CN202746532U - Ratchet wheel, ratchet-pawl mechanism and operation bed comprising same - Google Patents
Ratchet wheel, ratchet-pawl mechanism and operation bed comprising same Download PDFInfo
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- CN202746532U CN202746532U CN 201220320421 CN201220320421U CN202746532U CN 202746532 U CN202746532 U CN 202746532U CN 201220320421 CN201220320421 CN 201220320421 CN 201220320421 U CN201220320421 U CN 201220320421U CN 202746532 U CN202746532 U CN 202746532U
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- ratchet
- teeth groove
- groove
- face
- fork
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Abstract
The utility model discloses a ratchet wheel and a ratchet-pawl mechanism, wherein the ratchet wheel is matched with a pawl capable of moving along the ratchet wheel along the forward direction, and comprises a plurality of one-way tooth slots distributed along the circumference, and at least one locating tooth slot which is arranged along the circumference and is used for locking and locating the pawl at a preset position; the locating tooth slot is matched with the pawl; and the shape of the locating tooth slot is different from those of the one-way tooth slots. The ratchet-pawl mechanism is capable of realizing forward intermittent movement while reversely self-locking, and can realize limiting at the preset position as well as forward and reverse self-locking at the preset position; and the ratchet-pawl mechanism can realize limiting and self-locking without designing additional parts, so that the ratchet-pawl mechanism is effectively simplified, the cost is lowered, and the stability of mechanism running can be improved.
Description
Technical field
The application relates to the ratchet mechanism field.
Background technique
Operation footpost board component usually need to be positioned at different vertical directions and satisfy different location of operation requirements.At present, the structure that realizes leg board component vertical direction location mainly contains air spring and click, the advantages such as that click has is simple in structure, easy to manufacture, angle is adjusted easily, easy and simple to handle and stable and reliable operation are widely used in the vertical direction location of leg board component.
Adopt the click structure to realize leg board component vertical direction location, the ratchet one-time positioning can realize straight down self-locking usually, and different operation position demands are satisfied in straight up intermittently-driving.But, when the leg board component need to be when certain angle be spacing, must rely on the part except click to realize spacing, so, not only can make complex structure, reduce product reliability, increase manufacture cost and assembling difficulty, and under some specific environment, affect product appearance, allow the client be difficult to accept.
The model utility content
The application provides a kind of simple in structure and lower-cost ratchet and ratchet and pawl arrangement.
The application provides a kind of click bidirectional self-locking mechanism, a kind of ratchet, be used for can be along the click-fit of described ratchet positive movement, comprise circumferential a plurality of unidirectional teeth groove, also comprise along at least one of described circle distribution and be used for location teeth groove at the described ratchet of desired location locking and positioning, described location teeth groove and described ratchet coupling, and the shape of described location teeth groove and unidirectional teeth groove is different.
This forward can be the clockwise direction around the ratchet axis, also can be counterclockwise.
Ratchet is during along the ratchet positive movement, unidirectional teeth groove and ratchet engagement; During the ratchet reversing motion, unidirectional teeth groove pins ratchet.
Further, described location teeth groove and unidirectional teeth groove all have the first groove face and the second groove face that sets gradually at described forward, and described the first groove face and the second groove face arrange in opposite directions, and the top of the second groove face of described location teeth groove tilts to described the first groove face.
The bottom of the first groove face and the second groove face can directly link to each other, and also can be that the first groove face links to each other by bottom land with the second groove face.
Further, the second groove face of described unidirectional teeth groove is the inclined-plane, and the first groove face of described unidirectional teeth groove and the second groove face formation V-type.
The first groove face of the first groove face of unidirectional teeth groove and location teeth groove can be the inclined-plane.
The inclined-plane can be the plane that tilts, and also can be the inclined surface with radian.
A kind of ratchet and pawl arrangement, comprise ratchet, ratchet, fixed block, fork and movable part, described ratchet cooperates with described ratchet and can be along described ratchet positive movement, described ratchet has a plurality of unidirectional teeth groove along its circle distribution, described ratchet is fixed in described fixed block, described ratchet is fixed in described fork, described fork and described movable part are rotationally connected, described movable part and described ratchet are rotationally connected and can drive described fork and rotate around the axis of described ratchet, described ratchet also comprises at least one the location teeth groove along described circle distribution, described location teeth groove and described ratchet coupling, the shape of described location teeth groove and unidirectional teeth groove is different, when described ratchet moves to described location teeth groove, the described ratchet of described location teeth groove locking and positioning.
Ratchet is fixed in fixed block, and ratchet is arranged at movable part.When being the click cooperation, ratchet can not rotate, and ratchet can rotate along ratchet.
Further, described location teeth groove and unidirectional teeth groove all have the first groove face and the second groove face that sets gradually at described forward, and described the first groove face and the second groove face arrange in opposite directions, and the top of the second groove face of described location teeth groove tilts to described the first groove face.
Further, the second groove face of described unidirectional teeth groove is the inclined-plane, and the first groove face of described unidirectional teeth groove and the second groove face formation V-type.
Further, described ratchet and pawl arrangement, also comprise ratchet fixed base and elastic reset spare, described fork is rotationally connected by described ratchet fixed base and described movable part, described fork and described ratchet fixed base are slidingly matched, and the two ends of described return unit compress respectively described ratchet fixed base and fork, and described ratchet slides between engaging position and disengaging configuration, when the engaging position, described ratchet and described unidirectional teeth groove or location teeth groove engagement; When the disengaging configuration, described ratchet withdraws from described unidirectional teeth groove or location teeth groove; Described ratchet is positioned at described engaging position when initial, described return unit can be reset to the engaging position with described ratchet self-separation position.
During the ratchet positive movement, ratchet breaks away from a unidirectional teeth groove that is positioned at the below gradually, until slip into the unidirectional teeth groove in the top that is adjacent.
Further, described ratchet has guiding surface, described guiding surface and the engagement of the second groove face; Described fork props up the lower to locking face of described ratchet when having for described ratchet reversing motion, the described lower below that is positioned at described guiding surface from locking face.
During the ratchet positive movement, the second groove face of unidirectional teeth groove forces in guiding surface, and then drives the fork retraction.
By arranging down from locking face, can realize that ratchet upwards can intermittent movement, and downward locking.
Further, described fork also has upper from locking face, describedly upward is positioned at the top of described guiding surface from locking face, described ratchet lock in place when the teeth groove of described location, the described upper notch edges that props up described location teeth groove from locking face.
By arranging from locking face, can be when desired location, ratchet is realized bidirectional locking by upper and lower from locking face.
Further, described ratchet and pawl arrangement also comprises handle, and described ratchet is located at the front end of described fork, and described handle is fixed in the rear end of described fork.
By the operation handle, can remove the locking state between ratchet and unidirectional teeth groove or the location teeth groove.
Further, the application also provides a kind of operation table that comprises aforesaid ratchet and pawl arrangement.
The application's beneficial effect is: ratchet and pawl arrangement can be realized the forward intermittent movement and reverse self-locking, can also realize at desired location spacingly, and realizes forward and reverse self-locking at desired location; This ratchet and pawl arrangement does not need to design extra part and realizes spacing, self-locking, has effectively simplified ratchet and pawl arrangement, has reduced cost, has improved the stability of mechanism's operation.
Description of drawings
Fig. 1 is the plan view of ratchet and pawl arrangement the first embodiment;
Fig. 2 is the three-dimensional exploded view of the first embodiment;
Fig. 3 is the structural representation of the ratchet of the first embodiment;
Fig. 4 is the perspective view of the adjustment assembly of the first concrete mode;
Fig. 5 is the perspective exploded view of the adjustment assembly of the first concrete mode;
Fig. 6 is the cross-sectional schematic of the adjustment assembly of the first concrete mode;
Fig. 7 is the structural representation of the ratchet of the first embodiment;
Fig. 8 is the ratchet of the first embodiment and the structural representation of fork;
Fig. 9 is the schematic representation when folding to the limes superiors position on the first embodiment;
Figure 10 is the ratchet of the second embodiment, the structural representation of ratchet;
Figure 11 is the structural representation of the ratchet of the 3rd embodiment.
Embodiment
By reference to the accompanying drawings the utility model is described in further detail below by embodiment.
To shown in Figure 9, it is the first embodiment of ratchet and pawl arrangement such as Fig. 1.
This ratchet and pawl arrangement comprises fixed block 1, ratchet 8, ratchet 22, fork 9 and movable part 5.Ratchet 8 is fixed in this fixed block 1, ratchet 22 is fixing with fork 9, fork 9 is rotationally connected with movable part 5 by the first rotating shaft 4, and movable part 5 is rotationally connected with ratchet 8 by the second rotating shaft 2 and can rotates around the axis of ratchet 8, and ratchet 22 can be along ratchet 8 positive movements.This first rotating shaft 4 can be parallel with the second rotating shaft 2.
Ratchet 8 has along a plurality of unidirectional teeth groove 23 of its circle distribution and at least one location teeth groove 24.When unidirectional teeth groove 23 is used for positive movement with ratchet 22 engagements, locking ratchet 22 when reaching reversing motion.Location teeth groove 24 is used at desired location locking and positioning ratchet 22.Location teeth groove 24 and ratchet 22 couplings, and the shape of unidirectional teeth groove 23 and location teeth groove 24 is different.
Herein, " positive movement " refers on the movable part 5 folding motion and the ratchet 22 that causes and the relative movement between the ratchet 8, also namely the ratchet in the embodiment of Fig. 1 and Fig. 2 22 with respect to the counterclockwise motion of ratchet 8.With the rightabout motion of positive movement be " reversing motion ".
The first groove face 25 and second groove face 26 of unidirectional teeth groove all can be the inclined-plane.The second groove face 26 of location teeth groove can be the inclined-plane.
During upper folding movable part 5, movable part 5 rotates with fork 9, fork 9 with ratchet 22 along ratchet 8 to moving.In the upper folding process, ratchet 22 is along each unidirectional teeth groove 23 intermittent movements of ratchet 8; When ratchet 22 moves to the location during teeth groove 24, ratchet 22 teeth groove 24 locking and positioning that are positioned are realized spacing and forward and reverse self-locking of ratchet 22.
Ratchet and pawl arrangement can also comprise ratchet fixed base 13 and elastic reset spare 12.Ratchet fixed base 13 is articulated on the movable part 5 by the second rotating shaft 2.Ratchet fixed base 13 has the chute 27 that laterally runs through and stroke limit groove 31 longitudinally, this chute 27 connects with stroke limit groove 31, also can be in these chute 27 interior horizontal slips in fork 9 laterally inserted these chutes 27, this fork 9 is fixing with the stroke post 11 that stands up, and the trip post 11 is in the 31 interior slips of the trip restraining groove.Return unit 12 can be on the glide direction of fork 9 dilatation, the two ends of this return unit 12 compress respectively ratchet fixed base 13 and fork 9.On glide direction, ratchet 22 has engaging position and disengaging configuration, when the engaging position, ratchet 22 stretch into unidirectional teeth groove or the location teeth groove and with its engagement; When the disengaging configuration, ratchet withdraws from unidirectional teeth groove or location teeth groove.When initial, ratchet is in the engaging position; Ratchet moves in the process of disengaging configuration from the engaging position, return unit is compressed, when ratchet moves to tooth top between the two adjacent teeth groove (unidirectional teeth groove, location teeth groove), the return unit decrement is maximum, when ratchet moves to another teeth groove from this tooth top, return unit recovers deformation, drives ratchet pawl reset and meshes with this another teeth groove to the engaging position.Return unit such as spring.
Ratchet and pawl arrangement can also comprise handle 18, and this handle 18 is fixed on the rear end of fork 9, can be fixed on by hexagon nut 15, packing ring 16, plain cushion 17 rear end of fork 9 such as fork.
Ratchet and pawl arrangement can also comprise a plurality of adjusting screw 14, and each adjusting screw 14 stands up and is threaded with ratchet fixed base 13, and it can regulate the angle range of ratchet fixed base when the first rotating shaft 4 is rotated.Because ratchet fixed base 13 rotates together with fork 9 and ratchet 22, it also is equivalent to regulate the angle range of ratchet.
In the present embodiment, ratchet, fork, ratchet fixed base and handle etc. can consist of one and adjust assembly 3, and this adjustment assembly and ratchet 8 cooperate to adjust the position of movable part 5.
In the present embodiment, the location teeth groove has one, and it is positioned at the top of all unidirectional teeth groove.The ratchet fixed base both can rotate with movable part with fork, also can rotate relative to movable part with fork.
The present embodiment ratchet and pawl arrangement can be applied to the footpost board component of performing the operation, and the leg plate 6 of operation bed board assembly can keep flat and be fixed on movable part 5 tops by screw 7.
As shown in figure 10, it is the second embodiment.The main distinction of this mode of execution and the first embodiment is: fork only arranges down from locking face and does not arrange from locking face.When ratchet 20 moved to the location teeth groove of ratchet 19, ratchet snapped in the location teeth groove, has realized spacing and forward and reverse self-locking of ratchet.
As shown in figure 11, it is the 3rd embodiment.The main distinction of this mode of execution and first and second mode of execution is: by the change slot form, not only can realize the spacing of limit position, and can be implemented in position reminding and the location of special angle; It can realize movable part in the location of limes superiors, limit inferior and horizontal position, therefore, except can realizing that upper folding is spacing, also can be implemented in the position reminding of horizontal position, firm at lower folding limit position, and the rocking etc. of the part that takes in sail.
In the present embodiment, ratchet has three location teeth groove 24 of corresponding limes superiors position, limit inferior position and horizontal position.
Ratchet and pawl arrangement not only can be used for operation footpost board component, also can be used for the medical equipment such as operation head of a bed board component and operation table annex.
Above content is in conjunction with concrete mode of execution further detailed description of the utility model, can not assert that implementation of the present utility model is confined to these explanations.For the utility model person of an ordinary skill in the technical field, without departing from the concept of the premise utility, can also make some simple deduction or replace.
Claims (11)
1. ratchet, be used for can be along the click-fit of described ratchet positive movement, comprise circumferential a plurality of unidirectional teeth groove, it is characterized in that, also comprise along at least one of described circle distribution and be used for location teeth groove at the described ratchet of desired location locking and positioning, described location teeth groove and described ratchet coupling, and the shape of described location teeth groove and unidirectional teeth groove is different.
2. ratchet as claimed in claim 1, it is characterized in that, described location teeth groove and unidirectional teeth groove all have the first groove face and the second groove face that sets gradually at described forward, described the first groove face and the second groove face arrange in opposite directions, and the top of the second groove face of described location teeth groove tilts to described the first groove face.
3. ratchet as claimed in claim 2 is characterized in that, the second groove face of described unidirectional teeth groove is the inclined-plane, and the first groove face of described unidirectional teeth groove and the second groove face formation V-type.
4. ratchet and pawl arrangement, comprise ratchet and ratchet, described ratchet cooperates with described ratchet and can be along described ratchet positive movement, described ratchet has a plurality of unidirectional teeth groove along its circle distribution, it is characterized in that, also comprise fixed block, fork and movable part, described ratchet is fixed in described fixed block, described ratchet is fixed in described fork, described fork and described movable part are rotationally connected, described movable part and described ratchet are rotationally connected and can drive described fork and rotate around the axis of described ratchet, described ratchet also comprises at least one the location teeth groove along described circle distribution, described location teeth groove and described ratchet coupling, and the shape of described location teeth groove and unidirectional teeth groove is different, when described ratchet moves to described location teeth groove, the described ratchet of described location teeth groove locking and positioning.
5. ratchet and pawl arrangement as claimed in claim 4, it is characterized in that, described location teeth groove and unidirectional teeth groove all have the first groove face and the second groove face that sets gradually at described forward, described the first groove face and the second groove face arrange in opposite directions, and the top of the second groove face of described location teeth groove tilts to described the first groove face.
6. ratchet and pawl arrangement as claimed in claim 5 is characterized in that, the second groove face of described unidirectional teeth groove is the inclined-plane, and the first groove face of described unidirectional teeth groove and the second groove face formation V-type.
7. such as the described ratchet and pawl arrangement of any one among the claim 4-6, it is characterized in that, also comprise ratchet fixed base and elastic reset spare, described fork is rotationally connected by described ratchet fixed base and described movable part, described fork and described ratchet fixed base are slidingly matched, and the two ends of described return unit compress respectively described ratchet fixed base and fork, and described ratchet slides between engaging position and disengaging configuration, when the engaging position, described ratchet and described unidirectional teeth groove or location teeth groove engagement; When the disengaging configuration, described ratchet withdraws from described unidirectional teeth groove or location teeth groove; Described ratchet is positioned at described engaging position when initial, described return unit can be reset to the engaging position with described ratchet self-separation position.
8. ratchet and pawl arrangement as claimed in claim 7 is characterized in that, described ratchet has guiding surface, described guiding surface and the engagement of the second groove face; Described fork props up the lower to locking face of described ratchet when having for described ratchet reversing motion, the described lower below that is positioned at described guiding surface from locking face.
9. ratchet and pawl arrangement as claimed in claim 8, it is characterized in that described fork also has upper from locking face, the described upper top that is positioned at described guiding surface from locking face, described ratchet lock in place when the teeth groove of described location, the described upper notch edges that props up described location teeth groove from locking face.
10. ratchet and pawl arrangement as claimed in claim 8 is characterized in that, also comprises handle, and described ratchet is located at the front end of described fork, and described handle is fixed in the rear end of described fork.
11. an operation table is characterized in that: comprise such as the described ratchet and pawl arrangement of any one among the claim 4-6.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220320421 CN202746532U (en) | 2012-07-03 | 2012-07-03 | Ratchet wheel, ratchet-pawl mechanism and operation bed comprising same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220320421 CN202746532U (en) | 2012-07-03 | 2012-07-03 | Ratchet wheel, ratchet-pawl mechanism and operation bed comprising same |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202746532U true CN202746532U (en) | 2013-02-20 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220320421 Expired - Lifetime CN202746532U (en) | 2012-07-03 | 2012-07-03 | Ratchet wheel, ratchet-pawl mechanism and operation bed comprising same |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202746532U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103876904A (en) * | 2014-04-04 | 2014-06-25 | 迈柯唯医疗设备(苏州)有限公司 | Hidden hand plate structure |
-
2012
- 2012-07-03 CN CN 201220320421 patent/CN202746532U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103876904A (en) * | 2014-04-04 | 2014-06-25 | 迈柯唯医疗设备(苏州)有限公司 | Hidden hand plate structure |
| CN103876904B (en) * | 2014-04-04 | 2017-02-15 | 迈柯唯医疗设备(苏州)有限公司 | Hidden hand plate structure |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130220 |
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| CX01 | Expiry of patent term |