CN100460716C

CN100460716C - Adjustable type prepressing structure for ball screw

Info

Publication number: CN100460716C
Application number: CNB200510090370XA
Authority: CN
Inventors: 刘家铭; 林忠学
Original assignee: Hiwin Technologies Corp
Current assignee: Hiwin Technologies Corp
Priority date: 2005-08-16
Filing date: 2005-08-16
Publication date: 2009-02-11
Anticipated expiration: 2025-08-16
Also published as: CN1916442A

Abstract

An adjustable prepressing structure of ball-screw is prepared as forming said structure by at least two prepressing plate, setting one end surface of each prepressing plate to be slope surface in order to let each prepressing plate be jacketed separately between two nuts of ball-screw for making slope surface of each prepressing plate be mode of contacting with each other correspondingly.

Description

The adjustable type prepressing structure of ball screw

Technical field

The invention relates to a kind of adjustable type prepressing structure, more specifically it is meant the adjustable type prepressing structure relevant for a kind of ball screw especially.

Background technique

Ball screw is owing to have advantages such as transmission precision and transmission be certain, therefore often be widely used in the precision optical machinery, use the traversing or lifting of Control work platform, and it is in order to reach the purpose of eliminating back clearance, usually all a default pressure on nut on the structural design, as Fig. 1, shown in Figure 2, be the adjustable type prepressing structure of two kinds of common ball screws, its adjustable type prepressing first nut 10, second nut 11, the 3rd nut 12, the 4th nut 13 is not that to utilize screw thread 111 be exactly to utilize first screw 14 to adjust first nut 10, second nut 11, the 3rd nut 12, the distance that the 4th nut is 13, thereby reach the purpose of adjusting precompression, though this kind method can be obtained the adjustment of precompression, but relatively also because member comparatively complicated, they must be in the 11 outer surface cutted threads 111 of second nut, perhaps on the face that the 3rd nut 12 joins, provide the space that first screw 14 can be installed, adjust the size of precompression by the rotation of screw thread, cause in manufacturing and assembling all to seem comparatively time-consuming and take a lot of work, naturally promptly can cause the raising of cost of production many.

Because this thinks funiculus for solving the above problems the inventor through detailed, and the long-pending experience of being engaged in various ball screws and relevant spare part manufacturing and exploitation for many years, several times manufacture experimently and study, must develop a kind of adjustable type prepressing structure of ball screw eventually.

Summary of the invention

Primary and foremost purpose of the present invention is to provide a kind of adjustable type prepressing structure of ball screw.

For achieving the above object, the technical solution adopted in the present invention is: the adjustable type prepressing structure of a kind of ball screw provided by the present invention, be installed between two nuts of ball screw, but the mat change in displacement is to produce precompression, to reach the precompression of adjusting ball screw, this prepressing structure is made up of two pre-compressing tablets substantially, and an end face of each pre-compressing tablet all is manufactured with an inclined-plane, can make this each pre-compressing tablet be set in respectively between two nuts of this ball screw, and the inclined-plane that makes this each pre-compressing tablet is each other and contacts shape in correspondence with each other, so move by the relative displacement of this each pre-compressing tablet, stressed from impelling between two nuts, the pre-compressing tablet of cause changes in conjunction with thickness, from the precompressions that can produce different sizes.

Offer a groove on the one pre-compressing tablet for inserting a retainingf key, and system is established several holes on another pre-compressing tablet, utilize locating stud to implant to make this pre-compressing tablet get nut adjacent thereto in this each hole to be combined as a whole.

Insert a pad between the groove of this pre-compressing tablet and the retainingf key.

This is offered on the corresponding surface of reeded pre-its inclined surface of compressing tablet and forms in conjunction with rib, while is the then corresponding long engagement groove of a length that forms on the nut that is adjacent, so by this in conjunction with the cooperating of rib and engagement groove, this pre-compressing tablet slide displacement that can carry out.

Insert more than one pad between the groove of this pre-compressing tablet and the retainingf key, in order to do the variation of obtaining control precompression size.

This retainingf key may be molded to approximate T type key, in order to do in order to support screw cap.

On this retainingf key, offer one and adjust screw hole, lock screw and make precompression obtain adjustment to suppress pre-compressing tablet.

Offer fixed screw holes on the retainingf key, mat is locked screw must be combined as a whole this retainingf key and nut.

Use beneficial effect of the present invention to be:

An advantage of the present invention because its can be when installing required radial thrust control precompression, therefore has to adjust and is easy to actual effect.

Another advantage of the present invention, it can be reached the size of adjusting the control precompression by the thickness of the length of retainingf key overhang or pad, so very simple and easy and also have actual effect concurrently in the variation.

The 3rd advantage of the present invention, it can use two piece combined pre-compressing tablets, utilize screw control to make its do big or small displacement in various degree, from producing the precompression that cooperates required different sizes, because the adjustment of precompression again need not to rely on fully the experience of assembler, have in the making and be easy to reach standardized advantage.

For making your auditor can further understand structure of the present invention, feature and other advantage, lift a preferable possible embodiments now and cooperate graphic detailed description as after, your auditor the phase makes can have further the present invention to know from experience and understanding.

Description of drawings

Fig. 1 is the generalized section of the adjustable type prepressing structure of existing ball screw.

Fig. 2 is the partial cutaway schematic of the adjustable type prepressing structure of existing another ball screw.

Fig. 3 is a three-dimensional exploded view of the present invention.

Fig. 4 is a plane of the present invention assembled sectional view.

Fig. 5 A is the floor map that the present invention shows precompressed chip bonding state.

Fig. 5 B is the floor map that the present invention shows pre-compressing tablet parallel shift state.

Fig. 5 C is the floor map that the present invention shows one of them pre-compressing tablet stress.

The primary clustering symbol description

10 first nuts, 11 second nuts

111 screw threads

12 the 3rd nuts 13 the 4th nut

14 first screws

2 the 5th nuts, 22 first draw-in grooves

3 the 6th nuts, 31 engagement grooves

32 second draw-in grooves

4 first pre-compressing tablets, 41 first inclined-planes

411 holes, 42 first corresponding surfaces

5 second pre-compressing tablets, 51 second inclined-planes

52 second corresponding surfaces, 53 grooves

521 in conjunction with rib

6 pads

7 retainingf keys, 71 overhangs

72 extension parts, 73 fixed screw holes

74 second screws 75 are adjusted screw hole

76 adjust screw

Embodiment

See also Fig. 3, shown in Figure 4, the adjustable type prepressing structure of ball screw provided by the present invention is installed between the 5th nut 2, the 6th nut 3 of ball screw, but the mat change in displacement is to produce precompression, to reach the precompression of adjusting ball screw, it is characterized in that:

This prepressing structure is substantially by the first pre-compressing tablet 4, the second pre-compressing tablet 5 is formed, and the first pre-compressing tablet 4, an end face of the second pre-compressing tablet 5 all is manufactured with first inclined-plane 41, second inclined-plane 51, can make this first pre-compressing tablet 4, the second pre-compressing tablet 5 is set in the 5th nut 2 of this ball screw respectively, between the 6th nut 3, and make this first pre-compressing tablet 4, first inclined-plane 41 of the second pre-compressing tablet 5, second inclined-plane 51 is each other and contacts shape in correspondence with each other, so by this first pre-compressing tablet 4, the relative displacement action of the second pre-compressing tablet 5, from impelling the 5th nut 2,3 on the 6th nut is stressed, because of the first pre-compressing tablet 4, the second pre-compressing tablet 5 changes in conjunction with thickness, from the precompressions that can produce different sizes.

Can produce the operating principle of precompression as for the present invention, please cooperate and consult Fig. 4, Fig. 5 A, Fig. 5 B and Fig. 5 C figure can be clear that, because this first pre-compressing tablet 4, an end face of the second pre-compressing tablet 5 is to mill into first inclined-plane 41, second inclined-plane 51, suppose this first inclined-plane 41, second inclined-plane 51 and another corresponding surface 42, angle between second corresponding surface 52 is α, when the first pre-compressing tablet 4, the second pre-compressing tablet 5 is during from the parallel relative displacement of the beginning of closed state (shown in Fig. 5 A) each other, when its amount of movement is Δ L, Vertical direction is with rising Δ H (Δ H=Δ L * tan α) (shown in Fig. 5 B), so certainly, can be at the 5th nut 2, produce the precompression of different sizes between the 6th nut 3, shown in Fig. 5 C, promptly be that the radial force that is to illustrate when the people assembles and applied is when being F2, this first pre-compressing tablet 4, second pre-compressing tablet 5 and the 5th nut 2, the active force (being precompression) of the 6th nut 3 surface of contact is F1, and F3 promptly to represent be the first pre-compressing tablet 4, the second pre-compressing tablet, 5 its first inclined-planes 41, second inclined-plane 51 active force to each other.

As shown in Figure 3, prepressing structure of the present invention mainly is made up of first pre-compressing tablet 4, the second pre-compressing tablet 5, a pad 6, a retainingf key 7 and an adjustment screw 76; Wherein on one second pre-compressing tablet 5, offer a groove 53 for inserting this retainingf key 7, on another first pre-compressing tablet 4, then make on the whole and be provided with several holes 411, can utilize locating stud to implant and make this first pre-compressing tablet 4 to be combined as a whole by the 5th nut 2 adjacent thereto in this each hole 411, in addition, wherein more can on offering one second corresponding surface 52 on the second pre-compressing tablet, 5 its corresponding second inclined-planes 51 of groove 53, this form in conjunction with rib 521, while is the then also corresponding long engagement groove 31 of a length that forms on the 6th nut 3 that is adjacent, so by this in conjunction with the cooperating of rib 521 and the 6th nut 3 engagement grooves 31, this second pre-compressing tablet 5 is subjected to the radial thrust effect, and oneself can carry out and is the slide displacement actor; It should be noted that, between the groove 53 of this second pre-compressing tablet 5 and retainingf key 7, also can insert a pad 6 again, certainly in order to obtain the variation of control precompression size, wherein this pad 6 can be inserted more than a slice, and the precompression that these pad of inserting 6 numbers are the more then given birth to is also just big.

As Fig. 3, shown in Figure 4, the present invention wherein this retainingf key 7 may be molded to the kenel that is similar to T type key, so it can utilize retainingf key 7 overhangs 71 to replace this pad 6, and and then reach the purpose of this second pre-compressing tablet 5 of ejection, utilize both sides extension part 72 its then can with the 5th nut 2, first draw-in groove 22 of the 6th nut 3, second draw-in groove 32 is fastened, in this way from can with the 5th nut 2, the 6th nut 3 is obtained combination, certainly for obtaining combination completely, wherein more can on this retainingf key 7, offer fixed screw holes 73, but mat is locked second screw 74 and is made this retainingf key 7 and the 5th nut 2, the 6th nut 3 must be combined as a whole; In addition,, wherein more can on this retainingf key 7, offer one and adjust screw hole 75, but mat is locked and adjusted screw 76 and make precompression obtain adjustment to suppress the second pre-compressing tablet 5 in order to reach the advance and retreat displacement that to control this second pre-compressing tablet 5.

In sum, the disclosed structure of this case inventive embodiments, it can use two piece combined pre-compressing tablets, utilize screw control to make its do big or small displacement in various degree, from producing the precompression that cooperates required different sizes, because the adjustment of precompression again need not to rely on fully the experience of assembler, really have in the making and be easy to reach standardized advantage.

More than be preferred embodiment of the present invention and design graphic, only preferred embodiment and designing graphicly only illustrates, it is not interest field in order to restriction skill of the present invention, all skill means with equalization, or be following " claim " the interest field implementer that content contained, all do not break away from category of the present invention and be claimant's interest field.

Claims

1. the adjustable type prepressing structure of a ball screw is installed between two nuts of ball screw, can to reach the precompression of adjusting ball screw, it is characterized in that by change in displacement to produce precompression:

This prepressing structure is made up of two pre-compressing tablets, and an end face of each pre-compressing tablet is provided with an inclined-plane, this each pre-compressing tablet is set in respectively between two nuts of this ball screw, and the inclined-plane that makes this each pre-compressing tablet is each other and contacts shape in correspondence with each other, relative displacement of each the pre-compressing tablet action by this makes stressedly between two nuts to change in conjunction with varied in thickness because of pre-compressing tablet;

Offer a groove on the one pre-compressing tablet for inserting a retainingf key, and system is established several holes on another pre-compressing tablet, utilize locating stud to implant to make this pre-compressing tablet get nut adjacent thereto in this each hole to be combined as a whole; This is offered on the corresponding surface of reeded pre-its inclined surface of compressing tablet and forms in conjunction with rib, while is the then corresponding long engagement groove of a length that forms on the nut that is adjacent, so by this in conjunction with the cooperating of rib and engagement groove, this pre-compressing tablet slide displacement that carries out.

2. the adjustable type prepressing structure of ball screw according to claim 1 is characterized in that: insert a pad between the groove of this pre-compressing tablet and the retainingf key.

3. the adjustable type prepressing structure of ball screw according to claim 1 is characterized in that: insert more than one pad between the groove of this pre-compressing tablet and the retainingf key, be used for controlling the variation of precompression size.

4. the adjustable type prepressing structure of ball screw according to claim 1 is characterized in that: this retainingf key is shaped to approximate T type key, in order to support screw cap.

5. the adjustable type prepressing structure of ball screw according to claim 1 is characterized in that: offer one and adjust screw hole on this retainingf key, lock screw and make precompression obtain adjustment to suppress pre-compressing tablet.

6. the adjustable type prepressing structure of ball screw according to claim 4 is characterized in that: offer fixed screw holes on the retainingf key, by locking screw this retainingf key and nut must be combined as a whole.