CN111120544B - Braking device for force lifting equipment - Google Patents
Braking device for force lifting equipment Download PDFInfo
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- CN111120544B CN111120544B CN202010072900.2A CN202010072900A CN111120544B CN 111120544 B CN111120544 B CN 111120544B CN 202010072900 A CN202010072900 A CN 202010072900A CN 111120544 B CN111120544 B CN 111120544B
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- wheel
- central shaft
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- sleeve
- sheet
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D55/00—Brakes with substantially-radial braking surfaces pressed together in axial direction, e.g. disc brakes
- F16D55/02—Brakes with substantially-radial braking surfaces pressed together in axial direction, e.g. disc brakes with axially-movable discs or pads pressed against axially-located rotating members
- F16D55/04—Brakes with substantially-radial braking surfaces pressed together in axial direction, e.g. disc brakes with axially-movable discs or pads pressed against axially-located rotating members by moving discs or pads away from one another against radial walls of drums or cylinders
- F16D55/06—Brakes with substantially-radial braking surfaces pressed together in axial direction, e.g. disc brakes with axially-movable discs or pads pressed against axially-located rotating members by moving discs or pads away from one another against radial walls of drums or cylinders without self-tightening action
- F16D55/08—Mechanically-actuated brakes
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D55/00—Brakes with substantially-radial braking surfaces pressed together in axial direction, e.g. disc brakes
- F16D2055/0004—Parts or details of disc brakes
- F16D2055/0041—Resilient elements interposed directly between the actuating member and the brake support, e.g. anti-rattle springs
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Braking Arrangements (AREA)
Abstract
The invention provides a braking device for a force lifting apparatus, which consists of an external shell, a central shaft fixed in the shell and components arranged on the central shaft side by side, wherein each component comprises a rotating wheel, an external thread cylinder, a double-spring-seat wheel sheet, a compression spring, a sleeve, a friction wheel sheet I, a chain wheel, a chain, a ratchet wheel, a pawl, a tension spring and a friction wheel sheet II in sequence from left to right; the invention is used in cooperation with the barbell, is applied to various forms of strength lifting fitness and sports equipment, and can greatly reduce and offset the falling speed and impact force of the barbell when the barbell suddenly falls out of control, thereby eliminating the danger of lifting the equipment.
Description
Technical Field
The invention relates to the technical field of sports fitness equipment, in particular to a braking device for a strength lifting equipment.
Background
Strength lifting is carried out by using barbell load, and long-term adherence to training of lifting the barbell can not only enable muscles to be developed, but also enhance the endurance of the muscles; in the process of body building or strength lifting, sometimes the load reaches the limit or the force of a body building person or an athlete is exhausted due to overload, so that the hand-off error is caused, the barbell is very easy to be struck by the gravity, and the danger of injury or even death is caused. Therefore, although the strength lifting exercise has good body building effect, great exercise risks exist, and sufficient safety protection is required. However, there is no effective force lifting safety protection device currently, and in the current fitness training or force lifting competition, under the care of professionals, the danger cannot be completely avoided, and even the injury to the caretakers can be caused at the same time.
Disclosure of Invention
In order to solve the problems, the invention provides a braking device for a force lifting apparatus, which can rapidly reduce the gravity of a barbell through the braking device when the barbell suddenly falls out of control, greatly reduce and offset the falling speed and impact force of the barbell, and solve the problem that fitness personnel or athletes have injuries and even fatal risks.
The technical scheme adopted by the invention is as follows:
a braking device for a force lifting apparatus comprises an external shell, a central shaft fixed in the shell and components arranged on the central shaft side by side; the assembly comprises a rotating wheel, an external thread cylinder, a double-spring-seat wheel sheet, a compression spring, a sleeve, a friction wheel sheet I, a chain wheel, a chain, a ratchet wheel, a pawl, a tension spring and a friction wheel sheet II in sequence from left to right; the shell consists of a left cover body on the left side, a cylindrical body in the middle part and a sealing cover on the right side; the left cover body consists of a first disk, a second disk and two connecting beams, wherein the first disk and the second disk are arranged in parallel at intervals on the left and right, and the two connecting beams are symmetrically arranged up and down; the central shaft mounting hole I is formed in the central position of the first disc; a threaded hole is formed in the center of the second disc; the center of the sealing cover is provided with a second central shaft mounting hole; the part of the cylinder wall of the cylinder body of the shell, which corresponds to the position of the chain wheel, is provided with a pair of long-strip-shaped openings which are symmetrical front and back in the axial direction vertical to the cylinder body, and the chain can pass through the long-strip-shaped openings and is connected with the chain wheel; the external thread of the external thread cylinder is matched with the thread of the threaded hole of the second disc; the left end of the threaded cylinder is fixedly provided with a rotating wheel; the external thread cylinder is sleeved on the central shaft and is in threaded connection with the threaded hole of the second disc; a compression spring is arranged between the double-spring seat wheel sheets; the center part of the double spring seat wheel sheet is provided with a first through hole for a central shaft to pass through, and sliding blocks are symmetrically arranged on the wall of the double spring seat wheel sheet in the first through hole relative to the section passing through the axial line of the double spring seat wheel sheet; the double spring seat wheel sheet and the compression spring are sleeved on the central shaft; the left half wall of the central shaft is symmetrically provided with sliding chutes relative to the section passing through the axis of the central shaft; the sliding block is embedded into the sliding groove, and the double-spring seat wheel sheet is connected in the sliding groove on the central shaft in a sliding way to limit the rotation of the double-spring seat wheel sheet around the central shaft; the sleeve is sleeved on the central shaft and can rotate around the central shaft; two ends and the middle part of the outer wall of the sleeve are respectively and symmetrically provided with a first key groove and a second key groove; a through hole II for the sleeve to pass through is formed in the center of the first friction wheel sheet; two ends of the sleeve are respectively provided with a first friction wheel sheet in interference fit through two through holes; the wall of the friction wheel piece I in the through hole II is symmetrically provided with a key groove III relative to the section passing through the axis of the friction wheel piece I, the key groove III is fixed at two ends of the sleeve through the key groove I and a flat key in a matching manner, and the outer surface of the friction wheel piece I and the end surface of the sleeve are on the same plane; the chain wheel is in interference connection with the middle part of the sleeve through a bearing and is fixed on the sleeve through a flat key and a key groove II in a matched mode, and the chain wheel is in rotational connection with the sleeve; protective contours are arranged on two sides of the chain wheel; a pawl is rotatably connected to the right side surface of the chain wheel through a fixed shaft, and a tension spring is arranged on the pawl; the ratchet wheel is sleeved on the central shaft and can rotate around the central shaft, the ratchet wheel is arranged right below the pawl, and the pawl is meshed with the ratchet wheel under the action of the tension spring; a third through hole for a central shaft to pass through is formed in the central part of the second friction wheel sheet; a key groove IV is symmetrically formed in the wall of the friction wheel II in the through hole III relative to the section passing through the axis of the friction wheel II; a key groove V is symmetrically arranged on the right end wall of the central shaft relative to the section passing through the axis of the central shaft; the friction wheel piece II is fixed at the right end of the central shaft through the key groove IV, the key groove V and the flat key in a matching manner; the chain is connected with two ends of the weight lifting rod through the fixing piece.
The external thread cylinder, the double spring seat wheel sheet, the sleeve, the friction wheel sheet I, the chain wheel, the ratchet wheel and the friction wheel sheet II are arranged on the central shaft or the sleeve without gaps.
The compression spring has certain pre-tightening pressure after being installed.
The diameter of the profile of the chain wheel is larger than that of the first friction wheel sheet; the diameters of the first friction wheel sheet and the second friction wheel sheet are the same; the diameter of the ratchet wheel is smaller than the diameters of the first friction wheel sheet and the second friction wheel sheet.
The left cover body and the right cover are respectively fixedly connected with the two ends of the middle cylindrical body through screws and screw holes; and the two ends of the central shaft are provided with threads, and the central shaft penetrates through the first mounting hole and the second mounting hole and then is fixed on the shell through nuts.
And a lubricating oil filling hole is formed in the position, corresponding to the pawl, of the upper end of the shell.
The invention has the beneficial effects that:
the invention has the advantages of simple structure, strong mechanical property, wear resistance, impact resistance and long service life.
Secondly, the invention solves the problem that when the barbell suddenly falls out of control, the gravity of the barbell is rapidly reduced through the braking device, the falling speed and impact force of the barbell are greatly reduced and offset, and the danger that body-building personnel or athletes are injured or even fatal is solved.
Thirdly, the braking device of the invention has wide application range, can be used for various forms of strength lifting in fitness and sports equipment, has strong safety, and does not need professional coaches for on-site nursing.
Drawings
FIG. 1 is a cross-sectional view of the present invention;
FIG. 2 is a schematic view of an exploded structure of the present invention;
FIG. 3 is an exploded view of the housing of the present invention;
fig. 4 is a schematic structural diagram of an embodiment of the present invention.
Wherein: a housing 1; a left cover 101; a first disk 1011; a second disk 1012; a connecting beam 1013; a first mounting hole 1014; a threaded aperture 1015; a cylindrical body 102; an elongated opening 1021; a cover 103; a second mounting hole 1031; a central shaft 2; a chute 201; a keyway five 202; a runner 3; an externally threaded barrel 4; a double spring seat wheel sheet 5; a first through hole 501; a slider 502; a compression spring 6; a sleeve 7; a first key slot 701; a second keyway 702; a first friction wheel sheet 8; a second through hole 801; a keyway three 802; a sprocket 9; a bearing 901; a guard profile 902; a chain 10; a ratchet 11; a pawl 12; a tension spring 13; a second friction wheel sheet 14; a third through-hole 1401; a keyway four 1402; a flat key 15; a nut 16; a weight lifting rod 17.
Detailed Description
As shown in fig. 1 to 4:
a braking device for a force lifting apparatus comprises an external shell 1, a central shaft 2 fixed in the shell 1 and components arranged on the central shaft 2 side by side, wherein the components sequentially comprise a rotating wheel 3, an external thread cylinder 4, a double-spring seat wheel sheet 5, a compression spring 6, a sleeve 7, a friction wheel sheet I8, a chain wheel 9, a chain 10, a ratchet wheel 11, a pawl 12, a tension spring 13 and a friction wheel sheet II 14 from left to right; the shell 1 consists of a left cover body 101 at the left side, a cylindrical body 102 at the middle part and a right sealing cover 103; the left cover body 101 consists of a first disk 1011 and a second disk 1012 which are arranged in parallel at intervals on the left and right, and two connecting beams 1013 which are symmetrically arranged up and down; the two connecting beams 1013 fixedly connect the first disk 1011 and the second disk 1012 together, and the left cover body 101 is a one-time molding structure; the left cover body 101 forms two large arc-shaped windows which are symmetrical front and back, so that the rotating wheel 3 can be placed in the left cover body 101 for installation; a first mounting hole 1014 of the central shaft 2 is formed in the center of the first disc 1011; a threaded hole 1015 is formed in the center of the second circular disc 1012; the center of the cover 103 is provided with a second mounting hole 1031 of the central shaft 2; a pair of long open holes 1021 which are symmetrical in the front and back are arranged on the cylinder arm of the cylinder body 102 of the shell 1 corresponding to the position of the chain wheel 9 in the axial direction vertical to the cylinder body 102, and the chain 10 can pass through and be connected with the chain wheel 9; the external thread of the external thread cylinder 4 is matched with the thread of the threaded hole 1015 of the second circular disc 1012; the left end of the external thread cylinder 4 is fixedly provided with a rotating wheel 3; the external thread cylinder 4 is sleeved on the central shaft 2 and is screwed in the threaded hole 1015 of the second circular disc 1012, and the external thread cylinder 4 retracts on the central shaft 2 by rotating the rotating wheel 3; a compression spring 6 is arranged between the double-spring seat wheel sheets 5; a through hole I501 through which the central shaft 2 can pass is arranged at the central part of the double-spring seat wheel piece 5, and sliding blocks 502 are symmetrically arranged on the wall of the double-spring seat wheel piece 5 in the through hole I501 relative to the section passing through the axis of the double-spring seat wheel piece 5; the double-spring seat wheel sheet 5 and the compression spring 6 are sleeved on the central shaft 2; the compression spring 6 has certain pre-tightening pressure after being installed; the left half arm of the central shaft 2 is symmetrically provided with sliding chutes 201 relative to the section passing through the central shaft 2; the sliding block 502 is embedded into the sliding groove 201, and the double spring seat wheel sheet 5 is connected in the sliding groove 201 on the central shaft 2 in a sliding way to limit the rotation of the double spring seat wheel sheet around the central shaft 2; the sleeve 7 is sleeved on the central shaft 2 and can rotate around the central shaft 2; a first key groove 701 and a second key groove 702 are symmetrically arranged at the two ends and the middle part of the outer wall of the sleeve 7 respectively; a second through hole 801 through which the sleeve 7 can pass is formed in the center of the first friction wheel sheet 8; two ends of the sleeve 7 are respectively provided with a friction wheel piece I8 in interference fit through a through hole II 801; the wall of the friction wheel piece I8 in the through hole II 801 is symmetrically provided with a key groove III 802 relative to the section passing through the axis of the sleeve 7, the key groove III 701 and the flat key 15 are matched and fixed at two ends of the sleeve 7, and the outer surface of the friction wheel piece I8 and the end surface of the sleeve 7 are on the same plane, so that the double-spring seat wheel piece 5 and the friction wheel piece I8 are completely attached; the chain wheel 9 is in interference connection with the middle of the sleeve 7 through a bearing 901 and is fixed on the sleeve 7 through a flat key 15 and a key groove II 702 in a matching manner, and the chain wheel 9 is rotationally connected with the sleeve 7; two sides of the chain wheel 9 are provided with protective profiles 902 to prevent chain jumping, groove falling and chain clamping; a pawl 12 is rotatably connected to the right side surface of the chain wheel 9 through a fixed shaft, and a tension spring 13 is arranged on the pawl 12; the ratchet wheel 11 is sleeved on the central shaft 2 and can rotate around the central shaft 2, the ratchet wheel 11 is arranged right below the pawl 12, and the pawl 12 is meshed with the ratchet wheel 11 under the action of the tension spring 13; the tail end of the pawl 12 is bent inwards, so that the pawl 12 is conveniently and fully meshed with the ratchet wheel 11; the center part of the second friction wheel sheet 14 is provided with a through hole three 1401 for the central shaft 2 to pass through; a key groove four 1402 is symmetrically arranged on the wall of the second friction wheel piece 14 in the through hole three 1401 relative to the section of the axis of the second friction wheel piece 14; a fifth key groove 202 is symmetrically formed in the right end wall of the central shaft 2 relative to the section passing through the axis of the central shaft 2; the second friction wheel piece 14 is fixed at the right end of the central shaft 2 through the fourth key slot 1402, the fifth key slot 202 and the flat key 15 in a matching way.
The external thread cylinder 4, the double spring seat wheel sheet 5, the sleeve 7, the friction wheel sheet I8, the chain wheel 9, the ratchet wheel 11 and the friction wheel sheet II 14 are arranged on the central shaft 2 or the sleeve 7 in a gapless mode, the external thread cylinder 4 extrudes the double spring seat wheel sheet 5 by rotating the rotating wheel 3, tension formed by contraction of the compression spring 6 is sequentially transmitted to the friction wheel sheet I8, the ratchet wheel 11 and the friction wheel sheet II 14, and a whole body which is extruded mutually and has certain friction force is formed.
The diameter of the protective profile 902 of the chain wheel 9 is larger than that of the first friction wheel sheet 8; the diameters of the first friction wheel sheet 8 and the second friction wheel sheet 14 are the same; the diameter of the ratchet wheel 11 is smaller than the diameters of the first friction wheel piece 8 and the second friction wheel piece 14, the arrangement is that a hanging shaft of a pawl 12 on the chain wheel 9 is arranged right above the ratchet wheel 11 across the first friction wheel piece 8, and a natural groove is formed between the first friction wheel piece 8, the second friction wheel piece 14 and the ratchet wheel 11, so that the pawl 12 is limited, the pawl 12 is prevented from being displaced, twisted and deformed under the impact force of the ratchet wheel 11, and the burden of the hanging shaft of the pawl 12 is relieved.
The left cover body 101 and the right cover 103 are respectively fixedly connected with two ends of the cylindrical body 102 at the middle part through screws and screw holes; two ends of the central shaft 2 are provided with threads, and the central shaft is fixed on the shell 1 through a nut 16 after passing through the first mounting hole 1014 and the second mounting hole 1031.
The chain 10 is connected with two ends of the weight lifting rod 17 through fixing pieces; when the lifting rod 17 moves upwards to drive the chains 10 at the two ends to move upwards and the chain wheel 9 rotates anticlockwise, the first friction wheel sheet 8, the sleeve 7, the ratchet wheel 11 and the second friction wheel sheet 14 form a whole which is extruded mutually and has certain friction force and is in a relatively static state; the pawl 12 beats rhythmically along the ratchet groove of the ratchet 11 under the action of the tension spring 13; when the weight lifting rod 17 falls, the chain wheel 9 rotates clockwise, the pawl 12 is clamped into a ratchet groove of the ratchet wheel 11 under the action of the tension spring 13, the chain wheel 9, the ratchet wheel 11, the sleeve 7 and the friction wheel piece I8 synchronously rotate clockwise around the central shaft 2 under the action of friction force, the friction force generated between the friction wheel piece I8 and the static double-spring seat wheel piece 5 and the friction force generated between the ratchet wheel 11 and the static friction wheel piece II 14 overcome the gravity of the weight lifting rod 17 on the chain 10, and the impact force and the danger of the barbell on a human body are reduced.
The upper end of the shell 1 corresponding to the pawl 12 is provided with a lubricating oil filling hole (not marked in the drawing) for lubricating the rotation of the pawl 12 around the rotating shaft and the sliding around the ratchet wheel 11 to reduce friction, enhance mechanical performance and prolong service life.
The working principle and the using method are as follows:
the working principle is as follows: the external thread cylinder 4 extrudes the double-spring seat wheel sheet 5 by rotating the rotating wheel 3, the compression spring 6 contracts to form certain tension, and the certain tension is sequentially transmitted to the friction wheel sheet I8, the sleeve 7, the ratchet 11 and the friction wheel sheet II 14 to form a whole which is extruded mutually and has certain friction force, and the whole is in a relatively static state when the lifting rod 1 moves upwards to drive the chains 10 at the two ends to move upwards and the chain wheel 9 rotates anticlockwise; the pawl 12 beats rhythmically along the ratchet groove of the ratchet 11 under the action of the tension spring 13; when the weight lifting rod 1 falls, the chain wheel 9 rotates clockwise, the pawl 12 is clamped into a ratchet groove of the ratchet wheel 11 under the action of the tension spring 13, the chain wheel 9, the ratchet wheel 11, the sleeve 7 and the friction wheel piece I8 synchronously rotate clockwise around the central shaft 2 under the action of friction force, the friction force generated between the friction wheel piece I8 and the static double-spring seat wheel piece 5 and the friction force generated between the ratchet wheel 11 and the static friction wheel piece II 14 overcome the gravity of the weight lifting rod 1 on the chain 10, and the impact force and the danger of the barbell on a human body are reduced.
The using method comprises the following steps: during the specific use, the friction force needs to be set according to the training requirement, if the fitness requirement is met, the barbell needs to be frequently lifted up and down, and the sum of the friction forces of the four braking devices 3 is smaller than the weight of the barbell to be lifted; if the weight lifting match is carried out, under the condition that the friction forces on the upper, lower, left and right braking devices 3 are equal, the sum of the friction forces is equal to or slightly larger than the weight of the limit value of the self weight lifting; when the total friction force is larger than the weight of the weight, the user can pull down slowly with strong force. The magnitude of the frictional force can be set according to the weight required by the user. Before the weight lifting, the barbell assembled with a certain weight is placed on the bearing plate, the rotating wheels 3 on the four braking devices are rotated anticlockwise, so that the tension of the compression spring 6 is just zero (the weight lifting rod 17 can freely move up and down under the condition of not balancing the weight), then the rotating wheels 3 on the four braking devices are rotated clockwise and the number of rotating circles is the same, the barbell can be hung on the chain 9 until the barbell is lifted by two hands, the friction force can be adjusted randomly after the balance point is found, and then the barbell disc is reduced or increased or decreased.
The invention is not limited to the above-described embodiments, and from the above description, obvious modifications may be made by those skilled in the art, which modifications are within the scope of the claims of the invention.
Claims (6)
1. A braking device for a force lifting apparatus comprises an external shell, a central shaft fixed in the shell and components arranged on the central shaft side by side; the assembly comprises a rotating wheel, an external thread cylinder, a double-spring-seat wheel sheet, a compression spring, a sleeve, a friction wheel sheet I, a chain wheel, a chain, a ratchet wheel, a pawl, a tension spring and a friction wheel sheet II in sequence from left to right; the shell consists of a left cover body on the left side, a cylindrical body in the middle part and a sealing cover on the right side; the left cover body consists of a first disk, a second disk and two connecting beams, wherein the first disk and the second disk are arranged in parallel at intervals on the left and right, and the two connecting beams are symmetrically arranged up and down; a central shaft mounting hole I is formed in the central position of the first disc; a threaded hole is formed in the center of the second disc; a central shaft mounting hole II is formed in the center of the sealing cover; the part of the cylinder wall of the cylinder body of the shell, which corresponds to the position of the chain wheel, is provided with a pair of long-strip-shaped openings which are symmetrical front and back in the axial direction vertical to the cylinder body, and the chain can pass through the long-strip-shaped openings and is connected with the chain wheel; the external thread of the external thread cylinder is matched with the thread of the threaded hole of the second disc; the left end of the external thread cylinder is fixedly provided with a rotating wheel; the external thread cylinder is sleeved on the central shaft and is in threaded connection with the threaded hole of the second disc; a compression spring is arranged between the double-spring seat wheel sheets; the center part of the double spring seat wheel sheet is provided with a first through hole for a central shaft to pass through, and sliding blocks are symmetrically arranged on the wall of the double spring seat wheel sheet in the first through hole relative to the section passing through the axial line of the double spring seat wheel sheet; the double spring seat wheel sheet and the compression spring are sleeved on the central shaft; the left half wall of the central shaft is symmetrically provided with sliding chutes relative to the section passing through the axis of the central shaft; the sliding block is embedded into the sliding groove, and the double-spring seat wheel sheet is connected in the sliding groove on the central shaft in a sliding way to limit the rotation of the double-spring seat wheel sheet around the central shaft; the sleeve is sleeved on the central shaft and can rotate around the central shaft; two ends and the middle part of the outer wall of the sleeve are respectively and symmetrically provided with a first key groove and a second key groove; a through hole II for the sleeve to pass through is formed in the center of the first friction wheel sheet; two ends of the sleeve are respectively provided with a first friction wheel sheet in interference fit through two through holes; the wall of the friction wheel piece I in the through hole II is symmetrically provided with a key groove III relative to the section passing through the axis of the friction wheel piece I, the key groove III is fixed at two ends of the sleeve through the key groove I and a flat key in a matching manner, and the outer surface of the friction wheel piece I and the end surface of the sleeve are on the same plane; the chain wheel is in interference connection with the middle part of the sleeve through a bearing and is fixed on the sleeve through a flat key and a key groove II in a matched mode, and the chain wheel is in rotational connection with the sleeve; protective contours are arranged on two sides of the chain wheel; a pawl is rotatably connected to the right side surface of the chain wheel through a fixed shaft, and a tension spring is arranged on the pawl; the ratchet wheel is sleeved on the central shaft and can rotate around the central shaft, the ratchet wheel is arranged right below the pawl, and the pawl is meshed with the ratchet wheel under the action of the tension spring; a third through hole for a central shaft to pass through is formed in the central part of the second friction wheel sheet; a key groove IV is symmetrically formed in the wall of the friction wheel II in the through hole III relative to the section passing through the axis of the friction wheel II; a key groove V is symmetrically arranged on the right end wall of the central shaft relative to the section passing through the axis of the central shaft; the friction wheel piece II is fixed at the right end of the central shaft through the key groove IV, the key groove V and the flat key in a matching manner; the chain is connected with two ends of the weight lifting rod through the fixing piece.
2. The braking device for a force lifting apparatus as claimed in claim 1, wherein the externally threaded cylinder, the double spring seat wheel piece, the sleeve, the first friction wheel piece, the chain wheel, the ratchet wheel and the second friction wheel piece are mounted on the central shaft or the sleeve without any gap therebetween.
3. The braking device for force lifting equipment as claimed in claim 1, wherein the compression spring is installed with a certain pre-tightening pressure.
4. The braking device for a force lifting apparatus as claimed in claim 1, wherein the profile of the sprocket wheel has a diameter larger than the diameter of the first friction wheel; the diameters of the first friction wheel sheet and the second friction wheel sheet are the same; the diameter of the ratchet wheel is smaller than the diameters of the first friction wheel sheet and the second friction wheel sheet.
5. The braking device for a force lifting apparatus as claimed in claim 1, wherein the left cover and the right cover are respectively fixed to the two ends of the middle cylindrical body by screws and bolt holes; and the two ends of the central shaft are provided with threads, and the central shaft penetrates through the first mounting hole and the second mounting hole and then is fixed on the shell through nuts.
6. The braking device for the power lifting equipment as claimed in claim 1, wherein a lubricating oil filling hole is formed at a position of the upper end of the casing corresponding to the pawl.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010072900.2A CN111120544B (en) | 2020-01-09 | 2020-01-09 | Braking device for force lifting equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010072900.2A CN111120544B (en) | 2020-01-09 | 2020-01-09 | Braking device for force lifting equipment |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111120544A CN111120544A (en) | 2020-05-08 |
| CN111120544B true CN111120544B (en) | 2021-06-08 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010072900.2A Active CN111120544B (en) | 2020-01-09 | 2020-01-09 | Braking device for force lifting equipment |
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| CN (1) | CN111120544B (en) |
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| CN209835496U (en) * | 2019-04-19 | 2019-12-24 | 杭州契卡拉起重机械有限公司 | Double-hook chain block with braking structure |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US9994433B2 (en) * | 2016-02-18 | 2018-06-12 | Jpw Industries Inc. | Brake/clutch device for manual hoist |
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|---|---|---|---|---|
| CN201434029Y (en) * | 2009-07-03 | 2010-03-31 | 海城市石油机械制造有限公司 | Main brake safety mechanism |
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| CN109386224A (en) * | 2017-08-10 | 2019-02-26 | 肖群伟 | Automatically rise new type auto lifting roller shutter head |
| CN109011342A (en) * | 2018-08-06 | 2018-12-18 | 深圳市诚朗科技有限公司 | Security protection and training integrated barbell when one kind pushing away trained for crouching |
| CN109847276A (en) * | 2018-12-24 | 2019-06-07 | 哈工大机器人义乌人工智能研究院 | Powerlifting telecontrol equipment with function of safety protection |
| CN209835496U (en) * | 2019-04-19 | 2019-12-24 | 杭州契卡拉起重机械有限公司 | Double-hook chain block with braking structure |
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| CN111120544A (en) | 2020-05-08 |
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