CN205918859U - Modified lead screw subassembly - Google Patents
Modified lead screw subassembly Download PDFInfo
- Publication number
- CN205918859U CN205918859U CN201620799983.4U CN201620799983U CN205918859U CN 205918859 U CN205918859 U CN 205918859U CN 201620799983 U CN201620799983 U CN 201620799983U CN 205918859 U CN205918859 U CN 205918859U
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- China
- Prior art keywords
- nut
- groove
- trocar sheath
- drive nut
- lead screw
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Abstract
The utility model belongs to the technical field of the lead screw technique and specifically relates to a modified lead screw subassembly, offering the nut retaining ring of bayonet socket, lead screw, stroke position sleeve, offering the drive nut of at least one draw -in groove and place the inclined plane bayonet lock and the pressure spring of drive nut draw -in groove in along the axial on the outer wall including the one end of outer tube, nearly nut, the stroke position sleeve is installed at the lead screw both ends, and the drive nut cover is established and is being lain in two lead screws between the stroke position sleeve, and the two nuts retaining ring is during with the drive nut centre gripping and inlay the intraductal one end of establishing at the outer tube, its characterized in that: the outer wall at the nearly middle part of nut retaining ring set up a recess along the circumference, with the recess correspond on the pipe wall of the outer tube of position department with the recess establish two punching press points at least and carry out stamping connection. Compared with the prior art, the utility model, structural design rationally ingenious, processing is convenient, manufacturing process is simple, has also avoided that the material variability that welding high temperature leads to and rosin joint, dummy solder joint's etc. Is not enough simultaneously.
Description
Technical field
This utility model is related to screw mandrel technical field, specifically a kind of improved screw component.
Background technology
At present, most of medical bedstead still leans on driven by shaking both at home and abroad, as shown in figure 1, during swinging handle, screw mandrel rotates institute
The axial driving force producing, is applied to drive nut by screw mandrel, then is transmitted driving force by drive nut by drive nut
To trocar sheath, thus driving the integral elevating of the back of the body of bed, foot deck or bed.Therefore drive rod is the important portion that medical bedstead produces
Part, and consumption is very huge.It is the schematic diagram of drive rod shown in Fig. 2, mainly include Handleset 1 and screw component 4, by
Holder assembly 3 and bed frame assembly 2 is supported to be installed on bed frame, wherein the relative structure of screw component 4 is complex and manufactures
Operation is more, and therefore people have made many Improvements to its structure and manufacture method.
Referring to Fig. 3～Fig. 5, it is a kind of structural representation of the screw component of existing drive rod.Mainly it is provided with by two ends
The screw mandrel 5 of stroke positioning sleeve 6, be installed in stroke position inner room drive nut 11, on the outer wall of drive nut 11 vertically extremely
It is provided with a draw-in groove less, stage clip 15 and inclined-plane bayonet lock 14 are placed in draw-in groove；Projection in both sides nut sleeve 13 is by drive nut 11
And during adnexa contains, left and right two nut sleeve 13 is integrally formed by hickey, or is equiped with anti-loosening part again；Right side
The bore corresponding with trocar sheath 9 is made in nut sleeve 13 outer end, and connects as one by the method for welding.Due to nut sleeve 13
It is to be processed into by metal bar material or thick-walled pipe truck, supplies consumption is many, particularly with the tube wall of trocar sheath 9 with manufacturing procedure
Periphery welding bothers very much, and scrap rate is very high, and therefore comprehensive manufacturing cost is larger.
Shown in Figure 7, it is a kind of Optimal improvements structure of the prior art, the part such as screw mandrel 5, drive nut 11 is direct
It is placed in the one end in trocar sheath 9；Referring to Fig. 6, one end of two nearly drive nuts 11 offers the nut back-up ring 16 of bayonet socket 16.1
It is clamped in the both sides of drive nut 11, the tube wall of trocar sheath 9 at each nut back-up ring 16 corresponding circumferentially at least opens up two
Individual welding hole is welded and fixed.Referring to Figure 14, it is higher that the improving and optimizating of this structure decreases manufacturing cost with respect to the structure shown in Fig. 3
Nut sleeve 13, and substituted by the little nut back-up ring 16 of simple processing, materials, and eliminate nut sleeve 13 and trocar sheath 9
Periphery welding sequence.But this structure still feels to exist many deficiencies aborning, one be punch on trocar sheath 9 and welding,
And the tedious process such as after welding baking vanish, reassemble；Two is that the high temperature welding can lead to drive nut 11 grade component materials to deform；
Three is that the situations such as rosin joint, dry joint occurs；Four is that necessary grinding process in welding position surface etc. is many bothers.Particularly client will
When seeking trocar sheath 9 material selection stainless steel tube, cannot weld with the unlike material of nut back-up ring 16.
In order to deduct welding procedure, also once attempted boring several fixing holes in nut back-up ring 16, by the tube wall of trocar sheath 9
Pressurized is dashed forward to fixing in the hole although reliable fixing effect can be reached, but enables in implementing and accomplish precisely to punch,
It also is difficult to during pressure position, operation has many troubles.
Content of the invention
The purpose of this utility model is to overcome the deficiencies in the prior art, provides one kind not only simple but also cleverly innovative design,
So that it is guaranteed that production efficiency is high, low cost of manufacture, reliability best in quality, for having the medical care bed industry of huge social need
The screw component of super quality and competitive price is provided.
To achieve these goals, design a kind of screw component, the one end including trocar sheath, nearly nut offers bayonet socket
Nut back-up ring, screw mandrel, stroke positioning sleeve, offer the drive nut of at least one draw-in groove on the outer wall vertically and be placed in
Inclined-plane bayonet lock in drive nut draw-in groove and stage clip, stroke positioning sleeve is installed in screw mandrel two ends, and drive nut is set in positioned at two
On screw mandrel between individual stroke positioning sleeve, drive nut clamping therebetween and is embedded in the pipe of trocar sheath by two nut back-up rings
One end it is characterised in that: the outer wall at the nearly middle part of described nut back-up ring circumferentially arranges a groove, with described groove correspondence position
At least set two punching press points with described groove on the tube wall of trocar sheath at place and carry out stamping connection.
Circumferentially it is used for checking and approving recessed on the tube wall of the trocar sheath of groove of corresponding two nut back-up rings at least provided with one
The sight vane of groove location.
It is in vertically respectively on two phase inward wall of described groove at corresponding punching press point and on the trocar sheath of corresponding position
Depression.
Compared with the existing technology, reasonable in design is ingenious, easy to process, manufacturing process simple, especially for this utility model
It is to eliminate the complicated procedures of forming such as punching in prior art, welding, polishing, easily realize production line balance, drastically increase life
Produce efficiency, also correspondingly reduce production cost；It also avoid welding material modification and rosin joint, the dry joint that high temperature leads to simultaneously
Deng deficiency, improve the quality of product.
Brief description
Fig. 1 is the structural representation of the medical bedstead being equipped with original structure screw component.
Fig. 2 is the structural representation of the drive rod being equipped with original structure screw component.
Fig. 3 is original screw component sectional view.
Fig. 4 is the partial enlarged drawing shown in Fig. 3.
Fig. 5 is the three-dimensional structure diagram of original drive nut being equipped with inclined-plane bayonet lock and stage clip.
Fig. 6 is the partial sectional view of original nut back-up ring.
Fig. 7 is the fragmentary sectional view of original another kind screw component.
Fig. 8 is the structural representation of the nut back-up ring in this utility model.
Fig. 9 is trocar sheath in this utility model and the partial schematic diagram at nut back-up ring assembling.
Figure 10 is the partial schematic diagram that in this utility model, trocar sheath is assembled with nut back-up ring.
Figure 11 is subassembly structure sectional view of the present utility model.
Figure 12 is the partial schematic diagram of the trocar sheath being provided with punching press point in this utility model.
Figure 13 is the structural representation of the punching press point of trocar sheath in this utility model.
Figure 14 is the preparation process FB(flow block) of product shown in Fig. 7.
Figure 15 is the preparation process FB(flow block) of this utility model product.
Specific embodiment
In conjunction with accompanying drawing, the utility model is further described.
Embodiment 1
Referring to Fig. 8～Figure 13, a kind of screw component of this utility model, the one end including trocar sheath 9, nearly nut offers card
Mouthfuls 16.1 nut back-up ring 16, screw mandrel 5, stroke positioning sleeve 6, offer the driving spiral shell of at least one draw-in groove on the outer wall vertically
Female 11 and be placed in the inclined-plane bayonet lock 14 in drive nut 11 draw-in groove and stage clip 15, stroke positioning sleeve 6 is installed in screw mandrel 5 two ends,
Drive nut 11 is set on the screw mandrel 5 between two stroke positioning sleeves 6, and drive nut 11 is pressed from both sides by two nut back-up rings 16
Hold therebetween and be embedded one end in the pipe of trocar sheath 9 it is characterised in that: the outer wall at the described nearly middle part of nut back-up ring 16 is along circle
Week setting one groove 16.2, with the tube wall of the trocar sheath 9 of described groove 16.2 corresponding position on described groove 16.2 to
Set two punching press points less and carry out stamping connection.
Further, the tube wall of trocar sheath 9 at the groove 16.2 of corresponding two nut back-up rings 16 circumferentially at least sets
There is a sight vane for checking and approving groove position, be conveniently accurately positioned the groove location of nut back-up ring, it is to avoid stamping position goes out
Wrong.
Further, the trocar sheath 9 of on the two phase inward wall of described groove 16.2 at corresponding punching press point and corresponding position
Upper is in depression 9.3 vertically respectively.
Referring to Figure 15, describe the preparation method of screw component in this utility model in detail, it adopts following preparation process:
A, first setting groove on nut back-up ring 16；
B, inclined-plane bayonet lock 14, stage clip 15, another inclined-plane bayonet lock 14 are fitted in the draw-in groove of drive nut successively, then will
Stroke positioning sleeve 6, nut back-up ring 16, drive nut 11, another nut back-up ring 16, another stroke positioning sleeve 6 assembles successively
And put in trocar sheath；
The groove corresponding position of c, the tube wall in trocar sheath and nut back-up ring 16 at least two punching press points of punching press.
Of course for accurate positioning during punching press, can observe whether nut back-up ring 16 is rivals in a contest position by sight vane before stamping
Put.
Further, the power source of described punching press adopts hydraulic pressure or air pressure.
Further, the staking punch that described punching press is adopted be respectively provided on two sides with lateral projection, this two are laterally convex
Rising is that such trocar sheath 9, nut back-up ring 16 not only diametrically form punching press bump in order to set depression 9.3 use vertically, and
And also form punching press bump it is therefore prevented that trocar sheath 9, nut back-up ring 16 produce under twisting force gets loose in the axial direction.
Claims (3)
1. a kind of improved screw component, the one end including trocar sheath (9), nearly nut offers the nut back-up ring of bayonet socket (16.1)
(16), screw mandrel (5), stroke positioning sleeve (6), offer vertically on the outer wall at least one draw-in groove drive nut (11), with
And it is placed in the inclined-plane bayonet lock (14) in drive nut (11) draw-in groove and stage clip (15), stroke positioning sleeve (6) is installed in screw mandrel (5) two
End, drive nut (11) is set on the screw mandrel (5) between two stroke positioning sleeves (6), and two nut back-up rings (16) will
During drive nut (11) clamping and be embedded one end in the pipe of trocar sheath (9) it is characterised in that: described nut back-up ring
(16) outer wall at nearly middle part circumferentially arranges a groove (16.2), the trocar sheath (9) with described groove (16.2) corresponding position
Tube wall at least set two punching press points with described groove (16.2) and carry out stamping connection.
2. as claimed in claim 1 a kind of improved screw component it is characterised in that: corresponding two nut back-up rings (16) recessed
Circumferentially it is used for checking and approving the sight vane at groove position at least provided with one on the tube wall of trocar sheath (9) at groove (16.2) place.
3. as claimed in claim 1 a kind of improved screw component it is characterised in that: the described groove at corresponding punching press point
(16.2) it is in depression (9.3) vertically respectively on two phase inward wall and on the trocar sheath (9) of corresponding position.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620799983.4U CN205918859U (en) | 2016-07-27 | 2016-07-27 | Modified lead screw subassembly |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620799983.4U CN205918859U (en) | 2016-07-27 | 2016-07-27 | Modified lead screw subassembly |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205918859U true CN205918859U (en) | 2017-02-01 |
Family
ID=57872643
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620799983.4U Active CN205918859U (en) | 2016-07-27 | 2016-07-27 | Modified lead screw subassembly |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205918859U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107664186A (en) * | 2016-07-27 | 2018-02-06 | 上海品兴科技有限公司 | A kind of screw component and preparation method thereof |
-
2016
- 2016-07-27 CN CN201620799983.4U patent/CN205918859U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107664186A (en) * | 2016-07-27 | 2018-02-06 | 上海品兴科技有限公司 | A kind of screw component and preparation method thereof |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |