CN211039254U - Hydraulic cylinder cooling structure and hydraulic cylinder with same - Google Patents

Abstract

The utility model provides a pneumatic cylinder cooling structure, including the water-cooling board, the water-cooling board includes flange and endotheca. The flange and the inner sleeve are respectively provided with a middle through hole I and a middle through hole II along the thickness direction, and the middle through hole I is a step hole and comprises an axial step surface and a radial step surface. The inner sleeve is embedded in the middle through hole I and is matched with the middle through hole I. The flange comprises at least one water inlet, the inner sleeve comprises at least one water outlet, and the water outlet is communicated with the middle through hole II. A cooling water channel is arranged between the flange and the inner sleeve and is communicated with the water inlet and the water outlet. The utility model also provides an use above-mentioned pneumatic cylinder cooling structure's pneumatic cylinder. The application provides a pneumatic cylinder cooling structure can effectively reduce the operating temperature of pneumatic cylinder, prolongs the life of pneumatic cylinder.

Description

Hydraulic cylinder cooling structure and hydraulic cylinder with same

Technical Field

The utility model relates to a pneumatic cylinder cooling field especially relates to a pneumatic cylinder cooling structure and have pneumatic cylinder of this structure.

Background

The existing hydraulic cylinder has a working mechanism of converting hydraulic energy into mechanical energy and is widely applied to various hydraulic systems. But the pneumatic cylinder often need be in under the high temperature environment when using, for example under high temperature steel billet environment, the heat can conduct to pneumatic cylinder oil blanket department along the piston rod, and this can accelerate the oil blanket ageing, leads to the pneumatic cylinder oil leak phenomenon frequently to appear, if hydraulic oil falls on the steel billet, still arouses the accident of catching fire easily. If the sealing of hydro-cylinder damages, the piston rod will with cylinder body direct contact, can make piston rod and front end housing damaged by the fish tail, cause the life of pneumatic cylinder to reduce, frequently change the pneumatic cylinder can cause manufacturing cost to improve greatly to change the pneumatic cylinder and need a large amount of manpowers and time, still can cause production efficiency's reduction. The temperature of the hydraulic oil can rise along with the temperature rise, the high-temperature hydraulic oil is easy to corrode hydraulic cylinder devices, and the hydraulic cylinder cannot accurately transmit power due to the reduction of viscosity, so that the normal use of mechanical equipment is influenced.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a pneumatic cylinder cooling structure and have pneumatic cylinder of this structure effectively reduce the operating temperature of pneumatic cylinder, prolong the life of pneumatic cylinder.

To achieve the above and other related objects, one embodiment of the present invention provides a hydraulic cylinder cooling structure, including a water cooling plate, the water cooling plate including a flange and an inner sleeve; the flange and the inner sleeve are respectively provided with a middle through hole I and a middle through hole II along the thickness direction, and the middle through hole I is a step hole and comprises an axial step surface and a radial step surface; the inner sleeve is embedded in the middle through hole I and matched with the middle through hole I; the flange comprises at least one water inlet, the inner sleeve comprises at least one water outlet, and the water outlet is communicated with the middle through hole II; a cooling water channel is arranged between the flange and the inner sleeve and is communicated with the water inlet and the water outlet.

Optionally, the inner sleeve comprises an outer circumferential groove communicated with the water outlet hole, and the outer circumferential groove is matched with the flange to form the cooling water channel.

Optionally, the flange includes an inner circumferential groove communicating with the water inlet, which cooperates with the inner sleeve to form the cooling water passage.

Optionally, the inner sleeve includes an outer circumferential groove and the flange includes an inner circumferential groove, the outer circumferential groove and the inner circumferential groove cooperating to form the cooling water passage.

Preferably, the outer circumferential surface of the inner sleeve comprises a step surface, and the step surface of the inner sleeve and the step surface of the flange are matched to form at least part of the cooling water channel.

Preferably, the contact part of the inner sleeve and the flange is provided with a sealing structure.

Further, the sealing structure includes a rubber gasket.

The utility model also provides a hydraulic cylinder, including cylinder body subassembly and piston assembly, the cylinder body subassembly includes the front end housing, still includes above-mentioned pneumatic cylinder cooling structure, and the water-cooling board is fixed on the front end cover of pneumatic cylinder.

Preferably, a threaded through hole is formed in a flange of the water cooling plate, a threaded blind hole matched with the threaded through hole is formed in the front end cover, and the water cooling plate is fixed to the front end cover through bolts.

The utility model provides a pair of hydraulic cylinder cooling structure cools down the pneumatic cylinder body through the water-cooling board to the cooling water through water-cooling board delivery port exhaust waters the cooling to the piston rod, can effectively reduce the operating temperature of pneumatic cylinder, prolongs the life of pneumatic cylinder, improves production efficiency, reduction in production cost.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a schematic view of a cooling structure in a first embodiment of the present invention;

Fig. 2 is a perspective view of a water-cooled plate according to an embodiment of the present invention;

FIG. 3 is a top view of a water-cooled plate according to an embodiment of the present invention;

3 FIG. 3 4 3 is 3 a 3 sectional 3 perspective 3 view 3 of 3 a 3 water 3- 3 cooled 3 plate 3 A 3- 3 A 3 according 3 to 3 an 3 embodiment 3 of 3 the 3 present 3 invention 3; 3

3 FIG. 3 5 3 is 3 a 3 sectional 3 side 3 view 3 of 3 a 3 water 3- 3 cooled 3 plate 3 A 3- 3 A 3 according 3 to 3 an 3 embodiment 3 of 3 the 3 present 3 invention 3; 3

FIG. 6 is a top view of a flange of a water cooling plate according to an embodiment of the present invention;

FIG. 7 is a sectional side view of a water cooled panel flange B-B according to an embodiment of the present invention;

FIG. 8 is a top view of the inner sleeve of the water cooling plate according to the first embodiment of the present invention;

FIG. 9 is a side view of a cross section of a C-C inner sleeve of a water cooling plate according to an embodiment of the present invention;

Fig. 10 is a sectional view of a water-cooling plate according to a second embodiment of the present invention;

Fig. 11 is a sectional view of a water-cooling plate in the third embodiment of the present invention.

Illustration of the drawings: 1. an anterior earring; 2. a water-cooling plate; 3. a cylinder barrel; 4. a rear end cap; 5. a piston; 6. a piston rod; 7. a front end cover; 8. fixing the screw rod; 9. a flange; 91. a water inlet; 92. a middle through hole I; 93. a threaded through hole; 94. an axial step surface I; 95. a radial step surface II; 96. an axial step surface III; 97. a radial step surface IV; 98. an axial step surface V; 99. an inner circumferential groove; 10. an inner sleeve; 101. a middle through hole II; 102 an annular body; 103. a water outlet; 104. an axial step surface a; 105. a radial step surface b; 106. an axial step surface c; 107. a radial step surface d; 108. an axial step surface e; 109. an outer circumferential groove; 11. a cooling water passage; 12. a cavity A; 13. and a cavity B.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

The first embodiment is as follows:

Fig. 1 is a schematic view illustrating a cooling structure in use according to an embodiment, and as shown in the drawing, the hydraulic cylinder in this embodiment includes a cylinder block assembly and a piston assembly, the cylinder block assembly includes a cylinder tube 3, a rear end cover 4 and a front end cover 7, and the piston assembly includes a front ear ring 1, a piston 5 and a piston rod 6. As shown in the figure, one end of a piston rod 6 penetrates through a front end cover 7 to extend outwards to be connected with a front ear ring 1, the other end of the piston rod is positioned in a cylinder barrel 3 and is connected with a piston 5, the piston 5 and the cylinder barrel 3 limit the piston rod 6 to do linear motion, and the piston 5 is used for separating a cavity A from a cavity B. The piston rod 6 is sealed with the cylinder body oil seal to prevent hydraulic oil from leaking. When the hydraulic cylinder works, hydraulic oil enters from the cavity A, the piston 5 is pushed to drive the piston rod 6 to extend out of the cylinder body, the hydraulic oil enters from the cavity B, the piston 5 is pushed to drive the piston rod 6 to retract, and therefore hydraulic energy is converted into mechanical energy.

The cooling structure includes a water-cooling plate 2 and a fixing device, the fixing device may be a fixing screw 8 or a fixing fixture, as shown in fig. 1, in this embodiment, the water-cooling plate 2 is fixed on a front end cover 7 of the hydraulic cylinder through the fixing screw 8, so that the piston rod 6 passes through one end of the front end cover 7 and then passes through the water-cooling plate 2 to extend outward, and in other embodiments, the water-cooling plate 2 may be directly fixed on the front end cover 7 of the hydraulic cylinder by welding or the like.

Fig. 2-5 are schematic structural views of the water-cooling plate 2 according to the first embodiment, in which the water-cooling plate 2 includes a flange 9 and an inner sleeve 10, and the flange 9 and the inner sleeve are combined with each other to form the water-cooling plate 2 having a water inlet 91 and a water outlet 103. Fig. 6 and 7 are schematic structural views of the flange 9, and in the embodiment, the flange 9 includes a rectangular plate-shaped main body and a circular middle through hole i 92 arranged along the thickness direction of the main body, and in other embodiments, the middle through hole i can be designed into other suitable shapes. The middle through hole I92 is a stepped hole and comprises an axial stepped surface I94, a radial stepped surface II 95, an axial stepped surface III 96, a radial stepped surface IV 97 and an axial stepped surface V98, and the stepped surfaces I-V are sequentially connected with one another and form a certain angle. The flange 9 further comprises 4 threaded through holes 93 surrounding the middle through hole I92, and the threaded through holes 93 are matched with the fixing screw rods 8 to fix the water cooling plate 2 on the front end cover 7 of the hydraulic cylinder. In this embodiment, the water inlet 91 of the water cooling plate 2 is disposed on the flange 9, and as shown in fig. 5, the water inlet 91 is disposed on one side of the rectangular plate-shaped main body of the flange 9 and is communicated with the axial step surface iii 96 of the middle through hole 92 i. Preferably, the inner wall of the water inlet 91 is provided with threads, so that the water inlet pipe and the water inlet 91 can be conveniently fixed with each other through the threads. In other embodiments, the plate-shaped body of the flange 9 may be circular or have other shapes, and the water inlet 91 may be provided in plurality.

The inner sleeve 10 is an annular structure matched with the middle through hole I and comprises a middle through hole II 101, an annular main body 102 and a water outlet 103, wherein the annular main body 102 can be designed into a circular shape matched with the middle through hole I or other suitable shapes. As shown in fig. 8 and fig. 9, the inner sleeve 10 has a circular through hole ii 101, a circular main body 102, and a stepped main body 102, wherein the stepped main body 102 includes an axial stepped surface a104, a radial stepped surface b105, an axial stepped surface c106, a radial stepped surface d107, and an axial stepped surface e108, and the stepped surfaces a-e are sequentially connected to each other and form a certain angle. In this embodiment, the inner sleeve 10 further includes 12 water outlets 103, and the water outlets 103 are disposed on the axial step surface c106 and penetrate through the annular main body 102 to communicate with the middle through hole ii 101. The diameter of the middle through hole II 101 is larger than that of the piston rod 6. Preferably, the corners of the flange 9 and the inner sleeve 10 are provided with chamfers.

As shown in fig. 2 to 9, when the flange 9 and the inner sleeve 10 are mounted, the inner sleeve 10 is inserted into the intermediate through hole i 92 of the flange 9, the axial step surface i 94 and the radial step surface ii 95 are respectively in contact with the axial step surface a104 and the radial step surface b105, and the radial step surface iv 97 and the axial step surface v 98 are respectively in contact with the radial step surface d107 and the axial step surface e 108. Preferably, a sealing device, such as a rubber gasket, is disposed at the contact position of the two radial step surfaces. A gap is reserved between the axial step surface III 96 and the axial step surface c106, an annular cavity is formed by the gap, part of the radial step surface II 95 and the radial step surface d107, the annular cavity is a cooling water channel 11, and the cooling water channel 11 is communicated with the water inlet 91 and the water outlet 103, so that cooling water can flow out of the water outlets 103 after entering from the water inlet 91. The width of the axial step surface v 98 in this embodiment is the same as the width of the axial step surface e108, and in other embodiments, the width of the axial step surface v 98 may be larger than the width of the axial step surface e 108.

The working principle of the hydraulic cylinder cooling structure in the first embodiment of the present application will be explained in detail below.

When the water cooling plate 2 is installed on the hydraulic cylinder, the back surface of the annular main body 102 of the inner sleeve 10 is in contact with the front end cover 7 of the hydraulic cylinder, the step structure of the annular main body 102 is embedded in the middle through hole I92 of the flange 9, and the fixing screw 8 penetrates through the threaded through hole 93 on the flange 9 to be fixedly connected with the front end cover 7. The front end cover 7 is provided with a plurality of threaded blind holes corresponding to the threaded through holes 93. When the hydraulic cylinder works, cooling water is introduced into the water inlet 91 of the water cooling plate 2, then enters the cooling water channel 11 inside the water cooling plate 2, circulates in the cooling water channel 11, and then flows out of the plurality of water outlets 103 communicated with the cooling water channel 11. The cooling water that flows out can spray on piston rod 6, makes piston rod 6 cooling. Meanwhile, because the water cooling plate 2 is in contact with the front end cover 7, the water cooling plate 2 can also absorb the heat of the front end cover 7 to cool the interior of the cylinder body, so that the temperature of hydraulic oil is reduced. By reducing the temperature of the piston rod 6 and the cylinder body, the service life of the hydraulic cylinder seal can be prolonged, and the aim of saving the production cost is fulfilled. In addition, the cooling water is sprayed on the piston rod 6, so that pollutants such as dust can be prevented from being adhered to the piston rod 6, and the sealing of the front end cover of the hydraulic cylinder is damaged. The test result shows that the working temperature of the hydraulic cylinder without the cooling structure can reach 200 ℃, the working temperature of the hydraulic cylinder after the cooling structure is used is reduced to 55 ℃, and the service life of the hydraulic cylinder per se is prolonged from 6 months on average to 12 months on average.

Example two:

The water cooling plate can be designed into other structures, as shown in a side view of the water cooling plate 2 in the second embodiment of fig. 10, the flange 9 includes a stepped hole, a main body and a water inlet 91, the inner sleeve 10 is embedded in the stepped hole of the flange 9 and is fixed between the flange 9 and the front end cover 7 of the hydraulic cylinder by the stepped structure of the flange 9, and as in the first embodiment, the flange 9 is fixed on the front end cover 7 by the fixing screw 8. The inner sleeve 10 comprises an outer circumferential groove 109 and a plurality of water outlets 103, a cooling water channel is formed between the outer circumferential groove 109 and an axial step surface of the flange 9 communicated with the water inlet 91, and the cooling water channel is connected with the water inlet 91 and the water outlets 103.

Example three:

Fig. 11 is a side view of the water-cooling plate 2 in the third embodiment, as in the second embodiment, the flange 9 includes a stepped hole, a main body, and a water inlet 91, the inner sleeve 10 includes a plurality of water outlets 103, and the inner sleeve 10 is embedded in the stepped hole of the flange 9. The flange 9 further comprises an inner circumferential groove 99, a cooling water channel is formed between the inner circumferential groove 99 and the outer circumferential surface of the inner sleeve 10 communicated with the water outlet 103, and the cooling water channel is connected with the water inlet 91 and the water outlet 103.

In addition, the structure of the water cooling plate 2 can also be that an inner circumferential groove is arranged on the flange 9, an outer circumferential groove is arranged on the inner sleeve 10, and the inner circumferential groove and the outer circumferential groove are matched with each other to form a cooling water channel. Or on the basis of the structure of the water cooling plate 2 in the first embodiment, an inner circumferential groove and/or an outer circumferential groove is/are arranged on the flange 9 and/or the inner sleeve 10. In short, the structure of the water-cooling plate 2 can be various types, the cooling water passage can have a plurality of positions or forms, the flange 9 and the inner sleeve 10 can also have a plurality of combinations, the stepped hole on the flange 9 can be a single-stage stepped hole as shown in fig. 10 and 11, or can be a two-stage stepped hole as shown in fig. 7 and a stepped hole with more than two stages, the outer periphery of the inner sleeve 10 is matched with the inner sleeve, and the inner sleeve 10 is matched with the flange 9 in an embedded manner and forms the cooling water passage with the flange as long as the flange 9 can abut the inner sleeve 10 on the front end surface of the hydraulic cylinder. It should be noted that the cooling water channels may be annular structures or divided into multiple sections as in the first, second and third embodiments, and the water inlet 91 may also be disposed on one side of the flange 9 away from the front end cover, as long as each cooling water channel is simultaneously communicated with the water inlet 91 and the water outlet 103, the purpose of the present application may be achieved.

It will be understood that the invention is not limited to the precise arrangements described above and shown in the drawings and that various modifications and changes may be made without departing from the scope thereof. The scope of the present invention is limited only by the appended claims.

Claims (9)

1. A hydraulic cylinder cooling structure is characterized in that: comprises a water-cooling plate and a water-cooling plate,

The water cooling plate comprises a flange and an inner sleeve;

The flange and the inner sleeve are respectively provided with a middle through hole I and a middle through hole II along the thickness direction, and the middle through hole I is a stepped hole and comprises an axial stepped surface and a radial stepped surface;

The inner sleeve is embedded in the middle through hole I and matched with the middle through hole I;

The flange comprises at least one water inlet, the inner sleeve comprises at least one water outlet, and the water outlet is communicated with the middle through hole II;

And a cooling water channel is arranged between the flange and the inner sleeve and is communicated with the water inlet and the water outlet.

2. A hydraulic cylinder cooling structure according to claim 1, wherein: the inner sleeve comprises an outer circumferential groove communicated with the water outlet, and the inner sleeve is matched with the flange to form the cooling water channel.

3. A hydraulic cylinder cooling structure according to claim 1, wherein: the flange includes an inner circumferential groove communicating with the water inlet, which cooperates with the inner sleeve to form the cooling water passage.

4. A hydraulic cylinder cooling structure according to claim 1, wherein: the inner sleeve includes an outer circumferential groove, and the flange includes an inner circumferential groove, the outer circumferential groove and the inner circumferential groove cooperating to form the cooling water passage.

5. The hydraulic cylinder cooling structure according to any one of claims 1 to 4, wherein: the outer peripheral surface of the inner sleeve comprises a step surface, and the step surface of the inner sleeve is matched with the step surface of the flange to form at least part of the cooling water channel.

6. A hydraulic cylinder cooling structure according to claim 1, wherein: and a sealing structure is arranged at the contact position of the inner sleeve and the flange.

7. The hydraulic cylinder cooling structure according to claim 6, wherein: the sealing structure comprises a rubber gasket.

8. The utility model provides a hydraulic cylinder, includes cylinder body subassembly and piston assembly, the cylinder body subassembly includes front end housing, its characterized in that: further comprising a cylinder cooling structure according to any one of claims 1 to 7, wherein the water-cooled plate is fixed to a front end cover of the cylinder.

9. A hydraulic cylinder according to claim 8, wherein: the flange of the water cooling plate is provided with a threaded through hole, the front end cover is provided with a threaded blind hole matched with the threaded through hole, and the water cooling plate is fixed on the front end cover through bolts.

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