Fixed hydraulic disc brake caliper

Abstract

The invention discloses a fixed hydraulic disc brake caliper which comprises a caliper body assembly and a friction plate assembly arranged in the caliper body assembly, the friction plate assembly comprises a pair of friction plate bodies which are oppositely arranged, the caliper body assembly comprises an inner caliper body and an outer caliper body which are matched with each other, the inner caliper body is provided with a mounting hole used for mounting and fixing the whole brake caliper, and the outer caliper body is provided with a mounting hole used for mounting and fixing the whole brake caliper. The inner caliper body and the outer caliper body are both provided with driving cylinders for driving the friction plate bodies on the corresponding sides to move, and the inner caliper body and the outer caliper body are both provided with return elastic structures for returning the friction plate bodies on the corresponding sides. The fixed hydraulic disc type brake caliper is reasonable in structural design, can realize strong torque and high braking force, improves driving safety, cancels a mounting bracket, is provided with a mounting hole and is fixed on the mounting plate, four cylinders on the two sides are hydraulically and simultaneously clamp the brake disc, stable braking is realized, and the fixed hydraulic disc type brake caliper can be suitable for heavy-load mechanical equipment.

Description

Technical Field

[0001] The invention relates to the technical field of vehicle braking, and in particular to a fixed hydraulic disc brake caliper. Background Art

[0002] The hydraulic disc brake calipers currently used in agricultural machinery and equipment or other vehicles all use single-sided hydraulic cylinder braking, and the fixed bracket and the brake caliper body are separate. The gap between the friction plate and the brake disc is eliminated by sliding with the bracket on both sides fixed on the brake caliper to achieve braking.

[0003] This structure is suitable for micro or small vehicles and agricultural machinery with small range of motion and small braking torque. With the rapid development of agricultural mechanization, the current market has higher and higher requirements for the load and braking performance of agricultural machinery. The thickness of the brake disc has doubled, and the gap between the two friction plates has increased accordingly. The traditional caliper body and bracket sliding brake caliper will become stuck or not return to position due to the increase in sliding range.

[0004] For example, patent CN107917158A discloses a hydraulic double-cylinder brake caliper assembly, which includes a caliper body with two hydraulic chambers, the two hydraulic chambers are connected at the bottom, and pistons are respectively arranged inside; it also includes a fixed frame, on which an inner friction plate and an outer friction plate are connected through a yoke spring, and the friction surfaces of the two friction plates are opposite and both cooperate with the brake disc clearance; pin holes are provided on both sides of the fixed frame, and pin shafts that slide with the pin holes are connected to the lifting ears on the outside of the caliper body through bolts; the bracket has a sliding structure, and heavy-loaded and large-size products are prone to sticking or non-returning, and cannot be used for large agricultural machinery and vehicle equipment. Summary of the invention

[0005] In view of the shortcomings of the prior art, the present invention provides a fixed hydraulic disc brake caliper, which can achieve strong torque, high braking force, stable braking and less prone to jamming.

[0006] In order to solve the above technical problems, the technical solution adopted by the present invention is:

[0007] The fixed hydraulic disc brake caliper includes a caliper body assembly and a friction plate assembly arranged in the caliper body assembly, the friction plate assembly includes a pair of friction plate bodies arranged opposite to each other, the caliper body assembly includes a matching inner caliper body and an outer caliper body, the inner caliper body is provided with a mounting hole for fixing the entire brake caliper, the inner caliper body and the outer caliper body are both provided with a driving cylinder for driving the corresponding side friction plate body to move, and the inner caliper body and the outer caliper body are both provided with a return elastic structure for returning the corresponding side friction plate body.

[0008] Further:

[0009] An extension portion is arranged at the lower part of the inner caliper body, and a mounting hole is arranged on the extension portion.

[0010] A hollow structure is provided on the top of the inner caliper body and the outer caliper body, and a dust cover is provided on the top of the inner caliper body and the outer caliper body corresponding to the hollow structure.

[0011] The return elastic structure comprises a movable bolt structure arranged on the corresponding side caliper body, the inner end of the bolt structure is connected to the friction plate body on the corresponding side, and a return spring is arranged on the bolt structure outside the corresponding caliper body.

[0012] A connecting rod is arranged between the tops of the inner caliper body and the outer caliper body, and a guide hole movably matched with the connecting rod is arranged on the friction plate assembly.

[0013] The inner caliper body or the outer caliper body is provided with an oil inlet, the driving cylinder on the inner caliper body and the driving cylinder on the outer caliper body are connected through a matching through hole between the inner caliper body and the outer caliper body, and the oil inlet is connected to the through hole.

[0014] An adjustable adjusting nut is arranged at the outer end of the bolt structure, and a return spring is located between the outer side of the caliper body and the adjusting nut.

[0015] The driving cylinders on the clamp body on each side are two hydraulic cylinders connected side by side.

[0016] The hydraulic cylinder comprises a cylinder body and a piston. A rectangular groove is arranged in the cylinder body, and a rectangular sealing ring acting on the outer edge of the piston is arranged in the rectangular groove.

[0017] The bottoms of the two cylinder bodies in the caliper body on each side are connected by two inclined holes to achieve serial connection.

[0018] Compared with the prior art, the present invention has the following advantages:

[0019] The fixed hydraulic disc brake caliper has a reasonable structural design, can achieve strong torque, high braking force, improve driving safety, eliminate the mounting bracket, the caliper body has its own mounting holes fixed on the mounting plate, and the four-cylinder hydraulic pressure on both sides clamps the brake disc at the same time to achieve smooth braking, which can be applied to heavy-load mechanical equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The following is a brief description of the contents and symbols in the drawings of this specification:

[0021] Figure 1 It is a front view schematic diagram of the brake caliper of the present invention.

[0022] Figure 2 It is a bottom view schematic diagram of the brake caliper of the present invention.

[0023] Figure 3 It is a side schematic diagram of the brake caliper of the present invention.

[0024] Figure 4 For along Figure 3 AA section diagram.

[0025] Figure 5 For along Figure 3 Schematic diagram of the BB cross-section.

[0026] Figure 6 and Figure 7 It is a schematic diagram of the three-dimensional structure of the brake caliper of the present invention.

[0027] In the figure:

[0028] 1. Inner caliper body, 2. Outer caliper body, 3. Through hole sealing ring, 4. Split pin, 5. Rectangular sealing ring, 6. Steel ball, 7. Hexagon socket bolt, 8. Semicircular head hexagon socket bolt, 9. Hexagon nut, 10. Bleed screw, 11. Bleed screw cap, 12. Spring seat, 13. Flat washer, 14. Positioning block, 15. Dust cover, 16. Piston, 17. Connecting rod, 18. Friction plate assembly, 19. Dust cover, 20. Hexagon socket bolt, 21. Cross slot bolt, 22. Return spring, 23. Threaded plug. DETAILED DESCRIPTION

[0029] The specific implementation modes of the present invention will be further explained in detail below through the description of embodiments with reference to the accompanying drawings.

[0030] like Figures 1 to 7 As shown, the fixed hydraulic disc brake caliper includes a caliper body assembly and a friction plate assembly 18 arranged in the caliper body assembly, the friction plate assembly includes a pair of friction plate bodies arranged opposite to each other; the caliper body assembly includes a matching inner caliper body 1 and an outer caliper body 2, the inner caliper body is provided with a mounting hole for mounting and fixing the entire brake caliper, the mounting bracket is eliminated, and the caliper body is fixed on the mounting plate with its own mounting hole; that is, the traditional mounting bracket is omitted, the mounting hole is designed on the inner caliper body, the entire brake caliper is firmly mounted on the mounting plate, the installation function is convenient, the shaking of the caliper body is reduced, and the jamming or non-returning phenomenon caused by the sliding cooperation between the caliper body and the bracket is eliminated.

[0031] A pair of friction plate bodies include a friction plate on one side arranged on the inner side of the inner caliper body and a friction plate on the other side arranged on the inner side of the outer caliper body; both the inner caliper body and the outer caliper body are provided with a driving cylinder for driving the corresponding side friction plate body to move, and the inner and outer hydraulics relatively clamp the brake disc to achieve super torque and shear force, and the braking is smoother.

[0032] Both the inner caliper body and the outer caliper body are provided with a return elastic structure for returning the friction plate body on the corresponding side; preferably, the return elastic structure includes a movable bolt structure arranged on the caliper body on the corresponding side, the inner end of the bolt structure is connected to the friction plate body on the corresponding side, and a return spring 22 is arranged on the bolt structure on the outer side of the corresponding caliper body; under the action of the inner and outer caliper return springs, the friction plate is pulled to the piston end face and returns to the initial state, avoiding abnormal non-return situation, and the operation is stable and reliable.

[0033] The inner caliper body and the outer caliper body are fastened together by a long bolt, which is a hexagon socket bolt 7; an extension portion is provided at the lower part of the inner caliper body, and a mounting hole is provided on the extension portion; the inner and outer calipers are processed separately and combined into one body, which is convenient for processing; they are directly fixed and installed to reduce the shaking of the caliper body.

[0034] A hollow structure is provided on the top of the inner caliper body and the outer caliper body, and a dust cover 19 is provided above the corresponding hollow structure on the top of the inner caliper body and the outer caliper body. The dust cover is an iron cover and is fixed by a cross-slot bolt 21. There is a certain gap between the edge of the dust cover and the top of the caliper body, which has a good dustproof effect and does not affect heat dissipation.

[0035] A connecting rod 17 is provided between the tops of the inner caliper body and the outer caliper body, a guide hole movably matched with the connecting rod is provided on the friction plate assembly, and the end of the connecting rod is positioned by a cotter pin 4.

[0036] An oil inlet and a bleed screw 10 are provided on the inner caliper body or the outer caliper body. The driving cylinder on the inner caliper body and the driving cylinder on the outer caliper body are connected through a through hole matched between the inner caliper body and the outer caliper body. The oil inlet is connected to the through hole, and a steel ball 6 and a through hole sealing ring 3 are provided corresponding to the through hole; the driving cylinder on each side of the caliper body is two hydraulic cylinders connected side by side; the bottoms of the two cylinder bodies in each side of the caliper body are connected through two inclined holes to achieve a series setting. A threaded plug 23 is provided at the corresponding oil inlet to prevent water vapor from entering before installation. The four cylinders of the inner and outer brake calipers are supplied with fluid at the same time through one oil inlet, and the braking is stable and reliable. Preferably, the oil inlet, the bleed screw 10 and the bleed screw cap 11 are all arranged on the inner caliper body, and the structure is compact.

[0037] An adjustable adjusting nut is provided at the outer end of the bolt structure, and the return spring is located between the outer side of the caliper body and the adjusting nut. The return force can be adjusted by adjusting the nut; the bolt structure is an external hexagonal bolt 20 or a semi-circular head internal hexagonal bolt 8, the inner end is connected to the friction plate through a positioning block 14, the adjusting nut is a hexagonal nut 9, and a spring seat 12 and a flat washer 13 are provided corresponding to the end of the return spring.

[0038] The hydraulic cylinder includes a cylinder body and a piston. A rectangular groove is provided in the cylinder body. A rectangular sealing ring 5 is provided in the rectangular groove and acts on the outer edge of the piston. The rectangular piston is pushed by the oil pressure, and the piston pushes the friction plate forward to realize the braking function. After the pressure is released, the piston retreats a small gap by virtue of the self-reset function of the rectangular sealing ring, realizing the function of controlling the gap between the friction plate and the brake disc.

[0039] The fixed hydraulic disc brake caliper of the present invention has a reasonable structural design, can achieve strong torque, high braking force, improve driving safety, eliminate the mounting bracket, the caliper body has its own mounting hole fixed on the mounting plate, and the double-sided four-cylinder hydraulic system simultaneously clamps the brake disc to achieve smooth braking, and can be suitable for heavy-load mechanical equipment.

[0040] Preferred embodiments of the present invention are:

[0041] 1) In order to facilitate processing, the brake caliper is designed to be composed of two caliper bodies, inner and outer;

[0042] 2) An iron dust cover is provided above the brake caliper assembly, and two bolt fixing holes are provided on the dust cover. A threaded hole is provided on the inner and outer caliper bodies respectively, and the iron dust cover is connected to the inner and outer caliper bodies through two semi-circular head bolts;

[0043] 3) The brake caliper assembly includes an inner caliper body and an outer caliper body. The inner caliper body is provided with two mounting holes, a bleed screw hole, an oil inlet hole, and two piston cylinders. The bleed screw hole is located on one side of the mounting hole on the inner caliper body and is parallel to the mounting hole. An oblique hole is provided at the bottom of the piston cylinder on one side of the bleed screw hole of the caliper body, which is at an angle of 40° to the cylinder hole and is connected with the bleed screw hole. The liquid inlet hole is located on the other side of the inner caliper body and is connected with the bottom of the other piston cylinder on the inner caliper body.

[0044] 4) The inner bottom of the two piston cylinders on the inner caliper body are provided with oblique holes with an angle of 40° with the cylinder hole, so that the two piston cylinders are connected;

[0045] 5) Rectangular grooves are arranged in the two piston cylinders on the inner caliper body. The rectangular grooves match the rectangular sealing rings and the rectangular pistons. The rectangular pistons are pushed by the oil pressure, and the pistons push the friction plates forward to realize the braking function. After the pressure is released, the rectangular sealing rings can reset themselves to make the pistons move back to a smaller gap, thus realizing the function of controlling the gap between the friction plates and the brake discs.

[0046] 6) The ends of the two piston cylinders of the inner caliper body are equipped with dust cover installation grooves. One end of the corrugated dust cover cooperates with the dust cover installation groove of the inner caliper body, and the other end cooperates with the rectangular ring piston installation groove, which can realize dust prevention when the piston moves back and forth freely;

[0047] 7) Through holes connected to the outer caliper body are provided on both sides of the mounting surface of the inner caliper body, and friction plate positioning holes are provided on the end surface of the piston cylinder of the inner caliper body. After the inner and outer calipers are assembled, the inner and outer friction plates are positioned by a connecting rod. A cotter pin hole and a cotter pin are provided at one end of the connecting rod. After assembly, the friction plate can move along the axial direction of the piston cylinder;

[0048] 8) A return spring bolt hole is provided on the end face of the inner caliper piston cylinder. The friction plate is connected to the inner caliper body through a hexagonal bolt. A return spring is provided at the other end of the bolt. A spring seat and an M6 hexagonal nut are provided at one end of the return spring to prevent loosening.

[0049] 9) A through hole is provided between the through holes on both sides of the inner caliper mounting surface, which is at a 40° angle to the piston cylinder and communicates with the 40° inclined hole at the bottom of the piston cylinder and the liquid inlet and air release holes;

[0050] 10) A hole is provided on the mounting surface of the inner caliper body, near the bleed screw, at the end of the through hole at a 40° angle to the piston cylinder. A steel ball is provided in the hole. A deep countersunk hole is provided above the hole. A sealing ring is provided in the deep countersunk hole (the mounting surface is sealed when the inner and outer calipers are combined);

[0051] 11) The inner bottom of the two piston cylinders on the outer caliper body are provided with oblique holes at an angle of 40° to the cylinder hole, so that the two piston cylinders are connected. The outer bottom of the two piston cylinders on the outer caliper body are provided with oblique holes at an angle of 40° to the cylinder hole, so that the two piston cylinders are connected with the through holes between the M12 threaded holes on both sides of the outer caliper body mounting surface;

[0052] 12) Rectangular grooves are arranged in the two piston cylinders on the outer caliper body. The rectangular grooves match the rectangular sealing rings and the rectangular pistons. The rectangular pistons are pushed by the oil pressure, and the pistons push the friction plates forward to realize the braking function. After the pressure is released, the rectangular sealing rings can reset themselves to make the pistons move back to a smaller gap, thus realizing the function of controlling the gap between the friction plates and the brake discs.

[0053] 13) Both piston cylinder ends of the outer caliper body are provided with dust cover mounting grooves. One end of the corrugated dust cover 15 cooperates with the dust cover mounting groove of the inner caliper body, and the other end cooperates with the rectangular ring piston mounting groove, which can realize dust prevention when the piston 16 moves back and forth freely;

[0054] 14) Threaded holes connected to the inner caliper body are provided on both sides of the outer caliper body mounting surface. Since there is no mounting hole on the end surface of the outer caliper body piston cylinder, an insert is provided on the casting. One end of the insert is fixed to the outer caliper body mounting surface with a countersunk hexagon socket bolt, and the other end is provided with a friction plate positioning hole. After the inner and outer calipers are assembled, the inner and outer friction plates are positioned by a connecting rod. One end of the connecting rod is provided with a cotter pin hole and a cotter pin. After assembly, the friction plate can move along the axial direction of the piston cylinder;

[0055] 15) A return spring bolt hole is provided on the end face of the piston cylinder of the outer caliper body. The friction plate is connected to the inner caliper body through a hexagonal bolt. A return spring is provided at the other end of the bolt. A spring seat and an M6 hexagonal nut are provided at one end of the return spring to prevent loosening.

[0056] 16) A through hole with a 40° angle to the piston cylinder is provided between the M12 threaded holes on both sides of the outer clamp body mounting surface, and is connected to the 40° inclined hole on the outer side of the bottom of the piston cylinder;

[0057] 17) A hole is provided on the end of the through hole at a 40° angle with the piston cylinder near the liquid inlet hole on the mounting surface of the outer caliper body, a steel ball is provided in the hole, a deep countersunk hole is provided above the hole, and a sealing ring is provided in the deep countersunk hole (the mounting surface is sealed when the inner and outer calipers are combined);

[0058] The advantages of this patent application are: the fixed hydraulic brake caliper adopts the method of separate processing of the inner and outer calipers and combines them into one body, which is convenient for processing. The four inner and outer cylinders of the fixed hydraulic brake caliper are interconnected through a through hole, and share a vent port and a liquid inlet, which reduces the layout of the oil pipes; the mounting hole is designed on the inner caliper body, and the entire brake caliper is firmly installed with the mounting plate, which is convenient for installation, reduces the shaking of the caliper body, and eliminates the phenomenon of jamming or non-returning caused by the sliding cooperation between the caliper body and the bracket. The inner and outer hydraulic clamping brake discs can achieve super torque and shear force, and the braking is smoother; the inner and outer caliper four-cylinder hydraulic clamping brake discs can achieve super torque and shear force, and the braking is smoother; solve the problem of brake lag, and improve the service life and driving safety. The fixed hydraulic brake caliper is divided into left and right caliper assemblies, the inner and outer caliper blank castings are universal, the left and right parts are distinguished during processing, and the assembly parts are universal.

[0059] Braking principle description:

[0060] 1. Press the brake pedal, and the brake fluid enters the brake caliper fluid inlet from the master cylinder outlet through the connecting oil pipe, and then enters the inner cavity of the inner and outer brake calipers from the fluid inlet. The four cylinders in the inner cavity are interconnected through the through hole, so that one fluid inlet can supply fluid to the four cylinders of the inner and outer brake calipers at the same time;

[0061] 2. After the brake fluid enters the inner cavity, it generates pressure under the sealing action of the rectangular sealing ring, pushing the piston forward;

[0062] 3. The brake caliper is fixed on the mounting plate through two mounting holes on the inner brake caliper body. The piston moves forward to push the friction plate forward, so that the friction plate fits the brake disc. No matter which cylinder contacts the brake disc first, because the four cylinders are interconnected, the liquid will quickly fill into the remaining cylinders under the reaction force, so that the inner and outer friction plates can fit both sides of the brake disc at the same time;

[0063] 4. When the brake fluid in the brake caliper cavity is filled (the two friction plates are in contact with the brake disc), the pressure in the cavity rises, and the two friction plates hold the brake disc tightly to achieve the braking effect;

[0064] 5. Release the brake pedal, the pressure is released instantly, and the piston returns to its original position under the automatic reset function of the rectangular circle, and the excess brake fluid in the inner cavity of the caliper is returned to the brake oil tank through the oil pipe. Under the action of the inner and outer caliper return springs, the friction plate is pulled to the end face of the piston and returns to the initial state.

[0065] The above is only an explanation of the preferred embodiments of the present invention, and the above technical features can be arbitrarily combined to form multiple embodiments of the present invention.

[0066] The present invention is described above by way of example in conjunction with the accompanying drawings. It is obvious that the specific implementation of the present invention is not limited to the above-mentioned method. As long as various non-substantial improvements are made using the concept and technical solution of the present invention, or the concept and technical solution of the present invention are directly applied to other occasions without improvement, they are all within the protection scope of the present invention.

Claims

1. A fixed hydraulic disc brake caliper, comprising a caliper body assembly and a friction plate assembly arranged in the caliper body assembly, wherein the friction plate assembly comprises a pair of friction plate bodies arranged opposite to each other, characterized in that: The caliper body assembly includes a matching inner caliper body and an outer caliper body. The inner caliper body is provided with a mounting hole for installing and fixing the entire brake caliper. The inner caliper body and the outer caliper body are both provided with a driving cylinder for driving the corresponding side friction plate body to move. The inner caliper body and the outer caliper body are both provided with a return elastic structure for returning the corresponding side friction plate body.

2. The fixed hydraulic disc brake caliper according to claim 1, characterized in that: An extension portion is arranged at the lower part of the inner caliper body, and a mounting hole is arranged on the extension portion.

3. The fixed hydraulic disc brake caliper according to claim 1, characterized in that: A hollow structure is provided on the top of the inner caliper body and the outer caliper body, and a dust cover is provided on the top of the inner caliper body and the outer caliper body corresponding to the hollow structure.

4. The fixed hydraulic disc brake caliper according to claim 1, characterized in that: The return elastic structure comprises a movable bolt structure arranged on the corresponding side caliper body, the inner end of the bolt structure is connected to the friction plate body on the corresponding side, and a return spring is arranged on the bolt structure outside the corresponding caliper body.

5. The fixed hydraulic disc brake caliper according to claim 1, characterized in that: A connecting rod is arranged between the tops of the inner caliper body and the outer caliper body, and a guide hole movably matched with the connecting rod is arranged on the friction plate assembly.

6. The fixed hydraulic disc brake caliper according to claim 1, characterized in that: The inner caliper body or the outer caliper body is provided with an oil inlet, the driving cylinder on the inner caliper body and the driving cylinder on the outer caliper body are connected through a matching through hole between the inner caliper body and the outer caliper body, and the oil inlet is connected to the through hole.

7. The fixed hydraulic disc brake caliper according to claim 4, characterized in that: An adjustable adjusting nut is arranged at the outer end of the bolt structure, and a return spring is located between the outer side of the caliper body and the adjusting nut.

8. The fixed hydraulic disc brake caliper according to claim 6, characterized in that: The driving cylinders on the clamp body on each side are two hydraulic cylinders connected side by side.

9. The fixed hydraulic disc brake caliper according to claim 8, characterized in that: The hydraulic cylinder comprises a cylinder body and a piston. A rectangular groove is arranged in the cylinder body, and a rectangular sealing ring acting on the outer edge of the piston is arranged in the rectangular groove.

10. The fixed hydraulic disc brake caliper according to claim 9, characterized in that: The bottoms of the two cylinder bodies in the caliper body on each side are connected by two inclined holes to achieve serial connection.

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