Multi-station bidirectional loading shaft sleeve test bench

Abstract

A multi-station bidirectional loading shaft sleeve test bench disclosed by the present invention comprises a rack and a plurality of test stations, each test station comprises a rotating sleeve, a test shaft, a test seat and a radial weight, the rotating sleeve is horizontally and rotatably connected to the rack, one end of the test shaft is axially and slidably connected in the rotating sleeve and is circumferentially fixed, and the other end of the test shaft is axially and rotatably connected to the rack. The other end of the testing shaft is in clearance fit with a to-be-tested shaft sleeve, the testing seat is of an annular structure of which the inner wall can be tightly matched with the periphery of the to-be-tested shaft sleeve, and the radial weight is hung on the lower side of the testing seat; the test station further comprises a friction piece, a traction rope, an axial weight and a reversing mechanism, the friction piece is locked at the outer end of the test shaft, the traction rope is reversed through the reversing mechanism, one end of the traction rope is axially connected with the test shaft, the other end is vertically connected with the axial weight, and the friction piece extrudes the end face of the shaft sleeve to be tested; the test station further comprises a power mechanism. The invention provides a multi-station bidirectional loading shaft sleeve test bench, which improves the test efficiency and the test accuracy.

Description

Technical Field

[0001] The invention relates to the technical field of shaft sleeve testing, and in particular to a multi-station bidirectional loading shaft sleeve testing bench. Background Art

[0002] Bushings, such as automobile flange bushings, often need to be subjected to radial and axial loads to test the wear resistance of the flange surface and inner wall. Existing testing equipment, such as the patent with application number CN2013100211135, includes a motor, a spindle, a mounting seat, a radial loading spring, and an axial loading spring. During the test, the bushing is placed in the mounting seat, and the mounting seat with the bushing is placed on the spindle. The motor drives the spindle to rotate, and the radial loading spring and the axial loading spring respectively apply axial and radial loads to the bearing to test the wear resistance of the flange surface and inner wall of the bushing.

[0003] The existing testing equipment has the following defects: first, there is only one testing station and only one sleeve can be tested at a time, which leads to low testing efficiency; second, after the elasticity of the radial loading spring and the axial loading spring decreases, the loaded load is low, thereby increasing the testing error. Summary of the invention

[0004] In order to solve the shortcomings of low test efficiency of existing test equipment and the test load being easily low and increasing the test error, the present invention proposes a multi-station bidirectional loading shaft sleeve test bench to improve the test efficiency and test accuracy.

[0005] To achieve the above object, the present invention adopts the following technical solution: A multi-station bidirectional loading sleeve test bench comprises: a frame and multiple test stations, wherein the test stations comprise a rotating sleeve, a test shaft, a test seat and a radial weight, wherein the rotating sleeve is horizontally rotatably connected to the frame, one end of the test shaft is axially slidably connected in the rotating sleeve and circumferentially fixed, and the other end of the test shaft is used for clearance fit or interference fit with the sleeve to be tested, the test seat is an annular structure whose inner wall can be tightly fitted with the outer periphery of the sleeve to be tested, and the radial weight is hung on the lower side of the test seat; the test station also comprises: a friction member, a traction rope, an axial weight and a reversing mechanism, wherein the friction member is locked at the outer end of the test shaft, the traction rope is reversed through the reversing mechanism, one end of the traction rope is axially connected to the test shaft, and the other end is vertically connected to the axial weight, and the friction member squeezes the end face of the sleeve to be tested; the test station also comprises: a power mechanism; the power mechanism drives the rotating sleeves of multiple test stations to rotate synchronously.

[0006] Through the above settings, first, multiple test stations are set up, and each station can independently perform sleeve tests, which means that multiple sleeves can be tested at the same time, greatly improving the sleeve test efficiency. Second, by using radial weights and axial weights instead of traditional spring loading methods, the problem of loading force changes caused by spring aging can be effectively avoided. The test load is applied by axial weights and radial weights, and the test load is more stable and accurate, improving the accuracy of the test. Third, the clearance fit or interference fit design between the test shaft and the sleeve to be tested, as well as the tight fit design between the test seat and the outer periphery of the sleeve to be tested, enable the test bench to adapt to the testing requirements of sleeves to be tested of different sizes and specifications, increasing the application range of the equipment.

[0007] Furthermore, multiple test stations are arranged along the front-to-back direction on both sides of the frame, and the power mechanism includes multiple swing arms and two moving beams. The two moving beams extend along the front-to-back direction and are respectively arranged above the test stations on the left and right sides. Swing arms are installed on the rotating sleeves of the test stations. The swing arms on the left are parallel to each other and hinged to the moving beam on the left, and the swing arms on the right are parallel to each other and hinged to the moving beam on the right. The power mechanism also includes a push-pull device for driving the moving beam to move forward and backward.

[0008] Through the above arrangement, the push-pull device drives the rotating sleeve to reciprocate through the moving beam and the swing arm.

[0009] Furthermore, the push-pull device includes a connecting shaft and a first linear drive, the two moving beams are fixedly connected through the connecting shaft, one end of the first linear drive is hinged to the frame, and the other end of the first linear drive is hinged to the connecting shaft.

[0010] Through the above arrangement, the first linear drive drives the two moving beams to move synchronously through the connecting shaft, so that the swing arms of the left and right test stations can move synchronously.

[0011] Furthermore, the test station also includes a support seat and a bearing. The support seat is installed on the frame. The rotating sleeve passes through the support seat and is rotatably connected to the support seat. The bearing is installed between the support seat and the rotating sleeve.

[0012] Through the above arrangement, the rotating sleeve can rotate stably and the rotation resistance of the rotating sleeve can be reduced.

[0013] Furthermore, a first thrust bearing is provided between the rotating sleeve and the test seat, a limiting groove is provided axially on the inner side of the rotating sleeve, a fixing key adapted to the limiting groove is fixedly connected to the side of the test shaft, and the fixing key is slidably connected in the limiting groove.

[0014] Through the above arrangement, the limiting sliding groove and the fixing key fix the test shaft circumferentially in the rotating sleeve.

[0015] Furthermore, the rotating sleeve includes a first main sleeve and a limit sleeve. The first main sleeve is horizontally rotatably connected to the frame. The limit slide groove is arranged on the inner side of the first main sleeve. One end of the first main sleeve is provided with an installation groove adapted to the limit sleeve. One end of the limit slide groove passes through the installation groove. The limit sleeve is locked in the installation groove, and a limit surface for a limit fixing key is formed at the end of the limit slide groove. The test shaft passes through the limit sleeve and is slidably connected to the limit sleeve. The end of the traction rope extends into the first main sleeve and is connected to the test shaft.

[0016] Through the above arrangement, it is convenient to install the test shaft on the rotating sleeve.

[0017] Furthermore, the test shaft is provided with rope threading holes passing through both ends, and the outer end of the test shaft is provided with a second thrust bearing, a ball contact block and a ball. The second thrust bearing is located between the friction part and the ball contact block. The ball presses against the end of the ball contact block and is spaced apart from the test shaft. The end of the traction rope passes through the rope threading hole and is detachably connected to the ball.

[0018] Through the above arrangement, the second thrust bearing is located between the friction member and the ball contact block to reduce the wear of the friction member and the ball contact block. The ball abuts against the end of the ball contact block and is spaced apart from the test shaft to reduce the wear of the ball. In addition, the end of the guide rope passes through the rope threading hole and is detachably connected to the ball, which facilitates the removal of the axial weight and the ball for replacement of the sleeve.

[0019] Furthermore, the rotating sleeve includes a second main sleeve, which is horizontally rotatably connected to the frame, and limiting slide grooves are arranged on the inner walls on both sides of the second main sleeve. The test shaft passes through the second main sleeve, and the end of the test shaft away from the friction member protrudes from the end surface of the second main sleeve. The rotating sleeve also includes a transmission assembly and clamping plates arranged on both sides of the second main sleeve. The test shaft is connected to the clamping plates through the transmission assembly. A pushing shaft device is installed on the frame to drive the test shaft to move axially. When the test shaft moves outward, the friction member is separated from the shaft sleeve to be tested, the clamping plate clamps the test seat, and the inner wall of the test seat is coaxial with the test shaft.

[0020] Through the above arrangement, it is not necessary to remove the axial weight and the radial weight when replacing the shaft sleeve, thereby reducing labor intensity and further improving test efficiency.

[0021] Furthermore, the clamping plate includes an arc plate and a guide rod, the arc plate is used to clamp the test seat, a guide groove is provided at the end of the second main sleeve, one end of the guide rod is fixedly connected to the arc plate, and the other end of the guide rod is slidably connected in the guide groove and is provided with a groove, and an inclined surface is provided in the groove, the transmission assembly includes a reset spring and a push rod, the guide rod is connected to the bottom of the guide groove through the reset spring, the limiting slide groove is provided on the side of the guide groove away from the friction member, and a through hole is provided in the second main sleeve to connect the guide groove and the limiting slide groove, one end of the push rod is fixedly connected to the fixed key, the push rod passes through the through hole toward the inclined surface, and the push rod squeezes the inclined surface to drive the clamping plate to clamp the test seat.

[0022] Through the above arrangement, the reset spring helps the clamp to loosen the test seat, and the push rod squeezes the inclined surface to help the clamp to press the test seat.

[0023] Furthermore, the test shaft includes a first shaft segment, a pull rope, a buffer spring and a second shaft segment. One end of the first shaft segment is slidably connected in the second main sleeve, and the other end protrudes from the end surface of the second main sleeve and is locked with a friction part. The fixed key is fixedly connected to the first shaft segment, the buffer spring and the pull rope are connected in parallel between the first shaft segment and the second shaft segment, and one end of the second shaft segment away from the first shaft segment protrudes from the end surface of the second main sleeve and is connected to the traction rope, and the pushing shaft device is used to drive the second shaft segment to move axially.

[0024] Through the above arrangement, the pull rope is used to transmit the gravity of the axial weight, the buffer spring is used to transmit the thrust of the shaft pushing device, and the buffer spring has a buffering effect to prevent the push rod from being broken due to excessive force. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 FIG. 4 is a side view of a test bench of an embodiment.

[0026] Figure 2 FIG. 4 is a top view of a test bench according to an embodiment of the present invention.

[0027] Figure 3 4 is a cross-sectional view of a test station of an embodiment.

[0028] Figure 4 for Figure 3 Enlarged view of point A.

[0039] Figure 5 FIG. 4 is a cross-sectional view of a test station according to another embodiment.

[0030] Figure 6 for Figure 5 Enlarged view of point B.

[0031] Figure 7 It is a schematic diagram of the clamping plate holding the test seat;

[0032] In the figure, 3, frame; 4, rotating sleeve; 41, first main sleeve; 42, limiting sleeve; 43, second main sleeve; 431, guide groove; 432, through hole; 44, transmission assembly; 441, reset spring; 442, push rod; 45, clamping plate; 451, arc plate; 452, guide rod; 453, inclined plane; 5, test shaft; 51, rope threading hole; 52, first shaft section; 53, pull rope; 54, buffer spring; 55, second shaft section; 6, test seat; 7, radial weight; 8, friction member; 9. traction rope; 10. axial weight; 11. reversing mechanism; 111. first thrust bearing; 112. second thrust bearing; 12. swing arm; 120. ball contact block; 13. moving beam; 130. key; 14. connecting shaft; 15. first linear drive; 16. support seat; 17. bearing; 18. limit slide groove; 19. fixed key; 20. ball; 21. push shaft device; 211. push plate; 212. second linear drive; 213. rope hole; 200. shaft sleeve to be tested. DETAILED DESCRIPTION

[0033] The technical solution of the present invention is further specifically described below through embodiments and in conjunction with the accompanying drawings.

[0034] like Figures 1 to 4 As shown, a multi-station bidirectional loading sleeve test bench comprises: a frame 3 and multiple test stations, the test stations comprise a rotating sleeve 4, a test shaft 5, a test seat 6 and a radial weight 7, the rotating sleeve 4 is horizontally rotatably connected to the frame 3, one end of the test shaft 5 is axially slidably connected in the rotating sleeve 4 and circumferentially fixed, the other end of the test shaft 5 is used for clearance fit with the sleeve 200 to be tested, the test seat 6 is an annular structure whose inner wall can be tightly fitted with the outer periphery of the sleeve 200 to be tested, and the radial weight 7 is hung on the lower side of the test seat 6; the test station also comprises: a friction member 8, a traction rope 9, an axial weight 10 and a reversing mechanism 11, the friction member 8 is locked at the outer end of the test shaft 5, the traction rope 9 is reversed through the reversing mechanism 11, one end of the traction rope 9 is axially connected to the test shaft 5, and the other end is vertically connected to the axial weight 10, and the friction member 8 squeezes the end face of the sleeve 200 to be tested; the test station also comprises: a power mechanism; the power mechanism drives the rotating sleeves 4 of multiple test stations to rotate synchronously.

[0035] Through the above arrangement, firstly, a plurality of test stations are provided, and the plurality of test stations can test a plurality of sleeves of the same or different materials at one time under the same working conditions, thereby improving the sleeve testing efficiency; secondly, the test load is applied by the axial weight 10 and the radial weight 7, and the test load is more stable and precise, thereby improving the accuracy of the test.

[0036] Preferably, the gap between the other end of the test shaft 5 and the tested sleeve 200 is within 0.1 mm, which helps to maintain the stability and consistency of the test process, thereby reducing the test error. If the gap is greater than 0.1 mm, it is easy to cause shaking or deviation during the test process, increasing the test error.

[0037] It is understandable that in other embodiments, the other end of the test shaft and the tested sleeve may also be interference fit, and the interference is within 0.2 mm, which improves the stability and reliability of the test. If the interference is greater than 0.2 mm, the excessive interference will make the assembly between the tested sleeve and the test shaft very difficult, requiring the use of special tools or greater force to complete the installation, increasing the difficulty of the test.

[0038] The frame 3 of the present application is a frame structure assembled from profiles, which is light in weight and has good stability; each test station can test the wear resistance of the end face and inner wall of a tested sleeve 200; wherein the tested sleeve 200 is specifically a sleeve with a flange, and the wear resistance of its inner wall and flange surface needs to be tested; during the test, the tested sleeve 200 is pressed into the test seat 6, and the inner wall of the test seat 6 is tightly matched with the outer wall of the tested sleeve 200, and the two cannot rotate relative to each other; the outer diameter of the test shaft 5 is substantially equal to the inner diameter of the tested sleeve 200, and the tested sleeve 200 is pressed into the test seat 6. The outer end of the test shaft 5 is sleeved, and the flange of the shaft sleeve 200 to be tested faces outward. At this time, the inner wall clearance of the test shaft 5 and the shaft sleeve 200 to be tested is matched, and the upper inner wall of the shaft sleeve 200 to be tested is against the upper side of the test shaft 5, and the test shaft 5 and the shaft sleeve 200 to be tested can rotate freely relative to each other; a radial weight 7 is hung on the lower side of the test seat 6, and the gravity of the radial weight 7 pulls the test seat 6 vertically downward, so that the shaft sleeve 200 to be tested is subjected to a downward radial force and pressed on the upper side of the test shaft 5, and a friction member 8 is sleeved on the outer end of the test shaft 5 and locked. The friction member 8 is located on the shaft sleeve. On the side away from the rotating sleeve 4, one side of the friction member 8 is a circular plane and is against the flange surface of the shaft sleeve 200 to be tested; an axial weight 10 is hung on the lower end of the traction rope 9, and the axial weight 10 applies an axial force to the test shaft 5 through the traction rope 9. The test shaft 5 can move axially freely in the rotating sleeve 4. The friction member 8 is pressed against the flange surface of the shaft sleeve 200 to be tested. A first thrust bearing 111 is provided between the rotating sleeve 4 and the test seat 6 to block the rigid friction between the rotating sleeve 4 and the test seat 6. The first thrust bearing 111 is adapted to the test shaft 5. The test shaft 5 is connected to the test shaft 5, and the axial movement of the test shaft 5 is not hindered. When the test shaft 5 rotates to test the sleeve 200 to be tested, the first thrust bearing 111 supports the test seat 6 to reduce the wear of the limit sleeve 42. The test shaft 5 is provided with a rope threading hole 51 that runs through both ends. The outer end of the test shaft 5 is provided with a second thrust bearing 112 and a ball contact block 120. The ball contact block 120 is located at the end of the test shaft 5. The second thrust bearing 112 is located between the friction member 8 and the ball contact block 120 to reduce the wear of the friction member 8 and the ball contact block 120. The friction member 8 is installed in the test shaft 5 and is installed by key connection with a key 130. The length of the key 130 is less than the friction key 8, and the key 130 is avoided as much as possible from contacting the test seat 6 and the second thrust bearing 112. A sphere 20 is provided at the outer end of the test shaft 5, and the sphere 20 abuts against the end of the sphere contact block 120. The surface where the sphere contact block 120 contacts the sphere 20 is a concave spherical surface, and the depth is about 1 / 5 of the sphere 20. The sphere 20 does not contact the test shaft 5, and the distance between the sphere 20 and the test shaft 5 is greater than the thickness of the flange of the sleeve 200 to be tested.The ball contact block 120 is installed on the test shaft 5 and fits loosely with the test shaft 5. The end of the traction rope 9 passes through the rope threading hole 51 and is detachably connected to the ball 20. When the flange surface of the tested sleeve 200 is worn, the axial force of the traction rope 9 on the ball 20 will push the ball contact block 120 to move inward, so that the friction member 8 is always in contact with the flange surface of the tested sleeve 200. The friction member 8 can move and always maintain contact with the flange surface of the tested sleeve 200.

[0039] After the power mechanism drives the rotating sleeve 4 to rotate around the axis, the rotating sleeve 4, the test shaft 5 and the friction member 8 rotate synchronously, while the test seat 6 basically does not rotate due to the gravity of the radial weight 7, that is, the shaft sleeve 200 to be tested in the test seat 6 basically does not rotate. At this time, the shaft sleeve 200 to be tested and the test shaft 5 rotate relatively, and the test shaft 5 rubs against the inner wall of the shaft sleeve 200 to be tested. In addition, the ball 20 pushes the ball contact block 120, so that the second thrust bearing 112 pushes the friction member 8, so that the friction member 8 The rubbing member 8 presses the flange surface of the shaft sleeve 200 to be tested, and the friction member 8 rubs the flange surface of the shaft sleeve 200 to be tested; according to the test requirements of the shaft sleeve 200 to be tested, during the test, the power mechanism first drives the rotating sleeve 4 to rotate clockwise to the test angle, and then drives the rotating sleeve 4 to rotate counterclockwise to the test angle, and repeats for multiple cycles to rub the inner wall and flange surface of the shaft sleeve 200 to be tested back and forth. After multiple cycles, the power mechanism stops, and the shaft sleeve 200 to be tested is taken out to observe the wear of the flange surface and the inner wall to determine whether the wear resistance is qualified;

[0040] The specific steps for removing the sleeve 200 to be tested are as follows: separate the end of the traction rope 9 from the ball 20, remove the ball contact block 120, the second thrust bearing 112, and the friction member 8, replace the sleeve 200 to be tested, and after the replacement is completed, reconnect the ball 20 to the traction rope 9, and perform the test according to the above steps. As an implementation method, the reversing mechanism 11 is set as a pulley installed on the frame 3, and the traction rope 9 is reversed through the pulley.

[0041] It should be noted that the traction rope 9 of the present application can be connected to the sphere 20 by knotting. The outer diameter of the sphere 20 is larger than the outer diameter of the test shaft 5 to prevent the sphere 20 from entering the threading channel as a whole. The axial weight 10 pulls the sphere 20 through the traction rope 9.

[0042] As an implementation method, multiple test stations are arranged on both sides of the frame 3 along the front-to-back direction. The power mechanism includes multiple swing arms 12 and two moving beams 13. The two moving beams 13 extend along the front-to-back direction and are respectively arranged above the test stations on the left and right sides. The swing arms 12 are installed on the rotating sleeves 4 of the test stations. The swing arms 12 on the left are parallel to each other and hinged to the moving beam 13 on the left. The swing arms 12 on the right are parallel to each other and hinged to the moving beam 13 on the right. The power mechanism also includes a push-pull device for driving the moving beam 13 to move forward and backward.

[0043] Through the above arrangement, the push-pull device drives the rotating sleeve 4 to reciprocate through the moving beam 13 and the swing arm 12.

[0044] The test stations of the present application are symmetrically arranged on the left and right sides of the frame 3. In the present application, six test stations are arranged on the left and right sides of the frame 3, and the wear resistance of twelve shaft sleeves 200 to be tested can be tested at one time; the lengths of the swing arms 12 on each side are equal to each other and are arranged in parallel, and the moving beam 13 is located at the upper end of the swing arm 12 and plays a transmission role, so that the swing arm 12 connected thereto rotates forward or backward synchronously, and the swing amplitude and angle of the swing arm 12 of each test station are highly unified, which increases the uniformity of the test; when the push-pull device drives the moving beam 13 to move forward, the swing arm 12 rotates forward, and when the push-pull device drives the moving beam 13 to rotate backward, the swing arm 12 rotates backward, and the push-pull device drives the moving beam 13 back and forth to reciprocate and reverse the shaft sleeve 200 to be tested to test the wear resistance; specifically, the upper end of the swing arm 12 supports the moving beam 13. Since the length of the swing arm 12 is fixed, the moving beam 13 will have a certain up and down floating during the swinging process of the swing arm 12, which does not affect the driving function of the push-pull device.

[0045] As an implementation method, the push-pull device includes a connecting shaft 14 and a first linear drive 15, the two moving beams 13 are fixedly connected by the connecting shaft 14, one end of the first linear drive 15 is hinged to the frame 3, and the other end of the first linear drive 15 is hinged to the connecting shaft 14.

[0046] Through the above arrangement, the first linear drive 15 drives the two moving beams 13 to move synchronously through the connecting shaft 14, so that the swing arms 12 of the left and right test stations can move synchronously.

[0047] The connecting shaft 14 of the present application is vertically fixedly connected between the left and right moving beams 13 to play a transmission role; the first linear drive 15 can adopt a driving device such as a cylinder; a force sensor can be loaded on the first linear drive 15 to collect push and pull forces, evaluate the friction force of the system to evaluate the friction force of the tested sleeve 200. The first linear drive 15 is basically installed on the frame 3 in the front-to-back direction. When the first linear drive 15 is extended, the moving beam 13 is driven forward through the connecting shaft 14, and when it is shortened, the moving beam 13 is driven backward through the connecting shaft 14.

[0048] As an implementation method, the test station also includes a support seat 16 and a bearing 17. The support seat 16 is installed on the frame 3. The rotating sleeve 4 passes through the support seat 16 and is rotatably connected to the support seat 16. The bearing 17 is installed between the support seat 16 and the rotating sleeve 4.

[0049] Through the above arrangement, the rotating sleeve 4 can rotate stably and the rotation resistance of the rotating sleeve 4 can be reduced.

[0050] As an implementation method, a limiting slot 18 is axially arranged on the inner side of the rotating sleeve 4 , and a fixing key 19 adapted to the limiting slot 18 is fixedly connected to the side of the test shaft 5 , and the fixing key 19 is slidably connected in the limiting slot 18 .

[0051] Through the above arrangement, the limiting sliding groove 18 and the fixing key 19 fix the test shaft 5 circumferentially in the rotating sleeve 4 .

[0052] When the rotating sleeve 4 of the present application rotates, the test shaft 5 is driven to rotate synchronously through the fixed key 19, that is, the test shaft 5 is circumferentially fixed in the rotating sleeve 4; when the test shaft 5 moves axially, the fixed key 19 moves along the limiting slide groove 18.

[0053] As an implementation method, the rotating sleeve 4 includes a first main sleeve 41 and a limit sleeve 42. The first main sleeve 41 is horizontally rotatably connected to the frame 3. The limit slide groove 18 is arranged on the inner side of the first main sleeve 41. One end of the first main sleeve 41 is provided with a mounting groove adapted to the limit sleeve 42. One end of the limit slide groove 18 passes through the mounting groove. The limit sleeve 42 is locked in the mounting groove, and a limit surface for limiting the fixed key 19 is formed at the end of the limit slide groove 18. The test shaft 5 passes through the limit sleeve 42 and is slidably connected to the limit sleeve 42. The end of the traction rope 9 extends into the first main sleeve 41 and is connected to the test shaft 5.

[0054] Through the above arrangement, it is convenient to install the test shaft 5 on the rotating sleeve 4.

[0055] The first main sleeve 41 of the present application is horizontally rotatably connected in the support seat 16. When installing the test shaft 5, the test shaft 5 is inserted into the first main sleeve 41 through the installation groove, and the fixed key 19 enters the limiting slide groove 18. Then the limiting sleeve 42 is sleeved on the test shaft 5 and embedded in the installation groove. An annular threaded cover is tightened on the end of the first main sleeve 41. The annular threaded cover abuts against the outer end of the limiting sleeve 42 to prevent the limiting sleeve 42 from coming out of the installation groove. The limiting sleeve 42 prevents the test shaft 5 from being pulled out. At this point, the installation of the test shaft 5 is completed; wherein, the inner diameter of the limiting sleeve 42 is adapted to the outer diameter of the test shaft 5, and the test shaft 5 is not easy to shake when rotating around the axis. When testing the shaft sleeve 200 to be tested, the side of the test seat 6 away from the friction member 8 abuts against the limiting sleeve 42, and the limiting sleeve 42 supports the test seat 6;

[0056] In the above embodiment, when replacing the shaft sleeve 200 to be tested, the axial weight 10 and the radial weight 7 need to be removed. Since there are many test stations, the workload is large. Figures 5 to 7As shown, another embodiment is proposed: the rotating sleeve 4 includes a second main sleeve 43, the second main sleeve 43 is horizontally rotatably connected to the frame 3, the limiting slide grooves 18 are arranged on the inner walls on both sides of the second main sleeve 43, the test shaft 5 passes through the second main sleeve 43, and the end of the test shaft 5 away from the friction member 8 protrudes from the end surface of the second main sleeve 43. The rotating sleeve 4 also includes a transmission assembly 44 and a clamping plate 45 arranged on both sides of the second main sleeve 43. The test shaft 5 is transmission-connected to the clamping plate 45 through the transmission assembly 44. A pushing shaft device 21 is installed on the frame 3 to drive the test shaft 5 to move axially. When the test shaft 5 moves outward, the friction member 8 is separated from the shaft sleeve 200 to be tested, and the clamping plate 45 clamps the test seat 6. The inner wall of the test seat 6 is coaxial with the test shaft 5.

[0057] Through the above arrangement, it is not necessary to remove the axial weight 10 and the radial weight 7 when replacing the shaft sleeve 200 to be tested, thereby reducing labor intensity and further improving test efficiency.

[0058] When testing the shaft sleeve 200, if Figure 6 As shown, the friction member 8 is pressed against the flange surface of the shaft sleeve to be tested under the action of the gravity of the axial weight 10, and the end surface of the second main sleeve 43 supports the test seat 6; the push shaft device 21 of the present application is located at the end of the test shaft 5 away from the friction member 8, which can push the test shaft 5 away from the end of the friction member 8, and drive the clamping plate 45 to clamp the test seat 6 through the transmission component 44; the inner and outer peripheries of the test seat 6 are coaxial cylindrical surfaces, and the side of the clamping plate 45 close to the test shaft 5 is provided with an arc surface, and the radius of the arc surface is adapted to the outer diameter of the test seat 6; the push shaft device 21 pushes the test shaft 5, and the friction member 8 is separated from the flange surface of the shaft sleeve 200 to be tested. At this time, the push shaft device 21 offsets the gravity of the axial weight 10, and there is no need to remove the axial weight 10. 0, the friction member 8 is separated from the flange surface of the shaft sleeve to be tested. On the one hand, it is convenient to remove the friction member 8 from the test shaft 5. On the other hand, when the test shaft 5 moves, the transmission mechanism drives the clamping plate 45 to clamp the test seat 6 inward. The arc surface of the clamping plate 45 is stably attached to the outer wall of the test seat 6. The inner wall of the test seat 6 is coaxial with the test shaft 5. The clamping plate 45 offsets the gravity of the radial weight 7, and there is no need to remove the radial weight 7. The friction between the shaft sleeve 200 to be tested and the test shaft 5 is also reduced, which makes it convenient to directly pull the shaft sleeve 200 to be tested out of the test seat 6. After the shaft sleeve 200 to be tested leaves the test seat 6, under the clamping action of the clamping plate 45, the test seat 6 will not fall onto the test shaft 5 under the action of the gravity of the radial weight 7. Figure 7As shown, an annular installation space is formed between the test seat 6 and the test shaft 5, and a new shaft sleeve 200 to be tested is directly pressed into the test seat 6, and the friction member 8 is reinstalled on the test shaft 5. The shaft pushing device 21 and the clamping plate 45 release the test shaft 5, and the friction member 8 re-presses the flange surface of the shaft sleeve 200 to be tested under the gravity of the axial weight 10, and the shaft sleeve 200 to be tested is re-pressed on the test shaft 5 under the gravity of the radial weight 7. In the above process, in order to prevent the test seat 6 from being taken away from the clamping plates 45 when the test shaft 5 moves, the side of the test seat 6 away from the second main sleeve 43 can be manually blocked to keep the test seat 6 immobile when the test shaft 5 moves, so that the clamping plate 45 can smoothly clamp the test seat 6.

[0059] As an implementation method, the clamping plate 45 includes an arc plate 451 and a guide rod 452. The arc plate 451 is used to clamp the test seat 6. A guide groove 431 is provided at the end of the second main sleeve 43. One end of the guide rod 452 is fixedly connected to the arc plate 451. The other end of the guide rod 452 is slidably connected in the guide groove 431 and is provided with a groove. A slope 453 is provided in the groove. The transmission assembly 44 includes a reset spring 441 and a push rod 442. The guide rod 452 is connected to the bottom of the guide groove 431 through the reset spring 441. The limiting slide groove 18 is provided on the side of the guide groove 431 away from the friction member 8. A through hole 432 is provided in the second main sleeve 43 to connect the guide groove 431 and the limiting slide groove 18. One end of the push rod 442 is fixedly connected to the fixed key 19. The push rod 442 passes through the through hole 432 toward the slope 453. The push rod 442 squeezes the slope 453 to drive the clamping plate 45 to clamp the test seat 6.

[0060] Through the above arrangement, the reset spring 441 helps the clamping plate 45 to loosen the test socket 6 , and the push rod 442 squeezes the inclined surface 453 to help the clamping plate 45 to press the test socket 6 .

[0061] The radial weight 7 of the present application is connected to the lower side of the test shaft 5 through a hook. The length of the test seat 6 is greater than the length of the shaft sleeve 200 to be tested. After the shaft sleeve 200 to be tested is installed in the test seat 6, there is a gap between the end of the test seat 6 away from the friction member 8 and the test shaft 5. The hook is close to the end of the test seat 6 close to the friction member 8 and is located below the middle of the shaft sleeve 200 to be tested. The arc plate 451 is located on the upper and lower sides of the end of the test seat 6 away from the friction member 8 to prevent the arc plate 451 from interfering with the hook. The above-mentioned arc surface is set on the side of the arc plate 451 close to the test shaft 5; in the initial state, as Figure 6As shown, the spring is in a free state, the arc plate 451 releases the test seat 6, and the push rod 442 releases the inclined surface 453. During the test, the power mechanism drives the second main sleeve 43 to rotate around the axis, and the arc plate 451 rotates synchronously with the second main sleeve 43 and then revolves around the test seat 6 without colliding with the hook. The second main sleeve 43 drives the test shaft 5 to rotate synchronously through the limiting slide groove 18 and the fixed key 19; when replacing the shaft sleeve 200 to be tested, the push shaft device 21 pushes the test shaft 5 away from one end of the friction member 8, and the friction member 8 moves synchronously with the test shaft 5 and separates from the flange surface of the shaft sleeve 200 to be tested, and the push rod 442 squeezes the inclined surface 453. Under the action of the inclined surface 453, the guide rod 452 moves into the guide groove 431 and drives the arc plate 451 to clamp the test seat 6. The reset spring 441 contracts. After the tested sleeve 200 is replaced and the friction member 8 is reinstalled, the push shaft device 21 releases the test shaft 5. The test shaft 5 moves under the gravity of the axial weight 10. The friction member 8 presses the flange surface of the tested sleeve 200 again. The push rod 442 releases the inclined surface 453. The reset spring 441 drives the guide rod 452 to move out of the guide groove 431. The arc plate 451 releases the test seat 6. The tested sleeve 200 is pressed on the test shaft 5 under the gravity of the radial weight 7.

[0062] As an implementation method, the test shaft 5 includes a first shaft segment 52, a pull rope 53, a buffer spring 54 and a second shaft segment 55. One end of the first shaft segment 52 is slidably connected in the second main sleeve 43, and the other end protrudes from the end surface of the second main sleeve 43 and is locked with a friction member 8. The fixed key 19 is fixedly connected to the first shaft segment 52. The buffer spring 54 and the pull rope 53 are connected in parallel between the first shaft segment 52 and the second shaft segment 55. One end of the second shaft segment 55 away from the first shaft segment 52 protrudes from the end surface of the second main sleeve 43 and is connected to the traction rope 9. The pushing shaft device 21 is used to drive the second shaft segment 55 to move axially.

[0063] Through the above arrangement, the pull rope 53 is used to transmit the gravity of the axial weight 10, and the buffer spring 54 is used to transmit the thrust of the shaft pushing device 21, and the buffer spring 54 has a buffering effect to prevent the push rod 442 from being broken due to excessive force.

[0064] In the initial state, if Figure 6 As shown, the gravity of the axial weight 10 is transmitted to the friction member 8 through the traction rope 9, the second shaft segment 55, the pull rope 53 and the first shaft segment 52, so that the friction member 8 is pressed against the flange surface of the shaft sleeve 200 to be tested; the push shaft device 21 pushes the second shaft segment 55 to move toward the first shaft segment 52, the pull rope 53 relaxes, the buffer spring 54 contracts, and applies elastic force to the first shaft segment 52, and the first shaft segment 52 drives the push rod 442 to squeeze the inclined surface 453, so that the arc plate 451 clamps the test seat 6.

[0065] As an implementation, the push shaft device 21 includes a push plate 211 and a second linear driver 212. The push plate 211 is located on the side of the second shaft section 55 away from the first shaft section 52. The push plate 211 is provided with a rope hole 213 whose aperture is smaller than the outer diameter of the second shaft section 55. The traction rope 9 passes through the rope hole 213. The second linear driver 212 is installed on the frame 3 and is used to drive the push plate 211 to approach or move away from the second shaft section 55. The second linear driver 212 can be a cylinder, and the rope hole 213 is used to avoid the traction rope 9. The second linear driver 212 drives the push plate 211 to approach the second shaft section 55, and the push plate 211 pushes the second shaft section 55 to move toward the first shaft section 52.

[0066] It should be understood that those skilled in the art can make improvements or changes based on the above description, and all these improvements and changes should fall within the scope of protection of the appended claims of the present invention.

Claims

1. A multi-station bidirectional loading sleeve test bench, characterized in that: include: A frame and multiple test stations, the test station includes a rotating sleeve, a test shaft, a test seat and a radial weight, the rotating sleeve is horizontally rotatably connected to the frame, one end of the test shaft is axially slidably connected to the rotating sleeve and circumferentially fixed, the other end of the test shaft is used for clearance fit or interference fit with the shaft sleeve to be tested, the test seat is an annular structure whose inner wall can be tightly fitted with the outer periphery of the shaft sleeve to be tested, and the radial weight is hung on the lower side of the test seat; the test station also includes: a friction member, a traction rope, an axial weight and a reversing mechanism, the friction member is locked at the outer end of the test shaft, the traction rope is reversed through the reversing mechanism, one end of the traction rope is axially connected to the test shaft, and the other end is vertically connected to the axial weight, and the friction member squeezes the end face of the shaft sleeve to be tested; the test station also includes: a power mechanism; the power mechanism drives the rotating sleeves of multiple test stations to rotate synchronously.

2. A multi-station bidirectional loading sleeve test bench according to claim 1, characterized in that: A plurality of test stations are arranged along the front-to-back direction on both sides of the frame, the power mechanism comprises a plurality of swing arms and two moving beams, the two moving beams extend along the front-to-back direction and are respectively arranged above the test stations on the left and right sides, the swing arms are installed on the rotating sleeves of the test stations, the swing arms on the left are parallel to each other and hinged to the moving beam on the left, the swing arms on the right are parallel to each other and hinged to the moving beam on the right, and the power mechanism also comprises a push-pull device for driving the moving beam to move forward and backward.

3. A multi-station bidirectional loading sleeve test bench according to claim 2, characterized in that: The push-pull device includes a connecting shaft and a first linear drive, the two moving beams are fixedly connected via the connecting shaft, one end of the first linear drive is hinged to the frame, and the other end of the first linear drive is hinged to the connecting shaft.

4. The multi-station bidirectional loading sleeve test bench according to claim 1 is characterized in that: The testing station also includes a support seat and a bearing. The support seat is installed on the frame. The rotating sleeve passes through the support seat and is rotatably connected to the support seat. The bearing is installed between the support seat and the rotating sleeve.

5. The multi-station bidirectional loading sleeve test bench according to claim 1 is characterized in that: A first thrust bearing is provided between the rotating sleeve and the test seat, a limiting slot is axially provided on the inner side of the rotating sleeve, a fixing key adapted to the limiting slot is fixedly connected to the side of the test shaft, and the fixing key is slidably connected in the limiting slot.

6. A multi-station bidirectional loading sleeve test bench according to claim 5, characterized in that: The rotating sleeve includes a first main sleeve and a limiting sleeve, the first main sleeve is horizontally rotatably connected to the frame, the limiting slide groove is arranged on the inner side of the first main sleeve, one end of the first main sleeve is provided with a mounting groove adapted to the limiting sleeve, one end of the limiting slide groove penetrates into the mounting groove, the limiting sleeve is locked in the mounting groove, and a limiting surface for limiting the fixed key is formed at the end of the limiting slide groove, the test shaft passes through the limiting sleeve and is slidably connected to the limiting sleeve, and the end of the traction rope extends into the first main sleeve and is connected to the test shaft.

7. The multi-station bidirectional loading sleeve test bench according to claim 6, characterized in that: The test shaft is provided with rope threading holes passing through both ends, and the outer end of the test shaft is provided with a second thrust bearing, a ball contact block and a ball. The second thrust bearing is located between the friction member and the ball contact block, and the ball abuts against the end of the ball contact block and is spaced apart from the test shaft. The end of the traction rope passes through the rope threading hole and is detachably connected to the ball.

8. The multi-station bidirectional loading sleeve test bench according to claim 5, characterized in that: The rotating sleeve includes a second main sleeve, which is horizontally rotatably connected to the frame, and the limiting slide grooves are arranged on the inner walls of the second main sleeve on both sides opposite to each other. The test shaft passes through the second main sleeve, and one end of the test shaft away from the friction member protrudes from the end surface of the second main sleeve. The rotating sleeve also includes a transmission assembly and clamping plates arranged on both sides opposite to each other of the second main sleeve, and the test shaft is transmission-connected to the clamping plates through the transmission assembly. A pushing shaft device is installed on the frame to drive the test shaft to move axially. When the test shaft moves outward, the friction member is separated from the shaft sleeve to be tested, and the clamping plate clamps the test seat, and the inner wall of the test seat is coaxial with the test shaft.

9. The multi-station bidirectional loading sleeve test bench according to claim 8, characterized in that: The clamping plate includes an arc plate and a guide rod, the arc plate is used to clamp the test seat, a guide groove is provided at the end of the second main sleeve, one end of the guide rod is fixedly connected to the arc plate, the other end of the guide rod is slidably connected to the guide groove and is provided with a groove, an inclined surface is provided in the groove, the transmission assembly includes a reset spring and a push rod, the guide rod is connected to the bottom of the guide groove through the reset spring, the limiting slide groove is provided on the side of the guide groove away from the friction member, a through hole is provided in the second main sleeve to connect the guide groove and the limiting slide groove, one end of the push rod is fixedly connected to the fixed key, the push rod passes through the through hole toward the inclined surface, and the push rod squeezes the inclined surface to drive the clamping plate to clamp the test seat.

10. The multi-station bidirectional loading sleeve test bench according to claim 8, characterized in that: The test shaft includes a first shaft segment, a pull rope, a buffer spring and a second shaft segment. One end of the first shaft segment is slidably connected in the second main sleeve, and the other end protrudes from the end surface of the second main sleeve and is locked with the friction member. The fixed key is fixedly connected to the first shaft segment. The buffer spring and the pull rope are connected in parallel between the first shaft segment and the second shaft segment. One end of the second shaft segment away from the first shaft segment protrudes from the end surface of the second main sleeve and is connected to the traction rope. The pushing shaft device is used to drive the second shaft segment to move axially.

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