A power device for automatically adjusting the step distance of a steel bar truss

Abstract

The present invention discloses a power device for automatically adjusting the step distance of a steel bar truss, which includes a motor reducer, a frame, a step distance adjusting component, a connecting rod, a feeding platform and a limiting mechanism; the motor reducer is correspondingly installed on the frame, and its output shaft penetrates through the frame and is rotationally matched with the frame. The step distance adjusting component is correspondingly installed on the side of the frame away from the motor reducer, and includes a ratchet wheel and an eccentric bushing sleeved on the output shaft of the motor reducer in sequence from inside to outside. A ratchet pawl disc is sleeved on the eccentric bushing, and the pawls on the ratchet pawl disc are engaged with the ratchet wheel. Both ends of the connecting rod are respectively hinged to the ratchet pawl disc and the feeding platform. The limiting mechanism is installed on the frame and is used to keep the ratchet pawl disc in a braking state during the step distance adjustment stage. The present invention realizes the operation of the ratchet pawl disc at different rotational radii, and can automatically adjust the step distance of the steel bar truss without equipping additional mechanisms while realizing fixed-step reciprocating feeding, which not only saves costs, but also has the characteristics of simplicity and easy operation.

Description

Technical Field

[0001] The present invention relates to the technical field of steel bar truss processing, and particularly relates to a power device for automatically adjusting the step distance of a steel bar truss. Background Art

[0002] With the rapid development of the construction industry, steel bar trusses are widely used in large-scale engineering construction fields such as bridge tunnels, railways, highways, and PC factories due to their economic, convenient, safe, and reliable characteristics. The function of the step distance adjustment device of the steel bar truss production line is to change the node spacing of the finished steel bar truss by adjusting the feeding distance of the steel bars to meet the needs of customers and the construction site. At present, most of the step distance adjustment devices of steel bar trusses adopt multiple sets of connecting rod mechanisms and are also equipped with driving devices (such as oil cylinders, motors, etc.) separately. This method has a complex structure, poor stability, and high cost, and can no longer meet the market requirements for the step distance adjustment device with a simple structure, easy operation, high stability, and low cost. Summary of the Invention

[0003] The purpose of the present invention is to propose a power device for automatically adjusting the step distance of a steel bar truss to solve the technical problems described in the background art.

[0004] To achieve the above technical purpose, the present invention adopts the following technical solutions:

[0005] A power device for automatically adjusting the step distance of a steel bar truss includes a motor reducer, a frame, a step distance adjustment component, a connecting rod, a feeding platform, and a limiting mechanism; the motor reducer is correspondingly installed on the frame, and its output shaft penetrates through the frame and is rotationally matched with the frame. The step distance adjustment component is correspondingly installed on the side of the frame away from the motor reducer, and includes a ratchet wheel and an eccentric bushing sleeved on the output shaft of the motor reducer in sequence from inside to outside. A ratchet pawl disc is sleeved on the eccentric bushing. On the inner disc body of the ratchet pawl disc, there are a pawl shaft, a pawl, a spring, and a spring shaft, and on the outer disc body of the ratchet pawl disc, there is a disc shaft. The pawl shaft, the spring shaft, and the disc shaft are all fixed on the ratchet pawl disc. The pawl is hinged on the pawl shaft, one end of which is connected to the spring shaft through a spring, and the other end is engaged with the ratchet wheel. One end of the connecting rod is hinged on the disc shaft, and the other end is hinged to the feeding platform. The limiting mechanism is installed on the frame and is used to keep the ratchet pawl disc in a braking state during the step distance adjustment stage.

[0006] Preferably, a copper bushing is provided between the eccentric bushing and the ratchet pawl disc.

[0007] Preferably, the limiting mechanism includes a telescopic power device, a telescopic rod, and a brake plate. The telescopic power device is fixedly installed on the frame through a mounting seat. Several telescopic rods are arranged inside the telescopic power device, and the telescopic rods can extend and retract under the drive of the telescopic power device. A brake plate is fixed to the ends of several telescopic rods. When the brake plate is away from the ratchet wheel disc, the ratchet wheel disc is in a free state. When the brake plate touches the ratchet wheel disc, the ratchet wheel disc is in a braking state.

[0008] Preferably, a buffer pad is fixedly arranged at one end of the brake plate away from the telescopic power device.

[0009] Preferably, measures are taken to increase the friction between the ratchet and the ratchet wheel disc.

[0010] Preferably, an embedding groove is formed on the ratchet, and a friction plate is fixedly embedded in the embedding groove.

[0011] Compared with the prior art, the beneficial effects of the present invention are as follows: By the forward and reverse rotation of the same set of motor speed reducers in cooperation with the telescoping of the limiting mechanism, the ratchet wheel disc can work at different rotational radii. While realizing the function of fixed-step reciprocating feeding, the automatic adjustment function of the step distance of the steel bar truss can be realized without additional mechanisms. The device not only saves costs but also has the characteristics of simple structure, easy operation, fast adjustment speed, and high stability. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Through the following detailed description in conjunction with the accompanying drawings, the above and / or other aspects and advantages of the present invention will become clearer and easier to understand. These drawings are only schematic and do not limit the present invention, where:

[0013] Figure 1 is a three-dimensional structure schematic diagram of the present invention from a certain perspective;

[0014] Figure 2 is a three-dimensional structure schematic diagram of the present invention from another perspective;

[0015] Figure 3 is a three-dimensional exploded structure schematic diagram of the disassembled state of the present invention after removing the frame;

[0016] Figure 4 is a three-dimensional structure schematic diagram of the ratchet wheel disc of the present invention;

[0017] Figure 5 is a top view structure schematic diagram of the present invention;

[0018] Figure 6 is a front view structure schematic diagram of the present invention.

[0019] Reference numerals: 1, motor speed reducer; 2, frame; 3, step adjustment assembly; 31, ratchet wheel; 32, eccentric bushing; 33, bronze bushing; 34, slot; 35, friction plate; 36, ratchet pawl wheel; 37, ratchet pawl shaft; 38, ratchet pawl; 39, spring; 310, spring shaft; 311, wheel disc shaft; 4, connecting rod; 5, feeding platform; 6, limiting mechanism; 61, mounting seat; 62, telescopic power device; 63, telescopic rod; 64, brake plate; 65, buffer pad. Detailed implementation manners

[0020] In the following, embodiments of a power device for automatically adjusting the step distance of a steel bar truss of the present invention will be described with reference to the accompanying drawings. The embodiments described herein are specific specific implementation manners of the present invention, which are used to illustrate the concept of the present invention, and are all explanatory and exemplary, and should not be construed as limiting the implementation manners and the scope of the present invention. Except for the embodiments described herein, those skilled in the art can also adopt other obvious technical solutions based on the content disclosed in the claims and the specification of the present application. These technical solutions include technical solutions that make any obvious substitutions and modifications to the embodiments described herein.

[0021] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "front", "rear", "left", "right", "top", "bottom", "upper", "lower", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings. It is only for the convenience of describing the present invention 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, and therefore should not be construed as limiting the present invention.

[0022] The drawings in this specification are schematic diagrams, which assist in illustrating the concept of the present invention, and schematically show the shapes of various parts and their mutual relationships. Please note that in order to clearly show the structures of the components in the embodiments of the present invention, the drawings are not drawn in the same proportion. The same reference numerals are used to represent the same parts.

[0023] The principles and features of the present invention will be described below with reference to the accompanying drawings. The embodiments cited are only used to explain the present invention and are not used to limit the scope of the present invention. The following combination Figure 1-6 , a further detailed description of the preferred embodiments of the present invention will be given:

[0024] As Figure 1-6 shown, a preferred power device for automatically adjusting the step distance of a steel bar truss of the present invention includes a motor speed reducer 1, a frame 2, a step adjustment assembly 3, a connecting rod 4, a feeding platform 5, and a limiting mechanism 6;

[0025] The motor speed reducer 1 is correspondingly installed on the frame 2, and its output shaft penetrates through the frame 2 and is rotationally matched with the frame 2. The step adjustment assembly 3 is correspondingly installed on the side of the frame 2 away from the motor speed reducer 1, and includes a ratchet wheel 31 and an eccentric bushing 32 that are sleeved on the output shaft of the motor speed reducer 1 in sequence from inside to outside. Through holes in the middle of the ratchet wheel 31 and the eccentric bushing 32 are both processed with a through long keyway adapted to the key installed on the output shaft of the motor speed reducer 1 to effectively transmit torque. A ratchet pawl disc 36 is sleeved on the eccentric bushing 32. On the inner disc body of the ratchet pawl disc 36, there are provided a ratchet pawl shaft 37, a ratchet pawl 38, a spring 39, and a spring shaft 310, and on the outer disc body of the ratchet pawl disc 36, there is provided a disc shaft 311. The ratchet pawl shaft 37, the spring shaft 310, and the disc shaft 311 are all fixed on the ratchet pawl disc 36. The ratchet pawl 38 is hinged on the ratchet pawl shaft 37, one end of which is connected to the spring shaft 310 through the spring 39, and the other end is meshed with the ratchet wheel 31. One end of the connecting rod 4 is hinged on the disc shaft 311, and the other end is hinged and connected to the feeding platform 5;

[0026] The limiting mechanism 6 is installed on the frame 2 and is located on one side of the step adjustment assembly 3, and is used to make the ratchet pawl disc 36 in a braking state during the step adjustment stage. The limiting mechanism 6 includes a telescopic power device 62, a telescopic rod 63, and a braking plate 64, and the limiting mechanism 6 includes, but is not limited to, pneumatic control, hydraulic control, and mechanical control and other methods. The telescopic power device 62 is fixedly installed on the frame 2 through a mounting seat 61. A plurality of telescopic rods 63 are arranged inside the telescopic power device 62, and the telescopic rods 63 can perform extension and retraction actions under the drive of the telescopic power device 62. A braking plate 64 is fixed at the ends of the plurality of telescopic rods 63. When the braking plate 64 is away from the ratchet pawl disc 36, the ratchet pawl disc 36 is in a free state. When the braking plate 64 abuts against the ratchet pawl disc 36, the ratchet pawl disc 36 is in a braking state. To avoid hard contact between components, buffer pads 65 are fixedly provided at the ends of the braking plate 64 away from the telescopic power device 62 through bolts;

[0027] When a fixed-step feeding movement needs to be performed, the telescopic rod 63 of the limiting mechanism 6 is in a retracted state, that is, the braking plate 64 is away from the ratchet pawl disc 36, and the ratchet pawl disc 36 is in a free state. At this time, the motor speed reducer 1 rotates counterclockwise, driving the ratchet wheel 31 to rotate counterclockwise. Since the ratchet wheel 31 and the ratchet pawl 38 are in a meshed state at this time, the ratchet wheel 31 drives the ratchet pawl disc 36 to rotate counterclockwise through the ratchet pawl 38. At this time, the distance between the disc shaft 311 and the output shaft of the motor speed reducer 1 does not change, that is, the rotation radius of the ratchet pawl disc 36 remains unchanged. The ratchet pawl disc 36 drives the feeding platform 5 to perform a fixed-step reciprocating horizontal movement through the connecting rod 4;

[0028] When the step distance needs to be adjusted, the telescopic power device 62 of the limit mechanism 6 drives the telescopic rod 63 to extend until the buffer pad 65 at the front end of the brake plate 64 is in close contact with the ratchet wheel disc 36, restricting the rotation of the ratchet wheel disc 36. At this time, the motor reducer 1 rotates clockwise, and the ratchet 31 and the eccentric bushing 32 are simultaneously driven to rotate clockwise. Since the ratchet wheel disc 36 is restricted from rotating by the limit mechanism 6 at this time, the meshing position between the ratchet 31 and the pawl 38 changes, and the clockwise rotation of the eccentric bushing 32 causes the distance between the wheel disc shaft 311 and the output shaft of the motor reducer 1 to change, that is, the radius of gyration of the ratchet wheel disc 36 changes, and finally the feeding distance of the feeding platform 5 changes, achieving the purpose of step distance adjustment;

[0029] As Figure 3 shown, in order to reduce the wear between the eccentric bushing 32 and the ratchet wheel disc 36, a copper sleeve 33 is inlaid and fixed at the central through hole of the ratchet wheel disc 36, that is, a copper sleeve 33 is provided between the ratchet wheel disc 36 and the eccentric bushing 32 to avoid direct contact between the two, reducing wear;

[0030] The contact surface between the ratchet 31 and the ratchet wheel disc 36 can be increased by adding materials or surface treatment (increasing the roughness of the contact surface) and other methods to increase the friction between the two, so as to ensure that at the moment when the fixed-step movement stops, the ratchet wheel disc 36 does not rotate relative to the ratchet 31 or "skip teeth" due to inertia, ultimately resulting in inaccurate feeding distance. Among them, the preferred method is to provide a groove 34 on the ratchet 31 and fixedly install a friction plate 35 in the groove 34;

[0031] Since each ratchet tooth of the ratchet 31 can correspond to the corresponding step distance during design, therefore, the present invention can basically cover the truss node spacings required by most current construction sites.

[0032] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A power device for automatically adjusting the step distance of a steel bar truss, characterized in that: It includes a motor reducer (1), a frame (2), a step adjustment component (3), a connecting rod (4), a feeding platform (5) and a limiting mechanism (6); the motor reducer (1) is correspondingly installed on the frame (2), and its output shaft penetrates through the frame (2) and is rotationally matched with the frame (2). The step adjustment component (3) is correspondingly installed on the side of the frame (2) away from the motor reducer (1), and includes a ratchet wheel (31) and an eccentric bushing (32) sleeved on the output shaft of the motor reducer (1) in sequence from inside to outside. A ratchet pawl disc (36) is sleeved on the eccentric bushing (32). A ratchet pawl shaft (37), a ratchet pawl (38), a spring (39), and a spring shaft (310) are arranged on the inner disc body of the ratchet pawl disc (36). A disc shaft (311) is arranged on the outer disc body of the ratchet pawl disc (36). The ratchet pawl shaft (37), the spring shaft (310), and the disc shaft (311) are all fixed on the ratchet pawl disc (36). The ratchet pawl (38) is hinged on the ratchet pawl shaft (37), one end of which is connected to the spring shaft (310) through the spring (39), and the other end is meshed with the ratchet wheel (31). One end of the connecting rod (4) is hinged on the disc shaft (311), and the other end is hinged to the feeding platform (5). The limiting mechanism (6) is installed on the frame (2) and is used to make the ratchet pawl disc (36) in a braking state during the step adjustment stage; The limiting mechanism (6) includes a telescopic power device (62), a telescopic rod (63), and a braking plate (64). The telescopic power device (62) is fixedly installed on the frame (2) through a mounting seat (61). A plurality of telescopic rods (63) are arranged inside the telescopic power device (62), and the telescopic rods (63) can be extended and retracted under the drive of the telescopic power device (62). A braking plate (64) is fixed at the ends of the plurality of telescopic rods (63). When the braking plate (64) is away from the ratchet pawl disc (36), the ratchet pawl disc (36) is in a free state. When the braking plate (64) touches the ratchet pawl disc (36), the ratchet pawl disc (36) is in a braking state.

2. The power device for automatically adjusting the step distance of a steel bar truss according to claim 1, characterized in that: A copper bushing (33) is arranged between the eccentric bushing (32) and the ratchet pawl disc (36).

3. The power device for automatically adjusting the step distance of a steel bar truss according to claim 1, characterized in that: A buffer pad (65) is fixedly arranged at the end of the braking plate (64) away from the telescopic power device (62).

4. A power device for automatically adjusting the step distance of a steel bar truss according to claim 1, characterized in that: Measures are taken to increase the friction between the ratchet wheel (31) and the ratchet pawl disc (36).

5. The power device for automatically adjusting the step distance of a steel bar truss according to claim 4, characterized in that: A groove (34) is formed on the ratchet wheel (31), and a friction plate (35) is fixedly arranged in the groove (34).

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