Damping structure for preventing machine cover from rapidly rotating and falling

Abstract

The utility model discloses a damping structure for preventing a machine cover from quickly rotating and falling, which comprises a rotating shaft, a shell sleeved on the rotating shaft, viscous fluid sealed in the shell and a baffle piece, the inner wall of the shell is in a hollow cylinder shape, and two convex ribs are oppositely arranged on the inner wall of the shell in a convex manner; the inner cavity of the shell is divided into a first closed chamber and a second closed chamber by the convex rib and the rotating shaft; two straight grooves are oppositely formed in the outer wall of the rotating shaft, and a plurality of through holes used for containing the elastic elements are formed in the straight grooves in the radial direction in a penetrating mode. The two groups of blocking pieces can rotate in the first cavity and the second cavity respectively, each blocking piece comprises a straight surface and an arc surface, and the straight surfaces can be movably inserted into the straight grooves and are connected with the elastic elements; the end face of the arc face is tightly attached to the inner wall of the shell under the action of the elastic element, and a plurality of flow limiting holes are formed in the arc face. According to the utility model, through the damping structure, the positive and negative rotation damping magnitude can be greatly different, and a clearance basically does not exist in the positive and negative rotation switching process.

Description

Technical Field

[0001] The utility model relates to the technical field of dampers, in particular to a damping structure for preventing a machine cover from rotating rapidly and falling. Background Art

[0002] There are great differences in the requirements for forward and reverse damping in many application scenarios in life, such as electric doors and lifting platforms. By adjusting the forward and reverse damping, the user experience can be improved. When opening the door, smaller damping may be required to facilitate the user to push, while when closing the door, larger damping may be required to ensure that the door can close smoothly. Utility Model Content

[0003] The utility model provides a damping structure for preventing the cover from rotating rapidly and falling, which can realize a large difference in the damping size between forward and reverse rotation, and there is basically no empty position in the process of forward and reverse switching. The specific scheme is as follows:

[0004] A damping structure for preventing a cover from rotating rapidly and falling comprises a rotating shaft, a housing sleeved on the rotating shaft, a viscous fluid sealed in the housing, and a baffle arranged on a side wall of the rotating shaft.

[0005] The inner wall of the shell is a hollow cylinder with one end open, and two convex ribs are relatively protruding from the inner wall, and the convex ribs and the rotating shaft together divide the inner cavity of the shell into two closed first chambers and a second chamber;

[0006] The rotating shaft comprises a first shaft section located inside the housing and a second shaft section located outside the housing, a plurality of through holes are formed through the outer wall of the first shaft section in the axial direction, and the through holes are used to accommodate the elastic element;

[0007] The baffle is provided with two groups, which are elastically connected to the two sides of the elastic element respectively, and can rotate in the first chamber and the second chamber respectively, and include an arc surface, the end surface of the arc surface abuts against the inner wall of the shell under the action of the elastic element, and a plurality of flow limiting holes are opened on the arc surface, so that the viscous fluid in the first chamber and the second chamber can flow through the flow limiting holes.

[0008] Furthermore, the barrier member further includes a straight surface, a straight groove is provided at a corresponding position of the outer wall of the first shaft segment, and the straight surface can be movably inserted into the straight groove and elastically connected to the elastic element.

[0009] Furthermore, a plurality of connection blocks are arranged at intervals on the bottom of the straight surface, and the connection blocks are arranged corresponding to the through holes for fixedly connecting the elastic element.

[0010] Furthermore, two sliding pieces are vertically arranged at both ends of the straight surface, a connecting piece is formed between the sliding piece and the arc surface, and the end face of the connecting piece is rotary cut with the inner wall of the shell; two guiding pieces are vertically arranged at both ends of the straight groove, and sliding grooves are recessed on the opposite sides of the guide piece, and the sliding grooves are matched with the sliding piece so that the barrier piece can slide along the direction of the sliding groove.

[0011] Furthermore, the opening of the shell is sealed by a sealing cover.

[0012] Furthermore, the first shaft section is cylindrical, and its outer wall and the end surface of the convex rib are rotary cut, including a first end and a second end, the first end abuts against the bottom wall of the shell, and the second end abuts against the sealing cover.

[0013] Furthermore, a circular ring is protruded from the second end of the first shaft segment along the circumferential direction, and the outer diameter of the circular ring is equal to the inner diameter of the shell, so that the rotating shaft can be inserted into and covered at the opening of the shell.

[0014] Furthermore, a gasket is provided between the sealing cover and the circular ring.

[0015] Furthermore, a boss is axially protruded at the first end of the rotating shaft, and a groove is axially recessed on the inner bottom wall of the shell. The groove is matched with the boss so that the rotating shaft can rotate relative to the shell.

[0016] Furthermore, a fixing block is protruded along the axial direction on the outer bottom wall of the shell to fix the shell.

[0017] The beneficial effects of the utility model are as follows: the structural design of the damping structure of the utility model is reasonable, the performance is more stable, and a large difference in the damping size between forward and reverse rotation can be achieved, and there is basically no virtual position in the process of forward and reverse switching. Through the arrangement of the straight groove, the through hole and the elastic element, the baffle can be elastically arranged on both sides of the first shaft section; through the arrangement of the arc surface, the baffle generates pressure components in different directions on the elastic element during forward and reverse rotation, thereby driving the baffle to separate from or press the inner wall of the shell. When the baffle separates from the inner wall of the shell, the viscous fluid can not only flow through the flow-limiting hole, but also flow through the gap between the baffle and the shell, at which time the damping force is small; when the baffle presses the inner wall of the shell, the viscous fluid can only flow through the flow-limiting hole, at which time the damping force is large, so as to achieve a large difference in the damping size between the forward and reverse rotation of the damping structure. In addition, the damping force of the damping structure of the utility model can be adjusted by changing the viscosity of the viscous fluid, the stiffness and preload value of the elastic element, the size, number, distribution of the flow-limiting holes, and the shape of the baffle. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1This is a schematic structural diagram of a damping structure for preventing a machine cover from rotating rapidly and falling according to the utility model;

[0019] Figure 2 This is an exploded view of a damping structure for preventing a machine cover from rotating and falling rapidly according to the utility model;

[0020] Figure 3 This is a schematic structural diagram of a rotating shaft of a damping structure for preventing a cover from rotating and falling rapidly according to the utility model;

[0021] Figure 4 This is a cross-sectional view of a damping structure for preventing a machine cover from rotating rapidly and falling according to the utility model;

[0022] Numbers in the figure: 1, rotating shaft; 11, first shaft section; 12, second shaft section; 111, through hole; 112, straight groove; 113, guide member; 1131, slide groove; 114, first end; 1141, boss; 115, second end; 1151, ring; 2, shell; 21, convex rib; 22, first chamber; 23, second chamber; 24, fixed block; 3, barrier member; 31, straight surface; 32, arc surface; 321, flow limiting hole; 33, connecting block; 34, slide member; 35, connecting member; 4, sealing cover; 5, elastic element; 6, gasket. DETAILED DESCRIPTION

[0023] It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0024] In order to enable those skilled in the art to better understand the solution of the utility model, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is only a part of the embodiment of the utility model, not all of the embodiments. Based on the embodiment of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the utility model.

[0025] Figure 1-3 schematically shows a schematic diagram of the structure of a damping structure for preventing a cover from rotating rapidly and falling according to the utility model, comprising a rotating shaft 1, a shell 2 sleeved on the rotating shaft 1, a viscous fluid sealed in the shell 2, and a baffle 3 elastically arranged on the side wall of the rotating shaft 1. The inner wall of the shell 2 is a hollow cylinder with an opening at one end. A sealing cover 4 for sealing the viscous fluid is arranged at the opening, and two convex ribs 21 are relatively convexly arranged on the inner wall. The convex ribs 21 and the rotating shaft 1 together divide the inner cavity of the shell 2 into two sealed first chambers 22 and second chambers 23; the rotating shaft 1 includes a first chamber 22 and a second chamber 23 located at the inner wall of the shell 2. The first shaft section 11 in the housing 2 and the second shaft section 12 outside the housing 2, the outer wall of the first shaft section 11 is provided with two straight grooves 112, and a plurality of through holes 111 are provided along the straight grooves 112, and the through holes 111 are used to accommodate the elastic element 5; the barrier 3 is provided with two groups, which can rotate in the first chamber 22 and the second chamber 23 respectively, including a straight surface 31 and an arc surface 32, the straight surface 31 is provided in conjunction with the straight groove 112, can be movably inserted in the straight groove 112, and connected with the elastic element 5, and the end surface of the arc surface 32 is tightly attached to the inner wall of the housing 2 under the action of the elastic element 5. In this embodiment, two groups of through holes 111 are provided, which are respectively located at the two ends of the straight groove 112, and the inner diameter thereof is slightly larger than the outer diameter of the elastic element 5, so that the elastic element 5 can be telescopically arranged in the through holes 111.

[0026] It should be noted that the damping structure of the present application has a reasonable structural design and more stable performance, and can achieve a large difference in the damping size between forward and reverse rotation, and there is basically no virtual position in the process of forward and reverse switching. Through the arrangement of the straight groove 112, the through hole 111 and the elastic element 5, the baffle 3 can be elastically arranged on both sides of the first shaft section 11; through the arrangement of the arc surface 32, the baffle 3 generates pressure components in different directions on the elastic element 5 when rotating clockwise or counterclockwise, thereby driving the baffle 3 to separate from the shell 2 or press the inner wall of the shell 2. When the baffle 3 separates from the inner wall of the shell 2, the viscous fluid can not only flow through the flow-limiting hole 321, but also flow through the gap between the baffle 3 and the shell 2, and the damping force is relatively small at this time; when the baffle 3 presses the inner wall of the shell 2, the viscous fluid can only flow through the flow-limiting hole 321, and the damping force is relatively large at this time. Here, the bending of the arc surface 32 in the counterclockwise direction is taken as an example for explanation. When the rotating shaft 1 rotates counterclockwise, the viscous fluid generates a pressure on the arc surface 32 of the baffle 3 that is perpendicular to the inner surface of the arc surface 32, and a component of the force is perpendicular to the inner wall of the shell 2 and outward, pressing the baffle 3 against the inner wall of the shell 2. At this time, the viscous fluid can only flow through the flow limiting hole 321, and the damping force is relatively large; when the rotating shaft 1 rotates clockwise, the viscous fluid in the shell 2 generates a pressure on the arc surface 32 of the baffle 3 that is perpendicular to the outer surface of the arc surface 32, and a component of the force is perpendicular to the inner wall of the shell 2 and inward, and is greater than the pre-compression value of the elastic element 5, so that the baffle 3 is separated from the inner wall of the shell 2. At this time, the viscous fluid can not only flow along the flow limiting hole 321 on the baffle 3, but also flow along the gap between the baffle 3 and the shell 2, and the damping force is relatively small. Therefore, the present embodiment can achieve a large difference in forward and reverse damping by setting the arc surface 32. When the arc surface 32 is bent in the counterclockwise direction, the damping force of the rotating shaft 1 when rotating clockwise is much smaller than that when rotating counterclockwise; when the arc surface 32 is bent in the clockwise direction, the damping force of the rotating shaft 1 when rotating clockwise is much larger than that when rotating counterclockwise. And the damping force of the damping structure of the utility model can be adjusted by changing the viscosity of the viscous fluid, the stiffness and preload value of the elastic element 5, the size, number, and distribution of the flow limiting holes, and the shape of the baffle 3.

[0027] Preferably, please refer to Figure 4 The first shaft section 11 is cylindrical, and its outer wall and the end surface of the convex rib 21 are rotary cut, including a first end 114 and a second end 115. The first end 114 abuts against the bottom wall of the shell 2, and the second end 115 abuts against the sealing cover 4, thereby achieving the purpose of dividing the shell 2 into two closed first chambers 22 and second chambers 23 through the first shaft section 11 and the convex rib 21.

[0028] Furthermore, in order to make the connection between the barrier 3 and the elastic element 5 more stable, a plurality of connection blocks 33 are arranged at intervals at the bottom of the straight surface 31. The connection blocks 33 are arranged corresponding to the through holes 111 and are used to fix and connect the elastic element 5. In this embodiment, the connection blocks 33 are cylindrical, and their outer diameter is slightly smaller than the inner diameter of the through hole 111, so that the connection blocks 33 can reciprocate in the through hole 111.

[0029] Furthermore, two sliding members 34 are vertically arranged at both ends of the straight surface 31, and a connecting member 35 is formed between the sliding member 34 and the curved surface 32, and the end surface of the connecting member 35 is rotary cut with the inner wall of the shell 2; two guiding members 113 are vertically arranged at both ends of the straight groove 112, and sliding grooves 1131 are recessed on the opposite sides of the guide member 113, and the sliding grooves 1131 are matched with the sliding member 34, so that the barrier member 3 can slide along the direction of the sliding grooves 1131.

[0030] Furthermore, in order to improve the sealing effect of the shell 2, a circular ring 1151 is protruded along the circumferential direction on the second end 115 of the first shaft segment 11, and the outer diameter of the circular ring 1151 is equal to the inner diameter of the shell 2, so that the rotating shaft 1 can be inserted and covered at the opening of the shell 2, and the sealing cover 4 is covered on the circular ring 1151, and a gasket 6 is provided between the sealing cover 4 and the circular ring 1151.

[0031] Furthermore, in order to facilitate the installation of the rotating shaft 1, the second shaft segment 12 is set to be cylindrical, and its outer diameter is larger than the outer diameter of the first shaft segment 11, and the end of the second shaft segment 12 is milled into a flat position, so that the rotating shaft 1 can be fixedly installed through the flat position.

[0032] Furthermore, in order to improve the sealing effect of the first chamber 22 and the second chamber 23 and ensure that the rotating shaft 1 rotates around the central axis of the shell 2, a boss 1141 is axially protruded at the first end 114 of the rotating shaft 1, and a groove is axially recessed on the inner bottom wall of the shell 2. The groove is matched with the boss 1141 so that the rotating shaft 1 can rotate relative to the shell 2.

[0033] Furthermore, in order to facilitate the fixed installation of the shell, a fixing block 24 is axially protruded from the outer bottom wall of the shell 2. The fixing block 24 is cylindrical, and its outer diameter is smaller than the outer diameter of the shell 2, and is milled into a flat position so that the shell 2 can be fixed and installed through the flat position.

[0034] During assembly, first assemble the baffle 3 to both sides of the rotating shaft 1, then insert and cover the rotating shaft 1 assembled with the baffle 3 into the opening of the shell 2, and the baffle 3 is pressed against the inner wall of the shell 2 under the action of the elastic element 5, and finally the opening of the shell 2 is sealed by the sealing cover 4.

[0035] The above are only some embodiments of the present invention. For those skilled in the art, several modifications and improvements can be made without departing from the inventive concept of the present invention, which all belong to the protection scope of the present invention.

Claims

1. A damping structure for preventing a cover from rotating rapidly and falling, characterized in that: The invention comprises a rotating shaft (1), a housing (2) sleeved on the rotating shaft (1), a viscous fluid sealed in the housing (2), and a baffle (3) arranged on the side wall of the rotating shaft (1). The inner wall of the shell (2) is in the shape of a hollow cylinder with one end open, and two convex ribs (21) are provided on the inner wall thereof, and the convex ribs (21) and the rotating shaft (1) together divide the inner cavity of the shell (2) into two sealed first chambers (22) and second chambers (23); The rotating shaft (1) comprises a first shaft section (11) located inside the housing (2) and a second shaft section (12) located outside the housing (2); a plurality of through holes (111) are formed through the outer wall of the first shaft section (11) in the axial direction, and the through holes (111) are used to accommodate the elastic element (5); The baffle (3) is provided with two groups, which are elastically connected to the two sides of the elastic element (5) respectively, and can rotate in the first chamber (22) and the second chamber (23) respectively, and include an arc surface (32). The end surface of the arc surface (32) abuts against the inner wall of the shell (2) under the action of the elastic element (5), and a plurality of flow-limiting holes (321) are opened on the arc surface (32), so that the viscous fluid in the first chamber (22) and the second chamber (23) can flow through the flow-limiting holes (321).

2. The damping structure according to claim 1, characterized in that: The barrier member (3) further comprises a straight surface (31), a straight groove (112) is provided at a corresponding position of the outer wall of the first shaft section (11), and the straight surface (31) can be movably inserted into the straight groove (112) and elastically connected to the elastic element (5).

3. The damping structure according to claim 2, characterized in that: A plurality of connection blocks (33) are arranged at intervals at the bottom of the straight surface (31); the connection blocks (33) are arranged corresponding to the through holes (111) and are used for fixedly connecting the elastic element (5).

4. The damping structure according to claim 2, characterized in that: Two sliding members (34) are vertically arranged at both ends of the straight surface (31), and a connecting member (35) is formed between the sliding member (34) and the curved surface (32), and the end surface of the connecting member (35) is rotary cut with the inner wall of the shell (2); two guiding members (113) are vertically arranged at both ends of the straight groove (112), and two opposite surfaces of the guiding member (113) are concavely provided with sliding grooves (1131), and the sliding grooves (1131) are matched with the sliding member (34) so ​​that the barrier member (3) can slide along the direction of the sliding grooves (1131).

5. The damping structure according to claim 1, characterized in that: The opening of the housing (2) is sealed by a sealing cover (4).

6. The damping structure according to claim 5, characterized in that: The first shaft section (11) is cylindrical, and its outer wall is rotary cut with the end surface of the convex rib (21), and comprises a first end (114) and a second end (115), wherein the first end (114) abuts against the bottom wall of the shell (2), and the second end (115) abuts against the sealing cover (4).

7. The damping structure according to claim 6, characterized in that: A circular ring (1151) is protruded along the circumferential direction at the second end (115) of the first shaft section (11); the outer diameter of the circular ring (1151) is equal to the inner diameter of the shell (2), so that the rotating shaft (1) can be inserted into and covered at the opening of the shell (2).

8. The damping structure according to claim 7, characterized in that: A gasket (6) is provided between the sealing cover (4) and the circular ring (1151).

9. The damping structure according to claim 1, characterized in that: A convex column (1141) is axially protruded at the first end (114) of the rotating shaft (1), and a groove is axially recessed on the inner bottom wall of the shell (2); the groove and the convex column (1141) are matched to each other, so that the rotating shaft (1) can rotate relative to the shell (2).

10. The damping structure according to claim 1, characterized in that: A fixing block (24) is protruded along the axial direction on the outer bottom wall of the shell (2) and is used to fix the shell (2).

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