Large-cylinder-diameter single-cylinder equal-length pin oil brake disc type brake caliper

Abstract

A large-cylinder-diameter single-cylinder equal-length pin oil brake disc type brake caliper comprises a caliper body and an inner friction plate assembly, a cavity is formed in the center of the caliper body, a brake caliper piston is located in the cavity, the outer end, at the brake caliper piston, of the caliper body is covered with a spring piece, the inner friction plate assembly is arranged on the outer side face of the spring piece, inserting holes are formed in the two sides of the caliper body respectively, and the inner friction plate assembly is arranged in the inserting holes. A main sliding shaft and an auxiliary sliding shaft are fixed to the two ends of the outer friction plate assembly through bolts respectively, the main sliding shaft and the auxiliary sliding shaft are inserted into inserting holes in the two sides of the caliper body respectively, and friction plates of the inner friction plate assembly are opposite to friction plates of the outer friction plate assembly. The outer contour of the caliper body and the outer contour of the caliper support are optimized, the main sliding shaft and the auxiliary sliding shaft slide in the guide pin holes of the caliper support, and sliding is smoother; the sealing mode and structure of the sliding shaft dust cover are changed from inner sealing to outer sealing, and dragging abrasion caused by rusting of the guide pin part is reduced to the maximum extent.

Description

Technical Field

[0001] The utility model relates to a brake caliper, in particular to a single-cylinder oil brake disc brake caliper with a large cylinder diameter and equal-length pins. Background Art

[0002] With the improvement of vehicle safety requirements, in order to meet the dual requirements of customers for the vehicle price and braking performance improvement, most light commercial vehicles on the market currently adopt single-cylinder brake calipers with large cylinder diameters. However, there are few structural varieties of single-cylinder brake calipers with large cylinder diameters on the market. The common brake calipers with large cylinder diameters (φ66.7) generally have a structure of long and short guide pins (that is, the sliding shafts on both sides are of unequal length). After years of market verification and use, due to the unequal length of the two guide pins of this kind of brake caliper, there is a risk of jamming caused by uneven force during sliding; in addition, there are many parts that need to be sealed in this structure of the caliper and the sealing effect is poor, and it is easy to enter substances such as water or sediment during use, resulting in rust and jamming of the sliding shaft part, and problems such as vehicle drag during driving. Content of the Utility Model

[0003] In order to solve the above problems, the purpose of the utility model is to provide a single-cylinder oil brake disc brake caliper with a large cylinder diameter and equal-length pins.

[0004] To achieve the above purpose, the technical solution of the utility model is: a single-cylinder oil brake disc brake caliper with a large cylinder diameter, including a caliper body and an inner friction plate assembly. A cavity is provided in the center of the caliper body. A brake caliper piston is located in the cavity, and a spring plate covers the outer end of the brake caliper piston. An inner friction plate assembly is arranged on the outer side surface of the spring plate. Jack holes are respectively arranged on both sides of the caliper body. The two ends of the outer friction plate assembly are respectively fixed with a main sliding shaft and a secondary sliding shaft through bolts. The main sliding shaft and the secondary sliding shaft are respectively inserted into the jack holes on both sides of the caliper body, and the friction plates of the inner friction plate assembly and the outer friction plate assembly are opposite to each other.

[0005] Further, telescopic cylindrical sliding shaft dust covers are respectively sleeved on the sliding polished rods of the main sliding shaft and the secondary sliding shaft.

[0006] Further, a caliper bracket for fixing the caliper body is arranged at the bottom of the middle part of the caliper body.

[0007] Further, a cable fixing structure for fixing the brake cable is arranged at the outer top of the outer friction plate assembly.

[0008] Further, a square sealing ring is arranged on the inner side wall of the cavity of the caliper body, and the square sealing ring is in close contact with the brake caliper piston.

[0009] Further, the caliper body is integrally cast and formed with stainless steel.

[0010] With the above settings, through the design of the main sliding shaft and the secondary sliding shaft, and with them being of equal length, the risk of jamming caused by uneven force during sliding is reduced, and they are fixed to the caliper body. The number of seals at the main sliding shaft and the secondary sliding shaft parts is reduced from 8 to 4, effectively reducing the risk of jamming during use;

[0011] To meet the layout space of the wheel rim and the brake disc, as well as to meet the requirements of the vehicle's braking force and rigidity strength, the outer contours of the caliper body and the caliper bracket are designed and optimized. The through holes with equal thickness are used at the lugs of the caliper body (i.e., the jack hole parts), and blind holes are used at the guide pin holes of the caliper bracket. The main sliding shaft and the secondary sliding shaft slide in the guide pin holes of the caliper bracket, and the sliding is smoother;

[0012] The sealing method and structure of the sliding shaft dust cover are changed from inner sealing to outer sealing, and two linear sealing lips can be used, improving the sealing performance of the guide pin part and minimizing the dragging wear caused by rust at the guide pin part. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] The present utility model will be further described in conjunction with the accompanying drawings.

[0014] Figure 1 It is the front view structural schematic diagram of the present utility model;

[0015] Figure 2 It is the top view structural schematic diagram of the present utility model;

[0016] Figure 3 It is the side view cross-sectional structural schematic diagram of the present utility model. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0017] As Figures 1-3 shown, a single-cylinder equal-length pin oil brake disc caliper with a large cylinder diameter includes a caliper body 6 and an inner friction plate assembly 9. A cavity is provided in the center of the caliper body 6. The brake caliper piston 5 is located in the cavity, and a spring plate 1 covers the outer end of the brake caliper piston 5. The inner friction plate assembly 9 is arranged on the outer side surface of the spring plate 1. Jack holes are respectively provided on both sides of the caliper body 6. The caliper body 6 is integrally cast with stainless steel. The two ends of the outer friction plate assembly 10 are respectively fixed with a main sliding shaft 3 and a secondary sliding shaft 4 by bolts. The main sliding shaft 3 and the secondary sliding shaft 4 are respectively inserted into the jack holes on both sides of the caliper body 6, and the friction plates of the inner friction plate assembly 9 and the outer friction plate assembly 10 face each other.

[0018] Retractable cylindrical sliding shaft dust covers 2 are respectively sleeved on the sliding polished rods of the main sliding shaft 3 and the secondary sliding shaft 4. A caliper bracket 8 for fixing the caliper body 6 is provided at the bottom of the middle part of the caliper body 6. A cable fixing structure for fixing the cable is provided at the outer top of the outer friction plate assembly 10. A square sealing ring 7 is arranged on the inner side wall of the cavity of the caliper body 6, and the square sealing ring 7 is in close contact with the brake caliper piston 5.

[0019] Working principle of the utility model:

[0020] Firstly, the main sliding shaft and the secondary sliding shaft are designed to have the same length. During sliding, it is not easy to have jamming caused by uneven force, and they are fixed to the caliper body with bolts, so that the number of sealing parts is reduced from 8 to 4, greatly reducing the risk of water and dust ingress;

[0021] Secondly, for this brake caliper, the sliding dust cover of the sliding shaft is used to achieve a sealing effect at the sliding parts between the caliper bracket and the main sliding shaft and the secondary sliding shaft. This seal adopts an external seal structure with two linear seal lips, which can effectively prevent mud, water and dust from entering the guide pin holes, so the sealing effect is better;

[0022] Finally, during braking, under the action of hydraulic pressure, the brake caliper piston pushes the inner friction plate assembly along the spring plate towards the brake disc. Since the brake disc will not produce axial displacement, at the same time, it pulls the outer friction plate assembly, and the reaction force acting on the caliper body pushes the caliper body, the main sliding shaft and the secondary sliding shaft to slide along the guide pin holes of the caliper bracket, so that the caliper body pulls the outer friction plate assembly to press against the brake disc, thereby braking the brake disc to a stop. After the braking is released, the brake caliper piston returns to its original position under the action of the square sealing ring, and the inner friction plate assembly and the outer friction plate assembly are disengaged from the brake disc.

[0023] The above are only the illustrative specific embodiments of the utility model and are not intended to limit the scope of the utility model. Any equivalent changes and modifications made by those skilled in the art without departing from the concept and principle of the utility model shall fall within the scope of protection of the utility model.

Claims

1. A large-bore single-cylinder equal-length pin oil brake disc brake caliper, comprising a caliper body (6) and an inner friction plate assembly (9), characterized in that: A cavity is provided at the center of the caliper body (6), the brake caliper piston (5) is located in the cavity, and the outer end of the caliper body (6) of the brake caliper piston (5) is covered with a spring sheet (1), and an inner friction plate assembly (9) is provided on the outer side surface of the spring sheet (1). Insertion holes are respectively provided on both sides of the caliper body (6), and a main sliding shaft (3) and a secondary sliding shaft (4) are respectively fixed at both ends of the outer friction plate assembly (10) by bolts. The main sliding shaft (3) and the secondary sliding shaft (4) are respectively inserted into the insertion holes on both sides of the caliper body (6), and the friction plates of the inner friction plate assembly (9) are opposite to the friction plates of the outer friction plate assembly (10).

2. A large-bore single-cylinder equal-length pin oil brake disc brake caliper as claimed in claim 1, characterized in that: The sliding polished rods of the main sliding shaft (3) and the auxiliary sliding shaft (4) are respectively covered with telescopic cylindrical sliding shaft dust covers (2).

3. A large-bore single-cylinder equal-length pin oil brake disc brake caliper as claimed in claim 1, characterized in that: A caliper bracket (8) for fixing the caliper body (6) is arranged at the bottom of the middle portion of the caliper body (6).

4. A large-bore single-cylinder equal-length pin oil brake disc brake caliper as claimed in claim 1, characterized in that: A brake wire fixing structure for fixing the brake wire is provided on the outer top of the outer friction plate assembly (10).

5. A large-bore single-cylinder equal-length pin oil brake disc brake caliper as claimed in claim 1, characterized in that: A circle of square sealing ring (7) is arranged on the inner side wall of the cavity of the caliper body (6), and the square sealing ring (7) is in close contact with the brake caliper piston (5).

6. A large-bore single-cylinder equal-length pin oil brake disc brake caliper as claimed in claim 1, characterized in that: The caliper body (6) is formed by integral casting of stainless steel.

Images