A manual ball loading tool for a bearing

Abstract

The utility model provides a manual ball loading tool for bearing belongs to mechanical technical field. It has solved the inconvenient problem of prior art tool. In the utility model, the bearing includes the outer ring, the retainer and the steel ball, the tool includes the mould base, the mould base top is equipped successively from top to bottom with the tapered guide ball surface, the upper annular step and the lower annular step, the upper annular step and the lower annular step are inserted for the retainer and the outer ring respectively, the tool still includes the cylinder with the tapered guide ball surface coaxial, the mould base is hollow and is sleeved in the lower end of the cylinder, the mould base inner diameter is not less than the cylinder outer diameter, the cylinder outer wall, the retainer inner peripheral surface and the tapered guide ball surface form the annular groove with the tapered guide ball surface coaxial, the annular groove width is less than the steel ball diameter, the cylinder upper end is equipped with the ball storage cavity in the axial direction, the cylinder is formed with the inclined hole, the inclined hole two ends are communicated with the ball storage cavity and the annular groove respectively, and the inclined hole can only accommodate one steel ball in the radial direction. The manual ball loading tool for bearing is convenient to use.

Description

Technical Field

[0001] This utility model belongs to the field of mechanical technology and relates to a manual ball loading fixture, particularly a manual ball loading fixture for bearings. Background Technology

[0002] Ball loading fixtures are key tools in the bearing assembly process, mainly used for the precise installation and positioning of steel balls. Their structure is exemplified by a ball loading mold for angular contact ball bearings disclosed in the Chinese Patent Database (application number: 202322211834.4). This mold includes an outer ring, an inner ring, and several steel balls mounted between the outer and inner rings via a cage. The lower ends of the outer ring, inner ring, and cage are provided with the ball loading mold. The ball loading mold includes a first platform, a second platform, and an inclined platform. The ball loading mold is formed by stacking the three platforms sequentially from bottom to top. The first platform is used to mount the outer ring; the second platform is used to mount the cage; and the inclined platform is used to mount the inner ring.

[0003] When the above mold is used, several steel balls are poured onto the inclined platform, resulting in a messy initial arrangement of the steel balls. Therefore, it is necessary to manually move them continuously to adjust their direction and position. However, due to the inclination of the inclined platform, the steel balls are easily over-adjusted, making the whole operation cumbersome and inconvenient. Utility Model Content

[0004] The purpose of this invention is to address the aforementioned problems in existing technologies by proposing a user-friendly manual ball-loading fixture for bearings.

[0005] The objective of this utility model can be achieved through the following technical solution: A manual ball loading fixture for bearings, wherein the bearing includes an outer ring, a cage, and steel balls. The fixture includes a mold base, the top of which is provided with a conical guide ball surface, an upper annular step, and a lower annular step from top to bottom, and the upper and lower annular steps are respectively for inserting the cage and the outer ring. The fixture is characterized in that it further includes a cylinder coaxial with the conical guide ball surface, the mold base is hollow and fits on the lower end of the cylinder, and the inner diameter of the mold base is not less than the outer diameter of the cylinder; an annular groove coaxial with the conical guide ball surface is formed between the outer wall of the cylinder, the inner circumferential surface of the cage, and the conical guide ball surface, and the groove width is less than the diameter of the steel ball; a ball storage cavity is provided axially at the upper end of the cylinder, and an oblique hole is formed in the cylinder, the two ends of the oblique hole are respectively connected to the ball storage cavity and the annular groove, and the oblique hole can only accommodate one steel ball in the radial direction.

[0006] In use, several steel balls that make up a bearing are poured into the ball storage cavity, and the steel balls are manually moved to enter the inclined hole in sequence. Then the cylinder is rotated so that the steel balls pass through the annular groove and enter the ball pocket of the cage in sequence. After the balls are loaded, the upper sliding mold seat drives the whole assembly consisting of the outer ring, cage and steel balls to move upward and separate from the cylinder, and send it to the bearing inner ring loading station.

[0007] When using it, you only need to rotate the cylinder and move the steel ball into the inclined hole to complete the ball loading process. The whole operation is relatively regular and easy to learn, with the advantages of being convenient and easy to use.

[0008] In the aforementioned manual ball loading fixture for bearings, a tapered groove with a diameter that gradually decreases from top to bottom is formed on the bottom wall of the ball storage cavity. The tapered groove and the cylinder are coaxially arranged, and the upper end of the inclined hole extends to the bottom wall of the tapered groove. Forming the tapered groove on the bottom wall of the ball storage cavity allows the steel ball to be guided to move automatically downwards into the inclined hole using the slope of the tapered groove, thereby reducing the frequency of manual operation and further facilitating use.

[0009] In the aforementioned manual ball-loading fixture for bearings, the outer diameter of the lower end of the cylinder is larger than the outer diameter of the middle part of the cylinder. This allows an annular shoulder surface to be formed at the connection between the middle and lower ends of the cylinder. The shoulder surface is horizontally positioned, and the annular groove is formed between the shoulder surface, the outer surface of the middle part of the cylinder, the inner circumferential surface of the cage, and the tapered guide ball surface. This design maximizes the width of the annular groove, thereby increasing the area on which the steel ball enters the annular groove. This allows the steel ball to roll into the ball pocket of the cage more quickly and smoothly when the cylinder rotates, making the use smoother and more convenient.

[0010] In the aforementioned manual ball loading fixture for bearings, the outer diameter of the upper end of the cylinder is the same as the outer diameter of the middle part of the cylinder, so as to facilitate the machining and shaping of the cylinder.

[0011] In the aforementioned manual ball-loading fixture for bearings, there is a clearance fit between the lower end of the cylinder and the inner hole of the mold base, and the difference between the inner diameter of the mold base and the outer diameter of the lower end of the cylinder is 0.15mm to 0.18mm. This design facilitates the separation of the mold base from the cylinder.

[0012] Compared with existing technologies, this manual ball loading fixture for bearings has the following advantages:

[0013] 1. When using it, you only need to rotate the cylinder and move the steel ball into the inclined hole to complete the ball loading process. The whole operation is relatively regular and easy to learn. It has the advantages of being convenient and easy to use.

[0014] 2. A conical groove is formed on the bottom wall of the ball storage cavity to guide the steel ball to move automatically downward into the inclined hole by utilizing the slope of the conical groove, thereby reducing the frequency of manual operation and further facilitating use. Attached Figure Description

[0015] Figure 1 This is a three-dimensional schematic diagram of the manual ball loading fixture used for bearings.

[0016] Figure 2 This is a cross-sectional view of the manual ball loading fixture used for bearings.

[0017] Figure 3 yes Figure 2 Enlarged diagram of point A in the middle.

[0018] Figure 4 This is a three-dimensional schematic diagram of the mold base.

[0019] In the diagram, 1 is the bearing; 1a is the outer ring; 1b is the cage; 1c is the steel ball; 2 is the cylinder; 2a is the ball storage cavity; 2b is the oblique hole; 2c is the tapered groove; 2d is the shaft shoulder surface; 3 is the mold base; 3a is the center hole; 3b is the tapered guide ball surface; 3c is the upper annular step; 3d is the lower annular step; and 4 is the annular groove. Detailed Implementation

[0020] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments.

[0021] like Figure 1 and Figure 2 As shown, the type of bearing adapted in this application is a ball bearing. The structure of this bearing 1 is very common, typically including an inner ring, an outer ring 1a, a cage 1b, and a ring of steel balls 1c.

[0022] Specifically

[0023] like Figures 1 to 4 As shown, the manual ball-loading fixture for bearings includes a cylinder 2 and a hollow mold base 3. The mold base 3 has a vertically penetrating central hole 3a, which is coaxial with the mold base 3. The bottom surface of the mold base 3 is flat. The top of the mold base 3, from top to bottom, is provided with a conical guide ball surface 3b, an upper annular step 3c, and a lower annular step 3d. All three are coaxial with the mold base 3 and are continuously distributed from top to bottom. The diameter of the conical guide spherical surface 3b gradually increases from top to bottom, and the upper end of the conical guide spherical surface 3b extends to connect with the inner wall of the central hole 3a; the shape and size of the upper annular step 3c match the aforementioned retainer 1b, and the shape and size of the lower annular step 3d match the aforementioned outer ring 1a. In actual use, the retainer 1b and the outer ring 1a are respectively inserted into the upper annular step 3c and the lower annular step 3d for positioning.

[0024] The cylinder 2 and the conical guide spherical surface 3b are coaxially arranged, meaning the cylinder 2 is vertically positioned. The bottom surface of the cylinder 2 is also flat, and the mold base 3 is fitted onto the lower end of the cylinder 2 through the central hole 3a. The inner diameter of the mold base 3 is not less than the outer diameter of the cylinder 2, so that the mold base 3 can slide up and down and separate from the cylinder 2. Figure 2 and Figure 3As shown, an annular groove 4, coaxial with the conical guide surface 3b, is formed between the outer wall of the cylinder 2, the inner circumferential surface of the retainer 1b, and the conical guide surface 3b. The width of the annular groove 4 is smaller than the diameter of the steel ball 1c. A ball-storage cavity 2a is axially provided at the upper end of the cylinder 2. The ball-storage cavity 2a and the mold base 3 are coaxially arranged, and the opening of the ball-storage cavity 2a faces upwards. An oblique hole 2b is formed inside the cylinder 2. The two ends of the oblique hole 2b connect the ball-storage cavity 2a and the annular groove 4, respectively, and the oblique hole 2b can only accommodate one steel ball 1c radially. Preferably, the diameter of the oblique hole 2b is slightly larger than the diameter of the steel ball 1c.

[0025] In use, several steel balls 1c constituting a bearing 1 are poured into the ball storage cavity 2a, and the steel balls 1c are manually moved to enter the inclined hole 2b in sequence. Then, the cylinder 2 is rotated so that the steel balls 1c pass through the annular groove 4 and enter the ball pocket of the cage 1b in sequence. Specifically, when the inclined hole 2b and the ball pocket of the cage 1b are misaligned, the steel ball 1c at the bottom first partially extends into the annular groove 4 and presses against the conical guide ball surface 3b. Then, the steel ball 1c follows the cylinder 2 to rotate until it is aligned with the ball pocket of the cage 1b. The steel ball 1c continues to roll downward and finally enters the ball pocket of the cage 1b. At this time, the steel ball 1c is completely separated from the inclined hole 2b and no longer contacts the cylinder 2. After the balls are loaded, the upper sliding mold seat 3 drives the whole consisting of the outer ring 1a, the cage 1b and the steel balls 1c to move upward and separate from the cylinder 2, and send it to the position for loading the inner ring 1a of the bearing 1.

[0026] In use, simply rotate the cylinder 2 and move the steel ball 1c into the inclined hole 2b to complete the ball loading process. The entire operation is relatively straightforward and easy to learn, with advantages such as convenience and ease of use.

[0027] Preferably, a conical groove 2c with a diameter that gradually decreases from top to bottom is formed on the bottom wall of the ball storage cavity 2a. The conical groove 2c and the cylinder 2 are coaxially arranged, and the upper end of the inclined hole 2b extends to the bottom wall of the conical groove 2c. The conical groove 2c is formed on the bottom wall of the ball storage cavity 2a so that the slope of the conical groove 2c can guide the steel ball 1c to move automatically downward into the inclined hole 2b, thereby reducing the frequency of manual operation and further facilitating use.

[0028] like Figure 2 and Figure 3 As shown, the outer diameter of the lower end of cylinder 2 is larger than the outer diameter of the middle part of cylinder 2, so that an annular shoulder surface 2d is formed at the connection between the middle and lower ends of cylinder 2. The shoulder surface 2d is horizontally positioned, and the annular groove 4 is formed between the shoulder surface 2d, the outer surface of the middle part of cylinder 2, the inner circumferential surface of cage 1b, and the conical guide ball surface 3b. This design maximizes the width of the annular groove 4, thereby increasing the area for the steel ball 1c to enter the annular groove 4. This allows the steel ball 1c to roll into the ball pocket of cage 1b more quickly and smoothly when cylinder 2 rotates, making it smoother and more convenient to use. Preferably, the outer diameter of the upper end of cylinder 2 is the same as the outer diameter of the middle part of cylinder 2 to facilitate the machining and forming of cylinder 2.

[0029] In the actual product, there is a clearance fit between the lower end of the cylinder 2 and the inner hole of the mold base 3, and the difference between the inner diameter of the mold base 3 and the outer diameter of the lower end of the cylinder 2 is 0.15mm to 0.18mm. This design facilitates the separation of the mold base 3 from the cylinder 2. Preferably, the difference between the inner diameter of the mold base 3 and the outer diameter of the lower end of the cylinder 2 is 0.17mm.

[0030] The specific embodiments described herein are merely illustrative examples illustrating the spirit of this utility model. Those skilled in the art to which this utility model pertains may make various modifications or additions to the described specific embodiments or use similar methods to substitute them, without departing from the spirit of this utility model or exceeding the scope defined by the appended claims.

Claims

1. A manual ball-loading fixture for a bearing, the bearing (1) comprising an outer ring (1a), a cage (1b), and steel balls (1c), the fixture comprising a mold base (3), the top of the mold base (3) being provided with a tapered guide ball surface (3b), an upper annular step (3c), and a lower annular step (3d) sequentially from top to bottom, wherein the upper annular step (3c) and the lower annular step (3d) are respectively for inserting the cage (1b) and the outer ring (1a), characterized in that, The tooling also includes a cylinder (2) coaxial with the conical guide ball surface (3b), a mold base (3) is hollow and fitted on the lower end of the cylinder (2), and the inner diameter of the mold base (3) is not less than the outer diameter of the cylinder (2); an annular groove (4) coaxial with the conical guide ball surface (3b) is formed between the outer wall of the cylinder (2), the inner circumferential surface of the retainer (1b) and the conical guide ball surface (3b), and the groove width of the annular groove (4) is less than the diameter of the steel ball (1c); a ball storage cavity (2a) is provided axially at the upper end of the cylinder (2), and an oblique hole (2b) is formed inside the cylinder (2), the two ends of the oblique hole (2b) are connected to the ball storage cavity (2a) and the annular groove (4) respectively, and the oblique hole (2b) can only accommodate one steel ball (1c) in the radial direction.

2. The manual ball loading tool for a bearing of claim 1, wherein, The bottom wall of the aforementioned ball storage cavity (2a) is formed with a conical groove (2c) whose diameter gradually decreases from top to bottom. The conical groove (2c) and the cylinder (2) are coaxially arranged, and the upper end of the oblique hole (2b) extends to the bottom wall of the conical groove (2c).

3. The manual ball loading tool for a bearing of claim 1, wherein, The outer diameter of the lower end of the cylinder (2) is larger than the outer diameter of the middle part of the cylinder (2) so that an annular shoulder surface (2d) is formed at the connection between the middle and lower ends of the cylinder (2). The shoulder surface (2d) is horizontally arranged, and the aforementioned annular groove (4) is formed between the shoulder surface (2d), the outer side of the middle part of the cylinder (2), the inner circumferential surface of the cage (1b), and the conical guide ball surface (3b).

4. The manual ball loading tool for a bearing of claim 3, wherein, The outer diameter of the upper end of cylinder (2) is the same as the outer diameter of the middle part of cylinder (2).

5. The manual ball loading tool for a bearing of claim 4, wherein, The lower end of the cylinder (2) and the inner hole of the mold base (3) are fitted with a clearance, and the difference between the inner diameter of the mold base (3) and the outer diameter of the lower end of the cylinder (2) is 0.15mm to 0.18mm.

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