CN201065925Y - Circulator positioning structure of ball screw - Google Patents

Abstract

The utility model discloses a circulator location structure of ball screw relates to ball screw's group component, invents for firm location circulator. The method comprises the following steps: the circulator is arranged at a preset position of a nut component of the ball screw and comprises a ball circulating hole and a positioning end, wherein the positioning end is positioned at one side of a fastener accommodating space arranged in the nut component, a positioning fastener is arranged in the fastener accommodating space, the positioning fastener at least defines a side surface part and a peripheral part, and the side surface part faces the positioning end of the circulator; the positioning end of the circulator is also provided with at least one bulge, and the bulge extends towards the side surface part of the positioning fastener. The utility model discloses eliminate really that the fit clearance between location fastener and the fastener accommodation space, effectively stabilize the practical progressive nature of location circulator.

Description

Circulator positioning structure of ball screw

technical field

The utility model relates to a group member of a ball screw, in particular to a positioning structure of a circulator of the ball screw.

Background technique

The ball screw and a nut are screwed together, which is one of the common methods of linear transmission. In principle, the nut can move along the axial direction of the ball screw by rotating the ball screw, and then the shaft transmission can be transformed into a linear transmission type.

In addition, due to the limitation of the length of the nut, the balls installed between the ball screw and the nut must be set through a ball circulation mechanism so that the balls can be continuously recycled and used. This mechanism is currently called a circulator in the industry. The circulators are usually set in sets at both ends of the threaded grooves of the nut. At present, there is not only one type of assembly type of the assembly and positioning structure of this kind of circulator, for example, the structural type of positioning the circulator by a buckle (such as a C-shaped buckle). As for the typical embodiment of this type of structure, please refer to the new patent of Taiwan Patent Certificate No. M276915 "Ball Screw End Circulation Device". By positioning the adjacent side of the C-shaped buckle of the circulator, a sealing sheet is additionally stacked and jointly locked in a ring groove provided by the nut of the ball screw (refer to the definition of claim 3 of the application).

However, in the actual assembly experience of this existing structure, it is found that in addition to the problem of increased material cost caused by the sealing sheet, after the C-shaped buckle and the sealing sheet are snapped into the ring groove, there will actually still be a matching gap exists, so that the circulator still cannot be effectively and stably positioned. In this way, when the circulator faces the axial and radial loads generated by the operation of the ball screw, it will easily loosen and deviate from the original position, thereby affecting the serious problem of smooth circulation of the balls. To solve this problem, in practice, the industry usually has to add another processing procedure, which is a process of deforming and pressing the side wall edge of the ring groove in a local area toward the C-shaped buckle by stamping means. Although the gap between the C-shaped buckle and the ring groove is indeed eliminated, it is obvious that the increase in the processing procedure will cause an increase in manufacturing cost and a decrease in production process efficiency, which is not in line with better industrial utilization benefits.

Another solution, as disclosed in U.S. Patent No. 5,664,459, mainly adopts the design of forming a guide slope around the C-shaped buckle, so that when the C-shaped buckle is assembled into the ring groove and stretched outward elastically , it can use its guide slope to resist against the slope of the inner wall of the ring groove to achieve a tighter and tighter positioning effect. However, as far as the actual implementation of this existing structure is concerned, as far as the production industry is concerned, since the C-shaped buckle is a standard part, it is originally a relatively low-cost and easy-to-obtain component. If it needs to be molded separately The production cost of the special shape with a guide slope around it is bound to be greatly increased, and it is necessary to form a precise guide slope on the fine metal ring that meets the functional requirements, and I am afraid that it will face another technical breakthrough. The high cost required is obviously unacceptable to the general industry, so this existing structure also has quite large blind spots, which are difficult to overcome and are widely used.

Therefore, in view of the problems existing in the positioning structure of the circulator of the above-mentioned existing ball screw, how to develop a more ideal and practical innovative structure is what users expect, and it is also the goal and direction that related companies must work hard to develop breakthroughs. .

Utility model content

The purpose of the utility model is to provide a ball screw circulator positioning structure to stably position the circulator.

The utility model adopts the following technical solutions:

A circulator positioning structure of a ball screw, the circulator is set at a predetermined position of a nut member of the ball screw, and the circulator includes a ball circulation hole and a positioning end, wherein the positioning end is opposite to the position of the nut member. At one side of the fastener accommodating space, a positioning fastener is incorporated into the fastener accommodating space, and the positioning fastener defines at least one side surface and a peripheral portion, and the side surface faces the positioning of the circulator end; the positioning end of the circulator is provided with at least one protruding part, and the protruding part protrudes toward the side of the positioning fastener.

The positioning end is in a plane shape, or a plate shape, or a block shape.

The protruding portion may be integrally formed from the positioning end surface of the circulator.

The protruding parts are respectively made and reassembled at the positioning end of the circulator.

The cross-sectional shape of the protruding part can be: semicircular, tapered, trapezoidal, or triangular.

The utility model is mainly provided with a protruding part on the positioning end of the circulator, and the protruding part protrudes toward the side part of the positioning fastener. The innovative and unique design can use the protruding part to press against the position of the positioning fastener. The side part, thereby achieving the practical improvement of effectively eliminating the fit gap between the positioning fastener and the fastener accommodating space, and effectively and stably positioning the circulator.

Description of drawings

Fig. 1 is a combined perspective view of a preferred embodiment of the structure of the utility model.

Fig. 2 is an exploded perspective view of a preferred embodiment of the structure of the utility model.

Fig. 3 is an enlarged perspective view of the circulator of the present invention.

Fig. 4 is an exploded perspective view of only the positioning fastener of the present invention.

Fig. 5 is a combined sectional view of a preferred embodiment of the structure of the utility model.

Detailed ways

The specific embodiment of the utility model will be described in detail below in conjunction with the accompanying drawings.

As shown in Figures 1, 2, 3, and 4, they are preferred embodiments of the circulator positioning structure of the ball screw of the present invention, but these embodiments are for illustration only, and are not limited by this structure in patent applications .

The circulator 10 is assembled at a predetermined position of the nut member 30 of the ball screw 20, and the predetermined position is the end position of the screw groove 301 of the nut member 30; the circulator 10 includes a ball circulation hole 11 and a positioning end 12, wherein, the positioning end 12 is located at one side of the fastener accommodating space 31 provided on the nut member 30, and a positioning fastener 40 (such as a C-shaped buckle), the positioning fastener 40 at least defines a side portion 41 and a peripheral portion 42, and the side portion 41 faces the positioning end 12 of the circulator 10.

The positioning end 12 of the circulator 10 is also provided with at least one protruding portion 13, and the protruding portion 13 protrudes toward the side portion 41 of the positioning fastener 40, and the protruding degree of the protruding portion 13 is such that It is better that the groove width of the corresponding part of the fastener accommodation space 31 is slightly smaller than the thickness of the positioning fastener 40, so that when the positioning fastener 40 is assembled into the fastener accommodation space 31, it can be assembled in an urgent manner. In this way, the protruding portion 13 can be used to press against the positioning fastener 40 to obtain the effect of eliminating the fit gap and stably positioning the circulator.

Wherein, the positioning end 12 can be in a plane shape, or a plate shape, or a block shape.

Wherein, the protruding portion 13 can be a structural form integrally formed on the surface of the positioning end 12 of the circulator 10; in this embodiment, since the circulator 10 is usually made of plastic material, the integrally formed protruding The outlet portion 13 will also have a certain degree of plastic elasticity, so as to meet the function of the utility model to resist and locate the fastener 40 .

Wherein, the protruding portion 13 can also be a combined type that is manufactured separately and then combined with the positioning end 12 of the circulator 10 . (The drawings of this embodiment are omitted)

Wherein, the cross-sectional shape of the protruding portion 13 may be: semicircular (as disclosed in the drawings of this embodiment), conical, trapezoidal, or triangular.

Through the above-mentioned structure and composition design, the main core design of the present utility model is that the positioning end 12 of the circulator 10 is provided with this part of the protruding part 13; through the design, the main functions that can be achieved are as shown in Figure 5 As shown, when the positioning fastener 40 is incorporated into the fastener accommodating space 31 of the nut member 30, it can abut against the positioning fastener 40 in the axial direction (in terms of the axis direction of the ball screw 20) through the protrusion 13. The side portion 41 of the positioning fastener 40 thus effectively eliminates the matching gap between the positioning fastener 40 and the fastener accommodating space 31 , and thereby relatively stably positions the circulator 10 .

The utility model has the following advantages:

The utility model is mainly provided with a protruding part 13 at the positioning end of the circulator 10, and the protruding part 13 is protruding toward the side part 41 of the positioning fastener 40. The innovative and unique design can use the protruding part 13 Press against the side portion 41 of the positioning fastener 40, thereby achieving the practical improvement of effectively eliminating the fit gap between the positioning fastener 40 and the fastener accommodating space 31 and effectively stably positioning the circulator.

In addition, since the protruding portion 13 described in the present invention can be integrally formed from the surface of the positioning end 12 of the circulator 10, it can be manufactured together with the circulator 10, and the configuration of the protruding portion 13 is simple and simple. , It is quite easy to open molds and manufacture, so for the production industry, it can achieve better industrial utilization benefits of reducing manufacturing costs and improving production process efficiency.

To sum up, the innovative positioning structure design of the circulator disclosed by the utility model can indeed achieve the dual benefits of stable positioning and cost reduction, which is particularly practical and progressive and has better industrial utilization benefits, which is obviously different from the current conventional ones. The structure can match into.

What the above-mentioned embodiment discloses is used to specifically illustrate the utility model, and although the text is described through specific terms, should not limit the patent scope of the utility model with this; The spirit and principles of the utility model are then changed and modified to achieve the equivalent purpose, and these changes and modifications should all be covered in the scope defined by the scope of the patent application.

Claims (5)

1. the circulator position structure of a ball screw, described circulator is mounted on the nut component predetermined position of ball screw, this circulator includes ball-recirculation hole and positioning end, wherein this positioning end is to being positioned at a wherein side place of the set fastener containing space of this nut component, group is gone into a location fastener in this fastener containing space, this location fastener defines a side face and a peripheral portion at least, and this side face is in the face of the positioning end of circulator; It is characterized in that:

The positioning end of this circulator also is provided with at least one bump, and described bump protrudes out state towards the side face of locating fastener.

2. the circulator position structure of ball screw according to claim 1 is characterized in that, described positioning end is plane or an en plaque or a block kenel.

3. the circulator position structure of ball screw according to claim 1 is characterized in that, can the serve as reasons positioning end surface of this circulator of described bump is one-body molded.

4. the circulator position structure of ball screw according to claim 1 is characterized in that, described bump is for making the combined type kenel of recombinant in the positioning end of this circulator respectively.

5. the circulator position structure of ball screw according to claim 1 is characterized in that, the section configuration of described bump can be: semicircle, pointed, trapezoidal, the leg-of-mutton kenel of awl.

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