A method for automatically inserting oil pump rotor splines
By adding a hydraulic oil circuit to the oil pump test bench and forcing the oil pump to be tested to rotate, the problem of the test bench shaft not being inserted into the oil pump is solved, and the accuracy and efficiency of insertion are improved.
Patent Information
- Application Number
- CN202411933247.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-26
- Publication Date
- 2025-04-08
AI Technical Summary
During the oil pump testing process, the test bench shaft cannot be inserted into the oil pump, resulting in the need to take out the oil pump and clamp it again, which is inefficient and seriously affects the production efficiency of the equipment.
A hydraulic oil circuit is added to directly connect the oil circuit between the internal oil pump of the test bench and the oil pump to be tested. The oil circuit with oil pressure is used to force the oil pump to be tested to rotate to ensure that the splines of the test bench shaft and the splines of the oil pump are staggered, thereby realizing automatic insertion.
Improve the accuracy and efficiency of insertion of the test bench shaft, and avoid the problem of insufficiency caused by the synchronous rotation of the oil pump and the test bench shaft.
Smart Images
Figure CN119778247A_ABST
Abstract
Description
Technical Field
[0001] The invention relates to the technical field of oil pump testing methods, and more specifically to an automatic spline insertion method for an oil pump rotor. Background Art
[0002] Some transmission hydraulic control modules contain cycloid lubricating oil pumps, whose inner rotors are connected to the drive shaft using splines. When the hydraulic control module is tested off-line, the test bench needs to insert its own spline shaft into the spline of the product under test. The traditional method is to contact the end of the spline shaft of the test bench with the end of the spline of the oil pump and apply a certain amount of pressure, rotate the spline shaft, and make the spline shaft and the oil pump spline rotate relative to each other. When the relative angles are consistent, the test bench spline can be inserted into the spline end of the oil pump.
[0003] In the actual testing process, people found that: since the rotor of the oil pump can rotate under very small torque without oil pressure, when the spline shaft of the test bench rotates, the rotor of the oil pump is often driven by the friction force generated by the pressure at the spline end, that is, the oil pump and the test bench spline rotate synchronously without relative speed. In this way, the test bench shaft cannot be inserted into the oil pump, and the oil pump needs to be removed from the test bench and clamped again. The re-clamping process is time-consuming and inefficient, which seriously affects the production efficiency of the equipment.
[0004] Therefore, in order to solve the problem that the test bench shaft cannot be inserted into the test oil pump, a method for automatically inserting the oil pump rotor spline is proposed. Summary of the invention
[0005] In order to overcome the above-mentioned defects of the prior art, the present invention provides a method for automatically inserting the splines of an oil pump rotor, by adding a hydraulic oil circuit to directly connect the oil circuit between the oil pump inside the test bench and the oil pump to be tested, so that the oil circuit with oil pressure can be directly connected to the oil pump to be tested, thereby forcing the oil pump to be tested and the test bench shaft to rotate in opposite directions, ensuring that the test bench shaft splines and the oil pump splines can be staggered, thereby improving the insertion efficiency of the test bench shaft, so as to solve the problems arising from the above-mentioned background technology.
[0006] To achieve the above object, the present invention provides the following technical solution: a method for automatically inserting a spline of an oil pump rotor, comprising the following steps: Step 1: Add a hydraulic oil circuit based on the original oil circuit inside the test bench; Step 2: Before testing, connect the oil suction port of the oil pump to be tested to the hydraulic oil circuit with pressure, and let the hydraulic oil drive the oil pump to be tested to rotate; Step 3: After the test bench shaft hits the oil pump spline hole, the test bench shaft and the oil pump to be tested rotate in the opposite direction to ensure that the test bench shaft spline and the oil pump spline can be staggered, and then the test bench shaft spline is inserted into the oil pump spline of the oil pump to be tested; Step 4: Cut the oil suction port of the oil pump to be tested into the original oil line of the test bench to enable the oil pump to be tested to work and test normally.
[0007] In a preferred embodiment, an oil circuit switching valve is provided between the hydraulic oil circuit and the test bench crude oil circuit, and the oil circuit switching valve is adjusted to achieve the switching of the oil pump to be tested between the hydraulic oil circuit and the test bench crude oil circuit.
[0008] In a preferred embodiment, a flow regulating valve is provided in the hydraulic oil circuit for adjusting the pressure and speed of the hydraulic oil imposed on the oil pump to be tested when the spline is inserted, and adjusting the rotation speed of the oil pump to be tested.
[0009] In a preferred embodiment, an oil pump and an oil tank are provided inside the test bench. The oil pump pumps oil into the oil tank, and there is pressure in this section of the oil circuit. The oil pump to be tested draws oil from the oil tank, and there is no pressure in this section of the oil circuit.
[0010] Technical effects and advantages of the present invention: By adding a hydraulic oil circuit to directly connect the oil circuit between the oil pump inside the test bench and the oil pump to be tested, the oil circuit with oil pressure can be directly connected to the oil pump to be tested, thereby forcing the oil pump to be tested to rotate, ensuring that the test bench shaft splines and the oil pump splines can be staggered, and the situation that the test bench shaft rotates with the oil pump rotor to be tested, which occurs on a general test bench and causes the test bench shaft splines to be unable to stagger, will not occur. The method provided by the present invention has high accuracy and efficiency in inserting the test bench shaft. BRIEF DESCRIPTION OF THE DRAWINGS
[0011] Figure 1 It is a schematic diagram of the oil pump to be tested after being connected with the hydraulic oil circuit of the present invention; Figure 2 It is a schematic diagram of the oil pump to be tested after being connected with the oil pipeline of the test bench according to the present invention; Figure 3 This is a schematic diagram of the oil circuit of a traditional test bench; Figure 4 This is a schematic diagram of the test bench shaft spline before it is inserted into the oil pump spline; Figure 5 Schematic diagram of the test bench shaft after the coins are inserted into the oil pump spline.
[0012] The accompanying drawings are marked as follows: 01-Test bench crude oil circuit; 02-Hydraulic oil circuit; 021-Oil circuit switching valve; 022-Flow regulating valve; Test bench; 101-test bench shaft; 102-test bench shaft spline; 103-oil pump; 104-oil tank; 200-Oil pump to be tested; 201-Oil pump spline. DETAILED DESCRIPTION
[0013] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.
[0014] Refer to the instruction manual Figure 3 The original test bench 100 is provided with an oil pump 103 and an oil tank 104. The oil pump 103 pumps oil into the oil tank 104. There is pressure in this section of the oil circuit. The oil pump 200 to be tested draws oil from the oil tank 104. There is no pressure in this section of the oil circuit. When the oil pump 200 to be tested is tested using the test bench 100, the test bench shaft spline 102 needs to be inserted into the oil pump spline 201. However, since there is no pressure in the section where the oil pump 200 to be tested draws oil from the oil tank 104, the oil pump 200 to be tested is occasionally driven to rotate by the friction force at the end of the test bench shaft 101, which will cause the test bench shaft spline 102 to be misaligned and unable to be inserted.
[0015] To solve the above problems, refer to the instructions attached Figure 1 , 2 , 4 and 5, the present invention provides a method for automatically inserting a spline of an oil pump rotor, comprising the following steps: Step 1: Add a hydraulic oil circuit 02 on the basis of the test bench crude oil circuit 01 inside the test bench 100, and an oil circuit switching valve 021 is provided between the hydraulic oil circuit 02 and the test bench crude oil circuit 01, and the oil pump 200 to be tested is switched between the hydraulic oil circuit 02 and the test bench crude oil circuit 01 by adjusting the oil circuit switching valve 021; A flow regulating valve 022 is provided in the hydraulic oil circuit 02, which is used to adjust the pressure and speed of the hydraulic oil imposed on the oil pump 200 to be tested when the spline is inserted, and to adjust the speed of the oil pump 200 to be tested to prevent the test bench shaft 101 from being unable to be inserted due to excessively fast or slow rotation; Step 2: Before the test, connect the oil suction port of the oil pump 200 to the hydraulic oil circuit 02 with pressure, and let the hydraulic oil drive the oil pump 200 to rotate. At this time, the oil pump 200 to be tested is connected with the hydraulic circuit 02, and the oil circuit with oil pressure of the oil pump 103 is connected to the oil pump 200 to be tested, so as to force the oil pump 200 to rotate; Step 3: After the test bench shaft 101 hits the oil pump spline hole, the test bench shaft 101 and the oil pump 200 to be tested rotate in opposite directions to ensure that the test bench shaft spline 102 and the oil pump spline 201 can be staggered, and then the test bench shaft spline 102 is inserted into the oil pump spline 201 of the oil pump to be tested. This will avoid the situation in which the test bench shaft 101 rotates with the pump rotor as in the general test bench 100, resulting in the test bench shaft spline 102 not being staggered, and the shaft insertion efficiency is high; Step 4: Cut the oil suction port of the oil pump 200 to be tested into the original oil line 01 of the test bench 100. There is no pressure inside this section of the oil line, so that the oil pump 200 to be tested can work and test normally.
[0016] Finally: The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.
Claims
1. A method for automatically inserting a spline of an oil pump rotor, characterized in that: The following steps are involved: Step 1: Add a hydraulic oil circuit (02) on the basis of the test bench crude oil circuit (01) inside the test bench (100); Step 2: Before testing, connect the oil suction port of the oil pump to be tested (200) to the hydraulic oil circuit (02) with pressure, so that the hydraulic oil drives the oil pump to be tested to rotate; Step 3: After the test bench shaft (101) is pushed against the oil pump spline hole, the test bench shaft (101) and the oil pump (200) to be tested rotate in opposite directions to ensure that the test bench shaft spline (102) and the oil pump spline (201) can be staggered, and then the test bench shaft spline (102) is inserted into the oil pump spline (201) of the oil pump (100) to be tested; Step 4: Cut the oil suction port of the oil pump (200) to be tested into the test bench crude oil passage (01) of the test bench (100), so that the oil pump (200) to be tested can work normally and be tested.
2. The method for automatically inserting the spline of an oil pump rotor according to claim 1, characterized in that: An oil circuit switching valve (021) is provided between the hydraulic oil circuit (02) and the test bench crude oil circuit (01), and the oil circuit switching valve (021) is adjusted to achieve the switching of the oil pump (200) to be tested between the hydraulic oil circuit (02) and the test bench crude oil circuit (01).
3. The method for automatically inserting the spline of an oil pump rotor according to claim 1, characterized in that: A flow regulating valve (022) is provided in the hydraulic oil circuit (02) for regulating the pressure and speed of the hydraulic oil applied to the oil pump (200) to be tested when the spline is inserted, thereby regulating the rotation speed of the oil pump (200) to be tested.
4. The method for automatically inserting the spline of an oil pump rotor according to claim 1, characterized in that: An oil pump (103) and an oil tank (104) are provided inside the test bench (100); the oil pump (103) pumps oil into the oil tank (104); and the oil pump (200) to be tested draws oil from the inside of the oil tank (104).