Movable lifting platform

Abstract

The utility model relates to the technical field of workpiece testing, in particular to a movable type lifting platform which comprises a lifting flat plate arranged on a test bed, a test piece is installed on the lifting flat plate, and the lifting flat plate can move relative to the test bed so as to adjust the height of the test piece. According to the invention, the test motor is installed on the lifting flat plate, so that the test motor can move along with the lifting flat plate, the height of the test motor on the test bench is adjusted, and the height adjustment of the axis of the output shaft of the test motor can be better realized; the height of the axis of the output shaft of the test motor is adjusted by adjusting the height of the lifting flat plate, the disassembly, assembly and adjustment efficiency of the test motor can be improved, and operation is more convenient.

Description

Technical Field

[0001] The utility model relates to the technical field of workpiece testing, in particular to a mobile lifting platform. Background Art

[0002] The inverter loading test bench controls the speed and torque of the loaded motor through a four-quadrant inverter, and tests the inverter and variable frequency motor under different simulated working conditions according to relevant test standards.

[0003] Usually the loading end is set on a test platform with a fixed height. However, during testing, the loading end needs to replace different types of test motors. The axial heights of the output shaft ends of different types of test motors are different, which leads to the need to manually adjust the height of the test motor when disassembling or installing the test motor, which is more troublesome. Utility Model Content

[0004] In view of the above problems existing in the prior art, the utility model provides a mobile lifting platform.

[0005] In order to solve the above technical problems, the utility model is solved by the following technical solutions:

[0006] A mobile lifting platform comprises a lifting plate arranged on a test bench, a test piece is installed on the lifting plate, and the lifting plate can move relative to the test bench to adjust the height of the test piece.

[0007] Preferably, a bottom plate is provided on one side of the lifting platform, and the bottom plate is detachably mounted on the test bench;

[0008] The bottom plate is provided with a lifting mechanism connected to the lifting plate, and the lifting mechanism can drive the lifting plate to move relative to the bottom plate.

[0009] Preferably, the lifting mechanism comprises a first servo motor and a transmission screw;

[0010] The first end of the transmission screw is connected to the lifting plate, and the second end is connected to the bottom plate;

[0011] The first servo motor is disposed on the base plate and connected to the transmission screw;

[0012] The first servo motor can drive the transmission screw to drive the lifting plate to move relative to the base plate.

[0013] Preferably, a first mounting seat and a second mounting seat are rotatably provided on the first end and the second end of the transmission screw rod respectively;

[0014] The transmission screw is rotatably connected to the lifting plate and the bottom plate through the first mounting seat and the second mounting seat respectively.

[0015] Preferably, a commutator and a connecting shaft are provided on the bottom plate;

[0016] The first servo motor is connected to the transmission screw through the commutator and the connecting shaft to drive the transmission screw.

[0017] Preferably, the bottom plate is provided with an elongated adjustment slot, and an adjustment plate is arranged in the adjustment slot;

[0018] The adjustment plate is detachably connected to the test bench, and the adjustment plate can reciprocate along the length direction of the adjustment slot to adjust the relative position of the bottom plate and the test bench.

[0019] Preferably, it also includes a second servo motor, an adjusting screw rod and a connecting seat;

[0020] The second servo motor is arranged on the bottom plate; the connecting seat is arranged on the adjusting plate;

[0021] The first end of the adjusting screw rod is connected to the second servo motor, and the second end is connected to the connecting seat;

[0022] The second servo motor can drive the adjustment plate to move in the adjustment slot through the adjustment screw.

[0023] Preferably, a protective cover is provided between the base plate and the lifting plate.

[0024] Preferably, the lifting plate is provided with a through hole, and a measuring column having one end connected to the bottom plate is passed through the through hole; and a scale mark is provided on the measuring column.

[0025] Preferably, the measuring column is provided with a first limiter and a second limiter;

[0026] The first limiting member and the second limiting member are respectively located on two sides of the lifting plate.

[0027] The utility model has at least the following beneficial effects:

[0028] In the present application, the test motor is installed on a lifting platform, so that the test motor can move with the lifting platform, and then the height of the test motor on the test bench can be adjusted, which can better achieve the height adjustment of the axis center of the output shaft of the test motor; the height adjustment of the axis center of the output shaft of the test motor is achieved by adjusting the height of the lifting platform, which can improve the disassembly and adjustment efficiency of the test motor and is more convenient for operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 A schematic diagram of a mobile lifting platform in some embodiments of the present application is shown;

[0030] Figure 2 A schematic diagram of a lifting plate in some embodiments of the present application is shown;

[0031] Figure 3 A schematic diagram of a mobile lifting platform without a lifting plate in some embodiments of the present application is shown;

[0032] Figure 4 A schematic diagram of a mobile lifting platform without a lifting plate and a protective cover in some embodiments of the present application is shown;

[0033] Figure 5 Shows Figure 4 A partial enlarged view of point A in the middle.

[0034] The parts indicated by the numbers in the accompanying drawings are as follows:

[0035] 100, lifting plate; 110, opening; 120, first mounting seat; 130, through hole; 200, bottom plate; 211, first servo motor; 212, transmission screw; 213, first reducer; 220, second mounting seat; 230, commutator; 240, connecting shaft; 250, adjusting slot; 251, adjusting plate; 252, connecting seat; 260, second servo motor; 261, adjusting screw; 262, second reducer; 270, measuring column; 271, scale mark; 272, first limit piece; 273, second limit piece; 300, protective cover. DETAILED DESCRIPTION

[0036] In order to further understand the content of the utility model, the utility model is described in detail in conjunction with the accompanying drawings and embodiments. It should be understood that the embodiments are only used to explain the utility model but not to limit it.

[0037] like Figure 1-5 As shown, this embodiment provides a mobile lifting platform, which is suitable for being installed on a test bench and assisting in testing a workpiece. The mobile lifting platform includes a lifting plate 100, on which a test piece is installed; the lifting plate 100 can move relative to the test bench, so that the test piece can also move relative to the test bench with the lifting plate 100, thereby adjusting the height of the test piece on the test bench.

[0038] It should be noted that the test piece installed on the lifting platform 100 can be a test piece, or can be a test device for testing the test piece.

[0039] In particular, in this embodiment, taking the test piece as a test motor as an example, the test motor is installed on the lifting platform 100, so that the test motor can move with the lifting platform 100, and then adjust the height of the test motor on the test bench, which can better achieve the height adjustment of the axis center of the output shaft of the test motor; by adjusting the height of the lifting platform 100 to achieve the height adjustment of the axis center of the output shaft of the test motor, the disassembly and adjustment efficiency of the test motor can be improved, and it is more convenient to operate.

[0040] In some embodiments, a base plate 200 is provided on one side of the lifting plate 100, and a lifting mechanism connected to the lifting plate 100 is provided on the base plate 200, wherein the lifting plate 100 is installed on the test bench through the base plate 200, and the base plate 200 and the test bench are detachably connected; when the lifting plate 100 is installed on the test bench through the base plate 200, the lifting plate 100 can be driven by the lifting mechanism, so that the lifting plate 100 can move relative to the base plate 200, thereby realizing the movement of the lifting plate 100 relative to the test bench, and realizing the height adjustment of the lifting plate 100 on the test bench.

[0041] Furthermore, since the base plate 200 is detachably connected to the test bench, during actual tests, the mobile lifting platform of this embodiment can be selectively installed according to the needs of the test, and when there is no need to adjust the height of the test piece on the test bench, the mobile lifting platform of this embodiment can be dismantled; of course, the mobile lifting platform of this embodiment can be installed on different test benches as needed, which is convenient and quick and can improve work efficiency.

[0042] In some embodiments, the lifting mechanism includes a first servo motor 211 and a transmission screw 212 installed on the base plate 200; the first end of the transmission screw 212 is rotatably connected to the lifting plate 100, and the second end of the transmission screw 212 is rotatably connected to the base plate 200; the output shaft of the first servo motor 211 is connected to the transmission screw 212, so that the transmission screw 212 can be driven by the first servo motor 211, so that the transmission screw 212 can rotate along its axial direction.

[0043] It can be understood that an opening 110 is also provided on the lifting plate 100 for the first end of the transmission screw 212 to pass through. In this embodiment, when the first servo motor 211 drives the transmission screw 212 to rotate, the relative position between the base plate 200 and the transmission screw 212 will not change, and the lifting plate 100 will move along the axial direction of the transmission screw 212 through the opening 110, thereby realizing the movement of the lifting plate 100 relative to the base plate 200 and realizing the height adjustment of the lifting plate 100 on the test bench.

[0044] Furthermore, in this embodiment, a first servo motor 211 and four transmission screws 212 are provided on the base plate 200. The four transmission screws 212 can play a certain supporting role for the lifting plate 100. The four transmission screws 212 are respectively arranged at the four corners of the lifting plate 100. The four transmission screws 212 are driven simultaneously by a first servo motor 211, so that the four transmission screws 212 have the same rotation amount, which can improve the stability of the lifting plate 100 moving along the axial direction of the transmission screw 212.

[0045] In some embodiments, a first mounting seat 120 corresponding to the position of the opening 110 is provided on the lifting plate 100, and a second mounting seat 220 is provided on the base plate 200. The first end of the transmission screw 212 is rotatably connected to the first mounting seat 120, and the second end of the transmission screw 212 is rotatably connected to the second mounting seat 220.

[0046] Through the structure in this embodiment, when the first servo motor 211 is working, the first servo motor 211 can drive the transmission screw 212 to rotate. Specifically, the first end of the transmission screw 212 can rotate in the first mounting seat 120, so that the first mounting seat 120 can drive the lifting plate 100 to move along the axial direction of the transmission screw 212 through the opening 110, and the second end of the transmission screw 212 can rotate in the second mounting seat 220, and the relative position between the transmission screw 212 and the base plate 200 will not change.

[0047] It can be understood that the second end of the transmission screw 212 and the second mounting seat 220 can be rotationally matched through a bearing and the relative position between the transmission screw 212 and the base plate 200 will not change; and the first end of the transmission screw 212 and the first mounting seat 120 can be rotationally matched through threaded matching and the rotation of the transmission screw 212 can drive the first mounting seat 120 to move along the axial direction of the transmission screw 212.

[0048] Furthermore, the first mounting seat 120 is fixedly mounted on the lifting plate 100 by bolts, and the second mounting seat 220 is fixedly mounted on the base plate 200 by bolts, so as to achieve a stable connection between the first mounting seat 120 and the lifting plate 100 and a stable connection between the second mounting seat 220 and the base plate 200.

[0049] In some embodiments, three commutators 230 and seven connecting shafts 240 are provided on the bottom plate 200. The three commutators 230 are connected by two connecting shafts 240, and the commutator 230 in the middle position is connected to the first servo motor 211 by one connecting shaft 240, and the two commutators 230 in the side positions are respectively connected to two transmission screws 212 by two connecting shafts 240. When the first servo motor 211 is working, the first servo motor 211 can drive the commutator 230 in the middle position through the connecting shaft 240, and then the commutator 230 in the middle position can drive the two commutators 230 in the side positions through the two connecting shafts 240, and then the two commutators 230 in the side positions drive the four transmission screws 212 through the two connecting shafts 240.

[0050] It should be noted that a first reducer 213 is provided on the output shaft of the first servo motor 211 , that is, the first servo motor 211 is connected to the connecting shaft 240 via the first reducer 213 , thereby realizing the connection between the first servo motor 211 and the commutator 230 in the middle position.

[0051] Furthermore, the connecting shaft 240 can be connected to the transmission screw 212 by gear meshing or the like, and there is no particular limitation as long as the connecting shaft 240 can drive the transmission screw 212 so that the transmission screw 212 can rotate.

[0052] It is worth mentioning that, in this embodiment, by setting the commutator 230 and the connecting shaft 240, only one first servo motor 211 is required to drive the four transmission screws 212, which can better simplify the overall structure; at the same time, by driving the first servo motor 211 and driving the four transmission screws 212 simultaneously through the commutator 230 and the connecting shaft 240, the rotation amount of the four transmission screws 212 can be kept consistent, thereby improving the stability of the movement of the lifting platform 100 relative to the base plate 200.

[0053] In some embodiments, an adjustment slot 250 is provided on the bottom plate 200. The adjustment slot 250 is in a long strip shape. An adjustment plate 251 is provided in the adjustment slot 250. The adjustment plate 251 can reciprocate along the length direction of the adjustment slot 250. The adjustment plate 251 can be detachably fixed on the test bench by bolts.

[0054] During use, the mobile lifting platform in this embodiment is first placed on the test bench, and then the adjustment plate 251 is fixedly connected to the test bench by bolts, and then the base plate 200 can be operated to move the base plate 200 on the test bench. At this time, the adjustment plate 251 plays a pre-positioning role for the base plate 200. During the movement of the base plate 200 on the test bench, the adjustment plate 251 moves in the adjustment groove 250 along the length direction of the adjustment groove 250, thereby realizing the adjustment of the position of the base plate 200 on the test bench; after the position between the base plate 200 and the test bench is adjusted, the base plate 200 can be fixedly installed on the test bench by bolts or the like.

[0055] In some embodiments, a second servo motor 260 is provided on the base plate 200, and a connecting seat 252 is provided on the adjusting plate 251; an adjusting screw 261 is provided between the second servo motor 260 and the connecting seat 252, specifically, the first end of the adjusting screw 261 is fixedly connected to the output shaft of the second servo motor 260, and the second end of the adjusting screw 261 is threadedly connected to the connecting seat 252; when the second servo motor 260 is working, the second servo motor 260 can drive the adjusting screw 261 to rotate, and during the rotation of the adjusting screw 261, the connecting seat 252 can be driven to move in the axial direction of the adjusting screw 261, thereby driving the adjusting plate 251 to move in the adjusting slot 250 along the length direction of the adjusting slot 250.

[0056] Furthermore, a second reducer 262 is provided on the output shaft of the second servo motor 260 , that is, the output shaft of the second servo motor 260 is connected to the first end of the adjusting screw 261 through the second reducer 262 to enable the second servo motor 260 to drive the adjusting screw 261 .

[0057] In particular, under the setting of the second servo motor 260, after the adjustment plate 251 is fixedly connected to the test bench, the second servo motor 260 is started. Since the position of the adjustment plate 251 is fixed, the second servo motor 260 can drive the base plate 200 to move, thereby realizing the movement of the adjustment plate 251 in the adjustment slot 250 along the length direction of the adjustment slot 250, thereby realizing the position of the adjustment base plate 200 on the test bench.

[0058] In some embodiments, a protective cover 300 is provided between the base plate 200 and the lifting plate 100. The protective cover 300 is an overall hollow cylindrical structure, and the first end of the protective cover 300 is connected to the base plate 200, and the second end of the protective cover 300 is connected to the lifting plate 100. The protective cover 300 can cover part or all of the devices between the lifting plate 100 and the base plate 200. On the one hand, it can achieve the beauty of the overall mobile lifting platform, and on the other hand, it can protect part or all of the devices between the lifting plate 100 and the base plate 200 to avoid erosion by dust and the like.

[0059] Furthermore, the protective cover 300 in this embodiment adopts a honeycomb cover, and its overall height can change synchronously with the height change of the lifting plate 100, and is effectively connected between the lifting plate 100 and the bottom plate 200 to play a shielding and protective role.

[0060] It should be noted that, in some embodiments, the protective cover 300 can be made of a material that has elastic properties, or can be structurally designed so that its height on the test bench is adjustable.

[0061] In some embodiments, a through hole 130 is provided on the lifting plate 100 , and a measuring column 270 is passed through the through hole 130 , wherein one end of the measuring column 270 is fixedly connected to the bottom plate 200 ; a scale mark 271 is also provided on the measuring column 270 .

[0062] When the first servo motor 211 is working, the first servo motor 211 can indirectly drive the lifting plate 100 to move relative to the base plate 200. While the lifting plate 100 moves along the axial direction of the transmission screw 212, the lifting plate 100 actually moves in the length direction of the measuring column 270. During this process, the staff can observe the measuring column 270. By observing the position of the scale mark 271 on the measuring column 270 corresponding to the lifting plate 100, the distance moved by the lifting plate 100 relative to the base plate 200 can be directly obtained, which is convenient for accurately controlling the height of the lifting plate 100 and facilitating use.

[0063] In some embodiments, a first limit member 272 and a second limit member 273 are provided on the measuring column 270, wherein the first limit member 272 and the second limit member 273 are respectively provided on both sides of the lifting plate 100. Specifically, the first limit member 272 is provided on the side of the lifting plate 100 close to the base plate 200, and the second limit member 273 is provided on the side of the lifting plate 100 away from the base plate 200.

[0064] It can be understood that the first limit member 272 and the second limit member 273 arranged on the measuring column 270 can limit the position of the lifting plate 100; when the lifting plate 100 moves along the axial direction of the transmission screw 212 toward the direction of the base plate 200 until it abuts against the first limit member 272, the first limit member 272 can limit the lifting plate 100 to prevent the lifting plate 100 from further approaching the base plate 200; when the lifting plate 100 moves along the axial direction of the transmission screw 212 toward the direction away from the base plate 200 until it abuts against the second limit member 273, the second limit member 273 can limit the lifting plate 100 to prevent the lifting plate 100 from further moving away from the base plate 200.

[0065] By disposing the first limit member 272 and the second limit member 273, the lifting plate 100 can be better limited, and the lifting plate 100 can only be adjusted in height between the first limit member 272 and the second limit member 273, thereby avoiding imbalance of the overall mechanism and improving safety.

[0066] Furthermore, in some embodiments, a controller may be provided, and the first stopper 272 and the second stopper 273 are contact sensors that are communicatively connected to the first servo motor 211 and the controller; when the lifting plate 100 moves along the axial direction of the transmission screw 212 toward the direction of the base plate 200 until it contacts the first stopper 272, the first stopper 272 can send a trigger signal to the controller, and then the controller controls the first servo motor 211 to stop working; when the lifting plate 100 moves along the axial direction of the transmission screw 212 toward the direction away from the base plate 200 until it contacts the second stopper 273, the second stopper 273 can send a trigger signal to the controller, and then the controller controls the first servo motor 211 to stop working. Through the cooperation between the controller, the first servo motor 211, and the first stopper 272 and the second stopper 273, the idling of the first servo motor 211 can be better avoided, and the service life of the first servo motor 211 can be improved.

[0067] In short, the above is only a preferred embodiment of the present utility model, and all equivalent changes and modifications made according to the scope of the patent application of the present utility model should fall within the scope of the present utility model patent.

Claims

1. A mobile lifting platform, characterized in that: It comprises a lifting plate arranged on the test bench, on which a test piece is mounted, and the lifting plate can be moved relative to the test bench to adjust the height of the test piece; A bottom plate is provided on one side of the lifting platform, and the bottom plate is detachably mounted on the test bench; The bottom plate is provided with a lifting mechanism connected to the lifting plate, and the lifting mechanism can drive the lifting plate to move relative to the bottom plate; The lifting plate is provided with a through hole, and a measuring column with one end connected to the bottom plate is passed through the through hole; and a scale mark is provided on the measuring column.

2. The mobile lifting platform according to claim 1, characterized in that: The lifting mechanism comprises a first servo motor and a transmission screw; The first end of the transmission screw is connected to the lifting plate, and the second end is connected to the bottom plate; The first servo motor is disposed on the base plate and connected to the transmission screw; The first servo motor can drive the transmission screw to drive the lifting plate to move relative to the base plate.

3. The mobile lifting platform according to claim 2, characterized in that: A first mounting seat and a second mounting seat are rotatably provided on the first end and the second end of the transmission screw rod respectively; The transmission screw is rotatably connected to the lifting plate and the bottom plate through the first mounting seat and the second mounting seat respectively.

4. The mobile lifting platform according to claim 2, characterized in that: The bottom plate is provided with a commutator and a connecting shaft; The first servo motor is connected to the transmission screw through the commutator and the connecting shaft to drive the transmission screw.

5. The mobile lifting platform according to claim 1, characterized in that: The bottom plate is provided with a long strip-shaped adjustment groove, and an adjustment plate is arranged in the adjustment groove; The adjustment plate is detachably connected to the test bench, and the adjustment plate can reciprocate along the length direction of the adjustment slot to adjust the relative position of the bottom plate and the test bench.

6. The mobile lifting platform according to claim 5, characterized in that: It also includes a second servo motor, an adjusting screw rod and a connecting seat; The second servo motor is arranged on the bottom plate; the connecting seat is arranged on the adjusting plate; The first end of the adjusting screw rod is connected to the second servo motor, and the second end is connected to the connecting seat; The second servo motor can drive the adjustment plate to move in the adjustment slot through the adjustment screw.

7. The mobile lifting platform according to claim 1, characterized in that: A protective cover is arranged between the bottom plate and the lifting plate.

8. The mobile lifting platform according to claim 1, characterized in that: The measuring column is provided with a first limiter and a second limiter; The first limiting member and the second limiting member are respectively located on two sides of the lifting plate.

Images