CN218201970U - Screw rod elevator with automatic rotation function of screw rod - Google Patents
Screw rod elevator with automatic rotation function of screw rod Download PDFInfo
- Publication number
- CN218201970U CN218201970U CN202222331522.2U CN202222331522U CN218201970U CN 218201970 U CN218201970 U CN 218201970U CN 202222331522 U CN202222331522 U CN 202222331522U CN 218201970 U CN218201970 U CN 218201970U
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- screw rod
- rotation
- lead screw
- shell
- freedom
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Abstract
The utility model discloses a to current lead screw lift only possess a degree of freedom usually, need a plurality of lead screw lift cooperations not only to increase the whole complexity of device and also increased control cost in demand multi freedom's occasion, for solving above-mentioned problem, designed a lead screw takes lead screw lift of automatic gyration function, include: the anti-rotation square block is arranged in the shell, sleeved on the screw rod and used for limiting the degree of freedom of rotation of the screw rod; the middle section of the machine shell is also provided with a rotary cavity, and the rotary cavity is matched with the anti-rotation square block and is used for providing the rotation freedom degree of the screw rod; the one-way anti-rotation device is arranged in the shell, and one end of the screw rod is in transmission connection with the screw rod and used for limiting the rotational degree of freedom of the screw rod in one direction. The same bearing has double-freedom-degree limitation, can be suitable for scenes of double-freedom-degree demand occasions, and simplifies the control flow and the complexity of the whole structure.
Description
Technical Field
The utility model relates to a lead screw tradition field, concretely relates to lead screw takes lead screw lift of automatic gyration function.
Background
The screw rod lifter is also called a spiral transmission mechanism. It is mainly used to convert rotary motion into linear motion or linear motion into rotary motion. A feed screw, such as a machine tool table, which is primarily used for transmitting motion; there are also screw drive mechanisms for adjusting the relative positions of the parts. However, existing lead screw elevators tend to perform only one degree of freedom of movement and would require at least two devices to cooperate in the face of the following.
In a door locking mechanism, a door locking pin needs to move axially and rotate 90 degrees in the circumferential direction after moving in place to complete the door opening or tensioning function. Conventional screw elevators can only achieve a single degree of freedom, and therefore at least two mechanisms are required to achieve this door locking mechanism, one responsible for the rotation function and one responsible for the tensioning function. This has greatly increased control cost and mechanism weight, for this reason need propose a lead screw lift of lead screw area automatic gyration function.
SUMMERY OF THE UTILITY MODEL
The utility model discloses a to current lead screw lift only possess a degree of freedom usually, need a plurality of lead screw lift cooperations at demand multi freedom's occasion not only to increase the whole complexity of device and also increased control cost, for solving above-mentioned problem, designed a lead screw takes lead screw lift of automatic gyration function.
The utility model provides a lead screw takes lead screw lift of autogyration function, includes: a screw rod, a worm wheel and a machine shell,
the anti-rotation block is arranged in the shell and sleeved on the screw rod and used for limiting the rotation freedom degree of the screw rod;
the middle section of the machine shell is also provided with a rotary cavity, and the rotary cavity is matched with the anti-rotation square block and is used for providing the rotary freedom degree of the screw rod;
the one-way anti-rotation device is arranged in the shell, and one end of the screw rod is in transmission connection with the screw rod and used for limiting the rotational degree of freedom of the screw rod in one direction.
Preferably, the housing includes:
the inner part of the square protection tube is used for arranging an anti-rotation square block, a one-way anti-rotation device and a screw rod, and the bottom of the square protection tube is fixedly connected with a connecting flange;
the size of the connecting flange is matched with that of the rotating shell cover, one end of the connecting flange is fixedly connected with the square protection tube, and the other end of the connecting flange is detachably connected with the rotating shell cover;
the rotating shell cover is arranged at the top of the worm gear shell, the rotating shell cover is hollow, a screw rod penetrating hole is formed in the lower end face of the rotating shell cover, and the rotating shell cover and the connecting flange form a rotating cavity;
and the worm wheel shell is used for accommodating a worm wheel and is detachably connected with the rotary shell cover.
Preferably, the inner bottom surface of the rotating shell cover is also provided with a thrust bearing, the thrust bearing and the lead screw penetrating hole are coaxially arranged, and the thrust bearing and the anti-rotation block work in a matched mode.
Preferably, the one-way rotation preventing device comprises:
the end part of the screw rod extends to form a connecting shaft section;
the connecting shaft section is connected with a first end of the one-way clutch, and a second end of the one-way clutch is provided with a second anti-rotation block;
the second anti-rotation block is matched with the shell to limit the rotational freedom degree, and the one-way clutch limits the effective direction of the second anti-rotation block.
Preferably, the end part of the screw rod is also provided with a coupling; the first end of the coupler is in transmission with the screw rod, and the second end of the coupler is connected with an encoder; still be provided with the encoder support in the casing, the encoder sets up on the encoder support, and the encoder support is used for guaranteeing that the encoder casing can not lead to the encoder inefficacy along with the lead screw is together rotated.
Preferably, the one-way clutch is a one-way cam clutch.
Preferably, the screw rod is a trapezoidal screw rod.
Equipment the utility model discloses a during lead screw takes lead screw lift of automatic gyration function, at first with square protection tube and coupling flange welding, with lead screw, worm wheel and worm-gear shell equipment, pass the lead screw through hole of rotatory cap with the lead screw, fix rotatory cap on the worm-gear shell.
The anti-rotation square blocks are sleeved on the trapezoidal screw rod, the second anti-rotation square blocks are fixed on the unidirectional cam clutch through elastic pins, and the unidirectional cam clutch is installed at the end part of the trapezoidal screw rod.
The end part of the trapezoidal screw rod is connected with an encoder through a coupler.
Then the anti-rotation square block, the second anti-rotation square block and the encoder bracket are all plugged into the square protective tube, the connecting flange is buckled on the rotary shell cover, and the connecting flange, the rotary shell cover and the worm gear shell are fixed through the screw and the elastic pin.
In use, the stage is taken as an example, and the expansion stage is firstly: the worm wheel drives the screw rod to rotate, and under the matching of the anti-rotation square block and the square protection tube, the rotation freedom degree of the trapezoidal screw rod is limited, so that the trapezoidal screw rod can extend out under the driving of the worm wheel.
The second is the rotation stage after the stretching out: when the lead screw stretches out forward all the time, prevent changeing the square and can move in square protection tube along with trapezoidal lead screw until preventing changeing the square and break away from with the cooperation state of square protection tube, the lead screw just is converted to the rotation state this moment, enters into the rotation state after, the lead screw can stretch out while rotatory, touches thrust bearing until preventing changeing the square, and the straight line of lead screw is stretched out the degree of freedom and is restricted, and the lead screw can only rotate.
By reading the rotary encoder data, when the lead screw completes the required rotation angle, the worm gear can stop rotating (the motor driving the worm gear to rotate stops rotating.)
And (3) a reverse stage: the worm wheel reversely rotates, the degree of freedom of reverse rotation of the screw rod is limited by the one-way anti-rotation device at the moment, the screw rod can only retract linearly, when the anti-rotation square retracts into the square protection pipe, the anti-rotation square is matched with the square protection pipe, after retracting for a certain distance, the screw rod can bear load, the load is firmly pulled, and meanwhile, the anti-rotation square bears the limited rotation torque. Because the self-locking function of trapezoidal lead screw, the motor can cut off the power supply this moment, and the lead screw still can firmly hold the load.
Wherein the one-way clutch does not limit the cam clutch, can be: a lost motion clutch, a wedge clutch, an overrunning clutch, a backstopping clutch or a ratchet structure.
The beneficial effects of the utility model reside in that: the same bearing has double-freedom-degree limitation, can be suitable for scenes of double-freedom-degree demand occasions, and simplifies the control flow and the complexity of the whole structure. The situation that two screw rod lifters are needed in a scene needing axial movement and circumferential rotation at the same time is avoided.
Drawings
Fig. 1 is a schematic view of the telescopic state of the screw rod of the present invention;
fig. 2 is a schematic view of the rotation state of the screw rod of the present invention.
In the figure: 1. worm-gear shell, 2, rotatory cap, 3, coupling flange, 4, square protection tube, 5, trapezoidal lead screw, 6, worm wheel, 7, footstep bearing, 8, prevent changeing the square, 9, one-way clutch, 10, second prevent changeing the square, 11, shaft coupling, 12, encoder, 13, encoder support.
Detailed Description
The technical solution of the present invention is further specifically described below by using specific embodiments and with reference to the accompanying drawings.
Example 1
As shown in fig. 1 and 2, the lead screw elevator with an automatic rotation function of the lead screw comprises: a screw rod, a worm wheel 6 and a machine shell,
the anti-rotation block 8 is arranged in the shell, sleeved on the screw rod and used for limiting the rotation freedom degree of the screw rod;
the middle section of the machine shell is also provided with a rotary cavity, and the rotary cavity is matched with the anti-rotation square block 8 and is used for providing the rotary freedom degree of the screw rod;
the one-way anti-rotation device is arranged in the shell, and one end of the screw rod is in transmission connection with the screw rod and used for limiting the rotational degree of freedom of the screw rod in one direction.
The casing, include:
the square protection tube 4 is internally used for arranging an anti-rotation square 8, a one-way anti-rotation device and a screw rod, and the bottom of the square protection tube is fixedly connected with the connecting flange 3;
the connecting flange 3 is matched with the rotary shell cover 2 in size, one end of the connecting flange is fixedly connected with the square protection tube 4, and the other end of the connecting flange is detachably connected with the rotary shell cover 2;
the rotating shell cover 2 is arranged at the top of the worm gear shell 1, is hollow, is provided with a screw rod penetrating hole on the lower end face, and forms a rotary cavity with the connecting flange 3 through the rotating shell cover 2;
and the worm wheel shell 1 is used for accommodating a worm wheel and is detachably connected with the rotating shell cover 2.
The inner bottom surface of the rotating shell cover 2 is also provided with a thrust bearing 7, the thrust bearing 7 is coaxially arranged with the screw rod penetrating hole, and the thrust bearing 7 is matched with an anti-rotating block 8 to work.
The one-way anti-rotation device comprises:
the end part of the screw rod extends to form a connecting shaft section;
the connecting shaft section is connected with a first end of a one-way clutch 9, and a second end of the one-way clutch 9 is provided with a second anti-rotation block 10;
the second anti-rotation block 10 cooperates with the housing to limit the rotational degree of freedom, and the one-way clutch 9 limits the effective direction of the second anti-rotation block 10.
The end part of the screw rod is also provided with a coupling 11; the first end of the coupler 11 is in transmission with the screw rod, and the second end of the coupler 11 is connected with an encoder 12; still be provided with encoder support 13 in the casing, the encoder sets up on the encoder support, and the encoder support is used for guaranteeing that the encoder casing can not lead to the encoder inefficacy along with the lead screw is together rotated.
The one-way clutch 9 is a one-way cam clutch.
The screw rod is a trapezoidal screw rod 5.
Equipment the utility model discloses a during lead screw takes automatic lead screw lift of gyration function, at first with square protection tube 4 and the welding of coupling flange 3, with 1 equipment of lead screw, worm wheel and worm wheel shell, pass the lead screw through hole of rotatory cap 2 with the lead screw, fix rotatory cap 2 on worm wheel shell 1.
The anti-rotation block 8 is sleeved on the trapezoidal screw rod 5, the unidirectional cam clutch is fixed with the second anti-rotation block 10 by an elastic pin, and the unidirectional cam clutch is arranged at the end part of the trapezoidal screw rod 5.
An encoder is connected to the end part of the trapezoidal screw rod 5 through a coupling 11.
Then, the anti-rotation square blocks 8, the second anti-rotation square blocks 10 and the encoder bracket are all plugged into the square protection tube 4, the connecting flange 3 is buckled on the rotating shell cover 2, and the connecting flange 3, the rotating shell cover 2 and the worm gear shell 1 are fixed through screws and elastic pins.
In use, taking a phase example, a telescoping phase is firstly: the worm wheel drives the screw rod to rotate, and under the matching of the anti-rotation square 8 and the square protection tube 4, the rotation freedom degree of the trapezoidal screw rod 5 is limited, so that the trapezoidal screw rod 5 can extend out under the driving of the worm wheel.
The second is the rotation stage after stretching out: stretch out forward all the time when the lead screw, prevent changeing the square 8 and can move in square protection tube 4 along with trapezoidal lead screw 5 until preventing changeing the square 8 and break away from with square protection tube 4's cooperation state, the lead screw just is converted to the rotation state this moment, enters into the rotation state after, the lead screw can stretch out on the limit of rotation, and the straight line of lead screw is stretched out the degree of freedom and is restricted, and the lead screw can only rotate until preventing changeing square 8 and touch footstep bearing 7.
By reading the rotary encoder data, when the lead screw completes the required rotation angle, the worm wheel can stop rotating (the motor driving the worm wheel to rotate stops rotating.)
And (3) a reverse stage: the worm wheel rotates reversely, because the degree of freedom of the reverse rotation of the screw rod is limited by the one-way anti-rotation device at the moment, the screw rod can only retract linearly, when the anti-rotation square 8 retracts into the square protection tube 4, the anti-rotation square 8 is matched with the square protection tube 4, after retracting for a certain distance, the screw rod can bear load, the load is firmly pulled, and meanwhile, the anti-rotation square 8 bears the limited rotation torque. Due to the self-locking function of the trapezoidal screw rod 5, the motor can be powered off at the moment, and the screw rod still can firmly pull the load.
Wherein the one-way clutch 9 does not limit the cam clutch, but may be: a lost motion clutch, a wedge clutch, an overrunning clutch, a backstopping clutch or a ratchet structure.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (7)
1. The utility model provides a lead screw takes lead screw lift of autogiration function, includes: lead screw, worm wheel and casing, its characterized in that still includes:
the anti-rotation block is arranged in the shell and sleeved on the screw rod and used for limiting the rotation freedom degree of the screw rod;
the middle section of the machine shell is also provided with a rotary cavity, and the rotary cavity is matched with the anti-rotation square block and is used for providing the rotary freedom degree of the screw rod;
the one-way anti-rotation device is arranged in the shell, and one end of the screw rod is in transmission connection with the screw rod and used for limiting the rotational degree of freedom of the screw rod in one direction.
2. The lead screw elevator with automatic rotation function of lead screw according to claim 1, wherein the housing comprises:
the inner part of the square protection tube is used for arranging an anti-rotation square block, a one-way anti-rotation device and a screw rod, and the bottom of the square protection tube is fixedly connected with a connecting flange;
the connecting flange is matched with the rotary shell cover in size, one end of the connecting flange is fixedly connected with the square protection tube, and the other end of the connecting flange is detachably connected with the rotary shell cover;
the rotating shell cover is arranged at the top of the worm gear shell, the rotating shell cover is hollow, a lead screw penetrating hole is formed in the lower end face of the rotating shell cover, and the rotating shell cover and the connecting flange form a rotating cavity;
and the worm wheel shell is used for accommodating a worm wheel and is detachably connected with the rotary shell cover.
3. The screw rod lifter with the automatic rotating function of the screw rod according to claim 2, characterized in that the inner bottom surface of the rotating shell cover is further provided with a thrust bearing, the thrust bearing is coaxially arranged with the screw rod penetrating hole, and the thrust bearing is matched with the anti-rotating block to work.
4. The screw rod lifter with the automatic rotation function of the screw rod according to claim 1, wherein the one-way rotation preventing device comprises:
the end part of the screw rod extends to form a connecting shaft section;
the connecting shaft section is connected with a first end of the one-way clutch, and a second end of the one-way clutch is provided with a second anti-rotation block;
the second anti-rotation block is matched with the shell to limit the rotational freedom degree, and the one-way clutch limits the effective direction of the second anti-rotation block.
5. The screw rod lifter with the automatic rotating function of the screw rod according to claim 1 or 4, characterized in that a coupler is further arranged at the end part of the screw rod; the first end of the coupler is in transmission with the screw rod, and the second end of the coupler is connected with an encoder; still be provided with the encoder support in the casing, the encoder sets up on the encoder support, and the encoder support is used for guaranteeing that the encoder casing can not lead to the encoder inefficacy along with the lead screw is together rotated.
6. The lead screw elevator with automatic rotation function of the lead screw according to claim 4, characterized in that the one-way clutch is a one-way cam clutch.
7. The screw rod elevator with the automatic rotation function of the screw rod as claimed in claim 1, wherein the screw rod is a trapezoidal screw rod.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222331522.2U CN218201970U (en) | 2022-09-02 | 2022-09-02 | Screw rod elevator with automatic rotation function of screw rod |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222331522.2U CN218201970U (en) | 2022-09-02 | 2022-09-02 | Screw rod elevator with automatic rotation function of screw rod |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218201970U true CN218201970U (en) | 2023-01-03 |
Family
ID=84629442
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202222331522.2U Active CN218201970U (en) | 2022-09-02 | 2022-09-02 | Screw rod elevator with automatic rotation function of screw rod |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN218201970U (en) |
-
2022
- 2022-09-02 CN CN202222331522.2U patent/CN218201970U/en active Active
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