A tool for installing a spiral retaining ring on a shaft and its usage method

Abstract

This invention belongs to the field of mechanical assembly technology and discloses a tool and method for installing a spiral retaining ring for a shaft. The installation tool includes a tool body, a fixed jaw, a movable jaw, and a sliding groove. The tool body is an arc structure smaller than a semicircle. The front end of the tool body has a step with a height consistent with the total thickness of the spiral retaining ring. A square groove is also provided at the front end of the tool body, and a rectangular groove parallel to the front end face of the tool body is provided next to the square groove. The fixed jaw is installed on the square groove of the tool body, and the jaw portion of the fixed jaw extends out from the square groove below the tool body. The movable jaw is slidably installed in the rectangular groove of the tool body, and the jaw portion of the movable jaw extends out from the rectangular groove below the tool body. The sliding groove is installed above the tool body to restrict the sliding of the movable jaw within the rectangular groove. This invention minimizes the deformation of the spiral retaining ring, thus preventing detachment. Compared with existing tools for installing spiral retaining rings for shafts, it can prevent scratches on the surface of parts.

Description

Technical Field

[0001] This invention belongs to the field of mechanical assembly technology, and relates to a tool and method for installing a spiral retaining ring for a shaft. Background Technology

[0002] Currently, when assembling spiral retaining rings on shaft parts, the common method is to manually pull the end of the spiral retaining ring to enlarge its inner diameter before installing it into the spiral retaining ring mounting groove on the shaft. This practice may cause plastic deformation of the spiral retaining ring, leading to a risk of it falling off during operation.

[0003] Another method involves using tools. Workers use existing shaft spiral retaining ring installation tools to slip the spiral retaining ring onto the shaft, ensuring the inner diameter of the ring is tightly secured. Then, a sleeve is used to push the spiral retaining ring into the spiral retaining ring installation groove on the shaft to complete the installation. The problem with this assembly method is that installing spiral retaining rings on shaft parts with high surface quality requirements can easily scratch the surface of the parts and generate debris. If not thoroughly cleaned, this debris may remain inside the assembly, forming excess material. Summary of the Invention

[0004] To address the aforementioned problems, this invention provides a tool and method for installing a spiral retaining ring on a shaft. When using this tool to install the spiral retaining ring on a shaft, deformation of the retaining ring can be prevented, and the surface of the shaft of the assembled part will not be damaged.

[0005] The technical solution of the present invention is as follows:

[0006] A tool for installing a spiral retaining ring on a shaft includes a tool body, a fixed jaw, a movable jaw, and a sliding groove. The tool body is an arc structure smaller than a semicircle. The front end of the tool body has a step with a height consistent with the total thickness of the spiral retaining ring. The front end of the tool body also has a square groove, and a rectangular groove parallel to the front end face of the tool body is provided next to the square groove. The fixed jaw is installed on the square groove of the tool body, and the jaw portion of the fixed jaw extends out from the square groove below the tool body. The movable jaw is slidably installed on the rectangular groove of the tool body, and the jaw portion of the movable jaw extends out from the rectangular groove below the tool body. The sliding groove is installed above the tool body to restrict the jaw of the movable jaw from sliding within the rectangular groove.

[0007] Furthermore, the width of the jaws of the fixed jaws is consistent with the thickness of a single spiral retaining ring.

[0008] Furthermore, the lower surface of the fixed jaw is fixedly connected to the upper surface of the tool body. The jaw portion of the fixed jaw is located at the front end of the fixed jaw. The jaw portion of the fixed jaw extends downward along the square groove to the lower surface of the tool body, and the bottom of the jaw portion protrudes to the right to form a contact surface with the spiral retaining ring.

[0009] Furthermore, the width of the jaws of the movable jaws is consistent with the thickness of a single spiral retaining ring.

[0010] Furthermore, the slide is fixedly installed on the upper surface of the tool body, and there is a gap between the slide and the tool body. The rear side of the movable jaw has a protruding edge, which is inserted into the gap. The bottom of the movable jaw is the jaw part of the movable jaw. The jaw part of the movable jaw extends downward along the rectangular groove to the lower surface of the tool body. The bottom of the jaw part protrudes to the left to form a contact surface with the spiral retaining ring.

[0011] Furthermore, handles are provided above both the fixed jaws and the movable jaws.

[0012] Furthermore, the jaws of both the fixed and movable jaws are made of alloy steel and heat-treated to achieve a hardness of HRC45-50.

[0013] A method for using a tool for installing a shaft spiral retaining ring: Using the tool as described above, place the spiral retaining ring on the stepped surface of the tool body. Hook one end of the spiral retaining ring with the jaws of the fixed jaws. Slide the movable jaws to the position closest to the fixed jaws and hook the other end of the spiral retaining ring with the jaws of the movable jaws. Then slide the movable jaws away from the fixed jaws to pry open the spiral retaining ring. Place the shaft part into the spiral retaining ring and align the spiral retaining ring mounting groove with the spiral retaining ring. Finally, slide the movable jaws back to the position closest to the fixed jaws to tighten both ends of the spiral retaining ring. Finally, detach the installation tool from the shaft part.

[0014] The beneficial effects of this invention are:

[0015] 1. The use of this invention transforms the outward bending force on the end of the spiral retaining ring into an axial pushing force on the spiral retaining ring material, thereby turning the local deformation of the spiral retaining ring into overall deformation, minimizing the amount of deformation of the spiral retaining ring, and thus preventing it from detaching during operation.

[0016] 2. Compared with existing shaft spiral retaining ring installation tools, the present invention can directly place the spiral retaining ring into the spiral retaining ring installation groove, preventing scratches and chipping on the surface of the part.

[0017] 3. This invention is easy to use, and the overall arc length is less than a semicircle, which makes it easy to separate the tool from the parts after the spiral retaining ring is installed in place. Attached Figure Description

[0018] To more clearly illustrate the technical solutions of the embodiments of this invention, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this invention and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained from these drawings without creative effort.

[0019] Figure 1 A schematic diagram of a tool for installing a shaft spiral retaining ring provided by the present invention;

[0020] Figure 2 This is a schematic diagram of the tool body of the tool of the present invention;

[0021] Figure 3 This is a schematic diagram of the fixed jaws of the tool of the present invention;

[0022] Figure 4 This is a schematic diagram of the movable jaws of the tool of the present invention;

[0023] Figure 5 This is a schematic diagram illustrating the use of the tool of the present invention.

[0024] Among them, 1—tool body, 2—fixed jaws, 3—movable jaws, 4—slide groove, 5—screw for installing slide groove, and 6—screw for installing fixed jaws. Detailed Implementation

[0025] This section describes embodiments of the present invention, used to explain and illustrate the technical solutions of the present invention. Unless otherwise specified, the embodiments and features described herein can be combined with each other.

[0026] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating directions or positional relationships, are given in the accompanying drawings and are used only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or device referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implying the number of indicated technical features. Thus, features defined with "first," "second," etc., may explicitly or implicitly include more than one of those features. In the description of this invention, unless otherwise stated, "a plurality of" means two or more.

[0027] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integrated connections; they can refer to mechanical connections or point connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0028] A tool for installing a spiral retaining ring on a shaft includes a tool body 1, a fixed jaw 2, a movable jaw 3, and a sliding groove 4. The tool body 1 is an arc structure smaller than a semicircle. The front end of the tool body 1 has a step with a height consistent with the total thickness of the spiral retaining ring. The front end of the tool body 1 is also provided with a square groove, and a rectangular groove parallel to the front end face of the tool body 1 is provided next to the square groove. The fixed jaw 2 is installed on the square groove of the tool body 1, and the jaw part of the fixed jaw 2 extends out from the square groove below the tool body 1. The movable jaw 3 is slidably installed in the rectangular groove of the tool body 1, and the jaw part of the movable jaw 3 extends out from the rectangular groove below the tool body 1. The sliding groove 4 is installed above the tool body 1 to restrict the jaw of the movable jaw 3 from sliding within the rectangular groove.

[0029] The width of the jaws of the fixed jaw 2 is consistent with the thickness of a single spiral retaining ring.

[0030] The lower surface of the fixed jaw 2 is fixedly connected to the upper surface of the tool body 1. The jaw part of the fixed jaw 2 is located at the front end of the fixed jaw 2. The jaw part of the fixed jaw 2 extends downward along the square groove to the lower surface of the tool body 1. The bottom of the jaw part protrudes to the right to form a contact surface with the spiral retaining ring.

[0031] The width of the jaws of the movable jaw 3 is consistent with the thickness of a single spiral retaining ring.

[0032] The slide groove 4 is fixedly installed on the upper surface of the tool body 1. There is a gap between the slide groove 4 and the tool body 1. The rear side of the movable jaw 3 has a protruding edge, and the protruding edge of the movable jaw 3 is inserted into the gap. The bottom of the movable jaw 3 is the jaw part of the movable jaw 3. The jaw part of the movable jaw 3 extends downward along the rectangular groove to the lower surface of the tool body 1. The bottom of the jaw part protrudes to the left to form a contact surface with the spiral retaining ring.

[0033] Both the fixed jaw 2 and the movable jaw 3 are equipped with handles.

[0034] The jaws of the fixed jaw 2 and the movable jaw 3 are made of alloy steel and are heat-treated to achieve a hardness of HRC45-50.

[0035] A method for using a tool for installing a shaft spiral retaining ring: Using the tool as described above, place the spiral retaining ring on the stepped surface of the tool body. Hook one end of the spiral retaining ring with the jaws of the fixed jaws. Slide the movable jaws to the position closest to the fixed jaws and hook the other end of the spiral retaining ring with the jaws of the movable jaws. Then slide the movable jaws away from the fixed jaws to pry open the spiral retaining ring. Place the shaft part into the spiral retaining ring and align the spiral retaining ring mounting groove with the spiral retaining ring. Finally, slide the movable jaws back to the position closest to the fixed jaws to tighten both ends of the spiral retaining ring. Finally, detach the installation tool from the shaft part.

[0036] Another embodiment of the present invention will now be described with reference to the accompanying drawings.

[0037] Figure 1 This is a schematic diagram of a tool for installing a shaft spiral retaining ring provided by the present invention. Figure 2 This is a schematic diagram of the tool body of the tool of the present invention; Figure 3 This is a schematic diagram of the fixed jaws of the tool of the present invention; Figure 4 This is a schematic diagram of the movable jaws of the tool of the present invention; Figure 5 This is a schematic diagram illustrating the use of the tool of the present invention.

[0038] This invention provides a tool for installing a spiral retaining ring on a shaft, comprising a tool body 1, a fixed jaw 2, a movable jaw 3, and a sliding groove 4. The fixed jaw 2 is fixed to the tool body 1 by screws, with a gap between the jaw portion and the step at the end of the tool body. The spiral retaining ring is inserted into the gap to prevent it from falling off during expansion. The fixed jaw hooks and fixes one end of the spiral retaining ring. The movable jaw 3 is inserted into a narrow groove in the tool body 1 and is confined within the narrow groove by the sliding groove 4 fixed to the tool body. The movable jaw 3 hooks the other end of the spiral retaining ring and slides along an arc direction within the narrow groove of the tool body, expanding the diameter of the spiral retaining ring. It is then pushed along the shaft end where the spiral retaining ring is mounted towards the mounting groove. Once in the mounting groove position, the movable jaw 3 is released, and the spiral retaining ring enters the mounting groove on the shaft, thus detaching the installation tool from the part.

[0039] Tool body 1 is an arc-shaped structure with an arc length less than a semicircle, facilitating the separation of the tool from the part after the spiral retaining ring is installed in place. Figure 2As shown. At one end of the arc, along the inner side of the arc surface, there is a step S1, the height of which is approximately equal to the total thickness of the spiral retaining ring, used to limit the spiral retaining ring. At one end of the arc, along the outer end face of the arc surface, there is a square groove, the depth of which is approximately equal to the total thickness of the spiral retaining ring, used to install and fix the jaws 2, and fastened to the tool body with screws through two through holes in the fixing part of the fixed jaws. Near the end of the square groove, there is a narrower through hole along the circumferential direction, i.e., a rectangular groove, the width of which is equivalent to the total thickness of the spiral retaining ring, into which the movable jaw 3 is inserted. The sliding groove 4 is fixed to the other two threaded holes on the tool body with screws through two through holes on it. The fixed jaw 2 is placed in the square groove on the end face and fastened to the threaded holes on the tool body with screws through two holes in the fixing part. The movable jaw 3 is inserted into the narrow hole and is limited to sliding within the narrow through hole range by the step on the sliding groove 4. The sliding groove 4 is fixed to the tool body with screws through two holes.

[0040] Tool body 1, such as Figure 2 As shown, aluminum alloy material can be used, making it lightweight. The tool body has an arc-shaped structure with an arc length less than a semicircle, facilitating the separation of the tool from the parts after the spiral retaining ring is installed. The inner bending radius r1 of the arc surface is greater than the radius of the shaft to which the spiral retaining ring is assembled, ensuring that the spiral retaining ring does not interfere with the shaft during assembly after enlargement. At one end of the arc, there is a step along the inner side of the arc surface to restrict the elastic retaining ring. The bending radius r2 is the sum of the diameter of the spiral retaining ring after enlargement (greater than the radius of the shaft to which the spiral retaining ring is assembled) and the radial width of the spiral retaining ring. The inner diameter of the spiral retaining ring after enlargement is greater than the diameter of the shaft to which it is assembled, ensuring smooth passage of the shaft to the assembly position. The distance S1 from the bending radius r2 to the end face is the thickness of the retaining ring (i.e., twice the thickness δ of the retaining ring material). At one end of the arc, there is a square groove along the outer end face of the arc surface, with a groove depth equivalent to the thickness of the retaining ring, used to install and fix the jaws 2. The jaws are then fastened to the two threaded holes on the tool body with screws through the two through holes of the fixing part of the jaws. Near one end of the square groove, there is a narrow through hole along the circumferential direction, which is flush with the step S1 at the end face. The width S2 of the square groove is equivalent to the thickness of the spiral retaining ring material. The movable jaw 3 is inserted into the narrow through hole. The slide 4 is fixed to the other two threaded holes on the tool body by screws through the two through holes on it.

[0041] Fixed jaw 2 Figure 3 As shown, the thickness δ1 of the fixed jaw is approximately equal to the thickness of the spiral retaining ring material. It is placed within the square groove on the end face of the tool body and secured to the two threaded holes on the tool body via two through holes in the fixing part of the fixed jaw. The working surface of the fixed jaw (the contact surface with the spiral retaining ring) matches the dimensions of the spiral retaining ring end (including arc, height, etc.) to increase the contact surface during operation and ensure stable hooking of the spiral retaining ring end during operation. The fixed jaw is made of alloy steel. Due to its thickness being comparable to and relatively thin compared to the spiral retaining ring material, it is prone to deformation during use and requires heat treatment to achieve a hardness of approximately HRC45-50.

[0042] Movable jaws 3 Figure 4 As shown, the thickness δ1 of the movable jaw is comparable to the thickness of the spiral retaining ring material. The movable jaw 3 is inserted into the narrow through hole of the tool body, and a protruding edge δ2 slides within the narrow hole range under the constraint of the step of the sliding groove 4. The working surface of the movable jaw (the contact surface with the spiral retaining ring) matches the dimensions of the spiral retaining ring end (including arc, height, etc.) to improve the contact surface during operation and ensure stable hooking of the other end of the spiral retaining ring during operation. The sliding jaw is made of alloy steel. Because its thickness is comparable to that of the spiral retaining ring material and is relatively thin, it is prone to deformation during use and requires heat treatment to achieve a hardness of approximately HRC45-50.

[0043] The slide 4 is also an arc-shaped structure, with the arc surface matching the outer surface of the tool body and fastened to the tool body by screws. The step at the end of the arc surface engages with the protruding edge δ2 on the movable jaw to restrict the sliding of the movable jaw within the narrow through hole range.

[0044] Figure 5 This is a schematic diagram illustrating the use of the tool of the present invention. The following will... Figure 5 The usage process of this invention tool is further described in detail below. First, move the movable jaws close to the fixed jaws; insert the opening of the spiral retaining ring into the jaws, press down one layer of the spiral retaining ring with the fixed jaws, and hook the two ends of the spiral retaining ring with the fixed jaws and movable jaws respectively; move the movable jaws in the opposite direction of the fixed jaws (counterclockwise as shown in the figure), the inner hole of the spiral retaining ring becomes larger. When the inner hole is larger than the shaft diameter, put the spiral retaining ring on the shaft and abut it against the assembly (such as a bearing) on ​​the shaft; release the sliding jaws, the spiral retaining ring springs back, its diameter decreases and it is stuck in the groove, and the fixed jaws and movable jaws disengage from the spiral retaining ring. The spiral retaining ring installation is complete.

[0045] This invention provides a tool for installing a spiral retaining ring on a shaft, which is easy to operate; it is not limited by the shaft length, and has no impact on the installation of the spiral retaining ring regardless of the shaft length; it is not limited by the small space between the mounting groove on the shaft and adjacent structures, such as when the spiral retaining ring mounting groove is adjacent to a nearby part (e.g., Figure 5 All bearings (on the shaft) can be installed smoothly; the installation process does not damage the shaft. If the shaft is made of a soft material such as aluminum alloy, the inner diameter of the spiral retaining ring can be enlarged to be larger than the shaft diameter, preventing scratching and thus avoiding shaft damage. Because the tool has an arc-shaped structure and the movable jaws have a controllable range of motion, the spiral retaining ring can be enlarged to a diameter greater than the shaft diameter for installation without plastic deformation, ensuring reliable operation. The jaw structure matches the shape of the spiral retaining ring end, providing a large contact surface, and the fixed jaws press down on the spiral retaining ring, preventing slippage when the diameter is enlarged. The jaws are made of alloy steel with a hardness of HRC45 or higher, ensuring the required strength and preventing deformation. Therefore, the tool provided by this invention is highly suitable for installing spiral retaining rings.

Claims

1. A tool for installing a spiral retaining ring on a shaft, characterized in that, The tool includes a tool body (1), a fixed jaw (2), a movable jaw (3), and a sliding groove (4). The tool body (1) is an arc structure smaller than a semicircle. The front end of the tool body (1) has a step with a height consistent with the total thickness of the spiral retaining ring. The front end of the tool body (1) is also provided with a square groove, and a rectangular groove parallel to the front end face of the tool body (1) is provided next to the square groove. The fixed jaw (2) is installed on the square groove of the tool body (1), and the jaw part of the fixed jaw (2) extends out from the square groove below the tool body (1). The movable jaw (3) is slidably installed in the rectangular groove of the tool body (1), and the jaw part of the movable jaw (3) extends out from the rectangular groove below the tool body (1). The sliding groove (4) is installed above the tool body (1) to restrict the jaw of the movable jaw (3) from sliding in the rectangular groove. The width of the jaws of the fixed jaws (2) is consistent with the thickness of a single spiral retaining ring; The lower surface of the fixed jaw (2) is fixedly connected to the upper surface of the tool body (1). The jaw part of the fixed jaw (2) is located at the front end of the fixed jaw (2). The jaw part of the fixed jaw (2) extends downward along the square groove to the lower surface of the tool body (1). The bottom of the jaw part protrudes to the right to form a contact surface with the spiral retaining ring. The fixed jaw (2) hooks and fixes one end of the spiral retaining ring. The fixed jaw (2) presses down on one layer of the spiral retaining ring.

2. The tool for installing a shaft spiral retaining ring according to claim 1, characterized in that, The width of the jaws of the movable jaw (3) is consistent with the thickness of a single spiral retaining ring.

3. The tool for installing a shaft spiral retaining ring according to claim 2, characterized in that, The slide groove (4) is fixedly installed on the upper surface of the tool body (1). There is a gap between the slide groove (4) and the tool body (1). The rear side of the movable jaw (3) has a protruding edge, and the protruding edge of the movable jaw (3) is inserted into the gap. The bottom of the movable jaw (3) is the jaw part of the movable jaw (3). The jaw part of the movable jaw (3) extends downward along the rectangular groove to the lower surface of the tool body (1). The bottom of the jaw part protrudes to the left to form a contact surface with the spiral retaining ring.

4. The tool for installing a shaft spiral retaining ring according to claim 1, characterized in that, Both the fixed jaw (2) and the movable jaw (3) are equipped with handles.

5. The tool for installing a shaft spiral retaining ring according to claim 1, characterized in that, The jaws of the fixed jaws (2) and the movable jaws (3) are made of alloy steel and are heat-treated to achieve a hardness of HRC45-50.

6. A method of using a tool for installing a shaft spiral retaining ring, comprising using a tool for installing a shaft spiral retaining ring as described in any one of claims 1 to 5, characterized in that, Place the spiral retaining ring on the stepped surface of the tool body. Hook one end of the spiral retaining ring with the jaws of the fixed jaws. Slide the movable jaws to the position closest to the fixed jaws and hook the other end of the spiral retaining ring with the jaws of the movable jaws. Then slide the movable jaws away from the fixed jaws to pry open the spiral retaining ring. Place the shaft part into the spiral retaining ring and align the spiral retaining ring mounting groove with the spiral retaining ring. Finally, slide the movable jaws back to the position closest to the fixed jaws to tighten both ends of the spiral retaining ring. Finally, detach the installation tool from the shaft part.

Images