CN115838138A - A hydraulic disc brake double-acting brake caliper - Google Patents

Abstract

The invention discloses a hydraulic disc type brake double-acting brake caliper, which comprises a brake disc, wherein a left brake shoe and a right brake shoe are symmetrically arranged on two sides of the brake disc, one sides of the left brake shoe and the right brake shoe, which are far away from the brake disc, are respectively and movably connected with a left connecting rod and a right connecting rod, the left connecting rod and the right connecting rod are respectively and movably connected to a hydraulic disc type brake caliper frame, one ends of the left connecting rod and the right connecting rod, which are far away from the left brake shoe and the right brake shoe, are respectively connected to an air cylinder driving mechanism through pin shafts, and the air cylinder driving mechanism is positioned between the left connecting rod and the right connecting rod; the double-acting brake caliper integrates the two into one, reduces the number of the brake calipers, requires smaller installation space, improves the appearance quality of the winch and effectively reduces the production cost.

Description

A hydraulic disc brake double-acting brake caliper

technical field

The invention belongs to the technical field of petroleum drilling equipment, and relates to a hydraulic disc brake double-acting brake caliper.

Background technique

The existing oil drilling winch hydraulic disc brake is usually composed of working tongs and safety tongs, the working tongs are used for working braking, and the safety tongs are used for parking braking. The two kinds of tongs have different functions, so they are indispensable when configuring. , The result is that the installation space occupied by the brake caliper is large, the layout is difficult, and the appearance quality of the winch is poor.

The double-action brake caliper can realize working brake and parking brake by using one brake caliper, and its performance is the same as that of the currently used brake caliper, and the control of the brake system does not need to be changed in any way. The advantages of using double-acting brake calipers are: the number is half of the original brake calipers, the manufacturing cost is greatly reduced, the installation space of the brake calipers is saved, the structure of the winch is more compact, the layout of the whole winch is more reasonable, and the appearance quality of the winch is better.

Contents of the invention

The purpose of the present invention is to provide a hydraulic disc brake double-acting brake caliper, which realizes that a brake caliper has the functions of working brake and parking brake at the same time, so as to solve the shortcomings and deficiencies of the existing brake caliper proposed in the above-mentioned background technology.

The technical scheme adopted in the present invention is a double-acting brake caliper of a hydraulic disc brake, including a brake disc, a left brake shoe and a right brake shoe are arranged symmetrically on both sides of the brake disc, and the left brake shoe and the right brake shoe are far away from the brake disc. One side is respectively movably connected with a left link and a right link. The left link and the right link are respectively movably connected to the hydraulic disc brake caliper frame. The ends of the left link and the right link are far away from the left brake shoe and the right brake shoe. They are respectively connected to the cylinder driving mechanism through pin shafts, and the cylinder driving mechanism is located between the left connecting rod and the right connecting rod.

The present invention is also characterized in that:

The sides of the left brake shoe and the right brake shoe away from the brake disc are respectively connected with the left connecting rod and the right connecting rod through pin shafts;

Wherein, the side of the left brake shoe and the right brake shoe away from the brake disc is respectively welded with a left brake shoe and a right brake shoe, and the left brake shoe and the right brake shoe are respectively connected with the left connecting rod and the right connecting rod through pin shafts;

The cylinder driving mechanism includes a secondary oil cylinder, a disc spring is embedded in the secondary oil cylinder, a piston rod is embedded in the disc spring, the piston rod and the secondary oil cylinder are in clearance fit, and the end of the piston rod far away from the secondary oil cylinder passes through the pin shaft and the left connecting rod. The connection also includes a first-stage oil cylinder. The end of the second-stage oil cylinder away from the piston rod is embedded in the inner cavity of the first-stage oil cylinder to cooperate with the clearance of the first-stage oil cylinder. An adjustment nut is connected to the end of the first-stage oil cylinder far away from the second-stage oil cylinder. The level oil cylinder is interference fit, the adjusting nut is connected to the ejector rod, and the ejector rod is connected to the right connecting rod through the pin shaft;

Wherein the shaft of the piston rod is fixedly sleeved with a ring sleeve, and the diameter of the ring sleeve is the same as that of the outer ring of the disc spring;

The side of the cylinder body of the first-stage oil cylinder close to the disc spring is provided with a vent hole, and the vent hole communicates with the inner cavity of the first-stage oil cylinder;

Wherein the adjusting nut is threadedly connected with the ejector rod;

The end of the secondary oil cylinder close to the piston rod is connected with an end cover by bolts, and the piston rod passes through the end cover to fit with the end cover. The first-stage oil cylinder is connected to the end cover A12 by bolts close to the second-stage oil cylinder, and the second-stage oil cylinder passes through the end cover. A12 and end cover A12 clearance fit;

Wherein, the end cover is located on both sides of the piston rod and is respectively provided with an oil hole and a vent hole A, and the oil hole and the vent hole A communicate with the inner cavity of the secondary oil cylinder, and the end of the primary oil cylinder far away from the secondary oil cylinder is provided with an oil hole respectively. Hole A and Vent B.

The beneficial effects of the present invention are:

The original hydraulic disc brake working caliper and safety gear are separated independently, and the number is large. A hydraulic disc brake double-action brake caliper of the present invention combines the two into one, reducing the number of brake calipers and the required installation space. Smaller, the appearance quality of the winch is improved, and the production cost is effectively reduced.

Description of drawings

Fig. 1 is the structural representation of a kind of hydraulic disc brake double-acting brake caliper of the present invention;

Fig. 2 is an exploded schematic diagram of an oil cylinder of a double-acting brake caliper of a hydraulic disc brake of the present invention;

Fig. 3 is a schematic diagram of the installation initial position of a hydraulic disc brake double-acting brake caliper of the present invention;

Fig. 4 is a partially enlarged schematic diagram of the installation initial position of a hydraulic disc brake double-acting brake caliper of the present invention;

Fig. 5 is a schematic diagram of the working braking position of a hydraulic disc brake double-acting brake caliper of the present invention;

Fig. 6 is a schematic diagram of a parking brake position of a double-acting brake caliper of a hydraulic disc brake according to the present invention.

In the figure, 1. brake disc, 2. left brake shoe, 3. right brake shoe, 4. left brake shoe, 5. right brake shoe, 6. left connecting rod, 7. right connecting rod, 8. piston rod, 9 .Ejector rod, 10. End cover, 11. Secondary oil cylinder, 12. End cover, 13. Disc spring, 14. Primary oil cylinder, 15. Adjusting nut, 16. Pin shaft, 17. Pin shaft A, 18. Pin Axis B, 19. Oil hole, 20. Oil hole A, 21. Vent hole, 22. Vent hole A, 23. Vent hole B.

Detailed ways

The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments.

The present invention provides a hydraulic disc brake double-acting brake caliper, as shown in Figure 1 and Figure 2, the left brake shoe 2 and the left brake shoe 4 are connected by welding, and the left brake shoe 4 and the left connecting rod 6 are connected by a pin 16 Connected, the left connecting rod 6 and the piston rod 8 are connected through the end cover B18, the piston rod 8 and the secondary oil cylinder 11 are in clearance fit, the piston rod 8 can slide left and right along the axial direction of the secondary oil cylinder 11, and the disc spring 13 is installed on the piston rod 8 On the right side, the disc spring 13 and the piston rod 8 are installed in the inner cavity of the secondary oil cylinder 11 . The end cover 10 is installed on the left side of the piston rod 8, and the end cover 10 and the piston rod 8 are in clearance fit. The end cover 10 is fixed on the left end of the secondary oil cylinder 11 by bolts, and the secondary oil cylinder 11 is installed in the inner cavity of the primary oil cylinder 14. The secondary oil cylinder 11 and the primary oil cylinder 14 are in clearance fit, the adjusting nut 15 is installed on the right side of the primary oil cylinder 14, the primary oil cylinder 14 is in interference fit with the adjusting nut 15, the adjusting nut 15 is installed on the left side of the ejector rod 9, and the adjusting nut 15 It is threadedly connected with the push rod 9, and the push rod 9 can move left and right along the axial direction. The ejector rod 9 is connected with the right connecting rod 7 through the end cover B18, the right connecting rod 7 is connected with the right brake shoe 5 through the pin shaft 16, and the right brake shoe 3 and the right brake shoe 5 are connected by welding; the cylinder body of the first stage oil cylinder 14 is close to One side of the disc spring 13 is provided with an exhaust hole 21, the exhaust hole 21 communicates with the inner cavity of the primary oil cylinder 14, and the exhaust hole 21 is used to eliminate the air pressure generated when the disc spring 13 is compressed;

The left connecting rod 6 and the right connecting rod 7 are fixed on the hydraulic disc brake caliper frame through the end cover A17, and the left connecting rod 6 and the right connecting rod 7 can respectively rotate around the end cover A17;

As shown in Figure 3 and Figure 4, the specific implementation of the double-acting brake caliper installation process is as follows:

The pressure oil enters the inner cavity of the secondary oil cylinder 11 from the oil hole 19, and the oil pressure generates a thrust to push the piston rod 8 to slide to the right until it reaches a pressure balance with the disc spring 13 and stops. At this time, the oil pressure is P0. The gap S3=0 between the right end of the piston rod 8 and the secondary oil cylinder 11, the gap S2=0 between the right end of the secondary oil cylinder 11 and the primary oil cylinder 14, the gap between the left brake shoe 2 and the right brake shoe 3 is A1, the thickness of the brake disc 1 is A0, and A1>A0. The gap between the left end of the primary oil cylinder 14 and the secondary oil cylinder 11 is S1, and S1>0. At this time, the double-acting brake caliper is at the initial installation position;

As shown in Figure 5, the specific implementation plan of the double-acting brake caliper to realize the working braking process is as follows:

The end of the primary oil cylinder 14 away from the secondary oil cylinder 11 is respectively provided with an oil hole A20 and a vent hole B23, and the vent hole B23 is used to eliminate the air pressure generated when the oil hole A20 enters the pressure oil;

When the pressure oil P1 enters the inner cavity of the primary oil cylinder 14 from the oil hole A20, the secondary oil cylinder 11 slides to the left under the thrust of the pressure oil, the secondary oil cylinder 11 pushes the piston rod 8 to extend to the left, and the piston rod 8 wraps around the end cover A17 The rotation drives the left connecting rod 6 to rotate, the left connecting rod 6 drives the left brake shoe 4 to rotate to the right, and the left brake shoe 4 drives the left brake shoe 2 to rotate to the right and presses the brake disc 1 by the friction force f1 to realize braking;

At the same time, the gap S2 between the right end of the secondary oil cylinder 11 and the primary oil cylinder 14 gradually increases from zero, and the disc spring 13 continues to be compressed until the gap between the left end of the primary oil cylinder 14 and the secondary oil cylinder 11 is S1=0 to stop compression;

The primary oil cylinder 14 slides to the right under the thrust of the pressure oil, the primary oil cylinder 14 pushes the ejector rod 9 to extend to the right, the ejector rod 9 rotates around the end cover A17 to drive the right connecting rod 7 to rotate, and the right connecting rod 7 drives the right brake shoe 5 Rotating to the left, the right brake shoe 5 drives the right brake shoe 3 to rotate to the left and presses the brake disc 1 through the friction force f1 to realize braking;

At this time A1=A0, the double-acting brake caliper is in the working braking position.

The friction force f1 is proportional to the oil pressure P1. When the oil pressure decreases to P1=0, under the action of the disc spring 13, the gap between the right end of the secondary oil cylinder 11 and the primary oil cylinder 14 decreases to S2=0. The secondary oil cylinder 11 and the primary oil cylinder 14 return to the initial position, and the left brake shoe 2 and the right brake shoe 3 are disengaged from the brake disc 1, and now the double-acting brake caliper is in the initial open state.

As shown in Figure 6, the specific implementation plan of the double-acting brake caliper to realize the parking brake process is as follows:

When the double-acting brake caliper is in the initial installation position, when the oil pressure in the left side of the secondary oil cylinder 11 drains and the oil pressure decreases to P0=0, the disc spring 13 gradually extends, and the disc spring 13 pushes the piston rod 8 to the left Sliding, the gap S3 between the right end of the piston rod 8 and the secondary oil cylinder 11 gradually increases from zero. Simultaneously disc spring 13 promotes secondary oil cylinder 11 to slide to the right. The rotation of the piston rod 8 around the end cover A17 drives the left connecting rod 6 to rotate, the left connecting rod 6 drives the left brake shoe 4 to rotate to the right, and the left brake shoe 4 drives the left brake shoe 2 to rotate to the right and presses the brake disc 1 through the friction force f2. Implement the brakes.

At the same time, the secondary oil cylinder 11 pushes the primary oil cylinder 14 to slide to the right, the primary oil cylinder 14 pushes the ejector rod 9 to extend to the right, and the ejector rod 9 rotates around the end cover A17 to drive the right connecting rod 7 to rotate, and the right connecting rod 7 drives The right brake shoe 5 rotates to the left, and the right brake shoe 5 drives the right brake shoe 3 to rotate to the left and presses the brake disc 1 by the friction force f2 to realize braking.

At this time, A1=A0, and the double-acting brake caliper is at the parking brake position.

The end cover 10 is located on both sides of the piston rod 8 and has an oil hole 19 and an exhaust hole A22 respectively. The pressure oil enters the inner cavity of the secondary oil cylinder 11 from the oil hole 19, and the oil hole 19 and the exhaust hole A22 are connected with the secondary oil cylinder 11. The cavity is connected, and the exhaust hole A22 is used to eliminate the air pressure generated when the oil hole 19 enters the pressure oil. When the oil pressure increases to P0, the oil pressure generates a thrust to push the piston rod 8 to slide to the right, and push the end cover 10 to slide to the left. The disc spring 13 is compressed until the gap S3 between the right end of the piston rod 8 and the secondary oil cylinder 11 gradually decreases to zero. The rotation of the piston rod 8 around the end cover A17 drives the left connecting rod 6 to rotate, the left connecting rod 6 drives the left brake shoe 4 to rotate to the left, the left brake shoe 4 drives the left brake shoe 2 to rotate to the left, and the left brake shoe 2 disengages from the brake disc 1 , the brake is released, and the double-acting brake caliper returns to the initial installation position;

The end cover 10 slides to the left and drives the secondary oil cylinder 11 to slide to the left. The negative pressure chamber is formed between the secondary oil cylinder 11 and the primary oil cylinder 14. The primary oil cylinder 14 then slides to the left. The primary oil cylinder 14 is adjusted The nut 15 drives the ejector rod 9 to move to the left, the ejector rod 9 rotates around the end cover A17 to drive the right connecting rod 7 to rotate, the right connecting rod 7 drives the right brake shoe 5 to rotate clockwise to the right, and the right brake shoe 5 drives the right brake shoe 3 directions Rotate to the right to disengage the brake disc 1 to realize loosening of the brake.

The friction force f2 is proportional to the oil pressure P0.

Claims (9)

1. A hydraulic disc brake double-acting brake caliper, comprising a brake disc (1), is characterized in that, the left brake shoe (2) and the right brake shoe (3) are symmetrically arranged on both sides of the brake disc (1), The side of the left brake shoe (2) and the right brake shoe (3) away from the brake disc (1) is respectively movably connected with a left connecting rod (6) and a right connecting rod (7), and the left connecting rod (6) and the right The connecting rods (7) are respectively movably connected to the frame of the hydraulic disc brake caliper, and the ends of the left connecting rod (6) and the right connecting rod (7) away from the left brake shoe (2) and the right brake shoe (3) respectively pass through pin shafts Connected to the cylinder driving mechanism, the cylinder driving mechanism is located between the left connecting rod (6) and the right connecting rod (7). 2. A hydraulic disc brake double-acting brake caliper according to claim 1, characterized in that the sides of the left brake shoe (2) and the right brake shoe (3) away from the brake disc (1) respectively pass through Bearing pin is connected with left connecting rod (6) and right connecting rod (7). 3. A hydraulic disc brake double-acting brake caliper according to claim 1, characterized in that the sides of the left brake shoe (2) and the right brake shoe (3) away from the brake disc (1) are respectively welded Left brake shoe (4) and right brake shoe (5) are arranged, and left brake shoe (4) and right brake shoe (5) are respectively connected with left connecting rod (6) and right connecting rod (7) by bearing pin. 4. A hydraulic disc brake double-acting brake caliper according to claim 1, characterized in that the cylinder drive mechanism includes a secondary oil cylinder (11), and a disc spring (13) is embedded in the secondary oil cylinder (11). ), the disc spring (13) is embedded with a piston rod (8), the piston rod (8) is in clearance fit with the secondary oil cylinder (11), and the end of the piston rod (8) far away from the secondary oil cylinder (11) is connected with the left The connecting rod (6) is connected, and also includes the first-stage oil cylinder (14), and the end of the second-stage oil cylinder (11) away from the piston rod (8) is embedded in the inner cavity of the first-stage oil cylinder (14) to fit with the clearance of the first-stage oil cylinder (14) , one end of the primary oil cylinder (14) away from the secondary oil cylinder (11) is connected with an adjusting nut (15), the adjusting nut (15) has an interference fit with the primary oil cylinder (14), and the adjusting nut (15) is connected to the ejector rod ( 9), the ejector rod (9) is connected with the right connecting rod (7) by a bearing pin. 5. A double-acting brake caliper for a hydraulic disc brake according to claim 4, characterized in that, the piston rod (8) is fixedly sleeved with a ring sleeve, and the diameter of the ring sleeve is the same as that of the disc spring (13 ) with the same outer ring diameter. 6. A hydraulic disc brake double-acting brake caliper according to claim 4, characterized in that an air vent (21 ), the exhaust hole (21) communicates with the first-stage oil cylinder (14) inner cavity. 7. A hydraulic disc brake double-acting brake caliper according to claim 4, characterized in that the adjusting nut (15) is threadedly connected to the push rod (9). 8. A hydraulic disc brake double-acting brake caliper according to claim 4, characterized in that, one end of the secondary oil cylinder (11) close to the piston rod (8) is connected with an end cover (10) by bolts, The piston rod (8) passes through the end cover (10) and fits with the end cover (10) in a clearance, the first-stage oil cylinder (14) is connected to the end cover A (12) by bolts close to the second-stage oil cylinder (11), and the second-stage oil cylinder (11) Through the end cover A (12) and the end cover A (12) clearance fit. 9. A double-acting brake caliper for a hydraulic disc brake according to claim 7, characterized in that the end cover (10) is located on both sides of the piston rod (8) and respectively provided with an oil hole (19) and a drain hole. Air hole A (22), oil hole (19) and exhaust hole A (22) communicate with the inner cavity of the secondary oil cylinder (11), and the ends of the primary oil cylinder (14) away from the secondary oil cylinder (11) are respectively opened There are oil hole A (20) and exhaust hole B (23).

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