CN111891965A - Self-locking jack for steel support movable head - Google Patents
Self-locking jack for steel support movable head Download PDFInfo
- Publication number
- CN111891965A CN111891965A CN202010744975.0A CN202010744975A CN111891965A CN 111891965 A CN111891965 A CN 111891965A CN 202010744975 A CN202010744975 A CN 202010744975A CN 111891965 A CN111891965 A CN 111891965A
- Authority
- CN
- China
- Prior art keywords
- locking
- jack
- self
- steel support
- push
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66F—HOISTING, LIFTING, HAULING OR PUSHING, NOT OTHERWISE PROVIDED FOR, e.g. DEVICES WHICH APPLY A LIFTING OR PUSHING FORCE DIRECTLY TO THE SURFACE OF A LOAD
- B66F3/00—Devices, e.g. jacks, adapted for uninterrupted lifting of loads
- B66F3/24—Devices, e.g. jacks, adapted for uninterrupted lifting of loads fluid-pressure operated
- B66F3/25—Constructional features
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66F—HOISTING, LIFTING, HAULING OR PUSHING, NOT OTHERWISE PROVIDED FOR, e.g. DEVICES WHICH APPLY A LIFTING OR PUSHING FORCE DIRECTLY TO THE SURFACE OF A LOAD
- B66F3/00—Devices, e.g. jacks, adapted for uninterrupted lifting of loads
- B66F3/24—Devices, e.g. jacks, adapted for uninterrupted lifting of loads fluid-pressure operated
- B66F3/25—Constructional features
- B66F3/30—Constructional features with positive brakes or locks
Abstract
The invention discloses a self-locking jack for a steel support piston head, which belongs to the technical field of machinery and comprises a jack body, a push body and at least one locking structure, wherein the push body is arranged on an output shaft of the jack body, the locking structure is matched with the push body, the push body is of a cylindrical structure, the locking structure comprises two split locking blocks arranged on the outer circumference of the push body and a driving piece used for driving the locking blocks to move back and forth along the radius direction of the push body, a plurality of locking teeth are arranged on the abutting surfaces of the locking blocks and the push body, and a plurality of locking grooves matched with the locking teeth are arranged on the outer wall of the push body. Aiming at the technical problems that a jack in the prior art is large in size and needs to be manually locked, the invention provides a self-locking jack for a steel support swivel joint, which can realize automatic locking and has the advantages of simple structure, small size, light weight, convenience in mounting and dismounting and convenience in later-stage maintenance.
Description
Technical Field
The invention relates to the technical field of machinery, in particular to a self-locking jack for a steel support movable head.
Background
The steel support road-moving head of the traditional open cut foundation pit is shown in figure 1, a common jack is placed in a single cavity, positioning seats are arranged on two sides of the single cavity and used as a jack to be lifted in place and then locked through a mechanical locking device, the mechanical locking device is a steel wedge block and is operated manually, and particularly, the steel wedge block cannot be removed by workers in a deep foundation pit with the depth of tens of meters, so that the operation is unsafe, and great potential safety hazards exist.
Disclosure of Invention
1. Technical problem to be solved by the invention
Aiming at the technical problems that a jack in the prior art is large in size and needs to be manually locked, the invention provides a self-locking jack for a steel support swivel joint, which can realize automatic locking and has the advantages of simple structure, small size, light weight, convenience in mounting and dismounting and convenience in later-stage maintenance.
2. Technical scheme
In order to solve the problems, the technical scheme provided by the invention is as follows:
the utility model provides a from locking-type jack for steel shotcrete head, includes the jack body, locates the jack body on the jack body output shaft to and at least one and push away body matched with locking structure, it is cylindrical structure to push away the body, the locking structure is including locating two on pushing away the body outer circumference to open locking piece and be used for driving the driving piece that the locking piece made a round trip to move along pushing away body radius direction, be equipped with a plurality of locking teeth on the locking piece and the butt face of pushing away the body, be equipped with a plurality of and locking tooth matched with locking grooves on the pushing away body outer wall.
Optionally, the locking groove includes a first locking surface and a first sliding surface, the first sliding surface is disposed on one side close to the jack body, the first locking surface is disposed on one side far away from the jack body, and the locking teeth are provided with a second locking surface in abutting fit with the first locking surface and a second sliding surface in sliding fit with the first sliding surface.
Optionally, the pushing device further comprises an elastic piece for driving the locking block to move towards the radius direction of the pushing body.
Optionally, the elastic member is sleeved on the output shaft of the driving member, one end of the elastic member is connected to the driving member, and the other end of the elastic member is connected to the locking block.
Optionally, the locking block is provided with a mounting groove for embedding the end of the elastic member.
Optionally, the outer end of the pushing body is connected with a top cover through a screw.
Optionally, the drive member is a hydraulic ram.
Optionally, a support body is arranged outside the pushing body, one end of the support body is fixedly connected to the oil cylinder of the jack body, and the other end of the support body abuts against the locking block.
3. Advantageous effects
Compared with the prior art, the technical scheme provided by the invention has the following beneficial effects:
(1) the locking teeth are embedded into the locking grooves under the action of the driving piece, so that the purpose of locking the pushing body can be achieved, and the locking teeth can be matched with the locking grooves at any positions to achieve stepless locking of the pushing body;
(2) the locking structure is simple, the volume is small, the weight is light, the installation and the disassembly are convenient, and the later maintenance is convenient;
(3) the first locking surface and the second locking surface are abutted to achieve a locking effect, and the first locking surface is arranged on one side far away from the jack body, so that when the locking teeth are embedded into the locking grooves, the first locking surface and the second locking surface are abutted to limit the pushing body to move inwards relative to the locking block, and a good supporting effect can be achieved when the pushing body receives large pressure;
(4) the locking block is of a split structure, so that the locking teeth can be arranged into a longer size along the inner wall of the locking block, and a more stable locking effect is achieved when the locking teeth are matched with the locking grooves;
(5) by adopting the arrangement of the first sliding surface and the second sliding surface, when the driving piece stops, the pushing body can move outwards under the driving of the jack body, and the first sliding surface and the second sliding surface can slide without influencing the movement of the pushing body, so that the locking purpose of the locking block can be realized in a smaller moving range, and the space occupancy rate of the locking structure is greatly reduced;
drawings
Fig. 1 is a schematic structural view of a steel support movable road head of a traditional open cut foundation pit;
FIG. 2 is a schematic cross-sectional view of an embodiment of the present invention;
FIG. 3 is an enlarged view of a portion of FIG. 2 at A;
FIG. 4 is a cross-sectional view of a locking block in accordance with an embodiment of the present invention.
1. A jack body; 2. a pushing body; 21. a locking groove; 211. a first locking surface; 212. a first sliding surface; 3. a locking block; 31. a locking tooth; 311. a second locking surface; 312. a second sliding surface; 32. mounting grooves; 4. a drive member; 5. an elastic member; 6. a screw; 7. a top cover; 8. and a support body.
Detailed Description
For a further understanding of the present invention, reference is made to the following detailed description taken in conjunction with the accompanying drawings 1-4 and examples.
With reference to fig. 2-4, the self-locking jack for a steel support swivel joint of this embodiment includes a jack body 1, a pushing body 2 welded and fixedly connected to an output shaft of the jack body 1, and at least one locking structure engaged with the pushing body 2, wherein the pushing body 2 is a cylindrical structure, the locking structure includes a split locking block 3 disposed on an outer circumference of the pushing body 2 and a driving member 4 for driving the locking block 3 to move back and forth along a radius direction of the pushing body 2, a plurality of locking teeth 31 are disposed on abutting surfaces of the locking block 3 and the pushing body 2, a plurality of locking grooves 21 engaged with the locking teeth 31 are disposed on an outer wall of the pushing body 2, and the locking grooves 21 are uniformly distributed along a moving direction of the pushing body 2; when the locking teeth 31 are embedded into the locking grooves 21 under the action of the driving member 4, the purpose of locking the pushing body 2 can be achieved, and the locking teeth 31 can be matched with the locking grooves 21 at any positions to achieve stepless locking of the pushing body 2.
In this embodiment, the driving member 4 is a hydraulic cylinder, which can be purchased directly from the market, and therefore is not described herein, when the self-locking jack is installed in the steel support release head, the driving member 4 is installed on the inner wall of the steel support release head, and the output shaft of the driving member 4 faces the side surface of the jack body 1 vertically.
In this embodiment, the locking block 3 is a semicircular structure with a radius consistent with that of the pushing body 2; when the locking structure realizes the locking to the pushing body 2, 3 tip butts of locking piece of both sides and forms a ring form that encircles in pushing body 2 together, and locking piece 3 sets to semicircular structure for locking tooth 31 on the locking piece 3 can be followed the circumferencial direction extension of locking piece 3 as far as, thereby makes to have bigger area of contact between locking tooth 31 and the locking groove 32, and stability when realizing the locking obtains guaranteeing.
In this embodiment, the locking groove 21 includes a first locking surface 211 and a first sliding surface 212, the first sliding surface 212 is disposed on a side close to the jack body 1, the first locking surface 211 is disposed on a side far from the jack body 1, a cross section of the locking groove 21 is a right triangle, the first locking surface 211 is a straight surface perpendicular to the pushing body 2, the first sliding surface 212 is an inclined surface, and the locking tooth 31 is provided with a second locking surface 311 in abutting engagement with the first locking surface 211 and a second sliding surface 312 in sliding engagement with the first sliding surface 212; when the locking teeth 31 are matched with the locking grooves 21, the first locking surface 211 and the second locking surface 311 are abutted to limit the push body 2 to move towards the jack body 1, so that the push body 2 has a relatively stable supporting effect on heavy objects; when the driving member 4 releases the driving force, the pushing body 2 can move outwards under the driving of the jack body 1, at this time, a relative sliding occurs between the first sliding surface 212 and the second sliding surface 312, the locking teeth 31 do not limit the movement of the pushing body 2, and if the pushing body 2 is retracted towards the jack body 1, the driving member 4 needs to be activated to lift the locking block 3, so that the locking teeth 31 are disengaged from the locking grooves 21.
As an alternative of this embodiment, the push rod mechanism further includes an elastic member 5 for driving the locking block 3 to move in the radial direction of the push body 2, the elastic member 5 is a spring directly purchased from the market, the spring is in a compressed state between the locking block 3 and the driving member 4 all the time, the elastic member 5 is sleeved on an output shaft of the driving member 4, one end of the elastic member 5 is fixedly welded to the driving member 4, the other end of the elastic member is fixedly welded to the locking block 3, and an annular mounting groove 32 for embedding the end of the elastic member 5 is formed in one side of the locking block 3 away from the push body 2; the arrangement of the elastic piece 5 further improves the engagement stability between the locking block 3 and the locking groove 21; through the design of the installation positions of the installation groove 32 and the elastic piece 5, the elastic force generated by the elastic piece 5 drives the locking block 3 to move towards the pushing body 2 all the time, so that the locking teeth 31 on the locking block 3 can be accurately embedded into the corresponding locking grooves 21 to realize locking.
As an alternative of the embodiment, the outer end of the push body 2 is connected with a top cover 7 through a screw 6; the top cover 7 can replace the end face of the push body 2 to be in direct contact with the push face of the steel support movable head, a certain protection effect can be achieved on the end part of the push body 2, and the service life of the self-locking jack is prolonged.
As an alternative of this embodiment, the pushing body 2 is provided with a supporting body 8 outside, one end of the supporting body 8 is fixedly connected to the oil cylinder of the jack body 1, the other end of the supporting body 8 abuts against the locking block 3, when the locking block 3 locks the pushing body 2, the pushing body 2 can offset the acting force of the locking block 3 generated by the pressure to the jack body 1 by the pushing force of the supporting body 8 to the locking block 3, and the locking block 3 is guaranteed to abut against the outer wall of the pushing body 2 vertically, so that the locking teeth 31 are stably embedded in the locking grooves 21 to achieve the purpose of locking.
The present invention and its embodiments have been described above schematically, without limitation, and what is shown in the drawings is only one of the embodiments of the present invention, and the actual structure is not limited thereto. Therefore, if the person skilled in the art receives the teaching, without departing from the spirit of the invention, the person skilled in the art shall not inventively design the similar structural modes and embodiments to the technical solution, but shall fall within the scope of the invention.
Claims (8)
1. The utility model provides a from locking-type jack for steel shotcrete is moved head which characterized in that: including jack body (1), locate push away body (2) on jack body (1) output shaft to and at least one and push away body (2) matched with locking structure, push away body (2) are cylindrical structure, locking structure is including locating two on pushing away body (2) outer circumference to open locking piece (3) and be used for driving piece (4) that locking piece (3) made a round trip to move along push away body (2) radius direction, be equipped with a plurality of locking teeth (31) on the butt face of locking piece (3) and push away body (2), be equipped with on push away body (2) outer wall a plurality of and locking tooth (31) matched with locking groove (21).
2. The self-locking jack for a steel support swivel according to claim 1, wherein: locking groove (21) include first locking face (211) and first glide plane (212), first glide plane (212) are located and are close to jack body (1) one side, first locking face (211) are located and are kept away from jack body (1) one side, be equipped with on locking tooth (31) with first locking face (211) butt complex second locking face (311) to and with first glide plane (212) sliding fit's second glide plane (312).
3. The self-locking jack for a steel support swivel according to claim 2, wherein: the push block is characterized by further comprising an elastic piece (5) used for driving the locking block (3) to move towards the radius direction of the push body (2).
4. A self-locking jack for a steel support swivel according to claim 3, wherein: the elastic piece (5) is sleeved on an output shaft of the driving piece (4), one end of the elastic piece (5) is connected to the driving piece (4), and the other end of the elastic piece is connected to the locking block (3).
5. The self-locking jack for a steel support swivel according to claim 4, wherein: and the locking block (3) is provided with a mounting groove (32) for embedding the end part of the elastic piece (5).
6. The self-locking jack for a steel support swivel according to claim 1, wherein: the outer end of the push body (2) is connected with a top cover (7) through a screw (6).
7. The self-locking jack for a steel support swivel according to claim 1, wherein: the driving piece (4) is a hydraulic oil cylinder.
8. The self-locking jack for a steel support swivel according to claim 7, wherein: the jack is characterized in that a supporting body (8) is arranged outside the pushing body (2), one end of the supporting body (8) is fixedly connected to an oil cylinder of the jack body (1), and the other end of the supporting body (8) abuts against the locking block (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010744975.0A CN111891965A (en) | 2020-07-29 | 2020-07-29 | Self-locking jack for steel support movable head |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010744975.0A CN111891965A (en) | 2020-07-29 | 2020-07-29 | Self-locking jack for steel support movable head |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111891965A true CN111891965A (en) | 2020-11-06 |
Family
ID=73182522
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010744975.0A Pending CN111891965A (en) | 2020-07-29 | 2020-07-29 | Self-locking jack for steel support movable head |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111891965A (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB247674A (en) * | 1924-11-25 | 1926-02-25 | Oswald Barber Newbould | Improvements in or relating to lifting jacks |
| CN2064765U (en) * | 1990-04-18 | 1990-10-31 | 黄陈淑霞 | Safety device for jack |
| CN2333695Y (en) * | 1998-06-23 | 1999-08-18 | 何志恒 | Screw slider external locking elevator |
| CN2339559Y (en) * | 1998-04-17 | 1999-09-22 | 丁振钰 | Safety jack |
-
2020
- 2020-07-29 CN CN202010744975.0A patent/CN111891965A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB247674A (en) * | 1924-11-25 | 1926-02-25 | Oswald Barber Newbould | Improvements in or relating to lifting jacks |
| CN2064765U (en) * | 1990-04-18 | 1990-10-31 | 黄陈淑霞 | Safety device for jack |
| CN2339559Y (en) * | 1998-04-17 | 1999-09-22 | 丁振钰 | Safety jack |
| CN2333695Y (en) * | 1998-06-23 | 1999-08-18 | 何志恒 | Screw slider external locking elevator |
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| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20201106 |