阅读说明：本技术 一种带有防护组件的自动液压执行机构 (Automatic hydraulic actuating mechanism with protection component ) 是由 陆胂娟 于 2021-09-10 设计创作，主要内容包括：本发明涉及液压执行机构技术领域,具体的公开了一种带有防护组件的自动液压执行机构,包括底盘、液压油缸、液压油箱、油泵和单向阀,所述液压油缸和液压油箱均安装在底盘顶部,液压油箱通过输油管与液压油缸的进油口相连通,油泵和单向阀均设置在输油管上。本发明可根据其具体使用情况控制液压油缸的活塞杆伸缩长度,且缸筒内高温发热的液压油可通过输送软管和两位四通电磁阀进入油箱内,通过过滤板对液压油进行过滤,可在过滤中液压油中产生的气泡击碎,空气通过排气阀排出,避免液压油中含有气泡而影响液压油缸的举升力度,多个散热板可对液压油进行多次循环散热,保证通过油泵进入缸筒内的液压油的正常温度。(The invention relates to the technical field of hydraulic actuating mechanisms, and particularly discloses an automatic hydraulic actuating mechanism with a protective assembly. The telescopic length of the piston rod of the hydraulic oil cylinder can be controlled according to the specific use condition of the hydraulic oil cylinder, high-temperature heated hydraulic oil in the cylinder can enter the oil tank through the conveying hose and the two-position four-way electromagnetic valve, the hydraulic oil is filtered through the filter plate, bubbles generated in the hydraulic oil during filtering can be smashed, air is discharged through the exhaust valve, the lifting force of the hydraulic oil cylinder is prevented from being influenced due to the fact that the hydraulic oil contains the bubbles, the plurality of heat dissipation plates can conduct multiple-cycle heat dissipation on the hydraulic oil, and the normal temperature of the hydraulic oil entering the cylinder through the oil pump is guaranteed.)

1. An automatic hydraulic actuator with a protective assembly comprises a chassis (1), a hydraulic oil cylinder (6), a hydraulic oil tank (11), an oil pump (12) and a check valve (17), and is characterized in that the hydraulic oil cylinder (6) and the hydraulic oil tank (11) are both installed at the top of the chassis (1), the hydraulic oil tank (11) is communicated with an oil inlet of the hydraulic oil cylinder (6) through an oil conveying pipe (13), the oil pump (12) and the check valve (17) are both arranged on the oil conveying pipe (13), the top of the hydraulic oil tank (11) is communicated with a two-position four-way electromagnetic valve (14), an oil outlet of the hydraulic oil cylinder (6) is communicated with the two-position four-way electromagnetic valve (14) through a conveying hose, an exhaust assembly is arranged in the hydraulic oil tank (11), a cooling assembly is arranged on the outer wall of the hydraulic oil cylinder (6), and comprises a heat dissipation sleeve (20) fixedly sleeved on the outer wall of the hydraulic oil cylinder (6), the outer wall of the heat dissipation sleeve (20) is fixedly sleeved with a cooling sleeve (21), cavities are formed in the heat dissipation sleeve (20) and the cooling sleeve (21), cooling water is loaded in the cavities, the outer wall of the cooling sleeve (21) is sleeved with a heat dissipation fixing sleeve (5), a piston disc (23) is sleeved in the cavity of the heat dissipation sleeve (20) in a sliding mode, the tail end of a piston rod of a hydraulic oil cylinder (6) is fixedly connected with a second connecting disc (9), a connecting rod (8) is fixed at the bottom of the second connecting disc (9), the bottom end of the connecting rod (8) penetrates through the heat dissipation sleeve (20) and is fixedly connected with the top of the piston disc (23) in the cavity of the heat dissipation sleeve (20), the cavities of the heat dissipation sleeve (20) and the cooling sleeve (21) are communicated through two conveying ports, a first valve (22) and a second valve (24) are installed in the two conveying ports respectively, the second valve (24) is located above the first valve (22), the piston disc (23) is positioned between the first valve (22) and the second valve (24), and the outer wall of the hydraulic oil cylinder (6) is provided with a protective component.

2. The automatic hydraulic actuator with a protection component according to claim 1, wherein the exhaust component comprises a filter plate (19) fixed on the inner wall of the hydraulic oil tank (11), two exhaust holes are formed at the top of the hydraulic oil tank (11), exhaust valves (15) are installed in the two exhaust holes, and hydraulic oil is loaded in the hydraulic oil tank (11).

3. The automatic hydraulic actuator with the protection component according to claim 2, wherein a plurality of heat dissipation plates are sequentially fixed on the inner wall of the hydraulic oil tank (11) in a staggered manner from top to bottom, the heat dissipation plates are positioned below the filter plate (19), and the communication position of the oil delivery pipe (13) and the hydraulic oil tank (11) is positioned below the heat dissipation plates.

4. The automatic hydraulic actuator with the protection component according to claim 1, characterized in that the protection component comprises a first connecting disc (7) fixedly sleeved on the outer wall of the hydraulic oil cylinder (6), the first connecting disc (7) is positioned above the heat dissipation sleeve (20) and the cooling sleeve (21), a corrugated sheath (18) is fixed between the first connecting disc (7) and the second connecting disc (9), a piston rod of the hydraulic oil cylinder (6) and a connecting rod (8) are both positioned in the corrugated sheath (18), and the connecting rod (8) penetrates through the first connecting disc (7) and is in sliding connection with the first connecting disc (7).

5. The automatic hydraulic actuator with the protection assembly according to claim 4, wherein a protection plate (16) is fixedly connected to the tail end of a piston rod of the hydraulic oil cylinder (6), the protection plate (16) is fixed to the bottom of the second connecting disc (9), grooves are formed in the outer walls of the first connecting disc (7) and the second connecting disc (9), and the corrugated protective sleeve (18) is fixed in the grooves through a steel binding tape.

6. The automatic hydraulic actuator with the protection assembly according to claim 4, wherein the first connecting disc (7) is provided with a circular opening matched with the hydraulic oil cylinder (6), the second connecting disc (9) is provided with a plurality of connecting holes, and the chassis (1) is provided with a circle of mounting holes.

7. The automatic hydraulic actuator with the protection assembly according to claim 1, wherein a protection shell (2) is fixed to the top of the chassis (1), a plurality of heat dissipation holes are formed in the protection shell (2), the hydraulic oil cylinder (6) and the hydraulic oil tank (11) are located in the protection shell (2), a top plate (3) is fixed to the top of the protection shell (2), the hydraulic oil cylinder (6) penetrates through the top plate (3), a through hole is formed in the top plate (3), a pipe sleeve (4) is installed in the through hole, the conveying hose is located in the pipe sleeve (4), a reinforcing plate (10) is fixed to the top of the chassis (1), a mounting hole is formed in the reinforcing plate (10), and the hydraulic oil cylinder (6) is fixedly installed at the top of the chassis (1) through the mounting hole.

Technical Field

The invention relates to the technical field of hydraulic actuating mechanisms, in particular to an automatic hydraulic actuating mechanism with a protection assembly.

Background

The hydraulic transmission is one of transmission modes, the hydraulic transmission takes liquid as a working medium, power is transmitted by utilizing the pressure energy of the liquid, a complete hydraulic system consists of five parts, namely a power source device, an executing device, a control and regulation device, an auxiliary device and a liquid medium, and the executing elements (a hydraulic cylinder and a hydraulic motor) of the hydraulic system are used for converting the pressure energy of the liquid into mechanical energy so as to obtain required linear reciprocating motion or rotary motion.

The hydraulic actuating mechanism can be applied to a hydraulic actuating mechanism to provide lifting action in equipment such as a hydraulic dump truck and a hydraulic elevator, and a multi-purpose hydraulic cylinder of the hydraulic actuating mechanism is used as an actuating element to provide lifting force.

Disclosure of Invention

The invention aims to solve the defects in the prior art and provides an automatic hydraulic actuator with a protection assembly.

In order to achieve the purpose, the invention adopts the following technical scheme:

an automatic hydraulic actuator with a protective component comprises a chassis, a hydraulic oil cylinder, a hydraulic oil tank, an oil pump and a one-way valve, wherein the hydraulic oil cylinder and the hydraulic oil tank are both arranged at the top of the chassis, the hydraulic oil tank is communicated with an oil inlet of the hydraulic oil cylinder through an oil conveying pipe, the oil pump and the one-way valve are both arranged on the oil conveying pipe, the top of the hydraulic oil tank is communicated with a two-position four-way solenoid valve, an oil outlet of the hydraulic oil cylinder is communicated with the two-position four-way solenoid valve through a conveying hose, an exhaust component is arranged in the hydraulic oil tank, a cooling component is arranged on the outer wall of the hydraulic oil cylinder, the cooling component comprises a heat dissipation sleeve fixedly sleeved on the outer wall of the hydraulic oil cylinder, a cooling sleeve is fixedly sleeved on the outer wall of the heat dissipation sleeve, cavities are respectively formed in the heat dissipation sleeve and the cooling sleeve, cooling water is loaded in the cavities, a heat dissipation fixed sleeve is sleeved on the outer wall of the cooling sleeve, and a piston disc is slidably sleeved in the cavities of the heat dissipation sleeve, the terminal rigid coupling of hydraulic cylinder's piston rod has the second connection pad, second connection pad bottom is fixed with the connecting rod, the connecting rod bottom run through the heat dissipation sleeve pipe and with the piston dish top rigid coupling in the sheathed tube cavity of dispelling the heat, the heat dissipation sleeve pipe is linked together through two delivery ports with cooling jacket's cavity, install first valve and second valve in two delivery ports respectively, the second valve is located first valve top, the piston dish is located between first valve and the second valve, the hydraulic cylinder outer wall is provided with the protection component.

Preferably, the exhaust assembly comprises a filter plate fixed on the inner wall of the hydraulic oil tank, two exhaust holes are formed in the top of the hydraulic oil tank, exhaust valves are installed in the two exhaust holes, and hydraulic oil is loaded in the hydraulic oil tank.

Preferably, the hydraulic tank inner wall top-down is crisscross fixed with a plurality of heating panels in proper order, and the heating panel is located the filter below, and defeated oil pipe is located the heating panel below with the intercommunication department of hydraulic tank.

Preferably, the protection assembly comprises a first connecting disc fixedly sleeved on the outer wall of the hydraulic oil cylinder, the first connecting disc is located above the heat dissipation sleeve and the cooling sleeve, a corrugated sheath is fixed between the first connecting disc and the second connecting disc, a piston rod and a connecting rod of the hydraulic oil cylinder are both located in the corrugated sheath, and the connecting rod penetrates through the first connecting disc and is in sliding connection with the first connecting disc.

Preferably, the tail end of a piston rod of the hydraulic oil cylinder is fixedly connected with a guard plate, the guard plate is fixed to the bottom of the second connecting disc, grooves are formed in the outer walls of the first connecting disc and the second connecting disc, and the corrugated sheath is fixed in the grooves through steel ribbons.

Preferably, the first connecting disc is provided with a circular opening matched with the hydraulic oil cylinder, the second connecting disc is provided with a plurality of connecting holes, and the chassis is provided with a circle of mounting holes.

Preferably, the chassis top is fixed with a plurality of louvres on protective housing and the protective housing, and hydraulic cylinder and hydraulic tank all are located the protective housing, and the protective housing top is fixed with the top dish, and hydraulic cylinder runs through the top dish, has seted up the through-hole on the top dish, installs the pipe box in the through-hole, and the conveying hose is located the pipe box, and the chassis top is fixed with the reinforcing plate, has seted up the installing port on the reinforcing plate, and hydraulic cylinder passes through installing port fixed mounting at the chassis top.

Compared with the prior art, the invention has the beneficial effects that:

1: according to the hydraulic oil cylinder, hydraulic oil with normal temperature in the oil tank can be conveyed into the cylinder barrel through the check valve and the oil conveying pipe, the piston rod is lifted by the hydraulic oil through the piston in the extrusion cylinder barrel, the piston rod can be controlled to stretch through the two-position four-way electromagnetic valve, the stretching length of the piston rod of the hydraulic oil cylinder is controlled according to the specific use condition of the hydraulic oil cylinder, the hydraulic oil with high temperature and heat in the cylinder barrel can enter the oil tank through the conveying hose and the two-position four-way electromagnetic valve, the hydraulic oil is filtered through the filter plate, bubbles generated in the hydraulic oil during filtering can be broken, air is discharged through the exhaust valve, the lifting force of the hydraulic oil cylinder is prevented from being influenced by the bubbles in the hydraulic oil, the hydraulic oil can be subjected to multiple-cycle heat dissipation through the plurality of heat dissipation plates, and the temperature of the hydraulic oil entering the cylinder barrel through the oil pump is guaranteed to be within a normal usable range.

2: according to the invention, when the piston rod of the hydraulic oil cylinder drives the second connecting disc to ascend, the piston disc in the cavity of the heat dissipation sleeve can be driven to ascend, cooling water in the cooling sleeve can be extracted into the cavity of the heat dissipation sleeve to absorb heat for the outer wall of the hydraulic oil cylinder, when the second connecting disc moves downwards, the cooling water which absorbs heat of the hydraulic oil cylinder is compressed into the cavity of the cooling sleeve to dissipate heat for the cooling water through the heat dissipation fixing sleeve, the cooling water absorbs heat for cooling the hydraulic oil cylinder along with the movement of the piston rod of the hydraulic oil cylinder, the continuous service life of the hydraulic oil cylinder can be prolonged, the heat dissipation sleeve is fixedly sleeved on the outer wall of the hydraulic oil cylinder to provide a protection effect for the hydraulic oil cylinder, the phenomenon that foreign matters collide the outer wall of the hydraulic oil cylinder to cause oil leakage is avoided, and the protection performance of the hydraulic oil cylinder is improved.

3: the corrugated sheath can prevent impurities such as dust and the like from entering a gap between the hydraulic oil cylinder and the piston rod to influence the normal use of the hydraulic oil cylinder, prevent the dust from falling on the piston rod of the hydraulic oil cylinder to cause the dust to be brought into the cylinder barrel to pollute the hydraulic oil when the piston rod retracts, and prevent the lifting force of the hydraulic oil cylinder from being influenced by friction force increased at the joint of the piston rod and the cylinder barrel due to the impurities such as the dust and the like.

Drawings

FIG. 1 is an isometric view of an automatic hydraulic actuator with a guard assembly in accordance with the present invention;

FIG. 2 is a cross-sectional view of an automatic hydraulic actuator with a shield assembly in accordance with the present invention;

FIG. 3 is an enlarged view of a portion A of FIG. 2;

FIG. 4 is a front cross-sectional view of an automatic hydraulic actuator with a shield assembly in accordance with the present invention;

FIG. 5 is a partial enlarged view of portion B of FIG. 4;

FIG. 6 is an enlarged view of a portion C of FIG. 4;

FIG. 7 is a schematic structural diagram of a first connecting disc and a second connecting disc of an automatic hydraulic actuator with a protective assembly according to the present invention;

fig. 8 is a schematic structural diagram of a protective casing of an automatic hydraulic actuator with a protective assembly according to the present invention.

In the figure: 1. a chassis; 2. a protective shell; 3. a top tray; 4. pipe sleeve; 5. a heat dissipation fixing sleeve; 6. a hydraulic cylinder; 7. a first splice tray; 8. a connecting rod; 9. a second connecting disc; 10. a reinforcing plate; 11. a hydraulic oil tank; 12. an oil pump; 13. an oil delivery pipe; 14. a two-position four-way solenoid valve; 15. an exhaust valve; 16. a guard plate; 17. a one-way valve; 18. a corrugated sheath; 19. a filter plate; 20. a heat-dissipating sleeve; 21. cooling the sleeve; 22. a first valve; 23. a piston disc; 24. a second valve.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.

Referring to fig. 1-8, an automatic hydraulic actuator with a protective assembly comprises a chassis 1, a hydraulic oil cylinder 6, a hydraulic oil tank 11, an oil pump 12 and a check valve 17, wherein the hydraulic oil cylinder 6 and the hydraulic oil tank 11 are both installed at the top of the chassis 1, the hydraulic oil tank 11 is communicated with an oil inlet of the hydraulic oil cylinder 6 through an oil conveying pipe 13, the oil pump 12 and the check valve 17 are both arranged on the oil conveying pipe 13, the top of the hydraulic oil tank 11 is communicated with a two-position four-way electromagnetic valve 14, an oil outlet of the hydraulic oil cylinder 6 is communicated with the two-position four-way electromagnetic valve 14 through a conveying hose, an exhaust assembly is arranged in the hydraulic oil tank 11, a cooling assembly is arranged on the outer wall of the hydraulic oil cylinder 6, the cooling assembly comprises a heat dissipation sleeve 20 fixedly sleeved on the outer wall of the hydraulic oil cylinder 6, a cooling sleeve 21 is fixedly sleeved on the outer wall of the heat dissipation sleeve 20, cavities are both arranged in the heat dissipation sleeve 20 and the cooling sleeve 21, and are loaded with cooling water, the outer wall cover of cooling jacket 21 is equipped with the fixed cover 5 of heat dissipation, sliding sleeve has connected piston disc 23 in heat dissipation sleeve 20's the cavity, hydraulic cylinder 6's the terminal rigid coupling of piston rod has second connection pad 9, second connection pad 9 bottom is fixed with connecting rod 8, 8 bottoms of connecting rod run through heat dissipation sleeve 20 and with the piston disc 23 top rigid coupling in heat dissipation sleeve 20's the cavity, heat dissipation sleeve 20 and cooling jacket 21's cavity are linked together through two delivery ports, install first valve 22 and second valve 24 in two delivery ports respectively, second valve 24 is located first valve 22 top, piston disc 23 is located between first valve 22 and the second valve 24, hydraulic cylinder 6 outer wall is provided with the protection component.

As a technical optimization scheme of the invention, the exhaust assembly comprises a filter plate 19 fixed on the inner wall of the hydraulic oil tank 11, the filter plate 19 can filter hydraulic oil returned to the oil tank 11 through a conveying hose, air bubbles in the hydraulic oil can be crushed, and the influence of the air bubbles in the hydraulic oil on the normal use of the hydraulic oil cylinder 6 is avoided, the top of the hydraulic oil tank 11 is provided with two exhaust holes, exhaust valves 15 are respectively arranged in the two exhaust holes, the air bubbles crushed by the filter plate 19 can be exhausted out of the oil tank 11 through the two exhaust valves 15, and the hydraulic oil tank 11 is filled with hydraulic oil.

As a technical optimization scheme of the invention, a plurality of heat dissipation plates are sequentially fixed on the inner wall of the hydraulic oil tank 11 in a staggered manner from top to bottom, the heat dissipation plates are positioned below the filter plate 19, the communication part of the oil delivery pipe 13 and the hydraulic oil tank 11 is positioned below the heat dissipation plates, and the plurality of heat dissipation plates can perform multiple circulating heat dissipation on hydraulic oil so as to ensure the normal temperature of the hydraulic oil entering the cylinder barrel through the oil pump 12 in the oil tank 11.

As a technical optimization scheme of the invention, the protective component comprises a first connecting disc 7 fixedly sleeved on the outer wall of the hydraulic oil cylinder 6, the first connecting disc 7 is positioned above a heat dissipation sleeve 20 and a cooling sleeve 21, a corrugated sheath 18 is fixed between the first connecting disc 7 and a second connecting disc 9, a piston rod of the hydraulic oil cylinder 6 and a connecting rod 8 are both positioned in the corrugated sheath 18, the connecting rod 8 penetrates through the first connecting disc 7 and is in sliding connection with the first connecting disc 7, the corrugated sheath 18 can prevent impurities such as dust and the like from entering a gap between the hydraulic oil cylinder 6 and the piston rod to influence the normal use of the hydraulic oil cylinder 6, prevent dust from falling on the piston rod of the hydraulic oil cylinder 6 to cause the dust to be brought into the cylinder barrel to pollute the hydraulic oil when the piston rod retracts, and the lifting force of the hydraulic oil cylinder 6 can be prevented from being influenced by the friction force increased at the joint of the piston rod and the cylinder barrel due to impurities such as dust and the like.

As a technical optimization scheme of the invention, the tail end of a piston rod of the hydraulic oil cylinder 6 is fixedly connected with a protective plate 16, the protective plate 16 is fixed at the bottom of the second connecting disc 9, the outer walls of the first connecting disc 7 and the second connecting disc 9 are both provided with grooves, the corrugated sheath 18 is fixed in the grooves through a steel ribbon, the corrugated sheath 18 can be conveniently fixedly connected to the outer walls of the first connecting disc 7 and the second connecting disc 9 through the steel ribbon through the grooves formed in the outer walls of the first connecting disc 7 and the second connecting disc 9, and the corrugated sheath 18 can be prevented from loosening through the grooves.

As a technical optimization scheme of the invention, a round opening matched with the hydraulic oil cylinder 6 is formed in the first connecting disc 7, a plurality of connecting holes are formed in the second connecting disc 9, and a circle of mounting holes are formed in the chassis 1 and can facilitate the fixed mounting of the chassis 1.

As a technical optimization scheme of the invention, a protective shell 2 is fixed on the top of a chassis 1, a plurality of heat dissipation holes are formed in the protective shell 2, the protective shell 2 can prevent sundries and the like from touching a cooling sleeve 21 by mistake, a heat dissipation sleeve 20, an oil tank 11 and a hydraulic oil cylinder 6, the protection effect on the hydraulic oil cylinder 6 and internal parts of the hydraulic oil cylinder is improved, the hydraulic oil cylinder 6 and the hydraulic oil tank 11 are both positioned in the protective shell 2, a top plate 3 is fixed on the top of the protective shell 2, the hydraulic oil cylinder 6 penetrates through the top plate 3, a through hole is formed in the top plate 3, a pipe sleeve 4 is installed in the through hole, a conveying hose is positioned in the pipe sleeve 4, a reinforcing plate 10 is fixed on the top of the chassis 1, a mounting port is formed in the reinforcing plate 10, and the hydraulic oil cylinder 6 is fixedly installed on the top of the chassis 1 through the mounting port.

When the device is used, the device is fixedly arranged at a required installation position through a circle of installation holes formed in a chassis 1, a bearing plate to be lifted is arranged on a second connection disc 9, an oil pump 12 is started, the oil pump 12 can pump hydraulic oil in an oil tank 11 into an oil delivery pipe 13, the hydraulic oil enters a cylinder barrel of a hydraulic oil cylinder 6 through a one-way valve 17 and the oil delivery pipe 13, the hydraulic oil pushes a piston in the hydraulic oil cylinder 6 to move upwards so as to enable the piston rod to move upwards to complete lifting action, a two-position four-way electromagnetic valve 14 on a conveying hose is used for controlling the output quantity of the hydraulic oil in the hydraulic oil cylinder 6, so that the extension length of the piston rod of the hydraulic oil cylinder 6 is controlled, the extension length of the piston rod of the hydraulic oil cylinder 6 can be controlled according to specific use conditions, the hydraulic oil in the hydraulic oil cylinder 6 can enter the oil tank 11 again through the conveying hose and the two-position four-way electromagnetic valve 14, the filter plate 19 fixed on the inner wall of the oil tank 11 can break air bubbles in hydraulic oil to prevent the hydraulic oil from containing the air bubbles to influence the normal use of the hydraulic oil cylinder 6, the air bubbles broken by the filter plate 19 can be discharged out of the oil tank 11 through the two exhaust valves 15, the hydraulic oil without the air bubbles flows on the plurality of heat dissipation plates until flowing to the inner bottom wall of the oil tank 11, when the hydraulic oil flows on the heat dissipation plates, the heat dissipation plates can dissipate heat of the hydraulic oil for multiple cycles, the temperature of the hydraulic oil flowing to the inner bottom wall of the oil tank 11 can be ensured to be within the normal use range of the hydraulic oil cylinder 6, and when a piston rod of the hydraulic oil cylinder 6 pushes the second connection plate 9 to ascend, the second connection plate 9 can drive the connection rod 8 to ascend, the connection rod 8 drives the piston plate 23 in the cavity of the heat dissipation sleeve 20 to move upwards, and simultaneously the cooling water in the cavity of the cooling sleeve 21 is pumped into the cavity of the heat dissipation sleeve 20 through the first valve 22 below to enter the outer wall of the hydraulic oil cylinder 6 The cooling water after absorbing the heat of the hydraulic oil cylinder is compressed into the cavity of the cooling sleeve 21 to dissipate the heat of the cooling water through the heat dissipation fixing sleeve 5 when the second connecting disc 9 moves downwards, meanwhile, the cooling water in the cooling sleeve 21 can be pumped into the cavity of the heat dissipation sleeve 20 through the second valve above to absorb the heat of the outer wall of the hydraulic oil cylinder 6, the cooling water absorbs the heat of the hydraulic oil cylinder 6 along with the movement of the piston rod of the hydraulic oil cylinder 6, the continuous use duration of the hydraulic oil cylinder 6 can be prolonged, the cooling water in the cooling sleeve 21 can be pumped to absorb the heat of the outer wall of the hydraulic oil cylinder 6 when the piston rod of the hydraulic oil cylinder 6 extends out or retracts back, the cooling water can be automatically dissipated and cooled, the cooling effect of the cooling water is ensured, the hydraulic oil cylinder 6 is ensured to be at the optimal operation temperature constantly, and the problem that the cylinder barrel and the hydraulic oil of the hydraulic oil are difficult to use due to high temperature heating caused by frequent lifting actions is avoided, the heat dissipation sleeve 5 is fixedly sleeved on the outer wall of the hydraulic oil cylinder 6 to provide a protection effect for the hydraulic oil cylinder 6, so that the oil leakage phenomenon caused by collision of foreign matters on the outer wall of the hydraulic oil cylinder 6 is avoided, the protection performance of the hydraulic oil cylinder 6 is improved, the corrugated sheath 18 can prevent dust and other impurities from entering a gap between the hydraulic oil cylinder 6 and a piston rod to influence the normal use of the hydraulic oil cylinder 6, prevent dust from falling on the piston rod of the hydraulic oil cylinder 6 to cause dust to be brought into the cylinder barrel to pollute hydraulic oil when the piston rod retracts, and prevent friction force at the joint of the piston rod and the cylinder barrel from increasing due to the dust and other impurities from influencing the lifting force of the hydraulic oil cylinder, the corrugated sheath 18 can prevent the piston rod from being sunk or deformed due to the collision of the foreign matters on the piston rod to influence the telescopic precision of the hydraulic oil cylinder 6, and ensure that the hydraulic oil cylinder 6 and the piston rod thereof are in an optimal matching motion state all the time, the corrugated sheath 18 stretches along with the stretching of the piston rod, and the connecting rod 8 can avoid interference between the corrugated sheath 18 and the piston rod of the hydraulic oil cylinder 6, so that the piston rod of the hydraulic oil cylinder 6 is protected.

The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.