Truck handle fatigue test device

Abstract

The invention belongs to the technical field of handle testing, and particularly relates to a truck handle fatigue testing device which comprises a testing table and a protective cover arranged above the testing table, a testing plate is installed above the testing table, and a clamp cavity used for clamping a handle is formed in the testing plate; a handle clamping mechanism for clamping a handle of the handle is arranged right above the test plate, a swing lifting mechanism is connected above the handle clamping mechanism, and the swing lifting mechanism is used for driving the handle clamping mechanism to perform lifting motion and semicircular swing motion; according to the invention, the handle clamped by the test plate can be repeatedly pulled to open and close at different angles, so that the accuracy and efficiency of fatigue test of the truck handle after production can be improved.

Description

Technical Field

[0001] The invention belongs to the technical field of handle testing, and in particular relates to a fatigue testing device for a truck handle. Background Art

[0002] Specifically, with economic development, people's living standards are constantly improving, and the demand for trucks is increasing. Truck door handles, which are used to open and close truck doors, are installed on the sheet metal parts of truck doors. Truck door handles need to be fatigue tested before leaving the factory. The so-called fatigue test is to repeatedly open and close the truck door handles to determine the fatigue limit of the truck door handles after multiple uses.

[0003] Existing devices for fatigue testing door handles can only perform fatigue testing on the handles by repeatedly opening and closing the handles in a vertical state. However, in actual use, most users do not pull the handles at a vertical angle to open and close the door handles, but instead pull the handles at multiple angles. Therefore, existing fatigue testing devices cannot achieve multiple-angle opening and closing of the handles, making it difficult to perform accurate and efficient fatigue testing on the handles. Summary of the invention

[0004] In order to solve the above technical problems, the present invention is achieved through the following technical solutions:

[0005] The present invention is a fatigue testing device for a truck handle, comprising a test bench and a protective cover arranged above the test bench, a test plate is installed above the test bench, and a clamp cavity for clamping the handle is provided on the test plate;

[0006] A handle clamping mechanism for clamping the handle of the handle is arranged directly above the test plate, and a swing lifting mechanism is connected above the handle clamping mechanism, and the swing lifting mechanism is used to drive the handle clamping mechanism to perform lifting motion and semicircular swing motion.

[0007] Furthermore, the handle clamping mechanism includes a mounting plate, a double-headed double-axis cylinder, a side ear plate, an L-shaped connecting plate and a clamping block. The mounting plate is connected to the swing lifting mechanism, and a double-headed double-axis cylinder is fixed to the middle part of the lower surface of the mounting plate, and the piston rod end faces at both ends of the double-headed double-axis cylinder are connected to side ear plates, and the outer side surfaces of the symmetrical side ear plates are connected to the vertical plates of the L-shaped connecting plate, and the lower surface of the horizontal plate of the symmetrical L-shaped connecting plate is integrally formed with a clamping block, and the corresponding side surfaces of the symmetrical clamping blocks are provided with C-shaped clamping grooves, and the C-shaped clamping grooves are clamped to the handle of the handle.

[0008] Furthermore, the handle clamping mechanism also includes a C-shaped capsule strip, a folded spring sheet and an air duct, the C-shaped capsule strip is installed in the C-shaped clamping groove, and the C-shaped groove of the C-shaped capsule strip is in contact with the handle of the handle, a plurality of folded spring sheets are installed in the C-shaped capsule strip, and an air duct is connected to the wall surface where the C-shaped capsule strip and the C-shaped clamping groove are in contact, and the air duct is arranged in the clamping block.

[0009] Furthermore, the handle clamping mechanism is provided with a disengagement connection component, which includes an electromagnetic strip, an adsorption iron block, a locking bolt, a guide slider, an adsorption guide block and a supporting spring. The lower surface of the mounting plate is provided with a guide slide groove along its length direction, and a segmented electromagnetic strip is insulated and installed in the guide slide groove. The top end of the symmetrical side ear plate is insulated and installed with an adsorption iron block, and the adsorption iron block is inserted upward into the guide slide groove and contacts with the electromagnetic strip. A vertical guide groove is vertically provided on the vertical plate of the L-shaped connecting plate, and a guide slider is slidably provided in the vertical guide groove. The guide slider is connected to the side ear plate by a locking bolt. Limited guide grooves are vertically provided on both side walls of the vertical guide groove, and the electromagnetic strip is also insulated and installed on the vertical groove walls of the limited guide groove. Adsorption guide blocks are insulated and connected to the two side surfaces of the guide slider, and the adsorption guide blocks are slidably inserted into the limited guide groove and contact with the vertically installed electromagnetic strip. The piston rods at both ends of the double-headed double-axis cylinder are detachably and slidably connected to the side ear plates.

[0010] Furthermore, the disconnection assembly also includes an adsorption guide rod and an electromagnetic suction ring. The piston rod end face of the double-headed double-axis cylinder is insulated and installed with an adsorption guide rod, and the adsorption guide rod is slidably inserted into the side ear plate. The side ear plate is insulated and fixed with an electromagnetic suction ring, and the adsorption guide rod is inserted into the electromagnetic suction ring.

[0011] Furthermore, the swing lifting mechanism includes a lifting cylinder, a support plate, a guide rod, a guide sleeve, a turntable and a suspension frame. The bottom end surface of the piston rod of the vertically arranged lifting cylinder is connected to the mounting plate, and the support plate is installed on the lower surface of its cylinder body. The two ends of the support plate are slidably inserted with guide rods through guide sleeves, and the bottom ends of the symmetrical guide rods are connected to the mounting plate. A turntable is fixed at the center of the back side of the cylinder body of the lifting cylinder, and the center of the turntable is connected to the output shaft of a servo motor horizontally fixed by a suspension frame.

[0012] Furthermore, the swing lifting mechanism also includes an arc-shaped guide bar and a suspension block. An inverted T-shaped groove is penetrated through the mounting block on the top of the cylinder body of the lifting cylinder, and the inverted T-shaped groove is slidably sleeved on the arc-shaped guide bar of the inverted T-shaped structure. The top end of the arc-shaped guide bar is suspended and installed on the top of the protective cover through the suspension block.

[0013] Furthermore, a plurality of mounting tubes are arranged on the mounting plate, and a nozzle is detachably mounted in each mounting tube, and the plurality of nozzles are connected to an air pump in the test bench through a gas conduit.

[0014] The present invention has the following beneficial effects:

[0015] 1. The present invention cooperates with the handle clamping mechanism and the swing lifting mechanism. The handle clamping mechanism can clamp and fix the handles of the truck handles at different positions. The swing mechanism drives the handle clamping mechanism to rise or fall vertically, so as to realize the vertical repeated opening and closing of the clamped handles, thereby facilitating the fatigue testing of the truck handles at vertical angles. At the same time, the swing lifting mechanism can drive the handle clamping mechanism to swing to an inclined state, so that the handle clamping mechanism can clamp and fix the handles in an inclined state, thereby facilitating the swing lifting mechanism to repeatedly tilt, pull, open and close the clamped handles, thereby facilitating the repeated pulling, opening and closing of the handles clamped by the test plate at different angles, thereby improving the accuracy and efficiency of fatigue testing of the truck handles after production.

[0016] 2. The present invention arranges a C-shaped capsule strip in the C-shaped clamping groove. When the symmetrical clamping block needs to swing to a tilted state to clamp the handle of the handle, the high-pressure gas in the C-shaped capsule strip is first extracted through the air guide tube, so that the C-shaped capsule strip is in a contracted state and disengaged from the handle of the handle, so that a certain gap is formed between the handle and the C-shaped clamping groove. Then, when the swing lifting mechanism drives the symmetrical clamping block to swing to a tilted state through the mounting plate and other structures, the C-shaped clamping grooves on the symmetrical clamping block will rotate around the handle of the handle, and then the tilted state can be achieved without the need for the clamping block to be detached from the handle, thereby preventing the C-shaped clamping groove of the clamping block from being unable to accurately clamp the handle when the clamping block rotates to a tilted state and then clamps the handle, which will affect the fatigue test of repeatedly pulling and opening and closing the handle of the handle in a tilted state.

[0017] Of course, any product implementing the present invention does not necessarily need to achieve all of the advantages described above at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for describing the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying creative work.

[0019] Figure 1 It is a schematic diagram of the overall structure disclosed in the present invention;

[0020] Figure 2 It is a schematic diagram of the coordination of the handle clamping mechanism and the swing lifting mechanism disclosed in the present invention;

[0021] Figure 3It is a structural schematic diagram of the handle clamping mechanism disclosed in the present invention;

[0022] Figure 4 is a cross-sectional view of the mounting plate disclosed in the present invention;

[0023] Figure 5 is a cross-sectional view of the clamping block disclosed in the present invention;

[0024] Figure 6 The present invention discloses Figure 4 A partial enlarged view of the middle part;

[0025] Figure 7 It is a structural schematic diagram of the swing lifting mechanism disclosed in the present invention.

[0026] In the figure: 1. Test bench;

[0027] 2. Protective cover;

[0028] 3. Test board;

[0029] 4. Handle clamping mechanism; 41. Mounting plate; 411. Guide slide; 42. Double-head double-axis cylinder; 43. Side ear plate; 44. L-shaped connecting plate; 441. Vertical guide groove; 442. Limiting guide groove; 45. Clamping block; 451. C-shaped clamping groove; 46. C-shaped capsule strip; 47. Folding spring; 48. Air guide tube;

[0030] 5. Disconnection assembly; 51. Electromagnetic strip; 52. Adsorption iron block; 53. Locking bolt; 54. Guide slide block; 55. Adsorption guide block; 56. Support spring; 57. Adsorption guide rod; 58. Electromagnetic suction ring;

[0031] 6. Swing lifting mechanism; 61. Lifting cylinder; 611. Inverted T-slot; 62. Support plate; 63. Guide rod; 64. Guide sleeve; 65. Turntable; 66. Suspension frame; 67. Arc guide bar; 68. Suspension block;

[0032] 7. Install the cylinder;

[0033] 8. Nozzle. DETAILED DESCRIPTION

[0034] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0035] In the description of the present invention, it should be understood that the terms "opening", "upper", "lower", "thickness", "top", "middle", "length", "inside", "all around" and the like indicating orientation or positional relationship are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the components or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0036] See also Figure 1-Figure 7 As shown, the present invention is a fatigue test device for a truck handle, comprising a test bench 1, and a protective cover 2 arranged above the test bench 1, a test plate 3 is installed above the test bench 1, and a clamp cavity for clamping the handle is opened on the test plate 3;

[0037] A handle clamping mechanism 4 for clamping the handle of the handle is arranged directly above the test plate 3, and a swing lifting mechanism 6 is connected above the handle clamping mechanism 4, and the swing lifting mechanism 6 is used to drive the handle clamping mechanism 4 to perform lifting motion and semicircular swing motion;

[0038] The present invention cooperates with the handle clamping mechanism 4 and the swing lifting mechanism 6. When it is necessary to perform fatigue test on the produced truck handle, the protective door on the transparent protective cover 2 is first opened, and then the handle to be tested is clamped into the clamp cavity opened on the test plate 3, so that the handle to be tested can be clamped and fixed on the test plate 3, and then the swing lifting mechanism 6 is operated to drive the handle clamping mechanism 4 to descend to the clamped handle, and then the handle clamping mechanism 4 clamps and fixes the handle of the handle, and then the operator controls the swing mechanism to drive the handle clamping mechanism 4 to rise or fall vertically through the operation panel, so as to realize the vertical repeated opening and closing of the clamped handle, thereby facilitating the fatigue test of the truck handle at a vertical angle. Operation; when it is necessary to pull the handle obliquely to realize repeated opening and closing tests at oblique angles, the handle clamping mechanism 4 can be driven to swing to an inclined state through the swing lifting mechanism 6, so that the handle of the handle is clamped and fixed in an inclined state, thereby facilitating the swing lifting mechanism 6 to repeatedly tilt, pull and open and close the clamped handle, thereby facilitating the repeated pulling and opening and closing of the handle clamped by the test plate 3 at different angles, thereby improving the accuracy and efficiency of fatigue testing of truck handles after production, and when the handle fatigue test is completed, the operator opens the protective door on the protective cover 2, removes the tested handle from the test plate 3, thereby facilitating the fatigue test operation on the next handle to be tested.

[0039] In the embodiment of the present invention, the handle clamping mechanism 4 includes a mounting plate 41, a double-headed double-axis cylinder 42, a side ear plate 43, an L-shaped connecting plate 44 and a clamping block 45. The mounting plate 41 is connected to the swing lifting mechanism 6, and a double-headed double-axis cylinder 42 is fixed to the middle of the lower surface of the mounting plate 41. The piston rod end faces of both ends of the double-headed double-axis cylinder 42 are connected to the side ear plates 43, and the outer side surfaces of the symmetrical side ear plates 43 are connected to the vertical plates of the L-shaped connecting plate 44. The lower surface of the horizontal plate of the symmetrical L-shaped connecting plate 44 is integrally formed with a clamping block 45, and the corresponding side surfaces of the symmetrical clamping block 45 are provided with a C-shaped clamping groove 451, and the C-shaped clamping groove 451 is clamped to the handle of the handle;

[0040] Specifically, after the truck handle to be tested is clamped into the fixture cavity of the test plate 3, and the protective door is closed on the protective cover 2, the piston rods on both sides of the double-headed double-axis cylinder 42 are first controlled to extend, so that the symmetrical clamping blocks 45 are driven to separate and slide away from each other through the side ear plates 43 and the L-shaped connecting plates 44, and then the mounting plate 41 is driven to descend through the swing lifting mechanism 6, so that the opened clamping blocks 45 will be located on both sides of the handle in the middle of the handle, and the C-shaped clamping grooves 451 opened on the clamping blocks 45 are located on the sides of the handle, and then the piston rods of the double-headed double-axis cylinder 42 are controlled to contract, so that the symmetrical clamping blocks 45 are controlled to move closer to each other, thereby The C-shaped clamping groove 451 will be clamped on the handle of the handle, and then when the swing lifting mechanism 6 drives the mounting plate 41 to repeatedly lift and lower, the symmetrical clamping block 45 will drive the clamped handle to repeatedly open and close on the handle, thereby facilitating the fatigue test of the handle; when the handle fatigue test is completed, the piston rod of the double-headed double-axis cylinder 42 is extended, so that it drives the C-shaped clamping groove 451 of the symmetrical clamping block 45 to disengage from the handle of the handle, and then the swing lifting mechanism 6 drives the mounting plate 41 to rise, so that it drives the symmetrical clamping block 45 to disengage from the handle, thereby facilitating the removal and replacement of the tested handle from the test plate 3.

[0041] In the embodiment of the present invention, the handle clamping mechanism 4 further includes a C-shaped capsule strip 46, a folded spring sheet 47 and an air guide tube 48. The C-shaped capsule strip 46 is installed in the C-shaped clamping groove 451, and the C-shaped groove of the C-shaped capsule strip 46 contacts the handle of the handle. A plurality of folded spring sheets 47 are installed in the C-shaped capsule strip 46, and the wall surface where the C-shaped capsule strip 46 and the C-shaped clamping groove 451 are in contact is connected with the air guide tube 48, and the air guide tube 48 is arranged in the clamping block 45.

[0042] Specifically, in order to increase the stability of the symmetrical clamping block 45 in clamping the handle of the handle, especially when the symmetrical clamping block 45 is in an inclined state to clamp the handle, therefore, when the C-clamping groove 451 is fitted to the handle, the C-shaped capsule strip 46 will contact the surface of the handle, and as the clamping force of the symmetrical clamping block 45 continues to increase, the folded spring piece 47 in the C-shaped capsule strip 46 will be compressed. At the same time, the operator can pass high-pressure gas into the C-shaped capsule strip 46 through the air guide tube 48 according to the thickness of the handle on the handle to be tested, so that the C-shaped capsule strip 46 can expand and clamp on the handle of the handle, so that the symmetrical clamping block 45 can clamp the handle of the handle stably and safely, and prevent the clamping block 45 from detaching from the handle of the handle when the handle is repeatedly pulled to open and close, which may easily cause safety hazards; and when the symmetrical clamping block 45 needs to swing in an inclined state to clamp the handle of the handle, at this time, the air guide tube 48 is first used to release the air in the C-shaped capsule strip 46. The high-pressure gas is extracted, so that the C-shaped capsule strip 46 is in a contracted state and disengages from the handle of the handle, so that there is a certain gap between the handle and the C-shaped clamping groove 451, and then when the swing lifting mechanism 6 drives the symmetrical clamping block 45 to swing to an inclined state through the mounting plate 41 and other structures, the C-shaped clamping groove 451 on the symmetrical clamping block 45 will rotate around the handle of the handle, and then, without the need for the clamping block 45 to be detached from the handle, its inclined state can be achieved, to prevent the clamping block 45 from rotating to an inclined state and then clamping the handle, so that the C-shaped clamping groove 451 of the clamping block 45 cannot be accurately clamped to the handle, which will affect the fatigue test of repeatedly pulling the handle of the handle in the inclined state; when the clamping block 45 rotates to an inclined state, high-pressure gas is introduced into the C-shaped capsule strip 46 through the air guide pipe 48, so that it expands and fits to the handle, so that the clamping block 45 can clamp and fix the handle of the handle more safely when it rotates to an inclined state.

[0043] In the embodiment of the present invention, the handle clamping mechanism 4 is provided with a disconnection assembly 5, and the disconnection assembly 5 includes an electromagnetic strip 51, an adsorption iron block 52, a locking bolt 53, a guide slider 54, an adsorption guide block 55 and a support spring 56. The lower surface of the mounting plate 41 is provided with a guide slot 411 along its length direction, and the guide slot 411 is insulated and installed with a segmented electromagnetic strip 51. The top end of the symmetrical side ear plate 43 is insulated and installed with an adsorption iron block 52, and the adsorption iron block 52 is inserted upward into the guide slot 411 to contact the electromagnetic strip 51. The vertical plate of the L-shaped connecting plate 44 is provided with a guide slot 411. A vertical guide groove 441 is vertically provided, and a guide slider 54 is slidably provided in the vertical guide groove 441, and the guide slider 54 is connected to the side ear plate 43 by a locking bolt 53, and the two side walls of the vertical guide groove 441 are vertically provided with a limited guide groove 442, and an electromagnetic strip 51 is also insulated and installed on the vertical groove wall of the limited guide groove 442, and the two side surfaces of the guide slider 54 are insulated and connected with adsorption guide blocks 55, and the adsorption guide blocks 55 are slidably inserted into the limited guide groove 442 and contact the vertically installed electromagnetic strip 51, and the piston rods at the two ends of the double-headed double-axis cylinder 42 are detachably and slidably connected to the side ear plate 43;

[0044] Specifically, when fatigue testing is required for different types of truck handles, for example, fatigue testing is required for a truck handle on the side of the handle near the handle recess, the handle of this type is clamped to the test plate 3, and then the position between the clamped handle and the symmetrical clamping blocks 45 is adjusted. When the mounting plate 41 drives the symmetrical clamping blocks 45 to descend to the handle, the symmetrical clamping blocks 45 can be controlled to move away from each other, and the front clamping blocks 45 correspond to the handle recess, and then the electromagnetic length vertically installed in the vertical guide groove 441 provided on the rear L-shaped connecting plate 44 is controlled. When the strip 51 is powered off, it loses its magnetic adsorption force, causing it to be separated from the adsorption fixation to the adsorption knife block, and the electromagnetic strip 51 installed at the rear section of the control guide slide 411 is powered on and has a magnetic adsorption force, causing it to adsorb and fix the corresponding adsorption iron block 52. At this time, the piston rod at the rear end of the double-headed double-axis cylinder 42 is also separated from the fixed connection with the side ear plate 43, so that the rear side ear plate 43 is in a fixed state, and when the mounting plate 41 continues to drive the front clamping block 45 to descend into the recessed groove of the handle, at this time, the vertical plate of the rear L-shaped connecting plate 44 will be on the outside of the side ear plate 43. The side surfaces move upward relatively, and then the guide slider 54 will slide in the vertical guide groove 441, and the adsorption guide block 55 will slide in the limit guide groove 442, and at this time the support spring 56 will be compressed in the vertical guide groove 441, and when the C-shaped clamping groove 451 of the front clamping block 45 is aligned with the handle designed to fit the side, the piston rod of the double-headed double-axis cylinder 42 will be retracted, and the front clamping block 45 will be driven by the piston rod to approach the handle, and the C-shaped clamping groove 451 will fit onto the handle, and then the inflation of the C-shaped capsule strip 46 will be aligned with the non-central part of the handle. The handle at the position is clamped and fixed, and the piston rod at the rear end of the double-headed double-axis cylinder 42 is disconnected from the side ear plate 43 at the rear side at this time, and the side ear plate 43 is adsorbed and fixed by the adsorption iron block 52 at the upper end and the electromagnetic strip 51, and then reciprocates up and down on the mounting plate 41, so that the front side and the single clamping block 45 can drive the clamped handle to reciprocate up and down to open and close, and the clamping block 45 at the rear side will not be aligned to produce interference, so that the fatigue test device of the present invention can realize the reciprocating opening and closing fatigue test of different types of truck handles;

[0045] When the symmetrical clamping blocks 45 need to work synchronously to clamp and fix the handle located in the middle of the handle, the piston rod of the double-headed double-axis cylinder 42 is first controlled to extend to its maximum extension state, and the piston rod located at the rear side is fixedly connected to the vertical side ear plate 43, and the insulated electromagnetic strip 51 located in the guide slot 411 is in a power-off state, so that the adsorption iron block 52 can slide normally in the guide slot 411, and when the mounting plate 41 drives the clamping block 45 to rise and detach from the handle, at this time The guide slider 54 in the L-shaped connecting plate 44 on the rear side will slide in the vertical guide groove 441 under the elastic restoring force of the support spring 56, and at this time the guide slider 54 will be located at the top of the vertical guide groove 441, and the adsorption guide block 55 will be adsorbed and fixed by the electromagnetic strip 51 energized in the limiting guide groove 442, so that the distance between the bottom end of the side ear plate 43 and the clamping block 45 is maximized, so that the front and rear symmetrical clamping blocks 45 are in the same horizontal plane to clamp and fix the handle located in the middle of the truck handle.

[0046] In the embodiment of the present invention, the disconnection assembly 5 further includes an adsorption guide rod 57 and an electromagnetic suction ring 58. The piston rod end surface of the double-headed double-axis cylinder 42 is insulated and installed with the adsorption guide rod 57, and the adsorption guide rod 57 is slidably inserted into the side ear plate 43. The electromagnetic suction ring 58 is insulated and fixed on the side ear plate 43, and the adsorption guide rod 57 is inserted into the electromagnetic suction ring 58.

[0047] Specifically, when the piston rod of the double-headed double-axis cylinder 42 needs to be disconnected from the side ear plate 43, the electromagnetic block controlling the inner ring surface of the electromagnetic suction ring 58 is de-energized, so that it can adsorb and fix the metal adsorption guide rod 57, so that when the piston rod of the double-headed double-axis cylinder 42 is extended, the adsorption guide rod 57 can only slide freely in the electromagnetic suction ring 58; and when the electromagnetic block on the inner ring surface of the electromagnetic suction ring 58 is energized, the adsorption guide rod 57 will be adsorbed and fixed, and then the extension and contraction of the piston rod will drive the side ear plate 43 and the clamping block 45 to slide and clamp the handle.

[0048] In the embodiment of the present invention, the swing lifting mechanism 6 includes a lifting cylinder 61, a support plate 62, a guide rod 63, a guide sleeve 64, a turntable 65 and a suspension frame 66. The bottom end surface of the piston rod of the vertically arranged lifting cylinder 61 is connected to the mounting plate 41, and the lower surface of its cylinder body is installed with a support plate 62. The two ends of the support plate 62 are slidably plugged with guide rods 63 through guide sleeves 64, and the bottom ends of the symmetrical guide rods 63 are connected to the mounting plate 41. A turntable 65 is fixed at the center of the back of the cylinder body of the lifting cylinder 61, and the center of the turntable 65 is connected to the output shaft of the servo motor horizontally fixed through the suspension frame 66.

[0049] Specifically, the extension and retraction of the piston rod of the lifting cylinder 61 will drive the mounting plate 41 to rise and fall, and the guide rod 63 is slidably inserted into the support plate 62 through the guide sleeve 64, thereby guiding the lifting and lowering of the lifting mounting plate 41. When the lifting cylinder 61 needs to swing at a certain tilt angle, the servo motor on the suspension frame 66 is controlled to work so that its output shaft drives the turntable 65 to rotate, and then the lifting cylinder 61 will swing at a certain angle, so that the symmetrical clamping block 45 will clamp the handle in an inclined state, and then the piston rod of the inclined lifting cylinder 61 will extend and retract, which will drive the added handle to tilt and reciprocate through the mounting plate 41 to perform the opening and closing operation.

[0050] In the embodiment of the present invention, the swing lifting mechanism 6 further comprises an arc-shaped guide bar 67 and a suspension block 68. An inverted T-shaped groove 611 is formed through the mounting block at the top of the cylinder body of the lifting cylinder 61, and the inverted T-shaped groove 611 is slidably sleeved on the arc-shaped guide bar 67 of the inverted T-shaped structure. The top end of the arc-shaped guide bar 67 is suspended and mounted on the top of the protective cover 2 through the suspension block 68.

[0051] Specifically, when the turntable 65 drives the cylinder body of the lifting cylinder 61 to swing in a circle, the arc guide bar 67 of the inverted T-shaped structure suspended and fixed by the suspension block 68 cooperates with the inverted T-shaped groove 611 of the inverted T-shaped structure, so that the inverted T-shaped arc guide bar 67 can not only guide the lifting cylinder 61 in its circular swing, but also provide gravity support for the lifting cylinder 61 and the components connected below, thereby preventing the lifting cylinder 61 from shaking in its circular swing, thereby affecting the stable and safe clamping of the handle by the symmetrical clamping block 45.

[0052] In an embodiment of the present invention, a plurality of mounting tubes 7 are provided on the mounting plate 41, and a nozzle 8 is detachably installed in each mounting tube 7, and the plurality of nozzles 8 are connected to the air pump in the test bench 1 through a gas conduit; specifically, when the handle located in the protective cover 2 is normally performing the reciprocating opening and closing fatigue test, the plurality of nozzles 8 can be installed on the mounting tube 7 as needed, and then the high-temperature gas is introduced into the nozzle 8 through the gas conduit by the air pump, and then the plurality of nozzles 8 will spray the high-temperature gas around the handle, so that the handle can perform fatigue test under high temperature state, and at the same time, the cold gas can also be sprayed around the handle through the nozzle 8, so that the handle can perform reciprocating opening and closing fatigue test under low temperature state.

[0053] In the description of this specification, the description with reference to the terms "one embodiment", "example", "specific example", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0054] The preferred embodiments of the present invention disclosed above are only used to help illustrate the present invention. The preferred embodiments do not describe all the details in detail, nor do they limit the invention to the specific implementation methods described. Obviously, many modifications and changes can be made according to the content of this specification. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the present invention, so that those skilled in the art can understand and use the present invention well. The present invention is limited only by the claims and their full scope and equivalents.

Claims

1. A fatigue test device for a truck handle, comprising a test bench (1) and a protective cover (2) arranged above the test bench (1), characterized in that: A test board (3) is installed above the test bench (1), and a clamp cavity for clamping a handle is provided on the test board (3); A handle clamping mechanism (4) for clamping the handle of the handle is arranged directly above the test plate (3); a swing lifting mechanism (6) is connected above the handle clamping mechanism (4); the swing lifting mechanism (6) is used to drive the handle clamping mechanism (4) to perform lifting motion and semicircular swing motion.

2. A fatigue testing device for a truck handle according to claim 1, characterized in that: The handle clamping mechanism (4) comprises a mounting plate (41), a double-headed double-axis cylinder (42), a side ear plate (43), an L-shaped connecting plate (44) and a clamping block (45); the mounting plate (41) is connected to the swing lifting mechanism (6), and a double-headed double-axis cylinder (42) is fixed to the middle of the lower surface of the mounting plate (41); the piston rod end surfaces at both ends of the double-headed double-axis cylinder (42) are connected to the side ear plates (43), and the outer side surfaces of the symmetrical side ear plates (43) are connected to the vertical plates of the L-shaped connecting plate (44); the lower surface of the horizontal plate of the symmetrical L-shaped connecting plate (44) is integrally formed with a clamping block (45); the corresponding side surfaces of the symmetrical clamping block (45) are provided with a C-shaped clamping groove (451), and the C-shaped clamping groove (451) is clamped to the handle of the handle.

3. A fatigue testing device for a truck handle according to claim 2, characterized in that: The handle clamping mechanism (4) further comprises a C-shaped bag strip (46), a folded spring sheet (47) and an air guide tube (48); the C-shaped bag strip (46) is installed in the C-shaped clamping groove (451), and the C-shaped groove of the C-shaped bag strip (46) contacts the handle of the handle; a plurality of folded spring sheets (47) are installed in the C-shaped bag strip (46), and the air guide tube (48) is connected to the wall surface where the C-shaped bag strip (46) and the C-shaped clamping groove (451) are in contact, and the air guide tube (48) is arranged in the clamping block (45).

4. A fatigue testing device for a truck handle according to claim 2, characterized in that: The handle clamping mechanism (4) is provided with a disconnection assembly (5), and the disconnection assembly (5) includes an electromagnetic strip (51), an adsorption iron block (52), a locking bolt (53), a guide slider (54), an adsorption guide block (55) and a support spring (56). The lower surface of the mounting plate (41) is provided with a guide slot (411) along its length direction, and the guide slot (411) is insulated and installed with a segmented electromagnetic strip (51). The top end of the symmetrical side ear plate (43) is insulated and installed with an adsorption iron block (52), and the adsorption iron block (52) is inserted upward into the guide slot (411) to contact the electromagnetic strip (51). The vertical plate of the L-shaped connecting plate (44) is vertically opened. A vertical guide groove (441) is provided, and a guide slider (54) is slidably provided in the vertical guide groove (441), the guide slider (54) is connected to the side ear plate (43) by a locking bolt (53), the two side walls of the vertical guide groove (441) are vertically provided with a limit guide groove (442), and an electromagnetic strip (51) is also insulated and installed on the vertical groove wall of the limit guide groove (442), the two side surfaces of the guide slider (54) are insulated and connected with adsorption guide blocks (55), and the adsorption guide blocks (55) are slidably inserted into the limit guide groove (442) and contact the vertically installed electromagnetic strip (51), and the piston rods at the two ends of the double-headed double-axis cylinder (42) are detachably and slidably connected to the side ear plate (43).

5. A fatigue testing device for a truck handle according to claim 4, characterized in that: The disconnection assembly (5) further comprises an adsorption guide rod (57) and an electromagnetic suction ring (58); the piston rod end surface of the double-headed double-axis cylinder (42) is insulated and mounted with the adsorption guide rod (57), and the adsorption guide rod (57) is slidably inserted into the side ear plate (43); the electromagnetic suction ring (58) is insulated and fixed on the side ear plate (43), and the adsorption guide rod (57) is inserted into the electromagnetic suction ring (58).

6. A fatigue testing device for a truck handle according to claim 2, characterized in that: The swing lifting mechanism (6) comprises a lifting cylinder (61), a support plate (62), a guide rod (63), a guide sleeve (64), a turntable (65) and a suspension frame (66). The bottom end surface of the piston rod of the vertically arranged lifting cylinder (61) is connected to the mounting plate (41), and the lower surface of the cylinder body thereof is installed with a support plate (62). The two ends of the support plate (62) are slidably plugged with guide rods (63) through guide sleeves (64), and the bottom ends of the symmetrical guide rods (63) are connected to the mounting plate (41). A turntable (65) is fixed at the center of the back side of the cylinder body of the lifting cylinder (61), and the center of the turntable (65) is connected to the output shaft of a servo motor horizontally fixed through a suspension frame (66).

7. A truck handle fatigue testing device according to claim 6, characterized in that: The swing lifting mechanism (6) also includes an arc-shaped guide bar (67) and a suspension block (68); an inverted T-shaped groove (611) is provided through the mounting block at the top of the cylinder body of the lifting cylinder (61); the inverted T-shaped groove (611) is slidably sleeved on the arc-shaped guide bar (67) of the inverted T-shaped structure; the top end of the arc-shaped guide bar (67) is suspended and mounted on the top of the protective cover (2) through the suspension block (68).

8. A fatigue testing device for a truck handle according to claim 2, characterized in that: A plurality of mounting tubes (7) are arranged on the mounting plate (41), and a nozzle (8) is detachably mounted in each mounting tube (7), and the plurality of nozzles (8) are connected to an air pump in the test bench (1) via a gas conduit.

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