TWM540946U - Support device for screw pretension - Google Patents

Description

Support device for pre-tensioning of screw

The present invention relates to a support device, and more particularly to a support device for pre-tensioning of a screw.

The so-called screw pre-drawing process uses the locking nut at both ends of the screw during assembly to apply a certain pulling force to the rod axis direction of the screw, so as to adjust the reverse tightness of the screw forward and reverse nuts, because the screw is in operation. At temperature rise, the thermal stress effect causes the screw to elongate, making the length of the screw unstable; a further objective is to effectively eliminate the thermal elongation variable of the part in order to obtain smooth motion accuracy.

However, in the screw pre-drawing procedure, when the screw is too long, the screw is often often bent downwards into a concave shape in the middle portion during the pre-tensioning, so that the flat state cannot be maintained, and the diameter is affected. One of the problems that the ordinary knowledge of the technical field is urgently to solve is that the pre-pull effect is not good when the correction is performed, which affects the accuracy of the subsequent processing steps.

The reason is that the purpose of the present invention is to provide a supporting device for pre-tensioning of the screw, thereby improving the pre-tensioning effect.

The supporting device for pre-pulling of the screw is suitable for being assembled between a working table having a working plane and a screw, and mainly comprises: a supporting seat disposed between the working table and the screw, and a base portion, and a bearing portion disposed on the base portion for supporting the screw; a wear-resistant unit disposed between the bearing portion and the screw; an adjusting unit rotatably screwed on the support base, and There is a lifting portion that penetrates the base portion and drives the base portion to reciprocate up and down, and a driving portion that connects the lifting portion and drives the lifting portion to rotate. The lifting portion further has a horizontal end surface that abuts against the working plane.

Preferably, the carrying portion is a groove having a notch opposite to the base, wherein an inner groove surface of the groove is tangent to a circumferential surface of the rod of the screw rod.

Preferably, the slot diameter of the groove is larger than the rod diameter of the screw.

Preferably, the adjusting unit is composed of a plurality of rod screws, wherein each of the screws is rotatably inserted in a corresponding screw hole in the base portion in the direction of the rod axis, and has a shaft axis direction A threaded section having one end and serving as the lifting portion, and a screw head provided at the other end of the rod axis direction as the driving portion.

If so, the support device can achieve the effect of the new pre-tensioning effect.

The foregoing and other technical aspects, features and advantages of the present invention will be apparent from

Referring to FIG. 1 to FIG. 3, a preferred embodiment of the support device for pre-tensioning of the screw of the present invention provides a user to assist the support of the middle portion of the screw 12 with its own weight when performing the pre-pull screw process. The supporting device is configured to be disposed between a table 11 having a working plane 111 and a screw 12, the supporting device mainly comprising: a supporting base 20 and a wear-resistant unit 30. An adjustment unit 40.

The support base 20 is disposed between the table 11 and the screw 12, and has a base portion 21 and a bearing portion 22 disposed on the base portion 21 for supporting the screw 12; in this embodiment, the support portion 22 The base portion 21 is in the form of a flat plate for receiving the bearing portion 22; and the bearing portion 22 is a groove having a notch opposite to the base portion 21, wherein the inner groove surface 221 of the groove and the screw 12 The rod edge 121 is tangent to the rod edge; further, referring to FIG. 4, the groove diameter L1 of the groove is larger than the rod diameter L2 of the screw, so that the screw 12 is constrained and fixed to the bearing portion 22 It will not slip in the direction of the 12-axis of the screw, which will cause the subsequent processing steps to be out of alignment.

The wear-resistant unit 30 is disposed between the bearing portion 22 and the screw 12; in the embodiment, the wear-resistant unit 30 is attached to both sides of the inner groove surface 221 of the bearing portion 22 by two pieces. The anti-abrasive sheet of the Tekai material, which is sandwiched between the screw 12 and the inner groove surface 221 of the carrying portion 22, wherein the anti-wear sheet named Tekai is disposed to prevent contact with the screw 12 having high precision requirements. The bearing portion 22 rubs, causing damage to the surface of the screw 12, thereby affecting the accuracy of subsequent processing.

The adjusting unit 40 is rotatably screwed to the support base 20, and has a lifting portion 42 that penetrates the base portion 21 and drives the base portion 21 to reciprocate up and down, and a connecting portion of the lifting portion to rotate the lifting portion 42. The driving portion 41, wherein the lifting portion 42 has a horizontal end surface 404 that abuts against the working plane 11; in the embodiment, the adjusting unit 40 is composed of four rod screws 401, wherein each The rod-shaped screw 401 is rotatably inserted in the corresponding screw hole 211 of the base portion 21 in the direction of the rod axis, and has a threaded section 402 which is provided at one end of the rod axial direction and serves as the lifting portion 42. The other end of the rod axis direction serves as a screw head 403 of the driving portion 41.

The above description is the structure of each main component of the creation embodiment and its configuration description. The following describes the mode of operation and effectiveness of this creation.

In the preferred embodiment, the user rotates the screw heads 403 by clockwise or counterclockwise, thereby driving the base portion 21 of the support base 20 to move up and down along the protruding thread slopes of the thread segments 402. Thereby, the distance between the bearing portion 22 and the screw 12 is adjusted and pressed to achieve the purpose of supporting the screw 12 in the direction perpendicular to the rod axis of the screw 12, such as providing a force perpendicular to the screw 12 and opposite to the direction of gravity. The effect of balancing the vertical component of the screw 12 is achieved, which in turn greatly contributes to the pre-tensioning effect of the screw 12 when it is biased in the horizontal direction.

11‧‧‧Workbench
111‧‧‧Working plane
12‧‧‧ screw
121‧‧‧Rouge
20‧‧‧ support
21‧‧‧ base
211‧‧‧ screw holes
22‧‧‧Loading Department
221‧‧‧ inside groove surface
30‧‧‧Abrasion unit
40‧‧‧Adjustment unit
401‧‧‧ rod screws
402‧‧‧Threaded section
403‧‧‧ screw head
404‧‧‧ horizontal end face
41‧‧‧ Drive Department
42‧‧‧ Lifting Department
L1‧‧‧ notch caliber
L2‧‧‧ rod diameter

1 is a perspective exploded view of a preferred embodiment of the present invention. 2 is a perspective view of a preferred embodiment of the present invention. Figure 3 is a side elevational view of the embodiment of the preferred embodiment of the present invention. Figure 4 is a cross-sectional view showing the state of implementation of a preferred embodiment of the present invention.

111‧‧‧Working plane

12‧‧‧ screw

121‧‧‧Rouge

20‧‧‧ support

21‧‧‧ base

211‧‧‧ screw holes

22‧‧‧Loading Department

221‧‧‧ inside groove surface

30‧‧‧Abrasion unit

401‧‧‧ rod screws

402‧‧‧Threaded section

403‧‧‧ screw head

404‧‧‧ horizontal end face

41‧‧‧ Drive Department

42‧‧‧ Lifting Department

L1‧‧‧ notch caliber

L2‧‧‧ rod diameter

Claims (4)

The utility model relates to a supporting device for pre-tensioning of a screw, which is suitable for being assembled between a working table having a working plane and a screw. The supporting device for pre-pulling of the screw comprises: a supporting seat disposed on the working table and the screw And a base portion, and a bearing portion disposed at the base portion for supporting the screw; a wear-resistant unit disposed between the bearing portion and the screw; an adjusting unit rotatably screwed on the a support base having a lifting portion that penetrates the base portion and drives the base portion to reciprocate up and down, and a driving portion that connects the lifting portion and drives the lifting portion to rotate, wherein the lifting portion has a level that abuts against the working plane End face. The support device of the pre-tensioning of the screw according to claim 1, wherein the bearing portion is a groove having a notch opposite to the base, wherein an inner groove surface of the groove is tangent to a circumferential surface of the rod of the screw rod . The support device for pre-tensioning of the screw according to claim 2, wherein the notch of the groove is larger than the rod diameter of the screw. The support device of the pre-tensioning of the screw according to claim 1, wherein the adjusting unit is composed of a plurality of rod screws, wherein each of the screws is rotatably inserted in the rod axis direction with a corresponding screw on the base. The hole has a threaded portion provided at one end of the rod axial direction as the lifting portion, and a screw head provided at the other end of the rod axial direction as the driving portion.