Portable vehicle-mounted crane

Abstract

The utility model discloses a portable vehicle-mounted crane. The portable vehicle-mounted crane is characterized by comprising a main body bracket, a mounting pipe, a suspension arm, a self-locking winch and a jack, the upper end of the main body support is sleeved with the mounting pipe, the mounting pipe can rotate in the circumferential direction relative to the main body support, and a first positioning structure for limiting rotation of the mounting pipe is arranged between the main body support and the mounting pipe; one end of the suspension arm is rotationally connected to the upper end of the mounting pipe, and the other end of the suspension arm is far away from the mounting pipe and can rotate up and down; a base of the jack is rotationally connected to the mounting pipe, and a piston rod of the jack is rotationally connected to the suspension arm to drive the suspension arm to rotate up and down; the self-locking type winch is installed on the lifting arm, and a lifting rope in the self-locking type winch winds around the end, away from the installation pipe, of the lifting arm and then naturally droops so that goods can be lifted. According to the utility model, the convenience for workers to carry goods by using the crane can be obviously improved.

Description

Technical Field

[0001] The utility model relates to the field of vehicle-mounted motors, in particular to a portable vehicle-mounted crane. Background Art

[0002] A crane, also known as a hoist, is a device widely used in a series of heavy industrial products such as ships, equipment, machinery, and molds. At present, trucks play a major role in land freight transportation. During transportation, loading and unloading of goods must be carried out. Many small goods are generally manually carried on and off the vehicle, while large goods must be operated by a crane or a forklift.

[0003] In the prior art, most cranes have a relatively simple structure. In the lifting structure, they cannot simultaneously have the functions of horizontal rotation and height lifting, resulting in a relatively single lifting angle of the crane, which brings great inconvenience to the staff in lifting goods. For example, the patent document with the publication number CN219341524U discloses a portable vehicle-mounted crane. Although this crane can achieve the functions of horizontal rotation and boom height adjustment, in this technical solution, the adjustment of the boom is achieved by the engagement and positioning of the support plate 63 arranged in the groove two 61 and the triangular grooves 64 arrayed on the boom 3. When using this structure, the operator needs to manually lift or lower the end of the boom far from the fixed block 22 to achieve the height adjustment function. Since the end of the boom far from the fixed block 22 is hung with goods, it will be relatively heavy, resulting in difficulty in height adjustment during the lifting of the goods. Therefore, further improvement is needed. Summary of the Utility Model

[0004] Aiming at the deficiencies of the prior art, the utility model provides a vehicle-mounted crane that is easy to use, which can significantly improve the convenience of the staff using the crane to carry goods.

[0005] To achieve the above object, the utility model provides the following technical solutions:

[0006] A portable vehicle-mounted crane, characterized in that it includes a main body bracket, a mounting pipe, a boom, a self-locking winch, and a jack;

[0007] The mounting pipe is sleeved on the upper end of the main body bracket and can rotate circumferentially relative to the main body bracket. A first positioning structure for restricting the rotation of the mounting pipe is provided between the main body bracket and the mounting pipe;

[0008] One end of the boom is rotatably connected to the upper end of the mounting pipe, and the other end is far from the mounting pipe and can rotate up and down;

[0009] The base of the jack is rotatably connected to the mounting pipe, and the piston rod of the jack is rotatably connected to the boom, driving the boom to rotate up and down;

[0010] The self-locking winch is installed on the boom. The hoisting rope in the self-locking winch bypasses one end of the boom far away from the installation pipe and then hangs down naturally for hoisting goods.

[0011] Preferably, the main body bracket includes an installation base, a support round pipe and an extension pipe; the installation base is arranged at the lower end of the support round pipe, and the extension pipe is inserted into the upper end of the support round pipe for the installation pipe to be sleeved.

[0012] Preferably, the installation base includes an installation plate, a positioning plate and a locking member;

[0013] The installation plate is formed at the lower end position of the support round pipe;

[0014] There are two positioning plates, and they are in an L-shaped structure. The two positioning plates are arranged on the lower surface of the installation plate to form a positioning groove with the installation plate;

[0015] The locking member is arranged between the installation plate and the positioning plate and can fasten the installation base on the vehicle at the same time.

[0016] Preferably, the first positioning structure includes a first positioning hole opened on the main body bracket, a plurality of second positioning holes opened on the installation pipe and distributed along the circumference, and a first positioning pin inserted between the first positioning hole and the second positioning hole.

[0017] Preferably, the boom includes an outer pipe and an inner pipe. The inner pipe is inserted into the outer pipe and can axially move. A second positioning structure for restricting the movement of the inner pipe is arranged between the inner pipe and the outer pipe.

[0018] Preferably, the second positioning structure includes a third positioning hole opened on the inner pipe, a plurality of fourth positioning holes opened on the outer pipe and distributed along the axis, and a second positioning pin inserted between the third positioning hole and the fourth positioning hole.

[0019] The advantages of the present utility model are as follows:

[0020] 1. The main body bracket and the installation pipe can drive the boom to rotate circumferentially along the main body bracket, and the jack can drive one end of the boom far away from the main body bracket to swing up and down, realizing the adjustment in the height direction, facilitating the position adjustment of the end of the boom far away from the main body bracket to adapt to the position of the item to be loaded and unloaded, and being convenient to use;

[0021] 2. One end of the boom far away from the main body bracket is driven by the jack, significantly reducing the labor cost and being convenient to operate. Brief Description of the Drawings

[0022] Figure 1 It is a schematic diagram of the portable vehicle-mounted crane provided in this embodiment;

[0023] Figure 2Schematic diagram of the main bracket provided in this embodiment. Detailed implementation

[0024] Combine Figures 1 to 2 To further explain the portable vehicle-mounted crane of the present utility model.

[0025] A portable vehicle-mounted crane, characterized in that it includes a main bracket 1, a mounting pipe 3, a boom 2, a self-locking winch 4 and a jack 5.

[0026] The mounting pipe 3 is sleeved on the upper end of the main bracket 1 and can rotate circumferentially relative to the main bracket 1. A first positioning structure 6 for restricting the rotation of the mounting pipe 3 is provided between the main bracket 1 and the mounting pipe 3. One end of the boom 2 is rotatably connected to the upper end of the mounting pipe 3, and the other end is away from the mounting pipe 3 and can rotate up and down. The base of the jack 5 is rotatably connected to the mounting pipe 3, and the piston rod of the jack 5 is rotatably connected to the boom 2 to drive the boom 2 to rotate up and down. The self-locking winch 4 is installed on the boom 2. The lifting rope in the self-locking winch 4 bypasses one end of the boom 2 away from the mounting pipe 3 and then hangs down naturally for hoisting goods.

[0027] The main bracket 1 includes a mounting base 13, a support round pipe 12 and an extension pipe 11. The mounting base 13 is arranged at the lower end of the support round pipe 12. The extension pipe 11 is inserted into the upper end of the support round pipe 12 for the mounting pipe 3 to be sleeved. Specifically, a welding piece 111 is provided on the side wall at the lower end of the extension pipe 11 by welding. Through this welding piece 111, the side wall of the part of the lower end of the extension pipe 11 inserted into the support round pipe 12 can be tightened against the inner wall of the support round pipe 12 to realize the positioning of the extension pipe 11 in the support round pipe 12 and also avoid the problem of the extension pipe 11 shaking relative to the support round pipe 12.

[0028] In order to further enhance the axial supporting force of the support round pipe 12 on the extension pipe 11, an inner step is provided on the inner wall of the support round pipe 12 for the lower end wall of the extension pipe 11 or the welding piece 111 to abut against.

[0029] The main bracket 1 is formed by splicing the support round pipe 12 and the extension pipe 11, which can not only ensure the effective use height of the main bracket 1, but also split the two during transportation to reduce the length of the main bracket 1 for easy transportation.

[0030] A positioning ring 121 is provided on the outer side wall of the support round pipe 12. The handle 51 of the jack 5 can be vertically inserted into this positioning ring 121, which is convenient for the handle 51 of the jack 5 to be taken and used at any time.

[0031] The mounting base 13 includes a mounting plate 131, a positioning plate 132, and a locking member 134. The mounting plate 131 is formed at the lower end of the support circular tube 12 by welding and is fixed with reinforcing plates added in four directions. There are two positioning plates 132, which are L-shaped structures. The two positioning plates 132 are arranged on the lower surface of the mounting plate 131, forming a positioning groove 133 with the mounting plate 131. The locking member 134 is arranged between the mounting plate 131 and the positioning plate 132 and can fasten the mounting base 13 to the vehicle at the same time. The locking member 134 is a bolt and a nut. When the main body bracket 1 is fixed to the vehicle through the mounting base 13, the positioning groove 133 formed on the lower surface of the mounting base 13 is assembled to the square cross beam of the vehicle, and then the bolts in the locking member 134 are sequentially passed through the mounting plate 131, the positioning plate 132, and the connection holes on the cross beam, and then the nut is screwed on to fix the mounting base 13 to the vehicle for using the crane.

[0032] The installation tube 3 has a structure with an open lower end and a sealed upper end. The installation tube 3 is sleeved on the extension tube 11 through the open lower end and then supported at the upper end position of the extension tube 11 through the upper end plate to achieve the circumferential rotation function.

[0033] The first positioning structure 6 includes a first positioning hole opened on the extension tube 11 of the main body bracket 1, a plurality of second positioning holes 61 opened on the installation tube 3 and distributed along the circumference, and a first positioning pin 62 inserted between the first positioning hole and the second positioning holes 61. When the first positioning pin 62 is inserted between the extension tube 11 and the installation tube 3, the installation tube 3 is locked and cannot rotate. When the first positioning pin 62 is removed, the installation tube 3 can be rotated, and rotating the installation tube 3 can drive the boom 2 to rotate to adapt to the lifting position of the goods. In this embodiment, the installation tube 3 drives the boom 2 to rotate only in the horizontal direction without driving the goods to move in the height direction, so the operator can drag it casually. Therefore, in this embodiment, the installation tube 3 can be rotated manually.

[0034] A threaded hole is opened on the side wall of the installation tube 3 near the upper end, and a locking bolt 31 is fitted in the threaded hole. The end of the locking bolt 31 abuts against the extension tube 11 in the tightened state to ensure the stability of the installation tube 3 when it does not need to rotate.

[0035] On the side wall of the installation tube 3 near the upper end, there is an upper hinge seat 32 for the connection of one end of the boom 2 facing the installation tube 3, and on the side wall of the installation tube 3 near the lower end, there is a lower hinge seat 33 for the connection of the base of the jack 5.

[0036] The boom 2 includes an outer tube 22 with a square structure and an inner tube 21. The inner tube 21 is inserted into the outer tube 22 and can move axially. A second positioning structure 7 for restricting the movement of the inner tube 21 is provided between the inner tube 21 and the outer tube 22. When the inner tube 21 moves in the outer tube 22, the length of the entire boom 2 can be adjusted, and the load-bearing capacity of the boom 2 can also be adjusted to meet the lifting requirements of different goods.

[0037] The second positioning structure 7 includes a third positioning hole formed on the inner tube 21, a fourth positioning hole 72 formed on the outer tube 22 and axially distributed, and a second positioning pin 71 inserted between the third positioning hole and the fourth positioning hole 72. When the second positioning pin 71 is removed, the inner tube 21 can be pulled to move in the outer tube 22. When it moves to the required position, the second positioning pin 71 can be inserted.

[0038] An articulated seat 221 for connecting the piston rod of the jack 5 is provided on the lower surface of the outer tube 22.

[0039] In this application, the self-locking winch 4 is a prior art and can be directly purchased, so it will not be described in detail in this embodiment.

[0040] In specific use, the main body bracket 1 and the mounting tube 3 can drive the boom 2 to rotate circumferentially along the main body bracket 1. The jack 5 can drive one end of the boom 2 away from the main body bracket 1 to swing up and down, realizing the adjustment in the height direction, facilitating the position adjustment of one end of the boom 2 away from the main body bracket 1 to adapt to the position of the item to be loaded and unloaded, and being convenient for use. The height of one end of the boom 2 away from the main body bracket 1 is driven by the jack 5, significantly reducing the labor cost and being convenient for operation.

[0041] Unless otherwise specified, in this utility model, if there are terms such as "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicating the orientation or positional relationship, they are based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing this utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, the terms describing the orientation or positional relationship in this utility model are only for exemplary illustration and cannot be understood as a limitation of this patent. For those of ordinary skill in the art, the specific meanings of the above terms can be understood by combining the drawings and according to the specific situation.

[0042] Unless otherwise clearly defined and limited, in this utility model, if there are terms such as "set", "connected" and "connected", they should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected, or indirectly connected through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in this utility model can be understood according to specific situations.

[0043] The above are only the preferred embodiments of this utility model, and the protection scope of this utility model is not limited to the above embodiments. All technical solutions falling within the idea of this utility model belong to the protection scope of this utility model. It should be pointed out that for those of ordinary skill in the technical field, several improvements and refinements made without departing from the principle of this utility model should also be regarded as the protection scope of this utility model.

Claims

1. A portable vehicle-mounted crane, characterized in that: Includes main frame, mounting tube, boom, self-locking winch and jack; The mounting pipe is sleeved on the upper end of the main body support and can rotate circumferentially relative to the main body support. A first positioning structure for limiting the rotation of the mounting pipe is provided between the main body support and the mounting pipe. One end of the suspension arm is rotatably connected to the upper end of the mounting tube, and the other end is away from the mounting tube and can rotate up and down; The base of the jack is rotatably connected to the mounting pipe, and the piston rod of the jack is rotatably connected to the boom, driving the boom to rotate up and down; The self-locking winch is installed on the boom, and the hoisting rope in the self-locking winch is naturally drooped after passing around the end of the boom away from the mounting pipe for cargo hoisting.

2. The portable vehicle-mounted crane according to claim 1, characterized in that: The main support comprises a mounting base, a supporting circular tube and an extension tube; the mounting base is arranged at the lower end of the supporting circular tube, and the extension tube is inserted at the upper end of the supporting circular tube for mounting the tube sleeve.

3. The portable vehicle-mounted crane according to claim 2, characterized in that: The mounting base comprises a mounting plate, a positioning plate and a locking member; The mounting plate is formed at the lower end of the supporting circular tube; The two positioning plates are L-shaped and are arranged on the lower surface of the mounting plate to form positioning grooves with the mounting plate. The locking member is arranged between the mounting plate and the positioning plate, and can fasten the mounting base to the vehicle at the same time.

4. The portable vehicle-mounted crane according to claim 1, characterized in that: The first positioning structure includes a first positioning hole formed on the main frame, a plurality of second positioning holes formed on the mounting tube and distributed along the circumference, and a first positioning pin inserted between the first positioning hole and the second positioning hole.

5. The portable vehicle-mounted crane according to claim 1, characterized in that: The boom comprises an outer tube and an inner tube, wherein the inner tube is inserted into the outer tube and can move axially, and a second positioning structure for limiting the movement of the inner tube is arranged between the inner tube and the outer tube.

6. The portable vehicle-mounted crane according to claim 5, characterized in that: The second positioning structure includes a third positioning hole formed on the inner tube, a plurality of fourth positioning holes formed on the outer tube and distributed along the axial direction, and a second positioning pin inserted between the third positioning hole and the fourth positioning hole.

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