CN114955784A - One-way safety tongs - Google Patents
One-way safety tongs Download PDFInfo
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- CN114955784A CN114955784A CN202110216797.9A CN202110216797A CN114955784A CN 114955784 A CN114955784 A CN 114955784A CN 202110216797 A CN202110216797 A CN 202110216797A CN 114955784 A CN114955784 A CN 114955784A
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- wedge block
- elastic rod
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- way safety
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- 230000000149 penetrating effect Effects 0.000 claims description 2
- 230000004044 response Effects 0.000 abstract description 3
- 230000008859 change Effects 0.000 description 7
- 238000005299 abrasion Methods 0.000 description 5
- 238000007906 compression Methods 0.000 description 4
- 238000009434 installation Methods 0.000 description 4
- 230000003068 static effect Effects 0.000 description 4
- 230000006835 compression Effects 0.000 description 3
- 238000005096 rolling process Methods 0.000 description 3
- 210000000080 chela (arthropods) Anatomy 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000007704 transition Effects 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
- B66B5/00—Applications of checking, fault-correcting, or safety devices in elevators
- B66B5/02—Applications of checking, fault-correcting, or safety devices in elevators responsive to abnormal operating conditions
- B66B5/16—Braking or catch devices operating between cars, cages, or skips and fixed guide elements or surfaces in hoistway or well
- B66B5/18—Braking or catch devices operating between cars, cages, or skips and fixed guide elements or surfaces in hoistway or well and applying frictional retarding forces
- B66B5/22—Braking or catch devices operating between cars, cages, or skips and fixed guide elements or surfaces in hoistway or well and applying frictional retarding forces by means of linearly-movable wedges
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Maintenance And Inspection Apparatuses For Elevators (AREA)
Abstract
The invention belongs to the technical field of safety tongs for elevators, and particularly relates to a one-way safety tong which comprises a tong body, wherein the tong body is provided with a longitudinally-through guide rail channel; the clamp body is provided with wedge block mounting concave parts respectively positioned at two sides of the guide rail channel so as to be respectively used for mounting a left wedge block and a right wedge block; the left wedge block and the right wedge block are movably matched with the clamp body, the one-way safety clamp further comprises an elastic rod, the elastic rod extends longitudinally, the top end of the elastic rod abuts against the clamp body, and the bottom end of the elastic rod abuts against the left wedge block; when the right wedge block is lifted to the target position, the linkage left wedge block is in contact friction with the elevator guide rail, so that the linkage elastic rod deforms to generate component force towards the elevator guide rail for the left wedge block. The safety tongs adopt the elastic rod, and compared with the existing disc spring, the safety tongs have faster response under the action of external force, and reduce the stroke to ensure that the safety braking is instantaneously decelerated.
Description
Technical Field
The invention belongs to the technical field of safety tongs for an elevator, and particularly relates to a one-way safety tong.
Background
When the elevator falls abnormally, in order to protect the safety of people taking the elevator in the elevator car as much as possible, safety tongs are required to be arranged on the elevator car, when the elevator car is in a normal running state, under the action of self weight, the two wedge blocks are positioned at the lowest part, and a certain distance is kept between the clamping surface of the two wedge blocks and the elevator guide rail; when the elevator is in an abnormal state, the car quickly drops and the speed reaches the action speed set by the speed limiter, the speed limiter acts immediately, and the car stops moving by lifting the wedge blocks upwards until the clamping surfaces of the two wedge blocks are contacted with the elevator guide rail until the two wedge blocks firmly clamp the elevator guide rail, so that the safety of people taking the elevator in the car is ensured.
For example, patent document CA1298214C discloses a safety gear structure. During braking, a quick response is required for the wedge to obtain stable braking performance. In the safety tongs disclosed in the above patent document, a pressure spring is provided between the housing and the upper end of the wedge, the pressure spring pushing the wedge obliquely downward, the pressure spring being fixed in place by a fixing bolt fixed in the wedge but movable relative to the housing through an opening of the housing, the diameter of the opening being larger than the diameter of the fixing bolt; in addition, the surface of the housing on which the compression spring acts is inclined so that the spring force acting on the wedge is parallel to the guide surface of the wedge.
The compression spring as the elastic element is mostly formed by connecting a plurality of disc springs in series, and the internal resistance or the response in the compression process and the braking force cannot respond quickly, so that the stability in the braking process is reduced. Moreover, the height of the disc springs after being connected in series is higher, so that the structural size of the safety gear is larger, and the installation space is influenced.
In addition, the conventional safety tongs for friction braking by wedge blocks obtain different positive pressures by controlling the compression amount of the elastic element by limiting the vertical stroke of the wedge block to obtain a certain braking force. And setting positive pressure for delivery when delivery debugging meets certain P + Q weight and guide rail structure size and state. However, as the wedges and the elevator guide rails wear during braking, the distance between the wedges increases and the positive pressure of the elastic element decreases, with the result that there is a certain risk of the braking life and reliability of the braking device. In order to solve the abrasion problem in the braking process, the limit amount needs to be adjusted through abrasion detection, and the positive pressure of the elastic element is controlled by changing the limit after abrasion.
Furthermore, the existing wedge blocks have instability in static or low-speed braking under full load and light load. When in light-load static braking, the positive pressure is relatively small, and because the friction of a large-area wedge block is unstable, the relative slippage is generated when different elevator guide rails are braked, so that the static braking is invalid.
Disclosure of Invention
Based on the above-mentioned drawbacks and deficiencies of the prior art, it is an object of the present invention to at least solve one or more of the above-mentioned problems of the prior art, in other words to provide a one-way safety gear that meets one or more of the above-mentioned needs.
In order to achieve the purpose, the invention adopts the following technical scheme:
a unidirectional safety gear comprises a gear body, a gear body and a gear rack, wherein the gear body is provided with a guide rail channel which is longitudinally penetrated through and is used for penetrating an elevator guide rail; the clamp body is provided with wedge block mounting concave parts respectively positioned at two sides of the guide rail channel so as to be respectively used for mounting a left wedge block and a right wedge block; the left wedge block and the right wedge block are movably matched with the clamp body, the one-way safety clamp further comprises an elastic rod, the elastic rod extends longitudinally, the top end of the elastic rod abuts against the clamp body, and the bottom end of the elastic rod abuts against the left wedge block; when the right wedge block is lifted to the target position, the linkage left wedge block is in contact friction with the elevator guide rail, so that the linkage elastic rod deforms to generate component force towards the elevator guide rail for the left wedge block.
As a preferred scheme, the top of the right wedge block is provided with a compensation block arranged on the caliper body, and the compensation block is movably matched with the caliper body to be close to or far away from the elevator guide rail; when the right wedge block is lifted to a corresponding position, the right wedge block is linked with the compensation block to be in contact friction with the elevator guide rail.
Preferably, the caliper body has a guide structure for guiding the compensating block closer to or farther from the elevator guide rail.
Preferably, a sliding positioning structure is arranged between the clamp body and the right wedge block corresponding to the compensation block, so that the compensation block moves along the direction vertical to the braking surface of the elevator guide rail under the action of the right wedge block and contacts the elevator guide rail.
As a preferred scheme, the compensation block is limited by a right wedge block cover plate arranged on the caliper body; wherein, right wedge apron and slide positioning structure are located the both sides of compensation piece respectively.
Preferably, the sliding positioning structure comprises a sliding groove located in the caliper body and a positioning part installed on the compensation block, the positioning part extends into the sliding groove, and the positioning part is in sliding fit with the sliding groove;
or the sliding positioning structure comprises a positioning part arranged on the clamp body and a sliding groove positioned on the compensation block, the positioning part extends into the sliding groove, and the sliding groove is in sliding fit with the positioning part.
Preferably, the vertical distance between the top end of the elastic rod and the braking surface of the left wedge block is larger than the vertical distance between the bottom end of the elastic rod and the braking surface of the left wedge block.
Preferably, the bottom end of the elastic rod extends to a predetermined depth inside the left wedge.
Preferably, elastic rods are respectively arranged on two sides of the left wedge block.
Preferably, the top end of the elastic rod is provided with a pressure bearing seat, and the pressure bearing seat, the elastic rod and the left wedge block form an integrated linkage structure; the pressure bearing seat is in surface contact fit with the pliers body.
Compared with the prior art, the invention has the beneficial effects that:
(1) when the left wedge block is in contact friction with the elevator guide rail, the linkage elastic rod deforms, so that component force towards the elevator guide rail is generated on the left wedge block, the stability of braking force is improved, and the safety of unidirectional braking is higher; the elastic rod responds faster under the action of external force relative to the existing disc spring, and the stroke is reduced, so that the safety brake is decelerated instantly;
(2) the occupied space of the elastic rod is smaller than that of the disc spring, the problem that the installation space is influenced due to the fact that the structure size is larger due to the increase of the height of the disc spring is solved, and the miniaturization of the safety protection device is facilitated; after the disc spring is replaced, the defect of unstable force value caused by internal resistance of the disc spring is overcome; a plurality of disc springs are not required to be installed, so that the installation is more convenient;
(3) the elastic rod can extend into the left wedge block or be arranged on two sides of the left wedge block, so that the space is saved, and the reduction of the structural size of the unidirectional safety gear is facilitated;
(4) the pressure bearing seat, the elastic rod and the left wedge block form an integrated linkage structure, so that the force application angle of the elastic rod is ensured;
(5) based on the defect that the braking force is reduced due to abrasion of the wedge block and the elevator guide rail, the compensation block is in contact friction compensation with the elevator guide rail, and a static small contact surface is used for obtaining larger friction force, so that the braking safety of the one-way safety tongs is improved, and effective safety protection under various working conditions is realized.
Drawings
FIG. 1 is a schematic structural view of a one-way safety gear of embodiment 1 of the present invention (the wedge cover plates on both sides are omitted);
FIG. 2 is a schematic structural view of a left wedge block according to embodiment 1 of the present invention;
FIG. 3 is a schematic structural view of an elastic rod of embodiment 1 of the present invention;
fig. 4 is a schematic structural view of a seat body of a pressure bearing seat according to embodiment 1 of the present invention;
fig. 5 is a schematic structural view of a limiting plate of a pressure bearing seat according to embodiment 1 of the present invention;
fig. 6 is a schematic structural view of an integrated linkage structure composed of a bearing seat, an elastic rod and a left wedge in embodiment 1 of the present invention;
fig. 7 is a schematic structural view of a one-way safety gear of embodiment 1 of the invention;
FIG. 8 is a schematic structural view of a one-way safety gear of embodiment 7 of the present invention (the wedge cover plates on both sides are omitted);
fig. 9 is a schematic structural view of a clamp body of the one-way safety clamp according to embodiment 7 of the invention;
FIG. 10 is a schematic view showing the mounting structure of a compensating block and a positioning pin according to embodiment 7 of the present invention;
fig. 11 is a schematic structural view of the one-way safety gear of embodiment 7 of the invention.
Detailed Description
In order to more clearly illustrate the embodiments of the present invention, the following description will explain the embodiments of the present invention with reference to the accompanying drawings. It is obvious that the drawings in the following description are only some examples of the invention, and that for a person skilled in the art, other drawings and embodiments can be derived from them without inventive effort.
Example 1:
as shown in fig. 1-7, the one-way safety tongs of the present embodiment comprises a tong body 1, a left wedge block 2-1 and a right wedge block 2-2, wherein a guide rail channel with a U-shaped cross section is longitudinally formed in the middle of the tong body 1, and the guide rail channel penetrates through the top surface and the bottom surface of the tong body and is used for installing an elevator guide rail; the two sides of the guide rail channel on the caliper body 1 are respectively provided with two wedge block mounting concave parts, the two wedge block mounting concave parts are parallel, the bottom of the left wedge block 2-1 mounting concave part is more adjacent to the channel relative to the top, and the bottom of the right wedge block 2-2 mounting concave part is more far away from the channel relative to the top. Wherein, the right wedge block 2-2 is connected with a pulling mechanism so as to carry out pulling braking. When the right wedge block is lifted to the target position, the braking surfaces of the two wedge blocks rub with the elevator guide rail to realize braking.
The one-way safety tongs of the embodiment further comprise an elastic rod 3, wherein the elastic rod 3 extends along the lifting direction of the wedge block (namely, extends vertically), the top end of the elastic rod 3 abuts against the transition section between the mounting concave part of the left wedge block 2-1 and the top part of the tong body, and the bottom end of the elastic rod 3 abuts against the left wedge block 2-1; wherein, as shown in fig. 2, the top of the left wedge block 2-1 is provided with a deep groove 2a extending along the inside thereof, and the bottom end of the elastic rod 3 extends into the deep groove 2 a; as shown in fig. 3, the bottom end of the elastic rod 3 is provided with an anti-falling hole 3a, and the elastic rod and the left wedge block 2-1 are supported against the anti-falling hole through a bolt to realize anti-falling installation, so that part of the length of the elastic rod 3 is arranged in the elastic rod, the size reduction of the unidirectional safety gear can be realized, and the linkage of the elastic rod 3 and the left wedge block 2-1 is realized. In addition, the vertical distance between the top end of the elastic rod 3 and the braking surface of the left wedge block 2-1 is larger than the vertical distance between the bottom end of the elastic rod 3 and the braking surface of the left wedge block 2-1, and the change from the vertical distance between the top end of the elastic rod 3 and the braking surface of the left wedge block 2-1 to the vertical distance between the bottom end of the elastic rod 3 and the braking surface of the left wedge block 2-1 is arc-shaped change, namely the elastic rod 3 is of an arc-shaped bent rod structure. By the design, when the left wedge block 2-1 is lifted to a target position after being in contact friction with the elevator guide rail, the left wedge block 2-1 is linked with the elastic rod 3 to deform so as to generate component force towards the elevator guide rail to the left wedge block 2-1, so that the stability of braking force is improved, and the braking safety is higher.
In addition, the top end of the elastic rod 3 is provided with a bearing seat 4, and the bearing seat 4 is positioned below a transition section between the mounting concave part of the left wedge block 2-1 of the clamp body and the top of the clamp body; specifically, as shown in fig. 1, 4 and 5, the pressure-bearing seat 4 includes a seat body located at the upper side and a limit plate 40 attached to the lower side of the seat body and fixedly installed, the seat body has a limit groove 4a, and the limit groove 4a is matched with the structure of the spherical top end of the elastic rod 3; in addition, the lower side of the spherical top end of the elastic rod 3 is provided with a clamping groove 3b (as shown in fig. 3), the clamping position of the limiting plate 40 is matched with the clamping groove of the elastic rod in a clamping manner, and the limiting plate is fixedly arranged on the bearing seat body, so that the bearing seat 4 is linked with the elastic rod 3, and the stability of braking force generated by the deformation of the elastic rod is ensured. As shown in fig. 6, the pressure-bearing seat 4, the elastic rod 3 and the left wedge 2-1 form an integrated linkage structure, that is, the three move along with the movement of the left wedge, and the pressure-bearing seat 4 and the caliper body 1 are in surface contact fit, so as to prevent the top end of the elastic rod 3 from moving under the action of external force and ensure the force application angle of the elastic rod 3.
Example 2:
the one-way safety gear of the present embodiment is different from embodiment 1 in that:
the change from the vertical distance between the top end of the elastic rod and the braking surface of the left wedge block to the vertical distance between the bottom end of the elastic rod and the braking surface of the left wedge block is linear, namely the elastic rod is of an inclined rod structure, the left wedge block can generate component force towards the elevator guide rail, the structure diversification is realized, and the requirements of different application occasions are met.
Other structures can refer to embodiment 1.
Example 3:
the one-way safety gear of the present embodiment is different from embodiment 1 in that:
the change from the perpendicular distance from the top end of the elastic rod to the perpendicular distance from the bottom end of the elastic rod to the braking surface of the left wedge is linear change + nonlinear change, for example: the upper half section of the elastic rod is a linear change section, the lower half section of the elastic rod is an arc section, component force towards the elevator guide rail can be generated on the left wedge block, structure diversification is achieved, and requirements of different application occasions are met.
Other structures can refer to embodiment 1.
Example 4:
the one-way safety gear of the present embodiment is different from embodiment 1 in that:
the elastic rod can not be fixedly installed with the left wedge block, namely the elastic rod is inserted into a deep groove of the left wedge block, and the elastic rod is not separated from the left wedge block or fixed with the bearing seat in the moving stroke of the left wedge block, so that structural diversification is realized, and the requirements of different application occasions are met.
Other structures can refer to embodiment 1.
Example 5:
the one-way safety gear of the present embodiment is different from embodiment 1 in that:
the elastic rods are arranged in different mounting modes and different in number, the elastic rods can be respectively arranged on the front side and the rear side of the left wedge block, namely, lugs or mounting grooves are formed in the front side and the rear side of the left wedge block in a distributed mode, the elastic rods abut against the corresponding lugs or are embedded into the corresponding mounting grooves, the force component towards the elevator guide rail can be generated on the left wedge block, structure diversification is achieved, and the requirements of different application occasions are met.
Other structures can refer to embodiment 1.
Example 6:
the one-way safety gear of the present embodiment is different from embodiment 1 in that:
the clamp has the advantages that the arrangement of the bearing seat is omitted, a clamping groove can be directly designed at the corresponding position of the clamp body corresponding to the top end of the elastic rod when the clamp body is formed, the top end of the elastic rod is in clamping fit with the clamping groove, and the stability of braking force generated by deformation of the elastic rod can be guaranteed. The structure diversification is realized, and the requirements of different application occasions are met.
Other structures can refer to embodiment 1.
Example 7:
the one-way safety gear of the present embodiment is different from embodiment 1 in that: on the basis of the one-way safety gear of example 1, the following wedge wear compensation improvements were made:
as shown in fig. 8, the one-way safety gear of the present embodiment further comprises a compensation block 5, and accordingly, the right side of the channel of the gear body 1 is provided with a mounting concave part of the compensation block 5, and the compensation block 5 is located at one side of the pulling direction of the right wedge block 2-2, namely, above the right wedge block 2-2; the compensating block 5 is movably fitted to the caliper body 1 to be close to or far from the elevator guide rail. When the right wedge block 2-2 is pulled to a corresponding position, the right wedge block 2-2 is linked with the compensation block 5 to be in contact friction with the elevator guide rail, and self-compensation of wedge block abrasion is achieved.
Specifically, as shown in fig. 9, the top of the mounting recess of the compensating block 5 has a guide structure 6 for guiding the compensating block 5 closer to or farther from the elevator guide rail; the guide structure 6 is an inclined plane and is matched with the top surface of the compensation block 5; when the compensation block is lifted by the right wedge block in a linkage manner, the compensation block moves in a direction close to the elevator guide rail until the compensation block moves to be in contact with the elevator guide rail and is subjected to friction braking.
As shown in fig. 9-11, the caliper body 1 is installed and matched with the compensation block 5 through a sliding positioning structure, and the compensation block 5 is positioned through a wedge cover plate 7 installed on the caliper body 1; the wedge block cover plate 7 and the sliding positioning structure are respectively positioned at the front side and the rear side of the compensation block 5; the sliding positioning structure comprises a chute 1a positioned on the caliper body and a positioning part 8 arranged on the compensation block 5, the positioning part 8 extends into the chute 1a, and the positioning part 8 is in sliding fit with the chute 1a, so that the sliding positioning structure of the embodiment can realize the positioning of the compensation block 5 and the guiding of the compensation block 5. When the right wedge block 2-2 is linked with the compensation block 5 to ascend, the compensation block 5 moves to be in contact friction with the elevator guide rail along the direction close to the elevator guide rail so as to realize safe braking.
Wherein, the sliding chutes 1a are provided with 2 sliding chutes which are parallel to each other; correspondingly, the positioning parts 8 are matched with the sliding chutes 1a in a one-to-one correspondence manner, and the positioning parts 8 are preferably positioning pins and can also be components such as screws and the like. In addition, the contact surface between the top surface of the compensation block 5 and the top surface of the wedge block is an inclined surface (or a plane), so that the contact area is increased, and the linkage stability of the two is improved.
Example 8:
the one-way safety gear of this embodiment differs from embodiment 7 in that:
the relative position interchange of locating pin and spout that the slide positioning structure includes, the locating pin is installed on the pincers body promptly, and the spout is seted up on the compensation piece, also can realize the location of compensation piece for the structure is diversified, satisfies the demand of different application occasions.
For other structures, reference may be made to embodiments 1 and 7.
Example 9:
the one-way safety gear of this embodiment differs from embodiment 7 in that:
the number of the parallel chutes is not limited to two, and can be one, three and the like, and the chutes are specifically arranged according to actual requirements, so that structural diversification is realized, and the requirements of different application occasions are met.
For other structures, reference may be made to embodiments 1 and 7.
Example 10:
the one-way safety gear of this embodiment differs from embodiment 7 in that:
the guide structure that the compensation piece corresponds still can be for the curved surface and the rolling member that sets up wherein to can realize the direction of compensation piece, so that the compensation piece is close to or keeps away from elevator guide rail, specifically sets up according to actual demand, realizes that the structure is diversified, satisfies different application occasion's demand.
For other structures, reference may be made to embodiments 1 and 7.
Example 11:
the one-way safety gear of this embodiment differs from embodiment 7 in that:
the contact surface between the compensation block and the wedge block corresponding to the compensation block can also be a curved surface, correspondingly, a rolling body is arranged between the compensation block and the wedge block, the rolling body is specifically arranged according to actual requirements, structural diversification is realized, and the requirements of different application occasions are met.
For other structures, reference may be made to embodiments 1 and 7.
Example 12:
the one-way safety gear of this embodiment differs from embodiment 7 in that:
the setting element still can be the spin, and the both sides of spin imbed the spout of the pincers body respectively and compensate the spout of piece to can realize slide positioning's effect, specifically set up according to actual demand, realize that the structure is diversified, satisfy the demand of different application occasions.
For other structures, reference may be made to embodiments 1 and 7.
Example 13:
the one-way safety gear of this embodiment differs from embodiment 7 in that:
the compensation surface of the compensation block can also be an arc surface or a plane or an arc surface with grains and the like, and is specifically arranged according to actual requirements, so that structural diversification is realized, and the requirements of different application occasions are met.
For other structures, reference may be made to embodiments 1 and 7.
The foregoing has outlined rather broadly the preferred embodiments and principles of the present invention and it will be appreciated that those skilled in the art may devise variations of the present invention that are within the spirit and scope of the appended claims.
Claims (10)
1. A unidirectional safety gear comprises a gear body, a gear body and a gear rack, wherein the gear body is provided with a guide rail channel which is longitudinally penetrated through and is used for penetrating an elevator guide rail; the clamp body is provided with wedge block mounting concave parts respectively positioned at two sides of the guide rail channel so as to be respectively used for mounting a left wedge block and a right wedge block; the one-way safety tongs are characterized in that the one-way safety tongs also comprise an elastic rod, the elastic rod extends longitudinally, the top end of the elastic rod abuts against the tongs body, and the bottom end of the elastic rod abuts against the left wedge block; when the right wedge block is lifted to the target position, the linkage left wedge block is in contact friction with the elevator guide rail, so that the linkage elastic rod deforms to generate component force towards the elevator guide rail for the left wedge block.
2. A one-way safety gear according to claim 1, wherein the top of the right wedge block is provided with a compensation block mounted on the gear body, and the compensation block is movably matched with the gear body to be close to or far away from the elevator guide rail; when the right wedge block is lifted to a corresponding position, the right wedge block is linked with the compensation block to be in contact friction with the elevator guide rail.
3. A one-way safety gear according to claim 2, wherein the gear body has a guide structure for guiding the compensating block closer to or further away from the elevator guide rail.
4. A one-way safety gear according to claim 2 or 3, wherein a sliding positioning structure is arranged between the gear body and the right wedge block corresponding to the compensating block, so that the compensating block moves along the direction vertical to the braking surface of the elevator guide rail under the action of the right wedge block and contacts the elevator guide rail.
5. A one-way safety gear according to claim 4, wherein the compensation block is further limited by a right wedge cover plate mounted on the gear body; wherein, right wedge apron and slide positioning structure are located the both sides of compensation piece respectively.
6. A one-way safety gear according to claim 4, wherein the sliding positioning structure comprises a sliding groove in the gear body and a positioning member mounted on the compensation block, the positioning member extends into the sliding groove, and the positioning member is slidably fitted in the sliding groove;
or the sliding positioning structure comprises a positioning part arranged on the clamp body and a sliding groove positioned on the compensation block, the positioning part extends into the sliding groove, and the sliding groove is in sliding fit with the positioning part.
7. A one-way safety gear according to claim 1, wherein the vertical distance between the top end of the resilient lever and the braking surface of the left chock is greater than the vertical distance between the bottom end of the resilient lever and the braking surface of the left chock.
8. A one-way safety gear according to claim 1, wherein the bottom end of the resilient bar extends to a predetermined depth inside the left wedge.
9. A one-way safety gear according to claim 1, wherein elastic rods are respectively arranged on two sides of the left wedge block.
10. A one-way safety gear according to claim 1, wherein a pressure-bearing seat is mounted at the top end of the elastic rod, and the pressure-bearing seat, the elastic rod and the left wedge block form an integrated linkage structure; the pressure bearing seat is in surface contact fit with the pliers body.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110216797.9A CN114955784B (en) | 2021-02-26 | 2021-02-26 | Unidirectional safety tongs |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110216797.9A CN114955784B (en) | 2021-02-26 | 2021-02-26 | Unidirectional safety tongs |
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| CN114955784A true CN114955784A (en) | 2022-08-30 |
| CN114955784B CN114955784B (en) | 2024-05-07 |
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| CN214652835U (en) * | 2021-02-26 | 2021-11-09 | 杭州沪宁电梯部件股份有限公司 | One-way safety tongs |
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2021
- 2021-02-26 CN CN202110216797.9A patent/CN114955784B/en active Active
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| CN2685301Y (en) * | 2004-03-17 | 2005-03-16 | 上海精润金属制品有限公司 | Elevator safety tongs |
| US20170066628A1 (en) * | 2015-09-08 | 2017-03-09 | Otis Elevator Company | Safety device for elevators |
| CN206606884U (en) * | 2016-08-20 | 2017-11-03 | 丹阳市华发环保机械有限公司 | A kind of elevator of use one-way safety pincers |
| CN207932826U (en) * | 2016-08-22 | 2018-10-02 | 泊头市恒发机械制造有限公司 | Using the elevator of unidirectional progressive safety gear |
| WO2019029314A1 (en) * | 2017-08-08 | 2019-02-14 | 无锡市一品电梯配件有限公司 | Safety gear with constant brake deceleration |
| CN212222084U (en) * | 2020-06-03 | 2020-12-25 | 苏州东方富力电梯部件有限公司 | Safety tongs for elevator |
| CN214652835U (en) * | 2021-02-26 | 2021-11-09 | 杭州沪宁电梯部件股份有限公司 | One-way safety tongs |
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| CN114955784B (en) | 2024-05-07 |
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