Jack with rapidly adjustable height

Abstract

The utility model discloses a height fast adjustable jack which comprises a telescopic part and a load bearing part, the telescopic part is provided with a limiting plate, an outer pipe and an inner pipe, the inner pipe is located inside the outer pipe and movably connected with the outer pipe along the center line of the outer pipe, the outer pipe is of a hexagonal pipe structure, and the load bearing part is arranged on the outer pipe. The limiting plate is fixedly installed outside the outer pipe and is only connected with one side face, the extending direction of the limiting plate on the outer pipe is parallel to the center line of the outer pipe, a limiting hole is formed in the limiting plate, and the loading component is movably installed on the outer pipe. The jack capable of rapidly adjusting the height is provided with a flexible detachable structure, and the operation height adjusting process combining rough adjustment and fine adjustment is formed. The position change of the operation height of the load-carrying component is large and time-consuming during coarse adjustment, the change of the length of the telescopic component, namely the change of the overall operation height of the jack is small and time-consuming during fine adjustment, the effect of quickly adjusting the operation height is finally achieved, and time and labor are saved.

Description

Technical Field

[0001] The utility model relates to a high-speed adjustable jack. Background Art

[0002] The jack for trailer RV can provide stable, lasting and reliable support for the vehicle body when parked, and is an important accessory for trailer RV. The jack consists of three parts, namely the telescopic part, the load-bearing part and the supporting part. The telescopic part is provided with a hand crank, a screw mechanism, an outer tube and an inner tube. The inner tube is located inside the outer tube, and the two are connected by a screw mechanism. The hand crank is connected to the screw of the screw mechanism; after the hand crank is driven to rotate, the screw mechanism will drive the inner tube to move inside the outer tube, so that the telescopic part has a telescopic function. The load-bearing part is welded on the outer tube, which is directly connected to the vehicle body and is responsible for towing the vehicle body; the supporting part directly touches the ground when working, and it is fixedly connected to the inner tube. Driving the hand crank can increase or decrease the working height of the entire jack, but the working height of the jack changes little when the hand crank is turned, and it is usually necessary to turn the hand crank many times to obtain a significant change in the working height.

[0003] The jack has the characteristic of requiring a large number of turns of the hand crank to achieve a significant change in the working height, which has caused a usage defect in the use scenario of the jack's large-scale working height adjustment. For example, the jack's required working height in the previous parking lot was low, and the ground height changed after changing the parking lot. At this time, the jack's working height needs to be greatly increased. In this case, the required working height can only be obtained by turning the hand crank many times, and the adjustment speed is very slow. When adjusting the working height by a large margin, the time-consuming and labor-intensive use defect of this working height adjustment method is more obvious.

[0004] Invention Accommodation

[0005] The technical problem to be solved by the utility model is how to improve the speed of adjusting the working height, thereby obtaining a high-speed adjustable jack.

[0006] In order to solve the above technical problems, the utility model adopts the following technical scheme: the height-adjustable jack includes a telescopic component and a load-bearing component, the telescopic component is provided with an outer tube and an inner tube, the inner tube is located inside the outer tube and the inner tube is movably connected to the outer tube along the center line of the outer tube, the outer tube is a hexagonal tube structure, the outer surface of the outer tube is provided with six side surfaces, the telescopic component is also provided with a limit plate, the limit plate is fixedly mounted on the outside of the outer tube and is only connected to one of the side surfaces, the extension direction of the limit plate on the outer tube is parallel to the center line of the outer tube, the limit plate is provided with limit holes, the arrangement direction of the limit holes is parallel to the center line of the outer tube, the load-bearing component is movably mounted on the outer tube, the load-bearing component is provided with a pipe sleeve, a load-bearing seat, and a clamping piece, a through-type accommodating hole is provided inside the pipe sleeve, the accommodating hole includes a hole I for accommodating the outer tube and a hole II for accommodating the limit plate, the hole I is connected to the hole II, and the center line of the hole I Coincident with the center line of the outer tube, the outer contour shape of the cross section of the outer tube and the contour shape of the cross section of hole I are both regular hexagons, the outer contour shape of the cross section of the limit plate and the contour shape of the cross section of hole II are both rectangular, the contour shape of the cross section of the accommodating hole is the same as the contour shape of the cross section of the outer tube at the location where the limit plate is installed, the clamping member includes a limit column, a spring, and a handle, the cross section of the limit column is convex, the spring is sleeved on the limit column, the pipe sleeve is provided with a mounting hole, the cross section of the mounting hole is convex, the limit column is slidably installed in the mounting hole, the spring is located between the limit column and the pipe sleeve, one end of the limit column is located outside the pipe sleeve and is fixedly connected to the handle, the other end of the limit column extends into hole II, the load seat is fixedly installed on the pipe sleeve, the pipe sleeve is embedded in the accommodating hole through the outer tube and the limit plate, and the limit column is embedded in the limit hole and movably installed on the telescopic component.

[0007] In the above-mentioned height-adjustable jack, the load-bearing component is installed on the telescopic component in a flexible and detachable manner. There are multiple limit holes on the limit plate. When working, the outer tube presents a spatial posture extending in the vertical direction. When the limit columns of the load-bearing component are embedded in different limit holes, the load-bearing component can be at different working heights. In this way, during the large-scale height adjustment operation, the load-bearing component can be placed in a position close to the predetermined working height, and then the final adjustment is made through the hand crank, forming a working height adjustment process that combines coarse adjustment and fine adjustment; during coarse adjustment, the working height position of the load-bearing component changes greatly and takes less time, and during fine adjustment, the length change of the telescopic component, that is, the overall working height of the jack, changes little and takes less time, and finally a quick adjustment effect of the working height is obtained, which saves both time and effort.

[0008] The combined structure of the load-bearing component and the telescopic component in the height-adjustable jack also facilitates the packaging and storage of the jack. Before entering the use stage, the load-bearing component can be separated from the telescopic component, or at least the two can be packaged and stored independently; the sum of the packaging space occupied by each is smaller than the packaging space occupied by the assembled jack. This is because the components of the jack are spread out in all directions, and it is not a compact structure. The packaging space is often a rectangular structure, so the jack as a whole requires a larger packaging space. The structures of the various components of the jack are very compact and there is no transitional expansion structure in all directions, so the packaging space required for the various components of the jack is smaller, which ultimately makes the sum of the packaging space occupied by the various components smaller than the packaging space required for the jack as a whole.

[0009] When the load-bearing component or telescopic component is damaged, it can be removed separately and only needs to be replaced with a normal component to regain a usable jack. This method also makes it easy to disassemble the components for maintenance.

[0010] In this technical solution, the load-bearing component and the telescopic component are combined in a movable manner, and the strength of the combination of the load-bearing component and the telescopic component will inevitably affect the overall structural strength. This technical solution ensures the overall structural strength of the jack by strengthening the structural strength of the telescopic component. Including the outer tube with a hexagonal tube structure, the side structure of the outer tube surface well constructs a surface structure with uniform force, which is not easy to produce local force; the limit plate is combined with the outer tube to increase the structural strength of the outer tube.

[0011] In the structure of the outer tube and the limit plate of the hexagonal tube structure, even if the load-bearing component applies force to the outer tube in the circumferential direction around the center line of the outer tube, the outer tube is not easy to bend and deform, that is, the structural strength of the outer tube after the outer tube and the limit plate are combined is sufficient to ensure that it has a high anti-fragmentation strength. This makes the telescopic component have not only lateral structural strength, but also structural strength in the circumferential direction around the center line of the outer tube.

[0012] There are two preferred schemes for the hexagonal tube structure of the outer tube. One is that the outer tube is an inner and outer hexagonal tube structure, the inner contour shape of the cross section of the outer tube is a regular hexagon, and the outer contour shape and the inner contour shape of the cross section of the inner tube are both regular hexagons. Another preferred scheme is that the outer tube is an inner-circle outer hexagonal tube structure, the inner contour shape of the cross section of the outer tube is a circle, and the outer contour shape and the inner contour shape of the cross section of the inner tube are both circles.

[0013] In order to make the limiting plate have the characteristics of light weight while having sufficient structural strength, the edge of the limiting plate is provided with an arc-shaped notch, and the notch and the limiting hole are staggered in a direction parallel to the center line of the outer tube. The distribution characteristics of the notch relative to the limiting hole can greatly ensure the structural strength of the limiting plate and obtain the advantage of extremely light weight.

[0014] In order to improve the smoothness of the sliding action of the limit column in the installation hole, the pipe sleeve is provided with a guide column, the installation hole is located in the guide column, the center line of the installation hole coincides with the center line of the guide column, the handle is provided with a guide sleeve, the guide column extends into the guide sleeve, and the guide sleeve is slidably connected to the guide column. In this way, it can be avoided that the guide column only bears its own weight and the weight of the handle, and the friction between the limit column and the pipe sleeve is reduced.

[0015] In order to prevent granular dirt from entering between the guide sleeve and the guide column, a retaining ring is provided on the pipe sleeve and the guide sleeve is located inside the retaining ring.

[0016] A preferred embodiment of the load-carrying seat is that the top of the load-carrying seat is provided with a wavy loading surface corresponding to the loading operation. Another preferred embodiment of the load-carrying seat is that the load-carrying seat is provided with a turntable, and the rotation direction of the turntable is located in the vertical plane. Another preferred embodiment of the load-carrying seat is that the load-carrying seat is provided with an assembly hole, and the center line of the assembly hole is perpendicular to the center line of the outer tube. Another preferred embodiment of the load-carrying seat is that the outline of the load-carrying seat is triangular, and the center line of the load-carrying seat coincides with the center line of hole I.

[0017] The utility model adopts the above technical solution: the height-adjustable jack has a flexible detachable structure, forming an operating height adjustment process that combines coarse adjustment and fine adjustment; during coarse adjustment, the operating height position of the load-bearing component changes greatly and takes less time, while during fine adjustment, the length change of the telescopic component, that is, the overall operating height of the jack, changes slightly and takes less time, ultimately achieving a quick adjustment effect of the operating height, saving both time and effort. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The present invention will be further described below in conjunction with the accompanying drawings and specific implementation methods.

[0019] Figure 1 This is a schematic structural diagram of the first embodiment of the utility model;

[0020] Figure 2 This is a schematic structural diagram of a telescopic component of the first embodiment of the utility model;

[0021] Figure 3 This is a schematic structural diagram of the combination of the telescopic component and the load-bearing component of the first embodiment of the utility model;

[0022] Figure 4 for Figure 3 A partial enlarged view of

[0023] Figure 5 This is a schematic structural diagram of the appearance of the telescopic component combined with the inner tube in the first embodiment of the utility model;

[0024] Figure 6This is a schematic structural diagram of a load-bearing component of the first embodiment of the utility model;

[0025] Figure 7 This is a schematic structural diagram of the appearance of the telescopic component combined with the inner tube in the second embodiment of the utility model;

[0026] Figure 8 This is a schematic structural diagram of the appearance of the telescopic component combined with the inner tube in the third embodiment of the utility model;

[0027] Fig. 9 This is a schematic structural diagram of a load-bearing component of a fourth embodiment of the utility model;

[0028] Fig.10 This is a schematic structural diagram of a load-bearing component of a fifth embodiment of the utility model;

[0029] Fig.11 It is a schematic structural diagram of a load-bearing component of a sixth embodiment of the utility model. DETAILED DESCRIPTION

[0030] like Figure 1 , 2 , 3, 4, 5, and 6 show the first embodiment of the utility model.

[0031] The height-adjustable jack includes a telescopic component 1, a load-bearing component 7, and a supporting component. The telescopic component 1 is provided with a hand crank, an inner tube 3, an outer tube 2, a limit plate 4, and a screw mechanism. The inner tube 3 is located inside the outer tube 2, and the inner tube 3 is connected to the outer tube 2 through the screw mechanism. The hand crank is connected to the screw of the screw mechanism. Turning the hand crank can drive the inner tube 3 to perform translational motion along the center line of the outer tube 2. The supporting component is used to touch the bottom, which can be a universal wheel or a support plate structure. In this embodiment, a support plate is used as an example. The supporting component is fixedly installed at the end of the inner tube 3. The load-bearing component 7 is movably installed on the outer tube 2. Overall, the operating height of the height-adjustable jack can be adjusted by turning the hand crank. If the inner tube 3 extends outward relative to the outer tube 2, the operating height increases, and if the inner tube 3 contracts inward relative to the outer tube 2, the operating height decreases.

[0032] The outer tube 2 is a hexagonal tube structure, and the outer contour shape and inner contour shape of the cross section of the outer tube 2 are both regular hexagons; the outer surface of the outer tube 2 is provided with six side surfaces; the outer contour shape and inner contour shape of the cross section of the inner tube 3 are also regular hexagons. The limiting plate 4 is a long strip structure, and the limiting plate 4 is fixedly installed on the outside of the outer tube 2 by welding and is only connected to one of the side surfaces. The extension direction of the limiting plate 4 on the outer tube 2 is parallel to the center line of the outer tube 2. The limiting plate 4 is provided with limiting holes 6 distributed at equal intervals, and the arrangement direction of the limiting holes 6 is parallel to the center line of the outer tube 2. The limiting holes 6 are located in the limiting plate 4, and the space of the limiting holes 6 is only distributed in the limiting plate 4, so that the limiting holes 6 can be avoided from being distributed on the outer tube 2, otherwise it will cause material reduction damage to the outer tube 2, thereby affecting the structural strength of the outer tube 2. The edge of the limiting plate 4 is provided with an arc-shaped notch 5, and the notch 5 and the limiting hole 6 are staggered in a direction parallel to the center line of the outer tube 2.

[0033] The load-bearing component 7 is provided with a pipe sleeve 8, a load-bearing seat 12, and a clamping member. A through-type receiving hole 13 is provided inside the pipe sleeve 8. The receiving hole 13 is divided into two parts, one part is a hole Ⅰ14 for receiving the outer tube 2, and the other part is a hole Ⅱ15 for receiving the limit plate 4. The cross-sectional profile of the hole Ⅰ14 is a regular hexagon, and the cross-sectional profile of the hole Ⅱ15 is a rectangle. The hole Ⅰ14 is directly connected with the hole Ⅱ15. During installation, the pipe sleeve 8 is sleeved on the outside of the outer tube 2, the outer tube 2 passes through the hole Ⅰ14, and the limit plate 4 passes through the hole Ⅱ15. The center line of the hole Ⅰ14 coincides with the center line of the outer tube 2. Since the cross-sectional profile of the receiving hole 13 is the same as the cross-sectional profile of the outer tube 2 where the limit plate 4 is installed.

[0034] The pipe sleeve 8 is provided with a guide column 10 and a retaining ring 11. The guide column 10 is perpendicular to the center line of the hole Ⅰ 14. The pipe sleeve 8 is provided with a mounting hole 9, which is located inside the guide column 10, one end of which is directly connected to the hole Ⅱ 15, and the other end of the mounting hole 9 is connected to the external space of the pipe sleeve 8; the center line of the mounting hole 9 coincides with the center line of the guide column 10; the cross section of the mounting hole 9 is convex, and the pipe sleeve 8 forms a step surface at the mounting hole 9. The retaining ring 11 surrounds the guide column 10, the guide column 10 is located in the middle of the retaining ring 11, the center line of the retaining ring 11 coincides with the center line of the guide column 10, and the length of the retaining ring 11 is less than the length of the guide column 10.

[0035] The clamping member includes a limit column 16, a spring 17, and a handle 18. The cross section of the limit column 16 is convex, and it includes two cylindrical parts with different radii, and a step surface is formed between the two cylindrical parts. The spring 17 is sleeved on the limit column 16, and the limit column 16 is installed in the mounting hole 9 in a sliding manner, that is, the limit column 16 can slide in the mounting hole 9, one end of the spring 17 is supported by the step surface on the limit column 16, and the other end of the spring 17 is supported by the step surface in the pipe sleeve 8, so that the spring 17 is located between the limit column 16 and the pipe sleeve 8, and the spring 17 is always in a compressed state. One end of the limit column 16 passes through the mounting hole 9 and is located outside the pipe sleeve 8, and the other end of the limit column 16 extends into the hole II 15. The end of the limit column 16 located outside the pipe sleeve 8 is fixedly connected to the handle 18. A guide sleeve 19 is provided on the handle 18. The guide sleeve 19 is distributed around the limit column 16, and the center line of the guide sleeve 19 coincides with the center line of the limit column 16. After installation, one end of the guide column 10 is embedded in the guide sleeve 19, and the guide sleeve 19 is slidably connected to the guide column 10; the guide sleeve 19 is also located inside the retaining ring 11.

[0036] The load-carrying seat 12 is fixedly mounted on the pipe sleeve 8, and a wavy loading surface 20 corresponding to the loading operation is provided on the top of the load-carrying seat 12. When in use, the loading surface 20 directly supports the trailer caravan. The load-carrying seat 12 is located on one side of the outer tube 2, and the handle 18 is located on the other side of the outer tube 2. During installation, the limiting column 16 is embedded in the limiting hole 6, so that the outer tube 2 and the limiting plate 4 are embedded in the receiving hole 13 and the limiting column 16 is embedded in the limiting hole 6. After installation, the center line of the guide column 10 is perpendicular to the center line of the outer tube 2, and the center line of the limiting column 16 is also perpendicular to the center line of the outer tube 2. In this way, the pipe sleeve 8 cannot rotate relative to the outer tube 2 in the circumferential direction around the center line of the outer tube 2, and cannot translate relative to the outer tube 2 in the direction parallel to the center line of the outer tube 2. Thus, the load-carrying component 7 is assembled with the telescopic component 1. When it is necessary to change the relative position of the load-bearing component 7 on the telescopic component 1, it is only necessary to pull the handle 18 to disengage the limiting column 16 from the limiting hole 6, and then adjust the load-bearing component 7 to another position to ensure that the limiting column 16 is embedded in another limiting hole 6. The positioning effect obtained by the load-bearing component 7 on the limiting plate 4 can greatly change the working height of the load-bearing component 7, that is, the working height of the jack. This adjustment process is a coarse adjustment method; and the working height is slightly changed by turning the hand crank, and this adjustment process is a fine adjustment method. When the height of the quick-adjustable jack is adjusted greatly, the load-bearing component 7 can be located near the predetermined working height through a coarse adjustment method, and then the length of the telescopic component 1 can be changed through a fine adjustment method until the jack is at the predetermined working height.

[0037] like Figure 7As shown, the second embodiment of the utility model is different from the first embodiment in that the inner contour of the cross section of the outer tube 2 is circular, and the outer contour and the inner contour of the cross section of the inner tube 3 are both circular.

[0038] like Figure 8 As shown, the third embodiment of the utility model is different from the first embodiment in that the outer contour shape and the inner contour shape of the cross section of the inner tube 3 are both circular.

[0039] like Fig. 9 As shown, the fourth embodiment of the utility model is different from the first embodiment in that a turntable 21 is provided on the load-carrying seat 12, and the rotation direction of the turntable 21 is located in the vertical plane. When in use, the turntable 21 is fixedly connected to the trailer caravan by bolts.

[0040] like Fig.10 As shown, the fifth embodiment of the utility model is different from the first embodiment in that a mounting hole 22 is provided on the load seat 12, and the center line of the mounting hole 22 is perpendicular to the center line of the outer tube 2. When in use, the mounting hole 22 is docked with the raised part on the trailer caravan, that is, the raised part is embedded in the mounting hole 22.

[0041] like Fig.11 As shown, the sixth embodiment of the utility model is different from the first embodiment in that the load-carrying seat 12 has a triangular outline, and the center line of the load-carrying seat 12 coincides with the center line of the hole 14. When in use, the load-carrying seat 12 is fixedly connected to the trailer caravan by bolts.

Claims

1. A height-adjustable jack, comprising a telescopic component (1) and a load-bearing component (7), wherein the telescopic component (1) is provided with an outer tube (2) and an inner tube (3), wherein the inner tube (3) is located inside the outer tube (2) and the inner tube (3) is movably connected to the outer tube (2) along the center line of the outer tube (2), and characterized in that: The outer tube (2) is a hexagonal tube structure. The outer surface of the outer tube (2) is provided with six side surfaces. The telescopic component (1) is also provided with a limit plate (4). The limit plate (4) is fixedly mounted on the outside of the outer tube (2) and is connected to only one of the side surfaces. The extension direction of the limit plate (4) on the outer tube (2) is parallel to the center line of the outer tube (2). The limit plate (4) is provided with limit holes (6). The arrangement direction of the limit holes (6) is parallel to the center line of the outer tube (2). The load-bearing component (7) is movably mounted on the outer tube (2). The load-bearing component (7) is provided with a pipe sleeve (8), a load-bearing seat (12), and a clamping member. A through-type receiving hole (13) is provided inside the pipe sleeve (8). The receiving hole (13) includes a hole I (14) for receiving the outer tube (2) and a hole II (15) for receiving the stop plate (4). The hole I (14) is connected to the hole II (15). The center line of the hole I (14) coincides with the center line of the outer tube (2). The outer contour shape of the cross section of the outer tube (2) and the contour shape of the cross section of the hole I (14) are both regular hexagons. The cross section of the stop plate (4) is The outer contour shape of the cross section and the contour shape of the cross section of the hole II (15) are both rectangular; the contour shape of the cross section of the accommodating hole (13) is the same as the contour shape of the cross section of the outer tube (2) at the location where the limiting plate (4) is installed; the clamping member comprises a limiting column (16), a spring (17), and a handle (18); the cross section of the limiting column (16) is convex; the spring (17) is sleeved on the limiting column (16); the pipe sleeve (8) is provided with a mounting hole (9); the cross section of the mounting hole (9) is convex; the limiting column (16) is provided with a mounting hole (9); the limiting column (16) is provided with a mounting hole (9); the mounting hole (9) is provided with a mounting hole (9); the limiting column (16) is provided with a mounting hole (18 ... The spring (17) is located between the limit column (16) and the sleeve (8), one end of the limit column (16) is located outside the sleeve (8) and is fixedly connected to the handle (18), the other end of the limit column (16) extends into the hole II (15), the load-bearing seat (12) is fixedly mounted on the sleeve (8), the sleeve (8) is embedded in the receiving hole (13) through the outer tube (2) and the limit plate (4), and the limit column (16) is embedded in the limit hole (6) and movably mounted on the telescopic component (1).

2. The height-adjustable jack according to claim 1, characterized in that: The inner contour shape of the cross section of the outer tube (2) is a regular hexagon, and the outer contour shape and the inner contour shape of the cross section of the inner tube (3) are both regular hexagons.

3. The height-adjustable jack according to claim 1, characterized in that: The inner contour shape of the cross section of the outer tube (2) is circular, and the outer contour shape and the inner contour shape of the cross section of the inner tube (3) are both circular.

4. The height-adjustable jack according to claim 1, characterized in that: An arc-shaped notch (5) is provided on the edge of the limiting plate (4), and the notch (5) and the limiting hole (6) are arranged in a staggered manner in a direction parallel to the center line of the outer tube (2).

5. The height-adjustable jack according to claim 1, characterized in that: The pipe sleeve (8) is provided with a guide column (10), the mounting hole (9) is located in the guide column (10), the center line of the mounting hole (9) coincides with the center line of the guide column (10), the handle (18) is provided with a guide sleeve (19), the guide column (10) extends into the guide sleeve (19), and the guide sleeve (19) is slidably connected to the guide column (10).

6. The height-adjustable jack according to claim 5, characterized in that: The pipe sleeve (8) is provided with a retaining ring (11), and the guide sleeve (19) is located inside the retaining ring (11).

7. The height-adjustable jack according to claim 1, characterized in that: The top of the load-carrying seat (12) is provided with a wavy loading surface (20) corresponding to the load-carrying operation.

8. The height-adjustable jack according to claim 1, characterized in that: A turntable (21) is provided on the load-carrying seat (12), and the rotation direction of the turntable (21) is located in a vertical plane.

9. The height-adjustable jack according to claim 1, characterized in that: The load-carrying seat (12) is provided with an assembly hole (22), and the center line of the assembly hole (22) is perpendicular to the center line of the outer tube (2).

10. The height-adjustable jack according to claim 1, characterized in that: The outline of the load-carrying seat (12) is triangular, and the center line of the load-carrying seat (12) coincides with the center line of the hole I (14).

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