Ball screw bearing efficiency test equipment

Abstract

A ball screw bearing efficiency test device disclosed by the present invention comprises a tool table and a tested screw rod, the tested screw rod is composed of a screw rod shaft and a screw rod sleeve which is used for sleeving the screw rod shaft and is movably matched with the screw rod shaft so as to perform sliding motion along the axis direction of the screw rod shaft, and the tool table is provided with a driving seat, a test seat and a sliding seat. The tested screw rod is located in the test seat, and the drive seat is provided with a first drive member used for driving the screw rod shaft to move and a first detection member used for cooperating with the first drive member to detect the torque generated when the screw rod shaft moves. The tool table is provided with a loading screw rod and a second driving part used for driving the loading screw rod to do relative sliding motion in the axis direction of the tested screw rod. A loading part used for being matched with the second driving part to apply an axial load to the transmission sleeve is arranged between the loading screw rod and the screw rod sleeve. The problem that in the prior art, no detection equipment for detecting the efficiency of the ball screw matched with the MKC2 operating system exists is solved.

Description

Technical Field

[0001] The invention relates to the technical field, and in particular to a ball screw bearing efficiency testing device. Background Art

[0002] MK_C2 (electromechanical braking system) is the ultimate application of future intelligent braking and efficient braking. In the MK_C2 system, the ball screw is an essential mechanical component, which specifically refers to the MK_C2 ball screw. Currently, the market usually has detection equipment for detecting ABS screws, but the prior art lacks a detection equipment for detecting the efficiency of MK_C2 screws, and the equipment is required to fully run the transmission process of the MK_C2 screw and detect its efficiency before the screw is transmitted. Summary of the invention

[0003] In view of the shortcomings of the prior art, the present invention provides a ball screw bearing efficiency testing device to solve the problem in the prior art that there is a lack of a testing device for testing the efficiency of a ball screw adapted to the MK_C2 operating system.

[0004] To achieve the above-mentioned purpose, the present invention provides a ball screw bearing efficiency testing device, including a workbench and a test screw, the test screw is composed of a screw shaft and a screw sleeve for being sleeved on the screw shaft and movably cooperating with the screw shaft to slide along the axial direction of the screw shaft, the workbench is provided with a driving seat, a test seat and a sliding seat, the test screw is located in the test seat, the driving seat is provided with a first driving member for driving the screw shaft to move and a first detection member for cooperating with the first driving member to detect the torque generated when the screw shaft moves, the workbench is provided with a loading screw and a second driving member for driving the loading screw to slide relative to the axial direction of the test screw, and a loading member for cooperating with the second driving member to apply an axial load to the transmission sleeve is provided between the loading screw and the screw sleeve.

[0005] The advantages of adopting the above technical solution are as follows: in the above technology, the test screw is located in the test seat, and the second driving member drives the loading screw to make relative sliding motion along the axis direction of the test screw, and when the loading screw makes relative sliding motion, the loading member cooperates with the loading screw to apply axial load to the test screw through the transmission sleeve, so as to simulate the load condition of the test screw during actual operation, and the first driving member drives the screw shaft to move, and the first detection member detects the torque generated by its activity during the movement of the screw shaft, and the overall operation process of the test screw is completed through the above steps, and the first detection member is used to detect the torque generated when the test screw moves, and then the efficiency of the test screw is calculated by the formula, that is, during the operation of the traditional ball screw, the driving force is applied to the screw, the screw rotates, and the nut moves through the ball, and this process is called the positive transmission of the ball screw. The positive transmission efficiency is the ratio of the output power to the input power of the ball screw pair in the case of positive transmission, that is, the ratio of the output work to the input work at the same time, that is, the ball screw efficiency is calculated by this formula:

[0006] Wherein, F is the axial load of the screw, that is, the load applied by the loading part to the screw, and P is the lead of the screw, that is, the travel distance, and T is the driving torque of the screw. The above calculation method is used to detect the efficiency of the tested screw, so as to improve the detection accuracy and efficiency. At the same time, the cooperation of the first drive member and the second drive member allows the tested screw to complete the entire stroke to complete the detection. At the same time, the actual operating process conditions of the tested screw are simulated, thereby improving the detection efficiency and accuracy. In the above technology, the formula can be calculated by external intelligent working condition equipment or system. At the same time, the first detection member, the first drive member, and the second drive member are all connected to the external intelligent industrial control system for communication, so as to realize the automatic detection and automatic calculation of the efficiency of the tested screw.

[0007] The present invention is further provided that: the loading screw is composed of a transmission shaft and a transmission sleeve used to be sleeved on the transmission shaft and movably cooperate with the transmission shaft to slide along the axial direction of the transmission shaft; the second driving member includes a second driving motor arranged on the workbench; the output end of the second driving motor is coaxially connected to the transmission shaft; the transmission sleeve is fixedly connected to the loading member; and the loading screw is coaxially aligned with the test screw.

[0008] The benefits of adopting the above technical solution are: the transmission shaft of the loading screw is rotated by running the second drive motor, and the transmission shaft and the transmission sleeve are arranged in cooperation so that when the transmission shaft rotates, the transmission sleeve is displaced on the transmission shaft along the axial direction of the transmission shaft, and the transmission sleeve is cooperated with the loading member so that when the transmission sleeve slides, the loading member applies an axial load to the test screw, thereby realizing load support on the test screw, thereby meeting the detection requirements and improving the detection efficiency and detection accuracy.

[0009] The present invention is further configured as follows: the sliding seat is slidably arranged on the workbench along the axial direction of the tested screw rod, a loading groove is opened on the sliding seat, a movable plate is arranged in the loading groove, the movable plate is coaxially connected to the screw rod sleeve, a loading spring is connected between the inner wall of the movable plate and the inner wall of the loading groove, the loading spring is the loading part, and the transmission sleeve is connected to the outer wall of the sliding seat.

[0010] The benefits of adopting the above technical solution are: in the above technology, when the transmission sleeve slides, the transmission sleeve is connected to the outer wall of the sliding seat, so that the sliding seat shifts along the axial direction of the transmission sleeve. Since a loading spring is connected between the inner wall of the loading groove and the inner wall of the movable plate, when the movable plate is fixed and the sliding seat slides toward the test screw, the loading spring will be squeezed and contracted. At this time, the loading spring contracts to generate a deformation mechanical force, which acts on the movable plate and is transmitted to the screw sleeve through the movable plate, thereby realizing the axial load support of the test screw, thereby meeting the detection requirements and improving the detection efficiency and detection accuracy.

[0011] The present invention further provides that: a guide shaft is connected between the inner walls on both sides of the loading groove, and the loading spring is sleeved on the guide shaft.

[0012] The benefits of adopting the above technical solution are: the guide shaft is set to ensure that the extension and retraction direction of the loading spring is restricted, thereby avoiding the deviation of the load direction applied by the loading spring, and at the same time ensuring that the axial load applied by the loading spring can be applied to the movable plate, and ensuring the coaxiality of the loading spring and the test screw rod, thereby avoiding affecting the detection accuracy.

[0013] The present invention further provides that: a guide rail is provided on the tooling table along the sliding direction of the sliding seat, a sliding block is provided on the bottom wall of the sliding seat, and the sliding block is slidably arranged on the guide rail.

[0014] The benefits of adopting the above technical solution are: the sliding direction of the sliding seat is restricted by the setting of the slider and the guide rail, and at the same time, the sliding of the sliding seat is positioned, thereby avoiding the sliding direction of the sliding seat from being offset and affecting the direction of the load applied by the loading spring, and at the same time ensuring the coaxiality between the sliding seat and the test seat, thereby ensuring the coaxiality of the loading spring and the test screw, and avoiding affecting the detection accuracy.

[0015] The present invention further provides that: the driving seat and the test seat are both provided with a through groove for the guide rail to pass through.

[0016] The advantages of adopting the above technical solution are: the coaxiality between the sliding seat and the test seat is ensured by setting the through groove, thereby ensuring the coaxiality between the loading spring and the tested lead screw, avoiding the detection accuracy being affected.

[0017] The present invention is further provided that: a force sensor is connected between the movable plate and the screw sleeve.

[0018] The advantages of adopting the above technical solution are: the magnitude of the axial load applied can be detected in real time by setting a force sensor, so as to facilitate real-time feedback to the external intelligent industrial control system, thereby facilitating the external intelligent industrial control system to calculate the efficiency of the tested screw in real time.

[0019] The present invention further provides that: a linkage shaft coaxially connected to the screw shaft is provided on the test seat, the first driving member includes a first driving motor arranged on the driving seat, and the output end of the first driving motor is a driving end coaxially cooperating with the linkage shaft to drive the linkage shaft to rotate.

[0020] The benefit of adopting the above technical solution is that: through the setting of the linkage shaft and the first drive motor, the screw shaft is driven to rotate axially when the first drive motor is started, so that after the axial load is applied, the first drive motor and the second drive motor are synchronously operated to make the test screw and the loading screw run synchronously, that is, they run simultaneously while ensuring that the compression of the loading spring remains unchanged (that is, the load remains unchanged), and the MK_C2 process is completed, thereby improving the detection efficiency and detection accuracy.

[0021] The present invention further provides that: a torque sensor is connected between the driving end of the first driving motor and the linkage shaft.

[0022] The above technical solution is beneficial in that the torque of the tested screw rod is detected by a torque sensor during transmission, thereby facilitating efficiency calculation of the tested screw rod, thereby improving detection efficiency and detection accuracy.

[0023] The present invention further provides that: a plurality of limit grooves are opened on the workbench along the axis direction of the tested screw rod, and the plurality of limit grooves are arranged along the width direction of the workbench, and the driving seat and the test seat are detachably connected to adjacent limit grooves with a plurality of fixing bolts.

[0024] The benefits of adopting the above technical solution are: the setting of limit grooves and fixing bolts makes it easy to install the equipment on the workbench, and at the same time, the distance between the sliding seat and the test seat is adjusted according to the required detection stroke and required detection efficiency of the tested screw rod, thereby improving the detection range and detection adaptability. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a three-dimensional view of the present invention;

[0026] Figure 2 for Figure 1 Remove the 3D view of the workbench. DETAILED DESCRIPTION

[0027] The present invention provides a spring-loaded ball screw shaft 11 bearing efficiency test device, comprising a workbench 1 and a tested screw, wherein the tested screw is composed of a screw shaft 11 and a screw sleeve 12 used to be sleeved on the screw shaft 11 and movably cooperate with the screw shaft 11 to slide along the axial direction of the screw shaft 11, the workbench 1 is provided with a driving seat 2, a test seat 3 and a sliding seat 4, the tested screw is located in the test seat 3, the driving seat 2 is provided with a first driving member for driving the screw shaft 11 to move and a first detection member for cooperating with the first driving member to detect the torque generated when the screw shaft 11 moves, the workbench 1 is provided with a loading screw and a first detection member for driving the loading screw to slide along the axial direction of the tested screw shaft 11 A second driving member, a loading member for cooperating with the second driving member to apply an axial load to the transmission sleeve 22 is arranged between the loading screw and the screw sleeve 12, the loading screw is composed of a transmission shaft 21 and a transmission sleeve 22 for being sleeved on the transmission shaft 21 and movably cooperating with the transmission shaft 21 to make relative sliding movement along the axial direction of the transmission shaft 21, the second driving member includes a second driving motor 23 arranged on the workbench 1, the output end of the second driving motor 23 is coaxially connected to the transmission shaft 21, the transmission sleeve 22 is fixedly connected to the loading member, the loading screw is coaxially aligned with the tested screw, the sliding seat 4 is slidingly arranged on the workbench 1 along the linear direction of the tested screw shaft 11, and a sliding seat 4 is provided There is a loading slot 41, in which a movable plate 42 is arranged, and the movable plate 42 is coaxially connected with the screw sleeve 12. A loading spring 43 is connected between the inner wall of the movable plate 42 and the inner wall of the loading slot 41, and the loading spring 43 is a loading member. The transmission sleeve 22 is connected to the outer wall of the sliding seat 4, and a guide shaft 44 is connected between the inner walls on both sides of the loading slot 41. The loading spring 43 is sleeved on the guide shaft 44. A guide rail 13 is opened on the workbench 1 along the sliding direction of the sliding seat 4, and a slider 45 is arranged on the bottom wall of the sliding seat 4. The slider 45 is slidably set on the guide rail 13. The driving seat 2 and the test seat 3 are both provided with a through groove 31 for the guide rail 13 to pass through. A force sensor 46 is connected between 42 and the screw sleeve 12, and a linkage shaft 32 for being coaxially connected to the screw shaft 11 is arranged on the test seat 3. The first driving member includes a first driving motor 33 arranged on the driving seat 2, and the output end of the first driving motor 33 is a driving end for coaxially cooperating with the linkage shaft 32 to drive the linkage shaft 32 to rotate. A torque sensor 34 is connected between the driving end of the first driving motor 33 and the linkage shaft 32. A plurality of limit grooves 14 are opened on the workbench 1 along the linear direction of the tested screw shaft 11, and the plurality of limit grooves 14 are arranged along the width direction of the workbench 1, and the drive seat 2 and the test seat 3 are detachably connected to the adjacent limit grooves 14 with a plurality of fixing bolts 15.

[0028] The basic principles and main features of the present invention and the advantages of the present invention are shown and described above. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for illustrating the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which shall fall within the scope of the present invention to be protected. The scope of protection of the present invention shall be defined by the attached claims and their equivalents.

Claims

1. A ball screw bearing efficiency test device, comprising a workbench and a test screw, wherein the test screw is composed of a screw shaft and a screw sleeve for sleeved on the screw shaft and movably matched with the screw shaft to slide along the axial direction of the screw shaft, characterized in that: A driving seat, a test seat and a sliding seat are arranged on the workbench, the test screw is located in the test seat, a first driving member for driving the screw shaft to move and a first detection member for cooperating with the first driving member to detect the torque generated when the screw shaft moves are arranged on the driving seat, a loading screw and a second driving member for driving the loading screw to make a relative sliding motion along the axis direction of the test screw are arranged on the workbench, and a loading member for cooperating with the second driving member to apply an axial load to the transmission sleeve is arranged between the loading screw and the screw sleeve.

2. A ball screw bearing efficiency testing device according to claim 1, characterized in that: The loading screw is composed of a transmission shaft and a transmission sleeve for being sleeved on the transmission shaft and movably cooperating with the transmission shaft to slide along the axial direction of the transmission shaft. The second driving member includes a second driving motor arranged on the workbench, and the output end of the second driving motor is coaxially connected to the transmission shaft. The transmission sleeve is fixedly connected to the loading member, and the loading screw is coaxially aligned with the test screw.

3. The ball screw bearing efficiency testing device according to claim 2, characterized in that: The sliding seat is set on the workbench for sliding along the axial direction of the tested screw rod. A loading groove is opened on the sliding seat. A movable plate is set in the loading groove. The movable plate is coaxially connected with the screw rod sleeve. A loading spring is connected between the inner wall of the movable plate and the inner wall of the loading groove. The loading spring is the loading part. The transmission sleeve is connected to the outer wall of the sliding seat.

4. The ball screw bearing efficiency testing device according to claim 3, characterized in that: A guide shaft is connected between the inner walls on both sides of the loading groove, and the loading spring is sleeved on the guide shaft.

5. The ball screw bearing efficiency testing device according to claim 2, characterized in that: A guide rail is provided on the workbench along the sliding direction of the sliding seat, a sliding block is provided on the bottom wall of the sliding seat, and the sliding block is slidably arranged on the guide rail.

6. The ball screw bearing efficiency testing device according to claim 5, characterized in that: The driving seat and the test seat are both provided with through grooves for the guide rails to pass through.

7. The ball screw bearing efficiency testing device according to claim 3, characterized in that: A force sensor is connected between the movable plate and the screw sleeve.

8. The ball screw bearing efficiency testing device according to claim 1, characterized in that: The test seat is provided with a linkage shaft for being coaxially connected with the screw shaft. The first driving member includes a first driving motor arranged on the driving seat. The output end of the first driving motor is a driving end for coaxially cooperating with the linkage shaft to drive the linkage shaft to rotate.

9. The ball screw bearing efficiency testing device according to claim 8, characterized in that: A torque sensor is connected between the driving end of the first driving motor and the linkage shaft.

10. The ball screw bearing efficiency testing device according to claim 1, characterized in that: The workbench is provided with a plurality of limit grooves along the axis direction of the tested screw rod, and the plurality of limit grooves are arranged along the width direction of the workbench. The drive seat and the test seat are both detachably connected to adjacent limit grooves by a plurality of fixing bolts.

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