Semitrailer base supporting device

Abstract

The utility model discloses a semitrailer base supporting device which comprises a containing plate, two expansion groove openings are formed in the top of the containing plate, extension plates are connected into the expansion groove openings in a sliding mode, two moving groove openings are formed in the bottom of the containing plate, a protection box is fixedly connected to the bottom of the containing plate, and a moving assembly assisting the extension plates in moving is arranged in the protection box. A limiting box penetrates through the inner bottom wall of the protection box and slides at the inner bottom of the protection box, supporting legs are fixedly connected to the bottom of the limiting box, a center rod is fixedly arranged at the bottom of the placing plate, and the bottom of the center rod penetrates through the limiting box and extends into the limiting box. By arranging the moving assembly, under the action of external force, the protection box moves downwards on the periphery of the limiting box, then the moving assembly and the bottom part are matched to drive the two extension plates to move outwards in the expansion groove opening, the stress area of the semitrailer base and the containing plate is increased, the impact of gravity on the device is reduced, and the situation that the device topples over or is bent due to the external force is avoided; and the use safety is improved.

Description

Technical Field

[0001] The utility model relates to a semitrailer base support device and belongs to the technical field of semitrailer base support. Background Art

[0002] A semi-trailer is a trailer with the axle placed behind the center of gravity of the vehicle (when the vehicle is evenly loaded) and equipped with a coupling device that can transmit horizontal and vertical forces to the tractor. Semi-trailers are generally three-axle semi-trailers, which are divided into many types such as 11-meter warehouse semi-trailers, 13-meter warehouse semi-trailers, low-bed semi-trailers, etc. It is a heavy-duty transportation vehicle connected to the semi-trailer head through a traction pin.

[0003] In the prior art, for example, the Chinese patent number CN 208248174 U discloses a "semi-trailer support device", which includes a support body, a support leg at the bottom of the support body, a support arm rotatably connected to the outer wall of the middle part of the support body, one end of the support arm being vertically connected to a support rod, and a square tubular sliding sleeve, one end of the square tubular sliding sleeve being fixedly connected to a limiting device, the limiting device including a long strip limiting plate with one end extending into the square tubular sliding sleeve and fixedly connected to the inner wall of the square tubular sliding sleeve, and a limiting bolt being provided at the other end of the limiting plate; a gear shaft is axially connected to the other end of the square tubular sliding sleeve, the gear shaft is mounted on the upper part of the support body and vertically connects the square tubular sliding sleeve to the upper part of the support body, a gear is fixedly connected to the gear shaft, the gear is connected to the worm gear, both ends of the worm are mounted on the support body and one end of the worm is provided with a square shaft head; a square tubular connecting sleeve is sleeved on the outer side of the square tubular sliding sleeve, and a connecting arm is connected to the square tubular connecting sleeve. The beneficial effect is that the utility model improves the existing technology. The improved support device is not only solid and durable, but also the additional transmission mechanism composed of the gear shaft, gear, worm and square hole shaft head makes the angle of the support body controllable during rotation and has a good self-locking effect.

[0004] However, in the prior art, when the semi-trailer stops driving, the bottom of the semi-trailer needs to be supported and fixed by a supporting device to improve the stability of the vehicle. When the semi-trailer is loaded, the load-bearing effect of the supporting legs of some supporting devices is not ideal under the action of external forces, and bending or tipping may occur, resulting in unstable load-bearing. Therefore, a semi-trailer base supporting device is designed. Utility Model Content

[0005] The purpose of the utility model is to design a semi-trailer base support device in view of the above-mentioned problems existing in the prior art, to overcome the instability of the supporting effect of the semi-trailer base in the prior art.

[0006] In order to achieve the above purpose, the technical solution of the utility model is:

[0007] A semi-trailer base support device includes a placement plate, two expansion slots are provided on the top of the placement plate, an extension plate is slidably connected in the expansion slots, two movable slots are provided on the bottom of the placement plate, a protection box is fixedly connected to the bottom of the placement plate, a movable component for assisting the movement of the extension plate is arranged in the protection box, a limit box is penetrated by the bottom wall of the protection box, and the limit box slides at the bottom of the protection box, a support leg is fixedly connected to the bottom of the limit box, a center rod is fixedly provided at the bottom of the placement plate, and the bottom of the center rod penetrates the limit box and extends to the inside.

[0008] Preferably, the moving assembly includes a push plate and two push blocks, the push plate is slidably sleeved on the outer ring of the center rod, the push blocks are slidably set in the moving slots, and the tops are fixedly connected to the extension plates.

[0009] Preferably, two hinged seats 1 are fixedly provided on the top of the push plate, a support arm is hinged on the top of the hinged seat 1, and a hinged seat 2 is fixedly connected to the bottom of the push block, and one end of the support arm away from the hinged seat 1 is hinged to the hinged seat 2.

[0010] Preferably, a movable plate is fixedly provided at the bottom of the center rod, and the movable plate slides on the inner wall of the limit box.

[0011] Preferably, a pressure spring is fixedly arranged between the push plate and the top outer wall of the limit box, and the inner ring of the pressure spring is sleeved on the outer ring of the center rod.

[0012] Preferably, a telescopic spring is fixedly arranged between the movable plate and the inner bottom wall of the limit box.

[0013] Preferably, a plurality of claws are fixedly provided on the outer periphery of the bottom of the supporting leg, and the top of the extension plate is 1 cm lower than the top of the placement plate.

[0014] Beneficial effects achieved by the utility model:

[0015] By setting a moving component, when there is external force, the protection box moves downward on the outer periphery of the limit box, and the center rod slides with the moving plate in the limit box under the action of the force, so that the push plate is driven to move upward by the reverse thrust of the limit box and the pressure spring, and the push plate drives the two support arms to expand to both sides with the center rod as the center through two hinge seats 1, and the two support arms drive the two push blocks to slide outward in the moving groove through hinge seat 2, and the sliding of the push blocks drives the two extension plates to slide outward in the expansion grooves at the same time, and the force area on the top of the placement plate can be expanded by external force, so as to avoid the device from tipping over or bending due to external force, improve the safety of use, and greatly increase the supporting effect of the supporting device. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of the three-dimensional structure of an embodiment of the utility model;

[0017] Figure 2 for Figure 1 The schematic diagram of the cutaway structure of the protection box and the limit box is shown;

[0018] Figure 3 for Figure 1 Schematic diagram of the internal three-dimensional structure of the protective box.

[0019] Figure numerals: 1. Placement plate; 01. Extension plate; 02. Moving slot; 2. Protection box; 3. Moving assembly; 31. Push plate; 32. Push block; 33. Articulated seat one; 34. Support arm; 35. Articulated seat two; 4. Limit box; 5. Support leg; 6. Center rod; 7. Moving plate; 8. Pressure spring; 9. Telescopic spring; 10. Claw teeth. DETAILED DESCRIPTION

[0020] The utility model is further described below in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the utility model, and cannot be used to limit the protection scope of the utility model. Example 1

[0021] like Figure 1-3 As shown, the utility model proposes a semi-trailer base support device, including a placing plate 1, the placing plate 1 is provided with two extension slots on the top, an extension plate 01 is slidably connected in the extension slot, two moving slots 02 are provided at the bottom of the placing plate 1, a protection box 2 is fixedly connected to the bottom of the placing plate 1, a moving component 3 for assisting the movement of the extension plate 01 is arranged in the protection box 2, a limit box 4 is penetrated through the inner bottom wall of the protection box 2, and the limit box 4 slides at the bottom of the protection box 2, a support leg 5 is fixedly connected to the bottom of the limit box 4, a center rod 6 is fixedly arranged at the bottom of the placing plate 1, and the bottom of the center rod 6 penetrates through the limit box 4.

[0022] In this embodiment, two expansion slots are provided on the top of the placement plate 1, and an extension plate 01 is slidably connected in the expansion slot. When the top of the placement plate 1 is subjected to a large external force, the protection box 2 will be driven to move downward on the periphery of the limit box 4, and then the two extension plates 01 will be driven to move in and out of the expansion slots through the cooperation of the moving component 3 and the bottom parts, thereby increasing the force-bearing area of ​​the base and the placement plate 1, reducing the impact of gravity on the device, avoiding the device from tipping over or bending due to external force, improving the safety of use, and increasing the service life of the device. Example 2

[0023] like Figure 1-3As shown, a semi-trailer base support device proposed by the utility model, compared with embodiment 1, this embodiment also includes a moving component 3 including a push plate 31 and two push blocks 32, the push plate 31 is slidably sleeved on the outer ring of the center rod 6, the push block 32 is slidably set in the moving slot 02, and the top is fixedly connected to the extension plate 01, the top of the push plate 31 is fixedly provided with two hinged seats 1 33, the top of the hinged seat 1 33 is hinged with a support arm 34, the bottom of the push block 32 is fixedly connected with a hinged seat 2 35, and the support One end of the arm 34 away from the hinge seat 1 33 is hinged to the hinge seat 2 35, a movable plate 7 is fixedly arranged at the bottom of the center rod 6, and the movable plate 7 slides on the inner wall of the limit box 4, a pressure spring 8 is fixedly arranged between the push plate 31 and the top outer wall of the limit box 4, the inner ring of the pressure spring 8 is sleeved on the outer ring of the center rod 6, a telescopic spring 9 is fixedly arranged between the movable plate 7 and the inner bottom wall of the limit box 4, a plurality of claws 10 are fixedly arranged on the outer periphery of the bottom of the support leg 5, and the top of the extension plate 01 is 1 cm lower than the top of the placement plate 1.

[0024] In this embodiment, the top of the extension plate 01 is set 1 cm lower than the top of the placement plate 1 in the expansion slot. When the force pushes the push plate 31 to move up on the outer circle of the center rod 6, the push plate 31 drives the two support arms 34 to expand to both sides with the center rod 6 as the center through the two hinge seats 1 33. The two support arms 34 drive the two push blocks 32 to slide outward in the moving slot 02 through the hinge seat 2 35. When the push blocks 32 slide, they drive the two extension plates 01 to slide outward in the expansion slot. The force area of ​​the top of the placement plate 1 can be expanded by external force to avoid the top being too heavy. By setting the elastic force of the telescopic spring 9 and the pressure spring 8, the impact of gravity on the device can be reduced, the damage to the device can be reduced, and the service life can be increased. A plurality of claw teeth 10 are set on the periphery of the support leg 5. The pressure on the device can increase the grip of the claw teeth 10 on the ground and improve the stability of the device.

[0025] Working principle: When using the semi-trailer base support device, the two extension plates 01 can be pulled outward by external force, or the entire device can be placed on the semi-trailer base for support. When more and more items are loaded in the vehicle body, the protective box 2 will move down on the periphery of the limit box 4 under the action of external force, and the movable plate 7 can slide on the inner wall of the limit box 4 through the elastic force of the telescopic spring 9, reducing the impact force brought by the external force, and the limit box 4 can drive the push plate 31 to move up in the opposite direction through the elastic force of the pressure spring 8, so that the push plate 31 drives the two hinge seats 33 to slide on the outer circle of the center rod 6. The two hinged seats 1 33 push the two support arms 34 to drive the upper hinged seat 2 35 and the push block 32 to slide outward in the movable slot 02 with the center rod 6 as the center. The push block 32 drives the two extension plates 01 to slide outward in the extension slot. The elastic force of the pressure spring 8 and the telescopic spring 9 is used to improve the stability of the device's support of the vehicle base, and the contact area between the placement plate 1 and the two extension plates 01 and the base is expanded to avoid bending or tipping of the device due to the vehicle carrying too much weight. The overall purpose of good supporting effect is achieved, and the supporting effect of the supporting device is greatly increased.

[0026] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principles of the present invention. These improvements and modifications should also be regarded as the protection scope of the present invention.

Claims

1. A semi-trailer base support device, comprising a placement plate (1), characterized in that: The placement plate (1) has two extension slots at the top, and an extension plate (01) is slidably connected in the extension slots. The placement plate (1) has two movable slots (02) at the bottom. The placement plate (1) is fixedly connected to a protection box (2) at the bottom. A movable component (3) for assisting the extension plate (01) to move is arranged in the protection box (2). A limit box (4) is arranged through the bottom wall of the protection box (2), and the limit box (4) slides at the bottom of the protection box (2). A support leg (5) is fixedly connected to the bottom of the limit box (4). A center rod (6) is fixedly arranged at the bottom of the placement plate (1), and the bottom of the center rod (6) passes through the limit box (4) and extends to the inside.

2. A semi-trailer base support device according to claim 1, characterized in that: The moving assembly (3) comprises a push plate (31) and two push blocks (32); the push plate (31) is slidably sleeved on the outer ring of the center rod (6); the push blocks (32) are slidably arranged in the moving slot (02) and the tops are fixedly connected to the extension plate (01).

3. A semi-trailer base support device according to claim 2, characterized in that: Two hinged seats (33) are fixedly arranged on the top of the push plate (31), a support arm (34) is hingedly connected above the hinged seat (33), a hinged seat (35) is fixedly connected to the bottom of the push block (32), and one end of the support arm (34) away from the hinged seat (33) is hingedly connected to the hinged seat (35).

4. A semi-trailer base support device according to claim 1, characterized in that: A movable plate (7) is fixedly arranged at the bottom of the central rod (6), and the movable plate (7) slides on the inner wall of the limit box (4).

5. A semi-trailer base support device according to claim 2, characterized in that: A pressure spring (8) is fixedly arranged between the push plate (31) and the top outer wall of the limit box (4), and the inner ring of the pressure spring (8) is sleeved on the outer ring of the center rod (6).

6. A semi-trailer base support device according to claim 4, characterized in that: A telescopic spring (9) is fixedly arranged between the movable plate (7) and the inner bottom wall of the limit box (4).

7. A semi-trailer base support device according to claim 1, characterized in that: A plurality of claws (10) are fixedly arranged on the outer periphery of the bottom of the support leg (5), and the top of the extension plate (01) is 1 cm lower than the top of the placement plate (1).

Images