EMB high and low temperature efficiency testing machine

Abstract

The invention discloses an EMB high and low temperature efficiency testing machine which 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, the screw rod sleeve is used for being arranged on the screw rod shaft in a sleeving mode and movably matched with the screw rod shaft so as to slide in the axis direction of the screw rod shaft, and a testing seat is arranged on the tool table. The test seat is provided with a temperature control member which is used for accommodating the tested screw rod and controlling the test temperature condition of the tested screw rod when the tested screw rod is tested. The tool table is provided with a loading screw rod, a first driving member used for driving the loading screw rod to move relatively along the axis direction of the tested screw rod, and a loading member used for cooperating with the first driving member to apply an axial load to the screw rod sleeve when the loading screw rod moves relatively. The tool table is provided with a second driving piece used for driving the lead screw shaft to rotate in the axial direction. The problem that in the prior art, detection equipment for detecting the efficiency of the EMB lead screw bearing and simulating the actual operation temperature working condition of the lead screw bearing is lacked is solved.

Description

Technical Field

[0001] The invention relates to the technical field of EMB screw bearing detection equipment, in particular to an EMB high and low temperature efficiency testing machine. Background Art

[0002] EMB (Electromechanical Braking System) is the ultimate application of intelligent braking and efficient braking in the future. In the EMB system, the ball screw is an essential mechanical component, which specifically refers to the EMB ball screw, that is, the EMB ball screw planetary pin. The EMB ball screw planetary pin is an important component in the electric hydraulic braking system, which can convert the rotational motion of the motor into the linear motion of the brake to achieve the braking function. The EMB screw is usually used in conjunction with the electric pump unit and the electronic control unit, while the screw in the ABS system is usually used in conjunction with the pressure control module. At present, there are usually detection devices on the market for detecting ABS screws, but the prior art lacks a detection device for detecting the efficiency of the EMB screw and requires the device to fully run the transmission process of the EMB screw and detect its efficiency before the screw is transmitted. At the same time, the prior art lacks a detection device for simulating the actual operating temperature conditions of the screw during the EMB screw efficiency detection process. Summary of the invention

[0003] In view of the shortcomings of the prior art, the present invention provides an EMB high and low temperature efficiency testing machine to solve the problem of detection equipment used to detect the efficiency of EMB screw bearings and simulate the actual operating temperature conditions of screw bearings.

[0004] To achieve the above-mentioned purpose, the present invention provides an EMB high and low temperature efficiency testing machine, including a workbench and a test screw, the test screw is composed of a screw shaft and a screw sleeve used to be sleeved on the screw shaft and movably cooperate with the screw shaft to slide along the axial direction of the screw shaft, the workbench is provided with a test seat, the test seat is provided with a temperature control unit for accommodating the test screw and controlling the test temperature condition of the test screw when the test screw is tested, the workbench is provided with a loading screw, a first driving member for driving the loading screw to move relative to the axial direction of the test screw, and a loading member for cooperating with the first driving member to apply an axial load to the screw sleeve when the loading screw moves relatively, and the workbench is provided with a second driving member for driving the screw shaft to rotate axially.

[0005] The advantages of adopting the above technical scheme are as follows: when the efficiency of the test screw is tested, the temperature around the test screw can be controlled by the temperature control unit to meet the operating conditions of the test screw, that is, to simulate the surrounding temperature conditions and operating temperature conditions of the test screw during actual operation, thereby improving the detection accuracy; when the efficiency of the test screw is tested, the first drive member drives the loading screw to move relative to the axis of the test screw, and at the same time, when the loading screw moves relative to each other, the loading member cooperates with the loading screw to apply an axial load to the test screw, thereby simulating the load condition of the test screw during actual operation, and the second drive member drives the screw shaft to move, and torque is generated during the movement of the screw shaft. The overall operation process of the test screw is completed through the above steps, and then the efficiency of the test screw is calculated through 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. 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 in the same time. The ball screw efficiency is calculated by this formula:

[0006]

[0007] 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 drive member and the second drive member are both 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.

[0008] The present invention further provides: 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 make sliding motion along the axial direction of the transmission shaft; the loading screw is coaxially aligned with the test screw; a loading plate is provided between the transmission sleeve and the screw sleeve; the loading plate is slidably provided between the transmission sleeve and the screw sleeve along the axial direction of the loading screw; the starting end of the transmission sleeve is coaxially connected to the loading plate; a linkage shaft is coaxially connected to the screw sleeve of the test screw; a fixed plate is provided between the linkage shaft and the loading plate; the fixed plate is coaxially connected to the end of the linkage shaft; the loader is provided between the loading plate and the fixed plate.

[0009] The benefits of adopting the above technical solution are: in the above technology, when the first driving member drives the loading screw to make a relative sliding motion along the axial direction of the test screw, the transmission sleeve makes a relative sliding motion on the transmission shaft, so that the sliding of the transmission sleeve drives the sliding of the loading plate, and when the loading plate slides toward the fixed plate, the loading member is located between the loading plate and the fixed plate, so that the loading member is affected by the loading plate to apply an axial load to the screw sleeve, thereby realizing the load support of the test screw, thereby meeting the detection requirements and improving the detection efficiency and detection accuracy.

[0010] The present invention further provides that: a driving seat is provided on the workbench, the first driving member includes a first driving motor provided on the driving seat, and an output end of the first driving motor is coaxially connected to a transmission shaft.

[0011] The benefits of adopting the above technical solution are: the transmission shaft of the loading screw is rotated by running the first 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 plate, so that when the transmission sleeve slides, it will drive the loading plate to move and then cooperate with the loading member, so that 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.

[0012] The present invention is further configured as follows: a plurality of loading springs are connected between the loading plate and the fixed plate, a guide shaft is provided on the fixed plate corresponding to each loading spring position, a through hole is provided on the loading plate corresponding to each guide shaft position for the guide shaft to pass through, the loading spring is the loading part, the starting end of the loading spring is connected to the inner wall of the fixed plate, the end of the loading spring is connected to the inner wall of the loading plate, and the loading spring is sleeved on the guide shaft.

[0013] 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 loading plate, so that the loading plate shifts along the axis direction of the transmission sleeve toward the fixed plate. Since a number of loading springs are connected between the loading plate and the fixed plate, when the fixed plate is fixed and the loading plate 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 fixed plate and is transmitted to the screw sleeve through the fixed plate, thereby achieving axial load support on the test screw, thereby meeting the detection requirements and improving detection efficiency and detection accuracy; in the above technology, the loading spring is positioned by a guide shaft to ensure that the expansion and contraction direction of the loading spring is restricted, thereby avoiding deviation in the direction of load 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 fixed plate, and ensuring the coaxiality of the loading spring and the test screw, thereby avoiding affecting the detection accuracy.

[0014] The present invention further provides that: a plurality of the loading springs are distributed in a quadrilateral shape.

[0015] The benefit of adopting the above technical solution is that: in the above technology, several loading springs are distributed in a quadrilateral shape, thereby ensuring the stability of the load applied by the loading springs and the uniformity of the load distribution.

[0016] The present invention further provides that: four guide rods are connected between the driving seat and the test seat, the four guide rods are distributed in a quadrangular shape, and a sliding hole for the guide rod to pass through is opened on the loading plate corresponding to each guide rod position.

[0017] The benefits of adopting the above technical solution are: in the above technology, the stability of the sliding of the loading plate is ensured by setting the guide rod and the sliding hole, and the sliding direction of the loading plate is guided and limited by the guide rod, thereby avoiding the sliding direction of the loading plate from being offset and affecting the direction of the load applied by the loading spring, thereby ensuring the coaxiality of the loading spring and the test screw rod, and avoiding affecting the detection accuracy.

[0018] The present invention further provides that: a force sensor is connected between the fixing plate and the linkage shaft.

[0019] 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.

[0020] The present invention further provides that: the temperature control unit includes a high and low temperature control cabinet arranged on the test seat, and the high and low temperature control cabinet is provided with a cavity for accommodating the tested screw rod.

[0021] The benefits of adopting the above technical solution are: controlling and adjusting the operating temperature conditions of the test screw rod through a high and low temperature control cabinet, and controlling the temperature range to be -50° to 200°, so as to meet the operating conditions of the test screw rod, that is, simulating the surrounding temperature conditions and operating temperature conditions of the test screw rod during actual operation, thereby improving the detection accuracy.

[0022] The present invention further provides that: 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 screw shaft.

[0023] The benefit of adopting the above technical solution is that: by setting up a second drive motor, it is used to drive the screw shaft to rotate axially when the second 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 EMB screw process is completed, thereby improving the detection efficiency and detection accuracy.

[0024] The present invention further provides that: a torque sensor is connected between the second drive motor and the screw shaft.

[0025] The above technical solution is beneficial in that the torque of the tested screw rod during transmission is detected by a torque sensor, thereby facilitating efficiency calculation of the tested screw rod, thereby improving detection efficiency and detection accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a three-dimensional view of the present invention;

[0027] Figure 2 This is a partial three-dimensional view of the present invention after removing the workbench and other components. DETAILED DESCRIPTION

[0028] The present invention provides an EMB high and low temperature efficiency tester, comprising a workbench 1 and a tested screw rod, wherein the tested screw rod is composed of a screw rod shaft 11 and a screw rod sleeve 12 used to be sleeved on the screw rod shaft 11 and movably cooperate with the screw rod shaft 11 to slide along the axial direction of the screw rod shaft 11, a test seat 2 is arranged on the workbench 1, and a temperature control unit is arranged on the test seat 2 for accommodating the tested screw rod and controlling the test temperature condition of the tested screw rod when the tested screw rod is tested, a loading screw rod, a first driving member used to drive the loading screw rod to move relatively along the linear direction of the tested screw rod shaft 11, and a loading member used to cooperate with the first driving member to apply an axial load to the screw rod sleeve 12 when the loading screw rod moves relatively, and a test seat 2 is arranged on the workbench 1. A second driving member for driving the screw shaft 11 to rotate axially, the loading screw is composed of a transmission shaft 3 and a transmission sleeve 31 for being sleeved on the transmission shaft 3 and movably cooperating with the transmission shaft 3 to slide along the axial direction of the transmission shaft 3, the loading screw is coaxially aligned with the tested screw, a loading plate 32 is arranged between the transmission sleeve 31 and the screw sleeve 12, the loading plate 32 is slidably arranged between the transmission sleeve 31 and the screw sleeve 12 along the linear direction of the loading screw shaft 11, the starting end of the transmission sleeve 31 is coaxially connected to the loading plate 32, a linkage shaft 121 is coaxially connected to the screw sleeve 12 of the tested screw, a fixing plate 21 is arranged between the linkage shaft 121 and the loading plate 32, the fixing plate 21 is coaxial with the end of the linkage shaft 121 The loading member is arranged between the loading plate 32 and the fixed plate 21, and a driving seat 4 is arranged on the workbench 1. The first driving member includes a first driving motor 41 arranged on the driving seat 4. The output end of the first driving motor 41 is coaxially connected with the transmission shaft 3. A plurality of loading springs 33 are connected between the loading plate 32 and the fixed plate 21. A guide shaft 211 is arranged on the fixed plate 21 corresponding to each position of the loading spring 33. A through hole 321 for the guide shaft 211 to pass through is opened on the loading plate 32 corresponding to each position of the guide shaft 211. The loading spring 33 is the loading member. The starting end of the loading spring 33 is connected to the inner wall of the fixed plate 21, and the end of the loading spring 33 is connected to the inner wall of the loading plate 32. The wall is connected, the loading spring 33 is sleeved on the guide shaft 211, and several of the loading springs 33 are distributed in a quadrangular shape. Four guide rods 42 are connected between the driving seat 4 and the test seat 2, and the four guide rods 42 are distributed in a quadrangular shape. A sliding hole 322 for the guide rod 42 to pass through is opened on the loading plate 32 corresponding to each guide rod 42 position. A force sensor 22 is connected between the fixing plate 21 and the linkage shaft 121. The temperature control unit includes a high and low temperature control cabinet 23 arranged on the test seat 2, and a cavity for accommodating the tested screw rod is opened in the high and low temperature control cabinet 23. The second driving member includes a second driving motor 5 arranged on the workbench 1, and the output end of the second driving motor 5 is coaxially connected with the screw shaft 11.A torque sensor 51 is connected between the second driving motor 5 and the screw shaft 11.

[0029] 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. An EMB high and low temperature efficiency tester, comprising a workbench and a tested screw, wherein the tested screw is composed of a screw shaft and a screw sleeve which is sleeved on the screw shaft and movably cooperates with the screw shaft to slide along the axial direction of the screw shaft, and is characterized in that: A test seat is provided on the workbench, and a temperature control unit is provided on the test seat for accommodating a test screw and controlling the test temperature condition of the test screw during the test of the test screw. A loading screw, a first driving member for driving the loading screw to move relative to the axis of the test screw, and a loading member for cooperating with the first driving member to apply an axial load to the screw sleeve when the loading screw moves relative to each other are provided on the workbench. A second driving member is provided on the workbench for driving the screw shaft to rotate axially.

2. The EMB high and low temperature efficiency tester 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 make sliding motion along the axial direction of the transmission shaft. The loading screw is coaxially aligned with the test screw, a loading plate is arranged between the transmission sleeve and the screw sleeve, the loading plate is slidably arranged between the transmission sleeve and the screw sleeve along the axial direction of the loading screw, the starting end of the transmission sleeve is coaxially connected to the loading plate, a linkage shaft is coaxially connected to the screw sleeve of the test screw, a fixed plate is arranged between the linkage shaft and the loading plate, the fixed plate is coaxially connected to the end of the linkage shaft, and the loader is arranged between the loading plate and the fixed plate.

3. The EMB high and low temperature efficiency tester according to claim 2, characterized in that: A driving seat is arranged on the tooling table, and the first driving member comprises a first driving motor arranged on the driving seat, and an output end of the first driving motor is coaxially connected with a transmission shaft.

4. The EMB high and low temperature efficiency tester according to claim 3, characterized in that: A number of loading springs are connected between the loading plate and the fixed plate, a guide shaft is provided on the fixed plate corresponding to each loading spring position, a through hole is provided on the loading plate corresponding to each guide shaft position for the guide shaft to pass through, the loading spring is the loading part, the starting end of the loading spring is connected to the inner wall of the fixed plate, the end of the loading spring is connected to the inner wall of the loading plate, and the loading spring is sleeved on the guide shaft.

5. The EMB high and low temperature efficiency tester according to claim 4, characterized in that: The plurality of loading springs are distributed in a quadrilateral shape.

6. The EMB high and low temperature efficiency tester according to claim 3, characterized in that: Four guide rods are connected between the driving seat and the test seat, and the four guide rods are distributed in a quadrangular shape. A sliding hole for the guide rod to pass through is opened on the loading plate corresponding to each guide rod position.

7. The EMB high and low temperature efficiency tester according to claim 2, characterized in that: A force sensor is connected between the fixing plate and the linkage shaft.

8. The EMB high and low temperature efficiency tester according to claim 1, characterized in that: The temperature control unit comprises a high and low temperature control cabinet arranged on a test seat, and a cavity for accommodating the tested screw rod is opened in the high and low temperature control cabinet.

9. The EMB high and low temperature efficiency tester according to claim 1, characterized in that: The second driving member includes a second driving motor disposed on the workbench, and an output end of the second driving motor is coaxially connected to the screw shaft.

10. The EMB high and low temperature efficiency tester according to claim 9, characterized in that: A torque sensor is connected between the second driving motor and the screw shaft.

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