Testing device
By designing a testing device that includes a base, a moving plate, and multiple drive mechanisms, the problem of incomplete performance testing of spline screws was solved, and comprehensive and accurate testing of various motion forms of spline screws was achieved.
Patent Information
- Application Number
- CN202422954191.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-29
- Publication Date
- 2025-12-30
- Estimated Expiration
- 2034-11-29
AI Technical Summary
Existing technologies for performance testing of spline screws cannot fully cover their various motion modes, resulting in inaccurate test results.
A testing device was designed, including a base, a movable plate, a first drive mechanism, a second drive mechanism, and a third drive mechanism, which can drive the spline screw to move in different directions, covering vertical movement, rotation, and horizontal swinging motion, and perform comprehensive testing through multiple load components and precision detection components.
It enables comprehensive and accurate testing of spline screw performance, improves the comprehensiveness and accuracy of testing, and covers the testing needs of various motion forms.
Smart Images
Figure CN223741981U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The present application relates to the technical field of robots, in particular to a testing device. BACKGROUND
[0002] SCARA robot (assembly robot) is a cylindrical coordinate type industrial robot, as an important branch of the field of industrial robots, it has been widely used in many industry scenarios at present, such as automobile manufacturing, new energy, semiconductor, hardware processing and so on, because of fast operation cycle, easy deployment, small space occupation and cheaper price than traditional six-axis because of only four-axis.
[0003] Among them, as the key core component of SCARA robot, the performance of spline screw determines the performance level of the whole robot to a certain extent. The spline screw has up-down movement, rotation movement and swing through the cooperation between the robot arm and the small arm in the application process. The performance test of the spline screw in the prior art often cannot fully cover the various motion forms of the spline screw, and cannot obtain more accurate performance test results. CONTENT OF THE UTILITY MODEL
[0004] The present application provides a testing device.
[0005] The present application provides a testing device for detecting the performance of a ball spline screw, the ball spline screw comprising a spline screw shaft and a screw nut and a spline nut successively sleeved on the spline screw shaft, the spline screw shaft having an axis. The testing device comprises a base, a moving plate, a first driving mechanism, a second driving mechanism and a third driving mechanism. The moving plate is movably connected to the base, and the ball spline screw is connected to the moving plate. The first driving mechanism is arranged on the base and is drivingly connected to the moving plate, and is used to drive the spline screw shaft to move relative to the base along a first direction through the moving plate, the first direction intersecting the axis. The second driving mechanism is arranged on the moving plate and is drivingly connected to the screw nut, and is used to drive the spline screw to move relative to the base along a second direction through the screw nut, the second direction being in the same direction as the direction of the axis. The third driving mechanism is arranged on the moving plate and is drivingly connected to the spline nut, and is used to drive the spline screw shaft to rotate relative to the base about the axis through the spline nut.
[0006] In some optional examples, the base is provided with a guide slide rail extending along the first direction, and the moving plate is slidably connected to the base through the guide slide rail; the first driving mechanism comprises a first rotary driving member and a connecting rod transmission assembly, the first rotary driving member is arranged on the base, and the connecting rod transmission assembly is movably connected between the first rotary driving member and the moving plate, and the first rotary driving member is used to drive the moving plate to move along the guide slide rail through the connecting rod transmission assembly.
[0007] In some examples, the connecting rod transmission assembly comprises a first transmission member, a crankshaft and a transmission rod, the first transmission member is transmissionally connected between the crankshaft and the first rotary driving member, and the transmission rod is movably connected between the moving plate and the crankshaft; the first rotary driving member is configured to drive the crankshaft to rotate through the first transmission member.
[0008] In some examples, the first driving mechanism further comprises an encoder, the encoder is connected to the rotating shaft of the crankshaft, and the encoder is configured to monitor the rotating speed of the crankshaft.
[0009] In some examples, the first transmission member comprises a transmission belt, and the first driving mechanism further comprises a tension adjusting member, the tension adjusting member is connected between the base and the first rotary driving member, the tension adjusting member is movably connected to the base, and the tension adjusting member is movable relative to the base to change the position of the first rotary driving member so as to change the center distance between the output shaft of the first rotary driving member and the rotating shaft of the crankshaft.
[0010] In some examples, the second driving mechanism comprises a second rotary driving member and a second transmission member, the second rotary driving member is fixedly connected to the moving plate, and the second transmission member is transmissionally connected between the screw nut and the second rotary driving member; the third driving mechanism comprises a third rotary driving member and a third transmission member, the third rotary driving member is fixedly connected to the moving plate, and the third transmission member is transmissionally connected between the spline nut and the third rotary driving member.
[0011] In some examples, the testing device further comprises a plurality of load members, at least one of the plurality of load members is configured to be detachably connected to one end of the spline screw shaft, and the plurality of load members have different mass distributions.
[0012] In some examples, the testing device further comprises a precision detection assembly, the precision detection assembly comprises a measurement reference member, a first detection member and a second detection member, the measurement reference member is configured to be connected to one end of the spline screw shaft, the first detection member and the second detection member are both connected to the base, the first detection member is configured to detect the movement precision of the spline screw shaft in the second direction in cooperation with the measurement reference member, and the second detection member is configured to detect the rotation precision of the spline screw shaft around the axis in cooperation with the measurement reference member.
[0013] In some examples, the measurement reference member has a first detection surface, the first detection surface is perpendicular to the axis; the first detection member has a first detection end, the first detection end is opposite to the first detection surface, and the first detection member is configured to detect the distance fluctuation between the first detection end and the first detection surface.
[0014] In some examples, the measurement reference member has a second detection surface, the second detection surface is parallel to the axis, and the second detection surface is configured to rotate around the axis when the spline screw shaft rotates; the second detection member has a second detection end, and the second detection member is configured to detect the circular runout of the second detection surface when the spline screw shaft rotates around the axis.
[0015] In some optional examples, the precision detection assembly further comprises a mounting bracket connected to the base, the first detection member is adjustably connected to the mounting bracket, and the second detection member is adjustably connected to the mounting bracket.
[0016] When the testing device provided in the application is used for detection, the spline screw shaft is connected to the moving plate, the first driving mechanism can drive the moving plate to move in the first direction, so as to drive the spline screw shaft on the moving plate to move in the first direction, thereby testing the movement reliability of the spline screw shaft in the first direction. The second driving mechanism can test the movement reliability of the ball spline screw in the second direction, and the third driving mechanism can test the rotation movement reliability of the ball spline screw around the axis. The testing device provided in the embodiment of the application meets the performance and service life test of the up-down movement, rotation movement and horizontal movement of the ball spline screw, and comprehensively reflects the reliability of the ball spline screw. The testing device covers the test of various movement forms of the ball spline screw, so that the comprehensiveness and accuracy of the performance test of the ball spline screw are relatively improved. BRIEF DESCRIPTION OF DRAWINGS
[0017] In order to more clearly illustrate the technical solutions of the application, the following will briefly introduce the drawings needed to be used in the embodiments. Obviously, the drawings in the following description are only some embodiments of the application, and other drawings can be obtained by those skilled in the art without creative effort on the basis of these drawings.
[0018] Figure 1 Fig. 1 is a structural schematic diagram of the testing device provided in an embodiment of the application.
[0019] Figure 2 Fig. 2 is a structural schematic diagram of the second driving mechanism and the third driving mechanism of the testing device shown in Fig. 1. Figure 1
[0020] Figure 3 Fig. 3 is a structural schematic diagram of the base of the testing device shown in Fig. 1. Figure 1
[0021] Figure 4 Fig. 4 is a structural schematic diagram of the first driving mechanism of the testing device shown in Fig. 1. Figure 1
[0022] Figure 5 Fig. 5 is a structural schematic diagram of the precision measurement assembly of the testing device shown in Fig. 1. Figure 1
[0023] 100, test device; 101, shockproof foot pad; 10, base; 12, body; 13, first mounting portion; 132, inner cavity; 134, mounting opening; 14, guide slide rail; 15, second mounting portion; 152, mounting inclined surface; 16, mounting plate; 17, mounting seat; 20, load piece; 30, moving plate; 32, plate body; 34, sliding block; 36, mounting portion; 40, limiting block; 50, first driving mechanism; 52, first rotary driving piece; 54, connecting rod transmission assembly; 541, first transmission piece; 5412, transmission belt; 5414, transmission wheel; 543, crankshaft; 545, transmission rod; 56, tensioning adjusting piece; 561, base plate; 563, slide rail; 58, encoder; 60, precision detection assembly; 61, measurement reference piece; 612, first detection surface; 614, second detection surface; 63, first detection piece; 632, first detection end; 65, second detection piece; 652, second detection end; 67, mounting bracket; 672, first mounting bracket; 674, first adjusting portion; 676, second mounting bracket; 678, second adjusting portion; 70, second driving mechanism; 72, second rotary driving piece; 74, second transmission piece; 90, third driving mechanism; 92, third rotary driving piece; 94, third transmission piece; 200, ball screw; 201, screw shaft; 203, screw nut; 205, female screw. DETAILED DESCRIPTION
[0024] In order to enable persons skilled in the art to better understand the scheme of the present application, the technical scheme in the embodiments of the present application will be clearly and completely described below in combination with the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by persons skilled in the art without creative work shall fall within the scope of protection of the present application.
[0025] As some terms are used in the description and claims to refer to certain components, those skilled in the art should understand that hardware manufacturers can use different names to refer to the same components. The description and claims do not distinguish components by name difference, but by functional difference. As mentioned throughout the description and claims, "including" is an open term, which should be interpreted as "including but not limited to"; "approximately" means that persons skilled in the art can solve technical problems within a certain error range and basically achieve technical effects.
[0026] Please refer to Figure 1The embodiment of the present application provides a test device 100, which is used for detecting the performance of a ball spline screw 200, for example, the test device 100 can be used for detecting the up-down moving precision, the rotating precision and the horizontal moving precision of the ball spline screw 200.
[0027] Please refer to Figure 2 The ball spline screw 200 is a composite unit in which the spiral raceway of the ball screw and the straight raceway of the rolling spline are designed on the same shaft and the screw mother and the spline mother are connected to the shaft. The linear and rotating movement of the shaft can be realized by the rotation or stop of the screw mother and the spline mother. In the embodiment, the ball spline screw 200 can include a spline screw shaft 201, a screw mother 203 and a spline mother 205, and the spline screw shaft 201 has an axis A. The screw mother 203 is connected to the spline screw shaft 201 through a threaded pair, the screw mother 203 and the spline mother 205 are sequentially arranged on the spline screw shaft 201, and the spline mother 205 is matched with the spline straight raceway on the spline screw shaft 201 through balls. In the application environment of the ball spline screw 200, the linear movement of the spline screw shaft 201 in the direction of the axis A can be realized by rotating the screw mother 203, and the rotating movement of the spline screw shaft 201 around the direction of the axis A can be realized by rotating the spline mother 205.
[0028] The ball spline screw 200 can be applied to a SCARA robot (assembly robot). As an example, the SCARA robot can include at least two joint arms, for example, a first joint arm and a second joint arm, the first joint arm and the second joint arm are rotatably connected, and the ball spline screw 200 is connected to one end of the second joint arm away from the first joint arm. When the SCARA robot works, the driving structure between the first joint arm and the second joint arm drives the second joint arm to rotate relative to the first joint arm, and the second joint arm drives the ball spline screw 200 to swing, so that the ball spline screw 200 has a movement in a direction perpendicular to the axial direction of the ball spline screw 200. If the ball spline screw 200 is vertically arranged during use, the movement in the direction perpendicular to the axial direction of the ball spline screw 200 is horizontal movement.
[0029] The test device 100 provided by the embodiment of the present application can test the up-down moving movement (the linear movement in the axial direction), the rotating movement and the horizontal swinging movement (the movement in the direction perpendicular to the axial direction) of the ball spline screw shaft 200. Details are described below.
[0030] Please refer to Figure 1 and Figure 2In the embodiment, the testing device 100 can include a base 10, a moving plate 30, a first driving mechanism 50, a second driving mechanism 70 and a third driving mechanism 90. In the actual application environment of the testing device 100, the base 10 can be fixed or placed on a water platform surface, the moving plate 30 is movably connected to the base 10, and the spline screw shaft 201 is connected to the moving plate 30. The first driving mechanism 50 is arranged on the base 10 and is drivingly connected to the moving plate 30, and the first driving mechanism 50 is used to drive the spline screw shaft 201 to move relative to the base 10 along a first direction X through the moving plate 30, and the first direction X intersects (for example, is perpendicular to) the direction of the axis A. The second driving mechanism 70 is arranged on the moving plate 30 and is drivingly connected to the screw nut 203, and the second driving mechanism 70 is used to drive the spline screw shaft 201 to move relative to the base 10 along a second direction Y through the screw nut 203, and the second direction Y is in the same direction as the direction of the axis A. The third driving mechanism 90 is arranged on the moving plate 30 and is drivingly connected to the spline nut 205, and the third driving mechanism 90 is used to drive the spline screw shaft 201 to rotate relative to the base 10 about the axis A through the spline nut 205.
[0031] During detection, the spline screw shaft 201 is connected to the moving plate 30, and the first driving mechanism 50 can drive the moving plate 30 to move along the first direction X, so as to drive the spline screw shaft 201 on the moving plate 30 to move along the first direction X. Wherein, the first direction X intersects the axis A, and the first driving mechanism 50 can drive the ball spline screw 200 to perform horizontal swing movement, so as to test the movement reliability of the ball spline screw 200 in the first direction X. The second driving mechanism 70 can test the movement reliability of the ball spline screw 200 in the second direction Y, and the third driving mechanism 90 can test the rotation movement reliability of the ball spline screw 200 about the axis A. The testing device 100 provided by the embodiment satisfies the performance and service life test of the up-down movement, the rotation movement and the horizontal movement of the ball spline screw 200, and comprehensively reflects the reliability of the ball spline screw 200. The testing device 100 covers the test of various movement forms of the ball spline screw 200, so that the comprehensiveness and accuracy of the performance test of the ball spline screw 200 are relatively improved.
[0032] In the present application, unless specifically defined or limited otherwise, the terms "mount", "connect", "connection", "fixed", and the like should be construed broadly. For example, it can be fixed connection, or detachable connection, or integral connection; it can be mechanical connection, or electrical connection; it can be direct connection, or indirect connection through an intermediate medium, or internal communication of two elements, or only surface contact. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.
[0033] Please refer to Figure 3In the embodiment, the base 10 is used to mount other structures of the testing device 100. In actual use scenarios, in order to ensure the stability of other structures on the base 10, the base 10 can be fixed on a water platform, or the base 10 can be a welded metal base, which also has a relatively stable state under the action of its own weight, and the bottom of the base 10 can also be provided with a shockproof structure. In the embodiment, the base 10 is a welded metal base, and the testing device 100 can also include shockproof foot pads 101, which are arranged at the bottom of the base 10. The shockproof foot pads 101 can reduce the vibration caused by other driving structures during testing, so that the base 10 remains relatively stable. The number of shockproof foot pads 101 can be set to be multiple, and the multiple shockproof foot pads 101 are connected to the bottom of the base 10 along the circumference of the base 10. The bottom of the base 10 can be provided with multiple mounting structures for mounting the shockproof foot pads 101. The multiple shockproof foot pads 101 can further improve the buffering stability effect on the one hand, and improve the stability of placing the base 10 on the other hand. The weight of the welded metal base 10 and the buffering of the shockproof foot pads 101 enable the base 10 to remain stable in the movement state of the ball screw 200, and the position does not move, thereby improving the stability of the test.
[0034] Please refer to Figure 1 , Figure 3 and Figure 4 , the moving plate 30 is slidably connected to the base 10, and the moving plate 30 is used to cooperate with the first driving mechanism 50 to realize the movement test of the ball screw 200 in the first direction X. The first direction X can be the length direction of the base 10, or the width direction of the base 10. In the embodiment, the first direction X is the length direction of the base 10. The present specification does not limit the specific connection mode between the moving plate 30 and the base 10. For example, the moving plate 30 and the base 10 can be connected by the cooperation of a sliding groove and a sliding block, or can be connected by a sliding rail structure. In the embodiment, the base 10 includes a body 12 and a guide rail 14, the guide rail 14 is fixedly connected to the body 12, and the guide rail 14 extends along the first direction X. The moving plate 30 can include a plate body 32 and a sliding block 34, the sliding block 34 is fixedly connected to one side of the plate body 32 facing the base 10, the sliding block 34 is provided with a sliding rail groove, and the sliding block 34 is sleeved on the guide rail 14 through the sliding rail groove. The moving plate 30 and the base 10 are slidably connected through the cooperation of the sliding block 34 and the guide rail 14.
[0035] To facilitate the installation of the moving plate 30 and the guide rail 14, the base 10 further comprises a mounting plate 16 which is detachably connected to the body 12, and the guide rail 14 is fixedly connected to the mounting plate 16. During installation, the moving plate 30 and other structures thereon can be first installed on the mounting plate 16 through the guide rail 14, and then the mounting plate 16 is fixed to the body 12, for example, by screws, bolts or other fasteners.
[0036] Please refer to Figure 2 and Figure 4 The ball screw 200 is connected to the moving plate 30, where the "connection" can be fixed connection, detachable connection, or integral connection; can be direct connection, indirect connection through an intermediate medium, or only surface contact. In the embodiment, the moving plate 30 can further comprise a mounting portion 36 for mounting the ball screw 200, and the mounting portion 36 is connected to the side of the plate body 32 away from the mounting plate 16. The screw shaft 201 is movably arranged in the mounting portion 36, the screw nut 203 is rotatably connected to the mounting portion 36, and the spline nut 205 is also rotatably connected to the mounting portion 36. As an example, the number of mounting portions 36 can be two, and the mounting portions 36 are arranged in the direction of the axis A, and the screw nut 203 and the spline nut 205 are arranged in the direction of the axis A and are rotatably connected to the two mounting portions 36, respectively.
[0037] Please refer to Figure 1 and Figure 4 In the embodiment, the first driving mechanism 50 can comprise a first rotary driving member 52 and a link transmission assembly 54, the first rotary driving member 52 is arranged on the base 10, and the link transmission assembly 54 is movably connected between the first rotary driving member 52 and the moving plate 30. The first rotary driving member 52 is used to drive the moving plate 30 to move along the guide rail 14 through the link transmission assembly 54. The link transmission assembly 54 and the guide rail 14 convert the rotary motion output by the first rotary driving member 52 into linear motion, realizing the swing motion test of the ball screw 200 in the first direction X.
[0038] Please refer to Figure 1 , Figure 3 and Figure 4The base 10 can further include a first mounting portion 13 and a second mounting portion 15 arranged on the body 12 along the first direction X. The body 12, the first mounting portion 13 and the second mounting portion 15 can be integrally connected or welded. The mounting plate 16 is arranged on the first mounting portion 13, and the first rotary driving member 52 is arranged on the second mounting portion 15. The specific type of the first rotary driving member 52 is not limited in the present specification. The first rotary driving member 52 can be a rotary motor, a rotary cylinder, a motor or the like driving source. In the present embodiment, the first rotary driving member 52 is a rotary motor.
[0039] In the present embodiment, the connecting rod transmission assembly 54 can include a first transmission member 541, a crankshaft 543 and a transmission rod 545. The first transmission member 541 is transmissionally connected between the crankshaft 543 and the first rotary driving member 52. The transmission rod 545 is movably connected between the moving plate 30 and the crankshaft 543. The first rotary driving member 52 is configured to drive the crankshaft 543 to rotate through the first transmission member 541. The crankshaft 543 is a rotating shaft with an eccentric portion, and is configured to convert the rotary motion into the linear reciprocating motion. The first rotary driving member 52 drives the crankshaft 543 to rotate through the first transmission member 541. The crankshaft 543 converts the rotary motion into the linear reciprocating motion through the transmission rod 545 and the guide rail 14, so that the transmission rod 545 drives the moving plate 30 to move linearly and reciprocally along the guide rail 14, thereby realizing the linear reciprocating swing motion test of the ball spline screw 200.
[0040] The specific structure of the first transmission member 541 is not limited in the present specification. For example, the first transmission member 541 can include gears, racks or the like structures matched with each other, or can include synchronous belts and synchronous pulleys matched with each other. In the present embodiment, the first transmission member 541 can include a transmission belt 5412 and a transmission pulley 5414. The transmission pulley 5414 is rotatably connected to the second mounting portion 15, and is arranged between the moving plate 30 and the first rotary driving member 52. The transmission belt 5412 is wound around the transmission pulley 5414 and the output shaft of the first rotary driving member 52. The crankshaft 543 is connected to the rotating shaft of the transmission pulley 5414. In order to improve the mounting stability of the crankshaft 543, the crankshaft 543 can be rotatably connected to the base 10. As an example, the base 10 further includes a mounting seat 17 fixedly connected to the second mounting portion 15. The transmission pulley 5414 is rotatably connected to the mounting seat 17, and the crankshaft 543 is connected between the transmission pulley 5414 and the mounting seat 17.
[0041] The first rotary driving member 52 drives the transmission pulley 5414 to rotate through the transmission belt 5412. The transmission pulley 5414 drives the crankshaft 543 to rotate. The crankshaft 543 converts the rotary motion into the linear reciprocating motion through the transmission rod 545 and the guide rail 14.
[0042] In order to improve the transmission stability of the first driving mechanism 50, in the embodiment, the first driving mechanism 50 can further comprise a tension adjusting member 56. The tension adjusting member 56 is connected between the base 10 and the first rotating driving member 52, and the tension adjusting member 56 is movably connected to the base 10. The movement of the tension adjusting member 56 relative to the base 10 can change the position of the first rotating driving member 52, so as to change the center distance between the output shaft of the first rotating driving member 52 and the rotating shaft of the crankshaft 543. The movement of the tension adjusting member 56 relative to the base 10 can change the center distance between the output shaft of the first rotating driving member 52 and the rotating shaft of the crankshaft 543, so as to adjust the tension of the transmission belt 5412 and improve the transmission stability.
[0043] Specifically, the second mounting portion 15 is provided with a mounting slope 152, and the distance from the upper surface of the mounting slope 152 to the upper surface of the body 12 decreases from the first mounting portion 13 to the second mounting portion 15. The first rotating driving member 52 is slidably connected to the mounting slope 152 through the tension adjusting member 56. As an example, the tension adjusting member 56 can comprise a base plate 561 and a sliding rail 563, the sliding rail 563 is fixedly connected to the mounting slope 152 and extends along the inclined arc of the mounting slope 152. The base plate 561 is slidably connected to the sliding rail 563, and the first rotating driving member 52 is fixedly arranged on the base plate 561. When the base plate 561 drives the first rotating driving member 52 to slide away from the crankshaft 543 along the sliding rail 563, the distance between the output shaft of the first rotating driving member 52 and the rotating shaft of the crankshaft 543 is increased, so as to tighten the transmission belt 5412 and achieve the effect of tensioning.
[0044] In the embodiment, one end of the transmission rod 545 is movably connected to the crankshaft 543, and the other end is movably connected to the moving plate 30. The moving plate 30 can be provided with a fixing block, and the end of the transmission rod 545 away from the crankshaft 543 is rotatably connected to the fixing block on the moving plate 30. When the crankshaft 543 rotates, the end of the transmission rod 545 away from the moving plate 30 performs a circular arc motion, so as to drive the other end of the transmission rod 545 to reciprocatingly push and pull the moving plate 30. Under the guiding and limiting action of the guide sliding rail 14, the reciprocating linear motion of the ball screw 200 on the moving plate 30 is realized.
[0045] The first driving mechanism 50 can further comprise an encoder 58, and the encoder 58 is connected to the rotating shaft of the crankshaft 543. The encoder 58 is used for monitoring the rotating speed of the crankshaft 543. The encoder 58 can convert mechanical motion into electrical signals or digital signals, and feedback the angle information of the crankshaft 543, so as to help the first rotating driving member 52 control the speed and ensure the accurate operation of the test process.
[0046] Please refer to Figure 2 and Figure 4In the embodiment, the second driving mechanism 70 is configured to drive the ball screw shaft 201 to move linearly along the second direction Y. In the embodiment, the second direction Y is the height direction of the base 10, and the second direction Y is substantially perpendicular to the first direction X. Since the base 10 is placed on the water surface in the application scenario, the second direction Y is the vertical direction in the embodiment. The second driving mechanism 70 can include a second rotating driving member 72 and a second transmission member 74. The second rotating driving member 72 is fixedly connected to the moving plate 30, and the second transmission member 74 is transmissionally connected between the ball screw nut 203 and the second rotating driving member 72. The second rotating driving member 72 drives the ball screw nut 203 to rotate relative to the moving plate 30 through the second transmission member 74. The ball screw nut 203 cannot move linearly under the limitation of the moving plate 30, so as to drive the ball screw shaft 201 to move relative to the moving plate 30 along the second direction Y, and realize the linear motion test of the ball screw 200 in the up-down direction.
[0047] The specific type of the second rotating driving member 72 is not limited in the specification. For example, the second rotating driving member 72 can be a driving source such as a rotating motor, a rotating cylinder, a motor, etc. In the embodiment, the second rotating driving member 72 is a rotating motor. The second rotating driving member 72 is arranged on the side of the plate body 32 away from the guide rail 14. As an example, a protruding mounting plate can be further arranged on the plate body 32 for mounting the second rotating driving member 72. The specific structure of the second transmission member 74 is not limited in the specification. For example, the second transmission member 74 can include structures such as gears, racks, etc. that cooperate with each other, or can include synchronous belts and synchronous belt pulleys that cooperate with each other. In the embodiment, the second transmission member 74 includes an input synchronous belt pulley, a synchronous belt, and an output synchronous belt pulley. The input synchronous belt pulley is connected to the output end of the second rotating driving member 72, the output synchronous belt pulley is fixedly connected to the ball screw nut 203, and the synchronous belt is arranged around the input synchronous belt pulley and the output synchronous belt pulley.
[0048] In the embodiment, the third driving mechanism 90 is configured to drive the ball screw shaft 201 to rotate around the axis A. The third driving mechanism 90 can include a third rotating driving member 92 and a third transmission member 94. The third rotating driving member 92 is fixedly connected to the moving plate 30, and the third transmission member 94 is transmissionally connected between the ball screw nut 205 and the third rotating driving member 92. The third rotating driving member 92 drives the ball screw nut 205 to rotate relative to the moving plate 30 through the third transmission member 94. The ball screw nut 205 drives the ball screw shaft 201 to rotate around the axis A through the ball and straight rolling way between the ball screw nut 205 and the ball screw shaft 201, and realizes the rotation test of the ball screw 200.
[0049] The specific type of the third rotary driving member 92 is not limited in the present specification. For example, the third rotary driving member 92 can be a rotary motor, a rotary cylinder, a motor, or the like. In the present embodiment, the third rotary driving member 92 is a rotary motor. The third rotary driving member 92 is arranged on the side of the plate body 32 away from the guide rail 14. As an example, a protruding mounting plate can be arranged on the plate body 32 for mounting the third rotary driving member 92. The third transmission member 94 and the second transmission member 74 are arranged in the direction of the axis A. The specific structure of the third transmission member 94 is not limited in the present specification. For example, the third transmission member 94 can include gears, a rack, or the like. Alternatively, the third transmission member 94 can include a synchronous belt and a synchronous pulley. In the present embodiment, the third transmission member 94 includes an input synchronous pulley, a synchronous belt, and an output synchronous pulley. The input synchronous pulley is connected to the output end of the third rotary driving member 92. The output synchronous pulley is fixedly connected to the spline female 205. The synchronous belt is arranged around the input synchronous pulley and the output synchronous pulley.
[0050] In the present embodiment, the test device 100 can further include a plurality of load members 20. At least one of the plurality of load members 20 is arranged to be detachably connected to one end of the spline screw shaft 201. The plurality of load members 20 have different mass distributions. By selecting load members 20 with different weights or mass distributions and connecting them to the spline screw shaft 201, different weights and moments of inertia can be obtained to simulate different load conditions and use scenarios, thereby verifying the reliability of the ball spline screw 200 under different loads.
[0051] As an example, the load member 20 is detachably connected to the bottom end of the spline screw shaft 201. For example, the load member 20 can be connected to the bottom end of the spline screw shaft 201 by means of screws, bolts, or the like. In order to prevent the spline screw shaft 201 from falling during movement under the weight of the load member 20, the test device 100 can further include a limiting block 40 in the present embodiment. The limiting block 40 is connected to the end (top end) of the spline screw shaft 201 away from the load member 20 and protrudes relative to the peripheral wall of the spline screw shaft 201. The limiting block 40 improves the stability of the ball spline screw 200 during testing.
[0052] Please refer to Figure 2 and Figure 5In the embodiment, the testing device 100 can further include a precision detection assembly 60, which can include a measurement reference 61, a first detection member 63, and a second detection member 65. The measurement reference 61 is connected to one end of the spline screw shaft 201. The first detection member 63 and the second detection member 65 are both connected to the base 10. The first detection member 63 is configured to detect the movement precision of the spline screw shaft 201 in the second direction Y in cooperation with the measurement reference 61. The second detection member 65 is configured to detect the rotation precision of the spline screw shaft 201 around the axis A in cooperation with the measurement reference 61. The first detection member 63 and the second detection member 65 are respectively configured to detect the linear movement precision and the rotation movement precision of the ball spline 200 in cooperation with the measurement reference 61, so as to determine the performance change of the ball spline 200 in the continuous working state.
[0053] The measurement reference 61 can be connected to the top end of the spline screw shaft 201 or the bottom end of the spline screw shaft 201. In the embodiment, the measurement reference 61 is connected to the bottom end of the load 20. The measurement reference 61 is substantially plate-shaped. The measurement reference 61 can have a first detection surface 612, which is perpendicular to the axis A. The first detection surface 612 can be the upper surface of the measurement reference 61 or the lower surface of the measurement reference 61. In order to facilitate the installation of the first detection member 63, the first detection surface 612 is the lower surface of the measurement reference 61. The first detection member 63 has a first detection end 632. The first detection member 63 is arranged below the first detection surface 612. The first detection end 632 is opposite to the first detection surface 612. The first detection member 63 is configured to detect the distance fluctuation between the first detection end 632 and the first detection surface 612. When the second driving mechanism 70 drives the spline screw shaft 201 to move in the second direction Y, the first detection surface 612 moves with the spline screw shaft 201 in the second direction Y, and the distance between the first detection surface 612 and the first detection end 632 changes. The performance change of the ball spline 200 in the up-down linear movement process can be determined according to the distance fluctuation measured by the first detection member 63.
[0054] The measurement reference 61 can further have a second detection surface 614, which is parallel to the axis A. As an example, the measurement reference 61 is provided with a notch, and the second detection surface 614 is the inner wall of one side of the notch. The second detection member 65 has a second detection end 652. When the spline screw shaft 201 rotates around the axis A, the second detection surface 614 also rotates around the axis A. The second detection member 65 is configured to detect the circular runout of the second detection surface 614. The performance change of the ball spline 200 in the rotation movement process can be determined according to the measurement result of the second detection member 65. In some embodiments, the number of the second detection surfaces 614 can be multiple. The multiple second detection surfaces 614 can be uniformly distributed on the measurement reference 61 in the circumferential direction.
[0055] The present specification does not limit the specific structure of the first detection member 63 and the second detection member 65. For example, the first detection member 63 can be an ultrasonic sensor, a laser sensor, an infrared sensor, etc., and the second detection member 65 can also be an ultrasonic sensor, a laser sensor, an infrared sensor, a displacement sensor, etc. In the present embodiment, the first detection member 63 and the second detection member 65 are both laser measurement probes, and the first detection end 632 and the second detection end 652 are respectively the laser emission ends of the first detection member 63 and the second detection member 65.
[0056] Please refer to Figure 2 , Figure 3 and Figure 5 , the first mounting portion 13 has an inner cavity 132, and the first mounting portion 13 can be provided with a mounting port 134 for mounting the first detection member 63 and the second detection member 65, and the mounting port 134 communicates the inner cavity 132 with the outside. In order to facilitate the installation of the first detection member 63 and the second detection member 65, in the present embodiment, the precision detection assembly 60 can further include a mounting bracket 67, and the first detection member 63 and the second detection member 65 are adjustably arranged on the mounting bracket 67.
[0057] The mounting bracket 67 can include a first mounting frame 672 and a first adjusting portion 674. The first mounting frame 672 is connected to the first mounting portion 13 (for example, by bolt connection), and is arranged at the mounting port 134. The first mounting frame 672 is arranged to extend along the width direction of the base 10. One end of the first adjusting portion 674 can be slidably connected to the first mounting frame 672, and the other end is located in the inner cavity 132. The first adjusting portion 674 is arranged to extend along the second direction Y. The first adjusting portion 674 can slide relative to the first mounting frame 672 along the width direction of the base 10. The first detection member 63 can be slidably connected to the first adjusting portion 674, and the first detection member 63 can slide relative to the first adjusting portion 674 along the second direction Y. The first detection member 63 can be adjusted in position along the second direction Y and the width direction of the base 10 through the first adjusting portion 674 and the first mounting frame 672, which improves the flexibility and detection accuracy of the first detection member 63.
[0058] The mounting bracket 67 can further include a second mounting frame 676 and a second adjusting part 678. The second mounting frame 676 is connected to the first mounting part 13. The second mounting frame 676 extends along the first direction X. One end of the second adjusting part 678 is slidably connected to the second mounting frame 676, and the other end extends above the first mounting part 13. The second adjusting part 678 extends along the second direction Y. The second adjusting part 678 can slide along the first direction X relative to the second mounting frame 676. The second detecting part 65 is slidably connected to the second adjusting part 678, and the second detecting part 65 can slide along the second direction Y relative to the second adjusting part 678. The first detecting part 63 can be adjusted in position along the second direction Y and the first direction X through the second adjusting part 678 and the second mounting frame 676, thereby improving the flexibility and detection accuracy of the second detecting part 65.
[0059] When the testing device 100 detects, the spline screw shaft 201 is connected to the moving plate 30, and the first driving mechanism 50 can drive the moving plate 30 to move along the first direction X, so as to drive the spline screw shaft 201 on the moving plate 30 to move along the first direction X, thereby testing the motion reliability of the spline screw shaft 201 in the first direction X. The second driving mechanism 70 can test the motion reliability of the ball spline screw 200 in the second direction Y, and the third driving mechanism 90 can test the rotation motion reliability of the ball spline screw 200 around the axis A. The testing device 100 provided by the embodiment of the application meets the performance and service life test of the up-down motion, rotation motion and horizontal motion of the ball spline screw 200, and comprehensively reflects the reliability of the ball spline screw 200. The testing device 100 covers the test of various motion forms of the ball spline screw 200, so that the comprehensiveness and accuracy of the performance test of the ball spline screw 200 are relatively improved.
[0060] In the description of the present specification, the description of the terms "one embodiment", "some embodiments", "an example", "a specific example", or "some examples" and the like means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the present specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any appropriate manner in any one or more embodiments or examples. In addition, the different embodiments or examples described in the present specification and the features of the different embodiments or examples can be combined and combined by those skilled in the art without contradiction.
[0061] It should be pointed out finally that the above embodiments are only used to illustrate the technical solutions of the present application, but not to limit them. Although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that the technical solutions recorded in the foregoing embodiments can still be modified, or some technical features therein can be replaced equivalently. Such modifications or replacements do not drive the essence of the corresponding technical solutions out of the spirit and scope of the technical solutions of the embodiments of the present application.
Claims
1. A test device, characterized by A testing device for detecting the performance of a ball spline, the ball spline comprising a spline shaft, a screw nut and a spline nut which are sequentially sleeved on the spline shaft, the spline shaft having an axis, the testing device comprising: a base; a moving plate movably connected to the base, the ball spline being connected to the moving plate; a first driving mechanism arranged on the base and drivingly connected to the moving plate, the first driving mechanism being used for driving the spline shaft to move relative to the base along a first direction through the moving plate, the first direction intersecting the axis; a second driving mechanism arranged on the moving plate and drivingly connected to the screw nut, the second driving mechanism being used for driving the ball spline to move relative to the base along a second direction through the screw nut, the second direction being in the same direction as the axis; and a third driving mechanism arranged on the moving plate and drivingly connected to the spline nut, the third driving mechanism being used for driving the spline shaft to rotate relative to the base about the axis through the spline nut.
2. The test device of claim 1, wherein, The base is provided with a guide slide rail extending along the first direction, the moving plate being slidably connected to the base through the guide slide rail; the first driving mechanism comprises a first rotary driving member and a connecting rod transmission assembly, the first rotary driving member being arranged on the base, the connecting rod transmission assembly being movably connected between the first rotary driving member and the moving plate, the first rotary driving member being used for driving the moving plate to move along the guide slide rail through the connecting rod transmission assembly.
3. The test device of claim 2, wherein, The connecting rod transmission assembly comprises a first transmission member, a crankshaft and a transmission rod, the first transmission member being drivingly connected between the crankshaft and the first rotary driving member, the transmission rod being movably connected between the moving plate and the crankshaft; the first rotary driving member is used for driving the crankshaft to rotate through the first transmission member.
4. The test device of claim 3, wherein, The first driving mechanism further comprises an encoder connected to the rotating shaft of the crankshaft, the encoder being used for monitoring the rotating speed of the crankshaft.
5. The test device of claim 3, wherein, The first transmission member comprises a transmission belt, the first driving mechanism further comprising a tensioning adjusting member connected between the base and the first rotary driving member, the tensioning adjusting member being movably connected to the base, the tensioning adjusting member being movable relative to the base to change the position of the first rotary driving member so as to change the center distance between the output shaft of the first rotary driving member and the rotating shaft of the crankshaft.
6. The test device of claim 1, wherein, The second driving mechanism comprises a second rotary driving member and a second transmission member, the second rotary driving member being fixedly connected to the moving plate, the second transmission member being drivingly connected between the screw nut and the second rotary driving member; the third driving mechanism comprises a third rotary driving member and a third transmission member, the third rotary driving member being fixedly connected to the moving plate, the third transmission member being drivingly connected between the spline nut and the third rotary driving member.
7. The test device of claim 1, wherein, The testing device further comprises a plurality of load members, at least one of the plurality of load members is detachably connected to one end of the spline screw shaft, and the plurality of load members have different mass distributions.
8. The test device of any one of claims 1 to 7, wherein, The testing device further comprises a precision detection assembly, the precision detection assembly comprises a measurement reference member, a first detection member and a second detection member, the measurement reference member is connected to one end of the spline screw shaft, the first detection member and the second detection member are both connected to the base, the first detection member is used to detect the movement precision of the spline screw shaft in the second direction in cooperation with the measurement reference member, and the second detection member is used to detect the rotation precision of the spline screw shaft around the axis in cooperation with the measurement reference member.
9. The test device of claim 8, wherein, The measurement reference member has a first detection surface which is perpendicular to the axis, and the first detection member has a first detection end which is opposite to the first detection surface, and the first detection member is used to detect the distance fluctuation between the first detection end and the first detection surface.
10. The test device of claim 8, wherein, The measurement reference member has a second detection surface which is parallel to the axis, and the spline screw shaft drives the second detection surface to rotate around the axis when the spline screw shaft rotates, and the second detection member has a second detection end, and the second detection member is used to detect the circle runout of the second detection surface when the spline screw shaft rotates around the axis.
11. The test device of claim 8, wherein, The precision detection assembly further comprises a mounting bracket which is connected to the base, the first detection member is adjustably connected to the mounting bracket, and the second detection member is adjustably connected to the mounting bracket.