A belt wheel fatigue testing machine

Abstract

The application provides a belt wheel fatigue testing machine, comprising: a rotating speed adjusting mechanism comprising a transmission belt and a driving wheel; a load adjusting mechanism comprising a turnover seat driven to move horizontally by a horizontal movement driving device, two guide seats respectively horizontally slidingly connected with guide rods, one end of the turnover seat being provided as a large end close to the driving wheel and having an outer diameter larger than that of the other end, the other end being provided as a small end, the opposite sides of the two guide seats being adaptively embedded with the turnover seat and forming a turnover area corresponding to the large end of the turnover seat, the turnover seat and the two guide seats being locked or unlocked through a locking mechanism, the upper and lower sides of the turnover seat being respectively used for mounting a single belt wheel and two belt wheels, and the transmission belt being used for sleeving the driving wheel and a belt wheel or being used for sleeving the driving wheel, two belt wheels and a first angle wheel. The test efficiency of small size belt wheels is improved through the double wheel test, and the mode switching efficiency is improved through the quick switching of the single wheel mode and the double wheel mode of the turnover seat.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of fatigue testing machine, in particular to a belt pulley fatigue testing machine. BACKGROUND

[0002] The belt pulley plays an important role in the belt transmission, and the belt pulley fatigue testing machine is mainly used for detecting the durability fatigue performance of the belt pulley by simulating the actual working condition of the belt pulley, so as to detect and further improve the belt pulley. The parameters of simulating the actual working condition mainly include the rotation speed, the load and the environmental parameters. The rotation speed parameter is adjusted by the rotation speed of the driving wheel, the load parameter is adjusted by the tension of the belt or the increase and decrease of the radial load of the test wheel, and the environmental parameters mainly include the temperature and the humidity, which can be adjusted by the environmental box.

[0003] The existing belt pulley fatigue testing machine is generally designed as a vertical type in order to adjust the radial load by increasing and decreasing the radial load of the test wheel, that is, the test wheel is vertically rotated, and the load wheel and the test wheel are distributed along the transverse direction. In addition, no matter how large the test wheel is, only one test wheel can be tested in a single test, which will result in that the whole testing machine occupies a large transverse and longitudinal space, and when the size of the test wheel is small, multiple test wheels cannot be tested at the same time, and the test efficiency is low.

[0004] In view of the above problems existing in the prior art, it is the research purpose of the present application to design a belt pulley fatigue testing machine which can improve the test efficiency. SUMMARY

[0005] The present application provides a belt pulley fatigue testing machine, which can effectively solve the above problems.

[0006] The present application is implemented as follows:

[0007] A belt pulley fatigue testing machine, comprising:

[0008] A rotation speed adjusting mechanism, comprising a driving belt and a driving wheel driven to rotate by a rotation driving device;

[0009] The load adjusting mechanism comprises a turnover seat driven to move laterally by a lateral movement driving device, two guide seats respectively connected to guide rods which slide laterally, one end of the turnover seat is arranged close to the driving wheel and has a larger outer diameter than the other end, the other end is arranged as a small end, the opposite sides of the two guide seats are adapted to be embedded in the turnover seat and form a turnover area corresponding to the large end of the turnover seat, the turnover seat and the two guide seats are locked or unlocked by a locking mechanism, the upper and lower sides of the turnover seat are respectively provided with a single shaft for mounting a single pulley and a double shaft for mounting two pulleys, a movable shaft for mounting a first wrap angle wheel is arranged between the double shafts, the transmission belt is used to connect the driving wheel and one pulley or the driving wheel, two pulleys and the first wrap angle wheel; after the locking mechanism is unlocked, the turnover seat moves laterally away from the two guide seats to the small end located in the turnover area, the turnover seat can be turned up and down, after being turned up and down, the turnover seat moves laterally to be embedded in the two guide seats and is locked by the locking mechanism.

[0010] Further, the lateral movement driving device comprises a lateral movement screw driven by a motor, the turnover seat is screwed onto the lateral movement screw, the large end of the turnover seat is provided with two telescopic butt rods corresponding to the two guide seats respectively, and the two guide seats are respectively provided with two butt grooves corresponding to the two butt rods; after the turnover seat is turned up and down, the two butt rods are extended to butt the two butt grooves, and the lateral movement screw drives the turnover seat to move laterally to reset.

[0011] Further, one end of the lateral movement screw is partially provided with a clamping part without thread, one end of each of the two butt rods is provided with a pushing part, the turnover seat is provided with two clamping members connected to a reset spring and arranged to slide longitudinally, the proximal end of each of the two clamping members is arranged to form a clamping part for limiting the clamping of the clamping part, the distal end of each of the two clamping members corresponds to the two pushing parts respectively, and the two butt rods are driven by butt driving devices to be arranged to slide laterally; after the locking mechanism is unlocked, the turnover seat moves laterally away from the two guide seats to the small end located in the turnover area, and the two clamping members correspond to the clamping part, the two butt rods are retracted laterally and push the two clamping members to clamp the clamping part by the pushing part, after the turnover seat is turned up and down, the two butt rods are extended to butt the two butt grooves, and the two clamping members are reset to be separated from the clamping part by the pulling force of the reset spring.

[0012] Further, the locking mechanism comprises two locking members arranged to slide longitudinally in the two guide seats respectively and driven by locking driving devices to move longitudinally, the side walls of the two butt grooves and the two butt rods are provided with through holes arranged to penetrate longitudinally, the opposite sides of the two guide seats are respectively provided with damping interlayers, and the damping interlayers are filled with damping members; after the two butt rods are inserted into the two butt grooves respectively, when the locking mechanism is locked, the two locking members move towards each other to penetrate and lock the butt grooves and the butt rods respectively.

[0013] Further, the distal ends of the two locking members are respectively provided with a pushing part extending downward, the locking mechanism further comprises two limiting members respectively arranged in the lower part of the two guide seats and driven to rotate by a torsion spring, the upper end of the limiting member corresponds to the pushing part, and the lower end of the limiting member forms a limiting part corresponding to the arc-shaped outer wall of the guide rod; when the locking mechanism is unlocked, the two locking members move oppositely and drive the lower ends of the two limiting members to swing oppositely and abut against the outer wall of the guide rod through the pushing parts; when the locking mechanism is locked, the two locking members move oppositely and penetrate through the butt joint groove and the butt joint rod, and the two limiting members are reset to be separated from the guide rod by the torsion spring.

[0014] Further, the distal ends of the two guide rods are respectively provided with a plurality of limiting grooves arranged along the axial direction, the two limiting parts correspond to the plurality of limiting grooves respectively, and the two guide seats are transversely limited and slidably arranged.

[0015] Further, the wrap angle adjusting mechanism comprises the first wrap angle wheel and a plurality of second wrap angle wheels arranged between the driving wheel and the turnover seat and driven to move by the adjusting driving device and press the transmission belt, and the first wrap angle wheel and the second wrap angle wheel are both located outside the transmission belt.

[0016] Further, the number of the second wrap angle wheels is two, and the second wrap angle wheels are rotatably arranged on the two driving seats respectively, and the adjusting driving device comprises a first screw rod driven by a motor and used for driving the two driving seats to move oppositely or oppositely along the longitudinal direction, and two second screw rods driven by a motor and used for driving the first screw rod to move transversely.

[0017] Further, the turnover seat is provided with a transversely extending sliding groove, a jacking rod transversely screwed through one side of the sliding groove, and an adjusting motor used for driving the jacking rod to rotate, the movable shaft is transversely slidably connected to the sliding groove through a sliding block, and the end of the jacking rod is rotatably connected to the sliding block; the adjusting motor drives the jacking rod to rotate to adjust the screwing depth, so as to drive the sliding block to move transversely for adjustment.

[0018] Further, the machine base, the protective cover arranged on the machine base, the environment simulation box arranged on one side of the machine base and having an output end connected to the protective cover, the load adjusting mechanism, the rotating speed adjusting mechanism and the wrap angle adjusting mechanism are all arranged on the machine base and located in the protective cover, and the environment simulation box is used for adjusting the temperature and humidity in the protective cover.

[0019] The beneficial effects of the present application are as follows:

[0020] 1. Through the design of the turnover seat, when facing different sizes of pulleys, single-wheel mode or double-wheel mode can be selected for detection, and the switching between the two modes can be realized by the automatic turnover of the turnover seat, without the need for manual disassembly of the seat body to replace different seat bodies and adjust the connection accuracy of each part to meet the test requirements, greatly saving the time-consuming of the test machine in switching between single-wheel mode and double-wheel mode, thereby not only improving the test efficiency of small-size pulleys through double-wheel test, but also improving the mode switching efficiency through the quick switching of the turnover seat, and the driving wheel and the pulley can be designed as horizontal rotation without the need to add a load wheel structure, so that the overall structure of the test machine is designed as a horizontal type, thereby reducing the overall space ratio of the test machine; on this basis, in order to avoid interference during the turnover of the turnover seat, the turnover seat and the two guide seats are detachably arranged, by designing the turnover seat as one end large and one end small and designing the turnover area with a large end between the two guide seats, thereby realizing the effect of the turnover seat moving horizontally to the small end corresponding to the turnover area without interference, improving the convenience of the turnover seat turnover under the premise of avoiding interference, and at the same time, in order to improve the connection stability of the turnover seat and the two guide seats, the two are locked by the locking mechanism, and the large end of the turnover seat is close to the driving wheel, so that when the load needs to be increased and the turnover seat is stretched away from the driving wheel, the large end of the turnover seat is completely limited and embedded in the turnover area and drives the two guide seats to move horizontally, which can ensure that the turnover seat will not be separated from the two guide seats, greatly improving the connection stability of the turnover seat and the two guide seats, and realizing the effect that the turnover seat can be separated from the two guide seats for turnover and can be stably connected with them for stable load increase and decrease.

[0021] 2. The accuracy of the load adjusting mechanism is improved by the horizontal movement of the lead screw, and on this basis, in order to realize the stable reset of the turnover seat after turnover, a telescopic butt joint rod is added, so that when the turnover seat is separated from the two guide seats for up-down turnover and loses the limit and cannot be driven to move horizontally by the horizontal movement of the lead screw, the butt joint rod can be extended to limit and guide the butt joint groove of the two guide seats, so that the turnover seat can be stably reset and embedded with the two guide seats under the driving of the horizontal movement of the lead screw, ensuring the effect that the turnover seat can be conveniently turned over to facilitate the switching between single-wheel mode and double-wheel mode, and the horizontal movement of the connected turnover seat and guide seat is also guided by the lead screw and the two guide rods, improving the stability of the horizontal movement of the three.

[0022] 3. By adding the clamping part and the clamping piece, after the locking mechanism is unlocked, the flipping seat moves laterally away from the two guide seats until the other end is located in the flipping area and the two clamping pieces correspond to the clamping part. The two docking rods retract laterally and push the two clamping pieces to clamp the clamping part towards each other through the pushing part. After the flipping seat flips up and down, the two docking rods extend out and dock with the two docking slots. The two clamping pieces are reset and released from the clamping part by the tension of the reset spring. Thus, under the premise that the flipping seat and guide seat move laterally towards the drive wheel until the pulley is detachable, the clamping part clamps the clamped part, and the long-distance screw connection between the flipping seat and the transverse lead screw is set to achieve a stable connection between the flipping seat and the transverse lead screw during flipping. This ensures that the flipping seat is not affected by its own weight, improves the stability and accuracy of the flipping seat flipping, and ensures that the flipping seat can be reset and engaged with the two guide seats after a precise 180° flipping. This ensures the stability of switching between single wheel mode and double wheel mode. Furthermore, the reset spring ensures that after the flipping seat is flipped, the two clamping parts reset and disengage from the transverse lead screw, thereby avoiding any impact on the transverse movement of the flipping seat and ensuring transverse movement stability.

[0023] 4. By bringing the large end of the tilting seat closer to the drive wheel to improve the stability of the connection between the three components when the load is increased, the longitudinal through-hole locking rod of the locking component is sufficient to ensure that the tilting seat will not detach from the two guide seats when the load needs to be reduced and the tilting seat moves towards the drive wheel. This further improves the stability of the connection between the three components. In addition, the addition of a shock-absorbing interlayer reduces the vibration intensity between the tilting seat and the two guide seats, thereby avoiding the high-frequency, high-intensity vibration between the tilting seat and the two guide seats during the test when the pulley rotates at high speed, which could cause the locking component, the connecting rod, etc. to break and the locking mechanism to fail. This improves the stability of the tilting seat and the two guide seats after they are connected during the test.

[0024] 5. By adding limiting components, when the locking mechanism is locked, the two locking components move towards each other, passing through the locking docking groove and the docking rod respectively. The two limiting components are then reset and disengaged from the guide rod by the torsion springs. This achieves the goal of limiting the guide rod's lateral movement by the limiting part of the limiting component when the locking mechanism unlocks and the flipping seat is about to disengage from the two guide seats. This prevents the guide seats from sliding during the flipping seat's lateral movement, which could lead to the docking rod not completely disengaging from the guide seats and preventing the flipping seat from flipping. It also prevents mechanical control errors caused by different docking progress of the two docking rods during the flipping seat's reset. The limiting component's setting of the guide seat ensures the stability of the disengagement and docking between the flipping seat and the guide seat. Furthermore, the limiting component is designed to be driven by the locking component, so that the flipping seat and the guide seat are engaged and the two docking rods extend into the docking groove simultaneously. After the locking component extends and passes through the docking rod, the limiting component can be reset under the action of the torsion spring, thus not affecting the lateral sliding of the flipping seat and the guide seat after successful docking. Attached Figure Description

[0025] Figure 1 It is a structural schematic diagram of a belt wheel fatigue testing machine.

[0026] Figure 2 It is Figure 1 It is a structural schematic diagram after removing the machine base and the protective cover.

[0027] Figure 3 It is a partial structural schematic diagram of the load adjusting mechanism after removing the belt wheel and the second wrap angle wheel.

[0028] Figure 4 It is Figure 3 It is a partial structural schematic diagram of the turnover seat after turning over and installing a belt wheel.

[0029] Figure 5 It is Figure 3 It is a vertical sectional structural schematic diagram.

[0030] Figure 6 It is Figure 3 It is a structural schematic diagram after removing one side guide seat.

[0031] Figure 7 It is a horizontal sectional structural schematic diagram of the turnover seat in the turnable state after unlocking.

[0032] Figure 8 It is a horizontal sectional structural schematic diagram of the turnover seat when being butted with the guide seat after turning over.

[0033] Figure 9 It is a partial structural schematic diagram of the clamping member and the transverse moving screw rod.

[0034] Figure 10 It is a partial structural schematic diagram of the clamping member and the transverse moving screw rod in another embodiment. DETAILED DESCRIPTION

[0035] Referring to Figures 1-10 , a belt wheel fatigue testing machine comprises:

[0036] The rotating speed adjusting mechanism 1 comprises a transmission belt 11 and a driving wheel 12 driven to rotate by a rotating driving device 13.

[0037] The load adjusting mechanism 2 comprises a turnover seat 22 driven to move laterally by a lateral driving device 21, two guide seats 23 respectively connected to guide rods 24 to slide laterally, the turnover seat 22 is provided with a large end 221 at one end and a small end 222 at the other end, the large end 221 is close to the driving wheel 12 and has an outer diameter larger than that of the small end 222, the two guide seats 23 are adapted to be embedded into the turnover seat 22 at the opposite sides and form a turnover area 231 corresponding to the large end 221 of the turnover seat 22, the turnover seat 22 and the two guide seats 23 are locked or unlocked by a locking mechanism 3, the upper and lower sides of the turnover seat 22 are respectively provided with a single shaft 223 for mounting a single belt wheel 5 and a double shaft 224 for mounting two belt wheels 5, the double shaft 224 is provided with a movable shaft 225 for mounting a first wrap angle wheel 41 and is arranged laterally, the transmission belt 11 is used to connect the driving wheel 12 and one belt wheel 5 or the driving wheel 12, two belt wheels 5 and the first wrap angle wheel 41; after the locking mechanism 3 is unlocked, the turnover seat 22 moves away from the two guide seats 23 to the small end 222 located in the turnover area 231, the turnover seat 22 can be turned up and down, after being turned up and down, the turnover seat 22 is moved back to be embedded into the two guide seats 23 and is locked by the locking mechanism 3.

[0038] A control system is used to control the operation of each mechanism.

[0039] A detection system is used to detect each test data, the detection system specifically comprises sensors for detecting load, tensile displacement, rotating speed and the like, the specific structure is not the focus of the present application and will not be described here.

[0040] The structure above, through the design of the turnover seat 22, makes it possible to select single-wheel mode or double-wheel mode for detection when facing different sizes of pulleys 5, and the switching between the two modes can be realized by automatic turnover of the turnover seat 22, without the need for manual disassembly of the seat body to replace different seat bodies and adjust the connection accuracy of various parts to meet the test requirements, greatly saving the time-consuming of the test machine in switching between single-wheel mode and double-wheel mode, thereby not only improving the test efficiency of small-size pulleys 5 through double-wheel test, but also improving the mode switching efficiency through the quick switching of the turnover seat 22, and the driving wheel 12 and the pulley 5 can be designed as horizontal rotation without the need for additional load wheel structure, so that the overall structure of the test machine is designed as horizontal type, thereby reducing the overall space ratio of the test machine; on this basis, in order to avoid interference in the turnover of the turnover seat 22, it is detachably arranged with the two guide seats 23, by designing the turnover seat 22 as one end large and one end small and designing the turnover area 231 between the two guide seats 23 to adapt to the large end 221, thereby realizing the effect of up-down turnover without interference when the turnover seat 22 is horizontally moved to the small end 222 corresponding to the turnover area 231, improving the convenience of the turnover of the turnover seat 22 on the premise of avoiding interference, and at the same time, in order to improve the connection stability of the turnover seat 22 and the two guide seats 23, they are locked by the locking mechanism 3, and the large end 221 of the turnover seat 22 is close to the driving wheel 12, so that when the load needs to be increased and the turnover seat 22 is stretched in the direction away from the driving wheel 12, the large end 221 of the turnover seat 22 is completely limited and embedded in the turnover area 231 and drives the two guide seats 23 to horizontally move, which can ensure that the turnover seat 22 will not be separated from the two guide seats 23, greatly improving the connection stability of the turnover seat 22 and the two guide seats 23, realizing the effect that the turnover seat 22 can be separated from the two guide seats 23 for turnover and can be stably connected with them for stable load increase and decrease.

[0041] In order to improve the driving accuracy of the horizontal movement driving device 21, the horizontal movement driving device 21 comprises a horizontal movement screw 211 driven by a motor, the turnover seat 22 is screwed on the horizontal movement screw 211, the inner end of the turnover seat 22 is provided with two telescopic abutting rods 226 corresponding to two guide seats 23 respectively, and the two guide seats 23 are respectively provided with two abutting grooves 232 corresponding to the two abutting rods 226; after the locking mechanism 3 is unlocked, the turnover seat 22 is horizontally moved away from the two guide seats 23 to the position where the small end 222 is located in the turnover area 231, then the turnover seat 22 is driven to rotate up and down by the horizontal movement screw 211, the two abutting rods 226 are extended to abut the two abutting grooves 232, and the horizontal movement screw 211 drives the turnover seat 22 to horizontally move back to the original position. The above structure improves the accuracy of the load adjusting mechanism 2 by the horizontal movement screw 211, and on this basis, in order to realize the stable reset of the turnover seat 22 after the turnover, the telescopic abutting rods 226 are additionally arranged, so that when the turnover seat 22 is separated from the two guide seats 23 to rotate up and down and loses the limit and cannot be driven to horizontally move by the horizontal movement screw 211, the abutting rods 226 can be extended to abut the abutting grooves 232 of the two guide seats 23 to limit and guide, so that the turnover seat 22 can be stably reset and connected with the two guide seats 23 under the driving of the horizontal movement screw 211, thereby ensuring the turnover seat 22 to be conveniently turned over to realize the effect of conveniently switching between the single-wheel mode and the double-wheel mode, and the horizontal movement of the connected turnover seat 22 and guide seat 23 is guided by the screw rod and the two guide rods 24, thereby improving the stability of the horizontal movement of the three.

[0042] In order to avoid the situation that the turnover seat 22 cannot be driven to rotate by the horizontal moving screw rod 211 due to its own weight, or the turnover angle is not accurate enough to cause the turnover seat 22 to fail to be connected with the two guide seats 23, in order to improve the turnover stability of the turnover seat 22, one end of the horizontal moving screw rod 211 is locally provided with a clamped portion 2111 without thread, one end of each of the two abutting rods 226 is provided with a pushing portion 2261, the turnover seat 22 is provided with two clamping pieces 228 connected with return springs 227 and longitudinally slidingly arranged, the proximal ends of the two clamping pieces 228 are respectively formed with clamping portions 2281 for limiting the clamping of the clamped portion 2111, the distal ends of the two clamping pieces 228 correspond to the two pushing portions 2261 respectively, the two abutting rods 226 are horizontally telescopically arranged and driven by an abutting driving device 229, specifically, the upper and lower sides of the clamping piece 228 are connected with the inner wall of the turnover seat 22 through the return spring 227, the opposite sides of the two clamping portions 2281 are made of high-friction and anti-slip material, in another embodiment, the outer wall of the clamped portion 2111 can also be circumferentially and intermittently recessed to be provided with a plurality of clamped grooves 2112, the opposite sides of the two clamping portions 2281 are protrusively provided with a plurality of clamping protrusions 2282 corresponding to the plurality of clamped grooves 2112, thereby further improving the limiting strength of the two clamping pieces 228 after clamping the clamped portion 2111. The above structure is provided by adding the clamped portion 2111 and the clamping piece 228, so that when the turnover seat 22 is horizontally moved away from the two guide seats 23 to the small end 222 located in the turnover area 231 and the two clamping pieces 228 correspond to the clamped portion 2111 after the unlocking of the locking mechanism 3, the two abutting rods 226 are horizontally retracted and push the two clamping pieces 228 to clasp the clamped portion 2111 through the pushing portion 2261, after the turnover seat 22 is turned upside down, the two abutting rods 226 are extended to abut the two abutting grooves 232, and the two clamping pieces 228 are reset to disengage from the clamping portion 2281 by the pulling force of the return spring 227. Thus, under the premise that the turnover seat 22 and the guide seat 23 are horizontally moved to the driving wheel 12 and the pulley 5 can be detached, the clamping of the clamping portion 2281 on the clamped portion 2111 is used to realize the stable connection between the turnover seat 22 and the horizontal moving screw rod 211 during turnover, to ensure that the turnover of the turnover seat 22 is not affected by its own weight, to improve the stability and accuracy of the turnover of the turnover seat 22, to ensure that the turnover seat 22 can be reset to be embeddedly connected with the two guide seats 23 after being accurately turned over by 180°, to ensure the stability of the single-wheel mode and double-wheel mode switching, and through the setting of the return spring 227, the two clamping pieces 228 are reset to disengage from the horizontal moving screw rod 211 after the turnover of the turnover seat 22 is completed, thereby avoiding affecting the horizontal movement of the turnover seat 22 and ensuring the stability of the horizontal movement.

[0043] In order to improve the stability of the connection between the turnover seat 22 and the two guide seats 23, the locking mechanism 3 comprises two locking members 31 respectively longitudinally slidingly arranged in the two guide seats 23 and respectively driven by the locking driving device 32 to longitudinally move, the two butt-joint grooves 232 and the two butt-joint rods 226 are longitudinally and transversely provided with perforations, the opposite sides of the two guide seats 23 are respectively provided with shock-absorbing layers 233, the shock-absorbing layers 233 are filled with shock-absorbing members, specifically, the shock-absorbing members are a plurality of damping particles which can weaken the vibration between the turnover seat 22 and the guide seats 23 by the collision between the damping particles; after the two butt-joint rods 226 are respectively inserted into the two butt-joint grooves 232, when the locking mechanism 3 is locked, the two locking members 31 move towards each other to lock the butt-joint grooves 232 and the butt-joint rods 226. Under the premise of improving the stability of the connection between the turnover seat 22, the driving wheel 12 and the transmission belt 11 when the load is increased, by longitudinally penetrating and locking the butt-joint rods 226 through the locking members 31, it is ensured that the turnover seat 22 will not be separated from the two guide seats 23 during the process of reducing the load and moving the turnover seat 22 towards the driving wheel 12, and the tension of the turnover seat 22 is gradually reduced by the tension of the transmission belt 11, thereby further improving the stability of the connection between the three, and by adding the shock-absorbing layers 233, the vibration intensity between the turnover seat 22 and the two guide seats 23 is reduced, thereby avoiding the high-frequency and high-intensity vibration between the turnover seat 22 and the two guide seats 23 during the test process, which causes the locking members 31, the butt-joint rods 226 and other components to break, resulting in the locking failure of the locking mechanism 3, thereby improving the stability of the connection between the turnover seat 22 and the two guide seats 23 during the test process.

[0044] To ensure the stability of the docking of the turnover seat 22 and the two guide seats 23, the distal ends of the two locking members 31 are respectively provided with a push part 33 extending downward, the locking mechanism 3 further comprises two limiting members 34 respectively arranged in the lower part of the two guide seats 23 and rotating through a torsion spring 35, the upper end of the limiting member 34 corresponds to the push part 33, and the lower end forms a limiting part corresponding to the arc-shaped outer wall of the guide rod 24; when the locking mechanism 3 is unlocked, the two locking members 31 move in opposite directions and respectively push the lower end of the two limiting members 34 to swing in the opposite direction to be limited and attached to the outer wall of the guide rod 24. The above structure is provided with the limiting member 34, so that when the locking mechanism 3 is locked, the two locking members 31 move in the opposite direction and respectively lock the docking groove 232 and the docking rod 226, and the two limiting members 34 are reset to be separated from the guide rod 24 under the driving of the torsion spring 35. When the locking mechanism 3 is unlocked and the turnover seat 22 is about to be separated from the two guide seats 23, the limiting part of the limiting member 34 is limited and attached to the outer wall of the guide rod 24, thereby limiting the horizontal movement of the guide seat 23, so as to avoid the problem that the guide seat 23 slides when the turnover seat 22 moves horizontally and separates from the two guide seats 23, and further causes the docking rod 226 to fail to completely separate from the guide seat 23, so that the turnover seat 22 cannot be turned over, or the mechanical control is wrong due to the different docking progress of the two docking rods 226 when the turnover seat 22 is reset. The limiting of the guide seat 23 by the limiting member 34 ensures the stability of the separation and docking between the turnover seat 22 and the guide seat 23. Furthermore, the limiting member 34 is driven by the locking member 31, so that the turnover seat 22 and the guide seat 23 are embedded and the two docking rods 226 are synchronously inserted into the docking groove 232, and after the locking member 31 is extended and penetrates the docking rod 226, the limiting member 34 can be reset under the driving of the torsion spring 35, so as not to affect the horizontal sliding of the turnover seat 22 and the guide seat 23 after successful docking.

[0045] To improve the limiting stability of the limiting member 34, the distal sides of the two guide rods 24 are respectively recessed to be provided with a plurality of limiting grooves 241 arranged along the axial direction, and the two limiting parts respectively correspond to the plurality of limiting grooves 241. When the locking mechanism 3 is unlocked, the two locking members 31 move in opposite directions and respectively push the lower end of the two limiting members 34 to swing in the opposite direction to be limited and embedded into the limiting groove 241, and the two guide seats 23 are arranged to horizontally limit and slide, specifically, the bottom of the two guide seats 23 is horizontally slidably connected to the base 6 through a sliding block and a sliding rail. Therefore, through the addition of the limiting groove 241 and the horizontal limiting and embedding of the limiting part and the limiting groove 241, the limiting stability of the limiting member 34 is improved, and the stability of the limiting of the guide seat 23 is further improved.

[0046] In order to further improve the functionality of the testing machine, the testing machine further comprises a wrap angle adjusting mechanism 4, which comprises the first wrap angle wheel 41 and a plurality of second wrap angle wheels 42 located between the driving wheel 12 and the turnover seat 22 and moving the inner pressure of the transmission belt 11 driven by the adjusting driving device, and the first wrap angle wheel 41 and the second wrap angle wheel 42 are located outside the transmission belt 11, and specifically, the number of the second wrap angle wheel 42 is two and is symmetrically located on the longitudinal two outer sides of the transmission belt 11. The above structure is added by the second wrap angle wheel 42, so that in the single wheel mode, the wrap angle of the transmission belt 11 to a belt pulley 5 can be adjusted by the position change of the plurality of second wrap angle wheels 42, and then the wrap angle is adjusted, and in the double wheel mode, the wrap angle of the transmission belt 11 to two belt pulleys 5 can be adjusted by the position change of the plurality of second wrap angle wheels 42 and the first wrap angle transverse movement, so that the testing machine can correspond to the simulation of the actual situation to adjust the wrap angle of the transmission belt 11 to the belt pulley 5 in application, and improve the test function of the testing machine.

[0047] In order to improve the efficiency and precision of the transverse adjustment of the second wrap angle wheel 42, the number of the second wrap angle wheel 42 is two and 42 is respectively rotated on two driving seats 43, the adjusting driving device comprises a first screw rod 44 driven by a motor for driving two driving seats 43 to move longitudinally or oppositely, and two second screw rods 45 driven by a motor for driving the first screw rod 44 to move transversely. The transverse movement and longitudinal movement of the driving seat 43 are realized by the first screw rod 44 and the second screw rod 45, so that the second wrap angle wheel 42 can move bidirectionally to adjust the position, thereby improving the adaptability of the wrap angle adjustment of the transmission belt 11 to the belt pulley 5, and improving the efficiency and precision of the wrap angle adjustment.

[0048] In order to improve the efficiency and precision of the transverse adjustment of the first wrap angle wheel 41, the turnover seat 22 is provided with a transversely extending sliding groove 46, a top rod 47 transversely screwed through one side of the sliding groove 46, and an adjusting motor 48 for driving the top rod 47 to rotate, the movable shaft 225 is transversely slidably connected to the sliding groove 46 through a sliding block, and the end of the top rod 47 is rotatably connected to the sliding block; the adjusting motor 48 drives the top rod 47 to rotate to adjust the screwing depth, thereby driving the sliding block to move transversely. The automatic transverse movement of the first wrap angle wheel 41 is realized by the adjusting motor 48 driving the top rod 47, which improves the efficiency and precision of the transverse adjustment of the first wrap angle wheel 41, thereby improving the adaptability of the wrap angle adjustment of the transmission belt 11 to the belt pulley 5, and improving the efficiency and precision of the wrap angle adjustment.

[0049] In the high-speed test state, the transmission belt 11 has the probability of wear and breakage, therefore, in order to avoid the transmission belt 11 from flying out and hurting people after breakage, the testing machine further comprises a machine base 6, a protective cover 7 arranged on the machine base 6, an environment simulation box (not shown in the figure) arranged on one side of the machine base 6 and having an output end connected with the protective cover 7, the load adjusting mechanism 2, the rotating speed adjusting mechanism 1 and the wrap angle adjusting mechanism 4 are all arranged on the machine base 6 and located in the protective cover 7, and the environment simulation box is used for adjusting the temperature and humidity in the protective cover 7. Specifically, in order to facilitate pipe wiping, the protective cover 7 can be partially made of transparent material, and the environment simulation box is a prior art, and its specific structure is not the focus of the present application, so it is not described here. Thus, the working personnel are protected by the protective cover 7, and the transmission belt 11 is prevented from flying out and hurting people after breakage, and further, through the arrangement of the environment simulation box, the temperature and humidity in the protective cover 7 can be adjusted to simulate the temperature and humidity of the belt pulley 5 in the actual working condition for testing, thereby improving the functionality of the testing machine.

[0050] The preferred embodiments of the present application have been described above, but the present application is not limited to the above-mentioned embodiments, and various modifications and changes can be made by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A pulley fatigue testing machine characterized by, The utility model relates to a kind of speed-adjusting mechanism and load-adjusting mechanism, comprising: Speed-adjusting mechanism (1), the speed-adjusting mechanism (1) includes transmission belt (11), driving wheel (12) being rotated by rotary drive device (13); Load-adjusting mechanism (2), the load-adjusting mechanism (2) includes overturning seat (22) being transversely driven by transverse moving drive device (21), two guide seats (23) that guide rod (24) is respectively transversely slidably connected, one end of the overturning seat (22) is set as large end (221) close to the driving wheel (12), the other end is set as small end (222), the outer diameter of the large end (221) is greater than the outer diameter of the small end (222), the facing side of two guide seats (23) is adaptively embedded with the overturning seat (22) to form overturning area (231), the overturning area (231) corresponds to the large end (221) of the overturning seat (22), the overturning seat (22) and two guide seats (23) are locked or unlocked by locking mechanism (3), the upper and lower sides of the overturning seat (22) are respectively provided with single shaft (223) and double shaft (224), the single shaft (223) is used to install single pulley (5), the double shaft (224) is used to install two pulleys (5), the double shaft (224) is provided with movable shaft (225) for installing first wrap angle wheel (41) and is transversely arranged, the transmission belt (11) is used to sleeve connect the driving wheel (12) and the pulley (5), or the transmission belt (11) is used to sleeve connect the driving wheel (12), two pulleys (5) and the first wrap angle wheel (41);When the overturning seat (22) is transversely removed from two guide seats (23) to small end (222) in overturning area (231) after the locking mechanism (3) is unlocked, the overturning seat (22) can be overturned up and down, after being overturned up and down, the overturning seat (22) is transversely reset and is embedded with two guide seats (23) and is locked by the locking mechanism (3).

2. A belt fatigue testing machine as claimed in claim 1, wherein The transverse moving drive device (21) includes transverse moving screw rod (211) being driven by motor, the overturning seat (22) is screwed and sleeve set on the transverse moving screw rod (211), the large end (221) of the overturning seat (22) is provided with telescopic and respectively corresponding two guide seats (23) of butt joint rod (226), two guide seats (23) are respectively recessed and provided with butt joint groove (232) corresponding to two butt joint rods (226);After the overturning seat (22) is overturned up and down, two butt joint rods (226) are extended and butt joint two butt joint grooves (232), the transverse moving screw rod (211) drives the overturning seat (22) to transversely reset.

3. A belt fatigue testing machine as claimed in claim 2, wherein Part of the transverse moving screw rod (211) is provided with a clamped part (2111) without thread, one end of the two butt rods (226) is respectively provided with a pushing part (2261), the turnover seat (22) is provided with two clamping parts (228) connected with reset springs (227) and longitudinally sliding, the proximal end of the two clamping parts (228) is respectively formed with a clamping part (2281) for limiting the clamping of the clamped part (2111), and the distal end is respectively corresponding to the two pushing parts (2261), the two butt rods (226) are respectively driven by butt driving devices (229) and are transversely arranged; when the locking mechanism (3) is unlocked, the turnover seat (22) is transversely separated from the two guide seats (23) to the small end (222) located in the turnover area (231), and the two clamping parts (228) correspond to the clamped part (2111); when the two butt rods (226) are transversely retracted and the two clamping parts (228) are pushed by the pushing parts (2261), the clamped part (2111) is clamped, the turnover seat (22) is turned up and down, the two butt rods (226) are extended to butt the two butt grooves (232), and the two clamping parts (228) are reset to separate from the clamping part (2281) by the pulling force of the reset spring (227).

4. A belt fatigue testing machine as claimed in claim 2, wherein The locking mechanism (3) includes two locking parts (31) longitudinally sliding in the two guide seats (23) and longitudinally moving driven by locking driving devices (32), respectively, the two butt grooves (232) and the side walls of the two butt rods (226) are longitudinally provided with perforations, the opposite sides of the two guide seats (23) are respectively provided with damping interlayers (233), and the damping interlayers (233) are filled with damping parts; after the two butt rods (226) are respectively inserted into the two butt grooves (232), the locking mechanism (3) is locked, and the two locking parts (31) move towards each other to penetrate and lock the butt grooves (232) and the butt rods (226), respectively.

5. A belt fatigue testing machine as claimed in claim 4, wherein The distal end of the two locking parts (31) extends downward to form a pushing part (33), and the locking mechanism (3) further includes two limiting parts (34) rotatingly arranged in the lower part of the two guide seats (23) through torsional springs (35), respectively, the upper end of the limiting part (34) corresponds to the pushing part (33), and the lower end forms an arc-shaped limiting part corresponding to the outer wall of the guide rod (24); when the locking mechanism (3) is unlocked, the two locking parts (31) move in opposite directions and respectively push the lower end of the two limiting parts (34) to swing towards each other by the pushing part (33), and the two limiting parts (34) are limited to fit the outer wall of the guide rod (24); when the locking mechanism (3) is locked, the two locking parts (31) move towards each other to penetrate and lock the butt grooves (232) and the butt rods (226), respectively, and the two limiting parts (34) are reset to separate from the guide rod (24) driven by the torsional springs (35).

6. A belt fatigue testing machine as claimed in claim 5, wherein The distal ends of the two guide rods (24) are respectively recessed and provided with a plurality of limiting grooves (241) arranged in an axial direction, and the two limiting portions correspond to the plurality of limiting grooves (241) respectively, and the two guide seats (23) are transversely limited and slidably arranged.

7. A belt fatigue testing machine as claimed in claim 1, wherein The wrap angle adjusting mechanism (4) comprises the first wrap angle wheel (41) and a plurality of second wrap angle wheels (42), the plurality of second wrap angle wheels (42) are located between the driving wheel (12) and the turnover seat (22) and are driven to move by the adjusting driving device to press the transmission belt (11), and the first wrap angle wheel (41) and the second wrap angle wheel (42) are located outside the transmission belt (11).

8. A belt fatigue testing machine as claimed in claim 7, wherein The number of the second wrap angle wheels (42) is two, and the two second wrap angle wheels (42) are respectively arranged on two driving seats (43) and rotate, the adjusting driving device comprises a first screw rod (44) driven by a motor and used for driving the two driving seats (43) to move longitudinally towards each other or away from each other, and two second screw rods (45) driven by a motor and used for driving the first screw rod (44) to move transversely.

9. A belt fatigue testing machine as claimed in claim 1, wherein The turnover seat (22) is provided with a transversely extending sliding groove (46), a jacking rod (47) transversely screwed through one side of the sliding groove (46), and an adjusting motor (48) for driving the jacking rod (47) to rotate, the movable shaft (225) is transversely slidably connected to the sliding groove (46) through a sliding block, and the jacking rod (47) is rotatably connected to the sliding block at an end portion; the adjusting motor (48) drives the jacking rod (47) to rotate to adjust the screwing depth, thereby driving the sliding block to move transversely to adjust.

10. A belt fatigue testing machine as claimed in claim 7, wherein The machine base (6), the protective cover (7) covering the machine base (6), the environmental simulation box arranged on one side of the machine base (6) and having an output end connected to the protective cover (7), the load adjusting mechanism (2), the rotating speed adjusting mechanism (1), and the wrap angle adjusting mechanism (4) are arranged on the machine base (6) and located in the protective cover (7), and the environmental simulation box is used for adjusting the temperature and humidity in the protective cover (7).

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