Linear motion needle bearing metal cage and nylon pocket combination retainer

Abstract

The utility model discloses a linear motion needle roller bearing metal framework and nylon half pocket combination retainer, including metal framework, a plurality of nylon half pockets are pressure -assembled in the metal framework, there is nylon belt connection between a plurality of nylon half pockets, a plurality of nylon half pockets are installed with needle roller, the utility model discloses a kind of metal framework and nylon half pocket combination linear motion needle roller bearing retainer formed by pressure -assembling nylon half pocket into the window hole of metal framework, not only make retainer have high strength, overall rigidity is good, processing technology is good, needle roller guiding is good, assembly is easy, work noise is low and the like, but also effectively improve bearing overall performance, improve the service life and reliability of bearing.

Description

Technical Field

[0001] This utility model relates to the field of rolling bearing technology, and in particular to a metal skeleton and nylon pocket combination cage for a linear motion needle roller bearing. Background Technology

[0002] Linear motion needle roller bearings are used in compact mechanical equipment on rolling guideways. They consist of needle rollers and a cage as the rolling components. Linear motion needle roller bearings bear radial loads. During operation, the needle rollers circulate in both directions on the guideway, while the cage performs reciprocating linear motion. The cages of linear motion needle roller bearings are generally made of stamped metal or nylon. Because the cage of a linear motion needle roller bearing performs reciprocating linear motion during operation, constantly accelerating from zero to operating speed and changing direction continuously, it bears significant impact loads. Therefore, linear motion needle roller bearings generally use stamped metal cages. However, stamped metal cages have problems such as high processing difficulty, complex assembly, difficulty in locking the needles, and high bearing noise during operation. While nylon cages solve the problems of stamped metal cages, they have low strength and poor rigidity, making them prone to deformation and even breakage during operation.

[0003] To address these issues, we propose a combined cage consisting of a metal skeleton and a nylon pocket for linear motion needle roller bearings. Utility Model Content

[0004] The purpose of this invention is to address the shortcomings of existing technologies by proposing a combined metal frame and nylon pocket retainer for linear motion needle roller bearings.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: A linear motion needle roller bearing with a metal skeleton and nylon pocket combination cage includes a metal skeleton, a plurality of nylon half pockets press-fitted into the metal skeleton, the plurality of nylon half pockets being connected by nylon straps, and needle rollers installed in the plurality of nylon half pockets.

[0006] Preferably, the metal frame is formed by stamping low-carbon steel plate DC01 or brass plate H62.

[0007] Preferably, the nylon semi-pocket is formed by injection molding of nylon 66 with 25% glass fiber added.

[0008] Preferably, the metal frame has multiple window openings that are adapted to the nylon semi-pocket holes.

[0009] Preferably, the number of nylon semi-pockets is designed to be 5-8 per group, and each group of nylon semi-pockets is press-fitted into both ends of the window opening in the metal frame to form a complete pocket.

[0010] The needle rollers are installed in a complete pocket to guide the combined cage in reciprocating linear motion.

[0011] Compared with the prior art, the beneficial effects of this utility model are as follows: This device presses nylon semi-hollows into the openings in the metal frame to form a linear motion needle roller bearing cage composed of a metal frame and nylon semi-hollows. This not only gives the cage advantages such as high strength, good overall rigidity, good machinability, good needle roller guidance, easy assembly, and low operating noise, but also effectively improves the overall performance of the bearing, increasing its service life and reliability. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the structure of a linear motion needle roller bearing with a metal skeleton and a nylon pocket combined retainer proposed in this utility model. Figure 2 for Figure 1 Enlarged cross-sectional schematic diagram of the metal skeleton and nylon semi-pocket structure in the image; Figure 3 for Figure 1 A schematic diagram of the metal skeleton structure in the diagram; Figure 4 for Figure 1 A schematic diagram of the nylon tape and nylon semi-pocket structure.

[0013] In the diagram: 1. Metal frame; 2. Nylon tape; 3. Nylon half-pocket; 4. Needle roller. Detailed Implementation

[0014] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0015] Reference Figure 1-4A linear motion needle roller bearing cage consisting of a metal skeleton and nylon pockets is disclosed. The metal skeleton 1 contains multiple nylon semi-pockets 3 press-fitted into it to form a complete cage. The metal skeleton 1 is formed by stamping low-carbon steel plate DC01 or brass plate H62. Multiple openings adapted to the nylon semi-pockets 3 are provided within the metal skeleton 1 for press-fitting the nylon semi-pockets 3. The nylon semi-pockets 3 are injection-molded from nylon 66 with 25% glass fiber added. Press-fitting the nylon semi-pockets 3 into the openings of the metal skeleton 1 forms a linear motion needle roller bearing composed of a metal skeleton and nylon pockets. The cage design solves the problems of high processing difficulty, complex assembly, difficult locking pins, loud bearing noise after assembly, and low strength and poor rigidity of nylon cages, which are prone to deformation or even breakage during operation. The nylon semi-pockets 3 are designed in groups of 5-8, and each group of nylon semi-pockets 3 is press-fitted into the two ends of the window opening on the metal frame 1 to form a complete pocket. Nylon strips 2 connect multiple nylon semi-pockets 3, and needle rollers 4 are installed in multiple nylon semi-pockets 3. The needle rollers 4 are installed in the complete pocket to guide the cage to perform reciprocating linear motion.

[0016] In practical use, by carefully selecting the fit between the nylon half-pocket 3 and the metal frame 1, it is ensured that the nylon half-pocket 3 can be easily inserted into the metal frame 1 through elastic deformation, and the assembly is secure and not easily detached. Because the nylon half-pocket 3 has a certain degree of elasticity, a set of needle rollers 4 can be easily installed in the nylon half-pocket 3 of the metal frame 1, forming an assembly of metal frame 1, nylon half-pocket 3, and needle rollers 4. During operation, the needle rollers 4 perform cyclic rolling motion in both directions on the guide rail, and the combined cage continuously cycles from zero to operating speed in a linear reciprocating motion. Because the combined cage contains the metal frame 1, it can withstand a large impact load. The nylon half-pocket 3 has a large containment area and good wear resistance, thus effectively preventing early damage to the linear motion needle roller bearing cage and improving bearing life and reliability.

[0017] In this utility model, the installation, connection or setting methods of all the components mentioned above are common mechanical methods, and the specific structure, model and coefficient index of all the components are their own technologies. As long as they can achieve their beneficial effects, they can be implemented, so they will not be described in detail.

[0018] The above embodiments are preferred embodiments of the present utility model, but the embodiments of the present utility model are not limited to the above embodiments. Any changes, modifications, substitutions, combinations, or simplifications made without departing from the spirit and principle of the present utility model shall be considered equivalent substitutions and shall be included within the protection scope of the present utility model.

[0019] In this utility model, unless otherwise stated, directional terms such as "up, down, left, right, front, back, inside, outside, and vertical and horizontal" in the terminology only represent the orientation of the term in its conventional use or are common names understood by those skilled in the art, and should not be regarded as limitations on the term. At the same time, numerals such as "first," "second," and "third" do not represent specific quantities or orders, but are only used to distinguish names. Moreover, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a series of elements includes not only those elements, but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

Claims

1. A metal skeleton and nylon pocket combination cage for a linear motion needle roller bearing, characterized in that: It includes a metal frame (1), which is press-fitted with a plurality of nylon half pockets (3), which are connected by nylon straps (2), and each of the plurality of nylon half pockets (3) is fitted with a needle roller (4).

2. The linear motion needle roller bearing metal skeleton and nylon pocket combined cage according to claim 1, characterized in that, The metal frame (1) is formed by stamping low carbon steel plate DC01 or brass plate H62.

3. The linear motion needle roller bearing metal skeleton and nylon pocket combined cage according to claim 1, characterized in that, The nylon semi-pocket (3) is formed by injection molding of nylon 66 with 25% glass fiber.

4. The linear motion needle roller bearing metal skeleton and nylon pocket combined cage according to claim 1, characterized in that, The metal frame (1) has multiple window openings that are compatible with the nylon half-pocket (3).

5. The linear motion needle roller bearing metal skeleton and nylon pocket combination cage according to claim 1, characterized in that, The nylon semi-pockets (3) are designed to be in groups of 5-8, and each group of nylon semi-pockets (3) is pressed into the two ends of the window opening in the metal frame (1) to form a complete pocket.

6. The linear motion needle roller bearing metal skeleton and nylon pocket combined cage according to claim 1, characterized in that, The needle roller (4) is installed in the complete pocket and is used to guide the combined cage to perform reciprocating linear motion.

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