Durability and strength test bench for testing gear selecting and shifting execution mechanism

Abstract

The utility model discloses a test bench for testing durability and strength of a gear selecting and shifting execution mechanism. The test bench comprises a base plate; the first load force application assembly is arranged at one end of the bottom plate; the second load force application assembly is arranged at the other end of the bottom plate; one end of the air storage tank is communicated with an air source provided by a workshop total compression pump, and the other end of the air storage tank is communicated with the first load force application assembly and the second load force application assembly; the regulating valve is arranged between the air storage tank and an air source provided by the workshop total compression pump; the supporting frame is arranged between the first load force application assembly and the second load force application assembly and fixedly connected to the bottom plate; the plurality of gear shifting shafts are mounted on the support frame; the multiple gear shifting blocks are arranged in the middle of the gear shifting shaft; the gear shifting shafts and the gear shifting shifting blocks are arranged in a one-to-one correspondence mode. The first load force application assembly and the second load force application assembly are arranged at the two ends of the gear shifting shaft correspondingly.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of automobile parts testing equipment, especially relates to a durability and strength test bench for testing gear selecting and shifting actuator. BACKGROUND

[0002] Heavy trucks still need multi-gear transmission due to the particularity of working conditions, and multi-gear transmission automation control is proposed to meet the automation requirements of new energy vehicles. The stability and reliability of gear selecting and shifting actuator, as the executing component of gear shifting, are the most basic requirements. In order to ensure the stability and reliability of the actuator, relevant tests are necessary, and the test bench is a necessary tool for testing gear selecting and shifting actuator. The existing test tool can only complete a single experimental project, and the test tool needs to be replaced in strength test and durability test, and gear selecting and shifting are tested separately, which takes a long time. UTILITY MODEL CONTENTS

[0003] The utility model aims at providing a durability and strength test bench for testing gear selecting and shifting actuator, which has simple structure, can accurately control air pressure and stably apply load, and can simultaneously perform durability test and strength test, thereby shortening test time.

[0004] The utility model provides a technical scheme:

[0005] A durability and strength test bench for testing gear selecting and shifting actuator, comprising:

[0006] A bottom plate;

[0007] A first load applying assembly arranged at one end of the bottom plate;

[0008] A second load applying assembly arranged at the other end of the bottom plate;

[0009] A gas storage tank, one end of which is in communication with a gas source provided by a workshop total compression pump, and the other end of which is in communication with the first load applying assembly and the second load applying assembly;

[0010] An adjusting valve arranged between the gas storage tank and the gas source provided by the workshop total compression pump, used for adjusting the pressure size, thereby changing the load output force size;

[0011] A support frame arranged between the first load applying assembly and the second load applying assembly and fixedly connected to the bottom plate;

[0012] A plurality of gear shifting shafts installed on the support frame;

[0013] A plurality of gear shifting blocks, the upper surfaces of which are provided with grooves for inserting the shifting heads of gear selecting and shifting actuators; the gear shifting blocks are arranged in the middle of the gear shifting shafts;

[0014] The shift shafts are arranged in one-to-one correspondence with the shift knobs; the first load force applying assembly and the second load force applying assembly are arranged at two ends of the shift shafts, respectively.

[0015] Preferably, the load force applying assemblies each comprise:

[0016] a cylinder, a cylinder body end of which is in communication with the other end of the gas storage tank;

[0017] two guide seats, which are arranged at two sides of the cylinder, respectively;

[0018] two guide rods, which are arranged in the guide seats in one-to-one correspondence with the guide seats; one end of the guide rod penetrates through the guide seat and is provided with a limiting plate at the end head;

[0019] a force applying top plate, one surface of which is fixedly connected with the other end of the guide rod and the piston rod end of the cylinder, and the other surface of which is in contact with the end head of the shift shaft.

[0020] Preferably, one end of the gas storage tank is in communication with a gas source provided by the general compression pump of the workshop through a first gas pipe; the adjusting valve is arranged on the first gas pipe; and the cylinder body end of the cylinder is in communication with the other end of the gas storage tank through a second gas pipe.

[0021] Preferably, the number of the shift shafts and the shift knobs is four.

[0022] Preferably, the shift shaft is provided with a limiting groove near the position in contact with the first load force applying assembly.

[0023] Preferably, the support frame comprises:

[0024] a top plate, a surface of which is provided with a plurality of mounting holes for mounting the selected shift executing mechanism;

[0025] two first support plates, which are arranged at two ends of the top plate, respectively; the two ends of the first support plate are fixedly connected with the top plate and the bottom plate, respectively; the shift shaft penetrates through the first support plate and is in contact with the force applying top plate;

[0026] a second support plate, which is supported at the limiting groove and is fixedly mounted on the bottom plate.

[0027] The application has the advantages that the test selected shift executing mechanism durability and strength test bench provided by the application has simple structure, can accurately control air pressure and stably apply load, simultaneously performs durability test and strength test, and shortens test time. BRIEF DESCRIPTION OF DRAWINGS

[0028] Figure 1The application is applied to the durability and strength test bench for testing gear selecting and shifting actuator.

[0029] Figure 2 The application is applied to the durability and strength test bench for testing gear selecting and shifting actuator.

[0030] Figure 3 The application is applied to the durability and strength test bench for testing gear selecting and shifting actuator.

[0031] Figure 4 The application is applied to the durability and strength test bench for testing gear selecting and shifting actuator.

[0032] Figure 5 The application is applied to the durability and strength test bench for testing gear selecting and shifting actuator. Specific implementation

[0033] The application is applied to the durability and strength test bench for testing gear selecting and shifting actuator.

[0034] As shown in the application, the application provides a durability and strength test bench for testing gear selecting and shifting actuator. Figures 1-2 The application is applied to the durability and strength test bench for testing gear selecting and shifting actuator.

[0035] The load force applying assembly comprises: a first load force applying assembly arranged at one end of the bottom plate 210; a second load force applying assembly arranged at the other end of the bottom plate 210; the first load force applying assembly and the second load force applying assembly realize precise force applying; a gas storage tank 120, one end of which is communicated with a gas source provided by a workshop total compression pump through a first gas pipe 131, and the other end of which is communicated with the first load force applying assembly and the second load force applying assembly through a second gas pipe 132, so as to ensure the stability of gas pressure; an adjusting valve 110 arranged on the first gas pipe 131 between the gas storage tank 120 and the gas source provided by the workshop total compression pump, used for adjusting the pressure size, so as to change the size of load output force, and can adapt to various requirements; wherein the load force applying assembly comprises: a cylinder, a cylinder body end of which is communicated with the other end of the gas storage tank 120; two guide seats arranged at two sides of the cylinder respectively; two guide rods corresponding to the guide seats and arranged in the guide seats; one end of the guide rod penetrates through the guide seat, and a limiting plate is arranged at the end head, used for limiting the moving distance of the guide rod; a force applying top plate, one side of which is fixedly connected with the other end of the guide rod and a piston rod end of the cylinder; the force applying top plate is pushed by the piston rod end of the cylinder, so as to provide required load force for the gear selecting and shifting actuator, and the guide rod is matched with the guide seat, so as to ensure that the force applying top plate does not deflect in the movement process.

[0036] The serial action table mechanism includes: a base plate 210; a support frame 220, which is disposed between the first load applying component and the second load applying component and is fixedly connected to the base plate 210; multiple shift shafts 240, which are mounted on the support frame 220; multiple shift levers 230, each with a groove on its upper surface for inserting a shift head of the shifting mechanism; the shift levers 230 are disposed in the middle of the shift shafts 240; wherein the shift shafts 240 and the shift levers 230 are disposed in a one-to-one correspondence and fixedly connected; the first load applying component and the second load applying component are respectively disposed at both ends of the shift shafts 240, and the ends of the shift shafts 240 are in contact with the other side of the force-applying top plate.

[0037] like Figure 3 As shown, the first load-applying component includes: a first cylinder 141, two first guide seats 142, two first guide rods 143, a first force-applying top plate 144, and a first limiting plate 145; the second load-applying component includes: a second cylinder 151, two second guide seats 152, two second guide rods 153, a second force-applying top plate 154, and a second limiting plate 155; wherein, the cylinder body end 141b of the first cylinder 141 and the cylinder body end 151b of the second cylinder 151 are connected to the air storage tank 120 through the second air pipe 132. Since the volume of the air storage tank 120 is larger than the volume of the first cylinder 141 and the second cylinder 151, the air storage tank 120... The 0 can balance the compressed air in the first cylinder 141 and the second cylinder 151 when the piston is pushed back, so that the change in gas pressure in the first cylinder 141 and the second cylinder 151 can be ignored, thereby ensuring that the load output force of the first cylinder 141 and the second cylinder 151 remains almost constant; the piston rod end 141a of the first cylinder 141 is fixedly connected to one side of the first force-applying top plate 144, and the piston rod end 151a of the second cylinder 151 is fixedly connected to one side of the second force-applying top plate 154; the first force-applying top plate 144 and the second force-applying top plate 154 are disposed at both ends of the shift shaft 240 and are in contact with the shift shaft 240.

[0038] The first load force applying assembly and the second load force applying assembly are structurally identical, and the working mode of the load force applying assembly is described by taking the first load force applying assembly as an example. Before the durability and strength test of the shift execution mechanism is performed, the air pressure is adjusted by the adjusting valve 110 to ensure that the first air cylinder 141 outputs the required load output force. When the shift shaft 240 moves towards the first air cylinder 141, the shift shaft 240 pushes the first force applying top plate 144 to move towards the first air cylinder 141, and the piston rod end 141a of the first air cylinder 141 moves inward to compress the air in the first air cylinder 141 to a certain pressure adjusted by the adjusting valve 110. The compressed air is balanced by the air tank 120, so that the air pressure change value can be ignored, and the load output force of the first air cylinder 141 remains unchanged. At the same time, the first guide rod 143 and the first guide seat 142 cooperate to maintain the moving direction of the first force applying top plate 144 without deviation, prevent deviation and jamming, ensure that the load force accurately acts vertically on the shift execution mechanism, and improve the test reliability and repeatability. When the shift shaft 240 moves towards the second air cylinder 151, the piston rod end 141a of the first air cylinder 141 pushes the first force applying top plate 144 to move towards the second air cylinder 151, and the first limiting plate 145 limits the movement distance of the first guide rod 143. When the first limiting plate 145 contacts the first guide seat 142, the first guide rod 143 stops moving, and the first force applying top plate 144 also stops moving, completing a simulation action cycle and providing a stable load for the strength test of the shift execution mechanism.

[0039] As shown in Figures 4-5 In order to be close to the actual number of gears of the gearbox, the number of the shift shafts 240 and the shift knobs 230 is four. The four shift shafts 240 are respectively a first shift shaft 241, a second shift shaft 242, a third shift shaft 243, and a fourth shift shaft 244. Each of the shift shafts 240 is provided with a limiting groove 240a near the position where it contacts the first force applying top plate 144. The two ends of the shift shaft 240 contact the first force applying top plate 144 and the second force applying top plate 154, respectively, serving as a power transmission hub to convert the action of the shift knob 230 into a force acting on the force applying top plate, simulating the actual shift force. The four shift knobs 230 are respectively a first shift knob 231, a second shift knob 232, a third shift knob 233, and a fourth shift knob 234. Each of the shift knobs 230 is provided with a groove for inserting the knob of the shift execution mechanism. The grooves are respectively a first groove 235, a second groove 236, a third groove 237, and a fourth groove 238. The shift shaft 240, the shift knob 230, and the groove are one-to-one corresponding, and the shift knob 230 is fixedly connected with the shift shaft 240.

[0040] The support frame 220 comprises: a top plate 221, the surface of which is provided with a plurality of mounting holes 224 for mounting the selection and shift execution mechanism; two first support plates 222, which are respectively arranged at the two ends of the top plate 221; the two ends of the first support plate 222 are fixedly connected with the top plate 221 and the bottom plate 210 respectively; the two ends of the shift shaft 240 pass through the first support plate 222 and contact the force applying top plate; a second support plate 223, which is supported at the limiting groove 240a and fixedly mounted on the bottom plate 210, cooperates with the second support plate 223 through the limiting groove 240a to prevent the shift shaft 240 from rotating and ensure the distance between adjacent shift blocks 230.

[0041] When the test bench is assembled and no test is performed, the piston rod end 151a of the first cylinder 141 and the second cylinder 151 pushes the first force applying top plate 144 and the second force applying top plate 154, the first limiting plate 145 and the second limiting plate 155 play a limiting role, the first force applying top plate 144 and the second force applying top plate 154 reach the maximum moving distance, the two ends of the shift shaft 240 contact the first force applying top plate 144 and the second force applying top plate 154, and the two ends of the shift shaft 240 are guaranteed not to be forced at this time.

[0042] When the test is carried out, the selected gear shifting actuator is installed on the support frame 220, the knob of the selected gear shifting actuator is inserted into the groove of the gear shifting knob 230, the knob of the selected gear shifting actuator can move back and forth in the groove in the direction from the first groove 235 to the fourth groove 238, the knob of the selected gear shifting actuator selects any one of the gear shifting knobs 230 to be actuated, and the actuation of the selected gear shifting knob 230 drives the corresponding gear shifting shaft 240 to move, drives the load force applying assembly to simulate the gear shifting force receiving process, and accurately reproduces the actual working condition gear selection and gear shifting action sequence through the cooperation of multiple components. Taking the movement of the knob of the selected gear shifting actuator in the direction of the first load force applying assembly as an example, the knob of the selected gear shifting actuator is inserted into the first groove 235, actuates the first gear shifting knob 231, the first gear shifting knob 231 drives the first gear shifting shaft 241 to move in the direction of the first load force applying assembly, pushes the first force applying top plate 144 to move, and makes the piston rod end 141a of the first air cylinder 141 move towards the cylinder body end 141b, compresses the air in the first air cylinder 141 which is adjusted to a certain pressure through the regulating valve 110, and the compressed air is balanced through the air tank 120, so that the air pressure change value can be ignored, the load output force of the first air cylinder 141 is unchanged, the first guide rod cooperates with the first guide seat 142 to keep the movement direction of the first force applying top plate 144 from being deviated, and the gear shifting force receiving process is simulated; the knob of the selected gear shifting actuator returns the first gear shifting knob 231, the first gear shifting knob 231 drives the first gear shifting shaft 241 to move in the direction of the second load force applying assembly, and stops moving when the first gear shifting shaft 241 returns to the original position, the piston rod end 141a of the first air cylinder 141 pushes the first force applying top plate 144 to move in the direction of the second load force applying assembly, the first guide rod 143 stops moving when the first limiting plate 145 contacts the first guide seat 142, the first force applying top plate 144 simultaneously stops moving, and a single cycle of strength test is completed; the knob of the selected gear shifting actuator repeatedly selects gears and actuates different gear shifting knobs 230 to realize the gear selection-gear shifting-gear selection cycle test and comprehensively examine the durability and strength performance of the actuator.

[0043] In the high and low temperature test, the adjusting valve 110 and the gas tank 120 can be placed outside the high and low temperature test cabinet, and the gas pressure is maintained stable by the gas connection. The external gas source is adjusted by the adjusting valve 110 through the first gas pipe 131, and then is sent to the gas tank 120 for pressure stabilization, and then is sent to the load force applying assembly through the second gas pipe 132, so that the load output force required by the load mechanism is provided, the load output force is constant under extreme conditions, the application boundary of the test bench is expanded, the key test means for the environmental performance research and optimization design of the actuator is provided, and the complex working condition test demand of the automobile parts is met.

[0044] The durability and strength test bench for testing gear selection and shifting actuator provided by the utility model has simple structure, can accurately control air pressure and stably apply load, simultaneously performs durability test and strength test, shortens test time, adopts the mode of cylinder load combined with pressure regulating valve and gas tank, realizes high-precision dynamic adjustment of load force, air pressure is adjusted simply and flexibly, load accuracy far exceeds traditional tooling, load force value can be accurately set according to requirements in different test stages, the strong pressure stabilization function of the gas tank ensures that the cylinder load output force is stable and constant during the whole test, is not disturbed by external factors, provides stable test conditions for performance evaluation of the actuator, and effectively improves test data accuracy and repeatability, gear selection and shifting actions are tested in series, gear selection and shifting operation sequences in actual vehicle driving are accurately reproduced, test and actual working condition fitting degree is greatly improved, gear selection and shifting can be tested in series, are more suitable for actual use working condition, and the reliability of gear selection and shifting is tested, the gear selection and shifting actuator is tested in durability and strength under simulated real working condition, the obtained performance data is real and reliable, potential performance problems under complex working condition are deeply excavated, the design of research and development personnel is accurately optimized, product quality and reliability are improved, and vehicle actual operation failure risk is reduced.

[0045] Although the embodiments of the utility model have been disclosed as above, it is not limited to the application listed in the specification and the embodiments, it can be fully applied to various fields suitable for the utility model, and other modifications can be easily realized by those skilled in the art, therefore, the utility model is not limited to specific details and the figures shown and described herein without departing from the general concept defined by the claims and equivalent scope.

Claims

1. A durability and strength test bench for testing gear shifting actuators, characterized in that, include: Base plate; The first load-applying component is disposed at one end of the base plate; The second load-applying component is located at the other end of the base plate; The gas storage tank has one end connected to the gas source provided by the workshop's main compression pump, and the other end connected to the first load-applying component and the second load-applying component. A regulating valve is installed between the air storage tank and the air source provided by the main compressor pump in the workshop, and is used to regulate the pressure, thereby changing the magnitude of the load output force; A support frame is disposed between the first load-applying component and the second load-applying component and is fixedly connected to the base plate; Multiple shift shafts are mounted on the support frame; Multiple shift paddles, each with a groove on its upper surface for inserting a shift head of a shifting mechanism; the shift paddles are located in the middle of the shift shaft; The shift shaft and the shift lever are respectively arranged in a one-to-one correspondence; the first load applying component and the second load applying component are respectively arranged at both ends of the shift shaft.

2. The durability and strength test bench for testing gear shifting actuators according to claim 1, characterized in that, The load-applying components all include: A cylinder, the cylinder body of which is connected to the other end of the gas storage tank; Two guide seats are respectively disposed on both sides of the cylinder; Two guide rods are provided, each corresponding to a guide seat and disposed within the guide seat; one end of each guide rod passes through the guide seat and a limiting plate is provided at the end. The force-applying top plate has one side fixedly connected to the other end of the guide rod and the piston rod end of the cylinder, and the other side in contact with the end of the shift shaft.

3. The durability and strength test bench for testing gear shifting actuators according to claim 2, characterized in that, One end of the air storage tank is connected to the air source provided by the main compressor pump in the workshop through a first air pipe; the regulating valve is installed on the first air pipe; the cylinder body end of the cylinder is connected to the other end of the air storage tank through a second air pipe.

4. The durability and strength test bench for testing gear shifting actuators according to claim 1, characterized in that, The number of the shift shaft and the shift paddle are both four.

5. The durability and strength test bench for testing gear shifting actuators according to claim 2, characterized in that, The shift shaft is provided with a limiting groove near the position where it contacts the first load-applying component.

6. The durability and strength test bench for testing gear shifting actuators according to claim 5, characterized in that, The support frame includes: The top plate has multiple mounting holes on its surface for mounting the gear shifting actuator; Two first support plates are respectively disposed at both ends of the top plate; the two ends of the first support plates are fixedly connected to the top plate and the bottom plate respectively; the shift shaft passes through the first support plates and contacts the force-applying top plate; The second support plate is supported at the limiting groove and fixedly installed on the base plate.

Images