Reciprocating rotary linear motion ball bearing

Abstract

The utility model relates to bearing technical field, concretely relates to a reciprocating rotary linear motion ball bearing. The linear ball bearing of prior art generally adopts the structure of two channels to assemble the steel ball, and the volume is big, and the use in the occasion of small radial space is limited, and the installation is time-consuming and laborious, and the friction coefficient is big, and the requirement cannot be met. A reciprocating rotary linear motion ball bearing, including outer ring, retainer and a plurality of steel balls, the retainer is equipped with at least one column of steel balls, one end of the steel ball is exposed on the retainer, the other end is attached to the outer ring, and the position of the steel ball in the retainer is unchanged, the sealing ring of soft metal material is clamped on the both sides of the outer ring, and the sealing ring is fixed by the clamping spring on the outside. The utility model structure is reasonable, compact structure saves the space, can make linear reciprocating and rotary motion simultaneously, and the steel ball is non-circulating motion. High precision, low friction coefficient, can bear the medium load, realizes smooth, light and fast linear and rotary motion under the smallest friction resistance.

Description

Technical Field

[0001] This utility model relates to the field of bearing technology, and more specifically to a reciprocating rotary linear motion ball bearing. Background Technology

[0002] In fields such as industrial robots, precision machining equipment, automated handling systems, and specialized machinery, bearings are required to achieve linear and rotary motion with low frictional resistance. In existing technologies, such bearings typically employ a two-channel structure for assembling steel balls, resulting in a large bearing volume. This limits their use in applications with limited radial space, and installation is time-consuming and labor-intensive. Furthermore, their high coefficient of friction fails to meet the required performance. Utility Model Content

[0003] The purpose of this invention is to address the shortcomings of existing technologies by providing a compact, low-friction, and highly efficient reciprocating rotary linear motion ball bearing.

[0004] A reciprocating rotary linear motion ball bearing includes an outer ring, a cage, and a plurality of steel balls. The cage contains at least one row of steel balls, one end of which is exposed on the cage and the other end is in contact with the outer ring. The position of the steel balls within the cage remains unchanged. Soft metal sealing rings are clamped on both sides of the outer ring, and the sealing rings are engaged and fixed by snap rings located on their outer sides.

[0005] This utility model has a reasonable and compact structure that saves space; the bearing in this utility model can simultaneously perform linear reciprocating and rotary motions, while the steel balls undergo non-circular motion.

[0006] As a further improvement and supplement to the above solution, this utility model also includes the following additional technical features:

[0007] The sealing ring has a circular ring and a step, with the circular ring being secured to the outer ring; the outer ring has multiple circular holes on its circumference, and the step and circular holes are fitted together and fixed in place. The structure is stable and reliable.

[0008] The retaining ring has multiple oblique protrusions that engage with the grooves on the sealing ring. The structure is stable and reliable.

[0009] The cage has side rails on both sides, with stepped grooves on the inner sides of the side rails. The tail of the ball placement groove on the cage has a conical structure. The cage is made of C10 steel. The stepped grooves facilitate placement, and the conical structure provides reliable positioning. C10 steel has good strength, toughness, plasticity, and weldability. Using C10 steel to form the cage not only prevents the steel balls from falling out but also allows them to slide and roll smoothly during movement, avoiding unnecessary friction and noise. This structure enables low-noise and stable movement, making it particularly suitable for applications with strict noise requirements. It ensures stable equipment operation and high efficiency.

[0010] The sealing ring is made of brass. Both sides are sealed with brass to prevent internal rusting.

[0011] The outer ring is made of GCr15. The bearing ring is made of high-carbon chromium bearing steel GCr15 and undergoes a rigorous heat treatment process to improve its durability and service life. After heat treatment, the outer ring also needs to be ground and polished on its inner and outer surfaces to ensure a smooth surface, reduce friction and wear, and extend the service life of the bearing.

[0012] The following beneficial effects can be achieved by using this utility model: the bearing of this utility model can perform linear reciprocating motion and rotational motion at the same time, the steel ball has non-circular motion, high precision, low coefficient of friction, can withstand medium load, and achieve smooth and light linear and rotational motion with minimal frictional resistance.

[0013] Its compact structure saves space; it offers high precision and smooth movement. It features low friction, high efficiency, long lifespan, and easy maintenance. Suitable for industrial robots, precision machining equipment, automated material handling systems, and specialized machinery. It also applies to office equipment, medical equipment, and packaging equipment. Attached Figure Description

[0014] Figure 1 This is the front view of this utility model.

[0015] Figure 2 This is the front view of the outer ring 1 in this utility model.

[0016] Figure 3 This utility model Figure 2 The AA section view shown.

[0017] Figure 4 This is the front view of the cage 2 in this utility model.

[0018] Figure 5 This is a left view of the cage 2 in this utility model.

[0019] Figure 6 This utility model Figure 4 The enlarged view of section X shown.

[0020] Figure 7 This is the front view of the sealing ring 3 in this utility model.

[0021] Figure 8 This is the front view of the snap ring 5 in this utility model.

[0022] Figure 9 This is a left view of the snap ring 5 in this utility model. Detailed Implementation

[0023] The specific embodiments of this utility model will now be described in detail with reference to the accompanying drawings.

[0024] like Figure 1-9 As shown, this utility model is a reciprocating rotary linear motion ball bearing.

[0025] The reciprocating rotary linear motion ball bearing described in this embodiment includes an outer ring 1, a cage 2, and a plurality of steel balls 4. The inner hole in the middle of the outer ring 1 is a raceway. The cage 2 contains at least one row of steel balls 4, in this embodiment three rows. One end of each steel ball 4 protrudes from the cage 2, while the other end is in contact with the raceway of the outer ring 1. The position of the steel balls 4 within the cage 2 remains unchanged. Soft metal sealing rings 3 are fitted on both sides of the outer ring 1, and the sealing rings 3 are secured by retaining rings 5 ​​located on their outer sides. The steel balls 4 and the outer ring raceway are fitted with a clearance fit. When a working shaft or guide shaft is used during operation, the fit can be determined according to the specific working conditions.

[0026] The diameter of the exposed steel ball 4 on the cage 2 and the inner diameter of the sealing ring 3 differ in diameter by 0.075~0.105mm (i.e., the exposed diameter of the steel ball is smaller). During bearing operation, the sealing ring 3 does not directly contact the working shaft, thus preventing friction. Simultaneously, it forms a labyrinth with a very small clearance, which, during oil lubrication, forms an oil film, thereby achieving a sealing effect.

[0027] Furthermore, the sealing ring 3 is provided with a circular ring 31 and a step 33, the diameter of the circular ring 31 being larger than the diameter of the step 33, and the circular ring 31 being engaged with the outer ring 1; the outer ring 1 has multiple circular holes 11 on its circumference, and the step 33 and the circular holes 11 are fitted together and fixed. The fixing method can be any of the existing technologies, such as cotter pins.

[0028] Furthermore, the retaining ring 5 has multiple oblique protrusions 51 that engage with the grooves 32 on the sealing ring 3. The retaining ring 5 has multiple teeth along its inner diameter, with the teeth being downward-sloping protrusions 51. The grooves 32 have a conical structure and engage with the protrusions 51. The retaining ring 5 is secured to the outer ring 1.

[0029] Furthermore, the retainer 2 has side rails 23 on both sides, and stepped grooves 22 are provided on the inner side of the two side rails 23. The stepped grooves 22 provide guidance. The tail of the steel ball placement groove 21 on the retainer 2 has a conical structure, which fits in close contact with the steel ball 4. The material of the retainer 2 is C10 steel. Using C10 steel to form the retainer not only prevents the steel ball from falling off, but also allows the steel ball to slide and roll smoothly during movement, avoiding unnecessary friction and noise.

[0030] Furthermore, the sealing ring 3 is made of brass.

[0031] Furthermore, the outer ring 1 is made of GCr15. The bearing ring (i.e., the outer ring 1) is made of high-carbon chromium bearing steel GCr15 and undergoes a rigorous heat treatment process (the heat treatment process is existing technology and will not be elaborated here) to improve its durability and service life, while ensuring a smooth surface, reducing friction and wear, and extending the service life of the bearing.

[0032] When this reciprocating rotary linear ball bearing is used, the guide shaft enters from the inside of the outer ring 1, snap ring 3, seal ring 5, and cage 2 on one side, and exits from the outer ring 1, snap ring 3, and seal ring 5 on the other side. Therefore, the linear bearing and guide shaft are highly interchangeable. This means that users can freely combine different guide shafts according to actual needs. This feature makes it very flexible in application, ensuring good compatibility and stability whether replacing or upgrading.

[0033] The above are preferred embodiments of the present utility model and do not limit the scope of protection of the present utility model. Any modifications and improvements made by those skilled in the art based on the design concept of the present utility model should be considered within the scope of protection of the present utility model.

Claims

1. A reciprocating rotary linear motion ball bearing, comprising an outer ring (1), a cage (2), and a plurality of steel balls (4), characterized in that: The retainer (2) is provided with at least one row of steel balls (4), one end of the steel balls (4) is exposed on the retainer (2), and the other end is attached to the outer ring (1). The position of the steel balls (4) inside the retainer (2) remains unchanged. Soft metal sealing rings (3) are clamped on both sides of the outer ring (1). The sealing rings (3) are clamped and fixed by snap rings (5) located on their outer sides.

2. The reciprocating rotary linear motion ball bearing as described in claim 1, characterized in that: The sealing ring (3) is provided with a ring (31) and a step (33), and the ring (31) is attached to the outer ring (1); multiple round holes (11) are provided on the circumference of the outer ring (1), and the step (33) and the round holes (11) are attached and fixed.

3. The reciprocating rotary linear motion ball bearing as described in claim 1, characterized in that: The snap ring (5) has multiple oblique protrusions (51) that engage with the grooves (32) on the sealing ring (3).

4. The reciprocating rotary linear motion ball bearing as described in claim 1, characterized in that: The retainer (2) is provided with side rails (23) on both sides, and stepped grooves (22) are provided on the inner side of the two side rails (23). The tail of the steel ball placement groove (21) on the retainer (2) is provided with a conical structure; the material of the retainer (2) is C10 steel.

5. The reciprocating rotary linear motion ball bearing as described in claim 1, characterized in that: The sealing ring (3) is made of brass.

6. The reciprocating rotary linear motion ball bearing as described in any one of claims 1-5, characterized in that: The outer ring (1) is made of GCr15.

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