A telescopic outrigger drive system and a concrete pump truck

Abstract

This utility model relates to a leg extension drive system, comprising a base, a first-stage leg, and a second-stage leg. The first-stage leg is driven to extend and retract by a first-stage leg extension drive system, and the second-stage leg is driven to extend and retract by a second-stage leg extension drive system. The first-stage leg extension drive system includes a sprocket and a sprocket motor fixedly mounted on the base, and a connecting seat fixedly mounted on the first-stage leg. A chain drive is provided between the sprocket and the sprocket motor, and the connecting seat is fixedly connected to the chain. The second-stage leg extension drive system includes a single-stage hydraulic cylinder disposed inside the housings of the first and second-stage legs and hinged to connect the two legs, and a motion hose supplying oil to the single-stage hydraulic cylinder. The leg extension drive system and the motion hose are respectively disposed in the gaps on both sides of the housing of the first-stage leg, without interfering with each other. This utility model has a simple structure and is lightweight, enabling lightweight modification of concrete pump trucks.

Description

Technical Field

[0001] This utility model relates to a telescopic outrigger drive system and a concrete pump truck, belonging to the field of engineering machinery technology. Background Technology

[0002] Construction machinery such as concrete pump trucks are typically equipped with telescopic outriggers. During operation, the outriggers must be fully extended to prevent the machinery from tipping over. Currently, telescopic outriggers are generally composed of two or more interlocking outriggers. The first-stage outrigger is installed inside the base and slides along a track within the base's outrigger housing. The second-stage outrigger is installed inside the first-stage outrigger housing and slides along the same track. Traditional two-stage telescopic outriggers are driven by bidirectional hydraulic cylinders. Because these cylinders have a long stroke, they occupy a large space and are heavy. Furthermore, the large cross-sectional dimensions of the base's outrigger housing contribute to the overall weight of the base and outrigger housing, hindering the overall lightweight design of the concrete pump truck.

[0003] Therefore, there is an urgent need for a simple and lightweight outrigger extension drive system and concrete pump truck to achieve the overall lightweight upgrade of the concrete pump truck. Summary of the Invention

[0004] The purpose of this utility model is to overcome the above-mentioned shortcomings and provide a simple and lightweight outrigger telescopic drive system and concrete pump truck, so as to achieve the overall lightweight upgrade of the concrete pump truck.

[0005] The purpose of this utility model is achieved as follows: A support leg telescopic drive system includes a base, a first-stage support leg telescopically slidably disposed inside the base, and a second-stage support leg telescopically slidably disposed inside the first-stage support leg. The first-stage support leg is driven to telescopically extend and retract by a first-stage support leg telescopic drive system, and the second-stage support leg is driven to telescopically extend and retract by a second-stage support leg telescopic drive system. The primary outrigger telescopic drive system includes a sprocket and a sprocket motor fixed on the base, and a connecting seat fixed on the primary outrigger. A chain drive is provided between the sprocket and the sprocket motor, and the connecting seat is fixed to the chain. The secondary outrigger telescopic drive system includes a single-stage hydraulic cylinder installed inside the housing of the first-stage outrigger and the second-stage outrigger and hinged to connect the two outriggers, and a motion hose for supplying oil to the single-stage hydraulic cylinder. The outrigger telescopic drive system and the motion hose are respectively located in the gaps on both sides of the first-stage outrigger housing, and do not affect each other.

[0006] Furthermore, the motion hose includes hose A and hose B, which are respectively connected to the base and the first-stage support leg at both ends, and hose C, which is respectively connected to the first-stage support leg and the second-stage support leg at both ends; hose A is supplied with oil by a single-stage hydraulic cylinder; hose B and hose C are supplied with oil by a vertical hydraulic cylinder located on the vertical part of the second-stage support leg.

[0007] Furthermore, one end of the hose A is connected to the single-stage cylinder via a bridge connector A fixed on the first-stage support leg, and the other end is connected to the rigid pipe A fixed on the base; the rigid pipe A is connected to the hydraulic system via a transition block A.

[0008] Furthermore, the rigid tube A is fixed by a fixing clamp A that is fixed on the base.

[0009] Furthermore, one end of the hose B is connected to the hydraulic system via a bridge connector B, and the other end is connected to the rigid pipe B fixed on the first-stage outrigger; the rigid pipe B is connected to the hose C via a transition block B; the hose C is connected to the vertical cylinder pipeline of the vertical section of the second-stage outrigger via a transition connector C.

[0010] Furthermore, the rigid pipe B is fixed by a fixing clamp B that is fixed on the first-stage support leg.

[0011] Furthermore, a long strip-shaped protective plate is provided on the base to protect hose A and hose B.

[0012] Furthermore, a rope reel is fixedly mounted on the base and the first-stage support leg, the hose A is installed in the rope reel of the first-stage support leg, and the hose B is installed in the rope reel of the base.

[0013] Furthermore, the first-stage support leg and the second-stage support leg are respectively fixedly mounted with fixed seat A and fixed seat B, and the cylinder body and piston rod of the single-stage hydraulic cylinder are respectively hinged to fixed seat A and fixed seat B through pins.

[0014] A concrete pump truck, wherein the base of the pump truck is equipped with any of the aforementioned outrigger telescopic drive systems.

[0015] Compared with the prior art, the beneficial effects of this utility model are: This utility model discloses a leg extension drive system. The first-stage extension drive system uses a sprocket transmission structure to drive the extension and retraction of the first-stage leg, while the second-stage extension drive system uses a flexible hose system and a single-stage hydraulic cylinder to drive the extension and retraction of the second-stage leg. The two drive systems are respectively installed in the gaps on both sides of the leg, making full use of the slide space. The structure is compact and does not interfere with each other, resulting in a significant weight reduction compared to a two-stage bidirectional hydraulic cylinder. Because the drive system is placed on the outside of the leg, only one single-stage hydraulic cylinder needs to be accommodated inside the leg. Therefore, the height of the first-stage leg can be further reduced, and the cross-sectional area of ​​the housing can be decreased, thereby reducing the weight of the first-stage leg. When the height of the first-stage leg is reduced, the size of the base housing that cooperates with the first-stage leg can also be further reduced, thus reducing the weight of the base. The concrete pump truck of this utility model has the outrigger telescopic drive system installed on the base, which can further reduce the height of the base and the first-stage outrigger, reduce the cross-sectional area, and reduce the weight. The weight of the pump truck base is reduced, which is conducive to the overall lightweighting of the concrete pump truck. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of a leg extension drive system according to the present invention.

[0017] Figure 2 This is a schematic diagram of the structure of a primary outrigger extension drive system according to the present invention.

[0018] Figure 3 This is a schematic diagram of the structure of a two-stage outrigger telescopic drive system according to the present invention.

[0019] Figure 4 This is a schematic diagram of the flexible hose C structure of a leg extension drive system according to this utility model.

[0020] Figure 5 This is a schematic diagram of the single-stage hydraulic cylinder installation structure of a leg extension drive system according to this utility model.

[0021] Figure 6 This is a side view of the first-stage outrigger extending from the chain of a leg extension drive system according to this utility model.

[0022] Figure 7 This is a side view of the first-stage outrigger extending out of the motion hose of an outrigger extension drive system according to this utility model.

[0023] in: 1. Base; 2. First-stage support leg; 3. Second-stage support leg; 4. First-stage support leg telescopic drive system; 5. Second-stage support leg telescopic drive system. Fixed seat A21, fixed seat B31, sprocket 41, chain 42, sprocket motor 43, connecting seat 44, guard plate 45, rigid pipe B46, fixed pipe clamp B47, hose B48, bridge joint B49, hose A410, bridge joint A411, transition block A412, rigid pipe A413, fixed pipe clamp A414, single-stage cylinder 51, hose C52, transition joint C53, pin 54. Detailed Implementation Example 1

[0024] See Figures 1-7The present invention relates to a support leg telescopic drive system, comprising a base 1, a first-stage support leg 2 telescopically slidably disposed inside the base 1, and a second-stage support leg 3 telescopically slidably disposed inside the first-stage support leg 2; the first-stage support leg 2 is driven to telescopically extend and retract by a first-stage support leg telescopic drive system 4, and the second-stage support leg 3 is driven to telescopically extend and retract by a second-stage support leg telescopic drive system 5. The primary outrigger extension drive system 4 includes a sprocket 41 and a sprocket motor 43 fixedly mounted on the base 1, and a connecting seat 44 fixedly mounted on the primary outrigger 2. A chain 42 is provided between the sprocket 41 and the sprocket motor 43 for transmission, and the connecting seat 44 is fixedly connected to the chain 42. The hydraulic system drives the sprocket motor 43 to rotate, which drives the chain 42 to move. The connecting seat 44 on the chain 42 then drives the primary outrigger 2 to perform corresponding extension or retraction actions. The secondary outrigger telescopic drive system 5 includes a single-stage hydraulic cylinder 51 installed inside the housing of the first-stage outrigger 2 and the second-stage outrigger 3 and hinged to connect the two outriggers, and a motion hose for supplying oil to the single-stage hydraulic cylinder 51; the first-stage outrigger 2 and the second-stage outrigger 3 are respectively fixedly mounted with a fixed seat A21 and a fixed seat B31, and the cylinder body and piston rod of the single-stage hydraulic cylinder 51 are respectively hinged to the fixed seat A21 and the fixed seat B31 through a pin 54. The sports hose includes hoses A410 and B48, which are connected to the base 1 and the first-stage support leg 2 at both ends respectively, and hose C52, which is connected to the first-stage support leg 2 and the second-stage support leg 3 at both ends respectively. Hose A410 supplies oil to a single-stage hydraulic cylinder 51. Hose B48 and hose C52 supply oil to a vertical hydraulic cylinder located on the vertical part of the second-stage support leg 3. Each hose and rigid pipe is a twin-structure dual-circuit design. A long strip-shaped protective plate 45 is provided on the base 1 to protect hoses A410 and B48. Specifically, one end of the hose A410 is connected to the single-stage cylinder 51 via a bridge joint A411 fixed on the first-stage outrigger 2, and the other end is connected to a rigid pipe A413 fixed on the base 1. The rigid pipe A413 is connected to the hydraulic system via a transition block A412. The rigid pipe A413 is fixed by a fixing clamp A414 fixed on the base 1. Hydraulic oil from the pump truck's hydraulic system flows from the transition block A412 into the rigid pipe A413, then through the hose A410 and through the bridge joint A411 into the single-stage cylinder 51. The cylinder rod of the single-stage cylinder 51 drives the first-stage outrigger to extend and retract. When the first-stage outrigger 2 extends and retracts, the hose A410 serves as a connecting part for the relative movement of the pipeline system. One end of the hose B48 is connected to the hydraulic system via a bridge joint B49, and the other end is connected to a rigid pipe B46 fixed on the first-stage outrigger 2. The rigid pipe B46 is fixed by a fixing clamp B47 fixed on the first-stage outrigger 2. The rigid pipe B46 is connected to the hose C52 via a transition block B45. The hose C52 is connected to the vertical cylinder pipeline of the vertical section of the second-stage outrigger 3 via a transition joint C53. The hydraulic oil of the pump truck's hydraulic system enters the hose B48 through the bridge joint B49, then enters the rigid pipe B46, then enters the hose C52 through the transition block B45, and finally enters the vertical cylinder pipeline. When the first-stage outrigger 2 extends or retracts, the hose B48 serves as a connecting part for the relative movement of the pipeline system. When the second-stage outrigger 3 extends or retracts, the hose C52 serves as a connecting part for the relative movement of the pipeline system. The hoses B48 and A410 are located in the gap between the first-stage support leg 2 and the base 1, and the hose C52 is located in the gap between the first-stage support leg 2 and the second-stage support leg 3. The sprocket drive component of the support leg telescopic drive system 4 and the various pipes of the motion hose are respectively located in the gaps on both sides of the housing of the first-stage support leg 3, without affecting each other.

[0025] The outrigger extension drive system of this utility model has two systems: a first-stage outrigger extension drive system 4, which uses a sprocket transmission structure to drive the extension and retraction of the first-stage outrigger 2; and a second-stage outrigger extension drive system 5, which uses a motion hose system and a single-stage hydraulic cylinder 51 to drive the extension and retraction of the second-stage outrigger 3. The two systems are respectively set in the gaps on both sides of the outrigger, making full use of the slide space. The structure is compact and does not interfere with each other. Compared with a two-stage bidirectional hydraulic cylinder, the weight is significantly reduced. Since the drive system is placed on the outside of the outrigger, only a single-stage hydraulic cylinder 51 needs to be accommodated inside the outrigger. Therefore, the height of the first-stage outrigger 2 can be further reduced, and the cross-sectional area of ​​the housing can be reduced, thereby reducing the weight of the first-stage outrigger 2. When the height of the first-stage outrigger 2 is reduced, the size of the housing of the base 1 that cooperates with the first-stage outrigger 2 can also be further reduced, thereby reducing the weight of the base 1. Example 2

[0026] Based on the outrigger telescopic drive system of Embodiment 1, a rope reel is fixedly mounted on the base 1 and the first-stage outrigger 2 respectively. The flexible hose A410 is installed in the rope reel of the first-stage outrigger 2, and the flexible hose B48 is installed in the rope reel of the base 1. This eliminates the need for rigid pipes A413 and B46 and their corresponding fixing clamps. Due to the simple structure, no drawings are provided. The rope reel protects the flexible hoses and meets the movement and deformation requirements of flexible hoses A410 and B48 when the first-stage outrigger 2 telescopically extends or retracts. Example 3

[0027] See appendix Figure 1The present invention relates to a concrete pump truck, wherein the pump truck base is equipped with any of the outrigger telescopic drive systems in Embodiment 1 or Embodiment 2, which can further reduce the height of the base 1 and the first-stage outrigger 2, reduce the cross-sectional area, reduce the weight, and reduce the weight of the pump truck base, which is conducive to the overall lightweighting of the concrete pump truck.

[0028] Additionally, it should be noted that the above-described specific implementation is merely an optimized solution of this patent, and any modifications or improvements made by those skilled in the art based on the above concept are within the scope of protection of this patent.

Claims

1. A telescopic leg drive system, comprising a base (1), a first stage leg (2) telescopically slidingly arranged inside the base (1), a second stage leg (3) telescopically slidingly arranged inside the first stage leg (2), characterized in that: The first-stage support leg (2) is driven to extend and retract by the first-stage support leg extension and retraction drive system (4), and the second-stage support leg (3) is driven to extend and retract by the second-stage support leg extension and retraction drive system (5). The first-stage outrigger telescopic drive system (4) includes a sprocket (41) and a sprocket motor (43) fixed on the base (1), and a connecting seat (44) fixed on the first-stage outrigger (2). A chain (42) is provided between the sprocket (41) and the sprocket motor (43), and the connecting seat (44) is fixed to the chain (42). The secondary outrigger telescopic drive system (5) includes a single-stage hydraulic cylinder (51) installed inside the housing of the first-stage outrigger (2) and the second-stage outrigger (3) and hinged to connect the two outriggers, and a motion hose for supplying oil to the single-stage hydraulic cylinder (51). The outrigger extension drive system (4) and the motion hose are respectively located in the gaps on both sides of the first-stage outrigger (3) housing, and do not affect each other.

2. The outrigger telescopic drive system according to claim 1, characterized in that: The motion hose includes hose A (410) and hose B (48) which are connected to the base (1) and the first-stage support leg (2) at both ends respectively, and hose C (52) which is connected to the first-stage support leg (2) and the second-stage support leg (3) at both ends respectively; hose A (410) supplies oil to the single-stage hydraulic cylinder (51); hose B (48) and hose C (52) supply oil to the vertical hydraulic cylinder located on the vertical part of the second-stage support leg (3).

3. The outrigger telescopic drive system according to claim 2, characterized in that: One end of the hose A (410) is connected to the single-stage cylinder (51) via a bridge joint A (411) fixed on the first-stage support leg (2), and the other end is connected to the rigid pipe A (413) fixed on the base (1); the rigid pipe A (413) is connected to the hydraulic system via a transition block A (412).

4. The outrigger telescopic drive system according to claim 3, characterized in that: The rigid tube A (413) is fixed by a fixed tube clamp A (414) mounted on the base (1).

5. The outrigger telescopic drive system according to claim 2, characterized in that: One end of the hose B (48) is connected to the hydraulic system via a bridge connector B (49), and the other end is connected to the rigid pipe B (46) fixed on the first-stage outrigger (2); the rigid pipe B (46) is connected to the hose C (52) via a transition block B (45); the hose C (52) is connected to the vertical cylinder pipeline of the vertical part of the second-stage outrigger (3) via a transition connector C (53).

6. The outrigger telescopic drive system according to claim 5, characterized in that: The rigid pipe B (46) is fixed by a fixed pipe clamp B (47) mounted on the first-stage support leg (2).

7. The outrigger telescopic drive system according to claim 2, characterized in that: The base (1) is provided with a long strip-shaped guard plate (45) to protect the hose A (410) and hose B (48).

8. The outrigger telescopic drive system according to claim 2, characterized in that: A rope reel is fixed on the base (1) and the first-stage support leg (2), respectively. The hose A (410) is installed in the rope reel of the first-stage support leg (2), and the hose B (48) is installed in the rope reel of the base (1).

9. The outrigger telescopic drive system according to claim 1, characterized in that: The first-stage support leg (2) and the second-stage support leg (3) are respectively fixedly mounted with a fixed seat A (21) and a fixed seat B (31). The cylinder body and piston rod of the single-stage cylinder (51) are respectively hinged to the fixed seat A (21) and the fixed seat B (31) through a pin (54).

10. A concrete pump truck, characterized in that: The pump truck base is equipped with any one of the outrigger telescopic drive systems of claims 1 to 9.

Images