Hydraulic door clamp with protection structure

Abstract

The utility model discloses a hydraulic door clamp with a protection structure, which relates to the technical field of hydraulic door clamps, and comprises a casing, a piston, a cam, a safety valve thimble and a second cavity, a first tail cover is arranged at one end of the casing, a pressure spring is arranged on one side of the first tail cover, and the pressure spring is positioned in the second cavity at one end of the casing. When the door is closed, damping oil flows back through a flowing channel in the piston to form resistance to the door closing, so that the door closing speed is slowed down, the buffering effect is provided, and when the door body is closed, the damping oil flows back through the flowing channel in the piston to form resistance to the door closing. And the steel ball is pushed on the outer side of the oil passage hole to block the oil passage, so that the oil can only flow back through a specific flowing passage, the door closing speed is reduced, and a buffering effect is provided.

Description

Technical Field

[0001] The utility model relates to the technical field of hydraulic door clips, in particular to a hydraulic door clip with a protection structure. Background Technique

[0002] In the prior art, the traditional hinge-type glass door clip needs to be manually closed, and the operation is not convenient enough. Although the spring-type glass door clip has the function of automatic closing, it cannot control the closing speed. The rapid spring force rebound may cause the closing speed to be too fast, increasing the safety hazard of personnel being collided. Moreover, the existing hydraulic door clips cannot stop arbitrarily within the angle range of 120° to 180°, resulting in a large limitation in the opening angle of the hydraulic door clip. To solve these problems, this scheme proposes a hydraulic door clip with a protection structure. Content of the Utility Model

[0003] Aiming at the deficiencies of the prior art, the utility model provides a hydraulic door clip with a protection structure, which solves the problems that the existing hydraulic door clip has limitations in the opening angle and there are safety hazards when the closing speed is too fast mentioned in the background technique.

[0004] To achieve the above purposes, the utility model is realized through the following technical solutions: A hydraulic door clip with a protection structure includes a machine shell, a piston, a cam, a safety valve thimble and a second cavity. One end of the machine shell is provided with a first end cap, and a pressure spring is arranged on one side of the first end cap. The pressure spring is located inside the second cavity at one end of the machine shell. The other end of the pressure spring is provided with a piston, and the piston is in sliding contact with the inner wall of the machine shell. One end of the piston is penetrated by a rotating shaft, and a pulley is sleeved outside the rotating shaft, and a flat pad is arranged at the bottom of the pulley. There is a gap between the side surface of the pulley and the surface of the piston. The pulley is in sliding contact with the surface of the cam. One end of the top of the cam is sleeved with a first bearing, and the first bearing is embedded in the machine shell. The outside of the bottom of the cam is sleeved with a needle bearing, and the needle bearing is embedded in the middle cover. The middle cover is embedded at the bottom of the machine shell, and a second sealing ring is sleeved outside the middle cover. Two oil passage holes are arranged inside the first cavity at the other end of the machine shell and communicated with the second cavity inside the other end of the machine shell, and a steel ball and a safety valve thimble are respectively arranged inside the two oil passage holes.

[0005] Preferably, a safety valve bolt is arranged on one side of the safety valve thimble. A through hole is arranged inside the safety valve bolt and communicated with the inside of the first cavity. The other end of the safety valve thimble is provided with a safety valve spring. When the oil pressure in the cavity exceeds the preset pressure value of the safety valve, the damping oil will push the safety valve thimble to overcome the resistance of the safety valve spring, thereby opening the discharge channel of the safety valve.

[0006] Preferably, the end surface of the safety valve thimble has an arc-shaped structure, and the arc-shaped surface of the safety valve thimble is in close contact with the end of the safety valve bolt. During the pressure relief process, the oil pressure in the first cavity rapidly decreases until it reaches the set value of the closing pressure of the first cavity. At this time, the safety valve thimble returns under the action of the safety valve spring force, and the channel closes again.

[0007] Preferably, a through hole is provided inside the piston, and the inside of the second cavity is connected to the outside of the cam through the through hole inside the piston. When the door is opened, the cam squeezes the elastic sliding component, so that the damping oil in the second cavity flows from one side to the other side through the flow channel inside the piston, reducing the opening resistance of the door. When the door is closed, the damping oil flows back through the flow channel inside the piston, forming a resistance to closing the door, thereby slowing down the closing speed of the door.

[0008] Preferably, a wear-resistant ring and a tail cover seal ring are embedded at one end inside the casing. The tail cover seal ring is sleeved outside the second tail cover, and the second tail cover is threadedly connected to the side surface of the end of the casing.

[0009] Preferably, the outer wall of the cam is divided into four side surfaces. Among them, three adjacent side surfaces are provided with arc-shaped grooves that fit the surface of the pulley, and the other side surface has symmetrically distributed arc-shaped surfaces, and the radian of the arc-shaped surface is gentle. By setting the inner surface of the 120°-180° positioning interval of the outer wall of the cam to a gentle surface, when the cam contacts the pulley, the cam will not rotate with the thrust of the pulley, so that the cam can stop arbitrarily in the 120°-180° positioning interval.

[0010] The utility model provides a hydraulic door clamp with a protection structure, having the following beneficial effects:

[0011] (1). For the hydraulic door clamp with a protection structure, when the door is opened, the cam squeezes the elastic sliding component, so that the damping oil in the second cavity flows from one side to the other side through the flow channel inside the piston, reducing the opening resistance of the door. When the door is closed, the damping oil flows back through the flow channel inside the piston, forming a resistance to closing the door, thereby slowing down the closing speed of the door and providing a buffering effect. When the door body rotates and opens, the cam squeezes the elastic sliding component, so that the damping oil in the oil cavity flows through the flow channel, and the steel ball is pushed inside the oil cavity, thereby controlling the flow direction and flow rate of the oil. When the door body is closed, the steel ball is pushed outside the oil passage hole, blocking the oil passage, so that the oil can only flow back through a specific flow channel, thereby slowing down the closing speed of the door and providing a buffering effect. The steel ball controls the on-off of the oil passage by moving inside the oil passage hole, thereby adjusting the closing speed of the hydraulic door clamp. This design enables the hydraulic door clamp to decelerate smoothly when closing, avoiding impacts or injuries caused by too fast closing speed of the door, and improving the safety and comfort of use.

[0012] (2) In this hydraulic door clamp with a protection structure, in the hydraulic door clamp system, when the glass door is closed with abnormal force, the oil pressure in the first cavity will rise sharply. To address this situation, the system is designed with a safety protection mechanism, namely a safety valve. The core component of the safety valve includes a safety valve thimble, which is supported by a safety valve spring to keep the passage closed under normal conditions. When the oil pressure in the cavity exceeds the preset pressure value of the safety valve, the damping oil will push the safety valve thimble, overcoming the resistance of the safety valve spring, thereby opening the discharge passage of the safety valve. At this time, due to the action of the oil pressure, the damping oil pushes the safety valve thimble through the passage inside the safety valve bolt. The movement of the safety valve thimble will compress the safety valve spring, causing the gap between the original safety valve bolt and the safety valve thimble to open, and the damping oil can flow from the high-pressure area to the low-pressure area to achieve emergency pressure relief. During the pressure relief process, the oil pressure in the first cavity drops rapidly until it reaches the closing pressure setting value of the first cavity. At this time, the safety valve thimble returns to its original position under the action of the safety valve spring force, and the passage closes again to prevent the oil from flowing out continuously, ensuring the safe operation of the hydraulic door clamp system. This design significantly improves the safety of using the door clamp and prevents component damage or safety accidents that may be caused by excessive oil pressure.

[0013] (3) In this hydraulic door clamp with a protection structure, by setting the inner surface of the 120° - 180° positioning interval of the cam outer wall to a smooth surface, when the cam contacts the pulley, the cam will not rotate with the thrust of the pulley, so that the cam can stop arbitrarily within the 120° - 180° positioning interval, thereby reducing the limitation of the opening angle of the glass door.

[0014] Thus, it solves the problems that the existing hydraulic door clamp has limitations in the opening angle and there are safety hazards when the closing speed is too fast. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the overall structure of the present utility model;

[0016] Figure 2 It is a schematic diagram of the structure of the safety valve thimble of the present utility model;

[0017] Figure 3 It is a top view schematic diagram of the cam of the present utility model;

[0018] Figure 4 It is a side view schematic diagram of the cam of the present utility model;

[0019] Figure 5 It is a sectional schematic diagram of the present utility model.

[0020] In the figure, 1 is the casing; 2 is the first end cover; 3 is the pressure spring; 4 is the piston; 5 is the pulley; 6 is the rotating shaft; 7 is the first bearing; 8 is the cam; 9 is the safety valve spring; 10 is the safety valve thimble; 11 is the safety valve bolt; 12 is the second end cover; 13 is the end cover sealing ring; 14 is the wear-resistant ring; 15 is the oil passage hole; 16 is the steel ball; 17 is the needle roller bearing; 18 is the middle cover; 19 is the second sealing ring; 20 is the flat washer; 21 is the first cavity; 22 is the second cavity. Specific embodiments

[0021] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0022] Embodiment 1:

[0023] Please refer to Figures 1-5, an embodiment of the present utility model provides a technical solution: a hydraulic door clip with a protection structure, including a housing 1, a piston 4, a cam 8, a safety valve thimble 10, and a second cavity 22. One end of the housing 1 is provided with a first end cap 2. A pressure spring 3 is provided on one side of the first end cap 2. The pressure spring 3 is located inside the second cavity 22 at one end of the housing 1. The other end of the pressure spring 3 is provided with a piston 4. The piston 4 is in sliding contact with the inner wall of the housing 1. A rotating shaft 6 is inserted through one end of the piston 4. A pulley 5 is sleeved outside the rotating shaft 6. And a flat pad 20 is provided at the bottom of the pulley 5. There is a gap between the side surface of the pulley 5 and the surface of the piston 4. The pulley 5 is in sliding contact with the surface of the cam 8. A first bearing 7 is sleeved outside one end of the top of the cam 8. The first bearing 7 is embedded inside the housing 1. A needle roller bearing 17 is sleeved outside the bottom of the cam 8. The needle roller bearing 17 is embedded inside the middle cover 18. The middle cover 18 is embedded at the bottom of the housing 1. A second sealing ring 19 is sleeved outside the middle cover 18. Two oil passage holes 15 are provided inside the first cavity 21 at the other end of the housing 1 and communicate with the inside of the second cavity 22 at the other end of the housing 1. And steel balls 16 and a safety valve thimble 10 are respectively provided inside the two oil passage holes 15. A safety valve bolt 11 is provided on one side of the safety valve thimble 10. A through hole is provided inside the safety valve bolt 11 and communicates with the inside of the first cavity 21. A safety valve spring 9 is provided at the other end of the safety valve thimble 10. The surface shape of the end of the safety valve thimble 10 is an arc-shaped structure. And the arc-shaped surface of the safety valve thimble 10 is in close fit with the end of the safety valve bolt 11. A through hole is provided inside the piston 4. The inside of the second cavity 22 communicates with the outside cavity of the cam 8 through the through hole inside the piston 4. When the door is opened, the cam 8 presses the elastic sliding assembly, so that the damping oil in the second cavity 22 flows from one side to the other side through the flow channel inside the piston 4, reducing the opening resistance of the door. And when the door is closed, the damping oil flows back through the flow channel inside the piston 4, forming a resistance to closing the door, thereby slowing down the closing speed of the door and providing a buffering effect. When the door body rotates and opens, the cam 8 presses the elastic sliding assembly, so that the damping oil in the oil cavity flows through the flow channel. And the steel ball 16 is pushed inside the oil cavity, thereby controlling the flow direction and flow rate of the oil. When the door body is closed, the steel ball 16 is pushed outside the oil passage hole 15, blocking the oil passage, so that the oil can only flow back through a specific flow channel, thereby slowing down the closing speed of the door and providing a buffering effect. The steel ball 16 controls the on-off of the oil passage by moving inside the oil passage hole 15, and further adjusts the closing speed of the hydraulic door clip. This design enables the hydraulic door clip to decelerate smoothly when closing, avoiding impact or injury caused by too fast closing speed of the door, and improving the safety and comfort of use.

[0024] Embodiment 2:

[0025] One end inside the casing 1 is fitted with a wear-resistant ring 14 and a tail cover sealing ring 13. The tail cover sealing ring 13 is sleeved outside the second tail cover 12. The second tail cover 12 is threadedly connected to the side surface of the end of the casing 1. In the hydraulic door clamp system, when the glass door is closed with abnormal force, the oil pressure in the first cavity 21 will rise sharply. To cope with this situation, the system designs a safety protection mechanism, namely a safety valve. The core component of the safety valve includes a safety valve thimble 10, which is supported by a safety valve spring 9 to keep the channel closed under normal conditions. When the oil pressure in the cavity exceeds the preset pressure value of the safety valve, the damping oil will push the safety valve thimble 10 to overcome the resistance of the safety valve spring 9, thereby opening the discharge channel of the safety valve. At this time, due to the action of the oil pressure, the damping oil pushes the safety valve thimble 10 through the channel inside the safety valve bolt 11. The movement of the safety valve thimble 10 will compress the safety valve spring 9, so that the gap between the original safety valve bolt 11 and the safety valve thimble 10 is opened, and the damping oil can flow from the high-pressure area to the low-pressure area to achieve emergency pressure relief. During the pressure relief process, the oil pressure in the first cavity 21 drops rapidly until it reaches the closing pressure setting value of the first cavity 21. At this time, the safety valve thimble 10 returns to its original position under the action of the force of the safety valve spring 9, and the channel closes again to prevent the oil from flowing out continuously, ensuring the safe operation of the hydraulic door clamp system. This design significantly improves the safety of using the door clamp and prevents component damage or safety accidents that may be caused by excessive oil pressure.

[0026] Embodiment 3:

[0027] The outer wall of the cam 8 is divided into four side surfaces. Among them, three adjacent side surfaces are provided with arc-shaped grooves that fit the surface of the pulley 5, and the other side surface is symmetrically distributed with arc-shaped surfaces, and the arc surface has a gentle curvature. By setting the inner surface of the 120°-180° positioning interval of the outer wall of the cam 8 to a gentle surface, when the cam 8 contacts the pulley 5, the cam 8 will not rotate with the thrust of the pulley 5, so that the cam 8 can stop arbitrarily in the 120°-180° positioning interval, thereby reducing the limitation of the opening angle of the glass door.

[0028] The above shows and describes the basic principles, main features and advantages of the present invention. For those skilled in the art, it is obvious that the present invention is not limited to the details of the above exemplary embodiments, and can be implemented in other specific forms without departing from the spirit or basic features of the present invention. Therefore, in any aspect, the embodiments should be regarded as exemplary and non-limiting. The scope of the present invention is defined by the appended claims rather than the above description. Therefore, it is intended to include all changes within the meaning and scope of the equivalent elements of the claims in the present invention. Any reference signs in the claims should not be regarded as limiting the claims involved.

[0029] In addition, it should be understood that although this specification is described in terms of embodiments, not every embodiment contains only an independent technical solution. This narrative manner of the specification is only for clarity. Those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A hydraulic door clamp with a protective structure, characterized in that: The invention comprises a housing (1), a piston (4), a cam (8), a safety valve ejector pin (10) and a second cavity (22); a first tail cover (2) is arranged at one end of the housing (1); a pressure spring (3) is arranged on one side of the first tail cover (2); the pressure spring (3) is located inside the second cavity (22) at one end of the housing (1); a piston (4) is arranged at the other end of the pressure spring (3); the piston (4) is in sliding contact with the inner wall of the housing (1); a rotating shaft (6) is inserted at one end of the piston (4); a pulley (5) is sleeved on the outside of the rotating shaft (6); a flat washer (20) is arranged at the bottom of the pulley (5); a gap exists between the side of the pulley (5) and the surface of the piston (4); the pulley (5) is provided with a flat washer (20 ... (5) is in sliding contact with the surface of the cam (8); a first bearing (7) is sleeved on the outside of one end of the top of the cam (8); the first bearing (7) is embedded in the inside of the housing (1); a needle bearing (17) is sleeved on the outside of the bottom of the cam (8); the needle bearing (17) is embedded in the inside of a middle cover (18); the middle cover (18) is embedded in the bottom of the housing (1); a second sealing ring (19) is sleeved on the outside of the middle cover (18); two oil passage holes (15) are arranged inside the first cavity (21) at the other end of the housing (1) and are connected to the inside of the second cavity (22) at the other end of the housing (1); and steel balls (16) and safety valve ejector pins (10) are arranged inside the two oil passage holes (15), respectively.

2. The hydraulic door clamp with a protective structure according to claim 1, characterized in that: A safety valve bolt (11) is arranged on one side of the safety valve ejector pin (10); a through hole is arranged inside the safety valve bolt (11) and communicates with the interior of the first cavity (21); and a safety valve spring (9) is arranged at the other end of the safety valve ejector pin (10).

3. The hydraulic door clamp with a protective structure according to claim 1, characterized in that: The surface shape of the end of the safety valve ejector pin (10) is an arc-shaped structure, and the arc-shaped surface of the safety valve ejector pin (10) is tightly fitted with the end of the safety valve bolt (11).

4. The hydraulic door clamp with a protective structure according to claim 1, characterized in that: A through hole is provided inside the piston (4), and the interior of the second cavity (22) is connected to the external cavity of the cam (8) through the internal through hole of the piston (4).

5. The hydraulic door clamp with a protective structure according to claim 1, characterized in that: A wear-resistant ring (14) and a tail cover sealing ring (13) are embedded at one end of the casing (1); the tail cover sealing ring (13) is sleeved on the outside of the second tail cover (12); and the second tail cover (12) is threadedly connected to the side surface of the end of the casing (1).

6. The hydraulic door clamp with a protective structure according to claim 1, characterized in that: The outer wall of the cam (8) is divided into four side surfaces, wherein three adjacent side surfaces are provided with arc-shaped grooves that fit the surface of the pulley (5), and the other side surface is a symmetrically distributed arc-shaped surface with a gentle curvature.

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