Chassis lifting structure for a vehicle

Abstract

The application discloses a chassis lifting structure of a vehicle, which is connected with a vehicle frame, and comprises a first swing arm and a second swing arm, wherein the first swing arm and the second swing arm are hingedly connected to the vehicle frame in an up-down mode, a telescopic structure is arranged on each of the first swing arm and the second swing arm, a first support frame is arranged between the free ends of the first swing arm and the second swing arm, a shock absorber is arranged between the vehicle frame and the second swing arm, the two ends of the shock absorber are hingedly connected to the vehicle frame and the second swing arm respectively, the hinged end of the shock absorber is replaceable with a hinged point between the vehicle frame, the second swing arm is in a U shape, the shock absorber passes through a U-shaped slot of the second swing arm, and wheels are arranged on the first support frame.

Description

Technical Field

[0001] This invention belongs to the field of automotive chassis technology, and more specifically relates to a chassis lifting structure for a golf cart. Background Technology

[0002] The swing arm length of existing traditional golf cart chassis is not adjustable. Some customers require a higher chassis, which necessitates a chassis replacement. The replacement process first requires the removal of exterior parts such as the front bumper and front cover. Protecting these exterior parts during disassembly is a significant issue. Carelessness can easily lead to scratches on the surface of the exterior parts, causing defects and requiring secondary paint repainting, thus increasing additional costs.

[0003] In addition, due to the increased chassis height, the control arms, shock absorbers, and the entire steering gear on the frame need to be removed and replaced with new control arms, shock absorbers, and the entire steering gear. The disassembly and assembly of each component is quite complicated and takes a long time. The customer has to bear the cost of the new components. In addition to the disassembly and assembly costs, the cost of raising the vehicle chassis is relatively large. The replaced ordinary control arms and shock absorbers can only be left idle, resulting in waste and increasing costs invisibly.

[0004] The aforementioned traditional chassis lifting solutions are inefficient, time-consuming, and expensive. Excessive disassembly and assembly of parts can easily damage some easily scratched components, resulting in maintenance costs. Summary of the Invention

[0005] To address the shortcomings of existing technologies, this invention provides a chassis lifting structure for vehicles, which improves lifting efficiency and saves lifting costs.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a chassis lifting structure for a vehicle, the lifting structure being connected to a vehicle frame, the lifting structure including a first swing arm and a second swing arm, the first swing arm and the second swing arm being hinged vertically to the vehicle frame, both the first swing arm and the second swing arm being provided with a telescopic structure, a first support frame being provided between the free ends of the first swing arm and the second swing arm, a shock absorber being provided between the vehicle frame and the second swing arm, the two ends of the shock absorber being hinged to the vehicle frame and the second swing arm respectively, the hinge point of the shock absorber being replaceable with the hinge point between the shock absorber and the vehicle frame, the second swing arm being U-shaped, the shock absorber passing through the U-shaped groove of the second swing arm, and a wheel being provided on the first support frame.

[0007] Furthermore, the telescopic structure includes a fixed sleeve with internal threads and an adjusting screw threadedly connected to the fixed sleeve. The fixed sleeve is fixedly connected to the swing arm, and the end of the adjusting screw is provided with a hinge block, which is hinged to the vehicle frame.

[0008] Furthermore, a fastening nut is threaded onto the adjusting screw, and the fastening nut is located between the fixed sleeve and the hinge block, and is in close contact with the fixed sleeve.

[0009] Furthermore, the hinge block is provided with a pivot hole, and nylon bushings are provided at both ends of the pivot hole. An inner liner sleeve is provided between the two nylon bushings. A bushing end cap is provided at the end of the nylon bushing. A support shaft is threaded through the pivot hole, and the support shaft is detachably connected to the vehicle frame.

[0010] Furthermore, a second support frame is provided on the vehicle frame, and several hinge areas of different heights are provided on both sides of the second support frame, with the shock absorber hinged to one of the hinge areas.

[0011] Furthermore, two opposing first support frames on the vehicle frame are provided with rotatable bogies, and wheels are rotatably connected to the bogies. Wheels are rotatably connected to the other two opposing first support frames on the vehicle frame. The bogies are connected to the vehicle's steering gear.

[0012] Furthermore, a linkage mechanism is provided between the bogie and the steering gear. The linkage mechanism includes a first connecting rod, a second connecting rod, and a third connecting rod. The first connecting rod and the second connecting rod are ball-jointed, the second connecting rod and the third connecting rod are threaded together, the third connecting rod is ball-jointed with the steering gear, and a fourth connecting rod can be threaded between the second connecting rod and the third connecting rod.

[0013] A method for lifting the chassis of a vehicle involves installing a lifting structure on the chassis frame. The method for lifting the vehicle chassis is as follows:

[0014] 1. Use several jacks to lift the chassis, raising all the wheels off the ground to a certain height, and then release the shock absorbers.

[0015] 2. Remove all hinges between the second control arm and the frame, loosen the fastening nut on the adjusting screw of the second control arm, then rotate the adjusting screw to extend it a certain length, and then tighten the fastening nut.

[0016] 3. Disconnect the first connecting rod from the bogie, then remove the second connecting rod from the third connecting rod, connect a fourth connecting rod to the third connecting rod, and then connect the second connecting rod to the fourth connecting rod;

[0017] 4. Remove all hinges between the shock absorbers and the second support frame;

[0018] 5. Rotate the first control arm to re-hinge all the second control arms to the frame;

[0019] 6. Rehinge all shock absorbers to the second support frame, and hinge them to the lower hinge area of ​​the second support frame.

[0020] 7. Remove all hinges between the first control arm and the frame, loosen the fastening nut on the adjusting screw of the first control arm, then rotate the adjusting screw to extend it a certain length, and then tighten the fastening nut.

[0021] 8. Re-hinge all first control arms to the frame;

[0022] 9. Reconnect all first connecting rods to the bogie;

[0023] 10. Remove the jack. Once the wheels are on the ground, the height between the wheels and the frame will increase, thus raising the vehicle chassis.

[0024] Compared with the prior art, the beneficial effects of the present invention are as follows: By setting a telescopic structure between the first and second control arms and the vehicle frame, the cost of replacing new control arms can be saved while ensuring vehicle safety performance, improving chassis lifting efficiency and saving time costs; multiple shock absorber mounting points of different heights are added to the vehicle frame, so when the vehicle chassis needs to be raised, the shock absorbers only need to be replaced and installed at the new mounting points, saving the cost of replacing new shock absorbers and improving shock absorber installation efficiency; the linkage mechanism between the steering gear and the wheel bogie is modified to meet the requirements of shock absorber stroke when the chassis is raised, so only one connecting rod needs to be added when the chassis is raised, without replacing the entire steering gear, saving steering gear replacement costs, improving steering gear adjustment efficiency, and saving time costs. Attached Figure Description

[0025] Figure 1 This is a three-dimensional structural diagram of the chassis lifting structure of the present invention;

[0026] Figure 2 This is a three-dimensional structural schematic diagram of the chassis lifting structure of the present invention from another perspective;

[0027] Figure 3 This is a front structural diagram of the chassis lifting structure of the present invention;

[0028] Figure 4 This is a schematic diagram of the first swing arm in the chassis lifting structure of the present invention (with the adjusting screw not extended);

[0029] Figure 5 A schematic diagram of the first swing arm in the chassis lifting structure of the invention (adjusting screw extended state);

[0030] Figure 6 This is a schematic diagram of the bottom structure of the first swing arm in the chassis lifting structure of the present invention;

[0031] Figure 7This is a schematic diagram of the second swing arm in the chassis lifting structure of the present invention;

[0032] Figure 8 This is an exploded view of the adjusting screw in the chassis lifting structure of the present invention;

[0033] Figure 9 This is an exploded view of the linkage mechanism in the chassis lifting structure of the present invention.

[0034] Reference numerals: 1. Chassis; 2. First control arm; 3. Second control arm; 4. First support frame; 5. Shock absorber; 6. Fixed sleeve; 7. Adjusting screw; 8. Hinge block; 9. Fastening nut; 10. Shaft hole; 11. Nylon bushing; 12. Inner liner sleeve; 13. Bushing end cap; 14. Second support frame; 15. Bogie; 16. Steering gear; 17. First connecting rod; 18. Second connecting rod; 19. Third connecting rod; 20. Fourth connecting rod; 21. Screw clearance groove; 22. U-shaped groove; 24. Hinge ring; 25. Fixed ball. Detailed Implementation

[0035] In the description of this invention, it should be noted that the directional terms such as "center", "horizontal (X)", "longitudinal (Y)", "vertical (Z)", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", and "counterclockwise" indicate the orientation and positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. They should not be construed as limiting the specific protection scope of this invention.

[0036] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features. Thus, the use of "first" and "second" to define a feature may explicitly or implicitly include one or more of that feature. In the description of this invention, "several" or "a number" means two or more, unless otherwise explicitly specified.

[0037] Reference Figures 1 to 9 The present invention will be further described below.

[0038] For ease of understanding, see attached Figures 1 to 3 The vehicle chassis was displayed on the same frame in two states: before and after lifting.

[0039] A chassis lifting structure for a vehicle is provided. The lifting structure is connected to a vehicle frame 1. The lifting structure includes a first swing arm 2 and a second swing arm 3, which are hinged vertically to the vehicle frame 1. Both the first swing arm 2 and the second swing arm 3 are provided with telescopic structures. A first support frame 4 is provided between the free ends of the first swing arm 2 and the second swing arm 3. A shock absorber 5 is provided between the vehicle frame 1 and the second swing arm 3. The two ends of the shock absorber 5 are respectively hinged to the vehicle frame 1 and the second swing arm 3. The hinged end of the shock absorber 5 can be replaced with the hinge point between it and the vehicle frame 1. The second swing arm 3 is U-shaped, and the shock absorber 5 passes through the U-shaped groove 22 of the second swing arm 3. A wheel (not shown in the figure) is provided on the first support frame 4.

[0040] like Figure 1 As shown in the figure, in this embodiment, the shock absorber 5 is preferably a spring hydraulic shock absorber 5.

[0041] like Figure 1 As shown in the preferred embodiment, the telescopic structure includes a fixed sleeve 6 with internal threads and an adjusting screw 7 threadedly connected to the fixed sleeve 6. The fixed sleeve 6 is fixedly connected to the swing arm, and the end of the adjusting screw 7 is provided with a hinge block 8, which is hinged to the frame 1.

[0042] like Figure 1 As shown in this embodiment, preferably, both the first swing arm 2 and the second swing arm 3 are provided with a plurality of weight-reducing holes and reinforcing ribs.

[0043] In this preferred embodiment, the fixed sleeve 6 is fixedly connected to the swing arm by welding.

[0044] like Figure 1 As shown in the preferred embodiment, the first swing arm 2 and the second swing arm 3 are both provided with U-shaped grooves 22, the fixed sleeve 6 is located in the U-shaped grooves 22, the first swing arm 2 and the second swing arm 3 are both provided with screw clearance grooves 21 corresponding to the U-shaped grooves 22, the adjusting screw 7 can extend into the screw clearance groove 21, and when the adjusting screw 7 is not extended, the end of the adjusting screw 7 abuts against the bottom surface of the screw clearance groove 21.

[0045] like Figure 1 As shown in this preferred embodiment, the adjusting screw 7 is threaded with a fastening nut 9. The fastening nut 9 is located between the fixed sleeve 6 and the hinge block 8 and is in close contact with the fixed sleeve 6. When it is necessary to rotate the adjusting screw, the fastening nut 9 is loosened to separate it from the fixed sleeve 6. After the adjusting screw 7 has extended, the fastening nut 9 is tightened again to make it in close contact with the fixed sleeve 6.

[0046] like Figure 1As shown in the preferred embodiment, the hinge block 8 is provided with a pivot hole 10, and nylon bushings 12 are provided at both ends of the pivot hole 10. An inner liner sleeve is provided between the two nylon bushings 12, and a bushing end cap 13 is provided at the end of the nylon bushing 12. A support shaft (not shown in the figure) passes through the pivot hole 10. The support shaft is detachably connected to the frame 1. The frame 1 is provided with a connection hole for the support shaft. When the connection between the adjusting screw 7 and the frame 1 is removed, the support shaft can be removed from the frame 1 and pulled out from the inner liner sleeve, thereby separating the hinge block 8 from the frame 1.

[0047] like Figure 1 As shown in this embodiment, preferably, the frame 1 is provided with a second support frame 14, and the two sides of the second support frame 14 are respectively provided with a number of hinge areas of different heights. The shock absorber 5 is hinged to one of the hinge areas, and the hinge areas of different heights can be matched with the lifting height of the chassis.

[0048] In this preferred embodiment, with the hinge position between the shock absorber 5 and the frame 1 remaining unchanged, the adjusting screws 7 on the first swing arm 2 and the second swing arm 3 are extended, which changes the shock absorption effect of the shock absorber 5.

[0049] like Figure 1 As shown in this embodiment, preferably, two opposing first support frames 4 on the frame 1 are provided with rotatable bogies 15, and wheels are rotatably connected to the bogies 15. Wheels are rotatably connected to the other two opposing first support frames 4 on the frame 1. The bogies 15 are connected to the vehicle's steering gear 16 to achieve the lifting of the chassis at the vehicle's steering wheels.

[0050] like Figure 1 As shown in the preferred embodiment, a linkage mechanism is provided between the bogie 15 and the steering gear 16. The linkage mechanism includes a first connecting rod 17, a second connecting rod 18, and a third connecting rod 19. The first connecting rod 17 and the second connecting rod 18 are ball-jointed, the second connecting rod 18 and the third connecting rod 19 are threaded together, the third connecting rod 19 is ball-jointed with the steering gear 16, and a fourth connecting rod 20 can be threaded between the second connecting rod 18 and the third connecting rod 19.

[0051] like Figure 1 As shown in the preferred embodiment, the third connecting rod 19 is provided with a hinge ring 24, the steering gear 16 is provided with a fixed ball 25, the inner wall of the hinge ring 24 is spherical, and the hinge ring 24 is sleeved on the fixed ball 25 to achieve hinge.

[0052] A method for lifting the chassis of a vehicle, using the aforementioned lifting structure, includes lifting the chassis at the steering wheels and lifting the chassis at the drive wheels. The method for lifting the chassis at the steering wheels is as follows:

[0053] 1. Use several jacks to lift the chassis at the steering wheel, so that the steering wheel is off the ground at a certain height, and release the shock absorber 5.

[0054] 2. Remove the hinge between the second swing arm 3 and the frame 1, loosen the fastening nut 9 on the adjusting screw 7 on the second swing arm 3, then rotate the adjusting screw 7 to extend the adjusting screw 7 to a certain length, and then tighten the fastening nut 9 after it extends.

[0055] 3. Disconnect the first connecting rod 17 from the bogie 15, then remove the second connecting rod 18 from the third connecting rod 19, connect a fourth connecting rod 20 to the third connecting rod 19, and then connect the second connecting rod 18 to the fourth connecting rod 20.

[0056] 4. Remove the hinge between the shock absorber 5 and the second support frame 14;

[0057] 5. Rotate the first swing arm 2 to re-hinge the second swing arm 3 with the frame 1;

[0058] 6. Re-hinge the shock absorber 5 onto the second support frame 14, and make sure that the hinge on the second support frame 14 is located in the lower hinge area.

[0059] 7. Remove the hinge between the first swing arm 2 and the frame 1, loosen the fastening nut 9 on the adjusting screw 7 on the first swing arm 2, then rotate the adjusting screw 7 to extend the adjusting screw 7 to a certain length, and then tighten the fastening nut 9 after it extends.

[0060] 8. Re-hinge the first swing arm 2 to the frame 1;

[0061] 9. Reconnect the first connecting rod 17 to the bogie 15;

[0062] 10. Remove the jack. After the wheel touches the ground, the height between the steering wheel and frame 1 can be increased, that is, the vehicle chassis at that point can be raised.

[0063] The method for lifting the chassis at the drive wheels is as follows:

[0064] 1. Use several jacks to lift the chassis at the steering wheel, so that the steering wheel is off the ground at a certain height, and release the shock absorber 5.

[0065] 2. Remove the hinge between the second swing arm 3 and the frame 1, loosen the fastening nut 9 on the adjusting screw 7 on the second swing arm 3, then rotate the adjusting screw 7 to extend the adjusting screw 7 to a certain length, and then tighten the fastening nut 9 after it extends.

[0066] 3. Remove the hinge between the shock absorber 5 and the second support frame 14;

[0067] 4. Rotate the first swing arm 2 to re-hinge the second swing arm 3 with the frame 1;

[0068] 5. Re-hinge the shock absorber 5 onto the second support frame 14, and make sure that the hinge on the second support frame 14 is located in the lower hinge area.

[0069] 6. Remove the hinge between the first swing arm 2 and the frame 1, loosen the fastening nut 9 on the adjusting screw 7 on the first swing arm 2, then rotate the adjusting screw 7 to extend the adjusting screw 7 to a certain length, and then tighten the fastening nut 9 after it extends.

[0070] 7. Re-hinge the first swing arm 2 to the frame 1;

[0071] 8. Remove the jack. After the wheel is on the ground, the height between the drive wheel and frame 1 can be increased, that is, the vehicle chassis at that point can be raised.

[0072] Once the chassis, including the steering wheels and drive gears, is raised, the entire vehicle body can be lifted, meeting customers' requirements for a high chassis.

[0073] The aforementioned chassis lifting method is simple, efficient, and reduces time and parts costs.

[0074] The above description is merely a preferred embodiment of the present invention. The scope of protection of the present invention is not limited to the above embodiments. All technical solutions falling within the scope of the present invention's concept are within the scope of protection of the present invention. It should be noted that for those skilled in the art, any improvements and modifications made without departing from the principles of the present invention should also be considered within the scope of protection of the present invention.

Claims

1. A chassis lifting arrangement for a vehicle, characterised in that: The lifting structure is connected with the frame, and comprises first and second swing arms which are hingedly connected to the frame, a first support frame arranged between the free ends of the first and second swing arms, and a shock absorber arranged between the frame and the second swing arm and hingedly connected to the frame and the second swing arm at two ends thereof, wherein the hinged end of the shock absorber is replaceable with respect to the hinged point between the frame and the second swing arm, the second swing arm is in a U shape, the shock absorber passes through the U-shaped slot of the second swing arm, and the first support frame is provided with wheels. The frame is provided with a second support frame, and a plurality of hinged areas of different heights are arranged on the two sides of the second support frame, and the shock absorber is hingedly connected to one of the hinged areas. Rotatable steering frames are arranged on two opposite first support frames of the frame, and wheels are rotatably connected to the steering frames; wheels are rotatably connected to the other two opposite first support frames of the frame, and the steering frames are connected with a steering mechanism of the vehicle. A linkage mechanism is arranged between the steering frames and the steering mechanism, and the linkage mechanism comprises a first connecting rod, a second connecting rod and a third connecting rod, the first connecting rod is hingedly connected to the second connecting rod, the second connecting rod is threadedly connected to the third connecting rod, and the third connecting rod is hingedly connected to the steering mechanism; when the chassis is lifted, a fourth connecting rod is arranged between the second connecting rod and the third connecting rod through thread connection.

2. The chassis lifting arrangement of a vehicle as claimed in claim 1, characterised in that: The telescopic structure comprises a fixed sleeve with internal threads and an adjusting screw threadedly connected to the fixed sleeve, the fixed sleeve is fixedly connected to the swing arm, and the end of the adjusting screw is provided with a hinged block which is hingedly connected to the frame.

3. A vehicle's chassis lifting arrangement according to claim 2, characterised in that: A fastening nut is threadedly connected to the adjusting screw, and the fastening nut is located between the fixed sleeve and the hinged block and tightly contacts the fixed sleeve.

4. The chassis lifting arrangement of claim 3, wherein: A rotating shaft hole is arranged on the hinged block, nylon bushings are arranged at the two ends of the rotating shaft hole, an inner bushing sleeve is arranged between the two nylon bushings, end covers are arranged at the ends of the nylon bushings, and a support shaft is arranged in the rotating shaft hole and detachably connected to the frame.

5. A method of lifting a chassis of a vehicle, characterised by: A lifting structure as claimed in claim 4 is arranged on the chassis of the frame, and the lifting method of the vehicle chassis is as follows: (1) a plurality of jacks are used to lift the chassis of the frame, the chassis is lifted to make all the wheels off the ground by a certain height, and the shock absorber is loosened; (2) the hinged connection between all the second swing arms and the frame is removed, the fastening nut on the adjusting screw of the second swing arm is loosened, the adjusting screw is rotated to extend by a certain length, and the fastening nut is tightened after the extension; (3) the connection between the first connecting rod and the steering frame is removed, the second connecting rod is detached from the third connecting rod, a fourth connecting rod is connected to the third connecting rod, and the second connecting rod is connected to the fourth connecting rod; (4) the hinged connection between all the shock absorbers and the second support frame is removed; (5) the first swing arm is rotated, and all the second swing arms are hingedly connected to the frame again; (6) all the shock absorbers are hingedly connected to the second support frame, and the hinged connection is made to the lower hinged area of the second support frame. (7) remove all the first swing arm and frame hinge, loosen the first swing arm on the adjusting screw on the fastening nut, and then rotate the adjusting screw to extend a certain length, and then tighten the fastening nut after extension; (8) re-hinge all the first swing arm with the frame; (9) re-connect all the first connecting rod on the bogie; (10) take out the jack, and the wheel can be lifted after the wheel is placed on the ground, that is, the vehicle chassis is lifted.

Images