Dynamic torque testing device for ball screw pair

Abstract

The invention discloses a dynamic torque testing device for a ball screw pair, which relates to the technical field of screw torque detection and comprises a base, a driving mechanism, a torque sensor and a linear motion mechanism. The driving mechanism is arranged on the driving mechanism and used for being connected with a ball screw in the ball screw pair and driving the ball screw to rotate. The input end of the torque sensor is connected with the input end of the driving mechanism, and the output end of the torque sensor is connected with the output end of the driving mechanism; the linear motion mechanism is arranged on the base and used for being connected with a ball nut in the ball screw pair and enabling the ball nut to move in the axial direction of a ball screw. In the rotation process of the screw rod, the linear motion mechanism is connected with the ball nut to enable the ball nut to generate linear motion, so that the linear motion mechanism is driven by the ball nut to do linear motion, namely, the linear motion mechanism moves along with the ball nut to realize dynamic detection, and at the moment, the detection data of the torque sensor on the ball screw rod is more accurate.

Description

Technical Field

[0001] The invention relates to the technical field of screw torque detection, in particular to a ball screw pair dynamic torque testing device. Background Art

[0002] The ball screw pair is a spiral transmission element with steel balls as rolling bodies between the ball screw and the ball nut. It can convert rotary motion into linear motion, or convert linear motion into rotary motion.

[0003] The ball screw in the ball screw pair is usually driven by a motor. Since the ball nut is fixed and cannot rotate but can only move axially, the ball screw pair needs to be tested for torque without external load after production and processing, so as to measure the torque required for relative continuous rotation of the ball screw and ball nut.

[0004] The existing ball screw pair torque test device is usually used for fixing the ball nut. The structure cannot move with the ball nut, the detected data is not accurate enough, and the detection effect is not good. Summary of the invention

[0005] The invention discloses a ball screw pair dynamic torque testing device to solve the technical problem.

[0006] In order to solve the above technical problems, the present invention proposes the following optimization technical solutions: A ball screw pair dynamic torque testing device, comprising: Pedestal; A driving mechanism, arranged on the driving mechanism, for connecting the ball screw in the ball screw pair and driving the ball screw to rotate; a torque sensor, wherein an input end of the torque sensor is connected to an input end of the driving mechanism, and an output end of the torque sensor is connected to an output end of the driving mechanism; The linear motion mechanism is arranged on the base and is used for connecting the ball nut in the ball screw pair and making the ball nut move along the axial direction of the ball screw.

[0007] Furthermore, the driving mechanism includes a rotating driving member and a screw connecting member, the rotating driving member is arranged on the base and connected to the input end of the torque sensor, one end of the screw connecting member is connected to the output end of the torque sensor and the other end is used to connect to the ball screw.

[0008] Furthermore, the driving mechanism further comprises a bracket, the bracket is arranged on the base, and the rotary driving member and the screw connecting member are both arranged on the bracket.

[0009] Furthermore, the screw rod connecting part includes a tool rod, a chuck, a locking nut, a spacer washer and a nut. One end of the tool rod is connected to the output end of the torque sensor through a coupling. The locking nuts are all sleeved on the tool rod. The internal thread of the locking nut is engaged with the external thread of the tool rod. One end of the chuck is connected to the other end of the tool rod. The spacer washer is sleeved on the tool rod and the chuck. The nut is sleeved on the other end of the chuck and its internal thread is engaged with the external thread of the spacer washer.

[0010] Furthermore, the linear motion mechanism includes a moving component and a connecting component, wherein the moving component is arranged on the base and is used for the connecting component to move linearly thereon, and the connecting component is arranged on the moving component and is used for the ball screw to pass through it and connect to the ball nut.

[0011] Furthermore, the moving assembly includes two slide rails and two slide seats, the slide rails are arranged on the base, the two slide seats are respectively mounted on the two slide rails, and the slide seats are connected to the connecting assembly.

[0012] Furthermore, the connecting component includes a first mounting seat and a mounting plate, the first mounting seat is arranged on the moving component, the mounting plate is arranged on the first mounting seat, the first mounting seat and the mounting plate are both provided with holes for the ball screw to pass through, and the mounting plate is used to connect the ball nut.

[0013] Furthermore, it also includes an auxiliary mechanism, which is movably arranged on the linear motion mechanism.

[0014] Furthermore, the auxiliary mechanism includes a second mounting seat and a tail top, the second mounting seat is arranged on the linear motion mechanism, the tail top is arranged on the second mounting seat, and the tail top is used to support the ball screw.

[0015] Furthermore, the tail top is provided with a hand wheel.

[0016] Compared with the prior art, the present invention has the following beneficial effects: The ball screw pair dynamic torque testing device provided by the present invention adopts a driving mechanism to drive the ball screw to rotate, and adopts a torque sensor to detect the torque of the ball screw. During the rotation of the screw, the linear motion mechanism is connected to the ball nut to make the ball nut produce linear motion. Therefore, the linear motion mechanism is driven by the ball nut to perform linear motion, that is, the linear motion mechanism follows the movement of the ball nut to realize dynamic detection. At this time, the torque sensor has more accurate detection data for the ball screw. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural schematic diagram of the present invention.

[0018] Figure 2 It is a top view of the present invention.

[0019] Figure 3 It is a structural explosion diagram of the present invention.

[0020] Figure 4 It is a structural cross-sectional view of the present invention.

[0021] Figure 5 yes Figure 4 Enlarged view of point A.

[0022] In the figure: 100, base; 200, driving mechanism; 210, rotating driving member; 220, screw connecting member; 221, tool rod; 222, chuck; 223, locking nut; 224, spacer washer; 225, nut; 230, bracket; 240, support table; 250, coupling; 260, bearing; 300, torque sensor; 400, linear motion mechanism; 410, moving assembly; 411, slide rail; 412, slide seat; 420, connecting assembly; 421, first mounting seat; 422, mounting plate; 500, auxiliary mechanism; 510, second mounting seat; 520, tail top; 521, handwheel. DETAILED DESCRIPTION

[0023] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.

[0024] See also Figure 1-Figure 5 A ball screw pair dynamic torque testing device comprises a base 100, a driving mechanism 200, a torque sensor 300 and a linear motion mechanism 400; the driving mechanism 200 is arranged on the driving mechanism 200, and is used to connect the ball screw in the ball screw pair and drive the ball screw to rotate; the input end of the torque sensor 300 is connected to the input end of the driving mechanism 200, and the output end of the torque sensor 300 is connected to the output end of the driving mechanism 200; the linear motion mechanism 400 is arranged on the base 100, and is used to connect the ball nut in the ball screw pair and make the ball nut move along the axial direction of the ball screw.

[0025] When in use, the ball screw pair is installed on the driving mechanism 200 and the linear motion mechanism 400, specifically, one end of the ball screw is connected to the driving mechanism 200, and the ball nut is connected to the linear motion mechanism 400. The driving mechanism 200 is started to drive the ball screw to rotate. Since the ball nut is connected to the linear motion mechanism 400, the ball nut does not rotate and moves along the axial direction of the ball screw through the linear motion mechanism 400. The torque sensor 300 connected to the driving mechanism 200 can detect the torque parameters of the ball screw when there is no external load. The control system can draw a torque measurement curve based on the real-time detection data of the torque sensor 300, that is, it can detect the torque data of the ball screw when the ball nut moves dynamically and the ball screw rotates dynamically, so that the torque data graph of the ball screw can be observed more directly.

[0026] In this embodiment, the driving mechanism 200 includes a rotating driving member 210 and a screw connecting member 220. The rotating driving member 210 is arranged on the base 100 and connected to the input end of the torque sensor 300. One end of the screw connecting member 220 is connected to the output end of the torque sensor 300 and the other end is used to connect the ball screw.

[0027] In addition, the rotating driving member 210 is a motor, specifically, the output shaft of the motor is connected to the input shaft of the torque sensor 300 through the coupling 250, the output shaft of the torque sensor 300 is connected to the screw connector 220, and the screw connector 220 is connected to one end of the ball screw. Therefore, when the rotating driving member 210 is driven, the torque sensor 300 drives the ball screw to rotate by driving the screw connector 220 according to the driving force of the rotating driving member 210, so that the torque sensor 300 can detect the torque force of the ball screw.

[0028] In this embodiment, the driving mechanism 200 further includes a bracket 230, which is disposed on the base 100, and the rotary drive member 210 and the screw connecting member 220 are both disposed on the bracket 230. The bracket 230 is used to support the rotary drive member 210 so that the rotary drive member 210 can be adapted to the driving mechanism 200 in height.

[0029] In addition, the driving mechanism 200 further includes a support platform 240 , which is disposed on the bracket 230 . The torque sensor 300 is disposed on the support platform 240 . The support platform 240 serves to support the torque sensor 300 .

[0030] In this embodiment, the screw connector 220 includes a tool rod 221, a chuck 222, a locking nut 223, a spacer washer 224 and a nut 225. One end of the tool rod 221 is connected to the output end of the torque sensor 300 through a coupling 250. The locking nuts 225 are all sleeved on the tool rod 221. The internal thread of the locking nut 225 is engaged with the external thread of the tool rod 221. One end of the chuck 222 is connected to the other end of the tool rod 221. The spacer washer 224 is sleeved on the tool rod 221 and the chuck 222. The spacer washer 224 is inserted into the bracket 230 through a bearing 260. The bracket 230 supports the screw connector 220. The nut 225 is sleeved on the other end of the chuck 222 and its internal thread is engaged with the external thread of the spacer washer 224.

[0031] As a supplementary explanation, the chuck 222 is a collet structure with multiple gaps evenly spaced circumferentially, and one end of the ball screw is inserted into the chuck 222. The chuck 222 has a clamping effect on the ball screw, and when the nut 225 is tightened on the spacer washer 224, it also covers the end of the chuck 222, that is, the nut 225 also has a tightening effect on the chuck 222, further enabling the chuck 222 to clamp the ball screw.

[0032] In this embodiment, the linear motion mechanism 400 includes a moving component 410 and a connecting component 420. The moving component 410 is arranged on the base 100, and is used for the connecting component 420 to move linearly thereon. The connecting component 420 is arranged on the moving component 410, and is used for the ball screw to pass through it and connect the ball nut. The connecting component 420 is connected to the ball nut. When the ball screw rotates, the ball nut drives the connecting component 420 to perform linear motion on the moving component 410.

[0033] In this embodiment, the moving component 410 includes two slide rails 411 and two slide seats 412. The slide rails 411 are arranged on the base 100. The two slide seats 412 are respectively installed on the two slide rails 411. The slide seat 412 is connected to the connecting component 420, so that the ball nut drives the connecting component 420 to move on the two slide rails 411.

[0034] In this embodiment, the connecting assembly 420 includes a first mounting seat 421 and a mounting plate 422. The first mounting seat 421 is arranged on the moving assembly 410, and the mounting plate 422 is arranged on the first mounting seat 421. Both the first mounting seat 421 and the mounting plate 422 are provided with holes for the ball screw to pass through, and the mounting plate 422 is used to connect the ball nut. Specifically, the ball screw passes through the holes of the first mounting seat 421 and the mounting plate 422, that is, it plays a role of supporting the other end of the ball screw, and the ball nut is connected to the mounting plate 422 by bolts or other structures.

[0035] In this embodiment, an auxiliary mechanism 500 is further included, and the auxiliary mechanism 500 is movably disposed on the linear motion mechanism 400. When the length of the ball screw is too long, one end of the ball screw is connected to the driving mechanism 200, and the other end passes through the connecting assembly 420 and is abutted by the auxiliary mechanism 500, so that the ball screw is in a horizontal state.

[0036] In this embodiment, the auxiliary mechanism 500 includes a second mounting seat 510 and a tail top 520. The second mounting seat 510 is arranged on the linear motion mechanism 400, and the tail top 520 is arranged on the second mounting seat 510. The tail top 520 is used to support the ball screw. Specifically, the second mounting seat 510 is assembled on the slide rail 411 through the slide seat 412. Manually pushing the second mounting seat 510 can move the tail top 520 to move to a position just supporting the ball screw.

[0037] In this embodiment, the tail top 520 is provided with a hand wheel 521. The tail top 520 is movably connected to the second mounting seat 510. Specifically, the tail top 520 just passes through the second mounting seat 510 with a certain degree of tightness, and pushing the hand wheel 521 can move the tail top 520 to press against the ball screw, or the tail top 520 is screwed to the second mounting seat 510 through the outer wall thread, and the hand wheel 521 is turned to rotate close to the ball screw, thereby pressing against the ball screw.

[0038] The foregoing is merely a specific embodiment of the present invention, which enables those skilled in the art to understand or implement the present invention. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features claimed herein.

Claims

1. A ball screw pair dynamic torque test device, characterized in that: include: Pedestal; A driving mechanism, arranged on the driving mechanism, for connecting the ball screw in the ball screw pair and driving the ball screw to rotate; a torque sensor, wherein an input end of the torque sensor is connected to an input end of the driving mechanism, and an output end of the torque sensor is connected to an output end of the driving mechanism; The linear motion mechanism is arranged on the base and is used for connecting the ball nut in the ball screw pair and making the ball nut move along the axial direction of the ball screw.

2. A ball screw pair dynamic torque testing device according to claim 1, characterized in that: The driving mechanism includes a rotating driving member and a screw connecting member, wherein the rotating driving member is arranged on the base and connected to the input end of the torque sensor, one end of the screw connecting member is connected to the output end of the torque sensor and the other end is used to connect to the ball screw.

3. A ball screw pair dynamic torque testing device according to claim 2, characterized in that: The driving mechanism further comprises a bracket, which is arranged on the base, and the rotary driving member and the screw connecting member are both arranged on the bracket.

4. A ball screw pair dynamic torque testing device according to claim 2, characterized in that: The screw rod connecting part includes a tool rod, a chuck, a locking nut, a spacer washer and a nut. One end of the tool rod is connected to the output end of the torque sensor through a coupling. The locking nuts are all sleeved on the tool rod. The internal thread of the locking nut is meshed with the external thread of the tool rod. One end of the chuck is connected to the other end of the tool rod. The spacer washer is sleeved on the tool rod and the chuck. The nut is sleeved on the other end of the chuck and its internal thread is meshed with the external thread of the spacer washer.

5. A ball screw pair dynamic torque testing device according to claim 1, characterized in that: The linear motion mechanism includes a moving component and a connecting component. The moving component is arranged on the base and is used for the connecting component to move linearly thereon. The connecting component is arranged on the moving component and is used for the ball screw to pass through it and connect to the ball nut.

6. A ball screw pair dynamic torque testing device according to claim 5, characterized in that: The moving assembly comprises two slide rails and two slide seats. The slide rails are arranged on the base. The two slide seats are respectively mounted on the two slide rails in a cooperative manner. The slide seats are connected to the connecting assembly.

7. A ball screw pair dynamic torque testing device according to claim 5, characterized in that: The connecting component includes a first mounting seat and a mounting plate, the first mounting seat is arranged on the moving component, the mounting plate is arranged on the first mounting seat, the first mounting seat and the mounting plate are both provided with holes for the ball screw to pass through, and the mounting plate is used to connect the ball nut.

8. The ball screw pair dynamic torque testing device according to claim 1, characterized in that: It also includes an auxiliary mechanism, which is movably arranged on the linear motion mechanism.

9. A ball screw pair dynamic torque testing device according to claim 8, characterized in that: The auxiliary mechanism includes a second mounting seat and a tail top, wherein the second mounting seat is arranged on the linear motion mechanism, and the tail top is arranged on the second mounting seat, and the tail top is used to support the ball screw.

10. A ball screw pair dynamic torque testing device according to claim 9, characterized in that: The tail top is provided with a hand wheel.

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