Spring sleeve type automatic gap adjusting mechanism with protection function

Abstract

The spring sleeve type automatic gap adjusting mechanism with the protection function comprises a pull rod, a cylinder body, a spring sleeve, a sleeve, a spring, a supporting sleeve and a hole check ring, the pull rod is installed in the cylinder body, the spring sleeve is installed on the outer circle face of the pull rod, the sleeve is installed on the outer sides of the pull rod and the spring sleeve in a sleeving mode, one side of the spring sleeve abuts against the inner wall of the sleeve, and the other side of the spring sleeve abuts against the inner wall of the sleeve. The spring is installed outside the sleeve and abuts against a boss of the sleeve, the side, away from the boss of the sleeve, of the spring abuts against the side face of the inner wall of the cylinder body, the pull rod is sleeved with the supporting sleeve which is of a cap-shaped structure on the whole, the opening side of the supporting sleeve stretches into the sleeve and abuts against the spring sleeve, and a boss is arranged in the middle of the supporting sleeve. One side of the boss of the supporting sleeve abuts against the boss of the sleeve, the closed side of the supporting sleeve wraps the pull rod, the hole check ring is installed in the cylinder body and abuts against the boss of the supporting sleeve, dust, water and other impurities can be effectively prevented from entering the automatic gap adjusting mechanism, the good protection effect is achieved, and the brake working gap and the airplane wheel brake performance are guaranteed.

Description

Technical Field

[0001] The invention relates to the technical field of aircraft wheel brakes, and in particular to a spring sleeve type automatic clearance adjustment mechanism with a protective function. Background Art

[0002] At present, the automatic gap adjustment mechanism mainly includes clamp type, elastic chuck type and spring sleeve type structures. The current aircraft wheels mainly adopt the spring sleeve structure; the automatic gap adjustment mechanism is installed in the cylinder body of the brake device, and is used to automatically adjust the brake working gap; after multiple braking, the brake working gap increases due to the wear of the friction material, and the automatic gap adjustment mechanism can automatically compensate for the brake working gap, so that the brake working gap is always maintained within the required range, thereby ensuring the braking performance and improving the braking sensitivity; and the existing spring sleeve type automatic gap adjustment mechanism can directly contact the natural environment, which can easily cause impurities such as dust and moisture to enter the automatic gap adjustment mechanism and affect the braking performance. Summary of the invention

[0003] In order to solve the problems mentioned in the above background technology, the present invention provides a spring sleeve type automatic gap adjustment mechanism with a protective function.

[0004] The present invention discloses the following technical scheme: a spring sleeve type automatic gap adjustment mechanism with a protective function, comprising a pull rod, a cylinder body, a spring sleeve, a sleeve, a spring, a support sleeve and a hole retaining ring, the pull rod is installed in the cylinder body, the spring sleeve is installed on the outer circular surface of the pull rod, the sleeve is sleeved on the outside of the pull rod and the spring sleeve, one side of the spring sleeve abuts against the inner wall of the sleeve, the spring is installed outside the sleeve and abuts against the boss of the sleeve, the side of the spring away from the boss of the sleeve abuts against the side of the inner wall of the cylinder body, the support sleeve is sleeved outside the pull rod and has a hat-shaped structure as a whole, the open side of the support sleeve extends into the sleeve and abuts against the spring sleeve, the middle part of the support sleeve is a boss, one side of the boss of the support sleeve abuts against the boss of the sleeve, the closed side of the support sleeve wraps the pull rod, and the hole retaining ring is installed in the cylinder body and abuts against the boss of the support sleeve.

[0005] Furthermore, the outer circumferential surface of the boss of the support sleeve is interference fit with the inner wall of the cylinder body.

[0006] Furthermore, the support sleeve and the pull rod are clearance-fitted.

[0007] Beneficial effect: Compared with the prior art, the spring sleeve type automatic clearance adjustment mechanism with a protective function of the present invention can solve the problem that the automatic clearance adjustment mechanism of the aircraft wheel brake device is directly exposed to the natural environment, which easily causes dust, moisture and other impurities to enter the automatic clearance adjustment mechanism, thereby ensuring the braking performance and improving the braking sensitivity. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 It is a schematic diagram of the support sleeve structure of the present invention; In the figure: 1-pull rod, 2-cylinder body, 3-spring sleeve, 4-sleeve, 5-spring, 6-support sleeve, 7-retaining ring for hole. DETAILED DESCRIPTION

[0009] like Figure 1 to Figure 2 As shown, a spring sleeve type automatic gap adjustment mechanism with a protective function comprises a pull rod 1, a cylinder body 2, a spring sleeve 3, a sleeve 4, a spring 5, a support sleeve 6 and a hole retaining ring 7, wherein the pull rod 1 is installed in the cylinder body 2, the spring sleeve 3 is installed on the outer circumference of the pull rod 1, the sleeve 4 is sleeved on the outside of the pull rod 1 and the spring sleeve 3, one side of the spring sleeve 3 abuts against the inner wall of the sleeve 4, the spring 5 is installed outside the sleeve 4 and abuts against the boss of the sleeve 4, the side of the spring 5 away from the boss of the sleeve 4 abuts against the side of the inner wall of the cylinder body 2, and the spring 5 gives The sleeve 4 provides elastic force to ensure the rebound position of the sleeve 4. The support sleeve 6 is sleeved on the outside of the pull rod 1 and has a hat-shaped structure as a whole. The open side of the support sleeve 6 extends into the sleeve 4 and abuts against the spring sleeve 3. The middle part of the support sleeve 6 is a boss. One side of the boss of the support sleeve 6 abuts against the boss of the sleeve 4. The closed side of the support sleeve 6 wraps around the pull rod 1 to prevent impurities from entering the gap adjustment mechanism, which plays a good protective role. The hole retaining ring 7 is installed in the cylinder body 2 and abuts against the boss of the support sleeve 6. The hole retaining ring 7 can limit the support sleeve 6.

[0010] The outer cylindrical surface of the boss of the support sleeve 6 is interference fit with the inner wall of the cylinder body 2, which effectively prevents impurities from entering and improves the protection performance; the support sleeve 6 and the pull rod 1 are clearance fit, ensuring that the pull rod 1 slides normally in the cylinder body 2 without affecting the braking performance.

[0011] Adding a cap-shaped support sleeve 6 between the sleeve 4 and the hole retaining ring 7 can effectively prevent dust, moisture and other impurities in the natural environment from entering the automatic gap adjustment mechanism, play a good protective role for the gap adjustment mechanism, ensure the brake working clearance, improve the wheel braking performance, improve the brake sensitivity, and is easy to install and practical.

[0012] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A spring sleeve type automatic gap adjustment mechanism with a protective function, comprising a pull rod (1), a cylinder (2), a spring sleeve (3), a sleeve (4), a spring (5), a support sleeve (6) and a hole retaining ring (7), wherein the pull rod (1) is installed in the cylinder (2), the spring sleeve (3) is installed on the outer circumference of the pull rod (1), the sleeve (4) is sleeved on the outside of the pull rod (1) and the spring sleeve (3), one side of the spring sleeve (3) abuts against the inner wall of the sleeve (4), the spring (5) is installed outside the sleeve (4) and abuts against the boss of the sleeve (4), and the side of the spring (5) away from the boss of the sleeve (4) abuts against the inner wall side of the cylinder (2), characterized in that: The support sleeve (6) is sleeved outside the pull rod (1) and has an overall cap-shaped structure. The open side of the support sleeve (6) extends into the sleeve (4) and abuts against the spring sleeve (3). The middle part of the support sleeve (6) is a boss. One side of the boss of the support sleeve (6) abuts against the boss of the sleeve (4). The closed side of the support sleeve (6) wraps around the pull rod (1). The hole retaining ring (7) is installed in the cylinder body (2) and abuts against the boss of the support sleeve (6).

2. The spring sleeve type automatic gap adjustment mechanism with protective function according to claim 1, characterized in that: The outer cylindrical surface of the boss of the support sleeve (6) is interference fit with the inner wall of the cylinder body (2).

3. The spring sleeve type automatic gap adjustment mechanism with protective function according to claim 1, characterized in that: The support sleeve (6) and the pull rod (1) are clearance-fitted.

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