A weight-supporting and shock-absorbing mechanism and tracked all-terrain vehicle

Abstract

A weight-supporting and shock-absorbing mechanism comprises: a longitudinal beam, a rubber torsion sleeve, a crank arm and a supporting roller; a plurality of rubber torsion sleeves are evenly arranged on the longitudinal beam; each rubber torsion sleeve is connected to two crank arms, and the two crank arms are located on both sides of the longitudinal beam; a supporting roller is arranged on each crank arm; the angle between the vertical rod of the crank arm and the vertical direction is an acute angle; a friction pair structure is arranged between the longitudinal beam and the vertical rod of the crank arm. The supporting roller assembly is formed by the crank arm and the supporting roller together, and multiple groups of supporting roller assemblies are installed on the left and right sides of the longitudinal beam, so that the longitudinal beam is located in the middle of the two supporting roller assemblies. When the track passes through a bumpy road surface, the supporting rollers installed on both sides of the longitudinal beam can make the track fully touch the ground, so that the actual contact area between the track and the road surface is larger, the ground contact pressure is smaller, and the passing capacity is stronger. At the same time, when the road surface transmits impact force, the impact force can be evenly applied to the left and right sides of the longitudinal beam, so that the force on the frame is more reasonable.

Description

Technical Field

[0001] The present invention relates to the technical field of all-terrain vehicles, and in particular to a weight-supporting and shock-absorbing mechanism, and also to a tracked all-terrain vehicle having the weight-supporting and shock-absorbing mechanism. Background Art

[0002] An all-terrain vehicle is a tracked all-terrain engineering vehicle that can travel in various geographical environments such as high-cold mountains, tropical jungles, deserts, swamps, rivers and lakes, and has high off-road passability, amphibious functions, high flexibility and reliable protection capabilities. Due to the complex driving area, the alternating load has a great impact on the supporting wheel system and the vehicle body. The design of the supporting wheel system must meet the requirements of good shock absorption of the whole vehicle and full ground contact of the track. It is necessary to develop a weight-bearing and shock-absorbing mechanism for tracked all-terrain vehicles for buffering and attenuating alternating loads to ensure the high maneuverability of the all-terrain vehicle in complex areas.

[0003] Most existing tracked all-terrain vehicles use single-wheel weight-supporting and shock-absorbing. The weight-supporting tire is located in the center of the track and the longitudinal beam is located on one side of the weight-supporting wheel. When the track passes through a bumpy road, it is impossible to ensure that the track is fully grounded. At the same time, when the road transmits impact force, the impact transmitted by the weight-supporting tire can only act on one side of the longitudinal beam, resulting in uneven force on the longitudinal beam, which affects the service life of the frame.

[0004] The existing crawler-type all-terrain vehicle load-bearing tires and frame longitudinal beams are rigidly connected, and the tires are mainly used for weight support and shock absorption, which can only attenuate the vertical upward impact of the ground, and the shock absorption effect is poor; and when the vehicle passes through a vertical obstacle at high speed, it cannot reduce the horizontal backward impact, resulting in impact on the frame, affecting the service life of the frame and driving comfort;

[0005] In the existing weight-supporting and shock-absorbing mechanism, when the ground impact is large and the supporting wheel has a large upward displacement, the rigid connection sleeve is easily damaged due to the lack of limit, and the riding comfort is poor. Summary of the invention

[0006] The main purpose of the present invention is to provide a weight-supporting and shock-absorbing mechanism and a tracked all-terrain vehicle, aiming to solve the above-mentioned technical problems.

[0007] To achieve the above-mentioned purpose, on the one hand, the present invention proposes a weight-supporting and shock-absorbing mechanism, comprising: a longitudinal beam, a rubber torsion sleeve, a crank arm and a supporting roller; a plurality of rubber torsion sleeves are evenly distributed on the longitudinal beam; each rubber torsion sleeve is connected to two crank arms, and the two crank arms are located on both sides of the longitudinal beam; a supporting roller is arranged on each crank arm; the angle between the vertical rod of the crank arm and the vertical direction is an acute angle; a friction pair structure is arranged between the longitudinal beam and the vertical rod of the crank arm.

[0008] Preferably, the friction pair structure comprises a limit block and a wear-resistant block; the limit block is mounted on the vertical rod of the crank arm; the wear-resistant block is mounted on the longitudinal beam; the limit block and the wear-resistant block form a friction pair.

[0009] Preferably, the rubber torque sleeve comprises a steel inner sleeve, a steel outer sleeve, and a rubber sleeve arranged between the steel inner sleeve and the steel outer sleeve; the steel inner sleeve, the rubber sleeve and the steel outer sleeve are in a high-temperature bonding structure; a spline is arranged on the outer cylindrical surface of the first shaft body of the crank arm, and the first shaft body of the crank arm is inserted on the steel inner sleeve and matched through the spline;

[0010] Preferably, the track wheels are coated with a rubber layer.

[0011] Preferably, the crank arm includes a hollow first shaft body, which is arranged at the upper end of the vertical rod; the first shaft bodies of the two crank arms are inserted into the rubber torque sleeve, and the bolts pass through the inner holes of the first shaft bodies of the two crank arms and fasten the two crank arms to the rubber torque sleeve.

[0012] Preferably, a first positioning block and a second positioning block are provided on the side of the longitudinal beam; the first positioning block and the second positioning block are spaced apart from each other in the upper and lower directions; the wear-resistant block is provided between the first positioning block and the second positioning block, and the upper end surface of the wear-resistant block abuts against the first positioning block, and the lower end surface of the wear-resistant block abuts against the second positioning block; the wear-resistant block and the longitudinal beam are fastened together by screws.

[0013] Preferably, the load-supporting and shock-absorbing mechanism further comprises a crawler track; the crawler track envelops the supporting wheels therein; and the crawler track is a rubber crawler track.

[0014] The crank arm of the weight-supporting and shock-absorbing mechanism includes a second shaft body; the second shaft body is arranged at the lower end of the vertical rod, and the supporting wheel is installed on the second shaft body through a bearing; a lubricating oil chamber is arranged on the second shaft body, and an oil filling port is arranged on the lower end surface of the vertical rod, and the oil filling port is connected with the lubricating oil chamber; an oil hole is arranged on the second shaft body, and the oil hole passes through the lubricating oil chamber to the outer cylindrical surface at the bearing installation position.

[0015] The limit block of the weight-supporting and shock-absorbing mechanism includes an ear plate and a U-shaped plate; the ear plate is arranged at the opening of the U-shaped plate; a slot is formed between the ear plate and the two side walls of the U-shaped plate; the vertical rod cross-section of the crank arm is rectangular, and its width matches the slot; the limit block is connected to the vertical rod through the slot; screw holes are arranged on the ear plate, and the limit block is fastened to the vertical rod by screws.

[0016] On the other hand, the present invention further provides a tracked all-terrain vehicle, which includes the above-mentioned weight-supporting and shock-absorbing mechanism.

[0017] Due to the adoption of the above technical solution, the beneficial effects of the present invention are as follows:

[0018] (1) The present invention forms a supporting wheel assembly by utilizing a crank arm and a supporting wheel together, and by installing a plurality of supporting wheel assemblies on the left and right sides of the longitudinal beam, the longitudinal beam is located in the middle of the two supporting wheel assemblies. When the crawler track passes through a bumpy road surface, the supporting wheels installed on both sides of the longitudinal beam can make the crawler track fully contact the ground, so that the actual contact area between the crawler track and the road surface is larger, the ground contact pressure is smaller, and the passing ability is stronger. At the same time, when the road surface transmits impact force, the impact force can be evenly applied to the left and right sides of the longitudinal beam, so that the force on the frame is more reasonable.

[0019] (2) When subjected to road impact, the impact force is first transmitted through the rubber track to the supporting wheel, and then to the rubber torsion sleeve through the supporting wheel. The impact force gradually decays during the transmission process. When the attenuated impact force is transmitted to the rubber torsion sleeve through the crank arm, since the angle between the vertical rod on the crank arm and the vertical direction is an acute angle, the vertical upward impact force is decomposed along the vertical rod of the crank arm, so that the force of the crank arm on the rubber torsion sleeve is further attenuated. Finally, the impact force is further attenuated through the rubber deformation of the rubber torsion sleeve. The impact force is decomposed along the crank arm and further attenuated under the action of the crank arm-rubber torsion sleeve, so that the impact force finally transmitted to the longitudinal beam is smaller and the shock absorption effect is better. At the same time, when subjected to impact in other directions.

[0020] (3) When the road impact is large, the rubber torsion bushing will be greatly deformed, causing the crank arm to deviate. By setting a friction pair structure between the longitudinal beam and the vertical rod of the crank arm, a certain obstruction effect can be exerted on the vertical rod of the crank arm. When the vertical rod of the crank arm deviates greatly around the rubber torsion bushing, the friction pair structure can play a role of friction resistance to the deviation of the vertical rod of the crank arm, further playing a role of reducing the impact and improving the shock absorption effect.

[0021] (4) Since the rubber torque sleeve is composed of two concentric steel sleeves with rubber embedded inside, it can reduce the impact in the radial direction of the sleeve, and the shock absorption range is wider BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0023] Figure 1 This is an exploded schematic diagram of the weight-supporting and shock-absorbing mechanism provided by the present invention;

[0024] Figure 2 The three-dimensional structure of the weight-supporting and shock-absorbing mechanism provided by the present invention is shown in FIG. Figure 1 ;

[0025] Figure 3 The three-dimensional structure of the weight-supporting and shock-absorbing mechanism provided by the present invention is shown in FIG. Figure 2 ;

[0026] Figure 4 This is a front view of the weight-supporting and shock-absorbing mechanism provided by the present invention;

[0027] Figure 5 is a cross-sectional view of the crank arm of the present invention;

[0028] Figure 6 for Figure 1 A is an enlarged view of the middle figure;

[0029] Figure 7 is a cross-sectional view of the rubber torsion sleeve of the present invention;

[0030] Figure 8 This is a schematic diagram of the overall structure of the weight-supporting and shock-absorbing mechanism provided by the present invention after being put on the track.

[0031] Explanation of the accompanying numbers: 1-longitudinal beam; 101-first positioning block; 102-second positioning block; 2-rubber torque sleeve; 201-steel inner sleeve; 202-rubber sleeve; 203-steel outer sleeve; 3-crank arm; 301-first shaft; 302-vertical rod; 303-second shaft; 304-lubricating oil chamber; 305-oil hole; 306-oil filling port; 4-supporting wheel; 401-rubber layer; 5-friction pair structure; 501-limiting block; 5011-ear plate; 5012-U-shaped plate; 5013-slot; 502-wear-resistant block; 6-bolt; 7-track; 8-bearing. DETAILED DESCRIPTION

[0032] 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.

[0033] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back, etc.) are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0034] In addition, the descriptions of "first", "second", etc. in the present invention are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in the field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0035] Combination Figures 1 to 4 As shown, a weight-supporting and shock-absorbing mechanism comprises: a longitudinal beam 1, a rubber torsion sleeve 2, a crank arm 3 and a supporting roller 4; a plurality of rubber torsion sleeves 2 are evenly arranged on the longitudinal beam 1; two crank arms 3 are connected to each rubber torsion sleeve 2, and the two crank arms 3 are located on both sides of the longitudinal beam 1; a supporting roller 4 is arranged on each crank arm 3; the angle between the vertical rod 302 of the crank arm 3 and the vertical direction is an acute angle θ; a friction pair structure 5 is arranged between the longitudinal beam 1 and the vertical rod 302 of the crank arm 3. Further, the friction pair structure 5 comprises a limit block 501 and a wear-resistant block 502; the limit block 501 is installed on the vertical rod 302 of the crank arm 3; the wear-resistant block 502 is installed on the longitudinal beam 1; the limit block 501 and the wear-resistant block 502 form a friction pair. It also comprises a crawler 7; the crawler 7 envelops the supporting roller 4 therein; the crawler 7 is a rubber crawler. The track wheel 4 is coated with a rubber layer 401 .

[0036] The rubber torsion sleeve 2 includes a steel inner sleeve 201, a steel outer sleeve 203, and a rubber sleeve 202 arranged between the steel inner sleeve 201 and the steel outer sleeve 203; the steel inner sleeve 201, the rubber sleeve 202 and the steel outer sleeve 203 are a high-temperature bonding structure; a spline is arranged on the outer cylindrical surface of the first shaft body 301 of the crank arm 3, and the first shaft body 301 of the crank arm 3 is inserted on the steel inner sleeve 201 and matched through the spline.

[0037] The present invention forms a supporting wheel assembly by utilizing the crank arm 3 and the supporting wheel 4, and by installing multiple groups of supporting wheel assemblies on the left and right sides of the longitudinal beam 1, the longitudinal beam 1 is located in the middle of the two supporting wheel assemblies. When the crawler track 7 passes through a bumpy road surface, the supporting wheels installed on both sides of the longitudinal beam 1 can make the crawler track 7 fully contact the ground, so that the actual contact area between the crawler track 7 and the road surface is larger, the ground contact pressure is smaller, and the passing ability is stronger. At the same time, when the road surface transmits impact force, the impact force can be evenly applied to the left and right sides of the longitudinal beam 1, so that the force on the frame is more reasonable.

[0038] When subjected to the impact force of the road surface, the impact force is first transmitted to the supporting wheel 4 through the rubber track 7, and the supporting wheel 4 is then transmitted to the rubber torsion sleeve 2 through the crank arm 3. During the impact force transmission process, the rubber track 7 and the outer rubber of the supporting wheel 4 have the effect of attenuating the impact. When the attenuated impact force is transmitted to the rubber torsion sleeve 2 through the crank arm 3, since the vertical rod 302 of the crank arm 3 has a certain angle θ with the vertical direction, the vertical upward impact force is decomposed into Fcosθ along the direction of the crank arm 3, so that the crank arm 3 is transmitted to the rubber torsion sleeve 2 is further attenuated, and finally the impact force is further attenuated through the rubber deformation of the rubber torsion sleeve 2. After the three-level attenuation of rubber track 7-roller 4, the impact force is decomposed along the crank arm 3, and the crank arm 3-rubber torsion sleeve 2, the impact force finally transmitted to the longitudinal beam 1 is smaller, and the shock absorption effect is better. At the same time, when impacted in other directions, since the rubber torsion sleeve 2 is two concentric steel sleeves with rubber embedded inside, the impact in the radial direction of the sleeve can be damped, and the shock absorption range is wider.

[0039] Furthermore, when the impact of the road surface is large, the rubber torsion sleeve 2 is greatly deformed, causing the vertical rod 302 of the crank arm 3 to deviate around the rubber torsion sleeve 2. The limit block 501 on the vertical rod 302 and the wear block 502 on the longitudinal beam 1 can play a certain blocking role, limiting the vertical rod 302 from further rotating around the rubber torsion sleeve 2. When the vertical rod 302 of the crank arm 3 deviates greatly, the wear block 502 and the limit block 501 form a friction pair, forming a friction resistance to the deviation of the vertical rod 302, hindering its movement, further playing a shock absorbing role, and avoiding excessive displacement of the vertical rod 302. By connecting multiple sets of supporting wheel assemblies in parallel on the longitudinal beam of the crawler-type all-terrain vehicle, the crawler is fully attached to the ground, and the shock absorbing effect is better, and the scope of application is wider.

[0040] Combination Figure 1 , Figure 5 As shown, the crank arm 3 includes a hollow first shaft body 301, which is arranged at the upper end of the vertical rod 302; the first shaft bodies 301 of the two crank arms 3 are inserted into the rubber torque sleeve 2, and the bolts 6 pass through the inner holes of the first shaft bodies 301 of the two crank arms 3, and fasten the two crank arms 3 to the rubber torque sleeve 2. By setting the first shaft body 301 to a hollow shape and fixing the two crank arms 2 in the same rubber torque sleeve 2 with the bolts 6, the installation structure is simple and easy to assemble and disassemble.

[0041] Combination Figure 1As shown, a first positioning block 101 and a second positioning block 102 are arranged on the side of the longitudinal beam 1; the first positioning block 101 and the second positioning block 102 are arranged at intervals in the upper and lower directions; the wear-resistant block 502 is arranged between the first positioning block 101 and the second positioning block 102, and the upper end face of the wear-resistant block 502 abuts against the first positioning block 101, and the lower end face of the wear-resistant block 502 abuts against the second positioning block 102; the wear-resistant block 502 is fastened to the longitudinal beam 1 by screws. When the limiting block 501 and the wear-resistant block 502 start to contact, an instantaneous impact force will be generated. By setting the first positioning block 101 and the second positioning block 102, a limiting effect is formed on the upper and lower directions of the wear-resistant block 502 to prevent the wear-resistant block 502 from moving.

[0042] Combination Figure 3 , Figure 5 As shown, the crank arm 3 includes a second shaft body 303; the second shaft body 303 is arranged at the lower end of the vertical rod 302, and the supporting roller 4 is installed on the second shaft body 303 through the bearing 8; a lubricating oil chamber 304 is arranged on the second shaft body 303, and an oil filling port 306 is arranged on the lower end surface of the vertical rod 302, and the oil filling port 306 is connected to the lubricating oil chamber 304; an oil hole 305 is arranged on the second shaft body 303, and the oil hole 305 passes through the lubricating oil chamber 304 to the outer cylindrical surface where the bearing 8 is installed. The structure in which the oil hole 305 is connected to the lubricating oil chamber 304 can realize lubrication of the bearing 8. When lubricating, there is no need to disassemble the supporting roller, so as to avoid damage to the bearing and the internal limit ring during the disassembly process.

[0043] Combination Figure 1 , Figure 6 As shown, the stopper 501 comprises an ear plate 5011 and a U-shaped plate 5012; the ear plate 5011 is arranged at the opening of the U-shaped plate 5012; a slot 5013 is formed between the ear plate 5011 and the two side walls of the U-shaped plate 5012; the vertical rod 302 of the crank arm 3 has a rectangular cross section, and its width matches the slot 5013; the stopper 501 is clamped on the vertical rod 302 through the slot 5013; a screw through hole is arranged on the ear plate 5011, and the stopper 501 is fastened to the vertical rod 302 through the screw. By setting the cross section of the vertical rod 302 of the crank arm 3 to be rectangular, the slot 5013 formed between the ear plate 5011 and the two side walls of the U-shaped plate 5012 cooperates with the vertical rod 302, and the slot 5013 plays a positioning and clamping role, which facilitates the installation of the stopper 501 and prevents the stopper 501 and the wear-resistant block 502 from moving during friction.

[0044] As another aspect of the present embodiment, the present embodiment further provides a tracked all-terrain vehicle, and the tracked all-terrain vehicle includes the above-mentioned weight-supporting and shock-absorbing mechanism.

[0045] The above description is only a preferred embodiment of the present invention, and does not limit the patent scope of the present invention. All equivalent structural changes made by using the contents of the present invention specification and drawings under the concept of the present invention, or directly / indirectly applied in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A weight-supporting and shock-absorbing mechanism, characterized in that: include: A longitudinal beam (1), a rubber torsion bushing (2), a crank arm (3) and a track roller (4); A plurality of rubber torsion bushings (2) are evenly arranged on the longitudinal beam (1); Two crank arms (3) are connected to each rubber torsion sleeve (2), and the two crank arms (3) are located on both sides of the longitudinal beam (1); a supporting wheel (4) is arranged on each crank arm (3); The included angle between the vertical rod (302) of the crank arm (3) and the vertical direction is an acute angle; A friction pair structure (5) is provided between the longitudinal beam (1) and the vertical rod (302) of the crank arm (3); The friction pair structure (5) comprises a limit block (501) and a wear-resistant block (502); the limit block (501) is mounted on the vertical rod (302) of the crank arm (3); the wear-resistant block (502) is mounted on the longitudinal beam (1); the limit block (501) and the wear-resistant block (502) form a friction pair; The crank arm (3) comprises a second shaft body (303); the second shaft body (303) is arranged at the lower end of the vertical rod (302), and the supporting wheel (4) is installed on the second shaft body (303) through a bearing (8); a lubricating oil chamber (304) is arranged on the second shaft body (303), and an oil filling port (306) is arranged on the lower end surface of the vertical rod (302), and the oil filling port (306) is connected to the lubricating oil chamber (304); an oil hole (305) is arranged on the second shaft body (303), and the oil hole (305) passes through the lubricating oil chamber (304) to the outer cylindrical surface at the installation position of the bearing (8).

2. A weight-supporting and shock-absorbing mechanism according to claim 1, characterized in that: The rubber torque sleeve (2) comprises a steel inner sleeve (201), a steel outer sleeve (203), and a rubber sleeve (202) arranged between the steel inner sleeve (201) and the steel outer sleeve (203); the steel inner sleeve (201), the rubber sleeve (202) and the steel outer sleeve (203) are in a high-temperature bonding structure; A spline is provided on the outer cylindrical surface of the first shaft body (301) of the crank arm (3), and the first shaft body (301) of the crank arm (3) is inserted into the steel inner shaft sleeve (201) and matched through the spline.

3. A weight-supporting and shock-absorbing mechanism according to claim 1, characterized in that: The track wheel (4) is coated with a rubber layer (401).

4. A weight-supporting and shock-absorbing mechanism according to claim 1, characterized in that: The crank arm (3) comprises a hollow first shaft body (301), and the first shaft body (301) is arranged at the upper end of the vertical rod (302); the first shaft bodies (301) of the two crank arms (3) are inserted into the rubber torsion shaft sleeve (2), and the bolt (6) passes through the inner holes of the first shaft bodies (301) of the two crank arms (3) and fastens the two crank arms (3) to the rubber torsion shaft sleeve (2).

5. A weight-supporting and shock-absorbing mechanism according to claim 1, characterized in that: A first positioning block (101) and a second positioning block (102) are arranged on the side of the longitudinal beam (1); the first positioning block (101) and the second positioning block (102) are arranged with an interval up and down; the wear-resistant block (502) is arranged between the first positioning block (101) and the second positioning block (102), and the upper end surface of the wear-resistant block (502) abuts against the first positioning block (101), and the lower end surface of the wear-resistant block (502) abuts against the second positioning block (102); the wear-resistant block (502) and the longitudinal beam (1) are fastened and connected by screws.

6. A weight-supporting and shock-absorbing mechanism according to claim 1, characterized in that: It also includes a crawler track (7); the crawler track (7) envelops the supporting wheel (4); and the crawler track (7) is a rubber crawler track.

7. A weight-supporting and shock-absorbing mechanism according to claim 1, characterized in that: The limit block (501) comprises an ear plate (5011) and a U-shaped plate (5012); the ear plate (5011) is arranged at the opening of the U-shaped plate (5012); a clamping groove (5013) is formed between the ear plate (5011) and the two side walls of the U-shaped plate (5012); the vertical rod (302) of the crank arm (3) has a rectangular cross-section, and its width matches the clamping groove (5013); the limit block (501) is clamped on the vertical rod (302) through the clamping groove (5013); a screw through hole is arranged on the ear plate (5011), and the limit block (501) is fastened to the vertical rod (302) through the screw.

8. A tracked all-terrain vehicle, characterized in that: It comprises the weight-supporting and shock-absorbing mechanism as described in any one of claims 1 to 7.

Images