A hydraulic disc brake

Abstract

This utility model discloses a hydraulic disc brake, relating to the field of brake technology. It comprises a cylinder, a piston rod, and a floating rod. The cylinder has a first oil port and a second oil port at its two ends for connecting hydraulic oil. The piston rod axially moves through the cylinder, and a limit ring is fixedly connected to its end. A disc spring abuts against the limit ring and the cylinder. The floating rod extends axially through the piston rod, forming a sealing fit with the inner wall of the piston rod's through-hole. The floating rod can slide relative to the piston rod axially. A brake pad is fixedly connected to the end of the floating rod away from the cylinder. This hydraulic disc brake can compensate for brake pad wear to ensure its braking effect.

Description

Technical Field

[0001] This utility model relates to the field of brake technology, specifically a hydraulic disc brake. Background Technology

[0002] Disc brakes are widely used in industrial machinery, heavy vehicles and other fields due to their stable braking performance and fast response speed.

[0003] Because brake pads wear down over time, the braking power transmission and wear compensation functions of existing brakes are often independent, requiring additional complex compensation mechanisms to correct the clearance after brake pad wear. When brake pads wear down due to long-term friction, if the compensation mechanism does not respond in time or fails, the clearance between the brake pads and the brake disc will increase. This not only prolongs the braking stroke and causes braking lag, but also reduces the braking clamping force, and in severe cases, may even lead to brake failure.

[0004] Therefore, it is necessary to propose a hydraulic disc brake to solve the above problems. Utility Model Content

[0005] (a) Technical problems to be solved

[0006] The purpose of this invention is to provide a hydraulic disc brake that can automatically compensate for brake pad wear, so as to solve the problems mentioned in the background art.

[0007] (II) Technical Solution

[0008] To achieve the above objectives, this utility model provides the following technical solution: a hydraulic disc brake, comprising:

[0009] The cylinder body has a first oil port and a second oil port at each end for connecting hydraulic oil.

[0010] A piston rod is axially movably inserted into the cylinder body. A limit ring is fixedly connected to the end of the piston rod, and a disc spring abuts against the limit ring and the cylinder body.

[0011] A floating rod is provided, which is axially inserted through the piston rod. The floating rod forms a sealing fit with the inner wall of the through hole of the piston rod, and the floating rod can slide relative to the piston rod along its axial direction. A brake pad is fixedly connected to the end of the floating rod away from the cylinder body.

[0012] Preferably, a limiting ring is fixedly connected to the outer side of the end of the floating rod away from the cylinder body, and a limiting retaining ring is fixedly connected to the limiting ring. The limiting retaining ring cooperates with the piston rod to limit the limiting ring.

[0013] Preferably, the axial floating distance of the floating rod relative to the piston rod is less than the axial stroke of the piston rod relative to the cylinder.

[0014] Preferably, a sealing seat is fixedly connected to one end of the piston rod located inside the cylinder, and the piston rod is sealed to the floating rod through the sealing seat.

[0015] Preferably, it also includes a fixing seat, the fixing seat having a through hole in the middle, and a fixing cylinder fixedly connected to one side of the fixing seat, the fixing cylinder being sleeved on the outside of the piston rod and fixedly connected to the cylinder body.

[0016] Preferably, the floating rod is fixedly connected to the brake pad via a disc base, and both the disc base and the limiting ring are slidably connected to the fixed cylinder.

[0017] Preferably, the fixed cylinder has a stepped groove inside, which is used to limit the movement of the limiting ring along its axial direction.

[0018] (III) Beneficial Effects

[0019] Compared with the prior art, the present invention provides a hydraulic disc brake, which has the following advantages:

[0020] 1. This hydraulic disc brake, through the combination of a hydraulic cylinder and a disc spring, drives the brake pads to move and perform braking action. At the same time, under the action of the floating rod, it can compensate for the wear of the brake pads to ensure its braking effect.

[0021] 2. This hydraulic disc brake, by sliding the disc seat and the limiting ring inside the fixed cylinder, limits their movement through the fixed cylinder, preventing the piston rod and floating rod from tilting during braking and improving their service life. Attached Figure Description

[0022] Figure 1 This is a cross-sectional schematic diagram of the structure of this utility model;

[0023] Figure 2 This is a side view of the structure of this utility model.

[0024] In the diagram: 1. Brake pad; 2. Disc seat; 3. Fixed cylinder; 4. Limiting ring; 5. Limiting ring; 6. Limiting ring; 7. Piston rod; 8. Disc spring; 9. First oil port; 10. Cylinder body; 11. Sealing seat; 12. Floating rod; 13. Second oil port; 14. Through hole; 15. Fixed seat. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0026] Please see Figure 1-2 As shown, a hydraulic disc brake includes a piston rod 7, a cylinder 10, and a floating rod 12. The cylinder 10 has a first oil port 9 and a second oil port 13 at both ends for connecting hydraulic oil. The piston rod 7 is axially movably inserted into the cylinder 10. A limit ring 6 is fixedly connected to the end of the piston rod 7, and a disc spring 8 abuts against the limit ring 6 and the cylinder 10. The floating rod 12 is axially inserted through the piston rod 7, and a sealing fit is formed between the floating rod 12 and the inner wall of the through hole of the piston rod 7. The floating rod 12 can slide relative to the piston rod 7 along its axial direction. A brake pad 1 is fixedly connected to the end of the floating rod 12 away from the cylinder 10.

[0027] During braking, no pressure oil is supplied to the first oil port 9. The pre-compressed disc spring 8 releases its elasticity and pushes the piston rod 7 axially through the limiting ring 6. The piston rod 7 drives the brake pad 1 to move synchronously through the floating rod 12, bringing the brake pad 1 closer to the brake disc. When the brake is released, pressure oil is supplied to the first oil port 9. The piston rod 7 drives the disc spring 8 to compress through the limiting ring 6, and at the same time, the floating rod 12 drives the brake pad 1 to reset, moving the brake pad 1 away from the brake disc. When the brake pad 1's braking performance decreases due to wear and wear compensation is required, pressure oil is supplied to the second oil port 13 during braking. Under the action of oil pressure, the floating rod 12 slides relative to the piston rod 7, thereby driving the brake pad 1 to move closer to the brake disc to ensure braking effect. When the piston rod 7 resets, no pressure oil is supplied to the second oil port 13.

[0028] To prevent the brake pad 1 from remaining in contact with the brake disc after the hydraulic cylinder retracts during wear compensation, a limit ring 5 is fixedly connected to the outer side of the end of the floating rod 12 away from the cylinder body 10. A limit retaining ring 4 is fixedly connected to the limit ring 6. The limit retaining ring 4 cooperates with the piston rod 7 to limit the limit ring 5. Specifically, the axial floating distance of the floating rod 12 relative to the piston rod 7 is less than the axial stroke of the piston rod 7 relative to the cylinder body 10. By setting the limit retaining ring 4 and the limit ring 5, when the piston rod 7 extends, the piston rod 7 acts on the floating rod 12 through the limit ring 5 to make the floating rod 12 extend synchronously. When the piston rod 7 retracts, the limit retaining ring 4 acts on the limit ring 5 to make the floating rod 12 return to its original position.

[0029] In some embodiments, a sealing seat 11 is fixedly connected to one end of the piston rod 7 located inside the cylinder 10, and the piston rod 7 is sealed to the floating rod 12 through the sealing seat 11. Sealing rings are provided between the sealing seat 11 and both the piston rod 7 and the floating rod 12.

[0030] In some embodiments, a fixing seat 15 is further included. A through hole 14 is provided in the middle of the fixing seat 15. A fixing cylinder 3 is fixedly connected to one side of the fixing seat 15. The fixing cylinder 3 is sleeved on the outside of the piston rod 7 and fixedly connected to the cylinder body 10. During installation, bolts are passed through the through hole 14 through the fixing seat 15 to install and fix it.

[0031] Specifically, the floating rod 12 is fixedly connected to the brake pad 1 via the disc seat 2, and both the disc seat 2 and the limiting ring 6 are slidably connected to the fixed cylinder 3. The fixed cylinder 3 provides auxiliary support for the piston rod 7, preventing the piston rod 7 from tilting under force during braking. At the same time, it can protect the disc spring 8, preventing foreign objects from entering the gap of the disc spring 8 and affecting its expansion and contraction.

[0032] Specifically, the fixed cylinder 3 has a stepped groove inside, which limits the movement of the limiting ring 6 along its axial direction to prevent the piston rod 7 from directly acting on the bottom end of the cylinder 10 when it retracts.

[0033] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A hydraulic disc brake comprising X, characterized in that, include: The cylinder body (10) has a first oil port (9) and a second oil port (13) for connecting hydraulic oil at both ends. Piston rod (7), which is axially movably inserted into cylinder (10), with a limiting ring (6) fixedly connected to the end of piston rod (7), and a disc spring (8) abutting between the limiting ring (6) and cylinder (10). A floating rod (12) is provided to pass through the piston rod (7) along the axial direction. The floating rod (12) and the inner wall of the through hole of the piston rod (7) form a sealing fit. The floating rod (12) can slide relative to the piston rod (7) along its axial direction. A brake pad (1) is fixedly connected to one end of the floating rod (12) away from the cylinder (10).

2. A hydraulic disc brake according to claim 1, characterised in that: A limiting ring (5) is fixedly connected to the outer side of the end of the floating rod (12) away from the cylinder (10), and a limiting retaining ring (4) is fixedly connected to the limiting ring (6). The limiting retaining ring (4) cooperates with the piston rod (7) to limit the limiting ring (5).

3. A hydraulic disc brake according to claim 1, characterized in that: The axial floating distance of the floating rod (12) relative to the piston rod (7) is less than the axial stroke of the piston rod (7) relative to the cylinder (10).

4. A hydraulic disc brake according to claim 1, characterized in that: The piston rod (7) is fixedly connected to a sealing seat (11) at one end inside the cylinder (10), and the piston rod (7) is sealed to the floating rod (12) through the sealing seat (11).

5. A hydraulic disc brake according to claim 1, characterized in that: It also includes a fixed seat (15), which has a through hole (14) in the middle. A fixed cylinder (3) is fixedly connected to one side of the fixed seat (15). The fixed cylinder (3) is sleeved on the outside of the piston rod (7) and fixedly connected to the cylinder body (10).

6. A hydraulic disc brake according to claim 5, wherein: The floating rod (12) is fixedly connected to the brake pad (1) through the disc seat (2), and the disc seat (2) and the limiting ring (6) are slidably connected to the fixed cylinder (3).

7. A hydraulic disc brake according to claim 5, wherein: The fixed cylinder (3) has a stepped groove inside, which is used to limit the movement of the limiting ring (6) along its axial direction.

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