Automatic locking device for supporting legs of concrete pump truck and concrete pump truck

Abstract

The utility model belongs to the technical field of concrete pump trucks, and discloses an automatic locking device for supporting legs of a concrete pump truck and the concrete pump truck. The automatic locking device for the supporting leg of the concrete pump truck is applied to the concrete pump truck, and before pumping concrete construction, the retraction driving mechanism acts to drive the lock shaft to retract relative to the lock body, the lock shaft is separated from the moving path of the spring bolt, and the inner supporting leg extends out relative to the outer supporting leg; when the supporting legs need to be retracted before the pump truck runs, the inner supporting leg retracts relative to the outer supporting leg, the lock shaft is pushed to retract relative to the lock body by external force generated when the lock tongue on the inner supporting leg extrudes the lock shaft, and after the inner supporting leg retracts relative to the outer supporting leg, the lock shaft stretches out relative to the lock body under the elastic force action of the elastic piece so as to stop the lock tongue and stop the inner supporting leg from stretching out relative to the outer supporting leg. Automatic locking and unlocking of the supporting leg are achieved through the stretching and retracting processes of the supporting leg and cooperation of the lock shaft and the lock tongue, potential safety hazards of the supporting leg are reduced, and the working efficiency of the concrete pump truck is further improved.

Description

Technical Field

[0001] The utility model relates to the technical field of concrete pump trucks, in particular to an automatic locking device for supporting legs of a concrete pump truck. Background Art

[0002] Concrete pump trucks are machines that use pressure to continuously pump concrete along pipes. They are widely used in construction projects, significantly improving construction efficiency. Concrete pump trucks are categorized by their structural type: piston, extrusion, or hydraulic diaphragm. The pump body is mounted on a vehicle chassis and connected to a retractable or flexing boom and delivery pipe to deliver concrete to a specific height and distance. Current concrete pump trucks require the chassis outriggers to be extended before pumping concrete to provide stable support for the truck. Before the truck can begin driving, the outriggers must be retracted to ensure safe operation. To achieve this, chains are often used to connect the outriggers to the chassis after retraction to prevent them from extending. However, this chain connection requires manual locking of the outriggers after each retraction. If the operator inadvertently forgets to lock the outriggers, this poses a safety hazard and is cumbersome, hindering efficient operation. Utility Model Content

[0003] The purpose of the utility model is to provide an automatic locking device for a concrete pump truck outrigger and a concrete pump truck, so as to realize automatic locking and unlocking of the outrigger.

[0004] In order to achieve the above-mentioned purpose, the present invention adopts the following technical solutions:

[0005] An automatic locking device for a concrete pump truck support leg, comprising:

[0006] External outriggers, installed on the concrete pump truck body;

[0007] An inner leg is located inside the outer leg and can be extended and retracted relative to the outer leg, and a locking tongue is provided on the side wall of the inner leg;

[0008] A lock body is provided on the outer leg;

[0009] The lock shaft can be extended and retracted relative to the lock body, and an elastic member is connected to the lock body; under the elastic force of the elastic member, the lock shaft extends relative to the lock body; after the lock shaft extends relative to the lock body, the lock shaft is located in the movement path of the lock tongue; an external force can push the lock shaft to retract relative to the lock body, while overcoming the elastic force of the elastic member; after the lock shaft retracts relative to the lock body, the lock shaft is out of the movement path of the lock tongue;

[0010] The retraction drive mechanism operates to drive the lock shaft to retract relative to the lock body.

[0011] Furthermore, the lower end of the lock body is provided with a first inclined surface;

[0012] The retraction drive mechanism includes a rotating sleeve, a rope pulley, a rope retractor and a driving rope;

[0013] The rotating sleeve is arranged at the lower end of the lock shaft, and the upper end of the rotating sleeve is provided with a second inclined surface that matches the first inclined surface;

[0014] The rope pulley is arranged on the rotating sleeve;

[0015] The rope retractor is provided on the body of the concrete pump truck, and is used to retract and release the driving rope;

[0016] One end of the driving rope is wound around the rope pulley and connected to the rope pulley, and the other end of the driving rope is connected to the rope retractor.

[0017] Furthermore, the rope retractor is configured as an electric pull rod, and the other end of the driving rope is connected to the telescopic end of the electric pull rod.

[0018] Furthermore, the device further comprises a controller, wherein the controller signal is connected to the rope retractor to control the rope retractor to perform the rope retracting and releasing action.

[0019] Furthermore, the driving rope is configured as a steel wire rope.

[0020] Furthermore, the inner end surface of the lock tongue is set as an inclined surface, and the outer end surface of the lock tongue is set as a flat surface.

[0021] Furthermore, the elastic member is configured as a spring.

[0022] A concrete pump truck is provided with the above-mentioned automatic locking device for concrete pump truck legs.

[0023] The beneficial effects of the utility model are as follows:

[0024] The utility model provides an automatic locking device for the outriggers of a concrete pump truck, which is applied to a concrete pump truck. Before concrete is pumped in construction, a retraction drive mechanism is actuated to drive a lock shaft to retract relative to a lock body, disengaging the lock shaft from the moving path of a lock tongue. The inner outrigger is then driven by the outrigger drive mechanism to extend relative to the outer outrigger. The retraction drive mechanism can be triggered automatically by a controller, and the synchronous action of the retraction drive mechanism can be achieved for multiple outriggers, eliminating the need for an operator to manually operate each outrigger one by one, thereby greatly improving operating efficiency. When the outriggers need to be retracted before the pump truck travels, the outrigger drive mechanism drives the inner outrigger to retract relative to the outer outrigger. The lock tongue on the inner outrigger squeezes the lock shaft with an external force, pushing the lock shaft to retract relative to the lock body. After the inner outrigger is retracted relative to the outer outrigger, the lock shaft extends relative to the lock body under the elastic force of an elastic member to block the lock tongue, thereby preventing the inner outrigger from extending relative to the outer outrigger. The above-mentioned outrigger extension and retraction process and the cooperation between the lock shaft and the lock tongue achieve automatic locking and unlocking of the outriggers, reduce safety hazards of the outriggers, and further improve the operating efficiency of the concrete pump truck. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 This is a schematic diagram of the structure of the automatic locking device for the outriggers of a concrete pump truck according to the present invention;

[0026] Figure 2 This is a front view of the lock body, lock shaft and retraction drive mechanism of the utility model;

[0027] Figure 3 for Figure 2 Middle AA section view;

[0028] Figure 4 This is a left side view of the lock body, lock shaft and retraction drive mechanism of the utility model;

[0029] Figure 5 This is a bottom view of the lock body, lock shaft and retraction drive mechanism of the utility model;

[0030] Figure 6 This is a cross-sectional view of the lock body, lock shaft and retraction drive mechanism of the utility model along the axial direction;

[0031] Reference numerals:

[0032] 1. Outer leg, 2. Inner leg, 21. Lock tongue, 3. Lock body, 4. Lock shaft, 41. Flat key, 42. Spring assembly set, 5. Elastic part, 61. Rotating sleeve, 62. Pulley, 63. Drive rope, 631. Bolt. DETAILED DESCRIPTION

[0033] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0034] In this utility model, unless otherwise specified or limited, the terms "connection" and "fixation" should be understood in a broad sense. For example, "fixation" can mean fixed connection, detachable connection, or integration; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; internal communication between two elements or interaction between two elements, unless otherwise specified. For those skilled in the art, the specific meanings of the above terms in this utility model can be understood according to specific circumstances.

[0035] Combine Figures 1 to 6 As shown, the utility model proposes an automatic locking device for a concrete pump truck support leg, comprising an outer support leg 1, an inner support leg 2, a lock body 3, a lock shaft 4 and a retraction drive mechanism.

[0036] The outer leg 1 is provided on the body of the concrete pump truck and is arranged in the horizontal direction. The inner leg 2 is located inside the outer leg 1, and the inner leg 2 slides with the outer leg 1. A leg driving mechanism is provided between the inner leg 2 and the outer leg 1. Driven by the leg driving mechanism, the inner leg 2 can extend and retract relative to the outer leg 1. The side wall of the inner leg 2 is provided with a locking tongue 21 to cooperate with the lock shaft 4. The inner end surface of the locking tongue 21 is set as an inclined surface, and the outer end surface of the locking tongue 21 is set as a plane. When the inner leg 2 retracts relative to the outer leg 1, the inner end surface of the locking tongue 21 squeezes the lock shaft 4, pushing the lock shaft 4 to retract relative to the lock body 3. During non-construction pumping concrete construction, when the inner leg 2 tends to extend relative to the outer leg 1, the outer end surface of the locking tongue 21 abuts against the lock shaft 4, and the lock shaft 4 blocks the locking tongue 21.

[0037] The lock body 3 is assembled to the outer wall of the outer leg 1 via a flange at its front end. The lock body 3 is located outside the outer leg 1. A lock shaft 4 is located inside the lock body 3. The lock shaft 4 slidably engages the lock body 3, allowing the lock shaft 4 to extend and retract relative to the lock body 3. An elastic member 5 is connected between the lock shaft 4 and the lock body 3. The elastic member 5 is specifically configured as a spring. The lock shaft 4 is connected to a spring assembly sleeve 42 via a flat key 41. The outer wall of the spring assembly sleeve 42 defines a first assembly groove, and the inner wall of the lock body 3 defines a second assembly groove. The ends of the spring assembly sleeve are respectively connected to the first and second assembly grooves.

[0038] Under the elastic force of the elastic member 5, the lock shaft 4 extends relative to the lock body 3. After extending relative to the lock body 3, the lock shaft 4 is located in the movement path of the lock tongue 21. An external force can push the lock shaft 4 back relative to the lock body 3, while simultaneously overcoming the elastic force of the elastic member 5. After retracting relative to the lock body 3, the lock shaft 4 is out of the movement path of the lock tongue 21. It should be noted that the external force here refers to the force exerted by the lock tongue 21 on the inner leg 2 to compress the lock shaft 4.

[0039] The retraction drive mechanism operates to drive the lock shaft 4 to retract relative to the lock body 3.

[0040] The lower end of the lock body 3 is provided with a first inclined surface; the retraction drive mechanism includes a rotating sleeve 61, a rope pulley 62, a rope retractor, and a driving rope 63. The rotating sleeve 61 is provided at the lower end of the lock shaft 4, and the upper end of the rotating sleeve 61 is provided with a second inclined surface that matches the first inclined surface, and the lower end of the rotating sleeve 61 is provided with a rope pulley 62.

[0041] The rope retractor is mounted on the concrete pump truck and is used to retract and release the drive rope 63, which is a steel wire rope. One end of the drive rope 63 is wrapped around a sheave 62 and fixed to the sheave 62 via a bolt 631. The other end of the drive rope 63 is connected to the rope retractor. The rope retractor is configured as an electric pull rod, with the other end of the drive rope connected to the retractable end of the electric pull rod. A controller is connected to the rope retractor via a signal cable to control the rope retractor's rope retraction and release.

[0042] The controller triggers the retracting end of the electric pull rod to drive the drive rope 63 to retract, driving the rope pulley 62 to rotate forward, and then driving the rotating sleeve 61 to rotate forward relative to the lock body 3. The second inclined surface cooperates with the first inclined surface to retract the lock shaft 4 relative to the lock body 3. The controller triggers the extension of the electric pull rod to drive the drive rope 63 to release, and under the elastic force of the elastic member 5, the lock shaft 4 extends relative to the lock body 3.

[0043] The utility model provides a concrete pump truck. The concrete pump truck is provided with the above-mentioned automatic locking device for the concrete pump truck outriggers.

[0044] So far, the present embodiment has been described in detail in conjunction with the accompanying drawings. Based on the above description, those skilled in the art should have a clear understanding of the automatic locking device for the concrete pump truck legs and the concrete pump truck of the present invention. The automatic locking device for the concrete pump truck legs described in the present invention is applied to a concrete pump truck. Before the construction of pumping concrete, the lock shaft 4 is retracted relative to the lock body 3 through the action of the retraction drive mechanism, and the lock shaft 4 is disengaged from the moving path of the lock tongue 21. Driven by the leg drive mechanism, the inner leg 2 extends relative to the outer leg 1; and the controller can trigger the automatic action of the retraction drive mechanism, and can achieve synchronous action of multiple legs corresponding to the retraction drive mechanism, without the need for operators to manually operate one by one, which greatly improves the working efficiency; before the pump truck travels, the legs need to be retracted. During retraction, the inner leg 2 retracts relative to the outer leg 1 under the drive of the leg driving mechanism, and the external force of the lock tongue 21 on the inner leg 2 squeezes the lock shaft 4, pushing the lock shaft 4 to retract relative to the lock body 3. After the inner leg 2 retracts relative to the outer leg 1, under the elastic force of the elastic member 5, the lock shaft 4 extends relative to the lock body 3 to block the lock tongue 21, thereby preventing the inner leg 2 from extending relative to the outer leg 1; the above-mentioned extension and retraction process of the legs and the cooperation between the lock shaft 4 and the lock tongue 21 realize the automatic locking and unlocking of the legs, reduce the safety hazards of the legs, and further improve the operating efficiency of the concrete pump truck.

[0045] Of course, the above description is only a preferred embodiment of the present invention and does not limit the patent scope of the present invention. All equivalent structural transformations made by using the contents of the present invention specification and drawings under the utility model concept, or direct / indirect application in other related technical fields are included in the patent protection scope of the present invention and should be protected by the present invention.

Claims

1. An automatic locking device for a concrete pump truck leg, characterized in that: include: External outriggers, installed on the concrete pump truck body; An inner leg is located inside the outer leg and can be extended and retracted relative to the outer leg, and a locking tongue is provided on the side wall of the inner leg; A lock body is provided on the outer leg; The lock shaft can be extended and retracted relative to the lock body, and an elastic member is connected to the lock body; under the elastic force of the elastic member, the lock shaft extends relative to the lock body; after the lock shaft extends relative to the lock body, the lock shaft is located in the movement path of the lock tongue; an external force can push the lock shaft to retract relative to the lock body, while overcoming the elastic force of the elastic member; after the lock shaft retracts relative to the lock body, the lock shaft is out of the movement path of the lock tongue; The retraction drive mechanism operates to drive the lock shaft to retract relative to the lock body.

2. The automatic locking device for the concrete pump truck legs according to claim 1, characterized in that: The lower end of the lock body is provided with a first inclined surface; The retraction drive mechanism includes a rotating sleeve, a rope pulley, a rope retractor and a driving rope; The rotating sleeve is arranged at the lower end of the lock shaft, and the upper end of the rotating sleeve is provided with a second inclined surface that matches the first inclined surface; The rope pulley is arranged on the rotating sleeve; The rope retractor is provided on the body of the concrete pump truck, and is used to retract and release the driving rope; One end of the driving rope is wound around the rope pulley and connected to the rope pulley, and the other end of the driving rope is connected to the rope retractor.

3. The automatic locking device for the concrete pump truck legs according to claim 2, characterized in that: The rope retractor is configured as an electric pull rod, and the other end of the driving rope is connected to the telescopic end of the electric pull rod.

4. The automatic locking device for the concrete pump truck legs according to claim 2, characterized in that: The device further comprises a controller, wherein the controller signal is connected to the rope retractor to control the rope retractor to perform the rope retracting and releasing action.

5. The automatic locking device for the concrete pump truck legs according to claim 2, characterized in that: The driving rope is configured as a steel wire rope.

6. The automatic locking device for the support legs of a concrete pump truck according to any one of claims 1 to 5, characterized in that: The inner end surface of the lock tongue is set as an inclined surface, and the outer end surface of the lock tongue is set as a flat surface.

7. The automatic locking device for the support legs of a concrete pump truck according to any one of claims 1 to 5, characterized in that: The elastic member is configured as a spring.

8. A concrete pump truck, characterized in that: The concrete pump truck is provided with the automatic locking device for the concrete pump truck legs according to any one of claims 1 to 7.

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