Piston connection anti-loosening structure for hydraulic cylinder

Abstract

The utility model discloses a piston connection anti-loose structure for a hydraulic cylinder, which relates to the technical field of hydraulic cylinders, and specifically comprises a limiting structure, a fixing structure and a positioning ring, the limiting structure limits a piston of the hydraulic cylinder, the limiting structure comprises a limiting plate tightly attached to the piston and an inserting rod fixed with the limiting plate, and the fixing structure is arranged on the limiting plate. A piston of the hydraulic cylinder and a piston rod fixed to the piston are both provided with inserting holes matched with the inserting rod, and the outer side of the end, away from the piston, of each inserting hole is provided with a penetrating groove. According to the piston connection anti-loose structure for the hydraulic cylinder, through the arrangement of the limiting structure and the fixing structure, the limiting structure and the fixing structure can be rapidly fixed to or separated from the piston rod, and replacement of a piston of the hydraulic cylinder is facilitated; and the limiting structure and the fixing structure can be mutually limited, so that the structure is prevented from loosening during use, the reliability of the structure for fixing the piston is ensured, and the piston can be prevented from loosening during use.

Description

Technical Field

[0001] The utility model relates to the technical field of hydraulic cylinders, in particular to a piston connection anti-loosening structure for a hydraulic cylinder. Background Art

[0002] The hydraulic cylinder is an actuator in the hydraulic transmission system. It is an energy conversion device that converts hydraulic energy into mechanical energy. The piston hydraulic cylinder is a type of hydraulic cylinder. During the process of oil in and out of the piston hydraulic cylinder, the piston reciprocates in the cylinder body. In traditional technology, the piston and the piston rod are connected by threaded connection. However, due to the friction between the piston and the cylinder wall or the vibration of the hydraulic cylinder, the piston is prone to loosening. To address this problem, some piston connection anti-loosening structures are disclosed in the prior art, such as the authorized patent with application number CN202221255994.8. The invention discloses a piston connection anti-loosening structure for a hydraulic cylinder, which includes a hydraulic cylinder, a piston and a piston rod. The piston is arranged inside the hydraulic cylinder, and the piston rod is arranged on the top of the piston. The surface of the piston rod above the piston is provided with an oil sealing ring and other components.

[0003] When the above scheme is in use, the piston is prevented from loosening by preventing the piston and the piston rod from rotating and preventing the piston rod from separating from the piston. However, when the scheme is in use, the structure for limiting the piston is connected to the piston or the piston rod by screws or screws. Due to vibration and other reasons, the screws and screws may loosen, which will affect the reliability of the above scheme when used. Based on this, the present application proposes a piston connection relaxation structure for a hydraulic cylinder. Utility Model Content

[0004] The utility model provides a piston connection anti-loosening structure for a hydraulic cylinder, which solves the problem that the components of the piston connection anti-loosening structure proposed in the above background technology are connected by screws or screw rods, and the screws and screw rods may loosen due to vibration and other reasons, thereby affecting the reliability of the solution when used.

[0005] The utility model provides the following technical solutions: a piston connection anti-loosening structure for a hydraulic cylinder, comprising a limiting structure, a fixing structure and a positioning ring, wherein the limiting structure limits the piston of the hydraulic cylinder, the limiting structure comprises a limiting plate tightly fitted with the piston and an insert rod fixed to the limiting plate, the piston of the hydraulic cylinder and the piston rod fixed to the piston are both provided with a socket adapted to the insert rod, a through groove is provided on the outer side of the socket away from the end of the piston, a groove is provided on the side of the insert rod close to the through groove, a limiting block is connected to the inner cavity of the groove through a spring 1, and a positioning block is connected to the top or bottom of the inner cavity of the groove through a spring 2; the fixing structure comprises a fixing ring, an inner wall of the fixing ring is provided with a fixing block adapted to both the through groove and the groove, a positioning groove adapted to the positioning block is provided in the middle of the fixing block, the positioning ring is fixedly connected to the piston rod of the hydraulic cylinder, and the positioning ring is located between the piston and the fixing ring.

[0006] Preferably, the piston and the fixing ring are both tightly fitted with the positioning ring, the positioning ring and the limiting plate are magnetically attracted to each other, and the positioning ring and the fixing ring are magnetically attracted to each other.

[0007] Preferably, the inner diameter of the fixing ring is smaller than the outer diameter of the end of the piston rod away from the piston, and the inner diameter of the fixing ring is the same as the outer diameter of the other end of the piston rod.

[0008] Preferably, an electromagnet 1 is provided in the inner cavity of the groove, and an electromagnet 2 adapted to the electromagnet 1 is fixed on the positioning block.

[0009] Preferably, the top of the limiting block and the top of the inner cavity of the groove are at the same height, and the height value of the limiting block is the same as the height value of the fixing block.

[0010] Preferably, the number of the inserting rods is the same as the number of the fixing rings, there are at least two inserting rods, and the positions of the springs 2 in two adjacent inserting rods are different.

[0011] Compared with the prior art, the utility model has the following beneficial effects:

[0012] 1. The piston connection anti-loosening structure for the hydraulic cylinder can realize rapid fixation or separation with the piston rod through the setting of the limiting structure and the fixing structure, so as to facilitate the replacement of the hydraulic cylinder piston; and the limiting structure and the fixing structure can limit each other to avoid the loosening of the structure when in use, thereby ensuring the reliability of the structure in fixing the piston, thereby avoiding the loosening of the piston when in use.

[0013] 2. The piston connection anti-loosening structure for the hydraulic cylinder can limit the piston through the setting of the plug rod, thereby avoiding the possibility of rotation of the piston and improving the reliability of the connection between the piston and the piston rod; through the setting of the positioning ring, the positioning ring can limit the fixing ring to avoid loosening of the fixing ring, thereby further avoiding loosening of the structure when in use. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the structure and use of the utility model;

[0015] Figure 2 The utility model structure Figure 1 Back diagram;

[0016] Figure 3 The utility model structure Figure 1 Schematic cross-section;

[0017] Figure 4 The utility model structure Figure 1 Explosion diagram;

[0018] Figure 5 This is a schematic diagram of the structural limit structure of the utility model;

[0019] Figure 6 This is a cross-sectional schematic diagram of the structure of the utility model;

[0020] Figure 7 It is a schematic diagram of the structural fixing ring of the utility model.

[0021] In the figure: 1. limit plate; 2. plug rod; 3. groove; 4. fixing ring; 5. fixing block; 6. limit block; 7. spring 1; 8. positioning block; 9. electromagnet 2; 10. electromagnet 1; 11. spring 2; 12. positioning ring; 13. through groove; 14. socket; 15. piston rod; 16. piston. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0023] The utility model provides a piston connection anti-loosening structure for a hydraulic cylinder, comprising a limiting structure, a fixing structure and a positioning ring 12, the limiting structure comprising a limiting plate 1 and an insert rod 2 fixed to the limiting plate 1, a groove 3 is provided on one side of the other end of the insert rod 2, a limiting block 6 is connected to the inner cavity of the groove 3 through a spring 7, the top of the limiting block 6 is at the same height as the top of the inner cavity of the groove 3, the bottom of the limiting block 6 is in contact with the bottom of the inner cavity of the groove 3, through the setting of the spring 7, under the action of external force, the limiting block 6 can move in the inner cavity of the groove 3, and the restriction on the limiting block 6 is released, and under the action of the rebound force of the spring 7, the limiting block 6 can be reset.

[0024] A cavity is provided at the top and the bottom of the inner cavity of the groove 3, and a positioning block 8 is connected to the inner cavity of the cavity through a spring 11. The limit block 6 can limit the positioning block 8. When the limit block 6 is separated from the positioning block 8, the positioning block 8 can move into the inner cavity of the groove 3 under the action of the rebound force of the spring 11.

[0025] An electromagnet 10 is provided in the inner cavity of the groove 3, and an electromagnet 2 9 adapted to the electromagnet 10 is fixed on the positioning block 8. In some embodiments of the present application, the models of the electromagnet 10 and the electromagnet 2 9 can both be LS-P20 / 23S. When the same current is passed through the electromagnet 10 and the electromagnet 2 9, the electromagnet 10 and the electromagnet 2 9 are in a state of magnetic repulsion. Under the action of the repulsive force, the positioning block 8 can be away from the electromagnet 10, so that the positioning block 8 can be away from the groove 3.

[0026] The fixing structure includes a fixing ring 4, the inner wall of which is fixed with a fixing block 5 adapted to the groove 3, and the middle of the top and the middle of the bottom of the fixing block 5 are provided with positioning grooves adapted to the positioning block 8. When the fixing block 5 is inserted into the groove 3, the fixing block 5 can squeeze the limiting block 6. When the limiting block 6 is separated from the positioning block 8, the positioning block 8 can be inserted into the positioning groove under the action of the rebound force of the spring 11, so that the fixing ring 4 is fixed together with the insertion rod 2. The height value of the limiting block 6 is the same as that of the fixing block 5. When the fixing block 5 is inserted into the groove 3, the fixing block 5 can fit with the inner wall of the groove 3 to prevent the fixing ring 4 from moving.

[0027] The number of the fixing rings 4 is the same as the number of the inserting rods 2. There are at least two inserting rods 2, and the positions of the springs 11 in two adjacent inserting rods 2 are different. This arrangement can prevent the positioning block 8 from being separated from the positioning groove.

[0028] When the piston connection anti-loosening structure is in use, the positioning ring 12 is fixedly connected to the outer surface of the piston rod 15, the positioning ring 12 is located between the limit plate 1 and the fixing ring 4, the piston 16 is fixedly connected to one end of the piston rod 15, and the piston 16 is located between the limit plate 1 and the positioning ring 12, the limit plate 1 and the positioning ring 12 are tightly fitted with the piston 16, the piston 16 is provided with a hole adapted to the insertion rod 2, the insertion rod 2 is inserted into the insertion hole through the hole, the insertion rod 2 can limit the piston 16 to avoid the possibility of rotation of the piston 16, and improve the reliability of the connection between the piston 16 and the piston rod 15, the limiting plate 1 and the positioning ring 12 can limit the piston 16, the fixing ring 4 is tightly fitted with the positioning ring 12 and the piston rod 15, and the annular groove formed by the positioning ring 12 and the piston rod 15 can limit the fixing ring 4 to avoid movement of the fixing ring 4.

[0029] One end of the piston rod 15 is provided with a socket 14 adapted to the insertion rod 2, and the insertion rod 2 can be inserted into the socket 14. The outer side of the socket 14 away from the piston 16 is provided with a through groove 13. When the insertion rod 2 is fully inserted into the socket 14, the groove 3 overlaps with the through groove 13, and the fixing block 5 is adapted to the through groove 13. The fixing block 5 can be inserted into the groove 3 through the through groove 13.

[0030] The positioning ring 12 and the limit plate 1 are magnetically attracted to each other, and the positioning ring 12 and the fixing ring 4 are magnetically attracted to each other, which improves the reliability of the structure when in use. The inner diameter of the fixing ring 4 is smaller than the outer diameter of the end of the piston rod 15 away from the piston 16, and the inner diameter of the fixing ring 4 is the same as the outer diameter of the other end of the piston rod 15. In some embodiments of the present application, the outer surfaces of the positioning ring 12, the limit plate 1 and the fixing ring 4 are all fixed with permanent magnets.

[0031] To sum up: when the piston connection anti-loosening structure for the hydraulic cylinder is used, the piston 16 is sleeved on the piston rod 15 until the piston 16 is tightly fitted with the positioning ring 12, the insertion rod 2 is inserted into the insertion hole 14, until the limit plate 1 is tightly fitted with the piston 16, and the fixing block 5 is inserted into the groove 3 through the through groove 13. During the insertion process of the fixing block 5, the fixing block 5 squeezes the limit block 6. When the limit block 6 is separated from the positioning block 8, the positioning groove and the positioning block 8 overlap, and the rebound force of the spring 11 can push the positioning block 8 to move. Under the action of the rebound force of the spring 11, the positioning block 8 can move into the positioning groove, and the positioning block 8 is used to fix the fixing block 5. At this time, the limiting structure and the fixing structure are fixed together with the piston rod 15, and the limiting structure and the fixing structure cannot move. The piston 16 is clamped and fixed by the limiting plate 1 and the positioning ring 12, which can prevent the piston 16 from loosening during operation. When the piston 16 needs to be removed, current with the same direction is passed through the electromagnet 10 and the electromagnet 2 9. The electromagnet 10 and the electromagnet 2 9 magnetically repel each other. Under the action of the repulsive force, the positioning block 8 and the fixing block 5 can be separated. After removing the fixing ring 4, the limiting structure can be removed, which is convenient for replacing the piston 16 of the hydraulic cylinder.

[0032] The standard parts used in the utility model can be purchased from the market, and the special-shaped parts can be customized according to the description in the specification and the drawings. The specific connection methods of each part adopt the conventional means such as mature bolts, rivets, welding, etc. in the prior art. The machinery, parts and equipment all adopt the conventional models in the prior art and will not be described in detail here. The contents not described in detail in this specification belong to the prior art known to professional and technical personnel in this field. Although the embodiments of the utility model have been shown and described, it can be understood by ordinary technicians in this field that various changes, modifications, substitutions and modifications can be made to these embodiments without departing from the principle and spirit of the utility model. The scope of the utility model is defined by the attached claims and their equivalents.

Claims

1. A piston connection anti-loosening structure for a hydraulic cylinder, comprising a limiting structure, a fixing structure and a positioning ring (12), characterized in that: The limiting structure limits the position of the piston of the hydraulic cylinder. The limiting structure comprises a limiting plate (1) tightly fitted with the piston and an insertion rod (2) fixed to the limiting plate (1). The piston of the hydraulic cylinder and the piston rod fixed to the piston are both provided with a plug hole (14) adapted to the insertion rod (2). A through groove (13) is provided on the outer side of the plug hole (14) away from the piston. A groove (3) is provided on the side of the insertion rod (2) close to the through groove (13). The inner cavity of the groove (3) is connected to the through groove (13) by a spring (7). A limit block (6) is connected, and the top or bottom of the inner cavity of the groove (3) is connected to a positioning block (8) via a second spring (11); the fixing structure comprises a fixing ring (4), the inner wall of the fixing ring (4) is provided with a fixing block (5) adapted to both the through groove (13) and the groove (3), the middle of the fixing block (5) is provided with a positioning groove adapted to the positioning block (8), the positioning ring (12) is fixedly connected to the piston rod of the hydraulic cylinder, and the positioning ring (12) is located between the piston and the fixing ring (4).

2. The piston connection anti-loosening structure for a hydraulic cylinder according to claim 1, characterized in that: The piston (16) and the fixing ring (4) are both tightly fitted with the positioning ring (12); the positioning ring (12) and the limit plate (1) are magnetically attracted to each other; and the positioning ring (12) and the fixing ring (4) are magnetically attracted to each other.

3. The piston connection anti-loosening structure for a hydraulic cylinder according to claim 1, characterized in that: The inner diameter of the fixing ring (4) is smaller than the outer diameter of one end of the piston rod (15) away from the piston (16), and the inner diameter of the fixing ring (4) is the same as the outer diameter of the other end of the piston rod (15).

4. The piston connection anti-loosening structure for a hydraulic cylinder according to claim 1, characterized in that: An electromagnet 1 (10) is provided in the inner cavity of the groove (3), and an electromagnet 2 (9) adapted to the electromagnet 1 (10) is fixed on the positioning block (8).

5. The piston connection anti-loosening structure for a hydraulic cylinder according to claim 1, characterized in that: The top of the limiting block (6) is at the same height as the top of the inner cavity of the groove (3), and the height value of the limiting block (6) is the same as the height value of the fixing block (5).

6. The piston connection anti-loosening structure for a hydraulic cylinder according to claim 1, characterized in that: The number of the insertion rods (2) is the same as the number of the fixing rings (4), there are at least two insertion rods (2), and the positions of the second springs (11) in two adjacent insertion rods (2) are different.

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