A micro-feed control hydraulic cylinder

Abstract

The present invention discloses a micro-feed control hydraulic cylinder, which relates to the technical field of hydraulic cylinders. The present invention includes a cylinder mechanism, a connecting mechanism is provided on the cylinder mechanism, and a sealing mechanism is provided in the connecting mechanism; the cylinder mechanism includes a cylinder barrel, an end cover installed at the end of the cylinder barrel, a guide rod fixedly connected to the end cover, a piston plate slidably connected to the inside of the cylinder barrel, and a piston rod fixedly connected to the piston plate. The present invention can quickly connect or disassemble the external hydraulic oil pipeline with the cylinder barrel through the first connecting head, the second connecting head, the valve core and other structures, which is not only convenient for rapid maintenance of the oil pipeline, but also convenient for simplifying the operation steps and saving installation time. In addition, through the extrusion rod, extrusion block, telescopic rod, second sealing ring and other structures, the sealing performance between the first connecting head and the second connecting head can be enhanced during connection to avoid hydraulic oil leakage and affect the normal extension and retraction of the piston rod.

Description

Technical Field

[0001] The present invention relates to the technical field of hydraulic cylinders, in particular to a micro-feed control hydraulic cylinder. Background Art

[0002] A hydraulic cylinder is a hydraulic actuator that converts hydraulic energy into mechanical energy and performs linear reciprocating motion (or swinging motion). The hydraulic cylinder has a simple structure and reliable operation. When used to achieve reciprocating motion, it can eliminate the need for a reduction gear, and there is no transmission gap, resulting in smooth motion. Therefore, it is widely used in the hydraulic systems of various machines. A hydraulic cylinder basically consists of a cylinder barrel, a cylinder head, a piston, and a piston rod. Currently, hydraulic cylinders mainly rely on sealing the hydraulic oil to lock the hydraulic cylinder. When feeding hydraulic oil, an external oil pipeline is required. The oil pipeline generally uses conventional oil pipe buckles for connection. The installation and removal process is cumbersome, time-consuming, and labor-intensive. To this end, we propose a micro-feed control hydraulic cylinder. Summary of the Invention

[0003] The object of the present invention is to provide a micro-feed control hydraulic cylinder capable of quickly installing or disassembling a hydraulic oil pipeline.

[0004] To achieve the above object, the present invention provides the following technical solution: a micro-feed control hydraulic cylinder, comprising a cylinder mechanism, a connecting mechanism provided on the cylinder mechanism, and a sealing mechanism provided inside the connecting mechanism;

[0005] The cylinder mechanism includes a cylinder, an end cover mounted on the end of the cylinder, a guide rod fixedly connected to the end cover, a piston plate slidably connected to the inside of the cylinder, and a piston rod fixedly connected to the piston plate;

[0006] The connecting mechanism includes a first connector fixedly connected to the side wall of the cylinder, a first guide channel provided in the interior of the first connector, a second connector movably connected to the first connector, a second guide channel provided in the interior of the second connector, a mounting seat mounted in the interior of the second guide channel, a valve core slidably connected to the mounting seat, a first elastic member sleeved on the outer surface of the valve core, a first sealing ring fixedly connected to the side wall of the valve core, a second elastic member sleeved on the outer surface of the second connector, a limit ring sleeved on the outer surface of the second connector, and a steel ball mounted on the side wall of the second connector;

[0007] The sealing mechanism includes an accommodating chamber opened inside the second connector, an extrusion block slidably connected to the inner wall of the accommodating chamber, an extrusion rod slidably connected to the inner wall of the accommodating chamber, a telescopic rod slidably connected to the inner wall of the accommodating chamber, a second sealing ring fixedly connected to one end of the telescopic rod, and a third elastic member sleeved on the telescopic rod.

[0008] Furthermore, there are two end covers, and both end covers are fixedly connected to the cylinder barrel by bolts.

[0009] Furthermore, the piston plate and the cylinder barrel are adapted to each other, and a sealing gasket is provided on the piston plate.

[0010] Furthermore, a guide groove adapted to the guide rod is provided inside the piston rod.

[0011] Furthermore, a guide hole is provided inside the mounting seat.

[0012] Furthermore, a first sealing groove adapted to the first sealing ring is formed on the side wall of the second flow guiding channel.

[0013] Furthermore, a limiting hole adapted to fit the steel ball is provided on the side wall of the first connector.

[0014] Furthermore, a fixing ring is fixedly connected to the inner wall of the limiting ring, and a fixing groove adapted to the fixing ring is opened on the side wall of the first connector.

[0015] Furthermore, the extrusion rod and the telescopic rod are arranged through the accommodating cavity.

[0016] Furthermore, a fourth elastic member is sleeved on the outer surface of the extrusion rod.

[0017] The present invention has at least the following beneficial effects:

[0018] 1. The present invention can quickly connect or disassemble the external hydraulic oil pipeline and the cylinder barrel through the mutual cooperation of the first connector, the second connector, the valve core, the limit ring and other structures, which not only facilitates the rapid maintenance of the oil pipeline, but also simplifies the operation steps and saves installation time.

[0019] 2. The present invention can enhance the sealing performance between the first connector and the second connector during connection through the mutual cooperation of the extrusion rod, extrusion block, telescopic rod, second sealing ring and other structures, thereby avoiding hydraulic oil leakage and affecting the normal extension and retraction of the piston rod.

[0020] 3. The present invention can enhance the connection strength between the first connector and the second connector and improve stability through the mutual cooperation of the fixed ring, fixed groove, steel ball, limiting hole and other structures.

[0021] Of course, any product implementing the present invention does not necessarily need to achieve all of the advantages described above at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a cross-sectional schematic diagram of the overall structure of the present invention;

[0023] Figure 2 is a cross-sectional schematic diagram of the first connector of the present invention in a connected state;

[0024] Figure 3 For the present invention Figure 2 A magnified view of the structure at center A;

[0025] Figure 4 is a cross-sectional schematic diagram of the first connector of the present invention in a separated state;

[0026] Figure 5 It is a three-dimensional schematic diagram of the valve core structure of the present invention.

[0027] Reference numerals:

[0028] 100, cylinder mechanism; 101, cylinder barrel; 102, end cover; 103, guide rod; 104, piston plate; 105, piston rod; 106, guide groove;

[0029] 200, connecting mechanism; 201, first connector; 202, first flow guide channel; 203, second connector; 204, second flow guide channel; 205, mounting seat; 206, valve core; 207, first elastic member; 208, first sealing ring; 209, second elastic member; 210, limiting ring; 211, steel ball; 212, flow guide hole; 213, first sealing groove; 214, limiting hole; 215, fixing ring; 216, fixing groove;

[0030] 300, sealing mechanism; 301, accommodating chamber; 302, extrusion block; 303, extrusion rod; 304, telescopic rod; 305, second sealing ring; 306, third elastic member; 307, fourth elastic member; 308, second sealing groove. DETAILED DESCRIPTION

[0031] The following will be combined with the accompanying drawings in the embodiments of the present disclosure to clearly and completely describe the technical solutions in the embodiments of the present disclosure. Obviously, the embodiments described are only part of the embodiments of the present disclosure, not all of the embodiments. Based on the embodiments of the present disclosure, all other embodiments obtained by ordinary technicians in this field without making any creative efforts are within the scope of protection of the present disclosure.

[0032] See also Figure 1-5The present invention provides a technical solution: a micro-feed control hydraulic cylinder, including a cylinder mechanism 100, a connecting mechanism 200 is provided on the cylinder mechanism 100, and a sealing mechanism 300 is provided in the connecting mechanism 200. The provided cylinder mechanism 100 can be used to drive the piston rod 105 to extend or retract, and the provided connecting mechanism 200 can be used to quickly connect or disassemble the external hydraulic oil pipeline with the cylinder barrel 101, which is not only convenient for rapid maintenance of the oil pipeline, but also convenient for simplifying the operation steps. The provided sealing mechanism 300 can enhance the sealing performance between the first connecting head 201 and the second connecting head 203, thereby preventing hydraulic oil leakage from affecting the normal extension and retraction of the piston rod 105.

[0033] The cylinder mechanism 100 includes a cylinder 101, an end cover 102 installed at the end of the cylinder 101, a guide rod 103 fixedly connected to the end cover 102, a piston plate 104 slidably connected to the inside of the cylinder 101, and a piston rod 105 fixedly connected to the piston plate 104. A guide groove 106 is provided inside the piston rod 105 to match the guide rod 103, so as to facilitate guiding the piston rod 105 when it moves.

[0034] It should be noted that there are two end covers 102 , and both end covers 102 are fixedly connected to the cylinder 101 by bolts, and a through hole adapted to the piston rod 105 is opened in the middle of one of the end covers 102 .

[0035] Furthermore, the piston plate 104 and the cylinder 101 are adapted to each other, and a sealing gasket is provided on the piston plate 104. The provided sealing gasket can enhance the sealing between the piston plate 104 and the cylinder 101, thereby preventing the hydraulic oil from passing through the piston plate 104 and affecting the normal extension and contraction of the piston plate 104 and the piston rod 105.

[0036] In addition, the connecting mechanism 200 is provided in two groups, which are respectively installed at both ends of the cylinder 101 and are mainly used to respectively introduce hydraulic oil into the cylinder 101 to control the extension or contraction of the piston plate 104.

[0037] Specifically, if Figure 1 As shown, by setting up the connecting mechanism 200 and connecting the external hydraulic oil pipeline, hydraulic oil is introduced into the bottom end of the cylinder 101, which can make the piston plate 104 move upward, and the piston rod 105 will extend out of the cylinder 101; when the piston rod 105 is required to retract, hydraulic oil is introduced into the top end of the cylinder 101, and the hydraulic oil above the piston plate 104 will squeeze the piston plate 104, and the hydraulic oil below the piston plate 104 will be discharged, and the piston rod 105 can retract downward.

[0038] The connecting mechanism 200 includes a first connector 201 fixedly connected to the side wall of the cylinder 101, a first guide channel 202 provided inside the first connector 201, a second connector 203 movably connected to the first connector 201, a second guide channel 204 provided inside the second connector 203, a mounting seat 205 mounted inside the second guide channel 204, a valve core 206 slidably connected to the mounting seat 205, and a first elastic member 207 sleeved on the outer surface of the valve core 206, one end of the first elastic member 207 is fixedly connected to the mounting seat 205, and the other end is fixedly connected to the valve core 20 6, it is convenient to drive the valve core 206 to reset, and the first sealing ring 208 is fixedly connected to the side wall of the valve core 206. The side wall of the second guide channel 204 is provided with a first sealing groove 213 adapted to the first sealing ring 208, a second elastic member 209 sleeved on the outer surface of the second connector 203, and a limiting ring 210 sleeved on the outer surface of the second connector 203. One end of the second elastic member 209 is fixedly connected to the limiting ring 210, and the other end is fixedly connected to the second connector 203, which is convenient for driving the limiting ring 210 to reset and the steel ball 211 installed on the side wall of the second connector 203.

[0039] It should be noted that if Figure 2 As shown, the first connector 201 and the second connector 203 are adapted to each other, and a limiting hole 214 adapted to the steel ball 211 is provided on the side wall of the first connector 201. When the steel ball 211 is inserted into the limiting hole 214, the first connector 201 can be limited and fixed.

[0040] Furthermore, a guide hole 212 is provided inside the mounting seat 205 , and the guide hole 212 is used to facilitate the circulation of hydraulic oil.

[0041] On the other hand, a fixing ring 215 is fixedly connected to the inner wall of the limiting ring 210, and a fixing groove 216 adapted to the fixing ring 215 is opened on the side wall of the first connector 201. The setting of the fixing ring 215 and the fixing groove 216 can enhance the fixing effect between the first connector 201 and the second connector 203.

[0042] Specifically, when it is necessary to connect the external hydraulic oil pipeline, first move the limiting ring 210 so that the limiting ring 210 squeezes the second elastic member 209, and then snaps the second connector 203 connected to the external pipeline into the first connector 201, and then loosens the limiting ring 210. Under the action of the second elastic member 209, the limiting ring 210 will be driven to squeeze the steel ball 211, so that the steel ball 211 is snapped into the limiting hole 214, so that the first connector 201 and the second connector 203 are effectively fixed. At the same time, after being snapped in, the top of the first connector 201 will squeeze the valve core 206, so that the valve core 206 squeezes the first elastic member 207 and separates from the second guide channel 204, so that the first guide channel 202 and the second guide channel 204 can be connected, so that the external hydraulic oil pipeline and the cylinder 101 can be quickly connected or disassembled, which not only facilitates the rapid maintenance of the oil pipeline, but also simplifies the operation steps. Figure 4 As shown, when disassembly is required, the limiting ring 210 is pushed again to disengage the steel ball 211 from the limiting hole 214 , thereby disengaging the second connector 203 from the first connector 201 .

[0043] The number of sealing mechanisms 300 is multiple, and the multiple sealing mechanisms 300 are arranged around the second connector 203. The sealing mechanism 300 includes a housing chamber 301 opened inside the second connector 203, an extrusion block 302 slidably connected to the inner wall of the housing chamber 301, and both sides of the extrusion block 302 are provided with inclined surfaces. The side wall of the housing chamber 301 is provided with a guide rail adapted to the extrusion block 302, which is used to guide the moving direction of the extrusion block 302 and the sliding connection on the inner wall of the housing chamber 301. The extrusion rod 303 is provided with a roller at one end of the extrusion rod 303 to reduce the friction between the extrusion rod 303 and the extrusion block 302, a telescopic rod 304 slidably connected to the inner wall of the accommodating chamber 301, a second sealing ring 305 fixedly connected to one end of the telescopic rod 304, a second sealing groove 308 adapted to the second sealing ring 305 is provided on the side wall of the first connector 201, and a third elastic member 306 is sleeved on the telescopic rod 304. The third elastic member 306 is used to facilitate the reset of the telescopic rod 304.

[0044] It should be noted that the extrusion rod 303 and the telescopic rod 304 are arranged through the accommodating cavity 301, and slides are provided on the extrusion rod 303 and the telescopic rod 304, and sliding grooves compatible with the slides are provided on the side walls of the accommodating cavity 301. The sliders and the slides are used to support and guide the extrusion rod 303 and the telescopic rod 304 when they move, thereby enhancing their stability during movement.

[0045] Furthermore, a fourth elastic member 307 is sleeved on the outer surface of the extrusion rod 303, and one end of the fourth elastic member 307 is fixedly connected to the slide, and the other end is fixedly connected to the inner wall of the accommodating cavity 301. The elastic potential energy provided by the fourth elastic member 307 is used to facilitate the reset of the extrusion rod 303.

[0046] Specifically, such as Figure 3 As shown, when the second connector 203 is inserted into the first connector 201, the first connector 201 will push the extrusion rod 303 to move, and then the extrusion rod 303 will squeeze the extrusion block 302 to make it move. When the extrusion block 302 moves, it will squeeze the telescopic rod 304, causing the telescopic rod 304 to extend. When multiple telescopic rods 304 are extended at the same time, the second sealing ring 305 will be driven to extend and be inserted into the second sealing groove 308, so as to enhance the sealing performance between the first connector 201 and the second connector 203, avoid hydraulic oil leakage, and affect the normal extension and retraction of the piston rod 105.

[0047] The principle or process of use of the present invention is as follows: when it is needed, first move the limiting ring 210 so that the limiting ring 210 squeezes the second elastic member 209, and then snaps the second connector 203 connected to the external pipeline into the first connector 201, and then loosens the limiting ring 210. Under the action of the second elastic member 209, the limiting ring 210 will be driven to squeeze the steel ball 211, so that the steel ball 211 is snapped into the limiting hole 214, so that the first connector 201 and the second connector 203 are effectively fixed. At the same time of snapping in, the top of the first connector 201 will also squeeze the valve core 206, so that the valve core 206 squeezes the first elastic member 207 and separates from the second guide channel 204, so that the first guide channel 202 and the second guide channel 204 are connected, and the external hydraulic oil pipeline can be quickly connected to the cylinder 101, and the second connector 203 is snapped into the first connector 2 When the first and second connecting heads 201 and 203 are in the cylinder, the first connecting head 201 pushes the extrusion rod 303 to move, and then the extrusion rod 303 squeezes the extrusion block 302 to make it move. When the extrusion block 302 moves, it squeezes the telescopic rod 304, causing the telescopic rod 304 to extend. When multiple telescopic rods 304 are extended at the same time, the second sealing ring 305 is driven to extend and get stuck in the second sealing groove 308, thereby enhancing the sealing performance between the first connecting head 201 and the second connecting head 203. Then, by introducing hydraulic oil into the bottom end of the cylinder 101, the piston plate 104 can be moved upward, and the piston rod 105 can extend out of the cylinder 101. When the piston rod 105 is retracted when needed, hydraulic oil is introduced into the top end of the cylinder 101. At this time, the hydraulic oil above the piston plate 104 will squeeze the piston plate 104, and the hydraulic oil under the piston plate 104 will be discharged, and the piston rod 105 can be retracted downward.

[0048] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus.

[0049] For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances. When an element is referred to as being "assembled on", "installed on", "fixed on" or "set on" another element, it can be directly on the other element or there can be a central element. When an element is considered to be "connected" to another element, it can be directly connected to the other element or there can be a central element at the same time. The terms "vertical", "horizontal", "up", "down", "left", "right" and similar expressions used herein are for illustrative purposes only and are not intended to be the only embodiment.

[0050] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

[0051] Throughout this specification, references to terms such as "one embodiment," "example," or "specific example" indicate that a specific feature, structure, material, or characteristic described in conjunction with that embodiment or example is included in at least one embodiment or example of the present disclosure. In this specification, schematic representations of these terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

Claims

1. A micro-feed control hydraulic cylinder, comprising a cylinder mechanism (100), characterized in that: A connecting mechanism (200) is provided on the cylinder mechanism (100), and a sealing mechanism (300) is provided inside the connecting mechanism (200); The cylinder mechanism (100) comprises a cylinder (101), an end cover (102) mounted at the end of the cylinder (101), a guide rod (103) fixedly connected to the end cover (102), a piston plate (104) slidably connected to the inside of the cylinder (101), and a piston rod (105) fixedly connected to the piston plate (104); The connecting mechanism (200) comprises a first connecting head (201) fixedly connected to the side wall of the cylinder (101), a first guide channel (202) provided inside the first connecting head (201), a second connecting head (203) movably connected to the first connecting head (201), a second guide channel (204) provided inside the second connecting head (203), a mounting seat (205) mounted inside the second guide channel (204), a valve core (206) slidably connected to the mounting seat (205), a first elastic member (207) sleeved on the outer surface of the valve core (206), a first sealing ring (208) fixedly connected to the side wall of the valve core (206), a second elastic member (209) sleeved on the outer surface of the second connecting head (203), a limiting ring (210) sleeved on the outer surface of the second connecting head (203), and a steel ball (211) mounted on the side wall of the second connecting head (203); The sealing mechanism (300) comprises an accommodating cavity (301) provided inside the second connector (203), an extrusion block (302) slidably connected to the inner wall of the accommodating cavity (301), an extrusion rod (303) slidably connected to the inner wall of the accommodating cavity (301), a telescopic rod (304) slidably connected to the inner wall of the accommodating cavity (301), a second sealing ring (305) fixedly connected to one end of the telescopic rod (304), and a third elastic member (306) sleeved on the telescopic rod (304).

2. A micro-feed control hydraulic cylinder according to claim 1, characterized in that: There are two end covers (102), and both end covers (102) are fixedly connected to the cylinder barrel (101) via bolts.

3. The micro-feed control hydraulic cylinder according to claim 2, characterized in that: The piston plate (104) and the cylinder barrel (101) are adapted to each other, and a sealing gasket is provided on the piston plate (104).

4. The micro-feed control hydraulic cylinder according to claim 2, characterized in that: A guide groove (106) adapted to the guide rod (103) is provided inside the piston rod (105).

5. The micro-feed control hydraulic cylinder according to claim 4, characterized in that: A guide hole (212) is provided inside the mounting seat (205).

6. The micro-feed control hydraulic cylinder according to claim 1, characterized in that: A first sealing groove (213) adapted to the first sealing ring (208) is provided on the side wall of the second flow guiding channel (204).

7. The micro-feed control hydraulic cylinder according to claim 6, characterized in that: A limiting hole (214) adapted to the steel ball (211) is provided on the side wall of the first connector (201).

8. The micro-feed control hydraulic cylinder according to claim 7, characterized in that: A fixing ring (215) is fixedly connected to the inner wall of the limiting ring (210), and a fixing groove (216) adapted to the fixing ring (215) is provided on the side wall of the first connector (201).

9. The micro-feed control hydraulic cylinder according to claim 1, characterized in that: The extrusion rod (303) and the telescopic rod (304) are arranged to pass through the accommodating cavity (301).

10. The micro-feed control hydraulic cylinder according to claim 9, characterized in that: The outer surface of the extrusion rod (303) is sleeved with a fourth elastic member (307).

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