A handrail

Abstract

A handrail includes a mounting base (1), a handrail tube (2) rotatably connected to the top of the mounting base (1); a rotation control mechanism (3) is provided at one end inside the mounting base (1), and a chuck shaft mechanism (4) is provided at the other end, wherein the height adjustment end of the rotation control mechanism (3) extends out of the side wall of the mounting base (1), the horizontal adjustment end cooperates with the chuck in the chuck shaft mechanism (4), and the control end is connected to the operating mechanism; a height adjustment plate (5) is provided on the handrail tube (2), and the height adjustment plate (5) cooperates with the height adjustment end of the rotation control mechanism (3).

Description

Technical Field

[0001] This invention relates to the field of agricultural machinery technology, specifically to a handrail frame. Background Technology

[0002] A handrail on agricultural machinery refers to a handheld structure installed on the machinery for the operator to control and operate it. A handrail typically consists of a handle arm and an operating part for the operator to hold. One end of the handle arm connects to the main body of the machinery, and the other end connects to the operating part. Due to varying operator heights and application scenarios, the height and angle of the handrail need to be adjusted according to the operational requirements.

[0003] In the prior art, such as patent number 201120164384.2, entitled "A Tiller Handle Adjustment Device", the handlebar frame is adjusted up and down and left and right by setting an upper adjustment seat and a lower adjustment seat and clamping the handlebar frame between the upper adjustment seat and the lower adjustment seat. This structure adjusts the angle of the handlebar frame by tightening or loosening bolts. The adjustment process requires the use of other tools and cannot be operated while driving, making it inconvenient to operate. Summary of the Invention

[0004] To address the shortcomings of existing technologies, this invention proposes a handrail frame that uses a pull cable to achieve vertical height adjustment and horizontal rotation adjustment. The specific technical solution is as follows:

[0005] A handrail frame includes a mounting base (1), characterized in that: a handrail frame tube (2) is rotatably connected to the top of the mounting base (1);

[0006] A rotation control mechanism (3) is provided at one end of the mounting base (1), and a chuck shaft mechanism (4) is provided at the other end. The height adjustment end of the rotation control mechanism (3) extends out of the side wall of the mounting base (1), the horizontal adjustment end cooperates with the chuck in the chuck shaft mechanism (4), and the control end is connected to the operating mechanism.

[0007] A height adjustment plate (5) is provided on the handrail tube (2), which cooperates with the height adjustment end of the rotation control mechanism (3).

[0008] During use, the handrail can be adjusted up and down and left and right horizontally by means of the control mechanism, such as the height adjustment end and the horizontal adjustment end in the pull-wire control rotation control mechanism (3). The control is simple and the installation is convenient.

[0009] Preferably, the rotation control mechanism (3) is provided with a fixed cylinder (301), which is inserted into the mounting base (1). A ball bearing retainer (302) is movably inserted inside the fixed cylinder (301). One end of the ball bearing retainer (302) is provided with a protrusion, which protrudes through the side of the mounting base (1) and cooperates with the height adjustment plate (5). The other end of the ball bearing retainer (302) is connected to a control cable, and the free end of the control cable protrudes through the fixed cylinder (1). A return spring (303) is provided between the other end of the ball bearing retainer (302) and the inner wall of the fixed cylinder (301); a V-shaped groove (304) is provided in the middle of the ball bearing retainer (302), and a positioning bead (305) is provided in the V-shaped groove (304); a positioning through hole (306) is provided in the middle of the fixed cylinder (301), and the positioning bead (305) passes through the positioning through hole (306) and cooperates with the chuck in the chuck shaft mechanism (4).

[0010] During use, the control cable pulls the steel ball retainer (302). When the pulling force exceeds the return spring (303), the V-groove (304) aligns with the positioning through hole (306), and the positioning ball (305) falls into the V-groove (304). At this time, the positioning ball (305) does not contact the retainer in the retainer shaft mechanism (4), and the retainer can rotate freely. At this time, the handrail can be adjusted horizontally.

[0011] At the same time, during the pulling process of the control cable, the protrusion of the steel ball clamp (302) retracts, causing it to exit the height adjustment plate (5), at which time the handrail frame achieves height adjustment;

[0012] After the handrail height and horizontal position are adjusted, the control cable is released. Under the action of the return spring (303), the steel ball retainer (302) is reset, and the positioning ball (305) in the V-groove (304) is squeezed out of the positioning through hole (306). The positioning ball (305) engages with the retaining wheel. At the same time, the protrusion of the steel ball retainer (302) extends into the height adjustment plate (5) to lock the handrail.

[0013] Preferably, the chuck shaft mechanism (4) is provided with a rotating shaft (401), a chuck (402) is sleeved in the middle of the rotating shaft (401), and bearings (403) are respectively sleeved at both ends of the rotating shaft (401). The outer ring of the bearing (403) is fixed to the inner wall of the mounting base (1). The cooperation between the chuck (402) and the bearing (403) allows for smooth and easy rotation, facilitating horizontal adjustment.

[0014] Preferably, a semi-circular groove (101) is provided in the middle of the top surface of the mounting base (1), and the middle part of the handrail frame tube (2) is fixed in the semi-circular groove (101) by a fixing sheet metal (102). Through the cooperation of the fixing sheet metal (102) and the semi-circular groove (101), the rotation is smooth and the adjustment is convenient.

[0015] As a preferred embodiment, the height adjustment plate (5) has a fan-shaped structure. Fixing holes (501) are evenly provided at the large arc end of the height adjustment plate (5), and mounting holes (502) are provided at the small arc end. The mounting holes (502) are fitted onto the handrail frame tube (2).

[0016] The beneficial effects of the present invention are as follows: In the prior art, two control mechanisms are often used, such as pull wires, to control the horizontal rotation and height adjustment of the handrail respectively. The overall structure is complex and the operation is inconvenient. The present invention uses a single control mechanism, such as pull wires, to simultaneously realize the horizontal rotation and height adjustment of the handrail with the cooperation of the adjustment plate and the chuck. Moreover, during the adjustment process, because the bearings are involved, the rotation is smooth and easy, and the operation is convenient and labor-saving.

[0017] The rotation control mechanism uses a V-shaped groove on the steel ball bearing post and a positioning ball to cooperate with the bearing wheel. The overall structure is simple, with high mechanical strength and excellent reliability. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of the present invention.

[0019] Figure 2 for Figure 1 Top view.

[0020] Figure 3 for Figure 1 Sectional view of AA.

[0021] Figure 4 This is a schematic diagram of the assembly structure of the present invention. Detailed Implementation

[0022] The preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings, so that the advantages and features of the present invention can be more easily understood by those skilled in the art, thereby providing a clearer and more explicit definition of the scope of protection of the present invention.

[0023] like Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown: A handrail frame includes a mounting base 1, which is a rectangular shell structure. A semi-circular groove 101 is provided in the middle of the top surface of the mounting base 1. The middle part of the handrail frame tube 2 is fixed in the semi-circular groove 101 by a fixing sheet metal 102.

[0024] A rotation control mechanism 3 is provided at one end of the mounting base 1, and a chuck shaft mechanism 4 is provided at the other end. The height adjustment end of the rotation control mechanism 3 extends out of the side wall of the mounting base 1, the horizontal adjustment end cooperates with the chuck in the chuck shaft mechanism 4, and the control end is connected to the operating mechanism.

[0025] A height adjustment plate 5 is provided on the handrail tube 2, which cooperates with the height adjustment end of the rotation control mechanism 3.

[0026] The rotation control mechanism 3 is provided with a fixed cylinder 301, which is inserted into the mounting base 1. A cylindrical steel ball retainer 302 is movably inserted inside the fixed cylinder 301. One end of the steel ball retainer 302 is provided with a protrusion, which protrudes through the side of the mounting base 1 and cooperates with the height adjustment plate 5.

[0027] The other end of the ball bearing retainer 302 is connected to a control cable, the free end of which passes through the end of the fixed cylinder 301. A return spring 303 is provided between the other end of the ball bearing retainer 302 and the inner wall of the fixed cylinder 301.

[0028] A V-shaped groove 304 is provided in the middle of the steel ball retainer 302, and a positioning bead 305 is provided in the V-shaped groove 304. A positioning through hole 306 is provided in the middle of the fixed cylinder 301, and the positioning bead 305 passes through the positioning through hole (306) and cooperates with the retaining wheel in the retaining wheel shaft mechanism 4.

[0029] The chuck shaft mechanism 4 is provided with a rotating shaft 401, a chuck 402 is sleeved in the middle of the rotating shaft 401, and bearings 403 are respectively sleeved at both ends of the rotating shaft 401. The outer ring of the bearing 403 is fixed to the inner wall of the mounting base 1.

[0030] The height adjustment plate 5 has a fan-shaped structure. Fixing holes 501 are evenly provided at the large arc end of the height adjustment plate 5, and mounting holes 502 are provided at the small arc end. The mounting holes 502 are fitted onto the handrail frame tube 2.

Claims

1. A handrail comprising a mounting base (1), characterised in that: A handrail tube (2) is rotatably connected to the top of the mounting base (1); A rotation control mechanism (3) is provided at one end inside the mounting base (1), and a chuck shaft mechanism (4) is provided at the other end. The height adjustment end of the rotation control mechanism (3) extends out of the side wall of the mounting base (1), the horizontal adjustment end cooperates with the chuck in the chuck shaft mechanism (4), and the control end is connected to the operating mechanism. A height adjustment plate (5) is provided on the handrail tube (2), and the height adjustment plate (5) cooperates with the height adjustment end of the rotation control mechanism (3); The rotation control mechanism (3) is provided with a fixed cylinder (301), which is inserted into the mounting base (1). A steel ball retainer (302) is movably inserted inside the fixed cylinder (301). One end of the steel ball retainer (302) is provided with a protrusion, which protrudes through the side of the mounting base (1) and cooperates with the height adjustment plate (5). The other end of the ball bearing retainer (302) is connected to a control cable, the free end of which passes through the fixed cylinder (301). A return spring (303) is provided between the other end of the ball bearing retainer (302) and the inner wall of the fixed cylinder (301). The steel ball retainer (302) has a V-shaped groove (304) in the middle, and a positioning ball (305) is provided in the V-shaped groove (304). A positioning through hole (306) is provided in the middle of the fixed cylinder (301). The positioning ball (305) passes through the positioning through hole (306) and cooperates with the retaining wheel in the retaining wheel shaft mechanism (4). The chuck shaft mechanism (4) is provided with a rotating shaft (401), a chuck (402) is sleeved in the middle of the rotating shaft (401), and bearings (403) are sleeved at both ends of the rotating shaft (401), with the outer ring of the bearing (403) fixed to the inner wall of the mounting base (1).

2. The handrail of claim 1, wherein: A semi-circular groove (101) is provided in the middle of the top surface of the mounting base (1), and the middle part of the handrail frame tube (2) is fixed in the semi-circular groove (101) by a fixing sheet metal (102).

3. The handrail frame according to claim 1, characterized in that: The height adjustment plate (5) has a fan-shaped structure. Fixing holes (501) are evenly provided at the large arc end of the height adjustment plate (5), and mounting holes (502) are provided at the small arc end. The mounting holes (502) are fitted onto the handrail frame tube (2).

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