CN211550341U - Speed limiting device of descending protector - Google Patents
Speed limiting device of descending protector Download PDFInfo
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- CN211550341U CN211550341U CN202020141898.5U CN202020141898U CN211550341U CN 211550341 U CN211550341 U CN 211550341U CN 202020141898 U CN202020141898 U CN 202020141898U CN 211550341 U CN211550341 U CN 211550341U
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Abstract
The utility model relates to a speed limiting device of a descending protector, which comprises an access shaft with a gear, a one-way bearing, a movable core block, a centrifugal block, a friction block and a shell; the movable core block is positioned on the access shaft through a one-way bearing, and the access shaft drives the movable core block to rotate in one direction; the centrifugal block is positioned on the movable core block, and the friction block is locked at the outer edge of the centrifugal block and can abut against the inner surface of the shell to form friction; the method is characterized in that: more than two centrifugal blocks are positioned on the movable core block through the front fixing piece and the rear fixing piece, can do radial movement relative to the movable core block, and are kept in radial contraction trend by the springs. The utility model has the characteristics of ingenious conception, reasonable design and speed limit protection; particularly, the centrifugal block is matched with the spring, the friction force is increased along with the increase of the descending speed, the descending speed limiting protection effect is achieved, the resistance can be reduced at low speed, and the friction loss of equipment is also reduced.
Description
The technical field is as follows:
the utility model belongs to rock climbing or high altitude construction's protection equipment field, in particular to decline protector speed limiting device, especially centrifugal piece have the function of contracting back.
Background art:
patent application No.: CN201821674697.0 discloses a multifunctional self-recovery type descent protector, which comprises a housing, and a speed control mechanism, a transmission mechanism, a rope mechanism and a self-recovery mechanism arranged in the housing, wherein the speed control mechanism is connected with the rope mechanism through the transmission mechanism, and the rope mechanism is connected with the self-recovery mechanism; the speed control mechanism comprises a first speed control mechanism and a second speed control mechanism.
The first speed control mechanism comprises a friction wheel body, a friction block and a one-way bearing connected with the friction wheel body, and the one-way bearing controls the friction wheel body to move in one direction; the edge of the friction wheel body is provided with a plurality of clamping grooves with arc structures which are circumferentially arranged at equal intervals, the friction block is fixed in the clamping grooves, and damping columns are embedded in two ends of the friction block; the second speed control mechanism comprises a recovery resistance ring and a recovery resistance block, and the recovery resistance block is fixedly connected with the recovery resistance ring through a cylindrical pin.
A speed control central shaft in the transmission mechanism is sequentially fixed with a recovery resistance ring, a one-way bearing and a pinion from left to right; the small gear is meshed with the large gear, and the large gear is fixed on the rope mechanism; the rope mechanism comprises a main disc and a rope wound on the main disc, the main disc is arranged in the main shell, the main disc is connected with the main shaft through a bearing, and two ends of the main shaft are respectively fixed on the side wall of the main shell; the self-recovery mechanism comprises a coil spring bottom plate, a coil spring inner shaft sleeve, a coil spring and a coil spring cover plate, wherein the coil spring bottom plate is fixed on the main disc, the coil spring inner shaft sleeve is sleeved on the main shaft, the coil spring is connected with the coil spring inner shaft sleeve, and the coil spring cover plate is fixed on the main shaft through a coil spring cover plate retainer ring.
The friction wheel body in the mechanism is of an integral wheel type structure, and a friction block arranged in a clamping groove always keeps friction with a shell of the speed control mechanism, keeps constant friction force and is not matched with the descending speed.
The invention content is as follows:
the utility model aims at designing a decline protector speed limiting device that is provided with the spring on the centrifugal piece, and frictional force reduces thereupon at low-speed decline.
The utility model discloses technical scheme realizes like this:
a speed limiting device of a descending protector comprises an access shaft with a gear, a one-way bearing, a movable core block, a centrifugal block, a friction block and a shell; the movable core block is positioned on the access shaft through a one-way bearing, and the access shaft drives the movable core block to rotate in one direction; the centrifugal block is positioned on the movable core block, and the friction block is locked at the outer edge of the centrifugal block and can abut against the inner surface of the shell to form friction; the method is characterized in that: more than two centrifugal blocks are positioned on the movable core block through the front fixing piece and the rear fixing piece, can do radial movement relative to the movable core block, and are kept in radial contraction trend by the springs.
The centrifugal blocks are two and are symmetrically distributed on the outer side of the movable core block, the two ends of each centrifugal block are provided with slotted holes or long slotted holes which are parallel to each other, the centrifugal blocks are positioned on the movable core block by virtue of the front fixing pieces and the rear fixing pieces and the bolt pins, the movable core block drives the centrifugal blocks to rotate, and the centrifugal blocks can radially open under the action of centrifugal force; the spring for driving the contraction action is a tension spring which is arranged between two ends of the two centrifugal blocks to form a counter-pulling trend for overcoming the centrifugal force.
The centrifugal blocks are more than three and are rotationally and symmetrically distributed on the outer side of the movable core block, each centrifugal block is provided with a radial long slotted hole, the centrifugal blocks are positioned on the movable core block by means of the front fixing piece and the rear fixing piece through the bolt pin, the movable core block drives the centrifugal blocks to rotate, and the centrifugal blocks can radially open under the action of centrifugal force; the spring of drive shrink action is the extension spring, and the extension spring sets up to as an alternative structure as follows: firstly, two ends of a tension spring are respectively suspended between the end faces of adjacent centrifugal blocks; and two ends of the tension spring are respectively suspended between the centrifugal block and the movable core block.
The circumference of the movable core block is also provided with a radial pin rod, and the end part of the radial pin rod can be abutted against the inner cambered surface of the centrifugal block.
The movable core block is arranged on the circumference of one side sleeved with the one-way bearing and is also provided with one-way teeth; a key groove radially penetrates through the access shaft covered by the one-way teeth, and a sliding key is arranged in the key groove and can be hung on the one-way teeth in the clamping direction of the one-way bearing.
The sliding key is of a rectangular structure, and the rear edge angle corresponding to the blocking direction is rounded.
The movable core block is provided with a one-way groove on the circumference of one side sleeved with the one-way bearing, a roll shaft is arranged between the access shafts covered by the one-way groove, and the roll shaft is positioned in the blocking direction of the one-way bearing and can enter the one-way groove to be blocked between the access shafts and the movable core block.
A friction ring is embedded in the shell and is contacted with the friction block by virtue of the friction ring.
The front and rear fixing pieces are correspondingly embedded at the front and rear ends of the movable core block; the front and rear fixing pieces are also attached to the front and rear end faces of the centrifugal block and are positioned together through bolt pins.
The utility model has the characteristics of ingenious conception, reasonable design and speed limit protection; particularly, the centrifugal block is matched with the spring, and the friction force is increased along with the increase of the descending speed, so that the centrifugal block plays a role in descending speed limiting protection, can reduce the resistance at a low speed and also reduces the friction loss of equipment; and then, the one-way bearing is matched with the one-way mechanism, the characteristics of good synchronism and rapid and direct response of the one-way bearing are utilized, and the one-way bearing is supposed to be damaged or failed and is also responsible for the one-way mechanism, so that seamless switching is realized, and a double-insurance effect is achieved. And then, the high-wear-resistance and high-strength woven belts are adopted in the automatic recovery rope reel, so that the safety of the equipment is comprehensively improved.
Description of the drawings:
the present invention will be further explained with reference to the following specific drawings:
FIG. 1 is a schematic view of a descent protector
FIG. 2 is an exploded view of the descent protector
FIG. 3 is a schematic sectional view of a speed limiting device of the descending protector
FIG. 4 is an exploded view of the speed limiting device of the descending protector
FIG. 5 is an exploded view of the centrifugal block of the governor device
FIG. 6 is an exploded view of the movable core block and the connecting shaft
Wherein
1-connecting shaft 11-keyway 12-sliding key 121-radius
13-gear 2-one-way bearing 21-bearing 3-movable core block
31-radial pin rod 32-one-way tooth 4-centrifugal block 41-front fixing piece
42-rear fixing piece 43-long slotted hole 5-friction block 6-shell
61-end cover 62-friction ring 7-spring 8-bolt pin
9-automatic recovery rope reel 91-big gear
The specific implementation mode is as follows:
referring to fig. 1 to 6, the speed limiting device of the descending protector comprises an access shaft 1 with a gear, a one-way bearing 2, a movable core block 3, a centrifugal block 4, a friction block 5 and a shell 6; the shell 6 has a cylindrical structure, the front end is provided with an end cover 61, the access shaft 1 forms supporting and positioning with the shell 6 and the end cover 61 through two bearings 21, the end part of the access shaft 1 extending out of the shell is locked with a gear 13, and the gear 13 is meshed with a large gear 91 in the automatic recovery rope reel 9, so that the rope is converted into high-speed rotation of the access shaft 1 due to the descending and pulling speed.
As shown in fig. 3 to 6, the movable core block 3 is positioned on the access shaft 1 through the one-way bearing 2, the access shaft 1 drives the movable core block 3 to rotate in one way, when the rope is recovered by the automatic rope recovery disc 9, the one-way bearing 2 slips, and the rope recovery action can be completed without resistance; the centrifugal block 4 is positioned on the movable core block 3, the friction block 5 is locked at the outer edge of the centrifugal block 4, the movable core block 3 rotates at a high speed, the centrifugal block 4 opens outwards under the action of centrifugal force, and the friction block 5 is abutted against the inner surface of the shell 6 to form friction speed limit.
The more than two centrifugal blocks 4 are positioned on the movable core block 3 through the front fixing pieces 41 and the rear fixing pieces 42, can rotate along with the movable core block 3, can do radial movement relative to the movable core block 3, and keep the radial contraction trend by the spring 7, namely the friction force is reduced after the low-speed centrifugal force is reduced.
In this example, the centrifugal block 4 is two, symmetrically distributed on the outer side of the movable core block 3, two ends of the centrifugal block 3 are provided with slotted holes or long slotted holes 43 parallel to each other, and the centrifugal block 4 is driven to rotate by the movable core block 3 by means of the front and rear fixing pieces 41 and 42 and positioned on the movable core block 3 through the bolt pin 8, and can be radially opened under the action of centrifugal force; the spring 7 for driving the contraction action is a tension spring which is arranged between two ends of the two centrifugal blocks 4 to form a counter-pulling trend for overcoming the centrifugal force. The symmetrical design of the two centrifugal blocks 4 is adopted, so that the four long slotted holes 43 are kept parallel, the springs 8 at the two ends are also mutually parallel, the processing and the assembly are easy, the radial expansion or retraction can be realized under the action of centrifugal force or spring force, the automatic adjustment can be carried out along with the descending speed, the speed limit of the maximum descending speed is met, and the automatic safety protection is realized. Alternatively, the slot 43 may be a slot that is conventionally larger than the bolt pin 8, so that the eccentric mass 4 has the freedom to expand and retract, but is held centered by a spring 7 or the like, which is actually illustrated in fig. 5.
Considering that only two friction blocks 5 are used to form friction resistance in this example, and the molding material of the housing 6 influences friction and other factors, a specially designed friction ring 62 is embedded in the housing 6, and the friction ring 62 contacts with the friction blocks 5, so that the housing 6 is more flexible to process.
In addition, the front and back fixed sheets 41, 42 and the front and back end of the movable core block 3 are processed with corresponding and anastomotic non-circular matching parts, the front and back fixed sheets 41, 42 are correspondingly embedded in the front and back end of the movable core block 3 and can be additionally locked by screws, so that the tangential stress of the screws can be greatly reduced; the front and rear fixing pieces 41 and 42 are also attached to the front and rear end faces of the centrifugal block 4 and are positioned together by the bolt pin 8.
In another example, the centrifugal block 4 is more than three, preferably three or four, and is rotationally and symmetrically distributed on the outer side of the movable core block, each centrifugal block 4 is provided with a radial long slot 43, and is positioned on the movable core block 3 through the bolt pin 8 by means of the front and rear fixing pieces 41 and 42, the centrifugal block 4 is driven by the movable core block 3 to rotate, and can be radially opened under the action of centrifugal force; the spring 7 for driving the contraction action is also a tension spring, and the tension spring is provided with the following preferred structure: firstly, two ends of a tension spring are respectively suspended between the end surfaces of adjacent centrifugal blocks 4, namely the tension spring and the adjacent centrifugal blocks are mutually wound into a ring, and the resultant force of the spring 7 can synchronously pull the plurality of centrifugal blocks 4 to the circle center to form retraction action; two ends of the tension spring are respectively suspended between the centrifugal block 4 and the movable core block 3, so that two tension springs can be used for forming a balance action, and one tension spring can be used for realizing a centered design.
The slotted hole 43 is matched with the bolt pin 8, if the design is a double-slot design, the centrifugal block 4 can only be opened or retracted along the direction parallel to the slotted hole 43, but the design adopts a single-slotted hole design, and the section of the matched bolt pin 8 adopts a rectangular structure, so that the movement direction of the centrifugal block 4 can be restrained as well.
In order to keep the centrifugal block 4 and the movable core block 3 having an expanding and retracting centrifugal motion space, the centrifugal block 4 is designed in an annular shape and is positioned on the outer circumference of the movable core block 3, therefore, a radial pin rod 31 is also arranged on the circumference of the movable core block 3, the end part of the radial pin rod 31 can be abutted against the inner arc surface of the centrifugal block 4 to form a retracting limiting function, and a pulling and pushing state is formed together with the pulling force of a spring, so that the vibration gap is eliminated, and unnecessary noise is reduced.
The load of the one-way bearing 2 cannot be too large due to the structure, and even if the design of the double one-way bearing 2 is adopted, the risk of damage and slipping exists, and for this reason, the following two combinations are preferably selected in the application:
the movable core block 3 is arranged on the circumference of one side sleeved with the one-way bearing and is also provided with one-way teeth 32; a key groove 11 is radially penetrated through the coupling shaft 1 covered by the one-way tooth 32, and a sliding key 12 is provided in the key groove, and the sliding key 12 can be hooked on the one-way tooth 32 in the direction in which the one-way bearing 2 is locked. The sliding key 12 is matched with the one-way tooth 32, a dislocation rotating stroke is needed between the movable core block 3 and the access shaft 1, and the one-way bearing 2 does not need the stroke, so the one-way bearing 2 is used for acting in a normal state, and the sliding key and the like only act after the one-way bearing fails, thereby forming a double-insurance effect. Further, the sliding key 12 is of a rectangular structure, the rear corner corresponding to the blocking direction is a rounded corner 121, and the sliding key can be smoothly driven by the inclined surface of the one-way tooth 32 without influencing the rope winding action.
And secondly, the movable core block 3 is also provided with a one-way groove on the circumference of one side sleeved with the one-way bearing 2, a roll shaft is arranged between the access shafts 1 covered by the one-way groove, and the roll shaft can enter the one-way groove in the clamping direction of the one-way bearing 2 and be clamped between the access shafts 1 and the movable core block 3, namely the roll shaft is brought into the inclined plane of the one-way groove and the narrow end of the access shaft. The principle is similar to the above one, and the illustration is omitted.
Claims (9)
1. A speed limiting device of a descending protector comprises an access shaft with a gear, a one-way bearing, a movable core block, a centrifugal block, a friction block and a shell; the movable core block is positioned on the access shaft through a one-way bearing, and the access shaft drives the movable core block to rotate in one direction; the centrifugal block is positioned on the movable core block, and the friction block is locked at the outer edge of the centrifugal block and can abut against the inner surface of the shell to form friction; the method is characterized in that: more than two centrifugal blocks are positioned on the movable core block through the front fixing piece and the rear fixing piece, can do radial movement relative to the movable core block, and are kept in radial contraction trend by the springs.
2. A drop protector speed limiting device as defined in claim 1, wherein: the centrifugal block is divided into two blocks which are symmetrically distributed on the outer side of the movable core block, the two ends of the centrifugal block are provided with slotted holes or long slotted holes which are parallel to each other, the centrifugal block is positioned on the movable core block by the aid of the front fixing piece and the rear fixing piece and the bolt pin, the movable core block drives the centrifugal block to rotate, and the centrifugal block can be radially opened under the action of centrifugal force; the spring for driving the contraction action is a tension spring which is arranged between two ends of the two centrifugal blocks to form a counter-pulling trend for overcoming the centrifugal force.
3. A drop protector speed limiting device as defined in claim 1, wherein: the centrifugal blocks are more than three and are rotationally and symmetrically distributed on the outer side of the movable core block, each centrifugal block is provided with a radial long slotted hole, the centrifugal blocks are positioned on the movable core block by virtue of the front fixing piece and the rear fixing piece and the bolt pin, the movable core block drives the centrifugal blocks to rotate, and the centrifugal blocks can radially open under the action of centrifugal force; the spring of drive shrink action is the extension spring, and the extension spring sets up to as an alternative structure as follows: firstly, two ends of a tension spring are respectively suspended between the end faces of adjacent centrifugal blocks; and two ends of the tension spring are respectively suspended between the centrifugal block and the movable core block.
4. A fall protector speed limiting device according to claim 1, 2 or 3, wherein: the circumference of the movable core block is also provided with a radial pin rod, and the end part of the radial pin rod can be abutted against the inner cambered surface of the centrifugal block.
5. A fall protector speed limiting device according to claim 1, 2 or 3, wherein: the movable core block is arranged on the circumference of one side sleeved with the one-way bearing and is also provided with one-way teeth; a key groove radially penetrates through the access shaft covered by the one-way teeth, and a sliding key is arranged in the key groove and can be hung on the one-way teeth in the clamping direction of the one-way bearing.
6. A drop protector speed limiting device as defined in claim 5, wherein: the sliding key is of a rectangular structure, and the rear edge angle corresponding to the blocking direction is rounded.
7. A fall protector speed limiting device according to claim 1, 2 or 3, wherein: the movable core block is provided with a one-way groove on the circumference of one side sleeved with the one-way bearing, a roll shaft is arranged between the access shafts covered by the one-way groove, and the roll shaft is positioned in the blocking direction of the one-way bearing and can enter the one-way groove to be blocked between the access shafts and the movable core block.
8. A drop protector speed limiting device as defined in claim 1, wherein: a friction ring is embedded in the shell and is contacted with the friction block by virtue of the friction ring.
9. A fall protector speed limiting device according to claim 1, 2 or 3, wherein: the front and rear fixing pieces are correspondingly embedded at the front and rear ends of the movable core block; the front and rear fixing pieces are also attached to the front and rear end faces of the centrifugal block and are positioned together through bolt pins.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020141898.5U CN211550341U (en) | 2020-01-22 | 2020-01-22 | Speed limiting device of descending protector |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020141898.5U CN211550341U (en) | 2020-01-22 | 2020-01-22 | Speed limiting device of descending protector |
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|---|---|
| CN211550341U true CN211550341U (en) | 2020-09-22 |
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| CN202020141898.5U Active CN211550341U (en) | 2020-01-22 | 2020-01-22 | Speed limiting device of descending protector |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113153939A (en) * | 2020-01-22 | 2021-07-23 | 福建省东山县辉永泰体育用品实业有限公司 | Speed limiting device of descending protector |
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2020
- 2020-01-22 CN CN202020141898.5U patent/CN211550341U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113153939A (en) * | 2020-01-22 | 2021-07-23 | 福建省东山县辉永泰体育用品实业有限公司 | Speed limiting device of descending protector |
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