CN111011027A - Hydraulic trimmer for environmental sanitation and greening - Google Patents

Hydraulic trimmer for environmental sanitation and greening Download PDF

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Publication number
CN111011027A
CN111011027A CN201911390128.2A CN201911390128A CN111011027A CN 111011027 A CN111011027 A CN 111011027A CN 201911390128 A CN201911390128 A CN 201911390128A CN 111011027 A CN111011027 A CN 111011027A
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China
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hole
oil
valve
communicated
piston
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CN201911390128.2A
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Chinese (zh)
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刘艳荣
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Individual
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Priority to CN201911390128.2A priority Critical patent/CN111011027A/en
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    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01G—HORTICULTURE; CULTIVATION OF VEGETABLES, FLOWERS, RICE, FRUIT, VINES, HOPS OR SEAWEED; FORESTRY; WATERING
    • A01G3/00—Cutting implements specially adapted for horticultural purposes; Delimbing standing trees
    • A01G3/08—Other tools for pruning, branching or delimbing standing trees
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B13/00—Details of servomotor systems ; Valves for servomotor systems
    • F15B13/02—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
    • F15B13/04—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with a single servomotor
    • F15B13/0401—Valve members; Fluid interconnections therefor
    • F15B13/0402—Valve members; Fluid interconnections therefor for linearly sliding valves, e.g. spool valves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
    • F15B15/08—Characterised by the construction of the motor unit
    • F15B15/14—Characterised by the construction of the motor unit of the straight-cylinder type
    • F15B15/1423—Component parts; Constructional details
    • F15B15/1447—Pistons; Piston to piston rod assemblies
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
    • F15B15/08—Characterised by the construction of the motor unit
    • F15B15/14—Characterised by the construction of the motor unit of the straight-cylinder type
    • F15B15/1423—Component parts; Constructional details
    • F15B15/1476—Special return means

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Biodiversity & Conservation Biology (AREA)
  • Ecology (AREA)
  • Forests & Forestry (AREA)
  • Environmental Sciences (AREA)
  • Fluid-Damping Devices (AREA)

Abstract

The invention discloses a hydraulic trimmer for environmental sanitation and greening, which comprises a fixed plate, wherein a movable plate is connected onto the fixed plate in a sliding manner, a row of fixed teeth are arranged on the side edge of the fixed plate along the length direction of the fixed plate, and a row of movable teeth matched with the fixed teeth are arranged on the side surface of the movable plate; the fixed plate is fixedly provided with a housing, the left side of the housing is fixedly provided with a hydraulic power mechanism for driving the movable plate to reciprocate on the fixed plate along the length direction of the fixed plate, the left side of the movable plate close to the housing is provided with a connecting plate, and a piston rod of the hydraulic power mechanism is fixedly connected with the connecting plate; the hydraulic trimmer for environmental sanitation and greening has the advantages that the structure is simple, and the phenomenon of jamming or damage cannot occur when the saw teeth move mutually.

Description

Hydraulic trimmer for environmental sanitation and greening
Technical Field
The invention belongs to the technical field of garden machinery, and particularly relates to a hydraulic trimmer for environmental sanitation and greening.
Background
In the environmental sanitation greening work, the appearance of a green belt is required to be frequently trimmed, and the prior trimming of the green belt is mainly to manually trim the green belt by using a pair of scissors or an electric tool after leveling the green belt by using a rope line. The traditional hedge trimming mode not only causes hidden danger to the personal safety of operators, but also wastes time and labor. Because the highway is a totally-enclosed road section and the mileage is long, the personal safety and the labor intensity of operators are increased. In recent years, a series of automatic pruning machines appear in the field of garden machinery in China, but the following defects still exist: (1) the equipment is too large, occupies a large space and hinders the normal operation of the road; (2) the energy consumption is large, and most of the energy consumption is driven by a diesel engine and a gasoline engine, so that the environment is influenced; (3) the connecting rod or the gear is used for transmission in the structure, the phenomena of blocking, damage and the like easily occur, the service life is short, and the maintenance is troublesome.
Disclosure of Invention
The invention aims to provide a hydraulic trimmer for environmental sanitation and greening, which has a simple structure and avoids the phenomenon of jamming or damage when sawteeth move mutually.
In order to achieve the purpose, the invention provides the following technical scheme: a hydraulic trimmer for environmental sanitation and greening comprises a fixed plate, wherein a movable plate is connected to the fixed plate in a sliding mode, a row of fixed teeth are arranged on the side edge of the fixed plate along the length direction of the fixed plate, and a row of movable teeth matched with the fixed teeth are arranged on the side face of the movable plate; the movable plate is characterized in that a housing is fixedly mounted on the fixed plate, a hydraulic power mechanism used for driving the movable plate to reciprocate on the fixed plate along the length direction of the movable plate is fixedly mounted on the left side of the housing, a connecting plate is arranged on the left side, close to the housing, of the movable plate, and a piston rod of the hydraulic power mechanism is fixedly connected with the connecting plate.
In a further technical scheme, the hydraulic power mechanism comprises a valve block, a through mounting hole is formed in the valve block along the moving direction of the movable plate, a left end cover is fixedly mounted at the left end of the mounting hole of the valve block, a right end cover is fixedly mounted at the right end of the mounting hole, and the right end cover is fixedly mounted at the left side of the housing; the valve block is provided with a P port and a T port which are communicated with the mounting hole;
a piston body is connected in the mounting hole in a sliding manner, a guide sliding rod is arranged at an eccentric position between the left end cover and the right end cover, and a guide sliding hole matched with the guide sliding rod is formed in the piston body along the movement direction of the piston body; a left piston cavity is formed between the left side and the left end cover of the piston body in the mounting hole, and a right piston cavity is formed between the right side and the right end cover of the piston body in the mounting hole; a valve hole with an opening at the right end is formed in the piston body along the movement direction of the piston body, a valve core is connected in the valve hole in a sliding manner, a piston rod penetrating through a right end cover is arranged on the right side of the valve core in a rightward extending manner, and the right end of the piston rod is fixedly connected with a connecting plate;
an oil inlet groove communicated with the P port and an oil return groove communicated with the T port are formed in the piston body, and an oil inlet hole used for communicating the valve hole and the oil inlet groove and an oil return hole used for communicating the oil return groove and the valve hole are formed in the piston body; when the valve core is positioned at the left end of the valve hole, the left piston cavity is communicated with the oil inlet hole, and the right piston cavity is communicated with the oil return hole; when the valve core is positioned at the right end of the valve hole, the left piston cavity is communicated with the oil return hole, and the right piston cavity is communicated with the oil inlet hole;
the hydraulic power mechanism also comprises a valve control assembly for controlling the valve core to reciprocate left and right in the valve hole.
In a further technical scheme, a right oil hole for communicating the valve hole and the right piston cavity and a left oil hole for communicating the valve hole and the left piston cavity are formed in the piston body; the side surface of the circumference of the valve core is provided with a first ring groove, a second ring groove and a third ring groove in sequence from left to right, the third ring groove is communicated with an oil return hole, a first oil hole for communicating the first ring groove and the third ring groove is arranged in the piston rod and the valve core, when the valve core is positioned at the right end of the valve hole, the oil inlet hole is communicated with the right oil hole through the second ring groove, the left oil hole is communicated with the third ring groove through the first ring groove and the first oil hole, and the third ring groove is disconnected with the right oil hole; when the valve core is positioned at the left end of the valve hole, the oil inlet hole is communicated with the left oil hole through the second annular groove, the right oil hole is communicated with the third annular groove, and the left oil hole is disconnected with the first annular groove.
In a further technical scheme, the valve control assembly comprises a right retaining ring, and the right retaining ring is installed at the right end of the piston body and is sleeved on the piston rod; a left control cavity is formed between the left end of the valve core and the bottom of the left end of the valve hole in the valve hole, and a right control cavity is formed between the right end of the valve core and the right gear ring; a first damping hole for communicating the left control cavity and the right piston cavity is formed in the piston body; a left oil port communicated with the P port is formed in the inner side wall of the mounting hole on the left side of the P port, a left annular groove is formed in the position, close to the left end cover, of the outer circumferential side face of the piston body, and a right annular groove is formed in the position, close to the right end cover, of the outer circumferential side face of the piston body; the side surface of the outer circumference of the piston body is provided with a right communicating groove for communicating the oil inlet groove and the right ring groove; a left oil hole for communicating the left ring groove with the left control cavity and a right oil hole for communicating the right ring groove with the right control cavity are formed in the piston body; when the piston body is located the right end of mounting hole, left hydraulic fluid port and left annular intercommunication.
In a further technical scheme, a right inner ring groove is formed in the right end cover on the outer side of the circumference of the piston rod, a second oil hole communicated with the left control cavity is formed in the piston rod, and a right first oil port communicated with the second oil hole and a right second oil port communicated with the first oil hole are formed in the side face of the outer circumference of the piston rod; when the piston body is positioned at the left end of the mounting hole, the left control cavity is communicated with the third ring groove through the second oil hole, the right first oil hole, the right inner ring groove, the right second oil hole and the first oil hole.
In a further technical scheme, protruding plates are arranged at two ends of the fixed plate in an extending mode, limiting sliding grooves are formed in each protruding plate, and the movable plate is connected into the two limiting sliding grooves in a sliding mode.
Advantageous effects
Compared with the prior art, the technical scheme of the invention has the following advantages:
(1) the movable plate is directly controlled by using the hydraulic power mechanism to drive the movable teeth to move, so that the phenomenon of locking cannot be generated, the faults are few, and the service life is long;
(2) the oil circuit is controlled by using the relative position change of the piston body and the valve core, so that one part has multiple purposes and high integration;
(3) the reversing is controlled by all oil ways, so that the fault is less, the long-time work can be realized, and the service life is long.
Drawings
FIG. 1 is a front view of the present invention;
FIG. 2 is a left side view of the present invention;
FIG. 3 is a top view of the present invention;
FIG. 4 is a block diagram of the present invention;
FIG. 5 is an internal structural view of the present invention;
FIG. 6 is a cross-sectional view of the hydraulic power mechanism of the present invention with the piston body at the leftmost end and the valve core at the left end of the valve hole;
FIG. 7 is a cross-sectional view taken along line A-A of FIG. 6;
FIG. 8 is a cross-sectional view of the hydraulic power mechanism of the present invention with the piston body at the rightmost end and the spool at the left end of the valve hole;
FIG. 9 is a cross-sectional view of the hydraulic power mechanism of the present invention with the piston body at the rightmost end and the spool at the right end of the valve hole;
fig. 10 is a sectional view of the hydraulic power mechanism of the present invention with the piston body at the leftmost end and the valve core at the right end of the valve hole.
Detailed Description
Referring to fig. 1-10, a hydraulic trimmer for environmental sanitation and greening comprises a fixed plate 6a and a movable plate 5a, wherein both ends of the fixed plate 6a are respectively provided with a convex plate 6a1 in an extending manner, each convex plate 6a1 is provided with a limit sliding groove, and both ends of the movable plate 5a are respectively connected in the two limit sliding grooves in a sliding manner; a row of fixed teeth 6 are arranged on the side edge of the fixed plate 6a along the length direction of the fixed plate, and a row of movable teeth 5 matched with the fixed teeth 6 are arranged on the side surface of the movable plate 5 a; the fixed plate 6a is fixedly provided with a housing 7, the housing 7 is provided with a connector 7a, and the connector 7a is arranged to facilitate the installation of the hydraulic trimmer for environmental sanitation greening on mechanical equipment. A hydraulic power mechanism for driving the movable plate 5a to reciprocate on the fixed plate 6a along the length direction is fixedly arranged at the left side of the housing 7, a connecting plate 5a1 is arranged at the left side of the movable plate 5a close to the housing 7, and a piston rod 3j of the hydraulic power mechanism is fixedly connected with the connecting plate 5a 1.
The hydraulic power mechanism comprises a valve block 1, a through mounting hole 101 is formed in the valve block 1 along the moving direction of a movable plate 5a, a left end cover 9 is fixedly mounted at the left end of the mounting hole 101 of the valve block 1, a right end cover 4 is fixedly mounted at the right end of the mounting hole 101, and the right end cover 4 is fixedly mounted at the left side of a housing 7; a P port and a T port which are communicated with the mounting hole 101 are arranged on the valve block 1; a piston body 2 is connected in the mounting hole 101 in a sliding manner, a guide sliding rod 11 is arranged at an eccentric position between the left end cover 9 and the right end cover 4, and a guide sliding hole 21 matched with the guide sliding rod 11 is formed in the piston body 2 along the movement direction; a left piston cavity 1c is formed between the left side of the piston body 2 and the left end cover 9 in the mounting hole 101, and a right piston cavity 1b is formed between the right side of the piston body 2 and the right end cover 4; a valve hole 22 with an opening at the right end is formed in the piston body 2 along the movement direction of the piston body, a valve core 3 is connected in the valve hole 22 in a sliding mode, a piston rod 3j penetrating through a right end cover 4 is arranged on the right side of the valve core 3 in a rightward extending mode, and the right end of the piston rod 3j is fixedly connected with a connecting plate 5a 1.
An oil inlet groove 2a communicated with the port P and an oil return groove 2b communicated with the port T are formed in the piston body 2, and an oil inlet hole 2e for communicating the valve hole 22 with the oil inlet groove 2a and an oil return hole 2g for communicating the oil return groove 2b with the valve hole 22 are formed in the piston body 2; when the valve core 3 is positioned at the left end of the valve hole 22, the left piston cavity 1c is communicated with the oil inlet hole 2e, and the right piston cavity 1b is communicated with the oil return hole 2 g; when the valve core 3 is positioned at the right end of the valve hole 22, the left piston cavity 1c is communicated with the oil return hole 2g, and the right piston cavity 1b is communicated with the oil inlet hole 2 e; the hydraulic power mechanism also comprises a valve control assembly for controlling the valve core 3 to reciprocate left and right in the valve hole 22.
A right oil hole 2f and a right oil hole 2h for communicating the valve hole 22 with the right piston cavity 1b and a left oil hole 2g and a left oil hole 2i for communicating the valve hole 22 with the left piston cavity 1c are formed in the piston body 2; the side surface of the circumference of the valve core 3 is provided with a first ring groove 3g, a second ring groove 3e and a third ring groove 3d in sequence from left to right, the third ring groove 3d is communicated with an oil return hole 2g, the piston rod 3j and the valve core 3 are internally provided with first oil holes 3b, 3a and 3c for communicating the first ring groove 3g with the third ring groove 3d, when the valve core 3 is positioned at the right end of the valve hole 22, the oil inlet hole 2e is communicated with right oil holes 2f and 2h through the second ring groove 3e, the left oil holes 2g and 2i are communicated with the third ring groove 3d through the first ring groove 3g and the first oil holes 3b, 3a and 3c, and the third ring groove 3d is disconnected with the right oil holes 2f and 2 h; when the valve core 3 is positioned at the left end of the valve hole 22, the oil inlet hole 2e communicates with the left oil holes 2g, 2i through the second ring groove 3e, the right oil holes 2f, 2h communicate with the third ring groove 3d, and the left oil holes 2g, 2i are disconnected from the first ring groove 3 g.
The valve control assembly comprises a right baffle ring 25, and the right baffle ring 25 is installed at the right end of the piston body 2 and is sleeved on the piston rod 3 j; a left control cavity 2m is formed between the left end of the valve core 3 and the bottom of the left end of the valve hole 22 in the valve hole 22, and a right control cavity 2n is formed between the right end of the valve core 3 and the right gear ring 25; a first damping hole 2q, 2r for communicating the left control cavity 2m with the right piston cavity 1b is arranged in the piston body 2; a left oil port 1a communicated with the port P is formed in the inner side wall of the mounting hole 101 on the left side of the port P, a left annular groove 2d is formed in the position, close to the left end cover 9, of the outer circumferential side face of the piston body 2, and a right annular groove 2c is formed in the position, close to the right end cover 4, of the outer circumferential side face of the piston body 2; the outer circumferential side surface of the piston body 2 is provided with a right communicating groove 2j for communicating the oil inlet groove 2a with the right ring groove 2 c; a left oil hole 2k used for communicating the left ring groove 2d with the left control cavity 2m and a right oil hole 2p used for communicating the right ring groove 2c with the right control cavity 2n are arranged in the piston body 2; when the piston body 2 is positioned at the right end of the mounting hole 101, the left oil port 1a communicates with the left ring groove 2 d.
A right inner annular groove 4a is formed in the right end cover 4 and on the outer side of the circumference of a piston rod 3j, a second oil hole 3i communicated with the left control cavity 2m is formed in the piston rod 3j, a right first oil hole 3h communicated with the second oil hole 3i and a right second oil hole 3f communicated with the first oil holes 3b, 3a and 3c are formed in the outer circumferential side face of the piston rod 3 j; when the piston body 2 is located at the left end of the mounting hole 101, the left control chamber 2m is communicated with the third ring groove 3d through the second oil hole 3i, the right first oil port 3h, the right inner ring groove 4a, the right second oil port 3f, and the first oil holes 3b, 3a, 3 c.
As shown in fig. 4, the hydraulic trimmer for greening of the present invention has a simple structure, when the hydraulic trimmer for greening of the present invention needs to be installed on a working vehicle, such as an excavator, etc., before working, the P port and the T port of the valve body are connected to a backup valve of the excavator for controlling hydraulic auxiliary equipment, when a pipeline of the hydraulic trimmer for greening of the present invention is connected, the hydraulic trimmer for greening is moved to a tree to be trimmed by using a mechanical arm of the excavator, so that oil can be introduced into the P port to start working, the position of fig. 6 is an initial position of a reciprocating cylinder of the hydraulic trimmer for greening, and after entering the P port, the oil enters into a left piston cavity 1c through an oil inlet tank 2a, an oil inlet hole 2e, a second annular groove 3e, a left oil hole 2g, 2i, the piston body 2 is pushed to move rightwards, oil in the right piston cavity 1b is discharged through a T port through the right oil holes 2h and 2f, the third ring groove 3d, the oil return hole 2g and the oil return groove 2b, and in the process, pressure oil at the P port enters the right control cavity 2n through the right communicating groove 2j, the right ring groove 2c and the right oil hole 2P, so that the piston body 2 is kept at the position relative to the valve core 3 shown in figure 6; the piston rod 3j extends out to drive the movable plate 5a connected with the piston rod 3j through the connecting plate 5a1 to move rightwards, and due to the matching of the movable teeth 5 on the movable plate 5a and the fixed teeth 6 on the fixed plate 6a, the movable teeth 5 generate shearing during movement, and the branch shearing section between the movable teeth 5 and the fixed teeth 6 can be formed; when the piston body 2 moves to the rightmost end, at the moment, hydraulic oil at a P port enters a left control cavity 2m through a left oil port 1a, a left annular groove 2d and a left oil hole 2k, because the cross-sectional area of the left control cavity 2m is larger than the annular cross-sectional area of a right control cavity 2n, under the condition that the pressures of the hydraulic oil in the left control cavity 2m and the right control cavity 2n are equal, one end of the left control cavity 2m is stressed greatly, the hydraulic oil pushes the valve core 3 to move rightwards to the state shown in figure 9, the hydraulic oil enters the P port and then enters a right piston cavity 1b through an oil inlet groove 2a, an oil inlet hole 2e, a second annular groove 3e, a right oil hole 2f and a right piston cavity 1b to push the piston body 2 to move leftwards, the hydraulic oil in the left piston cavity 1c is discharged through a T port by a left oil hole 2i and a left oil hole 2g, a first annular groove 3g, a first oil hole 3, in the process, pressure oil at the P port enters the right control cavity 2n1b and then enters the left control cavity 2m through the first damping holes 2q and 2r, so that the piston body 2 and the valve core 3 are kept at the relative positions shown in FIG. 9; the piston rod 3j retracts, the movable plate 5a is driven to move leftwards by the connecting plate 5a1, and due to the matching of the movable teeth 5 on the movable plate 5a and the fixed teeth 6 on the fixed plate 6a, the movable teeth 5 generate shearing during movement, and the branches between the movable teeth 5 and the fixed teeth 6 can be sheared; when the piston body 2 moves to the leftmost end, at the moment, the right inner annular groove 4a connects the right first oil port 3h and the right second oil port 3f as shown in fig. 10, at the moment, hydraulic oil at the position of the P port enters the right control cavity 2n through the right communicating groove 2j, the right annular groove 2c and the right first oil hole 2P, oil in the left control cavity 2m enters the T port through the second oil hole 3i, the right first oil port 3h, the right inner annular groove 4a, the right second oil port 3f, the first oil holes 3a, 3c, the third annular groove 3d, the oil return hole 2g and the oil return groove 2b, the oil pushes the valve core 3 to move leftwards as shown in fig. 6, after the hydraulic oil enters the P port, the hydraulic oil enters the left piston cavity 1c through the oil inlet groove 2a, the oil inlet hole 2e, the second annular groove 3e, the left oil hole 2g and the oil hole 2i to push the piston body 2 to move rightwards, and oil at the position of the right piston, The oil return hole 2g and the oil return groove 2b are discharged through a T port; the cycle is completed.
Because the movable teeth 5 are connected with the piston rod 3j through the movable plate 5a and the connecting plate 5a1, when the hydraulic power mechanism reciprocates, the movable teeth 5 are driven to do reciprocating impact motion, and the fixed teeth 6 are matched to realize shearing motion, so that the requirements of tree trimming work are met.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the technical principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.

Claims (6)

1. A hydraulic trimmer for environmental sanitation and greening is characterized by comprising a fixed plate, wherein a movable plate is connected to the fixed plate in a sliding manner, a row of fixed teeth are arranged on the side edge of the fixed plate along the length direction of the fixed plate, and a row of movable teeth matched with the fixed teeth are arranged on the side surface of the movable plate; the movable plate is characterized in that a housing is fixedly mounted on the fixed plate, a hydraulic power mechanism used for driving the movable plate to reciprocate on the fixed plate along the length direction of the movable plate is fixedly mounted on the left side of the housing, a connecting plate is arranged on the left side, close to the housing, of the movable plate, and a piston rod of the hydraulic power mechanism is fixedly connected with the connecting plate.
2. The hydraulic trimmer for environmental sanitation greening according to claim 1, wherein the hydraulic power mechanism comprises a valve block, a mounting hole is formed in the valve block and penetrates through the valve block along the moving direction of the movable plate, a left end cover is fixedly mounted at the left end of the mounting hole of the valve block, a right end cover is fixedly mounted at the right end of the mounting hole of the valve block, and the right end cover is fixedly mounted at the left side of the housing; the valve block is provided with a P port and a T port which are communicated with the mounting hole;
a piston body is connected in the mounting hole in a sliding manner, a guide sliding rod is arranged at an eccentric position between the left end cover and the right end cover, and a guide sliding hole matched with the guide sliding rod is formed in the piston body along the movement direction of the piston body; a left piston cavity is formed between the left side and the left end cover of the piston body in the mounting hole, and a right piston cavity is formed between the right side and the right end cover of the piston body in the mounting hole; a valve hole with an opening at the right end is formed in the piston body along the movement direction of the piston body, a valve core is connected in the valve hole in a sliding manner, a piston rod penetrating through a right end cover is arranged on the right side of the valve core in a rightward extending manner, and the right end of the piston rod is fixedly connected with a connecting plate;
an oil inlet groove communicated with the P port and an oil return groove communicated with the T port are formed in the piston body, and an oil inlet hole used for communicating the valve hole and the oil inlet groove and an oil return hole used for communicating the oil return groove and the valve hole are formed in the piston body; when the valve core is positioned at the left end of the valve hole, the left piston cavity is communicated with the oil inlet hole, and the right piston cavity is communicated with the oil return hole; when the valve core is positioned at the right end of the valve hole, the left piston cavity is communicated with the oil return hole, and the right piston cavity is communicated with the oil inlet hole;
the hydraulic power mechanism also comprises a valve control assembly for controlling the valve core to reciprocate left and right in the valve hole.
3. The hydraulic trimmer for environmental sanitation greening according to claim 2, wherein a right oil hole for communicating the valve hole and the right piston cavity and a left oil hole for communicating the valve hole and the left piston cavity are formed in the piston body; the side surface of the circumference of the valve core is provided with a first ring groove, a second ring groove and a third ring groove in sequence from left to right, the third ring groove is communicated with an oil return hole, a first oil hole for communicating the first ring groove and the third ring groove is arranged in the piston rod and the valve core, when the valve core is positioned at the right end of the valve hole, the oil inlet hole is communicated with the right oil hole through the second ring groove, the left oil hole is communicated with the third ring groove through the first ring groove and the first oil hole, and the third ring groove is disconnected with the right oil hole; when the valve core is positioned at the left end of the valve hole, the oil inlet hole is communicated with the left oil hole through the second annular groove, the right oil hole is communicated with the third annular groove, and the left oil hole is disconnected with the first annular groove.
4. The hydraulic trimmer for environmental sanitation greening according to claim 3, wherein the valve control assembly comprises a right stop ring, the right stop ring is mounted at the right end of the piston body and sleeved on the piston rod; a left control cavity is formed between the left end of the valve core and the bottom of the left end of the valve hole in the valve hole, and a right control cavity is formed between the right end of the valve core and the right gear ring; a first damping hole for communicating the left control cavity and the right piston cavity is formed in the piston body; a left oil port communicated with the P port is formed in the inner side wall of the mounting hole on the left side of the P port, a left annular groove is formed in the position, close to the left end cover, of the outer circumferential side face of the piston body, and a right annular groove is formed in the position, close to the right end cover, of the outer circumferential side face of the piston body; the side surface of the outer circumference of the piston body is provided with a right communicating groove for communicating the oil inlet groove and the right ring groove; a left oil hole for communicating the left ring groove with the left control cavity and a right oil hole for communicating the right ring groove with the right control cavity are formed in the piston body; when the piston body is located the right end of mounting hole, left hydraulic fluid port and left annular intercommunication.
5. The hydraulic trimmer for environmental sanitation greening according to claim 4, wherein a right inner ring groove is formed in the right end cover on the outer side of the circumference of a piston rod, a second oil hole communicated with the left control cavity is formed in the piston rod, a right first oil port communicated with the second oil hole and a right second oil port communicated with the first oil hole are formed in the side surface of the outer circumference of the piston rod; when the piston body is positioned at the left end of the mounting hole, the left control cavity is communicated with the third ring groove through the second oil hole, the right first oil hole, the right inner ring groove, the right second oil hole and the first oil hole.
6. The hydraulic trimming machine for environmental sanitation and greening according to claim 1, wherein the fixed plate is provided with a convex plate extending from both ends thereof, each convex plate is provided with a limiting sliding groove, and the movable plate is slidably connected in the two limiting sliding grooves.
CN201911390128.2A 2019-12-30 2019-12-30 Hydraulic trimmer for environmental sanitation and greening Withdrawn CN111011027A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201911390128.2A CN111011027A (en) 2019-12-30 2019-12-30 Hydraulic trimmer for environmental sanitation and greening

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201911390128.2A CN111011027A (en) 2019-12-30 2019-12-30 Hydraulic trimmer for environmental sanitation and greening

Publications (1)

Publication Number Publication Date
CN111011027A true CN111011027A (en) 2020-04-17

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
CN201911390128.2A Withdrawn CN111011027A (en) 2019-12-30 2019-12-30 Hydraulic trimmer for environmental sanitation and greening

Country Status (1)

Country Link
CN (1) CN111011027A (en)

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Application publication date: 20200417