Guide sleeve structure of double-acting hydraulic oil cylinder

Abstract

The utility model belongs to the technical field of hydraulic cylinders, and discloses a double-acting hydraulic oil cylinder guide sleeve structure which comprises a sleeve, a plurality of installation grooves are formed in the side wall of the inner side of the sleeve, a through groove is formed in the portion, between every two adjacent installation grooves, of the wall of the sleeve, and the end portions of the same side ends of the through grooves are communicated. A liquid inlet and a liquid outlet which are communicated with the through groove are formed in the side walls of the outer sides of the two ends of the sleeve; a plurality of guide wheels are arranged in each mounting groove, rotating shafts are fixedly connected to the two sides of each guide wheel, and the rotating shafts penetrate through the groove walls between the mounting grooves and the through grooves and extend into the through grooves. Due to the fact that rolling friction occurs between the guide wheel and the hydraulic rod, friction damage is relatively small relative to sliding friction, meanwhile, due to continuous friction, the temperature of the guide wheel and the hydraulic rod rises, at the moment, cooling liquid is injected into the through groove through the liquid inlet, heat generated by friction is taken away by the flowing cooling liquid through transmission of the guide wheel and the rotating shaft, and the cooling liquid is cooled. And the liquid flows out from the liquid outlet to achieve a cooling effect.

Description

Technical Field

[0001] The utility model belongs to the technical field of hydraulic cylinders, and particularly relates to a guide sleeve structure of a double-acting hydraulic cylinder. Background Technique

[0002] A hydraulic cylinder generally refers to a hydraulic actuator that converts hydraulic energy into mechanical energy and performs linear reciprocating motion (or oscillating motion). It has a simple structure and reliable operation. When used to achieve reciprocating motion, it can eliminate the need for a speed reduction device and has no transmission gap, with smooth motion. Therefore, it is widely used in the hydraulic systems of various machines. To prevent the hydraulic rod on the hydraulic cylinder from shifting during movement, a guide sleeve is often used in cooperation.

[0003] The hydraulic rod undergoes sliding friction with the inner wall of the existing guide sleeve, resulting in a large frictional force and a continuous increase in temperature, which shortens the service life of the guide sleeve. Summary of the Utility Model

[0004] Aiming at the deficiencies of the existing technology, the purpose of the utility model is to provide a guide sleeve structure of a double-acting hydraulic cylinder. Since rolling friction occurs between the guide wheel and the hydraulic rod, compared with sliding friction, the frictional damage is relatively small. At the same time, due to continuous friction, the temperature of the guide wheel and the hydraulic rod increases. At this time, coolant is injected into the through groove through the liquid inlet. The heat generated by friction is carried away by the flowing coolant through the transmission between the guide wheel and the rotating shaft and flows out from the liquid outlet, playing a role in cooling.

[0005] The purpose of the utility model can be realized by the following technical solutions:

[0006] A guide sleeve structure of a double-acting hydraulic cylinder includes:

[0007] A sleeve, on the inner side wall of the sleeve, a plurality of installation grooves are opened along the length direction of the sleeve. Inside the sleeve wall between adjacent two installation grooves, a through groove is opened along the length direction of the sleeve. The ends of the same side of the plurality of through grooves are communicated with each other. On the outer side walls at both ends of the sleeve, a liquid inlet and a liquid outlet communicated with the through groove are opened.

[0008] Guide wheels, a plurality of guide wheels are arranged in each installation groove. Both sides of the guide wheel are fixedly connected with a rotating shaft, and the rotating shaft penetrates through the groove wall between the installation groove and the through groove and extends towards the inside of the through groove.

[0009] The above technical solution, its principle and technical effect:

[0010] The hydraulic rod passes through the sleeve. At this time, the circumferential side of the guide wheel is in close contact with the side wall of the hydraulic rod. The several guide wheels provided play a role in supporting and guiding the reciprocating movement of the hydraulic rod, preventing the hydraulic rod from shifting during movement. Since rolling friction occurs between the guide wheel and the hydraulic rod, as opposed to sliding friction, the frictional damage is relatively small. At the same time, due to continuous friction, the temperature of the guide wheel and the hydraulic rod increases. At this time, coolant is injected into the through groove through the liquid inlet. The heat generated by friction is transferred through the guide wheel and the rotating shaft and carried away by the flowing coolant, flowing out from the liquid outlet, playing a role in cooling.

[0011] In a preferred embodiment of the present utility model, it can be further configured that: annular cavities are provided at both ends of the sleeve, and the annular cavities are all communicated with all the through grooves.

[0012] In a preferred embodiment of the present utility model, it can be further configured that: the liquid inlet and the liquid outlet are communicated with the respective corresponding annular cavities.

[0013] In a preferred embodiment of the present utility model, it can be further configured that: the liquid inlet and the liquid outlet are located on both sides of the sleeve.

[0014] In a preferred embodiment of the present utility model, it can be further configured that: along the length direction of the sleeve, a first through hole equal in number to the installation grooves is provided inside the sleeve wall. The first through hole is close to the installation groove, and a second through hole is communicated between the first through hole and the installation groove. An oil injection port communicated with the first through hole is provided on the side wall outside the sleeve.

[0015] In a preferred embodiment of the present utility model, it can be further configured that: each of the second through holes corresponds to one guide wheel.

[0016] In a preferred embodiment of the present utility model, it can be further configured that: on the other end of the rotating shaft away from the guide wheel, a heat sink is fixedly connected, and the heat sink is located in the through groove.

[0017] In a preferred embodiment of the present utility model, it can be further configured that: an inwardly concave arc-shaped groove is provided along the circumferential direction of the circumferential side of the guide wheel.

[0018] The explanations of the nouns, conjunctions or adjectives involved in the above technical solutions are as follows:

[0019] Fixed connection means that after the parts or components are fixed, there is no relative movement connection. It is divided into two types: detachable connection and non-detachable connection.

[0020] (1) Detachable connection uses screws, splines, wedge pins, etc. to fix the parts together. This connection method can be disassembled during maintenance and will not damage the parts. However, the specifications of the connecting parts used must be correct (such as the length of bolts, keys, wedge pins), and they must be fastened properly.

[0021] (2) Non-detachable connections mainly refer to welding, riveting, and mortise fitting, etc. Since forging, sawing, or oxygen cutting is required for disassembly during maintenance or replacement, the spare parts generally cannot be reused. At the same time, during connection, attention should be paid to process quality, technical inspection, and remedial measures (such as correction, polishing, etc.).

[0022] Threaded connection refers to a detachable connection that connects the connected parts together with threaded parts (or the threaded parts of the connected parts).

[0023] Sliding connection means that two objects are in contact but not fixed, and they can slide relative to each other.

[0024] Rotational connection means that the connection between parts enables the parts to rotate relative to each other.

[0025] Advantages of the present utility model:

[0026] Since rolling friction occurs between the guide wheel and the hydraulic rod, compared with sliding friction, the frictional damage is relatively small. At the same time, due to the continuous occurrence of friction, the temperature of the guide wheel and the hydraulic rod increases. At this time, coolant is injected into the through groove through the liquid inlet, and the heat generated by friction is carried away by the flowing coolant through the transfer between the guide wheel and the rotating shaft and flows out from the liquid outlet, playing a role in cooling. Description of the drawings

[0027] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, for those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0028] Figure 1 It is the first perspective structural schematic diagram of the overall structure of the embodiment of the present utility model;

[0029] Figure 2 It is the second perspective structural schematic diagram of the overall structure of the embodiment of the present utility model;

[0030] Figure 3 It is the first perspective structural schematic diagram of the internal structure of the sleeve of the embodiment of the present utility model;

[0031] Figure 4 It is the second perspective structural schematic diagram of the internal structure of the sleeve of the embodiment of the present utility model;

[0032] Figure 5 It is the sectional view of the sleeve of the embodiment of the present utility model;

[0033] Figure 6 It is the structural schematic diagram of the guide wheel of the embodiment of the present utility model. Detailed implementation mode

[0034] The following will clearly and completely describe the technical solutions in the embodiments of the present utility model with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the protection scope of the present utility model.

[0035] In the description of the present utility model, it should be understood that the terms "opening", "upper", "lower", "thickness", "top", "middle", "length", "inner", "periphery", etc. indicating the orientation or positional relationship are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the components or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present utility model.

[0036] According to the concept of the present application, an embodiment of a double-acting hydraulic cylinder guide sleeve structure is described herein in conjunction with Figures 1 to 6 Specifically, the double-acting hydraulic cylinder guide sleeve structure is configured as a split structure, which has components such as a sleeve 1 and a guide wheel 2. Through the mutual cooperation of the arranged installation grooves 11, through grooves 12, rotating shafts 21, etc., the hydraulic rod passes through the sleeve 1. At this time, the periphery of the guide wheel 2 is in close contact with the side wall of the hydraulic rod. By arranging a plurality of guide wheels 2, it plays a supporting and guiding role for the reciprocating movement of the hydraulic rod, avoiding the deviation of the hydraulic rod during the movement process. Since rolling friction occurs between the guide wheel 2 and the hydraulic rod, as opposed to sliding friction, the frictional damage is relatively small. At the same time, due to continuous friction, the temperature of the guide wheel 2 and the hydraulic rod rises. At this time, coolant is injected into the through groove 12 through the liquid inlet 13. The heat generated by friction is carried away by the flowing coolant through the transfer of the guide wheel 2 and the rotating shaft 21 and flows out from the liquid outlet 14, playing a role in cooling.

[0037] As Figures 1-6 shown, a double-acting hydraulic cylinder guide sleeve structure includes:

[0038] A sleeve 1, on the inner side wall of the sleeve 1, a plurality of installation grooves 11 are opened along the length direction of the sleeve 1. Inside the sleeve wall between two adjacent installation grooves 11, through grooves 12 are opened along the length direction of the sleeve 1. The ends on the same side of a plurality of through grooves 12 are communicated with each other. On the outer side walls at both ends of the sleeve 1, a liquid inlet 13 and a liquid outlet 14 communicated with the through groove 12 are opened;

[0039] A guide wheel 2, a plurality of guide wheels 2 are arranged in each installation groove 11. Both sides of the guide wheel 2 are fixedly connected with a rotating shaft 21. The rotating shaft 21 penetrates the groove wall between the installation groove 11 and the through groove 12 and extends into the through groove 12.

[0040] When in use, the hydraulic rod passes through the sleeve 1. At this time, the circumferential side of the guide wheel 2 is in close contact with the side wall of the hydraulic rod. The several guide wheels 2 provided play a role in supporting and guiding the reciprocating movement of the hydraulic rod, avoiding deviation during the movement of the hydraulic rod. Since rolling friction occurs between the guide wheel 2 and the hydraulic rod, as opposed to sliding friction, the frictional damage is relatively small. At the same time, due to continuous friction, the temperature of the guide wheel 2 and the hydraulic rod increases. At this time, coolant is injected into the through groove 12 through the liquid inlet 13. The heat generated by friction is transferred through the guide wheel 2 and the rotating shaft 21 and carried away by the flowing coolant, flowing out from the liquid outlet 14, playing a role in cooling.

[0041] It should be noted that in this application, the rotating shaft 21 is rotatably connected to the groove walls between the installation groove 11 and the through groove 12, and sealing treatment is performed here to ensure that the coolant cannot penetrate.

[0042] In an embodiment of the present utility model, annular cavities 15 are provided at both ends of the sleeve 1, and the annular cavities 15 communicate with all the through grooves 12. Such a design plays a role in shunting and summarizing. The coolant is shunted when entering and summarized when flowing out.

[0043] In an embodiment of the present utility model, the liquid inlet 13 and the liquid outlet 14 communicate with the corresponding annular cavities 15. The coolant is shunted when entering and summarized when flowing out.

[0044] In an embodiment of the present utility model, the liquid inlet 13 and the liquid outlet 14 are located on both sides of the sleeve 1. Such a design increases the cooling efficiency of the coolant.

[0045] In an embodiment of the present utility model, first through holes 16 equal in number to the installation grooves 11 are provided inside the sleeve 1 wall along the length direction of the sleeve 1. The first through holes 16 are close to the installation grooves 11, and second through holes 17 are provided for communication between the first through holes 16 and the installation grooves 11. An oil injection port 18 communicating with the first through hole 15 is provided on the outer side wall of the sleeve 1. Lubricating oil is regularly injected into the oil injection port 18. The lubricating oil flows into the first through holes 16 and is shunted through the second through holes 17 to contact the guide wheels 2, causing the guide wheels to adhere to the lubricating oil, further playing a lubricating role between the guide wheels 2 and the hydraulic rod.

[0046] In an embodiment of the present utility model, each second through hole 17 corresponds to a guide wheel 2. Such a design ensures that each guide wheel 2 can adhere to the lubricating oil.

[0047] In an embodiment of the present utility model, a heat sink 22 is fixedly connected to the other end of the rotating shaft 21 away from the guide wheel 2, and the heat sink 22 is located in the through groove 12. The setting of the heat sink 22 increases the cooling area and the cooling efficiency.

[0048] In an embodiment of the present utility model, an inwardly concave arc-shaped groove 23 is provided along the circumferential direction of the guide wheel 2 on the circumferential side of the guide wheel 2. Such a design makes the guide wheel 2 fit more closely to the side wall of the hydraulic cylinder, increasing the heat conduction efficiency.

[0049] The following further describes a double-acting hydraulic cylinder guide sleeve structure provided by the present utility model in conjunction with the accompanying drawings and embodiments.

[0050] A double-acting hydraulic cylinder guide sleeve structure includes:

[0051] A sleeve 1, on the inner side wall of the sleeve 1, a plurality of installation grooves 11 are provided along the length direction of the sleeve 1. A through groove 12 is provided inside the wall of the sleeve 1 between two adjacent installation grooves 11 along the length direction of the sleeve 1. The ends on the same side of a plurality of through grooves 12 communicate with each other. Liquid inlets 13 and liquid outlets 14 communicating with the through groove 12 are provided on the outer side walls at both ends of the sleeve 1.

[0052] Guide wheels 2, a plurality of guide wheels 2 are provided in each installation groove 11. Shafts 21 are fixedly connected to both sides of the guide wheels 2, and the shafts 21 extend into the through groove 12 through the groove wall between the installation groove 11 and the through groove 12.

[0053] Annular cavities 15 are provided at both ends of the sleeve 1, and the annular cavities 15 communicate with all the through grooves 12.

[0054] The liquid inlets 13 and the liquid outlets 14 communicate with the corresponding annular cavities 15 respectively.

[0055] The liquid inlets 13 and the liquid outlets 14 are located on both sides of the sleeve 1.

[0056] Inside the wall of the sleeve 1, a plurality of first through holes 16 equal in number to the installation grooves 11 are provided along the length direction of the sleeve 1. The first through holes 16 are close to the installation grooves 11. A second through hole 17 is provided for communicating between the first through hole 16 and the installation groove 11. An oil injection port 18 communicating with the first through hole 15 is provided on the outer side wall of the sleeve 1.

[0057] Each second through hole 17 corresponds to a guide wheel 2.

[0058] On the other end of the shaft 21 far from the guide wheel 2, a heat dissipation fin 22 is fixedly connected, and the heat dissipation fin 22 is located in the through groove 12.

[0059] An inwardly concave arc-shaped groove 23 is provided along the circumferential direction of the guide wheel 2 on the circumferential side of the guide wheel 2.

[0060] In the description of this specification, the descriptions referring to terms such as "one embodiment", "example", "specific example", etc. mean that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present utility model. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0061] The above shows and describes the basic principles, main features and advantages of the present utility model. Those skilled in the art should understand that the present utility model is not limited by the above embodiments. The above embodiments and the descriptions in the specification only illustrate the principles of the present utility model. Without departing from the spirit and scope of the present utility model, the present utility model will have various changes and improvements, and these changes and improvements all fall within the scope of the present utility model claimed.

Claims

1. A double-acting hydraulic cylinder guide sleeve structure, characterized in that: include: A sleeve (1), wherein a plurality of mounting grooves (11) are provided on the inner side wall of the sleeve (1) along the length direction of the sleeve (1), a through groove (12) is provided inside the sleeve (1) wall between two adjacent mounting grooves (11) along the length direction of the sleeve (1), the ends of the plurality of through grooves (12) on the same side are communicated with each other, and a liquid inlet (13) and a liquid outlet (14) communicated with the through groove (12) are provided on the outer side walls at both ends of the sleeve (1); Guide wheels (2), each of the installation grooves (11) is provided with a plurality of guide wheels (2), both sides of the guide wheels (2) are fixedly connected with a rotating shaft (21), and the rotating shaft (21) penetrates the groove wall between the installation groove (11) and the through groove (12) and extends into the through groove (12).

2. A double-acting hydraulic cylinder guide sleeve structure according to claim 1, characterized in that: An annular cavity (15) is provided at both ends of the sleeve (1), and the annular cavity (15) is communicated with all the through grooves (12).

3. A double-acting hydraulic cylinder guide sleeve structure according to claim 2, characterized in that: The liquid inlet (13) and the liquid outlet (14) are in communication with their corresponding annular cavities (15).

4. A double-acting hydraulic cylinder guide sleeve structure according to claim 3, characterized in that: The liquid inlet (13) and the liquid outlet (14) are located on both sides of the sleeve (1).

5. A double-acting hydraulic cylinder guide sleeve structure according to claim 4, characterized in that: The sleeve (1) wall is provided with a number of first through holes (16) equal to the number of the mounting grooves (11) along the length direction of the sleeve (1), the first through holes (16) are close to the mounting grooves (11), a second through hole (17) is connected between the first through hole (16) and the mounting groove (11), and an oil filling port (18) connected to the first through hole (16) is provided on the side wall outside the sleeve (1).

6. A double-acting hydraulic cylinder guide sleeve structure according to claim 5, characterized in that: Each of the second through holes (17) corresponds to a guide wheel (2).

7. A double-acting hydraulic cylinder guide sleeve structure according to claim 1, characterized in that: A heat sink (22) is fixedly connected to the other end of the rotating shaft (21) away from the guide wheel (2), and the heat sink (22) is located in the through groove (12).

8. A double-acting hydraulic cylinder guide sleeve structure according to claim 7, characterized in that: An inwardly concave arc-shaped groove (23) is provided on the circumferential side of the guide wheel (2) along the circumference of the guide wheel (2).

Images