Liftable suspension strut

Abstract

The invention relates to a lifting type suspension strut, which belongs to the technical field of vehicle suspensions, and comprises a shock absorber and a suspension spring, and the suspension spring is sleeved on the shock absorber; the output mechanism is connected with the shock absorber, and the output mechanism is used for driving the shock absorber to ascend or descend; the output mechanism comprises a hydraulic cylinder, the hydraulic cylinder is provided with a telescopic shaft, and the telescopic shaft is connected with a shock absorber. By means of the structure, when the lifting type suspension supporting column is installed on a vehicle, the shock absorber and the suspension spring can be driven to ascend and descend so as to control a vehicle body chassis to ascend and descend according to needs, the passing performance of the vehicle on various grounds can be improved, the vehicle body can be leveled when the vehicle is parked on a slope or a hollow road surface, and the vehicle body can be conveniently and rapidly parked. And the vehicle using experience and the driving safety of a driver and passengers are improved.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of vehicle suspension, and particularly relates to a liftable suspension strut. BACKGROUND

[0002] The suspension strut on a vehicle refers to a support structure formed by sleeving a suspension spring outside a shock absorber, wherein the suspension spring is used for supporting the weight of a vehicle body and buffering road impact, and the shock absorber is used for inhibiting the reciprocating vibration of the suspension spring. The suspension spring and the shock absorber jointly function to not only buffer road bumps but also constrain the movement track of a wheel and inhibit the bounce of the spring, so that the vehicle runs more smoothly and is more stable in control.

[0003] The suspension strut in the prior art has no lifting function in addition to the elastic expansion function, that is, the suspension strut cannot be used to lift the vehicle body. When encountering damaged road surfaces, muddy road surfaces, waterlogged road surfaces and mountain road surfaces that some camping / off-road enthusiasts will go to, most vehicles with low chassis are prone to chassis scratching, and in severe cases, the vehicle may be damaged. SUMMARY

[0004] The present application provides a liftable suspension strut which not only has the function of the existing suspension strut but also can use an output mechanism to drive the overall lifting or lowering of the suspension strut, thereby driving the lifting or lowering of the vehicle chassis.

[0005] The present application is implemented by the following technical scheme: a liftable suspension strut, comprising:

[0006] a shock absorber and a suspension spring, the suspension spring being sleeved on the shock absorber;

[0007] an output mechanism connected with the shock absorber, the output mechanism being used to drive the lifting or lowering of the shock absorber.

[0008] Further, in order to better implement the present application, the output mechanism comprises:

[0009] a hydraulic cylinder, the hydraulic cylinder being provided with a telescopic shaft, the telescopic shaft being connected with the shock absorber.

[0010] Further, in order to better implement the present application, the telescopic shaft is a hollow shaft with a top end penetrating through, and a sliding block adapted to the inner cylinder of the hydraulic cylinder is fixedly connected to the bottom end of the telescopic shaft, the sliding block being slidingly installed in the inner cylinder of the hydraulic cylinder, the suspension spring being sleeved on the upper section of the shock absorber, and the lower section of the shock absorber being inserted into the inside of the telescopic shaft and fixedly connected with the sliding block.

[0011] Further, in order to better implement the present application, the telescopic shaft comprises:

[0012] The first straight cylinder is fixedly connected with the sliding block at the bottom end;

[0013] The connecting limiting block is fixedly connected with the first straight cylinder at the top end;

[0014] The second straight cylinder is fixedly connected with the connecting limiting block at the bottom end;

[0015] The connecting limiting block is in abutment with the top end of the hydraulic cylinder when the shock absorber drops to the bottom point.

[0016] Further, in order to better realize the present application, the bottom end of the hydraulic cylinder is provided with a valve for controlling the hydraulic oil to enter or exit the hydraulic cylinder, and a sealing assembly is further installed at the upper part of the hydraulic cylinder, which is used to avoid the leakage of hydraulic oil from the upper part of the hydraulic cylinder.

[0017] Further, in order to better realize the present application, a guide sleeve adapted to the first straight cylinder is further installed at the upper part of the hydraulic cylinder, and the first straight cylinder is slidingly inserted into the guide sleeve;

[0018] The sealing assembly comprises a first sealing ring and a second sealing ring, the first sealing ring is installed between the first straight cylinder and the guide sleeve, and the second sealing ring is installed between the guide sleeve and the inner wall of the upper part of the hydraulic cylinder.

[0019] Further, in order to better realize the present application, the sealing assembly further comprises an oil seal, which is installed between the first straight cylinder and the inner wall of the upper part of the hydraulic cylinder, and the oil seal is located above the guide sleeve.

[0020] Further, in order to better realize the present application, an opening is formed through the top end of the hydraulic cylinder, and the cylinder body of the hydraulic cylinder comprises a first section and a second section from bottom to top, the diameter of the second section is greater than that of the first section, and the first section and the second section are connected by a connecting section, and the sliding block is slidingly installed in the first section.

[0021] The hydraulic cylinder further comprises a gland and a gasket, the gland is screwed to the top end of the second section, the gland is provided with a through hole adapted to the first straight cylinder, the first straight cylinder is slidingly inserted into the through hole, the guide sleeve and the oil seal are both installed in the second section, and the gasket is installed between the gland and the oil seal.

[0022] Further, in order to better realize the present application, a positioning structure is further provided between the first section and the sliding block.

[0023] Further, in order to better realize the present application, the positioning structure is a long strip-shaped protrusion fixed to the inner wall of the first section, the long strip-shaped protrusion extends in the up-down direction, a guide groove adapted to the long strip-shaped protrusion is formed in the outer wall of the sliding block, and the long strip-shaped protrusion is slidingly inserted into the guide groove.

[0024] Compared with the prior art, the present application has the following beneficial effects:

[0025] The liftable suspension strut provided by the present application comprises a shock absorber, a suspension spring sleeved outside the shock absorber, and an output mechanism connected with the shock absorber and used for driving the shock absorber to ascend or descend, so that the whole suspension strut can ascend or descend.

[0026] Through the above structure, when the vehicle body needs to be lifted, the output mechanism is used to drive the shock absorber and the suspension spring to ascend, because the suspension spring bears the weight of the vehicle body, and the weight of the vehicle body does not actually change, so when the suspension spring ascends, the whole vehicle body is driven to ascend upwards, so that the distance between the vehicle chassis and the ground is larger, and the vehicle can pass through the uneven ground more smoothly; when the vehicle is running on the flat ground, the output mechanism is used to drive the shock absorber and the suspension spring to descend, so that the vehicle chassis descends. In this way, the passing performance of the vehicle provided by the present application on various grounds is better. Moreover, the vehicle body can be leveled when parking on the slope or the pothole road, and the driving experience and driving safety of the driver and the passenger are improved. BRIEF DESCRIPTION OF DRAWINGS

[0027] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or the prior art description. Obviously, the drawings in the following description only some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained without creative labor on the basis of these drawings.

[0028] Fig. 1 is a structure schematic view of the liftable suspension strut provided by the present application;

[0029] Fig. 2 is a sectional view of the liftable suspension strut provided by the present application.

[0030] In the drawings:

[0031] 10-Shock absorber, 20-Suspension spring, 30-Hydraulic cylinder, 31-First section, 32-Second section, 33-Connecting section, 34-Gland, 35-Washer, 40-Valve, 50-Guide sleeve, 60-Sealing assembly, 61-First sealing ring, 62-Second sealing ring, 63-Oil seal, 70-Telescopic shaft, 71-First straight cylinder, 72-Connecting limit block, 73-Second straight cylinder, 80-Slider, 90-Long strip protrusion. Detailed Implementation

[0032] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of this invention will be described in detail below. Obviously, the described embodiments are merely some embodiments of this invention, and not all embodiments. Based on the embodiments of this invention, all other implementation methods obtained by those skilled in the art without creative effort are within the scope of protection of this invention.

[0033] Example:

[0034] like Figs. 1-2 As shown, this embodiment provides a liftable suspension strut including a shock absorber 10 and a suspension spring 20 sleeved on the shock absorber 10. It also includes an output mechanism connected to the shock absorber 10, which drives the shock absorber 10 to rise or fall, thereby allowing the entire suspension strut to rise or fall. Similar to existing suspension struts, a connecting plate for connecting to the vehicle chassis is provided at the top of the shock absorber 10, and a support plate is provided on the outer wall of the middle portion of the shock absorber 10. The two ends of the suspension spring 20 abut against the support plate and the connecting plate, respectively.

[0035] With the above structure, when the vehicle body needs to be raised, the output mechanism drives the shock absorber 10 and suspension spring 20 to rise. Since the suspension spring 20 bears the weight of the vehicle body, and the actual weight of the vehicle body has not changed, when the suspension spring 20 rises, it drives the entire vehicle body upward, thereby increasing the distance between the vehicle chassis and the ground, and thus allowing the vehicle to pass more smoothly on uneven ground. When the vehicle is driving on flat ground, the output mechanism drives the shock absorber 10 and suspension spring 20 to descend, thereby lowering the vehicle chassis. In this way, the vehicle provided by this invention has better passability on various ground surfaces. It can also level the vehicle body when parking on slopes or potholes, improving the driving experience and safety for passengers.

[0036] It is easy to understand that, compared with the prior art, the suspension strut provided by the embodiment includes a shock absorber 10 that can be lifted, while the shock absorber 10 in the prior art suspension strut is usually fixedly installed between the vehicle body chassis and the vehicle wheel. In addition, when the output mechanism is not in operation, the suspension strut in the embodiment has the same function as the suspension strut used on the prior art vehicle.

[0037] Optionally, the output mechanism in the embodiment includes a hydraulic cylinder 30 configured with a telescopic shaft 70 connected with the shock absorber 10, and the telescopic shaft 70 of the hydraulic cylinder 30 is in the up-down direction. In this way, when the hydraulic cylinder 30 drives the telescopic shaft 70 to extend or retract by changing the hydraulic pressure, the shock absorber 10 is lifted when the telescopic shaft 70 extends, and the shock absorber 10 is lowered when the telescopic shaft 70 retracts. Of course, the output mechanism described above can also be other lifting mechanisms that can be controlled electrically or remotely, such as a hydraulic jack.

[0038] Optionally, the telescopic shaft 70 of the hydraulic cylinder 30 is a hollow shaft, and a sliding block 80 matched with the inner cylinder of the hydraulic cylinder 30 is fixedly connected to the bottom end of the telescopic shaft 70. The sliding block 80 is slidingly installed in the inner cylinder of the hydraulic cylinder 30, the suspension spring 20 is sleeved on the upper section of the shock absorber 10, the lower section of the shock absorber 10 is inserted into the inside of the telescopic shaft 70 and fixedly connected with the sliding block 80, and of course, the lower section of the shock absorber 10 can also be fixedly connected with the lower inner wall of the telescopic shaft 70. Through the above structure, the sliding block 80 can not only be understood as the piston of the hydraulic cylinder 30, but also simultaneously block the bottom end of the shock absorber 10 from below, and the shock absorber 10 can be a hydraulic shock absorber 10. In addition, after the lower section of the shock absorber 10 is inserted into the inside of the telescopic shaft 70 of the hydraulic cylinder 30 and fixedly connected with the telescopic shaft 70, the structure is more compact, and the connection between the shock absorber 10 and the telescopic shaft 70 is more reliable. In this case, the area above the sliding block 80 in the hydraulic cylinder 30 is a rod cavity, and the area below the sliding block 80 is a rodless cavity.

[0039] Of course, the telescopic shaft 70 of the hydraulic cylinder 30 can also be a conventional solid shaft, and the top end of the solid shaft is fixedly connected with the bottom end of the shock absorber 10.

[0040] Specifically, the telescopic shaft 70 includes a first straight cylinder body 71, a connecting limiting block 72, and a second straight cylinder body 73, wherein:

[0041] The bottom end of the first straight cylinder 71 is fixedly connected with the sliding block 80, the connecting limiting block 72 is fixedly connected at the top end of the first straight cylinder 71, and the bottom end of the second straight cylinder 73 is fixedly connected with the connecting limiting block 72. When the damper 10 is lowered to the lowest point, the connecting limiting block 72 abuts against the top end of the hydraulic cylinder 30. The connecting modes between the first straight cylinder 71 and the connecting limiting block 72 and between the connecting limiting block 72 and the second straight cylinder 73 are both welding, and the connecting limiting block 72 is actually a ring-shaped block, and the connecting limiting block 72 is coaxially arranged with the first straight cylinder 71 and the second straight cylinder 73. It is easy to understand that the second straight cylinder 73 is always located outside the hydraulic cylinder 30, and the first straight cylinder 71 is a component that needs to enter and exit the hydraulic cylinder 30, so the surface smoothness of the first straight cylinder 71 and the process precision required for processing are both higher, and the material used also has certain requirements, while the second straight cylinder 73 only needs to wrap the damper 10 and has certain structural strength, so the first straight cylinder 71 and the second straight cylinder 73 can be produced by using different materials and processes, and then welded with the connecting limiting block 72 after production, which can save process cost and thus reduce production cost.

[0042] The lower part of the damper 10 is inserted into the bottom of the first straight cylinder 71 and fixedly connected with the first straight cylinder 71 or fixedly connected with the sliding block 80. Of course, the telescopic shaft 70 can also be made into a straight complete cylinder. In addition, the first straight cylinder 71 and the lower part of the damper 10 can also be an integral whole.

[0043] Optionally, a valve 40 is arranged at the bottom end of the hydraulic cylinder 30, which is used for the hydraulic oil to enter and exit the hydraulic cylinder 30. Specifically, when the valve 40 is disconnected, the hydraulic oil cannot enter and exit the hydraulic cylinder 30, and when the valve 40 is opened, the hydraulic oil can enter and exit the hydraulic cylinder 30. Actually, the inner bottom wall of the hydraulic cylinder 30 is provided with an oil port, the oil port is communicated with the valve 40, the valve 40 is connected with an oil pump through an oil pipe, and the oil pump is arranged in a hydraulic station. When it is needed to lift the vehicle body, the valve 40 and the oil pump are controlled to be opened, the oil pump pumps the hydraulic oil into the rodless cavity of the hydraulic cylinder 30, so as to drive the sliding block 80 and the telescopic shaft 70 to move upward, and then drive the damper 10 and the vehicle body chassis to be lifted upward; after being lifted to a suitable height, the valve 40 is controlled to be closed, and the hydraulic cylinder 30 is pressure-kept, so as to ensure that the vehicle body chassis can be kept at the current height; when it is needed to lower the height of the vehicle body chassis, the oil pump is closed and the valve 40 is opened, and under the action of the weight of the vehicle body, the hydraulic oil in the rodless cavity of the hydraulic cylinder 30 is pressed back to the hydraulic station. Of course, the oil can also be actively discharged by the oil pump.

[0044] In fact, the hydraulic cylinder 30 in the embodiment can be installed on the lower hanger, lower fork arm, fish tail plate bracket and other structures of the vehicle. The valve 40 can be an electromagnetic valve.

[0045] A sealing assembly 60 is further installed on the upper portion of the hydraulic cylinder 30, which is used to prevent the hydraulic oil from leaking from the upper portion of the hydraulic cylinder 30, so as to ensure the stable operation of the hydraulic cylinder 30.

[0046] In order to ensure that the first straight cylinder body 71 can stably slide up and down in the hydraulic cylinder 30, a guide sleeve adapted to the first straight cylinder body 71 is further installed on the upper portion of the hydraulic cylinder 30 in the embodiment, the guide sleeve extends in the up-down direction, and the first straight cylinder body 71 is slidably installed in the guide sleeve 50. By means of the guide sleeve 50, the up-down sliding of the first straight cylinder body 71 can be guided, and lateral deviation of the first straight cylinder body 71 during up-down sliding can be avoided as much as possible.

[0047] The sealing assembly 60 includes a first sealing ring 61 and a second sealing ring 62. The first sealing ring 61 is installed between the first straight cylinder body 71 and the guide sleeve 50, so as to seal the gap between the first straight cylinder body 71 and the guide sleeve 50. The second sealing ring 62 is installed between the guide sleeve 50 and the inner wall of the upper portion of the hydraulic cylinder 30, so as to seal the gap between the guide sleeve 50 and the inner wall of the upper portion of the hydraulic cylinder 30.

[0048] In order to further realize the sealing effect of the upper portion of the hydraulic cylinder 30, the sealing assembly 60 in the embodiment further includes an oil seal 63. It is worth noting that the oil seal 63 is a prior art, and therefore will not be described in detail here. The oil seal 63 is installed between the first straight cylinder body 71 and the inner wall of the upper portion of the hydraulic cylinder 30, and the oil seal 63 is located above the guide sleeve 50. In this way, the probability of the hydraulic oil being brought out of the hydraulic cylinder 30 due to the extension of the first straight cylinder body 71 out of the hydraulic cylinder 30 can be further reduced.

[0049] Optionally, an opening is formed through the top end of the hydraulic cylinder 30, and the cylinder body of the hydraulic cylinder 30 includes a first section 31 and a second section 32 from bottom to top. The diameter of the second section 32 is greater than that of the first section 31, and the first section 31 and the second section 32 are connected by a connecting section 33. In this case, the cylinder body of the hydraulic cylinder 30 is a stepped cylinder body with a large upper portion and a small lower portion. The sliding block 80 is slidably installed in the first section 31.

[0050] The hydraulic cylinder 30 further comprises a gland 34 and a gasket 35, the gland 34 is screwed on the top end of the second section 32, and the gland 34 is provided with a through hole which is adapted to the first straight cylinder 71, the first straight cylinder 71 is slidingly inserted into the through hole, the guide sleeve 50 and the oil seal 63 are both mounted in the second section 32, and the gasket 35 is mounted between the gland 34 and the oil seal 63. In this way, the gasket 35, the oil seal 63 and the guide sleeve 50 are pressed on the connecting section 33 by the gland 34, which facilitates disassembly and assembly. Of course, the above-mentioned gland 34 can also be bolted on the top end of the second section 32, in this case, a sealing ring needs to be mounted between the gland 34 and the top end of the second section 32.

[0051] In addition, in the present embodiment, the top end of the second section 32 of the hydraulic cylinder 30 can also be bent inward to form a retaining ring by extrusion deformation, and the retaining ring can be used instead of the above-mentioned gland 34 and gasket 35, but in this case, the oil seal 63 and the guide sleeve 50 cannot be disassembled during subsequent maintenance, and the telescopic shaft 70 and the sliding block 80 cannot be removed from the hydraulic cylinder 30.

[0052] In order to prevent the telescopic shaft 70 from rotating when it enters or exits the hydraulic cylinder 30, in the present embodiment, a positioning structure is further provided between the first section 31 of the hydraulic cylinder 30 and the sliding block 80, and the positioning structure allows the sliding block 80 to move linearly in the first section 31 and cannot rotate.

[0053] Alternatively, the positioning structure is a long strip-shaped protrusion 90 which is welded on the inner wall of the first section 31, the long strip-shaped protrusion 90 extends in the up-down direction, and a guide groove which is adapted to the long strip-shaped protrusion 90 is formed on the outer wall of the sliding block 80, and the long strip-shaped protrusion 90 is slidingly inserted into the guide groove. It is easy to understand that the guide groove extends through both ends of the sliding block 80.

[0054] Of course, the positioning structure can also be a positioning block which is integrally formed on the outer wall of the sliding block 80, in this case, a slide is provided on the inner wall of the first section 31, and the positioning block is slidingly inserted into the slide. In addition, when it is determined that the sliding block 80 will not rotate in the first section 31, the positioning structure can also not be provided, for example, the first section 31 is provided in an elliptical structure, or the sliding block 80 is provided in an elliptical structure and the inner hole of the first section 31 is provided as an elliptical hole.

[0055] The above is only a specific embodiment of the present application, but the protection scope of the present application is not limited thereto, any person skilled in the art can easily think of changes or replacements within the technical range disclosed in the present application, which should be covered within the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A liftable suspension strut, characterized in that Comprise: a shock absorber and a suspension spring, the suspension spring being sleeved on the shock absorber; an output mechanism connected with the shock absorber, the output mechanism being used for driving the shock absorber to rise or fall.

2. The lift-style suspension strut of claim 1 wherein, The output mechanism comprises: a hydraulic cylinder, the hydraulic cylinder being provided with a telescopic shaft connected with the shock absorber.

3. The liftable suspension strut according to claim 2, wherein: the telescopic shaft is a hollow shaft with a top end penetrating through, and a bottom end of the telescopic shaft is fixedly connected with a sliding block matched with an inner cylinder of the hydraulic cylinder, the sliding block being slidingly installed in the inner cylinder of the hydraulic cylinder, the suspension spring being sleeved on an upper section of the shock absorber, a lower section of the shock absorber being inserted into an inside of the telescopic shaft and fixedly connected with the sliding block.

4. The lift-style suspension strut of claim 3, wherein, The telescopic shaft comprises: a first straight cylinder body, a bottom end of the first straight cylinder body being fixedly connected with the sliding block; a connecting limiting block, the connecting limiting block being fixedly connected with a top end of the first straight cylinder body; a second straight cylinder body, a bottom end of the second straight cylinder body being fixedly connected with the connecting limiting block; when the shock absorber falls to a low point, the connecting limiting block abuts against a top end of the hydraulic cylinder.

5. The liftable suspension strut according to claim 4, wherein: a bottom end of the hydraulic cylinder is provided with a valve for controlling the hydraulic oil to enter or exit the hydraulic cylinder, and a sealing assembly is further installed on an upper portion of the hydraulic cylinder, the sealing assembly being used for avoiding leakage of the hydraulic oil from the upper portion of the hydraulic cylinder.

6. The liftable suspension strut according to claim 5, wherein: a guide sleeve matched with the first straight cylinder body is further installed on the upper portion of the hydraulic cylinder, and the first straight cylinder body is slidingly inserted into the guide sleeve; the sealing assembly comprises a first sealing ring and a second sealing ring, the first sealing ring being installed between the first straight cylinder body and the guide sleeve, and the second sealing ring being installed between the guide sleeve and an inner wall of the upper portion of the hydraulic cylinder.

7. The liftable suspension strut according to claim 6, wherein: the sealing assembly further comprises an oil seal, the oil seal being installed between the first straight cylinder body and the inner wall of the upper portion of the hydraulic cylinder, and the oil seal being located above the guide sleeve.

8. The liftable suspension strut according to claim 7, wherein: a top end of the hydraulic cylinder is penetrated to form an opening, and a cylinder body of the hydraulic cylinder comprises a first section and a second section from bottom to top, a diameter of the second section being greater than that of the first section, and the first section and the second section being connected through a connecting section, and the sliding block being slidingly installed in the first section; the hydraulic cylinder further comprises a gland and a gasket, the gland being screwed on a top end of the second section, the gland being provided with a through hole matched with the first straight cylinder body, the first straight cylinder body being slidingly inserted into the through hole, the guide sleeve and the oil seal being installed in the second section, and the gasket being installed between the gland and the oil seal.

9. The liftable suspension strut according to claim 8, wherein: a positioning structure is further arranged between the first section and the sliding block.

10. The liftable suspension strut according to claim 9, wherein: the positioning structure is a long strip-shaped protrusion fixed on the inner wall of the first section, the long strip-shaped protrusion extends in the up-down direction, a guide groove adapted to the long strip-shaped protrusion is formed on the outer wall of the sliding block, and the long strip-shaped protrusion is slidingly inserted into the guide groove.

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