convex structure that is compatible with the shape of pump cover bottom, upper die, upper die is driven to move downward by power device to press -fit bearing, the center hole of upper die is sleeved on the centring axle and is oriented and positioned by it, and the bottom of upper die is provided with the press -fitting plane that is compatible with the end face of bearing, and the outer edge bottom is provided with the press -fitting datum plane that is compatible with the upper surface of pump cover outer edge, when press -fitting, the workpiece to be press -fitting is fed in the way that bearing seat opening is upward, and the pump cover is placed in the lower bottom die and is positioned by the multistage package formula concave -convex structure, and the bearing is sleeved on the centring axle and is positioned by it, and the upper die downlink completes press -fitting. The pump cover bearing press -fitting frock provided by the utility model has the advantages of accurate centring, not easy to deform, high assembly precision.

Description

Technical Field

[0001] This utility model belongs to the technical field of pump assembly equipment, and relates to a pump cover bearing press-fitting fixture. Background Technology

[0002] In the field of pump assembly technology, the assembly of pump cover bearings is a crucial step, as its assembly quality directly affects the overall performance and operational stability of the pump. In traditional assembly operations, bearing assembly often relies on manual operation, which is not only inefficient but also lacks precision. With the rapid development of industrial automation and intelligent manufacturing, fully automated assembly equipment has become a trend. Compared to manual assembly, automated assembly offers higher efficiency, better precision, and consistency; however, such equipment is very expensive.

[0003] Considering both assembly efficiency and cost, semi-automatic assisted assembly using press fitting machines has become an ideal choice for small and medium-sized enterprises. However, pump covers are typical thin-walled parts, which present challenges in centering during assembly, are prone to deformation, and pose a risk of bearing damage during the assembly process. Therefore, the tooling design of the press fitting machine becomes crucial in the design of press fitting equipment. It must be able to achieve precise and stable positioning of the pump cover, ensure coaxiality during high-pressure assembly, and protect the workpiece from deformation. Utility Model Content

[0004] This utility model addresses the shortcomings of existing technologies by providing a pump cover bearing press-fitting fixture, which has the advantages of low cost, accurate centering, resistance to deformation, and high assembly precision.

[0005] To solve the above-mentioned technical problems, the objective of this utility model is achieved through the following technical solution: A pump cover bearing press-fitting fixture, comprising: The lower mold has an integrally formed centering shaft extending upward at its axial center, and the upper surface of the lower mold is provided with a multi-level wrapping concave-convex structure that matches the shape of the bottom of the pump cover. The upper die is driven by a power device to move downward to press the bearing. The center hole of the upper die is fitted into a centering shaft and guided and positioned by it. The bottom of the upper die is provided with a pressing plane that matches the end face of the bearing, and the bottom of its outer edge is provided with a pressing reference surface that matches the upper surface of the outer edge of the pump cover. During press fitting, the workpiece to be press-fitted is fed with the bearing seat opening facing upwards. The pump cover is placed on the lower mold and positioned by a multi-level enveloping concave-convex structure. The bearing is fitted onto the centering shaft and positioned by it. The upper press mold moves downwards to complete the press fitting.

[0006] In the aforementioned pump cover bearing press-fitting fixture, the multi-stage enclosed concave-convex structure includes: a positioning convex ring inserted into the bottom groove of the pump cover bearing seat, a positioning boss in contact with the bottom of the pump cover, and a positioning ring groove in contact with the bottom of the outer edge of the pump cover.

[0007] In the aforementioned pump cover bearing press-fitting fixture, a radial notch is provided on the outer edge of the lower mold, which exposes the bottom of the pump cover; the radial notch is designed to accommodate fingers or tools for operation.

[0008] In the aforementioned pump cover bearing press-fitting fixture, a pair of radial notches are provided and are symmetrically distributed relative to the axis.

[0009] In the above-mentioned pump cover bearing press-fitting fixture, the upper press mold includes a central column, an inner press mold ring, and an outer press mold ring distributed from the inside to the outside. The end face of the central column is correspondingly arranged with the power device. The press-fitting plane is arranged in the inner press mold ring, and the press-fitting reference surface is arranged in the outer press mold ring.

[0010] In the aforementioned pump cover bearing press-fitting fixture, a plurality of circumferentially spaced fan-shaped connecting parts are provided between the inner ring and outer ring of the press mold; furthermore, the central column, the inner ring, the outer ring, and the fan-shaped connecting parts are integrally formed.

[0011] In the above-mentioned pump cover bearing press-fitting fixture, a press-fitting convex ring is provided at the bottom of the inner ring of the press mold, and the press-fitting convex ring and the press-fitting plane constitute the cover structure of the bearing.

[0012] In the aforementioned pump cover bearing press-fitting fixture, the power unit is a cylinder or a hydraulic cylinder, which is mounted on a workbench via a frame, with its piston rod pointing vertically downward and connected to a press-fitting plate that mates with the upper die.

[0013] Compared with the prior art, this utility model has the following advantages: This invention provides a pump cover bearing press-fit fixture. By setting a multi-level wrapping concave-convex structure on the lower mold, the pump cover can be limited from multiple directions and levels, achieving precise positioning and effectively preventing offset and rotation during the press-fit process, ensuring assembly accuracy, and effectively preventing workpiece deformation. This invention uses an integrally molded centering shaft, which simultaneously positions the bearing and guides the upper mold, simplifying the structure, reducing costs, and ensuring extremely high coaxiality during the press-fit process. Through the above press-fit fixture, this invention achieves fast, accurate, and high-quality press-fit operations, significantly improving product qualification rate and production efficiency. Attached Figure Description

[0014] Figure 1 This is a perspective view of the present invention; Figure 2 yes Figure 1 Axial sectional view; Figure 3 This is an exploded view of this utility model; Figure 4 This is a perspective view of the bottom mold of this utility model; Figure 5 This is a perspective view of the upper pressing mold of this utility model; Reference numerals: 1. Lower mold; 11. Centering shaft; 12. Positioning convex ring; 13. Positioning boss; 14. Positioning ring groove; 15. Radial notch; 2. Upper mold; 21. Center hole; 22. Pressing plane; 23. Pressing reference surface; 24. Center column; 25. Inner ring of mold; 26. Outer ring of mold; 27. Sector-shaped connecting part; 28. Pressing convex ring; 31. Pump cover; 32. Bearing; 33. Bearing seat; 34. Bottom groove. Detailed Implementation

[0015] The present invention will be further described below with reference to the accompanying drawings and specific embodiments. See also: Figure 1-5 : A pump cover bearing press-fitting fixture, comprising: The lower mold 1 has an integrally formed centering shaft 11 extending upward at its axial center. The upper surface of the lower mold 1 is provided with a multi-level wrapping concave-convex structure that is adapted to the shape of the bottom of the pump cover 31. Further, the multi-level wrapping concave-convex structure includes: a positioning protrusion 12 inserted into the bottom groove 34 of the bearing seat 33 of the pump cover 31, a positioning boss 13 in contact with the bottom of the pump cover 31, and a positioning ring groove 14 in contact with the bottom of the outer edge of the pump cover 31. The upper mold 2 is driven by a power device to move downward to press the bearing 32. The center hole 21 of the upper mold 2 is fitted onto the centering shaft 11 and guided and positioned by it. The bottom of the upper mold 2 is provided with a pressing plane 22 that is adapted to the end face of the bearing 32, and the bottom of its outer edge is provided with a pressing reference surface 23 that is compatible with the upper surface of the outer edge of the pump cover 31. During press fitting, the workpiece to be pressed is fed with the bearing seat 33 opening upwards, the pump cover 31 is placed on the lower mold 1 and positioned by a multi-level enveloping concave-convex structure, the bearing 32 is fitted onto the centering shaft 11 and positioned by it, and the upper press mold 2 moves downwards to complete the press fitting.

[0016] The working process of this embodiment is as follows: First, the pump cover 31 is placed on the lower mold 1 with its bearing seat 33 opening facing upwards. At this time, the positioning protrusion 12 of the lower mold 1 is inserted into the corresponding groove at the bottom of the bearing seat 33 of the pump cover 31, the positioning boss 13 supports the bottom of the pump cover 31, and the outer edge of the pump cover 31 is embedded in the positioning ring groove 14, thereby achieving precise positioning. Next, the bearing 32 to be pressed is fitted onto the centering shaft 11 of the lower mold 1, and the bearing 32 moves downward along the centering shaft 11 and partially enters the bearing seat 33. Then, the upper mold 2 is fitted onto the centering shaft 11 of the lower mold 1, and the upper mold 2 moves downward along the centering shaft 11 until the pressing plane 22 is in contact with the upper end face of the bearing 32. Finally, the power unit is started, driving the upper mold 2 to move downward. The pressing plane 22 of the upper mold 2 applies pressure, pressing the bearing 32 into the bearing seat 33 of the pump cover 31, until the pressing reference surface 23 of the upper mold 2 is in contact with the upper surface of the outer edge of the pump cover 31. At this time, the height difference between the upper end face of the bearing 32 and the upper surface of the outer edge of the pump cover 31 is equal to the height difference between the pressing plane 22 and the pressing reference surface 23. This height difference is the set pressing depth, and the bearing 32 is pressed into place.

[0017] The lower mold 1 has a radial notch 15 along its outer edge, which exposes the bottom of the pump cover 31. The radial notch 15 is designed to accommodate fingers or tools for operation. During material feeding, the bottom of the pump cover 31 can be supported by fingers or tools, and then the pump cover 31 can be lifted upwards to separate it from the lower mold 1. Preferably, there is a pair of radial notches 15, which are symmetrically distributed with respect to the axis.

[0018] In this embodiment, the upper mold 2 includes a central column 24, an inner mold ring 25, and an outer mold ring 26. The end face of the central column 24 is correspondingly arranged with the power device. The pressing plane 22 is arranged in the inner mold ring 25, and the pressing reference surface 23 is arranged in the outer mold ring 26. Furthermore, a plurality of circumferentially spaced fan-shaped connecting portions 27 are provided between the inner mold ring 25 and the outer mold ring 26. Furthermore, the central column 24, the inner mold ring 25, the outer mold ring 26, and the fan-shaped connecting portions 27 are integrally formed. This structure allows for precise machining of the pressing plane 22 and the pressing reference surface 23, while simultaneously achieving a lightweight upper mold 2.

[0019] The bottom of the inner ring 25 of the aforementioned mold is provided with a mold protrusion 28, which, together with the pressing surface 22, constitutes the cover structure of the bearing 32. During pressing, the cover structure encloses the bearing 32, which can better limit and protect the bearing 32, preventing it from shifting or being damaged.

[0020] The pressing fixture of this embodiment can be adapted to a general pressing machine. Specifically, the power device is a cylinder or a hydraulic cylinder. The cylinder or hydraulic cylinder is mounted on the workbench by a frame, and its piston rod is vertically downward and connected to a pressing plate that cooperates with the upper pressing mold 2.

[0021] The above embodiments are merely preferred embodiments of the present utility model and are not intended to limit the scope of protection of the present utility model. Therefore, all equivalent changes made to the structure, shape, and principle of the present utility model should be covered within the scope of protection of the present utility model.

Claims

1. A pump cover bearing press-fitting fixture, characterized in that, include: The lower bottom mold (1) has an integrally formed centering shaft (11) extending upward at its axial center, and the upper surface of the lower bottom mold (1) is provided with a multi-level wrapping concave-convex structure that matches the shape of the bottom of the pump cover (31). The upper mold (2) is driven by a power device to move downward to press the bearing (32). The center hole (21) of the upper mold (2) is fitted onto the centering shaft (11) and guided and positioned by it. The bottom of the upper mold (2) is provided with a pressing plane (22) that matches the end face of the bearing (32), and the bottom of its outer edge is provided with a pressing reference surface (23) that matches the upper surface of the outer edge of the pump cover (31). During press fitting, the workpiece to be pressed is fed with the bearing seat (33) opening upwards, the pump cover (31) is placed on the lower mold (1) and positioned by a multi-level enclosed concave-convex structure, the bearing (32) is fitted onto the centering shaft (11) and positioned by it, and the upper press mold (2) moves downwards to complete the press fitting.

2. The pump cover bearing press-fitting fixture according to claim 1, characterized in that, The multi-level enclosed concave-convex structure includes: a positioning protrusion (12) inserted into the bottom groove (34) of the bearing seat (33) of the pump cover (31), a positioning boss (13) in contact with the bottom of the pump cover (31), and a positioning ring groove (14) in contact with the bottom of the outer edge of the pump cover (31).

3. The pump cover bearing press-fitting fixture according to claim 1, characterized in that, The lower mold (1) has a radial notch (15) on its outer edge, which exposes the bottom of the pump cover (31).

4. The pump cover bearing press-fitting fixture according to claim 3, characterized in that, The radial notches (15) are provided in pairs and are symmetrically distributed with respect to the axis.

5. The pump cover bearing press-fitting fixture according to claim 1, characterized in that, The upper mold (2) includes a central column (24), an inner ring (25) of the mold and an outer ring (26) of the mold. The end face of the central column (24) is correspondingly set with the power device. The pressing plane (22) is set in the inner ring (25) of the mold and the pressing reference plane (23) is set in the outer ring (26) of the mold.

6. The pump cover bearing press-fitting fixture according to claim 5, characterized in that, A number of circumferentially spaced fan-shaped connecting parts (27) are provided between the inner ring (25) and the outer ring (26) of the mold.

7. The pump cover bearing press-fitting fixture according to claim 5, characterized in that, The bottom of the inner ring (25) of the die is provided with a die protrusion (28), and the die protrusion (28) and the die pressing plane (22) constitute the cover structure of the bearing (32).

Images