Pressure relief structure of mower

Abstract

The pressure relief structure comprises a machine frame and an installation seat fixed to the machine frame, a rotating metal plate is hinged to one side of the installation seat in a rotating mode, an elastic reset piece is connected between the rotating metal plate and the upper portion of the installation seat, a pressure relief valve close to the inner side face of the rotating metal plate is arranged on one side of the machine frame, and a pressure relief valve is arranged on the other side of the machine frame. One end of the elastic reset piece is connected with a steel wire pull rope, and one end of the steel wire pull rope away from the elastic reset piece is connected with a knob; under the lateral pushing cooperation of the slope abutting block and the slope face, the pressure release valve is smoothly pressed in, the pressing stroke changes along with the rising amplitude of the rotary metal plate, the larger the rising amplitude is, the deeper the pressing in is, the larger the pressure release force is, and vice versa, the pressure release valve can be adjusted to be smaller or closed after the rotary knob is loosened, and the pressure release valve has the advantages of being simple in structure and stable in output, and is suitable for popularization and application. Excessive abrasion of a brake system and structural components caused by pressure sudden change is effectively reduced, and the service life of the brake system and the structural components is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of auxiliary accessories for lawn mowers, in particular to a pressure relief structure for lawn mowers. Background Art

[0002] A lawn mower is a mechanical tool used for trimming lawns, vegetation, and the like. It is also known as a weeder, lawnmower, or lawn trimmer. A lawn mower primarily consists of a cutter disc, an engine, wheels, a travel mechanism, blades, armrests, and a control system. In prior art, a lawn mower's hydraulic system may accumulate a certain amount of pressure after a period of use. Specifically, the hydraulic pump itself generates pump pressure through the movement of the pump plunger, which serves as the mower's power. When the machine is stopped, the pressure within the hydraulic pump remains. If the mower is to be moved and there is pressure inside, it cannot be pushed, requiring pressure relief. Therefore, to address and resolve this issue, a pressure relief structure for a lawn mower is provided. Utility Model Content

[0003] The purpose of this section is to summarize some aspects of the embodiments of the present invention and briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this section and in the abstract and title of the utility model to avoid obscuring the purpose of this section, the abstract and the title of the utility model, and such simplifications or omissions shall not be used to limit the scope of the present invention.

[0004] Therefore, the purpose of the present invention is to provide a pressure relief structure for a lawn mower to solve the problem raised in the above background technology that when the machine is stopped, the pressure in the hydraulic pump still exists. If the lawn mower wants to move and there is pressure inside, it will not be able to move, so pressure relief is required.

[0005] To achieve the above-mentioned object, the present invention provides the following technical solution: a pressure relief structure for a lawn mower, comprising a frame and a mounting base fixed to the frame, a rotating sheet metal being rotatably hinged on one side of the mounting base, an elastic reset member being connected between the rotating sheet metal and the upper portion of the mounting base, a pressure relief valve being provided on one side of the frame close to the inner side surface of the rotating sheet metal, a steel wire rope being connected to one end of the elastic reset member, and a knob being connected to the end of the steel wire rope away from the elastic reset member;

[0006] Among them, the steel wire rope is rolled up by the knob and drives the elastic reset part to contract, which in turn drives the rotating sheet metal to press the pressure relief valve in and achieve the pressure relief effect.

[0007] As a preferred solution of the pressure relief structure of the lawn mower described in the utility model, a rotating shaft is provided at the hinged connection between the rotating sheet metal and the mounting seat.

[0008] As a preferred solution of the pressure relief structure of a lawn mower described in the utility model, the side of the rotating sheet metal facing the pressure relief valve has a sloped block, and the outer cover end of the pressure relief valve has a sloped surface matching the sloped block.

[0009] As a preferred solution of the pressure relief structure of the lawn mower described in the utility model, the upper end of the mounting seat has a first positioning ear, and the upper end of the rotating sheet metal has a second positioning ear;

[0010] The elastic reset member includes a sleeve with one end fixed to the first positioning ear, a guide rod telescopically extending from the other end and inner side of the sleeve, a limit block fixed to the outer end of the guide rod and mounted on the second positioning ear, and a spring sleeved on the outer circumference of the guide rod with one end abutting against the second positioning ear and the other end abutting against the end of the sleeve;

[0011] Wherein, one end of the steel wire rope is passed through the inner side of the cylinder sleeve and connected to the guide rod.

[0012] As a preferred solution of the pressure relief structure of the lawn mower described in the utility model, a rope protection sleeve is further provided on the outer side of the steel wire rope.

[0013] Compared with the prior art, the beneficial effect of the utility model is that when the pressure in the braking system of the equipment is too high, the pressure relief structure of the lawn mower can pull the wire rope and drive the elastic reset part to contract by turning the knob, thereby driving the rotating sheet metal to rotate. With the cooperation of the slope block and the slope surface side push, the pressure relief valve is smoothly pressed in, and the pressing stroke changes with the rising amplitude of the rotating sheet metal. The greater the rising amplitude, the deeper the pressing and the greater the pressure relief, and vice versa. After loosening the rotating knob, the pressure relief valve can be adjusted down or closed. It has the characteristics of simple structure and stable output, so that the lawn mower can be pushed normally when the machine is in the stopped state. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is an overall schematic diagram of the pressure relief structure of the utility model;

[0015] Figure 2 This is a schematic diagram of the structure of the elastic reset member of the utility model;

[0016] Figure 3 This is a schematic diagram of the matching structure of the rotating sheet metal and the pressure relief valve of the utility model.

[0017] In the figure: 100, frame; 200, mounting base; 210, positioning ear 1; 300, rotating sheet metal; 310, positioning ear 2; 320, slope block; 330, rotating shaft; 400, elastic reset member; 410, sleeve; 420, guide rod; 430, limit block; 440, spring; 500, wire rope; 510, rope guard sleeve; 600, knob; 700, pressure relief valve; 710, slope surface. DETAILED DESCRIPTION

[0018] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0019] Next, the present invention is described in detail with reference to schematic diagrams. For ease of illustration, cross-sectional views of device structures may be partially enlarged and not to scale when describing the embodiments of the present invention. Furthermore, the schematic diagrams are merely illustrative and should not limit the scope of protection of the present invention. Furthermore, in actual production, three-dimensional dimensions, including length, width, and depth, should be included.

[0020] In order to make the purpose, technical solutions and advantages of the present invention more clear, the embodiments of the present invention will be further described in detail below with reference to the accompanying drawings.

[0021] Figure 1-Figure 3 Shown is a schematic diagram of the entire structure of the pressure relief structure of a lawn mower of the present invention, please refer to Figure 1-Figure 3 , a pressure relief structure of a lawn mower in this embodiment includes a frame 100 and a mounting base 200 fixed to the frame 100, a rotating sheet metal 300 is rotatably hinged on one side of the mounting base 200, an elastic reset member 400 is connected between the rotating sheet metal 300 and the upper part of the mounting base 200, and a pressure relief valve 700 close to the inner side surface of the rotating sheet metal 300 is provided on one side of the frame 100, and a steel wire rope 500 is connected to one end of the elastic reset member 400, and a knob 600 is connected to the end of the steel wire rope 500 away from the elastic reset member 400; wherein, the steel wire rope 500 is wound by the knob 600 and drives the elastic reset member 400 to contract, thereby driving the rotating sheet metal 300 to press the pressure relief valve 700 in and achieve the pressure relief effect.

[0022] The hinged connection between the rotating sheet metal 300 and the mounting base 200 has a rotating shaft 330. The side of the rotating sheet metal 300 facing the pressure relief valve 700 has a sloped stop 320, and the outer cover of the pressure relief valve 700 has a sloped surface 710 that matches the sloped stop 320. It can be understood that when one side of the rotating sheet metal 300 is pulled upward, the pressure relief valve 700 is smoothly pressed in by sliding sideways on the sloped stop 320 and the sloped surface 710. The stroke of the pressure relief valve 700 varies with the rise of the rotating sheet metal 300: the higher it is, the deeper the pressure is pressed in, and the greater the pressure relief, and vice versa. The mounting base 200 has a first positioning ear 210 at its upper end, and the rotating sheet metal 300 has a second positioning ear 310 at its upper end. The elastic return member 400 includes a sleeve 410 with one end fixed to the first positioning ear 210, a guide rod 420 that extends from the other end and inside the sleeve 410, a stopper 430 fixed to the outer end of the guide rod 420 and mounted on the second positioning ear 310, and a spring 440 that is sleeved on the outer circumference of the guide rod 420 and abuts against the second positioning ear 310 at one end and against the end of the sleeve 410 at the other end. A steel wire rope 500 has one end that passes through the inner side of the sleeve 410 and is connected to the guide rod 420. It is understood that after the elastic return member 400 is inserted into the first positioning ear 210 and the second positioning ear 310, it can be fixed to the corresponding positioning ear by means of a clamp, threaded connection, or the like. Specifically, in this embodiment, when the pressure in the braking system of the equipment is too high, by turning the knob 600, the steel wire rope 500 is pulled and the elastic reset part 400 is driven to contract, thereby driving the rotating sheet metal 300 to rotate. With the side push cooperation of the slope block 320 and the slope surface 710, the pressure relief valve 700 is smoothly pressed in, and the pressing stroke varies with the rising amplitude of the rotating sheet metal 300. The greater the rising amplitude, the deeper the pressing and the greater the pressure relief, and vice versa. After loosening the rotating knob 600, the pressure relief valve 700 can be adjusted down or closed. It has the characteristics of simple structure and stable output, so that the lawn mower can be pushed normally when the machine is in a stopped state.

[0023] Furthermore, in this embodiment, the rotation of the driving knob 600 may be electric, hydraulic, pneumatic or manual, as long as it is convenient for practical application.

[0024] Furthermore, a rope protection sleeve 510 is also provided on the outside of the steel wire rope 500. The rope protection sleeve 510 provided can provide external protection to the steel wire rope 500, and lubricating oil is also added inside the rope protection sleeve 510 to ensure the stable use of the rope protection sleeve 510.

[0025] In summary, the pressure relief structure of a lawn mower in this embodiment, when in use, when the pressure in the braking system of the equipment is too high, by turning the knob 600, the wire rope 500 is pulled and the elastic reset part 400 is driven to contract, thereby driving the rotating sheet metal 300 to rotate. With the side push cooperation of the slope block 320 and the slope surface 710, the pressure relief valve 700 is smoothly pressed in, and the pressing stroke changes with the rising amplitude of the rotating sheet metal 300. The greater the rising amplitude, the deeper the pressing and the greater the pressure relief, and vice versa. After loosening the rotating knob 600, the pressure relief valve 700 can be adjusted down or closed. It has the characteristics of simple structure and stable output, so that the lawn mower can be pushed normally when the machine is in the stopped state.

[0026] While the present invention has been described above with reference to specific embodiments, various modifications may be made and equivalent components may be substituted without departing from the scope of the present invention. In particular, as long as no structural conflicts exist, the various features of the embodiments disclosed herein may be combined with one another in any manner, and the omission of an exhaustive description of these combinations in this specification is solely for the sake of space and resource conservation. Therefore, the present invention is not limited to the specific embodiments disclosed herein, but encompasses all technical solutions within the scope of the claims.

Claims

1. A pressure relief structure for a lawn mower, characterized in that: The invention comprises a frame (100) and a mounting base (200) fixed to the frame (100); a rotating sheet metal (300) is rotatably hinged on one side of the mounting base (200); an elastic reset member (400) is connected between the rotating sheet metal (300) and the upper portion of the mounting base (200); a pressure relief valve (700) is provided on one side of the frame (100) and is close to the inner side surface of the rotating sheet metal (300); a steel wire rope (500) is connected to one end of the elastic reset member (400); and a knob (600) is connected to the end of the steel wire rope (500) away from the elastic reset member (400); The steel wire rope (500) is rolled up by the knob (600) and drives the elastic reset member (400) to contract, thereby driving the rotating sheet metal (300) to press the pressure relief valve (700) in and achieve the pressure relief effect.

2. The pressure relief structure of a lawn mower according to claim 1, characterized in that: The hinged connection between the rotating sheet metal (300) and the mounting seat (200) is provided with a rotating shaft (330).

3. The pressure relief structure of a lawn mower according to claim 1, characterized in that: The rotating sheet metal (300) has a sloped stopper (320) on one side facing the pressure relief valve (700), and the outer cover end of the pressure relief valve (700) has a sloped surface (710) matching the sloped stopper (320).

4. The pressure relief structure of a lawn mower according to claim 1, characterized in that: The upper end of the mounting seat (200) has a first positioning ear (210), and the upper end of the rotating sheet metal (300) has a second positioning ear (310); The elastic reset member (400) comprises a sleeve (410) with one end fixed on the first positioning ear (210), a guide rod (420) telescopically connected to the other end and inner side of the sleeve (410), a limit block (430) fixed to the outer end of the guide rod (420) and mounted on the second positioning ear (310), and a spring (440) sleeved on the outer peripheral side of the guide rod (420) with one end abutting against the second positioning ear (310) and the other end abutting against the end of the sleeve (410); One end of the steel wire rope (500) is passed through the inner side of the sleeve (410) and connected to the guide rod (420).

5. The pressure relief structure of a lawn mower according to claim 1, characterized in that: The outer side of the steel wire rope (500) is also provided with a rope protection sleeve (510).

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