CN210686578U - One-way locking device of rod piece - Google Patents
One-way locking device of rod piece Download PDFInfo
- Publication number
- CN210686578U CN210686578U CN201921432534.6U CN201921432534U CN210686578U CN 210686578 U CN210686578 U CN 210686578U CN 201921432534 U CN201921432534 U CN 201921432534U CN 210686578 U CN210686578 U CN 210686578U
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- China
- Prior art keywords
- rod
- sleeve
- locking device
- shaft sleeve
- way locking
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Abstract
The utility model relates to an one-way locking device of member, including changeing cover (3), back axle sleeve (8), preceding axle sleeve (9), back axle sleeve (8) with preceding axle sleeve (9) are with axle center front-back butt joint, change cover (3) to set up outside back axle sleeve (8) and preceding axle sleeve (9), with back axle sleeve (8) and preceding axle sleeve (9) rotatable coupling. Compared with the prior art, the utility model discloses a change the cover and rotate the locking that realizes the member axial set direction, can be quick, the pinning axial position of optional position, the unblock only need simple will change the cover and turn back certain angle, convenient and fast.
Description
Technical Field
The utility model relates to a locking device especially relates to an one-way locking device of member.
Background
The rod member moving axially needs to be fixed in position when reaching the target position. Conventional axial rod locking is achieved with set screws or set pins. In actual rod use, such as minimally invasive surgical forceps rods, there is often no locking device or a device for limiting the movement of the handle is added on the handle to maintain the clamping state. These are cumbersome or do not allow accurate and timely axial movement of the locking lever, which ultimately affects the positioning of the instrument.
Chinese patent CN1261671C discloses a one-way locking method for a rod-shaped member, which is to put down a measured rod-shaped member downwards along a tapered channel with a large top and a small bottom, and then to arrange at least two rolling elements in the tapered channel, wherein the rolling elements keep a downward movement trend in the tapered channel; when the rod-shaped member loses the pull-up control and moves downwards under the condition of self weight, the rolling bodies roll downwards along the tapered wall surface of the cone channel along with the rod-shaped member, and when the distance between the rolling bodies is smaller than the minimum outer contour of the rod-shaped member, the rod-shaped member is clamped by using the friction force between the rolling bodies and the rod-shaped member, so that the rod-shaped member is prevented from sliding downwards. However, the locking device also needs a boiling water cone channel, the structure is more complex, and the cost is higher during processing and manufacturing.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing an one-way locking device of member in order to overcome the defect that above-mentioned prior art exists, realize the locking and the unblock of member axial quick, timely, optional position.
The purpose of the utility model can be realized through the following technical scheme:
the rod one-way locking device comprises a rotating sleeve, a rear shaft sleeve and a front shaft sleeve, wherein the rear shaft sleeve and the front shaft sleeve are coaxially butted front and back, and the rotating sleeve is arranged outside the rear shaft sleeve and the front shaft sleeve and is rotatably connected with the rear shaft sleeve and the front shaft sleeve.
The periphery of the front shaft sleeve is uniformly provided with movable stop rod seats, and movable stop rods are arranged in the movable stop rod seats.
The front shaft sleeve is uniformly distributed with a plurality of bosses relative to the end surface of the other side of the rear shaft sleeve, cylindrical pressure bar grooves are formed in the radial direction of the bosses, and the pressure bar grooves completely penetrate through the wall of the front shaft sleeve.
The bottom of the pressure bar groove is provided with a necking for placing a return spring, and the return spring is sleeved on the pressure bar and is arranged in the pressure bar groove.
The pressure lever is a stepped shaft-shaped pressure lever, and both ends in the axial direction are semi-spherical.
The rear shaft sleeve and the front shaft sleeve have the same diameter, the axes of the rear shaft sleeve and the front shaft sleeve are superposed, clamping grooves are uniformly distributed corresponding to the bosses of the front shaft sleeve, the bosses of the front shaft sleeve are matched and arranged in the clamping grooves, one end of the pressing plate and one end of the clamping grooves form a rotating pair, and the pressing plate can rotate up and down at the positions of the clamping grooves; the non-clamping groove end of the rear shaft sleeve is in a stepped shaft shape and is matched with the position of the rotating sleeve, the rotating sleeve is provided with a detachable check ring after being installed to limit the axial movement of the rotating sleeve, and an axial gap is reserved between the check ring and the rotating sleeve.
The diameter of the contact end of the pressure lever and the pressure plate is larger than that of the other end, and the smaller end of the diameter is the installation position of the reset spring.
The inner periphery of the rotating sleeve is provided with an involute boss with the diameter reduced along the circumferential direction, the involute boss corresponds to a clamping groove on the rear shaft sleeve, the rotating sleeve is rotated to change the included angle between the pressing plate and the axial direction through the boss, the front end of the rotating sleeve is provided with a stop rod groove matched with the size of the rod piece, the rear end of the rotating sleeve is in an end cover closed shape, and the center of the end cover is provided with a hole matched with the assembly position of the rear shaft sleeve.
The front end of the rotating sleeve is provided with a stop lever groove, and the size of the stop lever groove is matched with that of the movable stop lever.
The compression bar is arranged in the compression bar groove, the compression bar is compressed by the compression plate to enable the compression bar to be in contact with the rod piece, the maximum sliding friction force which can be provided by the compression bar and the rod piece is larger than the moving pulling force of the rod piece, the torque which is caused by the moving pulling force of the rod piece, the pressure of the compression plate and the friction force to the compression bar is zero, and the axial direction of the rod piece is locked.
After the pressing plate presses the pressing rod, the included angle between the pressing plate and the axial direction is smaller than the locking angle calculated by the friction coefficient, the stop lever on the front shaft sleeve is shifted into the stop lever groove, and the rotary sleeve boss is guaranteed to press the pressing plate and cannot rotate. When unlocking, the movable stop lever is pulled out, and the rotary sleeve is rotated to unlock.
Compared with the prior art, the utility model has the advantages of it is following:
(1) the rotation of the rotating sleeve is adopted to realize the locking of the rod piece in the axial set direction, and the axial position can be locked quickly at any position.
(2) The unlocking only needs to simply rotate the rotating sleeve to a certain angle, and is convenient and quick.
(3) The locking device can be suitable for locking rod pieces with various sizes smaller than the inner diameter of the shaft sleeve according to the adjustment of the length of the pressure rod, the length of the pressure plate and the radius of the rotating sleeve.
Drawings
FIG. 1 is a schematic structural view of a one-way locking device for a rod;
FIG. 2 is a schematic view of the front bushing;
FIG. 3 is a schematic view of the rear bushing;
FIG. 4 is a schematic view of a platen;
FIG. 5 is a schematic view of the compression bar;
fig. 6 is a schematic view of the swivel sleeve.
In the figure, 1-pressing plate, 2-involute boss, 3-rotating sleeve, 4-stop rod groove, 5-movable stop rod, 6-reset spring, 7-movable stop rod seat, 8-rear shaft sleeve, 9-front shaft sleeve, 10-pressing rod, 11-pressing rod groove, 12-necking, 13-pressing plate rotating hole, 14-rotating sleeve mounting position, 15-check ring, 16-pressing plate rotating shaft, 17-rotating sleeve mounting hole, 18-boss and 19-clamping groove.
Detailed Description
The present invention will be described in detail with reference to the following embodiments. The following examples will assist those skilled in the art in further understanding the present invention, but are not intended to limit the invention in any way. It should be noted that various changes and modifications can be made by one skilled in the art without departing from the spirit of the invention. These all belong to the protection scope of the present invention.
Example 1
A one-way locking device of a rod piece is structurally shown in figure 1 and comprises an external rotary sleeve 3, a front shaft sleeve 9 and a rear shaft sleeve 8 which are matched with each other inside, wherein a pressure rod groove 11 is formed in the front shaft sleeve 9, a return spring 6 and a pressure rod 10 can be placed in the groove, a movable pressure plate 1 is arranged on the rear shaft sleeve 8, a movable stop lever 5 is arranged on the front shaft sleeve 9, and a stop lever groove 4 in a corresponding position is formed in the rotary sleeve 3.
The structure of the front shaft sleeve 9 is as shown in fig. 2, a certain number of bosses 18 are uniformly distributed on the other end face of the front shaft sleeve opposite to the end face connected with the rear shaft sleeve, cylindrical pressure rod grooves 11 are radially formed in the bosses 18, the pressure rod grooves 11 completely penetrate through the wall of the front shaft sleeve, a necking 12 is formed in the bottom of each groove and used for placing a return spring 6, the return springs 6 are sleeved on pressure rods 10 and placed in the grooves, movable stop rod seats 7 are uniformly distributed on the periphery of the front shaft sleeve 9, and movable stop rods 5 are mounted on the movable stop rods.
The structure of the rear shaft sleeve 8 is as shown in fig. 3, the used rear shaft sleeve 8 and the used front shaft sleeve 9 have the same diameter, the axes are superposed, clamping grooves 19 are uniformly distributed at the positions corresponding to the bosses 18 of the front shaft sleeve 9, the bosses 18 of the front shaft sleeve 9 are matched and arranged in the clamping grooves 19, the structure of the pressing plate 1 is as shown in fig. 4, one end of the pressing plate 1 is provided with a pressing plate rotating shaft 16, the pressing plate rotating shaft is connected with the clamping grooves 19 through pressing plate rotating holes 13 to form a rotating pair, and the pressing plate 1 can rotate up and down; the non-clamping groove end of the rear shaft sleeve 8 is in a stepped shaft shape and is used for matching with a rotating sleeve mounting position 14 for mounting the rotating sleeve 3, a detachable check ring 15 is arranged after the rotating sleeve 3 is mounted to limit the axial movement of the rotating sleeve, and an axial gap is formed between the check ring 15 and the rotating sleeve 3.
The structure of the rotary sleeve 3 is as shown in fig. 6, an involute boss 2 with the diameter decreasing along the circumferential direction is arranged on the inner circumference of the rotary sleeve 3, the involute boss 2 corresponds to a clamping groove 19 on the rear shaft sleeve 8, the rotary sleeve 3 is rotated, the included angle between the pressure plate 1 and the axial direction is changed through the involute boss 2, a stop lever groove 4 matched with the size of a rod piece is arranged at the front end of the rotary sleeve 3, the rear end of the rotary sleeve is in an end cover closed shape, and a rotary sleeve mounting hole 17 matched with the assembly position of the rear shaft sleeve is formed in the center of the end cover.
The structure of the pressure lever 10 is shown in fig. 5, both axial ends of the pressure lever 10 are semi-spherical, the diameter of the contact end of the pressure lever 10 and the pressure plate 1 is larger than that of the other end, and the end with the smaller diameter is the installation position of the return spring.
The compression bar 10 is arranged in the compression bar groove 11, the compression bar 10 is compressed by the pressure plate 1, so that the compression bar 10 is in contact with the rod piece, the maximum sliding friction force provided by the compression bar 10 and the rod piece is greater than the moving tension force of the rod piece, the torque caused by the moving tension force of the rod piece, the pressure of the pressure plate and the friction force on the compression bar is zero, and the axial direction of the rod piece is locked.
After the pressing plate 1 compresses the pressing rod 10, the included angle between the pressing plate 10 and the axial direction is smaller than the locking angle calculated by the friction coefficient, the stop lever on the front shaft sleeve is shifted into the stop lever groove, and the rotary sleeve boss is guaranteed to compress the pressing plate and cannot rotate. When unlocking, the movable stop lever is pulled out, and the rotary sleeve is rotated to unlock.
The one-way locking device's of member preceding axle sleeve 9, the internal diameter of back axle sleeve 8 is the maximum dimension of locking member diameter, the device is applicable in the multiple size member less than this diameter, member axial displacement direction is from preceding axle sleeve 9 to back axle sleeve 8, when reacing the set position, rotate and change cover 3, compress tightly clamp plate 1 by gradually-opening boss 2 and then compress tightly depression bar 10, depression bar 10 and member contact, clamp plate 1 is less than friction locking angle with axial contained angle this moment, the member is fixed locking, stir movable pin 5 in pin groove 4, keep locking. When unlocking, the stop lever 5 is pulled open, the rotating sleeve 3 is rotated, the return spring 6 bounces the pressure lever 10, and the rod piece can move.
Example 2
The embodiment is an application example of a rod one-way locking device, a front shaft sleeve 9 and a rear shaft sleeve 8 of the rod one-way locking device are fixedly connected with an outer sleeve of a forceps rod of a laparoscopic forceps clamp, when a forceps head clamps tissues in operation, the forceps rod is locked by rotating a rotating sleeve 3, the clamping state of the forceps head can be kept, a movable stop lever 5 is shifted to a stop lever groove 4 to prevent the rotating sleeve from rotating, and five fingers at the handle of the forceps can not apply force any more.
In the description of the present invention, it is to be understood that the terms "front end," "outer periphery," "side," and the like are used for convenience of description and simplicity of description, and do not indicate or imply that the referenced components or elements must have a particular orientation, be constructed and operated in a particular orientation, and thus are not to be construed as limiting the present invention.
In the description herein, references to the description of "one embodiment," "an example," "a specific example," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The embodiments described above are intended to facilitate the understanding and use of the invention by those skilled in the art. It will be readily apparent to those skilled in the art that various modifications to these embodiments may be made, and the generic principles described herein may be applied to other embodiments without the use of the inventive faculty. Therefore, the present invention is not limited to the above embodiments, and those skilled in the art should make improvements and modifications within the scope of the present invention according to the disclosure of the present invention.
Claims (9)
1. A one-way locking device of a rod piece is characterized by comprising a rotating sleeve (3), a rear shaft sleeve (8) and a front shaft sleeve (9),
the rear shaft sleeve (8) and the front shaft sleeve (9) are coaxially butted front and back,
the rotary sleeve (3) is arranged outside the rear shaft sleeve (8) and the front shaft sleeve (9) and is rotatably connected with the rear shaft sleeve (8) and the front shaft sleeve (9).
2. A rod one-way locking device according to claim 1, wherein the front bushing (9) has movable stop rod seats (7) uniformly distributed on the outer circumference, and the movable stop rod seats (7) are internally provided with movable stop rods (5).
3. A rod one-way locking device according to claim 1, wherein the front sleeve (9) is provided with a plurality of bosses (18) on the end surface opposite to the other side connected with the rear sleeve (8), and the bosses (18) are provided with cylindrical pressure bar grooves (11) in the radial direction.
4. A rod one-way locking device according to claim 3, characterized in that the bottom of the pressure rod groove (11) is provided with a necking (12) for placing the return spring (6), and the return spring (6) is sleeved on the pressure rod (10) and placed in the pressure rod groove (11).
5. A unidirectional rod locking device according to claim 4, wherein said strut (10) is a stepped shaft shaped strut with semi-spherical axial ends.
6. A unidirectional rod locking device according to claim 5, wherein the rear sleeve (8) is provided with a slot (19), the boss (18) provided on the front sleeve (9) is fittingly arranged in the slot (19), and one end of the slot (19) is provided with the rotatable pressing plate (1).
7. A rod one-way locking device according to claim 6, wherein the diameter of the end of the pressure rod (10) contacting the pressure plate (1) is larger than that of the other end.
8. A rod one-way locking device according to claim 6, characterized in that the inner circumference of the rotary sleeve (3) is provided with an involute boss (2) with a diameter decreasing along the circumferential direction, and the involute boss (2) corresponds to a clamping groove (19) on the rear shaft sleeve (8).
9. A unidirectional rod locking device according to claim 2, characterized in that the front end of the rotary sleeve (3) is provided with a stop lever groove (4), and the stop lever groove (4) is matched with the movable stop lever (5) in size.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921432534.6U CN210686578U (en) | 2019-08-30 | 2019-08-30 | One-way locking device of rod piece |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921432534.6U CN210686578U (en) | 2019-08-30 | 2019-08-30 | One-way locking device of rod piece |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210686578U true CN210686578U (en) | 2020-06-05 |
Family
ID=70883519
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921432534.6U Expired - Fee Related CN210686578U (en) | 2019-08-30 | 2019-08-30 | One-way locking device of rod piece |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210686578U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110439901A (en) * | 2019-08-30 | 2019-11-12 | 上海理工大学 | A kind of rod piece unilateral locking device |
-
2019
- 2019-08-30 CN CN201921432534.6U patent/CN210686578U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110439901A (en) * | 2019-08-30 | 2019-11-12 | 上海理工大学 | A kind of rod piece unilateral locking device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20200605 Termination date: 20210830 |
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| CF01 | Termination of patent right due to non-payment of annual fee |