Civil air defense door rotating arm support

Abstract

The utility model discloses a civil defense door rocker arm support, which relates to the technical field of supports and comprises a base, a rocker arm hole I is formed in the middle of the upper surface of the base, mounting holes are formed in corners of the upper surface of the base, and a U-shaped seat is arranged on the upper surface of the base. A second rotating arm hole which is communicated up and down is formed in the middle of the U-shaped seat in the horizontal direction, a rubber wear-resisting pad is fixedly connected to the inner wall of the second rotating arm hole, and an oil inlet hopper is fixedly connected to the middle of the U-shaped seat in the horizontal direction. Through mutual cooperation of a movable assembly, a T-shaped sliding block, a T-shaped groove, a cam and an L-shaped stop block, the rotating arm can drive a first circular plate to rotate when rotating through the arrangement of the movable assembly, a plurality of steel balls are made to roll, the phenomenon of friction force is reduced when the rotating arm rotates, and therefore the flexibility effect of the rotating arm in the rotating process is improved, and the service life of the rotating arm is prolonged. Through the arrangement of the T-shaped sliding block and the T-shaped groove, loading and unloading operation is facilitated, and at the moment, the arrangement of the cam has a position limiting effect.

Description

TECHNICAL FIELD

[0001] The utility model relates to support technical field, concretely relates to a civil air defense door rotating arm support. BACKGROUND

[0002] The civil air defense door is the door of the entrance and exit of the people's air defense engineering, and the civil air defense door is classified as the ordinary single and double-leaf protective airtight door and airtight door, the movable threshold single and double-leaf protective airtight door and airtight door and various civil air defense equipment, due to the use nature, the civil air defense door is usually heavy, and is mainly composed of a civil air defense door body, a rotating arm, a rotating arm support and a door frame.

[0003] According to patent publication No. CN214697406U, a civil air defense door rotating arm support is disclosed, which relates to the technical field of support. The civil air defense door rotating arm support includes a support plate and a base, the support plate is slidably connected to the top end of the base, the top surface of the base is provided with a mounting groove, and the bottom surface of the base is provided with a fixing groove, the bottom end of the support plate is fixedly connected with a fixing block, and the fixing block is slidably connected in the inside of the fixing groove. The civil air defense door rotating arm support firstly assembles the device, installs the support plate into the mounting groove on the base, when the fixing block is located at the position of the fixing groove, moves the support plate to the specified position, when moving, the support plate can move more smoothly under the cooperation of the sliding plate and the sliding groove, and the stability of the support plate is further enhanced, so that the inclination and bending of the support plate during the assembly of the civil air defense door are avoided, the normal use of the device is affected, and if a single part is damaged, the device can be quickly disassembled for maintenance and replacement. The existing technology has the following problems:

[0004] In the structure of the above publication No. CN214697406U, the rotating arm is movable in the inside through the fixing hole, and the bottom thereof directly contacts the surface of the base. During rotation, mutual friction occurs between the two, which can cause serious wear after long-term use, and the civil air defense door is not flexible enough when opening and closing. UTILITY MODEL CONTENTS

[0005] The utility model provides a civil air defense door rotating arm support to solve the problems in the above background technology.

[0006] To solve the above technical problems, the utility model adopts the technical scheme of:

[0007] A civil air defense door rotating arm support, including a base, a rotating arm hole one is set up in the middle of the upper surface of the base, installation holes are set up in the corner of the upper surface of the base, and a U-shaped seat is arranged on the upper surface of the base.

[0008] The horizontal middle part of the U-shaped seat is provided with a rotating arm hole two, the inner wall of the rotating arm hole two is fixedly connected with a rubber wear pad, the horizontal middle part of the U-shaped seat is fixedly connected with an oil inlet hopper, the vertical lower end of the U-shaped seat is fixedly connected with T-shaped sliding blocks on the left and right sides, the upper surface of the base is provided with T-shaped grooves on the left and right sides, the outer surfaces of the T-shaped sliding blocks on the left and right sides are respectively and slidably connected with the interiors of the T-shaped grooves, the left and right sides of the front surface of the base close to the T-shaped grooves are fixedly connected with L-shaped blocking blocks, the interior of the rotating arm hole one is provided with a movable assembly, the movable assembly comprises a circular plate one and a circular plate two, and the lower surface of the circular plate two is fixedly connected with the lower surface of the inner wall of the rotating arm hole one.

[0009] The further improvement of the technical scheme of the utility model lies in that the outer surface diameter of the oil inlet hopper is larger than the inner wall diameter of the rotating arm hole two, and the length of the T-shaped sliding block is the same as the length of the T-shaped groove.

[0010] The further improvement of the technical scheme of the utility model lies in that the front middle part of the T-shaped sliding block on the left and right sides is movably connected with a cam, and the outer surface of the cam is overlapped with the inner side of the L-shaped blocking block.

[0011] The further improvement of the technical scheme of the utility model lies in that the upper surface of the circular plate two is provided with an annular groove one away from the central part, a plurality of steel balls are movably connected in an annular array in the interior of the annular groove one, and the outer surfaces of the plurality of steel balls extend to the exterior of the annular groove one.

[0012] The further improvement of the technical scheme of the utility model lies in that the upper surface of the circular plate two is fixedly connected with a connecting shaft, and the outer surface of the connecting shaft is fixedly connected with an anti-falling ring above.

[0013] The further improvement of the technical scheme of the utility model lies in that the upper surface of the connecting shaft and the upper surface of the anti-falling ring are in a horizontal linear state.

[0014] The further improvement of the technical scheme of the utility model lies in that the upper surface of the circular plate one is overlapped with the rotating arm bottom, the lower surface of the circular plate one is provided with an annular groove two away from the central part, the interior of the annular groove two corresponds to the interior of the annular groove one, the interior of the annular groove two is movably connected with the outer surfaces of the plurality of steel balls, the lower surface of the circular plate one is provided with a rotating opening, the inner wall of the rotating opening is provided with an anti-falling groove above, the inner wall diameter of the anti-falling groove is larger than the inner wall diameter of the rotating opening, and the interiors of the rotating opening and the anti-falling groove are movably connected with the outer surfaces of the connecting shaft and the anti-falling ring respectively.

[0015] Due to the adoption of the above technical scheme, the utility model has the following technical progress compared with the prior art:

[0016] 1. This utility model provides a swing arm support for a civil defense door, which adopts the cooperation of movable components, T-shaped sliders, T-shaped grooves, cams, and L-shaped blocking blocks. The movable components cause the circular plate to rotate when the swing arm rotates, causing several steel balls to roll, thereby reducing friction when the swing arm rotates and improving the flexibility of the swing arm during rotation. The T-shaped sliders and T-shaped grooves facilitate loading and unloading operations, while the cams provide position restriction.

[0017] 2. This utility model provides a swing arm support for a civil defense door, which adopts an oil inlet hopper. This allows for the placement of a small amount of lubricating oil by personnel after prolonged use. The oil inlet hopper concentrates the lubricating oil in the gap between the wear-resistant rubber pad and the swing arm, facilitating lubrication. At the same time, the lubricating oil drips from the gap into the swing arm hole and contacts the moving components for lubrication. This structure reduces the friction generated after the swing arm rotates. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of this utility model;

[0019] Figure 2 This is an exploded structural diagram of the base and U-shaped seat of this utility model;

[0020] Figure 3 This is an exploded view of the active components of this utility model;

[0021] Figure 4 This is a schematic diagram of the lower surface structure of the circular plate of this utility model.

[0022] In the diagram: 1. Base; 11. Movable component; 111. Circular plate one; 112. Circular plate two; 113. Annular groove one; 114. Steel ball; 115. Connecting shaft; 1101. Annular groove two; 1102. Rotating port; 1103. Anti-detachment groove; 12. T-slot; 13. L-shaped blocking block; 2. Rotary arm hole one; 3. U-shaped seat; 31. Rotary arm hole two; 32. Rubber wear-resistant pad; 33. Oil inlet hopper; 34. T-shaped slider; 35. Cam; 4. Mounting hole. Detailed Implementation

[0023] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0024] Example 1: As Figures 1 to 2The utility model provides a civil air defence door swing arm support, base 1 and U -shaped seat 3 constitute, the swing arm hole one 2 of the middle part of the upper surface of base 1 is set, the aperture is adapted to the size of swing arm design, so that swing arm can rotate smoothly, the corner of the upper surface of base 1 is evenly provided with four mounting holes 4, and the mounting hole 4 is the threaded hole, and it is convenient for base 1 fixed installation proper position, the upper surface of base 1 is provided with T -shaped groove 12 respectively on the left side and the right side, the length of T -shaped groove 12 is same with the length of T -shaped slider 34 of the lower end of U -shaped seat 3, guarantees that T -shaped slider 34 can smoothly slide in T -shaped groove 12, the swing arm hole two 31 of the middle part of the horizontal direction of U -shaped seat 3, the inner wall of swing arm hole two 31 is fixedly connected with rubber wear -resistant pad 32 by the mode of sticking, and the thickness of rubber wear -resistant pad 32 is moderate, plays buffer and reduces the wear and tear between swing arm and the inner wall of swing arm hole two 31.

[0025] The horizontal direction middle part of U -shaped seat 3 is fixed with oil inlet 33, and the outer surface diameter of oil inlet 33 is greater than the inner wall diameter of swing arm hole two 31, which facilitates the entry of lubricating oil to further reduce the friction when the swing arm rotates, the vertical direction lower end of U -shaped seat 3 is fixedly connected with T -shaped slider 34 on the left and right sides, and the T -shaped slider 34 is slidably connected with the T -shaped groove 12, so that the U -shaped seat 3 can be slidably mounted and dismounted on the base 1, and the L -shaped blocking block 13 is welded on the side close to the T -shaped groove 12 on the left and right sides of the front of the base 1, and the cam 35 is movably connected to the middle part of the front of the T -shaped slider 34 on the left and right sides, the outer surface of the cam 35 is lapped with the inner side of the L -shaped blocking block 13, and the cooperation of the L -shaped blocking block 13 and the cam 35 has the limiting effect on the T -shaped slider, when the position of the U -shaped seat 3 needs to be installed, the U -shaped seat 3 can be pushed to make the T -shaped slider 34 slide in the T -shaped groove 12, and the limiting block of the cam 35 and the L -shaped blocking block 13, so as to realize the mounting and replacement of the U -shaped seat 3.

[0026] Embodiment two: as Figures 3 to 4As shown, the inside of the rotating arm hole one 2 is provided with a movable assembly 11, which includes a circular plate one 111 and a circular plate two 112. The lower surface of the circular plate two 112 is fixedly connected with the lower surface of the inner wall of the rotating arm hole one 2 by welding. The upper surface of the circular plate two 112 is provided with an annular groove one 113 away from the central part. A plurality of steel balls 114 are movably connected in the annular groove one 113 in an annular array. The diameter of the steel balls 114 is selected according to the size of the annular groove one 113. The outer surfaces of the steel balls 114 extend to the outside of the annular groove one 113, which cooperates with the annular groove two 1101 on the lower surface of the circular plate one 111 to realize the relative rotation between the circular plate one 111 and the circular plate two 112. The upper surface of the circular plate one 111 is overlapped with the bottom of the rotating arm. The lower surface of the circular plate one 111 is provided with a rotating port 1102. The inner wall of the rotating port 1102 is provided with an anti-falling groove 1103. The inner wall diameter of the anti-falling groove 1103 is larger than that of the rotating port 1102. The upper surface of the connecting shaft 115 is welded with an anti-falling ring. The upper surfaces of the connecting shaft 115 and the anti-falling ring are in a horizontal straight line state, so that the stability of the connection is ensured. The connecting shaft 115 and the anti-falling ring are movably arranged in the rotating port 1102 and the anti-falling groove 1103, respectively. The anti-falling ring is arranged to prevent the two circular plates from falling off as a whole.

[0027] In actual installation, the rotating arm is inserted through the rotating arm hole one 2 and the rotating arm hole two 31, and the bottom of the rotating arm is overlapped with the upper surface of the middle part of the circular plate one 111. The rolling of the steel balls 114 in the annular groove one 113 and the annular groove two 1101 realizes the flexible rotation of the rotating arm. At the same time, lubricating oil can be injected into the oil inlet 33 as needed to reduce the friction between the rotating arm and the rubber wear pad 32.

[0028] In the embodiment three, the structure of the movable assembly 11 is optimized based on the embodiment two. The steel balls 114 are made of high-strength wear-resistant steel material, which further reduces the friction between the steel balls 114 and the annular groove one 113 and the annular groove two 1101. At the same time, a layer of wear-resistant coating is coated on the surfaces of the circular plate one 111 and the circular plate two 112 to improve the wear resistance of the movable assembly 11. In actual use, the steel balls 114 roll in the annular groove one 113 and the annular groove two 1101 to reduce the friction during the rotation of the rotating arm.

[0029] Working principle: the design of oil inlet 33 allows injection of lubricating oil or grease, with rubber wear pad 32 to reduce the friction of the rotating arm. Lubricating oil drops to the rotating arm hole 2, lubricating the moving assembly 11. The rotating arm rotates the circular plate 111, and the steel ball 114 rolls, further reducing friction. When installing the U-shaped seat 3, push it to make the T-shaped slider 34 slide in the T-shaped groove 12, and through the cam 35 to rotate the L-shaped blocking block 13 inside the limit to complete the installation.

[0030] The above is a detailed description of the general utility model, but some modifications or improvements can be made on the basis of the utility model, which is obvious to those skilled in the art. Therefore, without departing from the spirit of the utility model, the modification or improvement is within the scope of the utility model.

Claims

1. A pivoting arm support for a blast door, comprising a base (1), characterised in that: The upper surface of the base (1) is provided with a rotating arm hole one (2), and the upper surface of the base (1) is provided with mounting holes (4) at the corners. The horizontal direction of the U-shaped seat (3) is provided with a rotating arm hole two (31), and the inner wall of the rotating arm hole two (31) is fixedly connected with a rubber wear pad (32). The horizontal direction of the U-shaped seat (3) is fixedly connected with an oil inlet hopper (33). The vertical direction of the U-shaped seat (3) is fixedly connected with T-shaped sliding blocks (34) on the left and right sides. The upper surface of the base (1) is provided with T-shaped grooves (12) on the left and right sides. The outer surfaces of the T-shaped sliding blocks (34) on the left and right sides are respectively and slidably connected with the interiors of the T-shaped grooves (12). The front surface of the base (1) is fixedly connected with L-shaped blocking blocks (13) on the left and right sides close to the T-shaped grooves (12). The rotating arm hole one (2) is provided with a movable assembly (11). The movable assembly (11) comprises a circular plate one (111) and a circular plate two (112). The lower surface of the circular plate two (112) is fixedly connected with the inner wall of the rotating arm hole one (2).

2. The pivoting arm support for a civil defense door according to claim 1, wherein: The outer surface diameter of the oil inlet hopper (33) is greater than the inner wall diameter of the rotating arm hole two (31), and the length of the T-shaped sliding block (34) is the same as the length of the T-shaped groove (12).

3. The pivoting arm support for a civil defense door according to claim 1, wherein: The front surfaces of the T-shaped sliding blocks (34) on the left and right sides are movably connected with cams (35) in the middle.

4. The pivoting arm support for a civil defense door according to claim 1, wherein: The upper surface of the circular plate two (112) is provided with an annular groove one (113) away from the central part. A plurality of steel balls (114) are movably connected in the annular groove one (113).

5. The pivoting arm support for a civil defense door according to claim 1, wherein: The upper surface of the circular plate two (112) is fixedly connected with a connecting shaft (115), and the outer surface of the connecting shaft (115) is fixedly connected with an anti-falling ring.

6. The pivoting arm support for a civil defense door according to claim 5, wherein: The upper surface of the connecting shaft (115) is in a horizontal straight line state with the upper surface of the anti-falling ring.

7. The pivoting arm support for a civil defense door according to claim 1, wherein: The upper surface of the circular plate one (111) is connected with the bottom of the rotating arm. The lower surface of the circular plate one (111) is provided with an annular groove two (1101) away from the central part. The interior of the annular groove two (1101) corresponds to the interior of the annular groove one (113). The interior of the annular groove two (1101) is movably connected with the outer surfaces of the steel balls (114). The lower surface of the circular plate one (111) is provided with a rotating port (1102) in the middle. The inner wall of the rotating port (1102) is provided with an anti-falling groove (1103) above. The inner wall diameter of the anti-falling groove (1103) is greater than the inner wall diameter of the rotating port (1102). The interiors of the rotating port (1102) and the anti-falling groove (1103) are movably connected with the outer surfaces of the connecting shaft (115) and the anti-falling ring, respectively.

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