Clamp for testing oil pump

Abstract

The utility model provides an engine oil pump test fixture, including fixture plate, support seat, transmission shaft and coupling, the fixture plate is equipped with the axle hole, the transmission shaft is installed in the axle hole of fixture plate through the bearing and is perpendicular to the right side face of fixture plate, the left end portion of transmission shaft is used for driving the engine oil pump to be tested, and the right end portion of transmission shaft is used for driving the engine oil pump to be tested. One end of the coupler is fixedly connected with the right end of the transmission shaft, the other end of the coupler is used for being connected with a motor shaft, the left end of the supporting base is fixed to the right side face of the clamp plate through a bolt, the right end of the supporting base is installed on the rack through a limiting structure, and the right side face of the clamp plate is parallel to the outer side face of the rack. The utility model can ensure the coaxiality of the transmission shaft and the motor shaft, thereby improving the installation precision of the transmission shaft and the center of the oil pump rotor.

Description

Technical Field

[0001] This utility model belongs to the field of machinery, specifically relating to a fixture for testing an oil pump. Background Technology

[0002] Oil pump products typically require testing before leaving the factory, necessitating specialized fixtures. In existing technology, the fixture's drive shaft is connected to the motor shaft via a key. This makes it difficult to guarantee the coaxiality of the drive shaft and motor shaft, and installation deviations are prone to occur when mounting the fixture plate onto the test bench. These accumulated installation errors can severely affect the alignment of the drive shaft with the oil pump rotor center, thus impacting the test results. Utility Model Content

[0003] The technical problem to be solved by this utility model is to provide a fixture for testing an oil pump, which can improve the installation accuracy of the drive shaft and the center of the oil pump rotor.

[0004] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: a fixture for testing an oil pump, comprising a fixture plate, a support base, a drive shaft, and a coupling. The fixture plate is provided with a shaft hole. The drive shaft is installed in the shaft hole of the fixture plate through a bearing and is perpendicular to the right side of the fixture plate. The left end of the drive shaft is used to drive the oil pump to be tested. One end of the coupling is fixedly connected to the right end of the drive shaft, and the other end of the coupling is used to connect to a motor shaft. The left end of the support base is fixed to the right side of the fixture plate by bolts. The right end of the support base is installed on the test bench through a limiting structure, so that the right side of the fixture plate is parallel to the outer side of the test bench.

[0005] In the above technical solution, since the drive shaft is perpendicular to the right side of the fixture plate, and the right side of the fixture plate is parallel to the outer side of the frame through the support seat, it means that the drive shaft and the coupling installed on the drive shaft are perpendicular to the outer side of the frame. This ensures the coaxiality of the drive shaft and the motor shaft, thereby improving the installation accuracy of the drive shaft and the center of the oil pump rotor.

[0006] Furthermore, the right end of the support base is provided with a positioning stop and a flange. The positioning stop is used to be embedded into the mounting hole of the platform, and the flange is used to be flat against the outer surface of the platform.

[0007] Preferably, the right end of the drive shaft and the coupling are both located within the support base.

[0008] In one embodiment, the support base has multiple through holes in its center. These through holes are provided to facilitate loosening or tightening the bolts on the coupling.

[0009] In one embodiment, the number of bearings is two, namely a first bearing and a second bearing, which are separated by a bearing support ring. Using two bearings better ensures the perpendicularity and rotational stability of the drive shaft.

[0010] In one embodiment, the shaft hole on the fixture plate is a stepped hole, and the stepped surface formed by the stepped hole is used to limit the first bearing, while the second bearing is limited by a bearing retaining ring.

[0011] In one embodiment, the drive shaft is a stepped shaft.

[0012] In one embodiment, the coupling is a double diaphragm coupling.

[0013] In one embodiment, an oil inlet pipe and an oil outlet pipe are mounted on the clamp plate. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall exploded structure of the clamp in the embodiment of this utility model;

[0015] Figure 2 This is a cross-sectional view of the fixture after it has been installed on the stand in this embodiment of the present invention.

[0016] The attached diagram is labeled as follows: 1. Fixture plate; 2. Support base; 3. Drive shaft; 4. Coupling; 5. Oil inlet pipe; 6. Oil outlet pipe; 7. Bearing; 8. Bearing support ring; 9. Bearing retaining ring; 10. Stand; 11. Motor shaft. Detailed Implementation

[0017] To facilitate understanding by those skilled in the art, the present invention will be further described below with reference to embodiments and accompanying drawings. The content mentioned in the embodiments is not intended to limit the present invention.

[0018] It should be noted in advance that, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing" in this utility model should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0019] like Figure 1 , 2As shown, a fixture for testing an oil pump includes a fixture plate 1, a support base 2, a drive shaft 3, a coupling 4, an oil inlet pipe 5, and an oil outlet pipe 6. The drive shaft 3 is a stepped shaft, and the coupling 4 is a double diaphragm coupling. The fixture plate 1 has a shaft hole, and the drive shaft 3 is installed in the shaft hole of the fixture plate 1 through a bearing 7 and is perpendicular to the right side of the fixture plate 1. The left end of the drive shaft 3 is used to drive the oil pump to be tested. One end of the coupling 4 is fixedly connected to the right end of the drive shaft 3, and the other end of the coupling 4 is used to connect to the motor shaft 11. The left end of the support base 2 is fixed to the right side of the fixture plate 1 by bolts, and the right end of the support base 2 is installed on the test bench 10 through a limiting structure, so that the right side of the fixture plate 1 is parallel to the outer side of the test bench 10. One end of the oil inlet pipe 5 and the oil outlet pipe 6 are both installed on the fixture plate 1.

[0020] like Figure 1 , 2 As shown, the right end of the support base 2 is provided with a positioning stop and a flange. The positioning stop is used to be embedded into the mounting hole of the platform 10, and the flange is used to be flat against the outer side of the platform 10. The right end of the drive shaft 3 and the coupling 4 are both located inside the support base 2. In order to facilitate loosening or tightening the bolts on the coupling 4, the middle part of the support base 2 is provided with multiple through holes.

[0021] like Figure 1 , 2 As shown, in order to better ensure the perpendicularity and rotational stability of the drive shaft 3, there are two bearings 7, namely the first bearing and the second bearing, which are separated by the bearing support plate 8; the shaft hole on the fixture plate 1 is a stepped hole, and the stepped surface formed by the stepped hole is used to limit the first bearing, while the second bearing is limited by the bearing retaining ring 9.

[0022] In this embodiment, since the drive shaft 3 is perpendicular to the right side of the clamp plate 1, and the right side of the clamp plate 1 is parallel to the outer side of the frame 10 through the support seat 2, it means that the drive shaft 3 and the coupling 4 installed on the drive shaft 3 are perpendicular to the outer side of the frame 10. This ensures the coaxiality of the drive shaft 3 and the motor shaft 11, thereby improving the installation accuracy of the drive shaft 3 and the center of the oil pump rotor.

[0023] The above embodiments are preferred implementations of this utility model. In addition, this utility model can also be implemented in other ways. Any obvious substitutions without departing from the concept of this technical solution are within the protection scope of this utility model.

[0024] To facilitate understanding by those skilled in the art of the improvements of this utility model over the prior art, some of the drawings and descriptions of this utility model have been simplified, and for clarity, some other elements have been omitted from this application. Those skilled in the art should realize that these omitted elements may also constitute the content of this utility model.

Claims

1. A fixture for testing an oil pump, characterized by: The utility model relates to a test fixture for oil pump, which comprises a clamp plate (1), a support base (2), a transmission shaft (3) and a coupling (4), the clamp plate (1) is provided with a shaft hole, the transmission shaft (3) is installed in the shaft hole of the clamp plate (1) through a bearing (7) and is perpendicular to the right side of the clamp plate (1), the left end of the transmission shaft (3) is used to drive the oil pump to be tested, one end of the coupling (4) is fixedly connected with the right end of the transmission shaft (3), the other end of the coupling (4) is used to connect a motor shaft (11), the left end of the support base (2) is fixed on the right side of the clamp plate (1) through bolts, the right end of the support base (2) is installed on a rack (10) through a limiting structure, so that the right side of the clamp plate (1) is kept parallel with the outer side of the rack (10).

2. The oil pump test fixture of claim 1, wherein: The right end of the support base (2) is provided with a positioning stop and a flange plate, the positioning stop is used to be embedded into the mounting hole of the rack (10), and the flange plate is used to be flatly pasted to the outer side of the rack (10).

3. The oil pump test fixture of claim 1 or 2, wherein: The right end of the transmission shaft (3) and the coupling (4) are located in the support base (2).

4. The oil pump test fixture of claim 3, wherein: The middle part of the support base (2) is provided with a plurality of through holes.

5. The oil pump test fixture of claim 1 or 2, wherein: The number of the bearing (7) is two, which are a first bearing and a second bearing, and the two bearings (7) are separated by a bearing support ring (8).

6. The oil pump test fixture of claim 5, wherein: The shaft hole on the clamp plate (1) is a stepped hole, and the stepped surface formed by the stepped hole is used to limit the first bearing, and the second bearing is limited by a bearing retainer (9).

7. The oil pump test fixture of claim 1 or 2, wherein: The transmission shaft (3) is a stepped shaft.

8. The oil pump test fixture of claim 1 or 2, wherein: The coupling (4) is a double diaphragm coupling.

9. The oil pump test fixture of claim 1 or 2, wherein: The clamp plate (1) is provided with an oil inlet pipe (5) and an oil outlet pipe (6).

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