CN212004035U - Top drive brake mechanism - Google Patents
Top drive brake mechanism Download PDFInfo
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- CN212004035U CN212004035U CN202020712101.2U CN202020712101U CN212004035U CN 212004035 U CN212004035 U CN 212004035U CN 202020712101 U CN202020712101 U CN 202020712101U CN 212004035 U CN212004035 U CN 212004035U
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- brake pad
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Abstract
The utility model provides a brake mechanism is driven on top belongs to top drive equipment technical field, including casing, brake cylinder assembly, brake block group and friction disc. The hydraulic brake system comprises a brake cylinder assembly, a hydraulic cylinder and a hydraulic control system, wherein the brake cylinder assembly is provided with two sets, each set of brake cylinder assembly comprises a cylinder body, and the cylinder body is provided with a plurality of first cylinder plugs which are driven by hydraulic pressure and extend out relative to the cylinder body. The first brake pad group is used for synchronously rotating along with the main shaft. The two first friction plates are respectively connected with the first cylinder plugs in the two sets of brake cylinder assemblies, and when the main shaft is braked, the first friction plates are driven by the first cylinder plugs and are abutted and rubbed with the first brake pads so as to reduce the speed of the main shaft and brake the main shaft. The utility model provides a brake mechanism is driven on top can reduce the quantity of brake hydro-cylinder assembly to increased the brake moment of torsion, the dismouting of the staff of more being convenient for moreover, the maintenance of being convenient for.
Description
Technical Field
The utility model belongs to the technical field of the top drive equipment, more specifically say, relate to a brake mechanism is driven on top.
Background
The top drive technology (or top drive equipment) is mainly used in the drilling industry and is one of three new technologies of modern drilling equipment. The top drive equipment is used in drilling construction, column drilling, reaming and back reaming can be achieved, labor intensity of workers can be greatly reduced, and drilling time is saved. The top drive brake device is an important component of the top drive equipment and can reduce or stop the speed of a main shaft running in the top drive equipment.
In the prior art, because of the lower brake torque of the top drive brake device and the larger occupied space, a plurality of brake cylinder assemblies are often installed on the top drive brake device to meet the brake torque, but the excessive brake cylinder assemblies can increase the workload during maintenance. In addition, the brake cylinder assembly is a component which is easy to break down, and a friction plate arranged in the brake cylinder assembly is easy to damage and needs to be replaced frequently, but the brake cylinder is difficult to disassemble, wastes time and labor, influences the drilling period and seriously reduces the working efficiency of drilling.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a brake mechanism is driven on top aims at solving the current problem that the brake equipment brake moment of torsion is lower and inconvenient dismantlement is driven on top.
In order to achieve the above object, the utility model adopts the following technical scheme: there is provided a top drive brake mechanism comprising:
the shell is provided with a through hole for the main shaft to penetrate through;
the brake oil cylinder assemblies are arranged in two sets, the two sets of brake oil cylinder assemblies are positioned on two radial sides of the main shaft, each brake oil cylinder assembly comprises a cylinder body fixed on the shell, and the cylinder body is provided with at least one first cylinder plug which is driven by hydraulic pressure and extends out relative to the cylinder body;
the first brake pad is sleeved on the periphery of the main shaft, fixedly connected with the main shaft and synchronously rotated along with the main shaft; and
the two first friction plates are respectively connected with the first cylinder plugs in the two sets of brake oil cylinder assemblies and used for being driven by the first cylinder plugs and being in butt friction with the first brake plates when the main shaft is braked so as to reduce the speed of the main shaft and brake the main shaft.
As another embodiment of the application, the cylinder body is provided with an open accommodating cavity facing the main shaft, and the first cylinder plug is used for moving into the accommodating cavity under the hydraulic driving;
wherein the outer edge of the first brake pad is located in the accommodating cavity.
As another embodiment of this application, the brake cylinder assembly is further provided with at least one second cylinder plug which is driven by hydraulic pressure and extends out of the accommodating cavity relative to the cylinder body, and the top drive brake mechanism further comprises:
the second brake pad is parallel to the first brake pad along the axial direction of the main shaft and is arranged at intervals, and the outer edge part of the second brake pad is positioned in the accommodating cavity and is used for being sleeved on the periphery of the main shaft, fixedly connected with the main shaft and synchronously rotating along with the main shaft; and
the two second friction plates are respectively connected with the second cylinder plugs in the two sets of brake oil cylinder assemblies and are driven by the second cylinder plugs to be abutted against and rub with the second brake plates when the spindle is braked so as to reduce the speed of the spindle and brake the spindle;
the first cylinder plug and the second cylinder plug are respectively arranged on the upper side and the lower side of the accommodating cavity and used for moving relatively or moving back to back.
As another embodiment of the present application, the top drive brake mechanism further includes a rebound assembly for pulling back the first friction plate and the second friction plate to an initial position, the rebound assembly is provided with a plurality of sets, the number of the rebound assembly is equal to the sum of the number of the first cylinder plugs and the number of the second cylinder plugs, one rebound assembly corresponds to one of the first cylinder plugs or one of the second cylinder plugs, and each set of the rebound assembly includes:
the sliding pull rods are arranged on two sides of the corresponding first cylinder plug or the corresponding second cylinder plug in parallel at intervals, are connected with the cylinder body in a sliding mode and are perpendicular to the first friction plate or the second friction plate, one end of each sliding pull rod is connected with the first friction plate or the second friction plate, the other end of each sliding pull rod extends into the cylinder body, a clamping portion used for being clamped with the cylinder body to prevent the sliding pull rods from sliding out of the cylinder body is arranged at the other end of each sliding pull rod, and the sliding pull rods are used for driving the first friction plate or the second friction plate to slide downwards or upwards on the cylinder body to return to an initial position; and
the spring is sleeved on the peripheral surface of the sliding pull rod, one end of the spring is abutted against the cylinder body, the other end of the spring is abutted against the clamping part, and the spring is used for bouncing the sliding pull rod to pull the first friction plate or the second friction plate back to the initial position;
and the cylinder body is provided with a sliding groove for sliding the sliding pull rod.
As another embodiment of the application, the number of the first cylinder plugs in each set of the brake cylinder assembly is at least four, and the number of the second cylinder plugs is at least four;
the first cylinder plug and the second cylinder plug are arranged at intervals along the axial direction of the main shaft in an annular mode.
As another embodiment of this application, the brake mechanism is driven on top still includes and is used for fixing first brake block or the spacing subassembly of second brake block position, spacing subassembly includes:
the spline sleeve is sleeved on the periphery of the main shaft, positioned between the main shaft and the first brake pad and between the main shaft and the second brake pad, and used for limiting the circumferential sliding of the first brake pad and the second brake pad so as to prevent the first brake pad and the second brake pad from slipping with the main shaft;
the expansion sleeve is sleeved on the main shaft, is positioned between the spline sleeve and the main shaft and is used for fixing the spline sleeve;
the first limiting structure is fixed on the spline sleeve and arranged between the first brake pad and the second brake pad, abuts against the bottom surface of the first brake pad and is used for limiting the position of the first brake pad so as to prevent the first brake pad from sliding downwards; and
the second limiting structure is fixed on the spline sleeve, arranged below the second brake pad, abutted against the bottom surface of the second brake pad, and used for limiting the position of the second brake pad so as to prevent the second brake pad from sliding downwards;
the inner rings of the first brake pad and the second brake pad are provided with spline grooves which are matched and connected with the spline sleeve.
As another embodiment of this application, first limit structure is the holding ring, the holding ring cover establish with on the spline housing, be equipped with on the spline housing and be used for holding ring rigidity's annular platform.
As another embodiment of the present application, the second limiting structure is a snap spring, and the snap spring is installed on the spline sleeve;
and the spline sleeve is provided with a clamp spring groove for connecting the clamp spring.
As another embodiment of this application, the brake mechanism is driven on top still including be used for placing in first brake block with middle friction disc between the second brake block, middle friction disc set up in hold in the cavity, and with the cylinder body links to each other, be used for with the bottom surface of first brake block reaches the top surface looks butt of second brake block.
The utility model provides a brake mechanism is driven on top's beneficial effect lies in: compared with the prior art, the utility model discloses brake mechanism is driven on top includes casing, brake cylinder assembly, first brake block and first friction disc, its simple structure, and the practicality is strong. The casing can link to each other with the top drive device, and the main shaft is worn to locate in the casing, can provide a convenient mounted position for brake cylinder assembly. The brake oil cylinder assemblies are arranged in two sets, and the two sets of brake oil cylinder assemblies are arranged at intervals along the axis of the main shaft in an annular mode. The first brake pad is connected with the main shaft and can synchronously rotate along with the main shaft. Each set of brake oil cylinder assembly comprises a cylinder body fixed on the shell, at least one first cylinder plug which is driven by hydraulic pressure and extends out relative to the cylinder body is arranged in the cylinder body, the first cylinder plug is connected with a first friction plate, and the first friction plate and a first brake pad are driven to abut against and rub when the main shaft brakes so as to reduce the rotating speed of the main shaft. The utility model provides a brake mechanism is driven on top has reduced the quantity of brake hydro-cylinder assembly to increased the brake moment of torsion, the dismouting of the staff of more being convenient for moreover, the maintenance of being convenient for.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the embodiments or the prior art descriptions will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.
Fig. 1 is a schematic structural view of a top drive brake mechanism provided in an embodiment of the present invention;
FIG. 2 is a schematic view of the structure at A-A of FIG. 1;
FIG. 3 is a schematic view of a portion of the structure of FIG. 2 at B;
fig. 4 is a schematic structural view of a rebound assembly of the top drive brake mechanism provided by the embodiment of the present invention;
in the figure: 10. a housing; 20. a brake cylinder assembly; 21. a cylinder body; 211. a hydraulic line; 22. a first cylinder plug; 23. a second cylinder plug; 30. a first brake pad; 40. a second brake pad; 50. a first friction plate; 60. A second friction plate; 70. a limiting component; 71. a spline housing; 72. expanding the sleeve; 73. a first limit structure; 74. A second limit structure; 80. a rebound assembly; 81. a sliding pull rod; 82. a spring; 90. an intermediate friction plate; c-up direction.
Detailed Description
In order to make the technical problem, technical solution and advantageous effects to be solved by the present invention more clearly understood, the following description is given in conjunction with the accompanying drawings and embodiments to illustrate the present invention in further detail. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Referring to fig. 1 to 4, a top drive brake mechanism according to the present invention will now be described. The top drive brake mechanism comprises a shell 10, a brake cylinder assembly 20, a first brake pad 30 and a first friction plate 50. Wherein, the housing 10 is provided with a through hole for the main shaft to pass through. The two sets of brake cylinder assemblies 20 are arranged, the two sets of brake cylinder assemblies 20 are both fixedly arranged on the shell 10, the two sets of brake cylinder assemblies 20 are arranged at intervals along the axis of the main shaft in an annular mode, each set of brake cylinder assembly 20 comprises a cylinder body 21 fixed on the shell 10, and the cylinder body 21 is provided with a plurality of first cylinder plugs 22 which are driven by hydraulic pressure and extend out relative to the cylinder body 21. The first brake pad 30 is sleeved on the periphery of the main shaft and fixedly connected with the main shaft, and rotates synchronously with the main shaft. The number of the first friction plates 50 is two, and the two first friction plates 50 are respectively connected with the first cylinder plugs 22 in the two sets of brake cylinder assemblies 20, so that when the spindle is braked, the first friction plates 50 are driven by the first cylinder plugs 22 and are abutted against and rubbed with the first brake pads 30, so that the spindle speed is reduced, and the spindle is braked.
The utility model provides a brake mechanism is driven on top compares with prior art, the utility model discloses brake mechanism is driven on top includes casing 10, brake cylinder assembly 20, first brake block 30 and first friction disc 50, its simple structure, and the practicality is strong. The shell 10 can be connected with a top drive device, and the main shaft penetrates through the shell 10, so that a convenient installation position can be provided for the brake oil cylinder assembly 20. The two sets of brake oil cylinder assemblies 20 are arranged, the two sets of brake oil cylinder assemblies 20 are arranged at intervals along the axis of the main shaft in an annular mode, the structure can reduce the number of the brake oil cylinder assemblies 20, and meanwhile the stability of brake action can be enhanced. The first brake pad 30 is connected to the main shaft and can rotate synchronously with the main shaft. Each set of brake cylinder assembly 20 includes a cylinder body 21 fixed on the housing 10, a plurality of first cylinder plugs 22 are provided in the cylinder body 21 and are driven by hydraulic pressure to extend out relative to the cylinder body 21, the first cylinder plugs 22 are connected with first friction plates 50, and the first friction plates 50 are driven to contact and rub against the first brake plates 30 when the spindle brakes, so as to reduce the spindle speed. The utility model provides a brake mechanism is driven on top has reduced the quantity of brake hydro-cylinder assembly 20 to increased the brake moment of torsion, the dismouting that moreover more can be convenient for the staff is convenient for maintain.
As a specific implementation manner of the top drive brake mechanism provided in the present invention, please refer to fig. 1 to 4 together, the cylinder body 21 is provided with an open structure to accommodate the cavity, the opening of the cavity is arranged toward the main shaft, and the first cylinder plug 22 is used for moving in the cavity under the hydraulic drive. Wherein the outer edge of the first brake pad 30 is located in the receiving cavity. The accommodating cavity can improve the overall space occupancy rate of the top drive brake mechanism, and meanwhile, the first brake pad 30 and the first friction plate 50 are convenient to place, the structure is simple, and the practicability is high.
As a specific implementation manner of the top drive brake mechanism provided in the embodiment of the present invention, please refer to fig. 1 to 4 together, the top drive brake mechanism further includes a second cylinder plug 23, a second brake pad 40 and a second friction plate 60. Wherein at least one second cylinder plug 23 is provided, and one second cylinder plug 23 is provided on the cylinder body 21 for being hydraulically driven to protrude into the accommodation chamber with respect to the cylinder body 21. The second brake block 40 is parallel to the first brake block 30 and arranged at an interval, and the outer edge part is positioned in the accommodating cavity and is used for being sleeved on the periphery of the main shaft and fixedly connected with the main shaft to synchronously rotate along with the main shaft. Two second friction plates 60 are arranged, the two second friction plates 60 are respectively connected with the second cylinder plugs 23 in the two sets of brake cylinder assemblies 20, and when the spindle is braked, the second friction plates 60 are driven by the second cylinder plugs 23 and are abutted against and rubbed with the second brake plates 40, so that the spindle speed is reduced, and the spindle is braked; the first cylinder plug 22 and the second cylinder plug 23 are respectively disposed at the upper and lower sides of the accommodating cavity for relative movement or back-to-back movement. The structure is that under the hydraulic driving, the first cylinder plug 22 drives the first friction plate 50, the second cylinder plug 23 drives the second friction plate 60 to move relatively at the same time, so that the first friction plate 50 is abutted against the top surface of the first brake pad 30, the second friction plate 60 is abutted against the bottom surface of the second brake pad 40, and the first brake pad 30 and the second brake pad 40 are simultaneously rubbed, so that the torque can be increased, and the braking efficiency can be improved.
As an embodiment of the present invention provides a concrete implementation manner of a top drive brake mechanism, please refer to fig. 1 to fig. 4 together, the top drive brake mechanism further includes a rebound assembly 80 for pulling back the initial position of the first friction plate 50 and the second friction plate 60, the rebound assembly 80 is provided with a plurality of sets, and each set of rebound assembly 80 includes a sliding pull rod 81 and a spring 82. The number of the sliding pull rods 81 is at least two, the two sliding pull rods 81 are arranged on two sides of the first cylinder plug 22 or the second cylinder plug 23 in parallel and at intervals, the pull rods are connected with the cylinder body 21 in a sliding mode and are arranged perpendicular to the first friction plate 50 or the second friction plate 60, one end of each of the pull rods is connected with the first friction plate 50 or the second friction plate 60, the other end of each of the pull rods extends into the cylinder body 21, a clamping portion used for being clamped with the cylinder body 21 to prevent the sliding pull rod 81 from sliding out of the cylinder body 21 is arranged at the other end of each of the sliding pull rods 81, and the sliding pull rods 81 are used for driving the first friction plate 50 or the second friction plate 60 to slide downwards or. The spring 82 is sleeved on the outer circumferential surface of the sliding pull rod 81, one end of the spring abuts against the cylinder 21, and the other end of the spring abuts against the clamping portion, and is used for bouncing the sliding pull rod 81 to pull the first friction plate 50 or the second friction plate 60 back to the initial position. This structure facilitates the sliding rod 81 to drive the first friction plate 50 and the second friction plate 60 to rebound, thereby facilitating the return stroke of the work.
The rebound assemblies 80 are provided with a plurality of groups, the number of the rebound assemblies 80 is equal to the sum of the number of the first piston plugs 22 and the number of the second piston plugs 23, one rebound assembly 80 corresponds to each first piston plug 22 or each second piston plug 23, and the structure can enhance the flexibility of the first friction plate 50 and the second friction plate 60 in rebounding.
The cylinder block 21 is provided with a cylinder tube, the first cylinder plug 22 and the second cylinder plug 23 slide in the cylinder tube in a sealing manner, the cylinder block 21 is provided with a hydraulic oil path, and the cylinder tube is communicated with an external hydraulic circuit through a hydraulic pipeline 211. In the braking process, high-pressure hydraulic oil is introduced into the hydraulic pipeline 211 to push the first cylinder plug 22 and the second cylinder plug 23 to slide, and when the hydraulic pipeline 211 is reset, the hydraulic oil flows back through the hydraulic loop, and the first friction plate 50, the second friction plate 60, the first cylinder plug 22 and the second cylinder plug 23 are reset under the action of the rebound assembly 80.
As a specific implementation manner of the top drive brake mechanism provided in the embodiment of the present invention, please refer to fig. 1 to 4 together, the first cylinder plugs 22 in each set of brake cylinder assembly 20 are at least four, and the second cylinder plugs 23 are at least four. The first cylinder plug 22 and the second cylinder plug 23 are arranged at intervals in an annular direction along the axial direction of the main shaft. The structure can keep the friction force consistent so as to improve the braking stability.
As an embodiment of the present invention, please refer to fig. 1 to 4 together, the top driving brake mechanism further includes a limiting component 70 for fixing the positions of the first brake pad 30 and the second brake pad 40, and the limiting component 70 includes a spline housing 71, an expanding sleeve 72, a first limiting structure 73 and a second limiting structure 74. The spline housing 71 is sleeved on the main shaft, disposed between the main shaft and the first and second brake pads 30 and 40, and used for limiting circumferential sliding of the first and second brake pads 30 and 40, so as to prevent slipping between the first and second brake pads 30 and 40 and the main shaft. The expansion sleeve 72 is sleeved on the main shaft and located between the spline sleeve 71 and the main shaft, and is used for fixing the spline sleeve 71. The first limiting structure 73 is arranged on the spline housing 71 and between the first brake pad 30 and the second brake pad 40, and the first limiting structure 73 abuts against the bottom surface of the first brake pad 30 and is used for limiting the position of the first brake pad 30 so as to prevent the first brake pad 30 from sliding downwards. The second limiting structure 74 is disposed on the spline housing 71, disposed below the second brake pad 40, and abutted against the bottom surface of the second brake pad 40, for limiting the position of the second brake pad 40, so as to prevent the second brake pad 40 from sliding downward. The limiting assembly 70 can limit the circumferential direction and the axial direction of the first brake pad 30 and the second brake pad 40, and can ensure that the first brake pad 30 and the second brake pad 40 rotate synchronously with the main shaft.
The inner ring surfaces of the first brake pad 30 and the second brake pad 40 are provided with spline grooves that can be engaged with the outer ring surface of the spline housing 71. The inner ring of the expansion sleeve 72 is sleeved on the main shaft, and the outer ring is abutted with the spline sleeve 71.
As the embodiment of the utility model provides a brake mechanism is driven on top a concrete implementation mode please refer to collectively and draw together fig. 1 to fig. 4, and first limit structure 73 is the holding ring, and on the holding ring cover established and the spline housing 71, be equipped with on the spline housing 71 and be used for the annular platform of holding ring rigidity, the installation of the holding ring that can be convenient for of this kind of structure also can be convenient for hold up the brake block.
As the embodiment of the utility model provides a brake mechanism is driven on top a detailed implementation mode please refer to collectively and draw in fig. 1 to fig. 4, and second limit structure 74 is the jump ring, and the jump ring is installed on spline housing 71, and wherein, is equipped with the jump ring groove that is used for the jump ring to connect on the spline housing 71, and the jump ring has simple structure, and simple to operate and characteristics that the practicality is strong hold up brake block down that can be fine.
As an embodiment of the present invention, please refer to fig. 1 to 4 together, the top drive brake mechanism further includes an intermediate friction plate 90 disposed between the first brake pad 30 and the second brake pad 40, the intermediate friction plate 90 is disposed in the accommodating cavity and connected to the cylinder 21 for abutting against the bottom surface of the first brake pad 30 and the top surface of the second brake pad 40. The intermediate friction plate 90 can be abutted against the bottom surface of the first brake pad 30 and the top surface of the second brake pad 40, so that the braking torque can be further improved, and the braking efficiency can be improved.
The above description is only exemplary of the present invention and should not be taken as limiting the scope of the present invention, as any modifications, equivalents, improvements and the like made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.
Claims (9)
1. Brake mechanism is driven on top, its characterized in that includes:
the shell is provided with a through hole for the main shaft to penetrate through;
the brake oil cylinder assemblies are arranged in two sets, the two sets of brake oil cylinder assemblies are positioned on two radial sides of the main shaft, each brake oil cylinder assembly comprises a cylinder body fixed on the shell, and the cylinder body is provided with at least one first cylinder plug which is driven by hydraulic pressure and extends out relative to the cylinder body;
the first brake pad is sleeved on the periphery of the main shaft, fixedly connected with the main shaft and synchronously rotated along with the main shaft; and
the two first friction plates are respectively connected with the first cylinder plugs in the two sets of brake oil cylinder assemblies and used for being driven by the first cylinder plugs and being in butt friction with the first brake plates when the main shaft is braked so as to reduce the speed of the main shaft and brake the main shaft.
2. A top drive brake mechanism as claimed in claim 1, wherein said cylinder block is provided with an open receiving chamber having an opening towards the spindle, said first piston being adapted to be moved into said receiving chamber by hydraulic actuation;
wherein the outer edge of the first brake pad is located in the accommodating cavity.
3. A top drive brake mechanism as claimed in claim 2 wherein said brake cylinder assembly is further provided with at least a second hydraulically actuated cylinder plug extending into said receiving cavity relative to said cylinder body, said top drive brake mechanism further comprising:
the second brake pad is parallel to the first brake pad along the axial direction of the main shaft and is arranged at intervals, and the outer edge part of the second brake pad is positioned in the accommodating cavity and is used for being sleeved on the periphery of the main shaft, fixedly connected with the main shaft and synchronously rotating along with the main shaft; and
the two second friction plates are respectively connected with the second cylinder plugs in the two sets of brake oil cylinder assemblies and are driven by the second cylinder plugs to be abutted against and rub with the second brake plates when the spindle is braked so as to reduce the speed of the spindle and brake the spindle;
the first cylinder plug and the second cylinder plug are respectively arranged on the upper side and the lower side of the accommodating cavity and used for moving relatively or moving back to back.
4. A top drive brake mechanism as claimed in claim 3, further comprising a plurality of sets of rebound assemblies for retracting the first and second friction plates to an initial position, the number of rebound assemblies being equal to the sum of the number of first and second cylinder plugs, one rebound assembly corresponding to each of the first or second cylinder plugs, each set of rebound assemblies comprising:
the sliding pull rods are arranged on two sides of the corresponding first cylinder plug or the corresponding second cylinder plug in parallel at intervals, are connected with the cylinder body in a sliding mode and are perpendicular to the first friction plate or the second friction plate, one end of each sliding pull rod is connected with the first friction plate or the second friction plate, the other end of each sliding pull rod extends into the cylinder body, a clamping portion used for being clamped with the cylinder body to prevent the sliding pull rods from sliding out of the cylinder body is arranged at the other end of each sliding pull rod, and the sliding pull rods are used for driving the first friction plate or the second friction plate to slide downwards or upwards on the cylinder body to return to an initial position; and
the spring is sleeved on the peripheral surface of the sliding pull rod, one end of the spring is abutted against the cylinder body, the other end of the spring is abutted against the clamping part, and the spring is used for bouncing the sliding pull rod to pull the first friction plate or the second friction plate back to the initial position;
and the cylinder body is provided with a sliding groove for sliding the sliding pull rod.
5. The top drive brake mechanism of claim 4, wherein there are at least four first cylinder plugs and at least four second cylinder plugs in each set of brake cylinder assemblies;
the first cylinder plug and the second cylinder plug are arranged at intervals along the axial direction of the main shaft in an annular mode.
6. The top drive brake mechanism of claim 3, further comprising a spacing assembly for fixing the position of the first brake pad or the second brake pad, the spacing assembly comprising:
the spline sleeve is sleeved on the periphery of the main shaft, positioned between the main shaft and the first brake pad and between the main shaft and the second brake pad, and used for limiting the circumferential sliding of the first brake pad and the second brake pad so as to prevent the first brake pad and the second brake pad from slipping with the main shaft;
the expansion sleeve is sleeved on the main shaft, is positioned between the spline sleeve and the main shaft and is used for fixing the spline sleeve;
the first limiting structure is fixed on the spline sleeve and arranged between the first brake pad and the second brake pad, abuts against the bottom surface of the first brake pad and is used for limiting the position of the first brake pad so as to prevent the first brake pad from sliding downwards; and
the second limiting structure is fixed on the spline sleeve, arranged below the second brake pad, abutted against the bottom surface of the second brake pad, and used for limiting the position of the second brake pad so as to prevent the second brake pad from sliding downwards;
the inner rings of the first brake pad and the second brake pad are provided with spline grooves which are matched and connected with the spline sleeve.
7. The top drive brake mechanism according to claim 6, wherein the first limiting structure is a positioning ring, the positioning ring is sleeved on the spline sleeve, and the spline sleeve is provided with an annular platform for fixing the positioning ring.
8. The top drive brake mechanism of claim 6, wherein the second limiting structure is a snap spring disposed on the spline housing;
and the spline sleeve is provided with a clamp spring groove for connecting the clamp spring.
9. A top drive brake mechanism as claimed in claim 6 further comprising an intermediate friction plate for placement between said first brake plate and said second brake plate, said intermediate friction plate being disposed in said receiving cavity and connected to said cylinder for abutment with a bottom surface of said first brake plate and a top surface of said second brake plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020712101.2U CN212004035U (en) | 2020-04-30 | 2020-04-30 | Top drive brake mechanism |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020712101.2U CN212004035U (en) | 2020-04-30 | 2020-04-30 | Top drive brake mechanism |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212004035U true CN212004035U (en) | 2020-11-24 |
Family
ID=73409600
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020712101.2U Active CN212004035U (en) | 2020-04-30 | 2020-04-30 | Top drive brake mechanism |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212004035U (en) |
-
2020
- 2020-04-30 CN CN202020712101.2U patent/CN212004035U/en active Active
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