Ball sliding rail buffering and limiting device with failure prevention function

Abstract

The utility model discloses a ball sliding rail buffering and limiting device with an anti-failure function, and belongs to the technical field of sliding rail structures. The ball sliding rail buffering and limiting device with the failure prevention function comprises a limiting assembly arranged at the tail end of an outer sliding rail, and a rivet and a push block which are arranged at the tail end of an inner sliding rail; the limiting assembly comprises a limiting check block. According to the ball sliding rail buffering and limiting device with the failure prevention function, through the arrangement of a reset block and a push block, when the position of a limiting check block moves due to shaking of an outer sliding rail, and the limiting check block is in a vertical state, the push block at the tail end of the inner sliding rail is attached to the outer surface of the reset block in the recovery process of the inner sliding rail, and the reset block is reset; the push block pushes the limiting stop block to move while sliding on the surface of the reset block, so that the limiting stop block is reset at a normal working position of 30 degrees, and the situation that the stop block automatically rotates to a vertical position due to vibration, and consequently rivets of the inner rail cannot be pushed into a groove of the stop block is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of slide rail structures, in particular to a ball slide rail buffer limit device with an anti-failure function. Background Art

[0002] Ball slides, also known as rolling guides, are high-precision, high-stability motion guidance systems. They utilize balls rolling between rails to provide smooth, precise, and stable guidance and support for moving parts. The ball slide design allows moving parts to bear weight and provides a smooth and stable motion path. The rolling contact significantly reduces frictional resistance, improving motion efficiency and precision.

[0003] For example, in the Chinese patent publication number CN218935032U, a ball bearing slide rail with a buffering and limiting mechanism is provided, comprising an outer slide rail, an inner slide rail, and a middle slide rail arranged between the outer and inner slide rails, balls are arranged between the outer and middle slide rails and between the inner and middle slide rails, and a limiting block is arranged on the outer slide rail for preventing the middle slide rail from falling off, and the outer slide rail is also provided with a buffering and limiting mechanism for preventing the inner slide rail from falling off, the buffering and limiting mechanism comprises a rotatable limiting device, a stop column cooperating with the limiting device, and an angle control mechanism for controlling the rotation angle of the limiting device, the limiting device is rotatably arranged on the outer slide rail through a pin shaft, and the stop column is installed on the inner slide rail. The device has the effect of generating a buffering force on the inner slide rail during braking, causing the running speed of the inner slide rail to slowly decrease and eventually stop, effectively reducing the impact force during braking, improving the safety and stability of the slide rail braking, and improving the service life.

[0004] However, when the ball bearing slide is in use, when the middle rail is pushed, the slide rail will vibrate, causing the stopper to automatically rotate to a vertical position due to the vibration, resulting in the rivets of the inner rail not being able to be pushed into the groove of the stopper, and the buffer limit of this stopper will fail. Utility Model Content

[0005] In response to the problems existing in the above-mentioned prior art, the utility model provides a ball bearing slide rail buffer limit device with an anti-failure function, which has the technical effect of preventing the block position from moving due to vibration and causing the block to fail.

[0006] In order to solve the above technical problems and achieve the above technical effects, the present invention is implemented through the following technical solutions:

[0007] The technical solution of the utility model is: a ball bearing slide rail buffer limit device with an anti-failure function, comprising a limit assembly arranged at the tail end of the outer slide rail, and a rivet and a push block arranged at the tail end of the inner slide rail; the limit assembly comprises a limit block, the limit block is rotatably connected to the tail end of the outer slide rail through a block rotating shaft, and the bottom end of the block rotating shaft is rotatably connected to the inner wall of the outer slide rail, one end of the upper surface of the limit block is provided with a limit block, the tail end of the inner slide rail is provided with a rivet, and a guide groove for accommodating the rivet is opened inside the limit block. A reset block adapted to the push block is provided on one side of the tail end of the upper surface of the limit stop block, a push block adapted to the reset block is provided on the inner wall of the tail end of the inner slide rail, an arc groove for the movement of the limit stop block is provided on the inner wall of the tail end of the outer slide rail, and a sliding block slidably connected to the arc groove is provided on one end of the lower surface of the limit stop block; the limit stop block has an initial state and a working state, when the limit stop block is in the initial state, the rivet is separated from the limit block, and when the limit stop block is in the working state, the rivet contacts the inner wall of the guide groove.

[0008] Furthermore, the top end of the arc-shaped groove is 90°, and the bottom end of the arc-shaped groove is 60°.

[0009] Furthermore, a mounting hole adapted to the rivet is provided on the inner slide rail, and the rivet is fixedly connected to the mounting hole inside the inner slide rail by riveting.

[0010] Furthermore, the outer side surface of the reset block is arranged in an arc shape, and the inner wall of the reset block is arranged in an inclined shape.

[0011] Furthermore, the middle slide rail is slidably connected to the outer slide rail via balls.

[0012] Furthermore, a movable groove is provided inside the limit stopper and on one side of the stopper shaft, and a friction block is slidably provided in the movable groove, and auxiliary blocks are fixedly installed on the lower surface of the limit stopper and on both sides of the friction block.

[0013] Furthermore, the friction block is arranged in a concave cylindrical shape, and a support spring is telescopically arranged between the inner wall of the friction block and the inner wall of the movable groove.

[0014] Furthermore, a protrusion capable of assisting the installation of the support spring is provided at the top end of the movable groove.

[0015] Furthermore, a groove adapted to the stopper shaft is provided on the upper surface of the limit stopper.

[0016] Furthermore, the four corners of the limit stop are all arranged in an arc shape.

[0017] The beneficial technical effect of the present invention is that: through the arrangement of the reset block and the push block, when the limit block moves due to the shaking of the outer slide rail itself, so that the limit block is in a vertical state, at this time, the inner slide rail is in the recovery process, and the push block at the tail end of the inner slide rail fits the outer surface of the reset block. The push block pushes the limit block to move while sliding on the surface of the reset block, so that the limit block is reset to a normal working position of 30°. Then the rivet contacts the limit block, the rivet enters the inner wall of the limit block for guidance, and pushes the limit block to move, so that it limits the inner slide rail, while still ensuring that the inner slide rail is prevented from falling off, it also avoids the block automatically rotating to the vertical position due to vibration, which causes the rivet of the inner rail to fail to be pushed into the groove of the block. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of a three-dimensional cross-section of the structure of the utility model;

[0019] Figure 2 This utility model Figure 1 A three-dimensional schematic diagram of the structure of the middle limit stop;

[0020] Figure 3 This is a side cross-sectional schematic diagram of the structure of the limit stopper and the support spring of the utility model;

[0021] Figure 4 This is a schematic front view of the structure of the limit assembly of the utility model;

[0022] Figure 5 This is a schematic front view of the structure of the limit assembly of the utility model;

[0023] Figure 6 This is a schematic structural perspective view of the sliding block and auxiliary block of the utility model;

[0024] Figure 7 This is a schematic diagram of the working state of the limit assembly of the utility model;

[0025] Figure 8 It is a schematic front view cross-sectional diagram of the structure of the sliding block and the auxiliary block of the utility model.

[0026] The numbers and letters in the figure represent the corresponding component names:

[0027] 1. Outer slide rail; 11. Arc groove; 2. Inner slide rail; 21. Push block; 22. Rivet; 3. Limit block; 31. Block shaft; 32. Limit block; 33. Reset block; 34. Friction block; 35. Support spring; 36. Movable groove; 37. Auxiliary block; 38. Sliding block; 4. Middle slide rail. DETAILED DESCRIPTION

[0028] In order to more clearly understand the technical means of the present invention and implement it according to the contents of the specification, the specific implementation methods of the present invention are further described in detail below in conjunction with the drawings and examples. The following examples are used to illustrate the present invention but are not used to limit the scope of the present invention.

[0029] See attached Figure 1-8 As shown, a ball bearing slide rail buffer limit device with anti-failure function includes a limit assembly arranged at the tail end of the outer slide rail 1, and a rivet 22 and a push block 21 arranged at the tail end of the inner slide rail 2.

[0030] The limit assembly includes a limit stopper 3, which is rotatably connected to the tail end of the outer slide rail 1 through a stopper shaft 31. The four corners of the limit stopper 3 are all arc-shaped. The bottom end of the stopper shaft 31 is rotatably connected to the inner wall of the outer slide rail 1. The upper surface of the limit stopper 3 is provided with a groove adapted to the stopper shaft 31. A limit block 32 is provided at one end of the upper surface of the limit stopper 3. A rivet 22 is provided at the tail end of the inner slide rail 2. A guide groove for accommodating the rivet 22 is provided inside the limit block 32. A mounting hole adapted to the rivet 22 is provided on the inner slide rail 2. The rivet 22 is fixedly connected to the mounting hole inside the inner slide rail 2 by riveting.

[0031] A reset block 33 that is compatible with the push block 21 is provided on one side of the tail end of the upper surface of the limit stop block 3. The outer side surface of the reset block 33 is arranged in an arc shape, and the inner wall of the reset block 33 is arranged in an inclined shape. The inner wall of the tail end of the inner slide rail 2 is provided with a push block 21 that is compatible with the reset block 33. The inner wall of the tail end of the outer slide rail 1 is provided with an arc groove 11 for the movement of the limit stop block 3. One end of the lower surface of the limit stop block 3 is provided with a sliding block 38 that is slidably connected to the arc groove 11.

[0032] By setting the top end of the arc groove 11 at 90° and the bottom end at 60° and limiting the position accordingly, the sliding block 38 has an internal movable space of 30° in the arc groove 11, preventing the limit block 3 from rotating too much.

[0033] The limit stopper 3 has an initial state and a working state. When the limit stopper 3 is in the initial state, the push block 21 is separated from the reset block 33 . When the limit stopper 3 is in the working state, the push block 21 is in contact with the inner wall of the reset block 33 .

[0034] When the inner rail 2 is in the vertical position, the limit block 32 can limit the rivet 22 to prevent the inner rail 2 from falling off.

[0035] When the limit stopper 3 is in a vertical state due to vibration, it is an abnormal standby position. At this time, during the retraction of the inner slide rail 2, the pushing block 21 at the tail end of the inner slide rail 2 first contacts the reset block 33, and then the inner wall of the pushing block 21 fits the outer wall of the reset block 33, sliding through the arc surface while pushing the tail end of the limit stopper 3 to move, so that the limit stopper 3 rotates around the stopper shaft 31 as the center while the limit block 32 moves inward, thereby achieving the inclined state of the limit stopper 3. At this time, the inner slide rail 2 drives the rivet 22 to continue to move, and the rivet 22 at the tail end of the inner slide rail 2 will push the limit stopper 3 to rotate through the inner wall of the limit block 32, so that after the limit stopper 3 rotates and reaches the vertical state, the limit block 32 can limit the rivet 22 to prevent the inner slide rail 2 from falling off.

[0036] A movable groove 36 is provided inside the limit stopper 3 and on one side of the stopper shaft 31, and a friction block 34 is slidably provided in the movable groove 36. Auxiliary blocks 37 are fixedly installed on the lower surface of the limit stopper 3 and on both sides of the friction block 34. The friction block 34 is concave cylindrical, and a support spring 35 is telescopically provided between the inner wall of the friction block 34 and the inner wall of the movable groove 36. A protrusion that can assist in the installation of the support spring 35 is provided at the top end of the movable groove 36.

[0037] By setting the auxiliary block 37, the friction block 34 can be blocked to prevent the elasticity of the support spring 35 from being too large, resulting in a large damping feeling between the friction block 34 and the inner wall of the outer slide rail 1, affecting the normal use of the limit block 3. After the push block 21 pushes the reset block 33 to move to the maximum position, the push block 21 continues to push the reset block 33, which will cause the support spring 35 to be stressed and contracted. Then, one end of the limit block 3 moves downward, so that the push block 21 can continue to move along the upper surface of the reset block 33, which does not affect the use effect of the limit block 3 and has the function of resetting the limit block 3 to avoid failure of the limit block 3.

[0038] By setting a support spring 35, a supporting force can be provided to the friction block 34, so that the bottom end of the friction block 34 contacts the inner wall of the outer slide rail 1, increasing the friction force, so that the limit block 3 will not be affected by slight shaking when moving, causing the limit block 3 to move on its own, thereby increasing the stability of the limit block 3.

[0039] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. It should be pointed out that ordinary technicians in this technical field can make several improvements and modifications without departing from the technical principles of the present invention. These improvements and modifications should also be regarded as within the scope of protection of the present invention.

Claims

1. A ball bearing slide rail buffer limit device with anti-failure function, characterized in that: include: A limit assembly provided at the tail end of the outer slide rail (1), and a rivet (22) and a push block (21) provided at the tail end of the inner slide rail (2); The limit assembly includes a limit block (3), the limit block (3) is rotatably connected to the tail end of the outer slide rail (1) through a block rotating shaft (31), and the bottom end of the block rotating shaft (31) is rotatably connected to the inner wall of the outer slide rail (1), one end of the upper surface of the limit block (3) is provided with a limit block (32), the inside of the limit block (32) is provided with a guide groove for accommodating the rivet (22), one side of the tail end of the upper surface of the limit block (3) is provided with a reset block (33) adapted to the push block (21), the inner wall of the tail end of the outer slide rail (1) is provided with an arc groove (11) for the limit block (3) to move, and one end of the lower surface of the limit block (3) is provided with a sliding block (38) slidably connected to the arc groove (11); The limit block (3) has an initial state and a working state. When the limit block (3) is in the initial state, the rivet (22) is separated from the limit block (32). When the limit block (3) is in the working state, the rivet (22) is in contact with the inner wall of the guide groove.

2. The ball bearing slide rail buffering and limiting device with anti-failure function according to claim 1 is characterized in that: The top end of the arc-shaped groove (11) is 90°, and the bottom end of the arc-shaped groove (11) is 60°.

3. The ball bearing slide rail buffering and limiting device with anti-failure function according to claim 2, characterized in that: The inner slide rail (2) is provided with a mounting hole adapted to the rivet (22), and the rivet (22) is fixedly connected to the mounting hole inside the inner slide rail (2) by riveting.

4. The ball bearing slide rail buffering and limiting device with anti-failure function according to claim 1, characterized in that: The outer side surface of the reset block (33) is arranged in an arc shape, and the inner wall of the reset block (33) is arranged in an inclined shape.

5. The ball bearing slide rail buffering and limiting device with anti-failure function according to claim 3, characterized in that: The middle slide rail (4) is slidably connected to the outer slide rail (1) via balls.

6. The ball bearing slide rail buffer and limit device with anti-failure function according to claim 1, characterized in that: A movable groove (36) is provided inside the limit stopper (3) and on one side of the stopper shaft (31), and a friction block (34) is slidably provided in the movable groove (36). Auxiliary blocks (37) are fixedly installed on the lower surface of the limit stopper (3) and on both sides of the friction block (34).

7. The ball bearing slide rail buffering and limiting device with anti-failure function according to claim 6, characterized in that: The friction block (34) is arranged in a concave cylindrical shape, and a support spring (35) is telescopically arranged between the inner wall of the friction block (34) and the inner wall of the movable groove (36).

8. The ball bearing slide rail buffer and limit device with anti-failure function according to claim 7, characterized in that: A protrusion capable of assisting the installation of the support spring (35) is provided at the top end of the movable groove (36).

9. The ball bearing slide rail buffer and limit device with anti-failure function according to claim 1, characterized in that: The upper surface of the limit stopper (3) is provided with a groove adapted to the stopper shaft (31).

10. The ball bearing slide rail buffer and limit device with anti-failure function according to claim 1, characterized in that: The four corners of the limit stopper (3) are all arranged in an arc shape.

Images