Tractor lifter lifting force test equipment

Abstract

The invention belongs to the technical field of tractor lifter testing, and relates to tractor lifter lifting force testing equipment which comprises a supporting base, a transmission seat and a connecting mechanism, the connecting mechanism comprises a connecting frame, the connecting frame is hinged to the transmission seat, a connecting rod is slidably installed on the connecting frame, and a coarse adjustment mechanism is fixed to a supporting frame. The two adjusting supports are rotationally connected with the other end of the transmission base and the movable rod respectively, and the two ends of the tension meter are connected with the two adjusting supports respectively. The nut sleeve is rotated to adjust the distance between the nut sleeve and the check block, that is, when the nut sleeve is close to the check block, the compressed length of the spring is increased, and when the nut sleeve is away from the check block, the compressed length of the spring is shortened, so that the pulling force of the spring on the pull rod is increased or decreased, and the initial position of the pull rod does not move; and at the moment, the lifting arm of the tractor lifter drives the end part of the transmission seat and the tension meter to move for the same distance, so that the lifting force of the lifter under the same stroke and different loads can be measured.

Description

Technical Field

[0001] The invention relates to the technical field of tractor lifter testing, in particular to a tractor lifter lifting force testing device. Background Art

[0002] As an important agricultural production tool, the stability and reliability of the performance of tractors play a vital role in improving agricultural production efficiency. As one of the key components of tractors, the lifting performance of tractor hoists directly affects the operating efficiency and safety of tractors. Therefore, it is particularly important to accurately and efficiently test the lift of tractor hoists. The corresponding test system functions mainly to meet the test requirements of various performance indicators, including specific tests such as the lifting force of the suspension point, the lifting force on the frame, and static settlement. Specifically, there are four specific functional requirements: First, it is necessary to meet the test requirements of different horsepower segments. Different horsepower corresponds to different lifting forces. Therefore, a reasonable rated lifting force should be set to meet the test needs of tractors with different horsepower; second, it is necessary to meet the needs of different lifting strokes. Different categories correspond to different lifting stroke indicators. The test system should be able to meet the test needs of various different strokes; third, it is necessary to be compatible with the size requirements of different types of suspension devices. Different types of suspensions have different size requirements. The matching frames of various categories should be configured to meet the test needs of various types of suspension devices.

[0003] The patent application with publication number CN118896714A discloses a tractor lifter lifting force test device, including a base, a bracket and multiple sets of guide wheels, the bracket is installed at the top of the base, and the multiple sets of guide wheels are rotatably installed on the bracket; it also includes a connecting device, a load device, multiple sets of traction ropes, a first connecting plate and a dynamometer, the right ends of the multiple sets of traction ropes are fixed to the connecting device, the connecting device is used to connect the front ends of the multiple sets of traction ropes to the tractor lifting arm, the left ends of the multiple sets of traction ropes are connected to the outer wall of the first connecting plate, the right end of the dynamometer is connected to the outer wall of the first connecting plate, the left end of the dynamometer is installed on the load device, the load device is used to provide a load to the lifting arm of the tractor, and the first connecting plate is slidably installed on the load device; it is convenient for the lifter to perform lifting force tests of different sizes, and improves the convenience of testing different load weights and limit load weights of the lifter. However, the patent still has some shortcomings: 1. The load device needs to prepare multiple sets of weight blocks and water tanks, and it is very inconvenient to disassemble and assemble the weight blocks and fill the water tank during the lifting force test. 2. The traction rope may break when subjected to high load testing, posing a safety hazard. Summary of the invention

[0004] In order to solve the problem that the existing testing equipment for tractor hoist is not convenient for changing the load to perform the lifting force test, the present invention provides a testing equipment for the lifting force of tractor hoist.

[0005] The technical solution adopted by the present invention to solve its technical problems is: a tractor lifter lifting force testing device comprises a supporting base, a transmission seat is rotatably mounted on the supporting base, a connecting mechanism, a supporting frame, a dynamometer, a coarse adjustment mechanism and a fine adjustment mechanism, the connecting mechanism comprises a connecting frame and two connecting rods, the connecting frame is hinged to one end of the transmission seat, two connecting rods are slidably mounted at two ends of the connecting frame, threads are provided at the ends of the connecting rods, the connecting rods are used to connect the tractor lifting arm, the supporting frame is erected on the supporting base, the coarse adjustment mechanism is fixed to the upper end of the supporting frame, the coarse adjustment mechanism comprises a movable rod, the fine adjustment mechanism comprises two mirror-symmetrically arranged adjustment brackets, the two adjustment brackets are respectively rotatably connected to the other end of the transmission seat and the movable rod, and the two ends of the dynamometer are respectively connected to the two adjustment brackets; A pull rod is slidably mounted on each of the adjustment brackets, one end of the pull rod is connected to the dynamometer, a stopper is fixed on the pull rod between the adjustment bracket and the dynamometer, the other end of the pull rod is coaxially fixedly connected to a screw rod, a nut sleeve is threadedly connected to the screw rod, and a thrust spring is abutted between the nut sleeve and the adjustment bracket.

[0006] Preferably, the connecting mechanism also includes a sliding seat, an adjusting screw and two synchronization rods, the two ends of the adjusting screw are rotatably mounted on the connecting frame and are located between the two connecting rods, the sliding seat is slidably mounted in the middle of the connecting frame and is threadedly connected to the adjusting screw, the two ends of the synchronization rod are respectively hinged to the sliding seat and the end of the connecting rod, and the two connecting rods can be driven to move closer to or away from each other by rotating the adjusting screw.

[0007] Preferably, a support plate is fixed to the side of the nut sleeve facing the dynamometer, and both ends of the support plate are bent to form legs, and the legs are used to abut against the adjustment bracket.

[0008] Preferably, the coarse adjustment mechanism also includes a top hanger, a telescopic guide rod and a plurality of tension springs, the top hanger is fixed to the top of the support frame, one end of the telescopic guide rod is rotatably mounted on the top hanger, the other end of the telescopic guide rod is fixedly connected to the middle section of the movable rod, one end of the plurality of tension springs is rotatably connected to the top hanger, and the other end of the plurality of tension springs is fixed with a hook, and the hook can be engaged on the movable rod.

[0009] Preferably, limit seats are fixed on both sides of the support frame, and limit rods are detachably installed in the limit seats. The limit seats and the limit rods are both arranged below the movable rod, and the limit rods are used to support the movable rod.

[0010] Preferably, an extended support plate is also installed on the support base, one end of the extended support plate is hinged to the support base, and a locking rod is horizontally rotatably installed on one end of the support base close to the extended support plate, and a lock buckle that can engage with the locking rod is fixed on the extended support plate. When the extended support plate is unfolded outward, the locking rod can be engaged with the lock buckle by moving the locking rod.

[0011] The beneficial effects of the present invention are as follows: a fine-tuning mechanism is provided, and when testing the lifting force of the lifter under low-load conditions, the limit rod is first inserted into the limit seat, and the movable rod is supported by the limit rod. Then the nut sleeve is rotated to adjust the distance between the nut sleeve and the block, so as to adjust the load of the lifter within a small range, that is, when the nut sleeve approaches the block, the compressed length of the spring becomes longer, and when the nut sleeve moves away from the block, the compressed length of the spring becomes shorter, so that the tension of the spring applied to the pull rod becomes larger or smaller. In the initial state of the pull rod, the block fixed on the pull rod is always in contact with the adjustment bracket, so that when the tension applied to the pull rod changes, its initial position will not move. At this time, the lifting arm of the tractor lifter drives the end of the transmission seat and the dynamometer to move the same distance, so that the lifting force under low-load conditions with the same stroke of the lifter can be measured. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0013] Figure 1 It is a structural schematic diagram of the best embodiment of the present invention; Figure 2 It is a structural schematic diagram of the connecting rod of the present invention; Figure 3 It is a structural schematic diagram of the support base of the present invention; Figure 4 It is a structural schematic diagram of the support frame of the present invention; Figure 5 It is a schematic diagram of the structure of the adjusting bracket of the present invention; Figure 6 It is a structural schematic diagram of the tension spring of the present invention.

[0014] 1. Support base; 2. Transmission seat; 3. Connecting mechanism; 4. Support frame; 5. Tension gauge; 6. Coarse adjustment mechanism; 7. Fine adjustment mechanism; 8. Connecting frame; 9. Connecting rod; 10. Movable rod; 11. Adjusting bracket; 12. Sliding seat; 13. Adjusting screw; 14. Synchronizing rod; 15. Pull rod; 16. Block; 17. Locking buckle; 18. Nut sleeve; 19. Thrust spring; 20. Support plate; 21. Support leg; 22. Top bracket; 23. Telescopic guide rod; 24. Tension spring; 25. Hook; 26. Limit seat; 27. Limit rod; 28. Extended support plate; 29. ​​Locking rod. DETAILED DESCRIPTION

[0015] The technical solution of the present invention will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0016] like Figures 1 to 6 As shown, the present invention provides an embodiment of a lifting force testing device for a tractor hoist, comprising a supporting base 1, on which a transmission base 2 is rotatably mounted, a connecting mechanism 3, a supporting frame 4, a dynamometer 5, a coarse adjustment mechanism 6 and a fine adjustment mechanism 7, wherein the connecting mechanism 3 comprises a connecting frame 8 and two connecting rods 9, the connecting frame 8 is hinged to one end of the transmission base 2, two connecting rods 9 are slidably mounted at both ends of the connecting frame 8, threads are provided at the ends of the connecting rods 9, and the connecting rods 9 are used to connect the tractor lifting arm, the supporting frame 4 is mounted on the supporting base 1, the coarse adjustment mechanism 6 is fixed to the upper end of the supporting frame 4, the coarse adjustment mechanism 6 comprises a movable rod 10, and the fine adjustment mechanism 7 comprises two adjusting brackets 11 arranged in mirror symmetry, the two adjusting brackets 11 are respectively rotatably connected to the other end of the transmission base 2 and the movable rod 10, and the two ends of the dynamometer 5 are respectively connected to the two adjusting brackets 11.

[0017] The connecting mechanism 3 also includes a sliding seat 12, an adjusting screw 13 and two synchronous rods 14. The two ends of the adjusting screw 13 are rotatably mounted on the connecting frame 8 and are located between the two connecting rods 9. The sliding seat 12 is slidably mounted in the middle of the connecting frame 8 and is threadedly connected to the adjusting screw 13. The two ends of the synchronous rod 14 are respectively hinged to the sliding seat 12 and the ends of the connecting rod 9. The rotation of the adjusting screw 13 can drive the two connecting rods 9 to move closer to or away from each other.

[0018] Before testing the tractor lifter, first fix the connecting rod 9 on the lifting arm of the tractor lifter, and adjust the distance between the ends of the two connecting rods 9 by rotating the adjusting screw 13 so that the connecting rod 9 can be connected to lifting arms of different models or widths.

[0019] A pull rod 15 is slidably mounted on each adjusting bracket 11, one end of which is connected to the dynamometer 5, a stopper 16 is fixed on the pull rod 15 between the adjusting bracket 11 and the dynamometer 5, the other end of the pull rod 15 is coaxially fixedly connected to a screw rod, a nut sleeve 18 is threadedly connected to the screw rod, and a thrust spring 19 is abutted between the nut sleeve 18 and the adjusting bracket 11.

[0020] When testing the lifting force of the lifter under low load conditions, first insert the limit rod 27 into the limit seat 26, support the movable rod 10 through the limit rod 27, and then rotate the nut sleeve 18 to adjust the distance between the nut sleeve 18 and the block 16, so as to adjust the load of the lifter in a small range, that is, when the nut sleeve 18 approaches the block 16, the compressed length of the spring becomes longer, and when the nut sleeve 18 moves away from the block 16, the compressed length of the spring becomes shorter, so that the tension of the spring on the pull rod 15 becomes larger or smaller. In the initial state of the pull rod 15, the block 16 fixed on the pull rod 15 always abuts against the adjusting bracket 11. Therefore, when the tension on the pull rod 15 changes, its initial position will not move. At this time, the lifting arm of the tractor lifter drives the end of the transmission seat 2 and the dynamometer 5 to move the same distance, so that the lifting force under low load conditions with the same stroke of the lifter can be measured.

[0021] A support plate 20 is also fixed to the side of the nut sleeve 18 facing the dynamometer 5 . Both ends of the support plate 20 are bent to form legs 21 . The legs 21 are used to abut against the adjustment bracket 11 .

[0022] Limit seats 26 are also fixed on both sides of the support frame 4, and limit rods 27 are detachably installed in the limit seats 26. The limit seats 26 and the limit rods 27 are both arranged below the movable rod 10. The limit rod 27 is used to support the movable rod 10. When testing the lifting force of the lifter under low load conditions, the limit rod 27 is inserted into the limit seat 26, and the hooks 25 of the multiple tension springs 24 are removed from the movable rod 10, so that the movable rod 10 falls on the limit rod 27, and the movable rod 10 is supported by the limit rod 27. At this time, during the test, pulling the dynamometer 5 can only move the pull rod 15, and cannot move the movable rod 10 downward, so as to facilitate precise adjustment of the stroke of the pull rod 15.

[0023] The coarse adjustment mechanism 6 also includes a top bracket 22, a telescopic guide rod 23 and a plurality of tension springs 24. The top bracket 22 is fixed to the top of the support frame 4. One end of the telescopic guide rod 23 is rotatably mounted on the top bracket 22. The other end of the telescopic guide rod 23 is fixedly connected to the middle section of the movable rod 10. One end of the plurality of tension springs 24 is rotatably connected to the top bracket 22. The other end of the plurality of tension springs 24 is fixed with a hook 25, which can be engaged with the movable rod 10.

[0024] The working principle of the coarse adjustment mechanism 6 is: when testing the lifting force of the lifter under high load conditions, according to the actual required load size, multiple tension springs 24 are engaged one by one on the movable rod 10, and then the limit rod 27 is removed, and the nut sleeve 18 is rotated to make the support leg 21 of the support plate 20 abut against the adjustment bracket 11. At this time, the force generated by the pull rod 15 is directly transmitted to the adjustment bracket 11 through the support plate 20 and the support leg 21, and drives the movable rod 10 to move downward, so that multiple tension springs 24 are stretched, so that the lifter can withstand a higher load within the same stroke, thereby achieving the effect of testing the lifting force under high load conditions of the lifter.

[0025] An extended support plate 28 is also installed on the support base 1, one end of the extended support plate 28 is hinged to the support base 1, and a locking rod 29 is horizontally rotatably installed on the end of the support base 1 close to the extended support plate 28. A lock buckle 17 that can engage with the locking rod 29 is fixed on the extended support plate 28. When the extended support plate 28 is unfolded outward, the locking rod 29 can be moved to engage the locking rod 29 with the lock buckle 17. When testing the lifting force of the lifter under high load conditions, unfolding the extended support plate 28 can make the support base 1 more stable. By engaging the locking rod 29 with the lock buckle 17, the extended support plate 28 and the support base 1 can remain in a locked state, further improving the stability of the support base 1.

[0026] Based on the above ideal embodiments of the present invention, the relevant staff can make various changes and modifications without departing from the technical concept of the present invention through the above description. The technical scope of the present invention is not limited to the contents of the specification, and its technical scope must be determined according to the scope of the claims.

Claims

1. A tractor lifter lifting force testing device, comprising a support base (1), on which a transmission base (2) is rotatably mounted, characterized in that: It also comprises a connecting mechanism (3), a support frame (4), a tension gauge (5), a coarse adjustment mechanism (6) and a fine adjustment mechanism (7), wherein the connecting mechanism (3) comprises a connecting frame (8) and two connecting rods (9), wherein the connecting frame (8) is hinged to one end of the transmission seat (2), and the two connecting rods (9) are slidably mounted at the two ends of the connecting frame (8), and the ends of the connecting rods (9) are provided with threads, and the connecting rods (9) are used to connect the lifting arm of the tractor, the supporting frame (4) is mounted on the supporting base (1), the coarse adjustment mechanism (6) is fixed to the upper end of the supporting frame (4), the coarse adjustment mechanism (6) comprises a movable rod (10), and the fine adjustment mechanism (7) comprises two adjustment brackets (11) arranged in a mirror-symmetrical manner, and the two adjustment brackets (11) are respectively rotatably connected to the other end of the transmission seat (2) and the movable rod (10), and the two ends of the tension gauge (5) are respectively connected to the two adjustment brackets (11); A pull rod (15) is slidably mounted on each of the adjustment brackets (11), one end of the pull rod (15) is connected to the dynamometer (5), a stopper (16) is fixed on the pull rod (15) at a position between the adjustment bracket (11) and the dynamometer (5), the other end of the pull rod (15) is coaxially fixedly connected to a screw rod, a nut sleeve (18) is threadedly connected to the screw rod, and a thrust spring (19) is abutted between the nut sleeve (18) and the adjustment bracket (11).

2. The tractor lifter lifting force testing device according to claim 1, characterized in that: The connecting mechanism (3) further comprises a sliding seat (12), an adjusting screw (13) and two synchronous rods (14); the two ends of the adjusting screw (13) are rotatably mounted on the connecting frame (8) and are located between the two connecting rods (9); the sliding seat (12) is slidably mounted in the middle of the connecting frame (8) and is threadedly connected to the adjusting screw (13); the two ends of the synchronous rod (14) are respectively hinged to the sliding seat (12) and the end of the connecting rod (9); and the two connecting rods (9) can be driven to move closer to or farther from each other by the rotation of the adjusting screw (13).

3. The tractor lifter lifting force testing device according to claim 1, characterized in that: A support plate (20) is also fixed to the side of the nut sleeve (18) facing the dynamometer (5), and two ends of the support plate (20) are bent to form supporting legs (21), and the supporting legs (21) are used to abut against the adjustment bracket (11).

4. The tractor lifter lifting force testing device according to claim 1, characterized in that: The coarse adjustment mechanism (6) further comprises a top hanger (22), a telescopic guide rod (23) and a plurality of tension springs (24); the top hanger (22) is fixed to the top of the support frame (4); one end of the telescopic guide rod (23) is rotatably mounted on the top hanger (22); the other end of the telescopic guide rod (23) is fixedly connected to the middle section of the movable rod (10); one end of the plurality of tension springs (24) is rotatably connected to the top hanger (22); the other end of the plurality of tension springs (24) is fixedly provided with a hook (25); and the hook (25) can be engaged with the movable rod (10).

5. The tractor lifter lifting force testing device according to claim 1, characterized in that: Limiting seats (26) are also fixed on both sides of the support frame (4), and limiting rods (27) are detachably installed in the limiting seats (26). The limiting seats (26) and the limiting rods (27) are both arranged below the movable rod (10), and the limiting rods (27) are used to support the movable rod (10).

6. The tractor lifter lifting force testing device according to claim 1, characterized in that: An extended support plate (28) is also mounted on the support base (1), one end of the extended support plate (28) is hinged to the support base (1), a locking rod (29) is mounted horizontally and rotatably on one end of the support base (1) close to the extended support plate (28), a locking buckle (17) capable of engaging with the locking rod (29) is fixed on the extended support plate (28), and when the extended support plate (28) is unfolded outward, the locking rod (29) can be moved to engage with the locking buckle (17).

Images