CN210855061U - Telescopic support leg and crane - Google Patents

Abstract

The utility model provides a telescopic leg and hoist belongs to movable leg technical field, including landing leg case, movable leg, extending structure and driving piece, movable leg cover is established the landing leg incasement, extending structure's one end with the driving piece transmission is connected, extending structure's the other end with movable leg connects, is used for making movable leg for the telescopic movement of landing leg case. The driving piece is used as a driving action executing element of the telescopic supporting leg, the telescopic structure is used as a supporting element to support the supporting leg box and the movable supporting leg and bear the external load for the supporting leg box and the movable supporting leg, the driving piece and the telescopic structure are separately and independently arranged, so that the driving piece does not need to bear the load of the movable supporting leg, the deformation and the running edge of the movable supporting leg do not have any influence on the driving piece, the damage probability of the driving piece is reduced, and the normal work of the telescopic supporting leg is ensured.

Description

Telescopic support leg and crane

Technical Field

The utility model relates to a movable support leg technical field particularly, relates to a flexible landing leg and hoist.

Background

The support legs are structures commonly used on engineering machinery equipment and are used for supporting the machinery equipment and stabilizing the machinery equipment so as to carry out engineering operation. To facilitate the operation, the supporting legs are usually of a telescopic structure.

As shown in fig. 1, an existing telescopic leg generally adopts a telescopic arm structure, one end of a horizontal oil cylinder 2 is fixed in a fixed leg box 1, a piston rod of the horizontal oil cylinder 2 is connected with an existing movable leg 3, the existing movable leg 3 is made to be telescopic along the inside of the fixed leg box 1 through the extension and contraction of the piston rod, and an existing vertical oil cylinder 4 is used for providing power for supporting mechanical equipment.

However, in this structure, the horizontal cylinder 2 is both an action executing mechanism and a supporting mechanism, and under the condition that the existing movable supporting leg 3 runs and deforms, the piston rod of the horizontal cylinder 2 is easily deformed, so that the horizontal cylinder 2 is directly scrapped, and the overall work of the telescopic supporting leg is influenced.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a flexible landing leg and hoist through setting up driving piece and extending structure respectively, avoids movable landing leg to warp the influence to the driving piece.

The embodiment of the utility model is realized like this:

an aspect of the embodiment of the utility model provides a telescopic leg, it includes landing leg case, movable leg, extending structure and driving piece, movable leg overlaps and establishes the landing leg incasement, extending structure's one end with the driving piece transmission is connected, extending structure's the other end with movable leg connects, is used for making movable leg for the telescopic movement of landing leg case.

Optionally, the telescopic structure comprises a screw rod, a nut and a nut seat, the nut is sleeved on the screw rod, the nut is sleeved in the nut seat, and the nut seat is connected with the movable support leg.

Optionally, the mating surfaces of the nut and the nut seat are spherical surfaces.

Optionally, the driving member is a motor, and one end of the screw is in transmission connection with the motor through a universal joint.

Optionally, still include the mount pad, establish bearing frame in the mount pad and establish bearing in the bearing frame, the screw rod is close to the one end of driving piece is worn to establish in the bearing, the mount pad with the landing leg case is connected.

Optionally, the bearing is a double row tapered roller bearing.

Optionally, the mating surfaces of the bearing seat and the mounting seat are spherical surfaces.

Optionally, the support assembly is further included, a sliding groove is formed in the movable supporting leg, one end of the support assembly is arranged in the supporting leg box, and the other end of the support assembly penetrates through the sliding groove to be connected with the screw rod.

Optionally, the support subassembly include support, connecting handle and with the connecting seat that the support is connected, the support is established the landing leg incasement, the one end of connecting handle is established on the connecting seat, the other end passes the spout, the connecting handle passes the one end of spout is equipped with the shaft hole, the tip of screw rod is worn to establish in the shaft hole.

The utility model discloses another aspect of the embodiment provides a crane, and it includes crane body and foretell telescopic leg, telescopic leg is located crane body's bottom for the auxiliary stay crane body.

The utility model discloses beneficial effect includes:

the embodiment of the utility model provides a telescopic leg and hoist, the driving piece is as telescopic leg's drive action execute component, extending structure supports landing leg case and activity landing leg as the supporting element, and bear the outside load of giving landing leg case and activity landing leg, through separately independently setting up driving piece (execute component) and extending structure (supporting element), make the driving piece need not bear the load of activity landing leg, the deformation of activity landing leg, the limit runs and does not have any influence to the driving piece, the damage probability of driving piece has been reduced, ensure telescopic leg's normal work.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention, and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.

FIG. 1 is a schematic structural view of a conventional telescopic leg;

fig. 2 is a schematic structural view of a telescopic leg provided in an embodiment of the present invention;

fig. 3 is a schematic structural diagram of a nut assembly according to an embodiment of the present invention;

fig. 4 is a second schematic structural view of the nut assembly according to the embodiment of the present invention;

fig. 5 is a schematic structural diagram of a supporting and positioning assembly according to an embodiment of the present invention;

fig. 6 is a second schematic structural view of a supporting and positioning assembly according to an embodiment of the present invention;

fig. 7 is a schematic structural diagram of a support assembly according to an embodiment of the present invention;

fig. 8 is a second schematic structural diagram of a support assembly according to an embodiment of the present invention.

Icon 1-fixed leg box; 2-horizontal oil cylinder; 3-existing movable legs; 4-existing vertical oil cylinder; 10-a drive member; 20-a universal joint; 30-supporting a positioning assembly; 31-a bearing; 32-a bearing seat; 33-a mounting seat; 40-screw rod; 50-a leg box; 60-a nut assembly; 61-a nut; 62-nut seats; 63-bolt; 70-a movable leg; 71-a chute; 80-a seat assembly; 81-support; 82-a standoff bolt; 83-a connecting handle; 84-a connection seat; 90-vertical oil cylinder.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention, as generally described and illustrated in the figures herein, may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present invention, presented in the accompanying drawings, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.

Referring to fig. 2, the present embodiment provides a telescopic leg, which includes a leg box 50, a movable leg 70, a telescopic structure and a driving member 10, wherein the movable leg 70 is sleeved in the leg box 50, one end of the telescopic structure is in transmission connection with the driving member 10, and the other end of the telescopic structure is connected with the movable leg 70, so as to enable the movable leg 70 to move telescopically relative to the leg box 50.

First, the leg box 50 and the movable leg 70 are connected by a telescopic structure, so that the movable leg 70 can move in the leg box 50 in a telescopic manner.

Secondly, the driving member 10 provides power for the telescopic structure to extend and retract, and drives the telescopic structure to extend and retract, and the driving member 10 is exemplarily disposed in the leg box 50 and fixedly connected to the leg box 50. Of course, the driving member 10 may be disposed outside the leg box 50 and fixedly connected to the leg box 50.

In this embodiment, the driving member 10 may be a hydraulic motor, or a rotary driving member such as an electric motor. The rotation direction of the hydraulic motor is realized by a reversing valve. The direction of rotation of the electric motor is achieved by an electrical control signal.

The embodiment of the utility model provides a telescopic leg, driving piece 10 acts as telescopic leg's drive action execute component, extending structure supports landing leg case 50 and activity landing leg 70 as supporting element, and bear the outside load of giving landing leg case 50 and activity landing leg 70, through separately independent setting with driving piece 10 (execute component) and extending structure (supporting element), make driving piece 10 need not bear the load of activity landing leg 70, the deformation of activity landing leg 70, the limit of running does not have any influence to driving piece 10, the damage probability of driving piece 10 has been reduced, ensure telescopic leg's normal work.

In the prior art, the telescopic rod of the horizontal oil cylinder 2 extends along with the extension and contraction of the existing movable supporting leg 3 in the existing movable supporting leg 3, so that a pipeline connected with the horizontal oil cylinder 2 needs to be arranged longer, and the horizontal oil cylinder 2 is ensured to supply power media along with the extension and contraction of the horizontal oil cylinder 2. In the telescopic leg of the present embodiment, the driving member 10 is disposed in the leg box 50, and does not need to move along with the extension and retraction of the movable leg 70, which greatly reduces the length of the pipeline required for the movement of the whole set of telescopic leg, is beneficial to reducing the working failure rate, and can reduce the cost.

On the other hand, the telescopic length of the existing support leg is completely solved by the telescopic length of a piston rod of the horizontal oil cylinder 2, the horizontal oil cylinder 2 is directly placed inside the support leg during installation, a related hydraulic oil pipe needs to move inside the support leg, the support leg has certain relative movement when telescopic, and the risk of breaking the oil pipe is increased. In the telescopic leg of the embodiment, the movable leg 70 is telescopic by the screw transmission of the screw 40 and the nut 61, and the driving member 10 is not arranged in the movable leg 70, so that the pipeline connected with the driving member 10 is not required to be arranged in the movable leg 70, and the risk of pipeline damage is reduced. For example, when the driving member 10 is a hydraulic motor, a high-pressure hydraulic oil pipe is not needed to run inside the supporting leg, and the probability of oil pipe abrasion is reduced.

Specifically, the telescopic structure comprises a screw 40, a nut 61 and a nut seat 62, as shown in fig. 3 and 4, the nut 61 and the nut seat 62 form a nut assembly 60, the screw 40 is sleeved with the nut 61, the nut 61 is sleeved in the nut seat 62, the nut seat 62 is connected with a movable leg 70 through two bolts 63, and the nut assembly 60 and the screw 40 form a screw-nut pair.

When the screw 40 rotates, the nut 61 moves linearly on the screw 40, and simultaneously the nut 61 rotates in the nut seat 62, so that the nut seat 62 is driven to move linearly on the screw 40, and the rotational motion of the screw 40 is converted into the linear motion of the nut 61 through the screw transmission of the screw 40 and the nut 61. The linear movement of the nut assembly 60 will directly result in linear movement of the movable leg 70.

Furthermore, the matching surface of the nut 61 and the nut seat 62 is a spherical surface, so that the nut 61 and the screw 40 are coaxial, the nut 61 is ensured to stably move on the screw 40, and the movable support leg 70 is stably extended and retracted.

When the existing supporting leg is used for hoisting in a fully extended state, the supporting leg can stretch and shake, so that the situation that the horizontal oil cylinder 2 and an oil circuit are passively suppressed in the whole hoisting process is caused, and the leakage of a system is increased. In this embodiment, when the movable leg 70 is suspended in the fully extended state (i.e. the movable leg 70 is fully extended out of the leg box 50), the problem of telescopic shaking is completely solved by the self-locking action of the screw-nut pair formed by the screw 40 and the nut 61, and the leakage risk of the hydraulic system is reduced.

According to the scheme, the screw transmission of the screw 40 and the nut 61 can be self-locked as long as the lead angle of the screw 40 is smaller than the friction angle of the screw, the state is kept by the self-locking of the screw transmission pair completely during hoisting, the pipelines and related hydraulic pipelines in the whole telescopic supporting leg do not have any passive pressure building condition, and the system leakage condition is greatly reduced.

One end (the one end of screw rod 40) and the driving piece 10 transmission of extending structure are connected, and the one end of screw rod 40 is connected with the motor transmission promptly, is equipped with universal joint 20 between the tip of screw rod 40 and the motor, and universal joint 20 links together hydraulic motor (electric motor) and screw rod 40 through flat key or flower key, connects screw rod 40 and motor through universal joint 20, can play the effect of transmission moment of torsion and fine setting direction.

One end of the screw 40 is in transmission connection with the motor through the universal joint 20, and at the same time, the end of the screw 40 is fixed to support and position the screw 40, so as to ensure the stable rotation of the screw 40, and the end of the screw 40 is fixed through the support positioning assembly 30 and the leg box 50.

As shown in fig. 5 and 6, the supporting and positioning assembly 30 includes a mounting seat 33, a bearing seat 32 disposed in the mounting seat 33, and a bearing 31 disposed in the bearing seat 32, a screw 40 is inserted into the bearing 31, the screw 40 can rotate in the bearing 31, and the mounting seat 33 is fixedly connected to the leg box 50 through a bolt 63.

The bearing 31 is a double-row tapered roller bearing 31, the double-row tapered roller bearing 31 can bear axial force and radial force, and the double-row tapered roller bearing 31 supports the rotation of the screw 40 and the axial positioning of the screw 40.

The bearing seat 32 is arranged in the mounting seat 33, and the matching surfaces of the bearing seat 32 and the mounting seat 33 are spherical surfaces, so that the bearing seat 32 has a certain angle fine adjustment function in the direction X, Y, and the relative position of the bearing seat 32 and the mounting seat 33 can be adjusted.

The other end of the screw 40, i.e., the end of the screw 40 remote from the driver 10, at which the screw 40 is supported in place by the bearing assembly 80.

As shown in fig. 2, the movable leg 70 is provided with a sliding groove 71, one end of the support assembly 80 is arranged in the leg box 50, and the other end passes through the sliding groove 71 to be connected with the screw 40.

When the movable supporting leg 70 extends and contracts, the support assembly 80 is also connected with the screw 40 at the same time, the support assembly 80 does not move relative to the movable supporting leg 70, the position of the support assembly 80 is fixed, and the sliding groove 71 is arranged, so that the movable supporting leg 70 extends and contracts, and the interference between the movable supporting leg 70 and the support assembly 80 is avoided.

As shown in fig. 7 and 8, the support assembly 80 includes two supports 81, a connecting seat 84 connected to the support 81, and a connecting handle 83 connected to the connecting seat 84, the two supports 81 are oppositely disposed and fixed in the movable leg 70, the two supports 81 are connected to the connecting seat 84 through a support bolt 82, one end of the connecting handle 83 is inserted into the connecting seat 84, the other end of the connecting handle 83 is inserted into the sliding groove 71, and an axial hole is formed at the end of the connecting handle 83, the end of the screw 40 is inserted into the axial hole of the connecting handle 83, and the screw 40 can rotate in the axial hole of the connecting handle 83.

The end of the screw 40 is fixed to the leg box 50 by a seat assembly 80 to support the end of the screw 40.

The movable leg 70 includes a leg body that extends and retracts inside the leg box 50, and a vertical cylinder 90 provided at an end of the leg body remote from the driving member 10.

The working principle of the telescopic supporting leg of the embodiment is as follows: taking the driving member 10 as an example of a hydraulic motor, when the hydraulic motor rotates in a first direction (counterclockwise), the rotation of the hydraulic motor is transmitted to the screw rod 40 through the universal joint 20, because the nut component 60 is positioned in the circumferential direction, the screw rod 40 is axially positioned and fixed on the leg box 50 through the supporting and positioning component 30, the nut 61 converts the circumferential rotation of the screw rod 40 into the linear motion of the nut 61, the nut 61 moves linearly towards the end far away from the hydraulic motor relative to the screw rod 40, and the nut 61 is hinged with the movable leg 70 through two pin shafts, so that the nut 61 drives the movable leg 70 to move linearly towards the end far away from the hydraulic motor together, that is, the movable leg 70 extends out of the leg box 50. When the hydraulic motor is rotated in a second (clockwise) direction, the movable leg 70 is retracted into the leg housing 50, in the same manner as the witness marks.

In summary, the telescopic leg of the present embodiment has the following advantages:

1) the damage probability of the driving piece 10 is reduced, and the normal work of the telescopic supporting leg is ensured;

2) when the movable supporting leg 70 is suspended and loaded in the fully extended state, the leakage risk of a hydraulic system is reduced;

3) the length of the pipeline required by the movement of the whole set of telescopic supporting legs is greatly reduced, the reduction of the working failure rate is facilitated, and the cost can be reduced;

4) the risk of pipeline breakage is reduced;

5) the whole telescopic supporting leg is simple in structure and compact in arrangement.

The embodiment of the utility model provides a still disclose a crane, including crane body and the flexible landing leg as above embodiment. The crane body is a crane in the conventional sense, and has all the structures and functions of the crane. The telescopic support leg is located at the bottom of the crane body, the crane body works, the suspension arm of the crane body is moved to hoist, so that the gravity center of the suspension arm can shift, the crane body is unstable and inclines to avoid the gravity center shift, the telescopic support leg located at the bottom of the crane body stretches out and draws back as required, the gravity center of the crane body is balanced and the crane body works stably due to the fact that the telescopic support leg extends out and draws back as required.

The crane comprises the same structure and benefits as the telescopic legs in the previous embodiments. The structure and advantages of the telescopic leg have been described in detail in the foregoing embodiments, and are not described in detail herein.

Of course, the telescopic support leg of the embodiment can be applied to other engineering mechanical equipment besides the crane.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (10)

1. A telescoping leg, comprising: landing leg case (50), activity landing leg (70), extending structure and driving piece (10), activity landing leg (70) cover is established in landing leg case (50), extending structure's one end with driving piece (10) transmission is connected, extending structure's the other end with activity landing leg (70) are connected, are used for making activity landing leg (70) for landing leg case (50) flexible removal.

2. The telescopic leg according to claim 1, wherein the telescopic structure comprises a screw (40), a nut (61) and a nut seat (62), the nut (61) is sleeved on the screw (40), the nut (61) is sleeved in the nut seat (62), and the nut seat (62) is connected with the movable leg (70).

3. Telescopic leg according to claim 2, wherein the mating surfaces of the nut (61) and the nut seat (62) are spherical.

4. Telescopic leg according to claim 2, wherein the drive (10) is a motor, one end of the screw (40) being in driving connection with the motor via a universal joint.

5. The telescopic leg according to claim 2, further comprising a mounting seat (33), a bearing seat (32) arranged in the mounting seat (33), and a bearing (31) arranged in the bearing seat (32), wherein one end of the screw (40) close to the driving part (10) is arranged in the bearing (31) in a penetrating manner, and the mounting seat (33) is connected with the leg box (50).

6. Telescopic leg according to claim 5, the bearing (31) being a double row tapered roller bearing.

7. Telescopic leg according to claim 5, wherein the mating surfaces of the bearing seat (32) and the mounting seat (33) are spherical.

8. The telescopic leg according to claim 5, further comprising a support assembly (80), wherein the movable leg (70) is provided with a sliding groove (71), one end of the support assembly (80) is arranged in the leg box (50), and the other end of the support assembly passes through the sliding groove (71) to be connected with the screw rod (40).

9. The telescopic leg according to claim 8, wherein the support assembly (80) comprises a support (81), a connecting handle (83) and a connecting seat (84) connected with the support (81), the support (81) is arranged in the leg box (50), one end of the connecting handle (83) is arranged on the connecting seat (84), the other end of the connecting handle passes through the sliding groove (71), one end of the connecting handle (83) passing through the sliding groove (71) is provided with a shaft hole, and the end of the screw rod (40) is arranged in the shaft hole in a penetrating manner.

10. A crane comprising a crane body and a telescopic leg as claimed in any one of claims 1 to 9 at the bottom of the crane body for assisting in supporting the crane body.

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