A motor temperature rise test bench

Abstract

The present invention discloses a motor temperature rise test bench, comprising a support platform, a first slide rail, a first driving block, a second slide rail, a contact member, a lifting block, a direction limiting head and a power assembly. The first slide rail is tilted. A plurality of first driving blocks are rotatably arranged on the first slide rail, and a torsion spring is provided at the connection position between the two. A plurality of second driving blocks are fixedly arranged on the second slide rail. The contact member is fixedly connected to the second slide rail. The lifting block is fixedly arranged, and the lifting block includes a rising surface, and a return channel is provided below the lifting block. A first slide rail and a second slide rail are provided, and the second slide rail can be driven to reciprocate by the power assembly. When the second slide rail moves upward, it can drive the motor upward. When the second slide rail resets downward, the motor does not move downward under the support of the first slide rail; such reciprocating movement enables the motor to gradually move up to the support platform along the first slide rail without the need for manual labor to carry it up and down.

Description

Technical Field

[0001] The present invention relates to the technical field of motor test benches, and in particular to a motor temperature rise test bench. Background Art

[0002] An electric motor (commonly known as a "motor") is an electromagnetic device that converts or transmits electrical energy based on the law of electromagnetic induction, or converts one form of electrical energy into another. In circuits, it is represented by the letter M (D in older standards). Its primary function is to generate driving torque, serving as a power source for electrical appliances and various machines.

[0003] During operation, motors require various inspections to ensure proper operation. These inspections include: a comprehensive visual inspection and record-keeping; checking all motor components for vibration, noise, and abnormalities, and ensuring normal temperatures; inspecting the oil supply system and lubricating bearings; checking the ventilation and cooling system, sliding friction, and tightening of all components. Other inspections during operation include: vibration and noise; odor and smoke; normal temperatures and any local overheating; stable motor operation; normal three-phase current input power; and balanced three-phase voltage and current for fluctuations.

[0004] During use, the above items can be inspected by staff. However, when measuring and studying motor parameters or conducting quality inspections after motor production, the requirements for test data are relatively high, and it is necessary to use a corresponding test bench to test the corresponding items of the motor.

[0005] For example, an existing Chinese utility model patent with the publication number CN 217034177 U discloses a dump truck reduction motor test bench, including a platform, a mounting seat, a support seat, and a detection device. The dump truck reduction motor test bench can be used to test the motor. Furthermore, an existing Chinese invention patent application with the publication number CN 114518535 A discloses a permanent magnet motor experimental test bench, including an experimental bench and a centering device installed on the experimental bench; the centering device includes: a mounting fixture for mounting the motor to be tested; a first adjustment component, which is connected to the mounting fixture for driving the mounting fixture to move in a first direction; a second adjustment component, which is connected to the mounting fixture for driving the mounting fixture to move in a second direction; and a third adjustment component, which is connected to the mounting fixture for driving the mounting fixture to move in a third direction. The experimental test bench includes an adjustment component that can facilitate the adjustment of the position of the motor to be tested during use so that the motor to be tested and the load motor are well aligned.

[0006] However, since the test bench is at a certain height difference from the ground, and the motor transport equipment commonly used in motor production workshops is a hydraulic trolley, which is also at a height difference from the position where the motor is installed on the test bench, in actual use, the motor to be tested needs to be transported to the room where the test bench is located by the hydraulic trolley. When replacing the motor to be tested, the motor to be tested needs to be manually moved. First, the tested motor on the test bench is moved down, and then the new motor to be tested is moved to the test bench. If it is a small motor, it does not require too much effort. If it is a medium-sized motor, it is relatively heavy, and manual handling is more difficult. The test bench often involves multiple motors for testing and inspection, so the motor needs to be replaced multiple times, which places a heavy burden on the operator. Summary of the Invention

[0007] The technical problem solved by the present invention is that the motor to be tested on the test bench needs to be carried manually when it is replaced, and medium-sized motors are difficult to carry and replace.

[0008] The purpose of the present invention can be achieved through the following technical solutions:

[0009] A motor temperature rise test bench, comprising:

[0010] Support platform;

[0011] a first slide rail, wherein the first slide rail is arranged obliquely, and an upper end of the first slide rail is located at a top surface of the support platform;

[0012] a plurality of first driving blocks, the plurality of first driving blocks being rotatably disposed on the first slide rail, and a torsion spring being disposed at a connection position between the first driving blocks and the first slide rail; wherein the first driving blocks are located below a top surface of the first slide rail when in a retracted state, and free ends of the first driving blocks protrude from the top surface of the first slide rail when in an extended state;

[0013] a second slide rail, wherein a plurality of second driving blocks are fixedly provided on the second slide rail, and the second driving blocks are tilted toward a direction close to the support platform;

[0014] a contact member, the contact member being fixedly connected to the second slide rail;

[0015] A lifting block is fixedly arranged and includes a rising surface, and a return channel is provided below the lifting block;

[0016] A direction limiting head, the direction limiting head being arranged at the position of the return channel;

[0017] A power assembly is used to drive the second slide rail to reciprocate.

[0018] As a further solution of the present invention: a descending plate is provided on the side of the support platform away from the first slide rail, a sliding head is fixedly provided on the descending plate, the sliding head is connected to the support platform for up and down sliding, and a compression spring is provided under the sliding head.

[0019] As a further solution of the present invention: an energy absorbing block is provided under the descent control plate, and the energy absorbing block is detachably connected to the support platform.

[0020] As a further solution of the present invention: an arc-shaped guide portion is fixedly provided at the lower end of the first slide rail.

[0021] As a further solution of the present invention: the direction limiting head is rotatably connected to the base, and a torsion spring is provided at the connection position between the two. A limiting groove is provided on the base, and one end of the direction limiting head is located in the limiting groove. In the free state, the other end of the direction limiting head is flush with the rising surface.

[0022] As a further solution of the present invention: a contact inclined surface is provided at one end of the contact member away from the second slide rail, and the contact inclined surface matches the rising surface.

[0023] As a further solution of the present invention: the longitudinal cross-section profile of the contact piece is cylindrical.

[0024] As a further solution of the present invention: a slow-down surface is further provided on the lifting block, and the slope of the slow-down surface is greater than the slope of the rising surface.

[0025] As a further solution of the present invention: the power assembly includes a power source and a driving rod, and the driving rod is fixedly connected to the second slide rail; the power source is fixedly arranged, and the output end of the power source is driven and connected to a cam, and the side of the cam is in contact with the driving rod.

[0026] A motor temperature rise test bench according to the present invention has at least one of the following technical effects:

[0027] (1) A first slide rail and a second slide rail are provided, and a plurality of first driving blocks and a second driving block are provided on the first slide rail and the second slide rail respectively. The second slide rail can be driven to reciprocate by a power assembly. When the second slide rail moves upward, it can drive the motor upward. When the second slide rail is reset downward, the motor does not move downward under the support of the first slide rail. Such reciprocating movement enables the motor to gradually move up to the support platform along the first slide rail without the need for manual labor to carry it up and down;

[0028] (2) The height of the second slide rail changes slowly during the climbing process, there is no rigid impact, and the impact force perpendicular to the second slide rail is small. There is no need to worry about the motor directly falling off the first slide rail due to excessive impact of the second slide rail on the motor;

[0029] (3) A descending plate is provided to assist in descending the motor after the test, without the need for manual handling, thus reducing the workload and burden on operators.

[0030] Additional aspects and advantages of the present invention will be set forth in part in the description which follows and, in part, will be obvious from the description which follows, or may be learned by practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the following description of the embodiments with reference to the accompanying drawings, in which:

[0032] Figure 1 It is a structural schematic diagram of the existing motor of the present invention;

[0033] Figure 2 It is a schematic structural diagram of the present invention from a top view;

[0034] Figure 3 It is a schematic structural diagram of the present invention from the side;

[0035] Figure 4 This invention Figure 3 A schematic diagram of the partially enlarged structure at center A;

[0036] Figure 5 This invention Figure 4 A schematic structural diagram of another embodiment of the lifting block;

[0037] Figure 6 This invention Figure 3 Schematic diagram of the structure with a partial enlargement at point B.

[0038] In the figure: 100, support platform; 101, first slide rail; 102, first driving block; 103, second slide rail; 104, second driving block; 105, contact member; 106, lifting block; 107, rising surface; 108, return channel; 109, direction limiting head; 110, slow-down plate; 111, sliding head; 112, energy absorbing block; 113, slow-down surface; 114, driving rod; 115, cam. DETAILED DESCRIPTION

[0039] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0040] In the description of the present invention, it should be understood that descriptions involving orientations, such as up, down, front, back, left, right, etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they cannot be understood as limitations on the present invention.

[0041] In the description of the present invention, "several" means one or more, "many" means more than two, "greater than," "less than," and "exceed" are understood to exclude the number itself, while "above," "below," and "within" are understood to include the number itself. The use of "first" and "second" in the description is solely for the purpose of distinguishing technical features and should not be construed as indicating or implying relative importance, implicitly specifying the number of the indicated technical features, or implicitly specifying the order of the indicated technical features.

[0042] See also Figure 1-6 As shown, the present invention provides a motor test bench for motor detection experiments, mainly used as a research test bench for medium-sized special-purpose motors, specifically a motor temperature rise test bench, including a support platform 100, a first slide rail 101, a first driving block 102, a second slide rail 103, a contact member 105, a lifting block 106, a direction limiting head 109, and a power assembly. The first slide rail 101 is arranged at an angle, and the upper end of the first slide rail 101 is located at the top surface of the support platform 100. Multiple first driving blocks 102 are rotatably arranged on the first slide rail 101, and a torsion spring is provided at the connection between the two. When the first driving block 102 is in a retracted state, it is located below the top surface of the first slide rail 101. When the first driving block 102 is in an open state, the free end of the first driving block 102 protrudes from the top surface of the first slide rail 101. Multiple second driving blocks 104 are fixedly arranged on the second slide rail 103, and the second driving blocks 104 are arranged at an angle toward the support platform 100. Contact member 105 is fixedly connected to second slide rail 103. Lifting block 106 is fixedly mounted and includes a raised surface 107. A return channel 108 is disposed below lifting block 106. A direction limiting head 109 is disposed at the location of return channel 108. A power assembly is used to drive reciprocating motion of second slide rail 103.

[0043] See also Figure 2-3 In one embodiment of the present invention, a support platform 100 provides a support structure for mounting various components of the test bench and also serves as a test operating platform. The support platform 100 may include a support column or support rod structure and a table surface for placing test equipment. A mounting frame is provided on the support platform 100 for mounting the motor under test. The mounting frame can be driven by a linear drive structure. The linear drive structure may include three groups, each of which is used to adjust the position of the mounting frame in different directions to achieve a central connection between the motor under test and the load motor.

[0044] See also Figure 2-4 In one embodiment of the present invention, the first slide rail 101 is arranged at an angle, and the upper end of the first slide rail 101 is located at the top surface of the support platform 100; the upper end of the first slide rail 101 can be placed on the edge of the top surface of the support platform 100, or the upper end of the first slide rail 101 can be installed on the support platform 100. The upper end of the first slide rail 101 is flush with the top surface of the support platform 100 or higher than the top surface of the support platform 100, so that the motor to be tested can be transferred to the support platform 100 along the slide rail. The first slide rail 101 includes two plate-like or rod-like structures arranged side by side. The first slide rail 101 can be set separately or in a bracket. The upper end and lower end of the first slide rail 101 can be fixed with arc-shaped guide portions respectively for guiding the transition.

[0045] See also Figure 2-4 In one embodiment of the present invention, a plurality of first driving blocks 102 are provided on the first slide rail 101, and the first driving blocks 102 are arranged to be tilted upward relative to the first slide rail 101. Furthermore, the first driving blocks 102 and the first slide rail 101 can be rotatably connected, and a torsion spring is provided at the connection position between the two. The torsion spring is used to drive the first driving blocks 102 to be in an open state, that is, to make the free ends of the first driving blocks 102 tend to protrude from the top surface of the first slide rail 101. When the first driving blocks 102 are in the retracted state, they are located below the top surface of the first slide rail 101. When the first driving blocks 102 are in the open state, the free ends of the first driving blocks 102 protrude from the top surface of the first slide rail 101.

[0046] See also Figure 2-4 In one embodiment of the present invention, a plurality of second driving blocks 104 are fixedly mounted on the second slide rail 103, and the second driving blocks 104 are tilted toward the support platform 100. The gaps between the second driving blocks 104 correspond to the size of the motor mounting base, or the second driving blocks 104 are configured to have the same rotational connection structure as the first driving blocks 102. The second slide rail 103 is movably mounted, and when the second driving blocks 104 move along with the second slide rail 103, when the second slide rail 103 is in a lower position relative to the first slide rail 101, the plane formed by the free ends of the second driving blocks 104 (i.e., the end of the second driving blocks 104 away from the second slide rail 103) is lower than the top surface of the first slide rail 101. When the second slide rail 103 is in a higher position, the plane on which the free ends of the second driving blocks 104 lie is higher than the plane on which the free ends of the first driving blocks 102 lie (i.e., the end of the first driving blocks 102 away from the first slide rail 101).

[0047] See also Figure 4In one embodiment of the present invention, the contact member 105 is located below the second slide rail 103 and is fixedly connected to the second slide rail 103. The contact member 105 can be fixedly connected to the bottom surface of the second slide rail 103 via a connecting rod or other structure. A lifting block 106 is also provided below the second slide rail 103. The lifting block 106 is fixedly provided. Specifically, the lifting block 106 can be connected to the first slide rail 101 via a bracket structure. The lifting block 106 includes a lifting surface 107, that is, the lifting block 106 is provided with an inclined plane. The contact member 105 matches the lifting surface 107. When the contact member 105 moves along the lifting surface 107, the relative position height of the second slide rail 103 can be changed. A return channel 108 is provided below the lifting block 106. The return channel 108 matches the size of the contact member 105, so that the contact member 105 can slide along the return channel 108. A direction limiting head 109 is provided at the lower end of the return channel 108 to limit the moving direction of the contact member 105 in the return channel 108 , that is, the contact member 105 can only move downward along the return channel 108 .

[0048] See also Figure 4 In one embodiment of the present invention, the specific structure of the direction limiting head 109 is not limited, and the direction limiting head 109 can be made to swing in only one direction by setting a hinge structure. It can also be limited by a convex point structure, or a groove structure. As an example, the direction limiting head 109 is rotatably connected to the base, and a torsion spring is provided at the position where the two are connected. A limiting groove is provided on the base, and one end of the direction limiting head 109 is located in the limiting groove. In the free state, the other end of the direction limiting head 109 is flush with the rising surface 107. The freedom of the direction limiting head 109 to swing to the left is locked by the limiting groove, and it only has the freedom to swing to the right, so that when the contact member 105 moves to the lower right along the return channel 108, it can prompt the direction limiting head 109 to swing, and when the contact member 105 moves in the direction, it will be blocked by the action of the direction limiting head 109, and then climb to the position of the lifting block 106 and move along the rising surface 107.

[0049] See also Figure 4-5In one embodiment of the present invention, specifically, the specific structure of the contact member 105 is not limited. As an example, a contact slope is provided at one end of the contact member 105 away from the second slide rail 103, and the contact slope matches the rising surface 107. When in use, the contact slope fits with the rising surface 107 so that the contact member 105 can climb along the rising surface 107 as it moves with the second slide rail 103. The longitudinal cross-sectional profile of the contact member 105 can also be cylindrical. The cylindrical contact member 105 makes it more adaptable. Furthermore, a descending surface 113 is also provided on the lifting block 106, and the slope of the descending surface 113 is greater than the slope of the rising surface 107, so that the contact member 105 contacts the descending surface 113 after leaving the rising surface 107, thereby reducing the rate of change of the height of the second slide rail 103 and improving the stability of the lifting device.

[0050] See also Figure 6 In one embodiment of the present invention, a power assembly is used to drive the second slide rail 103 to reciprocate. The specific structure of the power assembly is not limited. As an example, the power assembly includes a power source and a driving rod 114. The driving rod 114 is fixedly connected to the second slide rail 103. The power source is fixedly arranged, and the output end of the power source is drivingly connected to a cam 115. The side surface of the cam 115 is in contact with the driving rod 114. During use, the power source drives the cam 115 to rotate. When the cam 115 rotates, it contacts the driving rod 114. The change in position of the side surface of the cam 115 drives the driving rod 114 to reciprocate, thereby driving the second slide rail 103 to reciprocate.

[0051] See also Figure 2-3 In one embodiment of the present invention, a descending plate 110 is provided on the side of the support platform 100 away from the first slide rail 101. A sliding head 111 is fixedly provided on the descending plate 110. The sliding head 111 is connected to the support platform 100 for sliding up and down, and a compression spring is provided under the sliding head 111. The descending plate 110 is used to assist in replacing the motor after inspection, and the compression spring plays a buffering role. Furthermore, an energy absorbing block 112 is provided under the descending plate 110, and the energy absorbing block 112 is detachably connected to the support platform 100. The energy absorbing block 112 can limit the lowest position of the descending plate 110, and the energy absorbing block 112 can be disassembled and repositioned so as to be adjusted according to different usage conditions.

[0052] Working principle of the present invention:

[0053] Motor temperature refers to the actual heat generated by various motor components. It significantly impacts the motor's insulation material. Excessively high temperatures can cause insulation aging, shortening the motor's lifespan and even leading to insulation failure. To prevent insulation aging and failure and ensure safe and proper operation of the motor, it is necessary to monitor and measure the temperature of other components, such as the motor windings and core. The temperature of various motor components also depends on external conditions. Temperature rise is the difference between the motor's temperature and the ambient temperature. To verify the lifespan and stability of electronic products, the temperature rise of key components is often tested. The motor under test is operated at a specific temperature (T = 70°C) above its rated operating temperature (T = 25°C). After stabilization, the temperature rise of the components above the ambient temperature is recorded to verify the design. Temperature rise depends on the heat generation and heat dissipation during motor operation, and is often used to determine whether the motor is dissipating heat properly. The lifespan of the motor's insulation material is closely related to the operating temperature. Therefore, accurate temperature measurement of various components during motor temperature rise testing is crucial for improving motor design and manufacturing processes, thereby enhancing motor quality.

[0054] See also Figure 1Existing motors typically have a mounting structure (mounting seat) at the bottom for ease of installation. When using this device for a motor temperature rise test, the motor to be tested is first transferred to the lower end of the first slide rail 101. The motor is then moved so that its mounting seat contacts the top surface of the first slide rail 101. In the initial state, the second slide rail 103 is in a low position, and the plane on which the free end of the second driving block 104 lies is below the plane on which the top surface of the first slide rail 101 lies. At this point, the base of the motor abuts the top surface of the first slide rail 101. The power source then drives cam 115 to rotate, and as cam 115 rotates, it contacts drive rod 114. The change in position of the side of cam 115 causes drive rod 114 to move toward the upper left, driving second slide rail 103 toward the upper left. During this process, because the direction limiting head 109's freedom to swing leftward is limited, contact member 105 can only move along the right side of direction limiting head 109. Contact member 105 then moves to the position of lifting block 106 and contacts rising surface 107. During this process, contact member 105, under the action of rising surface 107, drives second slide rail 103 to climb. That is, while second slide rail 103 moves toward the upper left, it also experiences displacement perpendicular to the direction of second slide rail 103. During this process, second slide rail 103 will extend beyond the plane of the top surface of first slide rail 101. At this point, second drive block 104 can contact the bottom surface of the mounting base of the motor under test and drive the motor under test toward the upper left. Until the contact member 105 disengages from the rising surface 107, the height position of the second slide rail 103 relative to the first slide rail 101 is lowered, and the motor to be tested falls on the first slide rail 101, pressing down the first driving block 102 in the area where the mounting seat is located, and preventing it from sliding down under the abutment of the first driving block 102 below (in the open state). At the same time, the contact member 105 moves to the lower right along the return channel 108 until it returns to its initial position. During this process, when the contact member 105 moves to the position of the direction limiting head 109, it will drive it to swing to the right until the contact member 105 passes the direction limiting head 109, and the direction limiting head 109 is reset under the action of the torsion spring. Specifically, the reset and fall of the second slide rail 103 can be achieved by its own weight or by an elastic member. In this way, the second slide rail 103 continuously reciprocates. When the second slide rail 103 moves upward, it can drive the motor to be tested to move upward for a distance. When the second slide rail 103 resets downward, the motor does not fall under the action of the first slide rail 101. This cycle repeats, continuously raising the height of the motor under test until it is finally transported to the support table 100. The motor under test is then moved to the mounting frame and fixed for temperature rise testing. After the test is completed, the motor is moved to the descending plate 110, allowing it to fall above the descending plate 110 and then gradually descend along with the descending plate 110. During this process, the compression spring below the descending plate 110 accumulates energy, slowing the motor down until it reaches a certain height. The motor is then transferred to a hydraulic trolley and transported outside the laboratory.

[0055] Specifically, the method of temperature rise test can be as follows:

[0056] The test is based on Article 6 of GB / T18488.2-2015 "Drive Motor Systems for Electric Vehicles Part 2: Test Methods".

[0057] The test conditions are rated conditions, starting from the cold state, and lasting for 60 minutes. If the temperature of the stator winding end reaches 150°C during the test, the test will automatically stop and terminate.

[0058] At the beginning of the test, at the end of the test, and during the test (every 5 minutes), record the motor's voltage 1U, current 1I, frequency 1f, input power 1P, power factor, output power 2P, input torque M, and speed n. Automatically record the test data.

[0059] During the temperature test, measurements are taken using the motor's built-in temperature sensor. The temperatures of the motor base surface (two locations), bearings, cooling water inlet and outlet, and the temperature sensor are recorded at the start of the test, immediately after shutdown, and every five minutes during the test. Test data is automatically recorded.

[0060] The temperature acquisition method can be as follows:

[0061] Thermometer Method: The thermometer method measures temperature by attaching a thermometer to an accessible surface. The measured temperature is the surface temperature of the measured point. To minimize errors, heat conduction from the measured point to the thermometer is optimized, and the spherical surface of the thermometer is covered with insulating material to prevent interference from the surrounding cooling medium. In addition to expansion thermometers such as mercury and alcohol, thermometers also include semiconductor thermometers, non-buried thermocouples, and resistance thermometers. Mercury thermometers should not be used in motors where an alternating magnetic field is present, as the alternating magnetic field generates eddy currents in the mercury, which can generate heat and affect measurement accuracy.

[0062] Embedded Thermometer Method: This method involves embedding a resistance thermometer, thermocouple, or semiconductor thermistor in an inaccessible area inside the motor, such as the stator winding slots and core. Connecting wires lead to a secondary instrument outside the motor to measure the temperature. The measurement current and duration should be controlled to avoid errors caused by heating. Each sensing element should be in close contact with the surface of the measured point to effectively prevent the cooling medium from affecting the temperature. This method measures the local temperature at the measuring point. Generally, the thermometer should be embedded in the expected hottest area, and for motor winding temperatures, at least six thermometers should be installed. This method can also be used to monitor local temperature rise in the motor.

[0063] The above is a detailed description of an embodiment of the present invention. However, the content described is only a preferred embodiment of the present invention and should not be considered to limit the scope of the present invention. All equivalent changes and improvements made within the scope of the present invention should still fall within the scope of the claims of the present invention.

Claims

1. A motor temperature rise test bench, comprising a support platform (100), characterized in that: Also includes: A first slide rail (101), wherein the first slide rail (101) is arranged at an angle, and the upper end of the first slide rail (101) is located at the top surface of the support platform (100); A plurality of first driving blocks (102), wherein the plurality of first driving blocks (102) are rotatably arranged on the first slide rail (101), and a torsion spring is arranged at a connection position between the two. When the first driving blocks (102) are in a retracted state, they are located below the top surface of the first slide rail (101); when the first driving blocks (102) are in an extended state, the free ends of the first driving blocks (102) protrude from the top surface of the first slide rail (101); A second slide rail (103), wherein a plurality of second driving blocks (104) are fixedly arranged on the second slide rail (103), and the second driving blocks (104) are tilted toward a direction close to the support platform (100); a contact member (105), the contact member (105) being fixedly connected to the second slide rail (103); A lifting block (106), wherein the lifting block (106) is fixedly arranged and includes a rising surface (107), and a return channel (108) is arranged below the lifting block (106); A direction limiting head (109), the direction limiting head (109) being arranged at the position of the return channel (108); a power assembly, the power assembly being used to drive the second slide rail (103) to reciprocate; When the device is used for the motor temperature rise test, the motor to be tested is first transferred to the lower end of the first slide rail (101), and then the motor to be tested is pushed so that the mounting seat of the motor to be tested contacts the top surface of the first slide rail (101). In the initial state, the second slide rail (103) is in a low position, and the plane where the free end of the second driving block (104) is located is below the plane where the top surface of the first slide rail (101) is located; at this time, the base of the motor abuts the top surface of the first slide rail (101), and then the power component drives the second slide rail (103) to move upward. ) moves to the upper left. During this process, since the freedom of the direction limiting head (109) to swing to the left is limited, the contact member (105) can only move along the right side of the direction limiting head (109). Then the contact member (105) moves to the position of the lifting block (106) and contacts the rising surface (107). During this process, the contact member (105) drives the second slide rail (103) to do a climbing movement under the action of the rising surface (107). That is, while the second slide rail (103) moves to the upper left, it also has There is a displacement perpendicular to the direction of the second slide rail (103). During this process, the second slide rail (103) will exceed the plane where the top surface of the first slide rail (101) is located. At this time, the second driving block (104) can contact the bottom surface of the mounting seat of the motor to be tested and drive the motor to be tested to move to the upper left until the contact member (105) is separated from the rising surface (107). The height position of the second slide rail (103) relative to the first slide rail (101) is reduced, and the motor to be tested falls on the first slide rail (101), and the mounting seat is The first driving block (102) in the area where the seat is located is pressed down, and is prevented from sliding down under the abutment of the first driving block (102) below. At the same time, the contact member (105) moves to the lower right along the return channel (108) until it returns to the initial position. During this process, when the contact member (105) moves to the position of the direction limiting head (109), it drives it to swing to the right until the contact member (105) passes over the direction limiting head (109), and the direction limiting head (109) is reset under the action of the torsion spring; In this way, the second slide rail (103) continuously reciprocates, and when the second slide rail (103) moves upward, it can drive the motor to be tested to move upward for a distance. When the second slide rail (103) is reset downward, the motor does not descend under the action of the first slide rail (101). This cycle is repeated to continuously increase the height of the motor to be tested, and finally the motor to be tested is transported to the support platform (100), and then the motor to be tested is pushed to the mounting frame and fixed for temperature rise test.

2. A motor temperature rise test bench according to claim 1, characterized in that: A descending plate (110) is provided on a side of the support platform (100) away from the first slide rail (101), a sliding head (111) is fixedly provided on the descending plate (110), the sliding head (111) is connected to the support platform (100) in an up-and-down sliding manner, and a compression spring is provided below the sliding head (111).

3. A motor temperature rise test bench according to claim 2, characterized in that: An energy absorbing block (112) is provided below the descending plate (110), and the energy absorbing block (112) is detachably connected to the support platform (100).

4. The motor temperature rise test bench according to claim 1, characterized in that: An arc-shaped guide portion is fixedly provided at the lower end of the first slide rail (101).

5. The motor temperature rise test bench according to claim 1, characterized in that: The direction limiting head (109) is rotatably connected to the base, and a torsion spring is provided at the connection position between the two. A limiting groove is provided on the base, and one end of the direction limiting head (109) is located in the limiting groove. In a free state, the other end of the direction limiting head (109) is flush with the rising surface (107).

6. The motor temperature rise test bench according to claim 1, characterized in that: An end of the contact member (105) away from the second slide rail (103) is provided with a contact inclined surface, and the contact inclined surface matches the rising surface (107).

7. The motor temperature rise test bench according to claim 1, characterized in that: The contact piece (105) has a cylindrical longitudinal cross-sectional profile.

8. The motor temperature rise test bench according to claim 7, characterized in that: The lifting block (106) is also provided with a slow-down surface (113), and the slope of the slow-down surface (113) is greater than the slope of the ascending surface (107).

9. A motor temperature rise test bench according to any one of claims 1 to 8, characterized in that: The power assembly includes a power source and a driving rod (114), wherein the driving rod (114) is fixedly connected to the second slide rail (103); the power source is fixedly arranged, and the output end of the power source is drivingly connected to a cam (115), and the side surface of the cam (115) is in contact with the driving rod (114).

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