CN207033985U - A kind of oil-free steel ball bushing with double bushing structure - Google Patents

Abstract

the utility model discloses a no oil feeding steel ball cover of double-bush structure, including holder and outer bush, evenly set up the first hole groove of a plurality of groups on the holder, the length of holder is L mm, the interval of two adjacent first hole grooves in the axial is 2mm, the quantity of first hole groove is L/2 group at least, the first hole groove of every group is arranged along circumference array, all install the steel ball in the first hole inslot, the outer bush cover is established in the holder outside, the position that corresponds all first hole grooves on the outer bush sets up the second hole groove, pack solid lubricant in the second hole groove, set up the arch along circumference array on the inner circumference face of outer bush, set up the recess with protruding matched with on the holder, the quantity of arch and recess is the same with the quantity in first hole groove, set up solid lubricant on the outer bush, solid lubricant and steel ball contact, the steel ball is lubricated by emollient constantly when rolling, both guaranteed lubricated continuity like this, improve lubricating efficiency, also need not to add lubricating oil, avoid artifical oiling, reduce the cost of labor.

Description

A kind of oil-free steel ball bushing with double bushing structure

technical field

The utility model relates to the technical field of mold accessories, in particular to an oil-feeding steel ball sleeve with a double bush structure.

Background technique

The steel ball sleeve has high precision axial movement and radial movement, and the matching shaft and sleeve adopt interference fit. Can realize gap-free assembly. The combination precision is extremely high, so it is widely used in the mold industry, machine equipment industry, and industries with high-precision operation or motion. Known steel ball sleeves are mainly composed of matrix+steel balls. The substrate is processed into regular holes according to industry standards, and steel balls are pressed into them, and the steel balls can move flexibly and are not easy to fall off.

Due to the large number of steel balls in the steel ball sleeve, the steel ball pressing device is used to press the steel balls into the hole grooves during production. During use, the method of manually adding lubricating oil is used for lubrication. The steel balls are not evenly lubricated, and some steel balls may be worn out in advance. The effect is difficult to guarantee, and the labor cost is high.

Utility model content

The purpose of this utility model is to provide a non-oiling steel ball bushing with double bushing structure to solve the problems raised in the above-mentioned background technology.

In order to achieve the above object, the utility model provides the following technical solutions:

An oil-free steel ball bushing with a double bushing structure, comprising: a cage and an outer bush, several groups of first hole grooves are uniformly arranged on the cage, the length of the cage is Lmm, and two axially adjacent The spacing of the first holes is 2 mm, the number of the first holes is at least L/2 groups, each group of first holes is arranged in a circumferential array, and steel balls are installed in the first holes; the outer bushing is sleeved on On the outer side of the cage, second holes are arranged on the outer bush corresponding to all the first holes, and the second holes are filled with solid lubricant; protrusions are arranged in a circumferential array on the inner circumference of the outer bush to maintain Grooves matched with the protrusions are arranged on the frame, and the number of the protrusions and the grooves is the same as that of the first holes.

As a further solution of the utility model: the solid lubricant may be molybdenum disulfide.

As a further solution of the utility model: the inner surface of the solid lubricant is provided with a spherical groove compatible with the arc surface of the steel ball.

As a further proposal of the present invention: the section width of the solid lubricant is one-thirtieth of the outer circumference of the outer bushing.

As a further solution of the present invention: the material of the outer bushing is high carbon steel.

As a further solution of the utility model: the outer bush and the cage adopt interference fit.

Compared with the prior art, the beneficial effects of the utility model are:

1. Compared with the existing steel ball sleeve structure in which the steel ball directly contacts the guide sleeve, the steel ball sleeve in the utility model adopts the structure of an inner cage and an outer bush to avoid contact between the steel ball and the inner wall of the guide sleeve, and the steel ball will not contact the guide sleeve. The friction of the sleeve reduces the wear of the unnecessary steel ball of the pen, and it also has a protective effect on the guide sleeve;

2. A solid lubricant is set on the outer bush, which contacts the steel ball, and the steel ball is continuously lubricated by the lubricant when rolling, which not only ensures the continuity of lubrication, improves the lubrication efficiency, but also does not need to add lubricating oil, avoiding artificial Oiling reduces labor costs. In addition, each steel ball can be lubricated evenly, and the lubrication effect is good;

3. Combining the above characteristics, the steel ball sleeve in the utility model has better working stability and longer service life, and prolongs the replacement cycle.

Description of drawings

Fig. 1 is the structural representation of the utility model.

FIG. 2 is a schematic diagram of the cross-sectional structure along line A-A of FIG. 1 .

FIG. 3 is a schematic diagram of the enlarged structure at B in FIG. 2 .

detailed description

The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. example. Based on the embodiments of the present utility model, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the scope of protection of the present utility model.

Please refer to Figures 1 to 3. In an embodiment of the present invention, a double bush structure oil-free steel ball bushing includes: a cage 2 and an outer bush 1, and several groups of first Holes, the length of the cage 2 is Lmm, the distance between two adjacent first holes in the axial direction is 2mm, the number of first holes is at least L/2 groups, and each group of first holes is arranged in a circumferential array , Steel balls 3 are installed in the first holes; the outer bushing 1 is sleeved on the outside of the cage 2, and the positions of the outer bushing 1 corresponding to all the first holes are also provided with second holes 11, the second The hole 11 is filled with solid lubricant, and then the steel ball 3 is pressed into the first hole, and then the outer bushing 1 is assembled, and the position of the second hole 11 corresponds to the first hole, so that it is installed Finally, the steel ball 3 is in contact with the solid lubricant, and the solid lubricant is used to lubricate it during rolling, without adding lubricating oil, and the lubricating effect is better; the inner peripheral surface of the outer bush 1 is provided with protrusions 12 along the circumferential array to maintain The frame 2 is provided with a groove matching the protrusion 12, the number of the protrusion 12 and the groove is the same as the number of the first hole groove, when the outer bushing 1 is assembled, the protrusion 12 corresponds to the position of the groove, so that both It can prevent the relative rotation between the cage 2 and the outer bush 1, avoid the position of the first hole and the second hole 11 not corresponding, and also directly make the first hole and the second hole 11 correspond to each other during assembly. Easy to assemble.

The solid lubricant may be molybdenum disulfide.

The inner surface of the solid lubricant is provided with a spherical groove suitable for the arc surface of the steel ball 3, so that the contact area between the molybdenum disulfide and the steel ball 3 is larger, and the lubrication efficiency is higher.

The cross-sectional width of the solid lubricant is one-thirtieth of the outer circumference of the outer bush 1, and the solid lubricant will basically fail when the life cycle of the steel ball 3 is reached.

The outer bushing 1 is made of high carbon steel.

The outer bush 1 and the cage 2 adopt interference fit to keep the position of the outer bush 1 and the cage 2 firm.

It is obvious to those skilled in the art that the present invention is not limited to the details of the above exemplary embodiments, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, no matter from all points of view, the embodiments should be regarded as exemplary and non-restrictive, and the scope of the present invention is defined by the appended claims rather than the above description, so it is intended to fall within the scope of the claims All changes within the meaning and range of equivalents of the required elements are included in the present invention. Any reference sign in a claim should not be construed as limiting the claim concerned.

In addition, it should be understood that although this specification is described according to implementation modes, not each implementation mode only contains an independent technical solution, and this description in the specification is only for clarity, and those skilled in the art should take the specification as a whole , the technical solutions in the various embodiments can also be properly combined to form other implementations that can be understood by those skilled in the art.

Claims (6)

1. An oil-feeding steel ball bushing with a double bushing structure, comprising: a cage (2) and an outer bush (1), and several groups of first hole grooves are evenly arranged on the cage (2), and it is characterized in that : The length of the cage (2) is Lmm, the distance between two adjacent first holes in the axial direction is 2mm, the number of first holes is at least L/2 groups, and each group of first holes is arrayed along the circumferential direction Arrangement, steel balls (3) are installed in the first holes; the outer bushing (1) is sleeved on the outside of the cage (2), and the outer bushing (1) is provided with the second The hole (11), the second hole (11) is filled with a solid lubricant; the outer bush (1) is provided with protrusions (12) in a circumferential array on the inner peripheral surface, and the cage (2) is provided with The protrusion (12) cooperates with the groove, and the number of the protrusion (12) and the groove is the same as the number of the first hole. 2. The oil-free steel ball bushing with double bushing structure according to claim 1, characterized in that: the solid lubricant can be molybdenum disulfide. 3. The oil-free steel ball bushing with double bushing structure according to claim 2, characterized in that: the inner surface of the solid lubricant is provided with a spherical groove compatible with the arc surface of the steel ball (3). 4 . The oil-free steel ball bushing with double bushing structure according to claim 3 , wherein the section width of the solid lubricant is one-thirtieth of the outer circumference of the outer bushing 1 . 5. The oil-free steel ball bushing with double bushing structure according to claim 1, characterized in that: the outer bushing (1) is made of high carbon steel. 6. The oil-free steel ball bushing with double bushing structure according to claim 1 or 5, characterized in that: said outer bushing (1) and cage (2) adopt interference fit.