A parallel propulsion and rotation mechanism for the outriggers of a box body

Abstract

This utility model discloses a parallel propulsion and rotation mechanism for a vehicle body support leg, including a vehicle body longitudinal beam. A firing rod is slidably connected to the longitudinal beam from left to right. A push-pull assembly for driving the firing rod to slide left and right is provided at the left end of the firing rod. A connecting assembly is provided between the push-pull assembly and the firing rod bracket. A limiting assembly for limiting the firing rod is provided on the left side of the longitudinal beam, and a guide assembly for guiding the sliding of the firing rod is provided on the right side of the longitudinal beam. This utility model achieves linear displacement guidance and rotational guidance of the firing rod through a guide groove, a limiting ball base, and a limiting post. At the same time, the threaded part of the guide groove enables the rear end of the firing rod to be threadedly connected to the firing rod sleeve, further improving the connection strength between the firing rod and the firing rod sleeve and ensuring the reliability of the firing rod during use. The internal and external threads and the limiting groove can also limit the rotation angle of the firing rod to prevent excessive rotation.

Description

Technical Field

[0001] This utility model belongs to the field of transportation equipment technology and relates to a parallel propulsion and rotation mechanism for the body support legs. Background Technology

[0002] When unloading cargo from a van, the entire cargo box is separated from the frame. During separation, telescopic legs on both sides of the cargo box are activated to lift it, thus separating the cargo box from the frame. Existing cargo box and frame separation structures include, for example, the utility model patent application we previously filed, application number 2023224702320, entitled "A Cargo Vehicle Landing Loading and Unloading Structure." This technical solution includes horizontal and vertical support legs. When not in use, the vertical support legs are retracted into the cargo box recess. When in use, they are extended by the horizontal support legs, which then elongate to lift the cargo box, thereby achieving separation of the cargo box from the frame.

[0003] Chinese utility model patent CN220865392U discloses a landing support leg for a van, including a leg fixed to the bottom of the van, a telescopic component mounted on the leg, and a rotating structure that allows the telescopic component to rotate relative to the leg. The rotating structure includes a guide structure and an anti-rotation structure that positions the telescopic component after rotation. The guide structure includes a guide groove on a section of the leg near its end, with a limit post on the telescopic component corresponding to the guide groove. The anti-rotation structure includes a first positioning member fixed inside the leg and a second positioning member on the telescopic component. The first and second positioning members can be nested together. This technical solution, by creating a guide groove in the leg, allows the telescopic leg to extend to both sides of the van while rotating, enabling it to tilt or retract horizontally without occupying van space or affecting driving or maintenance. However, this technical solution cannot precisely limit the position of the leg after telescopic rotation, and due to its single-stroke propulsion and limiting structure, it generates significant noise during telescopic movement and exhibits considerable displacement deviation during use.

[0004] Therefore, optimizing and improving the existing outrigger parallel propulsion and rotation mechanism is a problem worth studying. Utility Model Content

[0005] To address the shortcomings in the existing technology, this utility model proposes a dual-structure parallel propulsion and rotation mechanism for the body support legs, which uses threaded rotation for propulsion and limiting, and a rotary guide groove for guidance and limiting.

[0006] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0007] A parallel propulsion and rotation mechanism for a vehicle body support leg includes a vehicle body longitudinal beam. A bolt is slidably connected to the longitudinal beam from left to right. A push-pull assembly for driving the bolt to slide left and right is provided at the left end of the bolt. A connecting assembly for rotatable connection is provided between the push-pull assembly and the bolt bracket. A limiting assembly for limiting the bolt is provided on the left side of the longitudinal beam, and a guide assembly for guiding the bolt to slide is provided on the right side of the longitudinal beam.

[0008] Furthermore, the push-pull assembly includes a hydraulic cylinder disposed on the left side of the bolt, and a hydraulic rod that can extend and slide within the hydraulic cylinder is disposed therein. The left end of the hydraulic rod extends out of the hydraulic cylinder and is rotatably connected to the right end of the bolt through a connecting assembly.

[0009] Furthermore, the connecting assembly includes a short shell and a long shell, the opposite sides of the short shell and the long shell are fixedly connected by bolts, the long shell is fixedly connected to the end of the rifle rod, and a spindle rod is rotatably connected inside the short shell and the long shell by a rolling bearing, the left end of the spindle rod extends out of the left side of the short shell and is fixedly connected to the right end of the hydraulic rod.

[0010] Furthermore, the guide assembly includes a limiting ball base disposed on the right side of the vehicle body longitudinal beam, the bolt is inserted into the limiting ball base, two guide grooves are symmetrically opened on the circumferential side of the bolt, and two limiting balls are embedded in the limiting ball base, which are respectively rolled and connected in the two guide grooves.

[0011] Furthermore, the left end of the two guide grooves is a straight groove, and the right end is an alternating threaded groove, so that the rifle rod can rotate and slide under the action of the threaded groove and the push-pull assembly.

[0012] Furthermore, the limiting component includes a bolt sleeve disposed on the left side of the longitudinal beam of the vehicle body. The inner side of the bolt sleeve is provided with an internal thread, and the circumferential side of the left end of the bolt is provided with an external thread that mates with the internal thread on the inner side of the bolt sleeve. The bolt can be threadedly connected to the bolt sleeve under the action of the guide groove and the push-pull component.

[0013] Furthermore, the hydraulic rod, the spindle tie rod, the rifle rod, and the long shell are all fixedly connected by pin holes and pin posts.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] This utility model achieves linear displacement and rotational guidance of the rifle rod through the guide groove, the limiting ball base, and the limiting post; at the same time, under the action of the threaded part of the guide groove, the rear end of the rifle rod can be threadedly connected to the rifle rod sleeve, which further improves the connection strength between the rifle rod and the rifle rod sleeve and ensures the reliability of the rifle rod during use.

[0016] The internal and external threads and the limiting groove in this utility model can also limit the rotation angle of the rifle rod, preventing the rifle rod from rotating excessively, which would cause the leg pants to not be placed vertically and affect the stability of the support.

[0017] The connecting component in this invention ensures that the hydraulic rod does not rotate with the crank arm, thus guaranteeing the reliability and stability of the hydraulic rod when it pushes the crank arm to move. Attached Figure Description

[0018] Figure 1 This is a schematic cross-sectional view of the present invention.

[0019] Figure 2 This is a three-dimensional structural diagram of the present invention;

[0020] Figure 3 For reference regarding the usage state of this utility model Figure 1 ;

[0021] Figure 4 For reference regarding the usage state of this utility model Figure 2 ;

[0022] Figure 5 This is a schematic diagram of the structure of the bolt in this utility model;

[0023] In the diagram: 1. Hydraulic cylinder; 2. Hydraulic rod; 3. Spindle tie rod; 4. Rolled bearing; 5. Short shell; 6. Long shell; 7. Rifling rod; 8. Rifling rod sleeve; 9. Car body longitudinal beam; 10. Limit ball base; 11. Limit ball. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model. Example 1

[0025] like Figure 1 As shown, in this embodiment, a parallel propulsion and rotation mechanism for a vehicle body support leg includes a vehicle body longitudinal beam 9. A bolt 7 is slidably connected to the vehicle body longitudinal beam 9. A push-pull assembly for driving the bolt 7 to slide left and right is provided at the left end of the bolt 7. A connecting assembly for rotatable connection is provided between the push-pull assembly and the bolt 7 bracket. A limiting assembly for limiting the bolt 7 is provided on the left side of the vehicle body longitudinal beam 9. A guide assembly for guiding the bolt 7 to slide is provided on the right side of the vehicle body longitudinal beam 9.

[0026] In this embodiment, the push-pull assembly includes a hydraulic cylinder 1 disposed on the left side of the bolt 7. The hydraulic cylinder 1 is provided with a hydraulic rod 2 that can slide and extend within the hydraulic cylinder 1. The left end of the hydraulic rod 2 extends out of the hydraulic cylinder 1 and is rotatably connected to the right end of the bolt 7 through a connecting assembly.

[0027] In this embodiment, the connecting assembly includes a short shell 5 and a long shell 6. The opposite sides of the short shell 5 and the long shell 6 are fixedly connected by bolts. The long shell 6 is fixedly connected to the end of the rocker arm 7. A spindle rod 3 is rotatably connected inside the short shell 5 and the long shell 6 through a rolling bearing 4. The left end of the spindle rod 3 extends out of the left side of the short shell 5 and is fixedly connected to the right end of the hydraulic rod 2.

[0028] In this embodiment, the guide assembly includes a limiting ball base 10 that is bolted to the right side of the longitudinal beam 9 of the vehicle body. The bolt rod 7 is inserted into the limiting ball base 10. Two guide grooves are symmetrically opened on the circumferential side of the bolt rod 7. Two limiting balls 11 that are respectively rolled and connected in the two guide grooves are embedded in the limiting ball base 10.

[0029] In this embodiment, the left end of the two guide grooves is a straight groove, and the right end is an alternating threaded groove. The rake rod 7 can rotate and slide under the action of the threaded groove and the push-pull assembly.

[0030] In this embodiment, the limiting component includes a bolt sleeve 8 disposed on the left side of the longitudinal beam 9 of the vehicle body. The inner side of the bolt sleeve 8 is provided with an internal thread, and the circumferential side of the left end of the bolt 7 is provided with an external thread that matches the internal thread on the inner side of the bolt sleeve 8. The bolt 7 can be threadedly connected to the bolt sleeve 8 under the action of the guide groove and the push-pull component.

[0031] In this embodiment, the hydraulic rod 2, the spindle pull rod 3, the bolt rod 7, and the long shell 6 are all fixedly connected by pin holes and pin posts. The connection method of pin holes and pin posts improves the convenience for workers when installing, disassembling, and replacing the hydraulic rod 2, the spindle pull rod 3, and the bolt rod 7.

[0032] The working principle of the above embodiments is as follows:

[0033] During installation, the workers first install the rifle sleeve 8 and the limit ball base 10 onto the left and right sides of the longitudinal beam 9 of the vehicle body. Then, the rifle 7 passes through the rifle sleeve 8 and the limit ball base 10 from left to right. As the rifle 7 passes through the limit ball base 10, the two limit balls 11 on the limit ball base 10 are positioned in the two guide grooves respectively. Then, the long shell 6 is fixed to the end of the rifle 7 through the pin hole and the pin post. The spindle tie rod 3 is connected to the rolling bearing 4 in the short shell 5. After the connection is completed, the long shell 6 and the short shell 5 are connected and fixed together with bolts. Finally, the spindle tie rod 3 is connected and fixed to the hydraulic rod 2 through the pin hole and the pin post to complete the overall assembly.

[0034] In use, the hydraulic rod 2 can push the bolt 7 to move from left to right. During movement, the guide groove and the limiting ball 11 guide the bolt 7. When the limiting ball 11 rolls in the straight section at the front end of the guide groove, the bolt 7 cannot rotate and can only slide horizontally to the right. When the limiting ball 11 is at the spiral section at the rear end of the guide groove, the bolt 7 begins to rotate under the action of the spiral limiting groove, causing the leg trousers to rotate as well. This achieves the device's support and lifting of the compartment. Under the action of the connecting components, the hydraulic rod 2 does not move with the bolt 7. The rotation ensures the reliability and stability of the hydraulic rod 2 when pushing the bolt 7. When the bolt 7 rotates, the external thread on the circumferential side of the bolt 7 can be helically inserted into the internal thread of the bolt sleeve 8, so that the bolt 7 is threadedly connected to the bolt sleeve 8, preventing the bolt 7 from moving left and right during support, further ensuring the stability and reliability of the bolt 7 during use. The thread and the limiting groove can also limit the rotation angle of the bolt 7, preventing the bolt 7 from rotating excessively, which would cause the leg pants to not be placed vertically and affect the stability of the support.

[0035] Example 2 differs from Example 1 in that:

[0036] The bolt sleeve 8 has an oil inlet that communicates with the internal thread. The oil inlet is equipped with a one-way valve. During use, the operator can inject lubricating oil into the bolt sleeve through the oil inlet, ensuring the smoothness of the bolt 7 when it moves and rotates, and reducing friction.

[0037] The connecting component in the above embodiment can be replaced with a rotating coupling to ensure the rotating connection between the hydraulic rod 2 and the bolt 7.

[0038] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A parallel propulsion and rotation mechanism for a vehicle body support leg, comprising a vehicle body longitudinal beam (9), characterized in that: A bolt (7) is slidably connected to the longitudinal beam (9) of the vehicle body. A push-pull assembly for driving the bolt (7) to slide left and right is provided at the left end of the bolt (7). A connecting assembly for rotational connection is provided between the push-pull assembly and the bolt (7) bracket. A limiting assembly for limiting the bolt (7) is provided on the left side of the longitudinal beam (9). A guide assembly for sliding guide of the bolt (7) is provided on the right side of the longitudinal beam (9).

2. The parallel propulsion and rotation mechanism for the body support legs according to claim 1, characterized in that: The push-pull assembly includes a hydraulic cylinder (1) located on the left side of the bolt (7). The hydraulic cylinder (1) contains a hydraulic rod (2) that can slide and extend within the hydraulic cylinder (1). The left end of the hydraulic rod (2) extends out of the hydraulic cylinder (1) and is rotatably connected to the right end of the bolt (7) via a connecting assembly.

3. The parallel propulsion and rotation mechanism for the body support legs according to claim 2, characterized in that: The connecting assembly includes a short shell (5) and a long shell (6). The opposite sides of the short shell (5) and the long shell (6) are fixedly connected by bolts. The long shell (6) is fixedly connected to the end of the rock bolt (7). The short shell (5) and the long shell (6) are rotatably connected to a spindle rod (3) through a rolling bearing (4). The left end of the spindle rod (3) extends out of the left side of the short shell (5) and is fixedly connected to the right end of the hydraulic rod (2).

4. The parallel propulsion and rotation mechanism for the body support legs according to claim 1, characterized in that: The guide assembly includes a limiting ball base (10) disposed on the right side of the longitudinal beam (9) of the vehicle body, a rocker arm (7) inserted into the limiting ball base (10), two guide grooves symmetrically opened on the circumferential side of the rocker arm (7), and two limiting balls (11) respectively rolled and connected in the two guide grooves in the limiting ball base (10).

5. The parallel propulsion and rotation mechanism for the body support legs according to claim 4, characterized in that: The left end of the two guide grooves is a straight groove, and the right end is an interlaced threaded groove. The rake rod (7) can rotate and slide under the action of the threaded groove and the push-pull assembly.

6. The parallel propulsion and rotation mechanism for the body support legs according to claim 5, characterized in that: The limiting component includes a rifle sleeve (8) disposed on the left side of the longitudinal beam (9) of the vehicle body. The inner side of the rifle sleeve (8) is provided with an internal thread. The circumferential side of the left end of the rifle (7) is provided with an external thread that matches the internal thread of the inner side of the rifle sleeve (8). The rifle (7) can be threadedly connected to the rifle sleeve (8) under the action of the guide groove and the push-pull component.

7. The parallel propulsion and rotation mechanism for the body support legs according to claim 3, characterized in that: The hydraulic rod (2), the spindle tie rod (3), the rake rod (7), and the long shell (6) are all fixedly connected by pin holes and pins.

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