TWM539044U - Screw fixture - Google Patents

Description

Screw clamp

The present invention relates to a clamp, and more particularly to a screw clamp for fixing a screw.

Referring to Fig. 1, a nut detecting tool disclosed in Japanese Patent No. I513955 includes a rotating rod 8, and an external thread portion 7 coaxially disposed on one end of the rotating rod 8 and provided with a threaded portion. The external thread portion 7 has a starting end 71 away from the rotating rod 8, and a terminating end 72 adjacent to the rotating rod 8. The outer diameter of the external thread portion is gradually expanded from the starting end 71 to the terminating end 72. When detecting, the nut to be detected (not shown) is first screwed to the externally threaded portion 7 by means of a screw lock until the nut is tightly screwed and fixed to a specific section of the externally threaded portion 7. Then, the end surface of the nut is detected through a detecting instrument to detect whether the axis of the internal thread of the nut is eccentric.

However, it takes at least 2 to 3 seconds to screw the nut to be tested through the screw lock, which is quite time consuming, so that the nut detecting tool can only be used for random sampling in the process of continuously manufacturing a large number of screws. Testing, so existing nut detection tools still need to be improved.

Accordingly, it is an object of the present invention to provide a screw clamp that improves at least one of the disadvantages of the prior art.

Thus, the novel screw clamp is adapted to be provided with a screw member having an internal threaded portion defining a threaded bore, the screw clamp comprising a receiving tube and an adjustment mechanism. The receiving tube includes a reduced diameter pipe body extending along a central axis, the reduced diameter pipe body having an externally threaded portion, a driven portion located below the externally threaded portion, and a plurality of sections being cut downward from the top end of the externally threaded portion Cutting into the section of the driven portion, the reducing tube is defined by the dividing grooves into a plurality of offset walls spaced apart from each other. The adjusting mechanism can drive the offset walls to be radially displaced via the driven portion of the reducer body, so that the reducer body changes between an outer tension state and a retracted state with respect to the central axis. In the outer tension state, the external thread portion of the reducer body is screwed correspondingly to the internal thread portion of the screw member, and in the retracted state, the offset wall is driven by the adjustment mechanism to the central axis Radially biased, the externally threaded portion is reduced in diameter and not screwed to the screw.

The utility model has the advantages that the outer diameter of the external thread portion can be quickly adjusted through the matching design of the receiving tube and the adjusting mechanism, so that the receiving tube can be quickly loaded and unloaded by the screw.

Before the present invention is described in detail, it should be noted that in the following description, similar elements are denoted by the same reference numerals.

Referring to Figures 2, 3 and 4, the first embodiment of the novel screw clamp is adapted to be provided with a screw member 900 having an internal thread portion 902 defining a screw hole 901. In the present embodiment, the screw member 900 is exemplified by a nut, but in practice, the screw member 900 having the female screw portion 902 can be applied, for example, a bottle cap or the like, and is not limited to the embodiment. The screw clamp comprises a receiving tube 1, an adjusting mechanism 2, and a carrying mechanism 3.

The receiving pipe 1 extends in a long circular tubular shape along a central axis L and includes a base pipe body 11 and a reduced diameter pipe body 12 extending upward from the base pipe body 11. The outer diameter of the reduced diameter pipe body 12 is the same as the inner diameter of the internal thread portion 902 of the screw to be tested, and has an external thread portion 14 and a driven portion 15 located below the external thread portion 14. A socket portion 16 interposed between the male screw portion 14 and the driven portion 15 and four slit grooves 17 which are cut downward from the top end of the male screw portion 14 to the driven portion 15. The external thread portion 14, the driven portion 15 and the socket portion 16 are arranged along the central axis L.

The socket portion 16 has a small diameter pipe section 161 located above, a large pipe diameter section 162 located below and a pipe diameter larger than the pipe diameter of the small pipe diameter section 161, and a downward diameter gradually decreases from the small pipe diameter section 161 The diameter extension extends and connects the limiting shoulder section 163 of the large diameter section 162. The split grooves 17 extend radially inwardly and outwardly, and the reducer body 12 is divided to define four offset walls 18 that are spaced apart from one another.

The adjusting mechanism 2 includes a mounting seat 21, a rotating seat 22 rotatably disposed on the mounting seat 21, a wheel base 23 located above the rotating base 22 and fixedly mounted on the mounting seat 21, and four rotatable The yoke 24 is mounted on the wheel base 23 and angularly spaced around the central axis L, and a drive unit 25 that drives the rotary base 22 to rotate. The rotating base 22 has a receiving groove 221 extending downward from the top surface and fixedly inserted into the base pipe body 11. The wheel base 23 has a through hole 231 penetrating vertically and correspondingly for the driven portion 15, and an inner ring groove 232 radially surrounding the through hole 231.

The yoke 24 is mounted and positioned in the inner ring groove 232 and partially protrudes into the through hole 231 to surround the periphery of the driven portion 15. In this embodiment, each yoke 24 can be along a vertical axis. The core rotates and has a shaft 241 that is vertically fixed to the top end of the rotating base 22 and protrudes into the inner ring groove 232, and a ball bearing 242 that is sleeved on the shaft 241, but Each of the yokes 24 can also be mounted to the inner ring groove 232 in such a manner as to be rotatable along a vertical axis, not limited to this embodiment. The drive unit 25 can be a motor or other component that can drive the rotation of the rotary base 22.

The carrier mechanism 3 includes a carrier member 31 sleeved on the socket portion 16 for receiving the screw member 900, and a buffer elastic member 32 sleeved on the sleeve portion 16. The carrier member 31 is slidable upwardly along the sleeve portion 16. The cushioning elastic member 32 is elastically supported between the carrier member 31 and the wheel housing 23, and is elastically pushed upwardly relative to the wheel housing 23 Carrier 31. In the present embodiment, the cushioning elastic member 32 is a compression spring, but it may be a rubber washer, a disc spring or the like, and is not limited to the embodiment.

Referring to FIG. 3 and FIG. 5, in the screw clamp of the present invention, the reducer body 12 can be pushed by the adjustment mechanism 2 with respect to the central axis L in an outer tension state as shown in FIG. And a change between the retracted states as shown in FIG. The following describes in detail the process of the screw clamp for quick loading and unloading of the screw 900:

Referring to FIG. 3, FIG. 4, FIG. 6 and FIG. 7, initially, the reducer body 12 is in the outer tension state. When the user wants to screw the screw member 900 to the external thread portion 14, the first The driving unit 25 drives the rotating base 22 to rotate the receiving tube 1 along the arrow direction A as shown in FIG. 4 until the receiving tube 1 rotates relative to the offset wheel 24 to the position shown in FIG. The dampers 24 are respectively pressed against the radially outer sides of the offset walls 18 of the receiving pipe 1, and since the dampers 24 are immovably mounted to the wheel base 23, the biases are forced The shifting wall 18 is yawed toward the central axis L, so that the diameter of the entire diameter-reducing tube body 12 is reduced to the retracted state, and the diameter of the threaded portion 14 is reduced to be smaller than that of the screw member 900. the inside diameter of. At this time, the screw 900 can be quickly placed on the reducer body 12 from the top to the bottom, and when the screw 900 is sleeved on the reducer body 12, it will sit against the carrier 31 and pass through. The height of the bearing member 31 is such that the screw member 900 is correspondingly sleeved on the external thread portion 14 . In addition, the cushioning elastic member 32 can also be used to buffer the impact force when the screw member 900 is nested downward. When the carrier 31 moves downward, it can also be abutted by the limiting shoulder section 163, and cannot continue to move downward.

Then, the driving unit 25 is driven to drive the rotating base 22 to rotate the receiving tube 1 back to the position shown in FIG. 4, so that the offset wheels 24 respectively correspond to the dividing grooves 17 of the receiving tube 1. The offset wall 18 is no longer pressed against the offset wall 18, and the offset walls 18 are elastically oscillated and reset in the radial direction, so that the dampers 24 are respectively embedded in the equally spaced grooves 17, so that the diameter is reduced. The tubular body 12 is switched to the outer tension state, and the diameter of the threaded portion 14 is restored to the size matching the inner diameter of the screw member 900, and the screw member 900 is screwed and fixed, and then the user can The screw 900 is detected by a detecting instrument. When the detection is completed, the adjustment mechanism 2 is driven again to drive the rotating base 22 to rotate the receiving tube 1 to the retracted state, and the screw 900 can be quickly taken up and placed into the next snail to be tested. Piece 900.

It should be noted that, in other embodiments of the present invention, the screw clamp can also omit the bearing mechanism 3. For example, a flange can be designed on the external thread portion 14 for the screw 900 to sit. The positioning of the bearing mechanism 3 and the socket portion 16 is omitted, and the screw 900 is directly seated on the rotating base 23, which is not limited to the embodiment.

In addition, in another embodiment of the present invention, the number of the dividing grooves 17 may be three or more, and a corresponding number of offset walls 18 may be cut out, and the offset wheels 24 are The number may be correspondingly set according to the number of the offset walls 18, or may be less than the number of the offset walls 18, and is not limited to the embodiment.

It is worth mentioning that in other embodiments of the present invention, the relative rotation between the damper 24 and the receiving tube 1 can also be reversed, that is, the receiving tube 1 is fixed and the wheel is fixed. The seat 23 is designed to be driven by the drive unit 25 to rotate the yoke 24 relative to the yoke 1 and to drive the radial offset of the offset walls 18.

In summary, the screw clamp of the present invention can quickly adjust the outer diameter of the external thread portion 14 through the matching design of the receiving tube 1 and the adjusting mechanism 2, so that the receiving tube 1 can be quickly used for the screw 900. The loading and unloading of the ground is convenient for the inspection operation, so the purpose of the novel can be achieved.

Referring to FIG. 8 and FIG. 9, the second embodiment of the present invention relates to the second embodiment. The difference between the second embodiment and the first embodiment is that the adjustment mechanism 4 drives the reducer body 12 in the external state and the different manner. Changes between retracted states. For convenience of explanation, only the differences between the present embodiment and the first embodiment will be described below.

In the present embodiment, the outer diameter of the driven portion 15 is gradually expanded from top to bottom. The adjusting mechanism 4 includes a mounting seat 41, a moving base 42 that is vertically movably disposed on the mounting seat 41, an over-pressing seat 43 located above the moving base 42 and fixedly mounted to the mounting seat 41, and an The return elastic member 44 between the moving seat 42 and the pressing seat 43 and an pushing unit 45 for pushing the moving seat 42 upward. The moving base 42 has a receiving groove 421 extending downward from the top surface thereof and fixedly inserted into the base pipe body 11. The pressing seat 43 has a through hole 431 for the corresponding receiving portion 15 to be bored. The hole 431 has a hole diameter which is gradually enlarged from top to bottom. The return elastic member 44 is constantly pushed downward against the movable seat 42 with respect to the pressing seat 43. The pushing unit 45 can be a generally existing pneumatic cylinder or hydraulic cylinder, and can be driven by a high pressure gas or liquid to push the moving base 42.

In use, the reducer body 12 can be pushed by the adjustment mechanism 4 along the central axis L, in the outer tension state as shown in FIG. 8, and the displacement change between the retracted states as shown in FIG. . In the retracted state, the pushing unit 45 protrudes upwardly to push the moving seat 42 to interlock the upward movement of the receiving tube 1, so that the return elastic member 44 is compressed by the moving seat 42 to accumulate elastic restoring force, and The pressing seat 43 is relatively forced to the driven portion 15 of the receiving pipe 1, and the offset wall 18 is biased toward the central axis L, whereby the diameter of the threaded portion 14 can be reduced.

When the pushing unit 45 is retracted, the rest elastic member 44 simultaneously releases the accumulated elastic restoring force, so that the moving seat 42 drives the receiving tube 1 to move downward and return to the original position, and the receiving tube 1 is The biasing portion 15 is disengaged from the pressing seat 43 to allow the offset wall 18 to be elastically swinged outwardly, so that the reducing tube body 12 is switched to the outer tension state.

In another embodiment of the present invention, the relative movement between the pressing seat 43 and the receiving tube 1 can also be reversed, that is, the receiving tube 1 is a fixed design, and the pressing seat 43 is designed as It is driven by the pushing unit 45 to move up and down with respect to the receiving tube 1. In this way, the function of forcing the offset wall 18 to be deflected by the pressing seat 43 can also be achieved, which is not the embodiment. Limited.

Referring to FIG. 10, the third embodiment of the present invention is different from the first embodiment in that the adjustment mechanism 5 drives the reducer body 12 in the externally stretched state and the retracted state in different manners. Change between.

In the present embodiment, the receiving pipe 1 does not include the base pipe body, and the number of the dividing grooves 17 is only three, and extends from the top end of the receiving pipe 1 to the bottom end. The adjustment mechanism 5 includes a plurality of sliding units 51 respectively corresponding to the offset walls 18, each of the sliding units 51 including a rail 511 extending radially relative to the receiving tube 1, a slidably mounted to the rail The rail 511 is coupled to the shifting block 512 of the respective offset wall 18, and a drive module 513 for driving the shifting block 512 to slide. Each of the driving modules 513 can be a conventional pneumatic cylinder or a hydraulic cylinder, and is fixed to an object (not shown) and then driven by high pressure gas or liquid to push the respective transfer seats 512. Each of the sliding units 51 is a linear slide design, and since it is a conventional technique, it will not be described herein.

When each of the driving modules 513 drives the respective shifting blocks 512 to slide toward the central axis L, the offset walls 18 are caused to be offset toward the central axis L, thereby allowing the tubes of the threaded portions 14 to be The diameter is reduced to change the reducer body 12 to the retracted state. When each of the driving modules 513 drives the respective shifting blocks 512 to slide away from the central axis L, the offset walls 18 are caused to be offset from the central axis L until the threads of the threaded portions 14 are Corresponding to the screw, the reducer body 12 is switched to the outer tension state.

In summary, it can be seen from the above embodiments that there are many ways to drive the offset walls 18 to be radially offset. Therefore, as long as the expansion tube body 12 can be in the outward state with respect to the central axis L, The change between the retracted states and the outer diameter of the externally threaded portion 14 can be quickly adjusted, so that the function of quickly loading and unloading the screw can be achieved, and is not limited to the structural design of the above embodiments. In application, the screw clamp can be applied to various occasions such as painting, detecting, scanning or turning, which need to position the screw for subsequent operation, so the purpose of the present invention can be achieved.

However, the above is only the embodiment of the present invention, and when it is not possible to limit the scope of the present invention, all the simple equivalent changes and modifications according to the scope of the patent application and the contents of the patent specification are still This new patent covers the scope.

1‧‧‧Acceptance
11‧‧‧Base tube body
12‧‧‧Shrinking body
14‧‧‧External thread
15‧‧‧Received Department
16‧‧‧ Sockets
161‧‧‧Small diameter section
162‧‧‧ Large diameter section
163‧‧‧Limited shoulder
17‧‧‧"
18‧‧‧Offset wall
2‧‧‧Adjustment agency
21‧‧‧ Mounting
22‧‧‧ Rotating seat
221‧‧‧容管槽
23‧‧·wheel seat
231‧‧‧Perforation
232‧‧‧ Inner ring groove
24‧‧‧Round
241‧‧‧ shaft
242‧‧‧Ball bearings
25‧‧‧Drive unit
3‧‧‧Loading mechanism
31‧‧‧ Carrier
32‧‧‧ cushioning elastic parts
4‧‧‧Adjustment agency
41‧‧‧ Mounting
42‧‧‧Mobile seat
421‧‧‧容管槽
43‧‧‧Cruise seat
431‧‧‧Perforation
44‧‧‧Reset elastic parts
45‧‧‧Pushing unit
5‧‧‧Adjustment agency
51‧‧‧Slip unit
511‧‧‧ rails
512‧‧‧Transfer
513‧‧‧Drive Module
900‧‧‧ screw
901‧‧‧ screw hole
902‧‧‧Threaded Department
A‧‧‧ arrow direction
L‧‧‧ center axis

Other features and effects of the present invention will be apparent from the following description of the drawings, wherein: Figure 1 is a conventional nut detection tool; Figure 2 is an exploded perspective view of the novel screw clamp 1 is a cross-sectional side view showing the first embodiment in an outer tension state; and FIG. 4 is a cross-sectional view taken along line 4-4 of FIG. 3, illustrating the first embodiment. Figure 5 is a cross-sectional side view showing the first embodiment in a retracted state; Figure 6 is a cross-sectional view taken along line 6-6 of Figure 5, illustrating the An embodiment is in the retracted state; FIG. 7 is a flow chart showing the operation of the first embodiment for quick loading and unloading of the screw; FIG. 8 is a cross-sectional side view showing the second of the novel screw holder The embodiment is in an outer tension state; FIG. 9 is a cross-sectional side view showing the second embodiment in a retracted state; and FIG. 10 is a partial perspective view showing the third embodiment of the novel screw clamp in a Outer state.

1‧‧‧Acceptance

11‧‧‧Base tube body

12‧‧‧Shrinking body

14‧‧‧External thread

15‧‧‧Received Department

16‧‧‧ Sockets

17‧‧‧"

18‧‧‧Offset wall

23‧‧·wheel seat

231‧‧‧Perforation

24‧‧‧Round

241‧‧‧ shaft

242‧‧‧Ball bearings

3‧‧‧Loading mechanism

31‧‧‧ Carrier

32‧‧‧ cushioning elastic parts

2‧‧‧Adjustment agency

21‧‧‧ Mounting

22‧‧‧ Rotating seat

221‧‧‧容管槽

900‧‧‧ screw

901‧‧‧ screw hole

902‧‧‧Threaded Department

Claims (8)

A screw clamp suitable for a screw sleeve having an internal thread portion defining a threaded hole, the screw clamp comprising: a socket tube including a diameter extending along a central axis a tubular body having an externally threaded portion, a driven portion located below the externally threaded portion, and a plurality of slits that are cut downward from the top end of the externally threaded portion to the driven portion, the reducer The body is divided by the dividing grooves into a plurality of offset walls spaced apart from each other and distributed around the central axis; and an adjusting mechanism for driving the offset walls to be radially offset via the driven portion of the reducing tube body, so that The reducer body changes between an outer tension state and a retracted state with respect to the central axis, and in the outer tension state, the external thread portion of the reducer body corresponds to the internal thread portion of the screw In the retracted state, the offset walls are driven by the adjusting mechanism and are radially biased toward the central axis, so that the externally threaded portion is reduced in diameter and is not screwed to the screw. The screw clamp of claim 1, wherein the adjustment mechanism comprises a plurality of spacers disposed around the periphery of the driven portion, and a urging member for driving the receiving tube and the rotator to rotate relative to the central axis. The slewing unit is respectively embedded in the slanting grooves when the outer sliding state is driven, and the slewing unit drives the receiving tube to rotate relative to the damper wheels to disengage the repulsion wheels When the grooves are dissected, the offset wheels respectively force the offset walls to elastically yaw toward the central axis to change the reducer body to the retracted state. The screw clamp of claim 1, wherein the reducer body further has a socket portion between the external thread portion and the driven portion, the screw clamp further comprising a bearing mechanism, the bearing mechanism The utility model comprises a bearing member sleeved on the socket portion for seating the screw member disposed on the external thread portion, and a sleeve is sleeved on the socket portion and is elastically pushed upwardly against the bearing member The cushioning elastic member of the piece. The screw clamp according to claim 3, wherein the socket portion has a small diameter section, a large diameter section below the small diameter section and a diameter larger than the diameter of the small diameter section, and a limiting shoulder section extending from the small diameter section to the large diameter section and connecting the large diameter section, when the carrier moves downward, the limiting shoulder section can be abutted and cannot continue downward mobile. The screw clamp of claim 2, wherein the receiving tube further comprises a base pipe body extending downward from the reducer body, the adjustment mechanism further comprising a mounting seat and a rotatably disposed on the mounting a rotating seat of the seat, and a wheel base fixed above the rotating seat and fixedly mounted on the mounting seat, the rotating base has a receiving pipe slot extending downward from the top surface thereof for fixing the base pipe body The wheel base has a through hole penetrating vertically and downwardly for inserting the base pipe body into the receiving pipe groove and accommodating the driven portion, and an inner ring groove surrounding the through hole, the rotator wheel being rotatably mounted and positioned The wheel base is located in the inner ring groove and radially protrudes into the through hole to abut the driven portion, and the driving unit can drive the rotating base to rotate the receiving tube relative to the abutting wheel. The screw clamp according to claim 1, wherein the driven portion is gradually extended from the top to the bottom, the adjusting mechanism includes an overcrowding seat surrounding the driven portion, and one of the driven portions can drive the receiving tube and the squeeze Pushing up and down the relative pushing unit, when the pushing unit drives the receiving tube to move relative to the pressing seat, the pressing seat is relatively radially forced to the receiving portion, and the offset wall is forced The center axis is elastically biased to change the reducer body to the retracted state. The screw clamp according to claim 6, wherein the receiving tube further comprises a base pipe body extending downward from the reducer pipe body, the adjusting mechanism further comprising a mounting seat, and a vertically movable portion a movable seat of the mounting seat, and a reset elastic member fixed to the mounting seat, and having a through hole which is gradually expanded from the top to the bottom and correspondingly inserted by the driven portion, the movable seat is located at the squeeze Underneath the seat, and having a receiving tube groove extending downwardly from the top surface thereof and fixedly inserted into the base tube body, the return elastic member is interposed between the moving seat and the pressing seat, and is opposite to the squeeze The pressing seat elastically pushes against the moving seat, and the pushing unit can push the moving base to move the connecting tube relative to the pressing seat. The screw clamp of claim 1, wherein the adjustment mechanism comprises a plurality of sliding units respectively corresponding to the offset walls, each of the sliding units including a rail extending radially with respect to the receiving tube, and a a shifting mount slidably mounted to the rail and coupled to the respective offset wall, and a drive module for driving the shifting seat to slide, each drive module driving a respective shift When the seat slides toward the central axis, the respective offset walls are displaced toward the central axis to change the reducer body to the retracted state.