Slewing device for lorry-mounted crane

Abstract

The utility model discloses a slewing device for a lorry-mounted crane, which relates to the field of cranes, solves the problem of poor pressure bearing effect of a single ball sleeve of the existing slewing device, and adopts the following scheme that the slewing device comprises an outer shaft seat and an inner shaft seat, and the outer shaft seat and the inner shaft seat are arranged between a transport cart plate on the bottom side and the crane; the outer shaft seat and the inner shaft seat are both formed by welding vertical rings and inclined rings, an upper group of upper outer bead grooves and a lower group of lower outer bead grooves are formed in the inner wall of the outer shaft seat, and an upper group of upper inner bead grooves and a lower group of lower inner bead grooves which are opposite in position are formed in the outer wall of the inner shaft seat; according to the slewing device for the lorry-mounted crane, the upper balls and the lower balls are arranged between the outer shaft seats and the inner shaft seats, so that the crane can be assisted to freely rotate on a transport cart plate on the bottom side, the steering effect is achieved, meanwhile, the outer shaft seats and the inner shaft seats are sleeved in a sliding mode, one group is assembled in a flat mode, and the other group is assembled in an inclined mode; therefore, large pressure can be borne on the inclined face, and the pressure bearing effect of the device is guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of cranes, in particular to a slewing device for a truck-mounted crane. Background Art

[0002] Truck mounted crane is a new type of efficient lifting and transportation equipment mounted on a car chassis, integrating lifting and transportation. It consists of an upper part and an lower part, which are connected to the outer ring and inner ring of the slewing bearing respectively by bolts.

[0003] After searching, the application with patent application number CN201520457843.4 discloses an anti-rotation device for a truck crane, which belongs to the technical field of truck cranes. In order to solve the technical problem that the upper part of the vehicle is prone to abnormal rotation during driving, the utility model provides an anti-rotation device for a truck crane with a simple structure and high reliability, which can effectively prevent the crane from abnormally rotating during the driving of the truck crane transport vehicle. The technical scheme adopted is to include a support ear arranged on the bottom connecting plate of the slewing column and a mounting plate arranged on the frame, a through hole is arranged on the support ear, an anti-rotation sleeve is arranged on the mounting plate, the anti-rotation sleeve is arranged concentrically with the through hole, an anti-rotation pin is arranged in the through hole, the bottom of the anti-rotation pin is inserted in the anti-rotation sleeve, and a handle is arranged on the top of the anti-rotation pin;

[0004] The above application document achieves the purpose of preventing the crane from rotating by setting up various components, but the traditional slewing bearing is composed of an inner ring and an outer ring, and the bearing balls therebetween realize relative rotation. Although this can realize rotation, its pressure-bearing capacity is limited. In particular, during the rotation of the crane, the gravity will change accordingly, and the oblique upward pressure is relatively large, which can easily cause it to be damaged by pressure during the continuous operation of the crane.

[0005] Therefore, we propose a slewing device for a truck-mounted crane. Utility Model Content

[0006] In view of the deficiencies in the prior art, the utility model provides a slewing device for a truck-mounted crane, which solves the problem that the pressure-bearing effect of a single ball set of the prior slewing device is poor.

[0007] To achieve the above purpose, the utility model is implemented through the following technical solutions: a slewing device for a truck-mounted crane, comprising an outer shaft seat and an inner shaft seat, and the outer shaft seat and the inner shaft seat are arranged between the bottom transport vehicle plate and the crane;

[0008] The outer shaft seat and the inner shaft seat are both welded by vertical rings and oblique rings, and the inner wall of the outer shaft seat is provided with two sets of upper outer bead grooves and lower outer bead grooves, and the outer wall of the inner shaft seat is provided with two sets of upper inner bead grooves and lower inner bead grooves that are positioned opposite to each other, and upper balls and lower balls are rotatably mounted between the upper outer bead grooves and the upper inner bead grooves, and between the lower outer bead grooves and the lower inner bead grooves.

[0009] Preferably, fifty groups of upper balls are rotatably mounted between the upper outer ball groove and the upper inner ball groove, and fifty groups of lower balls are rotatably mounted between the lower outer ball groove and the lower inner ball groove, and isolation blocks are clamped between adjacent upper balls and lower balls.

[0010] Among them, the setting of the isolation block can assist the upper balls and the lower balls distributed in a circle to slide between the outer shaft seat and the inner shaft seat, thereby ensuring the rotation effect and increasing the stability of the sliding set.

[0011] Preferably, an inclined receiving groove is provided on the inner side wall of the inner shaft seat, the receiving groove is a rectangular groove, and the top side and the inner side of the receiving groove are slotted;

[0012] Among them, the setting of the receiving groove makes it easy for the oblique gear seat at the bottom of the crane to be clamped on the inner side of the inner shaft seat, ensuring the stability of the clamping and being able to withstand greater oblique upward pressure.

[0013] Preferably, the inner side of the receiving groove is engaged with an oblique gear seat fixedly mounted on the bottom of the crane.

[0014] Preferably, an inner shaft seat is slidably sleeved on the inner side of the outer shaft seat, and the bottom of the outer shaft seat is fixedly mounted on the top of the transport vehicle.

[0015] Preferably, the top of the inner axle seat is fixedly mounted on the bottom of the transport vehicle.

[0016] The utility model provides a slewing device for a truck-mounted crane, which has the following beneficial effects:

[0017] The slewing device for the truck crane can assist the crane to freely rotate on the bottom transport vehicle plate by arranging the upper ball and the lower ball between the outer shaft seat and the inner shaft seat to achieve the steering effect. At the same time, the outer shaft seat and the inner shaft seat have two sets of sliding sets, one set is flatly assembled and the other set is obliquely assembled, so that a large pressure can be withstood on the oblique surface, thereby ensuring the pressure-bearing effect of the device, and solving the problem that the pressure-bearing effect of the single ball set of the existing slewing device is poor. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the structure of the utility model;

[0019] Figure 2 It is a schematic diagram of the structure of the inner side of the utility model;

[0020] Figure 3 This is a schematic diagram of the structure of the outer shaft seat of the utility model;

[0021] Figure 4 It is a structural schematic diagram of the inner shaft seat of the utility model.

[0022] In the figure: 1, outer shaft seat; 11, upper outer bead groove; 12, lower outer bead groove; 2, inner shaft seat; 21, upper inner bead groove; 22, lower inner bead groove; 23, receiving groove; 3, upper ball; 4, lower ball; 5, isolation block. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model. Example

[0024] A slewing device for a truck-mounted crane comprises an outer shaft seat 1 and an inner shaft seat 2, wherein the outer shaft seat 1 and the inner shaft seat 2 are arranged between a bottom transport vehicle plate and a crane; the outer shaft seat 1 and the inner shaft seat 2 are welded by vertical rings and oblique rings, the inner wall of the outer shaft seat 1 is provided with two groups of upper outer bead grooves 11 and lower outer bead grooves 12, the outer wall of the inner shaft seat 2 is provided with two groups of upper inner bead grooves 21 and lower inner bead grooves 22 which are opposite to each other, and upper balls 3 and lower balls 4 are rotatably mounted between the upper outer bead grooves 11 and the upper inner bead grooves 21 and the lower outer bead grooves 12 and the lower inner bead grooves 22;

[0025] Among them, the slewing device for the truck crane can utilize the auxiliary crane to freely rotate on the bottom transport vehicle plate to achieve the steering effect by arranging the upper ball 3 and the lower ball 4 between the outer axle seat 1 and the inner axle seat 2. At the same time, the outer axle seat 1 and the inner axle seat 2 are two sets of sliding sets, and one set is flatly assembled and the other set is obliquely assembled, resulting in the ability to withstand greater pressure on the oblique surface, ensuring the pressure-bearing effect of the device, and solving the problem of poor pressure-bearing effect of a single ball set of the existing slewing device. Example

[0026] Fifty groups of upper balls 3 are rotatably mounted between the upper outer ball groove 11 and the upper inner ball groove 21, and fifty groups of lower balls 4 are rotatably mounted between the lower outer ball groove 12 and the lower inner ball groove 22. Isolation blocks 5 are mounted between adjacent upper balls 3 and lower balls 4. The isolation blocks 5 can assist the upper balls 3 and lower balls 4 distributed in a circle to slide between the outer shaft seat 1 and the inner shaft seat 2, thereby ensuring the rotation effect and increasing the stability of the sliding set.

[0027] An inclined receiving groove 23 is provided on the inner wall of the inner shaft seat 2. The receiving groove 23 is a rectangular groove, and the top side and the inner side of the receiving groove 23 are slotted. The setting of the receiving groove 23 facilitates the oblique gear seat at the bottom of the crane to be clamped on the inner side of the inner shaft seat 2, ensuring the stability of the clamping and being able to withstand greater oblique upward pressure.

[0028] The inner side of the receiving groove 23 is meshed with an oblique gear seat fixedly installed at the bottom of the crane; the inner side of the outer shaft seat 1 is slidably sleeved with the inner shaft seat 2, and the bottom of the outer shaft seat 1 is fixedly installed on the top of the transport vehicle; the top of the inner shaft seat 2 is fixedly installed on the bottom of the transport vehicle.

[0029] The working principle and use process of the utility model are as follows: when the device is required to work, the upper ball 3 and the lower ball 4 and the isolation block 5 therebetween are slidably mounted in the two groups of rolling grooves between the outer shaft seat 1 and the inner shaft seat 2. When working, the inner shaft seat 2 is driven by a crane to freely rotate on the inner side of the outer shaft seat 1. At the same time, the setting of its oblique components not only increases the oblique upward pressure bearing capacity, but also the setting of the two groups of sliding sets also ensures the stability of its assembly.

[0030] The above shows and describes the basic principles and main features of the utility model and the advantages of the utility model. For those skilled in the art, it is obvious that the utility model is not limited to the details of the above exemplary embodiments, and can be implemented in other specific forms without departing from the spirit or basic features of the utility model. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-restrictive. The scope of the utility model is limited by the attached claims rather than the above description, and it is intended to include all changes within the meaning and scope of the equivalent elements of the claims. Any figure mark in the claims should not be regarded as limiting the claims involved.

[0031] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A slewing device for a truck-mounted crane, comprising an outer shaft seat (1) and an inner shaft seat (2), wherein the outer shaft seat (1) and the inner shaft seat (2) are arranged between a bottom transport vehicle plate and the crane; Features: The outer shaft seat (1) and the inner shaft seat (2) are both welded by vertical rings and oblique rings. The inner wall of the outer shaft seat (1) is provided with two groups of upper outer bead grooves (11) and lower outer bead grooves (12). The outer wall of the inner shaft seat (2) is provided with two groups of upper inner bead grooves (21) and lower inner bead grooves (22) that are opposite to each other. Upper balls (3) and lower balls (4) are rotatably mounted between the upper outer bead grooves (11) and the upper inner bead grooves (21) and between the lower outer bead grooves (12) and the lower inner bead grooves (22).

2. The slewing device for a truck-mounted crane according to claim 1, characterized in that: Fifty groups of upper balls (3) are rotatably mounted between the upper outer ball groove (11) and the upper inner ball groove (21) and are distributed in an interval manner. Fifty groups of lower balls (4) are also rotatably mounted between the lower outer ball groove (12) and the lower inner ball groove (22), and isolation blocks (5) are clamped between adjacent upper balls (3) and lower balls (4).

3. The slewing device for a truck-mounted crane according to claim 1, characterized in that: An inclined receiving groove (23) is provided on the inner side wall of the inner shaft seat (2); the receiving groove (23) is a rectangular groove, and the top side and the inner side of the receiving groove (23) are slotted.

4. The slewing device for a truck-mounted crane according to claim 3, characterized in that: The inner side of the receiving groove (23) is meshed with an oblique gear seat fixedly mounted on the bottom of the crane.

5. The slewing device for a truck-mounted crane according to claim 1, characterized in that: The inner side of the outer shaft seat (1) is slidably sleeved with an inner shaft seat (2), and the bottom of the outer shaft seat (1) is fixedly mounted on the top of the transport vehicle.

6. The slewing device for a truck-mounted crane according to claim 1, characterized in that: The top of the inner axle seat (2) is fixedly mounted on the bottom of the transport vehicle.

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