Hoop type loose limiting angle adjusting device

Abstract

The invention discloses a hoop type loose limiting angle adjusting device which comprises a main machine and a brake bar, the main machine drives the brake bar to swing up and down through a swing crank arm, a swing rod shaft is connected between the swing crank arm and the brake bar, and a loose limiting structure is arranged between the swing crank arm and the swing rod shaft or / and between the swing rod shaft and the brake bar. The two ends of the swing rod shaft are inserted into the shaft holes of the swing crank arm or the shaft holes in the brake bar respectively. The loose limiting structure comprises circumferential grooves and positioning protrusions, wherein the circumferential grooves are formed in the shaft hole and the swing rod shaft respectively, and the positioning protrusions can swing in the grooves in a limited mode. The brake bar has the advantages of being capable of adjusting the horizontal angle of the brake bar and safe to use.

Description

Technical Field

[0001] The invention relates to the field of mechanical transmission, and in particular to a hoop-type loose limiting angle adjustment device which can adjust the horizontal angle of a gate rod and is safe to use. Background Art

[0002] The length of the gate rod varies depending on the use environment (the longest is up to 8m). The gate rod is heavy and slender, and may bend and sag after installation. In addition, due to the influence of processing accuracy, the crank arm connecting rod mechanism is limited by the space of the outer chassis. The larger the length ratio of the gate rod to the swing crank arm, the greater the angle error will be. In actual installation, refer to Figure 1 To achieve a generally horizontal barrier lever 1a, the angle between the lever 1a and the swing arm 3a must be adjusted. A common solution involves a purely clamp-type (keyless) connection between the swing arm shaft 5a and the swing arm 3a. This approach has the disadvantages of a wide range of angle adjustment, lacking a basic reference angle between the lever 1a and the swing arm 3a during assembly, and requiring significant time and effort for installation and commissioning. Furthermore, the keyless clamp-type connection poses safety risks, and the purely clamp-type structure can easily loosen, causing the lever to fall to the ground. Summary of the Invention

[0003] In order to solve the above problems, the present invention aims to provide a hoop-type loose limit angle adjustment device that can adjust the horizontal angle of a gate rod and is safe to use.

[0004] The present invention is achieved through the following technical measures: a hoop-type loose limit angle adjustment device, including a main unit and a gate rod, the main unit drives the gate rod to swing up and down through a swinging crank arm, a rocker shaft is connected between the swinging crank arm and the gate rod, a loose limit structure is arranged between the swinging crank arm and the rocker shaft or / and between the rocker shaft and the gate rod, the two ends of the rocker shaft are respectively inserted into the axial hole of the swinging crank arm or the axial hole on the gate rod; the loose limit structure includes a circumferential groove and a positioning protrusion that can limit and swing in the groove on the axial hole and the rocker shaft.

[0005] As a preferred embodiment, the loose limiting structure includes a positioning key radially extending from the shaft hole of the swing crank arm and a corresponding limiting key slot arranged on the rocker shaft, and the width of the limiting key slot is greater than the thickness of the positioning key.

[0006] As a preferred embodiment, a positioning keyway is also provided in the shaft hole of the swing crank arm, wherein a part of the positioning key is adapted to be inserted into the positioning keyway, and the other part of the positioning key is movably provided in the limit keyway.

[0007] As a preferred embodiment, the loose limiting structure includes a positioning key radially extending from the axial hole on the gate rod and a corresponding limiting key groove arranged on the rocker shaft, and the width of the limiting key groove is greater than the thickness of the positioning key.

[0008] As a preferred embodiment, a positioning key slot is also provided in the shaft hole on the gate rod, and the positioning key slot is adapted to receive a portion of the positioning key, and the other portion of the positioning key is movably provided in the limit key slot.

[0009] As a preferred embodiment, the main engine drives the swing crank arm through a speed reduction mechanism to drive the gate rod to swing up and down.

[0010] As a preferred embodiment, the shaft hole of the swing crank arm or the shaft hole on the brake lever is clamped to the end of the swing arm shaft by a clamping screw.

[0011] As a preferred embodiment, the arc of the groove is less than 30 degrees.

[0012] As a preferred embodiment, the motor of the main engine drives the active crank arm to rotate through a reduction gearbox, and the active crank arm drives the swing crank arm to swing through a connecting rod. Since the present invention has a loose limiting structure between the swing crank arm and the rocker arm shaft or / and between the rocker arm shaft and the gate rod, when the gate rod forms a certain angle with the horizontal after falling, the angle can be corrected by rotating. Therefore, the angle between the gate rod and the horizontal can be adjusted while the positioning protrusion is limited in the groove. Therefore, when the connection between the swing crank arm and the rocker arm shaft or / and between the rocker arm shaft and the gate rod becomes loose and rotates, the rotatable angle of the gate rod is also limited to a relatively loose free space range, thereby ensuring the safety of product use and effectively preventing safety hazards caused by the gate rod falling. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 The present invention is an exploded schematic diagram of a gate rod and a swing crank arm of a background technology gate.

[0014] Figure 2 This is a structural schematic diagram of Example 1 of the present invention with the gate rod angle in the middle.

[0015] Figure 3 This is a schematic diagram of the structure of Example 1 of the present invention after the gate rod angle is adjusted downward.

[0016] Figure 4 This is a structural schematic diagram of Example 1 of the present invention after the gate rod angle is adjusted upward.

[0017] Figure 5 This is an exploded schematic diagram of the gate lever and the swing crank arm of Example 1 of the present invention.

[0018] Figure 6 Schematic diagram of the structure of the gate rod and the swing crank arm of Example 2 of the present invention.

[0019] Figure 7 This is an exploded schematic diagram of the brake lever and the swing crank arm of Example 3 of the present invention. DETAILED DESCRIPTION

[0020] The present invention will be further described in detail below with reference to the embodiments and accompanying drawings.

[0021] A hoop-type loose limit angle adjustment device of this embodiment, please refer to the attached Figures 2 to 7 , including a main unit and a gate rod 1, the main unit drives the gate rod 1 to swing up and down through a swing crank arm 3, a rocker shaft 5 is connected between the swing crank arm 3 and the gate rod 1, and a loose limiting structure is provided between the swing crank arm 3 and the rocker shaft 5 or / and between the rocker shaft 5 and the gate rod 1, and the two ends of the rocker shaft 5 are respectively inserted into the axis hole 301 of the swing crank arm 3 or the axis hole 201 of the handle 2 on the gate rod 1; the loose limiting structure includes a circumferential groove and a positioning protrusion that can limit and swing in the groove on the axis hole and the rocker shaft 5.

[0022] Since the adjustment device is provided with a loose limiting structure between the swing crank arm 3 and the rocker shaft 5 or / and between the rocker shaft 5 and the gate rod 1, when the gate rod 1 forms a certain angle with the horizontal after falling, the angle can be corrected by rotation. Therefore, the angle between the gate rod 1 and the horizontal can be adjusted while the positioning protrusion is limited in the groove. Therefore, when the connection between the swing crank arm 3 and the rocker shaft 5 or / and between the rocker shaft 5 and the gate rod 1 becomes loose and rotates, the rotatable angle of the gate rod 1 is also limited to a relatively loose free space range, thereby ensuring the safety of the product and effectively preventing the safety hazards caused by the gate rod 1 falling.

[0023] In the embodiment 1 of the hoop type loose limit angle adjustment device, please refer to Figure 5 In addition to the above technical solution, a loose limit structure can also be provided, comprising a positioning key 302 extending radially from the axial hole 301 of the swing crank arm 3 and a corresponding limit key slot 501 provided on the rocker shaft 5. The limit key slot 501 has a width greater than the thickness of the positioning key 302. The limit key slot 501 is larger than the positioning key 302, leaving a gap between them after assembly. This limits the adjustable range of the angle between the gate lever 1 and the swing crank arm 3. The positioning key 302 and the limit key slot 501 provide a rough angular reference during assembly, saving time and effort, thereby reducing the difficulty of processing and installation.

[0024] In Example 1 of the hoop-type loose limit angle adjustment device, for the convenience of processing, on the basis of the previous technical solution, the positioning key can also be movable, and a positioning key slot is also provided in the axial hole 301 of the swing crank arm 3 (not shown in the figure), and the positioning key slot is adapted to be snapped into a part of an independently movable positioning key, and the other part of the positioning key is movably provided in the limit key slot 501.

[0025] In the embodiment 1 of the hoop type loose limit angle adjustment device, please refer to Figures 2 to 5On the basis of the above technical solution, the host can also drive the swing crank arm 3 to drive the gate rod 1 to swing up and down through the reduction mechanism.

[0026] In the embodiment 1 of the hoop type loose limit angle adjustment device, please refer to Figures 2 to 5 On the basis of the above technical solution, the motor 7 of the host machine drives the active crank arm 5 to rotate through the reduction box 8, and the active crank arm 5 drives the swing crank arm 3 to swing through the connecting rod 4.

[0027] In the embodiment 2 of the hoop type loose limit angle adjustment device, please refer to Figure 6 On the basis of the previous technical solution, it can also be specifically that the loose limiting structure includes a positioning key 202 radially extending from the axial hole 201 on the gate lever 1 handle 2 and a corresponding limiting key groove 502 arranged on the rocker shaft 5, and the width of the limiting key groove 502 is greater than the thickness of the positioning key 202. Of course, in other embodiments, the loose limiting structure can also be designed on the swing crank arm and the rocker shaft as well as the gate lever handle and the rocker shaft.

[0028] In embodiment 2 of the hoop-type loose limit angle adjustment device, also for the convenience of processing, based on the previous technical solution, a positioning key groove is also provided in the axial hole 201 on the handle 2 of the gate lever 1, and the positioning key groove is adapted to be snapped into a part of a movable positioning key, and the other part of the positioning key is movably arranged in the limit key groove.

[0029] In Example 3 of the hoop type loose limit angle adjustment device, please refer to Figure 7 In addition to the above technical solution, the loose limiting structure may also include a limiting through-hole 303 extending axially into the shaft hole 301 on the side wall of the swing crank arm 3 and a corresponding positioning hole 503 provided on the rocker shaft 5. A positioning shaft 504 extends into the limiting through-hole 303 and is fixedly embedded therein. The diameter of the limiting through-hole 303 is larger than that of the positioning shaft 504. After assembly, a certain clearance exists between the positioning shaft 504 and the limiting through-hole 303, thereby limiting the adjustable range of the angle between the gate lever 1 and the swing crank arm 3. The positioning shaft 504 and the limiting through-hole 303 also provide a rough angular reference during assembly, saving time and effort, thereby reducing the difficulty of processing and installation.

[0030] In the embodiment of the hoop-type loose limit angle adjustment device, based on the previous technical solution, it can also be specifically that the axis hole of the swing crank arm 3 or the axis hole on the brake rod is tightened to the end of the rocker arm shaft by a tightening screw.

[0031] In an embodiment of the hoop-type loose limit angle adjustment device, based on the previous technical solution, the arc angle of the groove may be less than 30 degrees.

[0032] The above is an explanation of the hoop-type loose limit angle adjustment device of the present invention to help understand the present invention, but the implementation of the present invention is not limited to the above-mentioned embodiments. Any changes, modifications, substitutions, combinations, and simplifications made without departing from the principles of the present invention should be equivalent replacement methods and are included in the scope of protection of the present invention.

Claims

1. Hoop type loose limit angle adjustment device, characterized by : It includes a main unit and a gate rod, and the main unit drives the gate rod to swing up and down through a swing crank arm. A rocker shaft is connected between the swing crank arm and the gate rod, and a loose limiting structure is provided between the swing crank arm and the rocker shaft or / and between the rocker shaft and the gate rod, and the two ends of the rocker shaft are respectively inserted into the axial hole of the swing crank arm or the axial hole on the gate rod; the loose limiting structure includes a circumferential groove and a positioning protrusion that can limit and swing in the groove on the axial hole and the rocker shaft.

2. The hoop-type loose limit angle adjustment device according to claim 1, characterized in that: The loose limiting structure includes a positioning key radially extending from the shaft hole of the swing crank arm and a limiting key groove correspondingly arranged on the rocker shaft, and the width of the limiting key groove is greater than the thickness of the positioning key.

3. The hoop-type loose limit angle adjustment device according to claim 2, characterized in that: A positioning key slot is also provided in the shaft hole of the swing crank arm. The positioning key slot is adapted to receive a portion of the positioning key, and the other portion of the positioning key is movably provided in the limit key slot.

4. The hoop-type loose limit angle adjustment device according to claim 1, characterized in that: The loose limiting structure includes a positioning key radially extending from the shaft hole on the gate rod and a limiting key groove correspondingly arranged on the rocker shaft, and the width of the limiting key groove is greater than the thickness of the positioning key.

5. The hoop-type loose limit angle adjustment device according to claim 4, characterized in that: A positioning key slot is also provided in the shaft hole on the gate rod. The positioning key slot is adapted to receive a portion of the positioning key, and the other portion of the positioning key is movably provided in the limit key slot.

6. The hoop-type loose limit angle adjustment device according to claim 1, characterized in that: The host drives the swing crank arm to drive the gate rod to swing up and down through the speed reduction mechanism.

7. The hoop-type loose limit angle adjustment device according to claim 1, characterized in that: The end of the rocker arm shaft is clamped tightly by a clamping screw through the shaft hole of the rocker crank arm or the shaft hole on the gate rod.

8. The hoop-type loose limit angle adjustment device according to claim 7, characterized in that: The arc of the groove is less than 30 degrees.

9. The hoop-type loose limit angle adjustment device according to claim 1, characterized in that: The motor of the main machine drives the active crank arm to rotate through the reduction box, and the active crank arm drives the swing crank arm to swing through the connecting rod.

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