A retaining ring support clamp

Abstract

This utility model discloses a retaining ring support fixture. It includes: a slider chuck with a protrusion at its bottom; a base with a guide groove that mates with the protrusion of the slider chuck; a central hole at the tail of the base; a guide screw that passes through the central hole of the base and is fixedly connected to the slider chuck; a wing nut that is threadedly connected to the end of the guide screw; one end of the slider chuck being fixedly connected to the retaining ring; and the other end of the base being fixedly connected to the retaining ring. The slider chuck can move axially within the guide groove. Rotating the wing nut drives the slider chuck to generate axial displacement along the guide groove, thereby achieving elastic deformation control of the retaining ring. This retaining ring support fixture, through the threaded transmission of the wing nut and the guide screw, and the sliding engagement of the slider chuck in the guide groove, can achieve precise elastic deformation control of the retaining ring; assembly can be completed by a single person.

Description

Technical Field

[0001] This utility model relates to the field of mechanical technology, and more specifically, to a retaining ring support clamp. Background Technology

[0002] In the field of generator rotor core assembly, the retaining ring, as a key fixing component at the rotor core shaft end, directly affects the reliability of equipment operation. Traditional retaining ring installation processes have the following problems: 1. When using traditional snap ring pliers to pry open the retaining ring, uneven force application and a lack of precise displacement control easily lead to localized stress concentration in the retaining ring, causing excessive elastic deformation. 2. The alignment of the retaining ring with the shaft retaining ring groove must be completed within the narrow space after the shaft is pressed into the core, requiring at least two operators to work together (one to pry open the retaining ring, and one to adjust the retaining ring angle), resulting in reduced assembly efficiency and increased labor costs. 3. Traditional snap ring pliers lack a self-locking structure and anti-slip design. When the retaining ring is in an expanded state, it is prone to sudden rebound under vibration. The retaining ring is easily slipped off due to frictional fixation between it and the support, and the shaft surface is easily scratched during installation.

[0003] Therefore, there is an urgent need for a new type of retaining ring support fixture that can achieve precise and controllable opening, rapid assembly by a single person, and has a self-locking anti-rebound function. Utility Model Content

[0004] This utility model provides a retaining ring support fixture to solve the problems of inaccurate retaining ring opening, low assembly efficiency, and easy sudden rebound of the retaining ring in the prior art.

[0005] To achieve the above objectives, this utility model provides a retaining ring support fixture, which includes: a slider chuck with a protrusion at its bottom; a base with a guide groove that mates with the protrusion of the slider chuck; a central hole at the tail of the base; a guide screw for passing through the central hole of the base and being fixedly connected to the slider chuck; a wing nut threadedly connected to the end of the guide screw; the slider chuck being fixedly connected to one end of the retaining ring; and the end of the base being fixedly connected to the other end of the retaining ring. The slider chuck can move axially within the guide groove, and rotating the wing nut can drive the slider chuck to generate axial displacement along the guide groove, thereby achieving elastic deformation control of the retaining ring.

[0006] Optionally, the end of the slider chuck is provided with a first pin hole; the end of the base is provided with a second pin hole; one end of the retaining ring is provided with a first retaining ring hole, which corresponds to the first pin hole; the other end of the retaining ring is provided with a second retaining ring hole, which corresponds to the second pin hole.

[0007] Optionally, it also includes: a pin, the pin comprising: a first pin and a second pin; the first pin is used to pass through the first retaining ring hole and the first pin hole to achieve a fixed connection between one end of the retaining ring and the slider chuck; the second pin is used to pass through the second retaining ring hole and the second pin hole to achieve a fixed connection between the other end of the retaining ring and the base.

[0008] Optionally, when the wing nut is rotated clockwise, the slider chuck can be driven to produce an axial displacement away from the end of the base along the guide groove; when the wing nut is rotated counterclockwise, the slider chuck can be driven to produce an axial displacement closer to the end of the base along the guide groove.

[0009] Optionally, the base has a U-shaped structure, including an end, a middle and a tail; the guide groove is located on the middle of the base.

[0010] Optionally, the threaded engagement between the wing nut and the guide screw has a friction self-locking function.

[0011] Optionally, the wing nut, after being screwed into the guide screw, contacts the tail end face of the base to form a mechanical stop structure.

[0012] Optionally, the rotation angle of the wing nut is linearly related to the expansion of the retaining ring, with each 90° clockwise rotation corresponding to a radial expansion of 0.3-0.5 mm in the retaining ring.

[0013] The beneficial effects of this utility model are:

[0014] This utility model provides a retaining ring support fixture. Through the threaded transmission between the wing nut and the guide screw, and the sliding engagement of the slider chuck in the guide groove, the retaining ring can achieve precise elastic deformation control. This retaining ring support fixture can be assembled by a single person, eliminating the need for multiple people and reducing labor costs by more than 50%. The frictional force between the wing nut and the guide screw, and the contact between the wing nut and the tail end face of the base, form a mechanical stop structure. Together, these constitute a self-locking structure, used to prevent the retaining ring from rebounding or shrinking under the force applied to the guide screw. Attached Figure Description

[0015] Figure 1 This is a cross-sectional view of the retaining ring support fixture provided in this embodiment of the utility model;

[0016] Figure 2 This is a structural schematic diagram of the retaining ring in an expanded state according to an embodiment of the present invention;

[0017] Figure 3 This is a structural schematic diagram of the retaining ring in its retracted state according to an embodiment of the present invention.

[0018] Symbol explanation:

[0019] Slider chuck-1, base-2, guide screw-3, wing nut-4, first pin hole-5, second pin hole-6, retaining ring-7. Detailed Implementation

[0020] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0021] Figure 1 This is a cross-sectional view of the retaining ring support fixture provided in this embodiment of the utility model; as shown Figure 1 As shown, the retaining ring support fixture includes:

[0022] 1. Slider chuck 1, with a protrusion at its bottom;

[0023] 2. The base 2 is provided with a guide groove that mates with the protrusion of the slider chuck 1; the tail of the base 2 is provided with a central hole;

[0024] In a preferred embodiment, the protrusion is a rectangular strip structure, and the base 2 is a U-shaped structure including an end, a middle, and a tail; the guide groove is located on the middle of the base 2. The rectangular protrusion of the slider chuck 1 and the guide groove of the base 2 form a sliding pair, that is, after the protrusion of the slider chuck 1 is inserted into the guide groove, it can slide along the axial direction of the guide groove.

[0025] The slider chuck 1 is fixedly connected to one end of the retaining ring 7; the end of the base 2 is fixedly connected to the other end of the retaining ring 7.

[0026] In one optional embodiment, the end of the slider chuck 1 is provided with a first pin hole 5; the end of the base 2 is provided with a second pin hole 6;

[0027] One end of the retaining ring 7 is provided with a first retaining ring 7 hole, which corresponds to the first pin hole 5; the other end of the retaining ring 7 is provided with a second retaining ring 7 hole, which corresponds to the second pin hole 6.

[0028] In an optional embodiment, a retaining ring support fixture further includes: a pin; the pin includes: a first pin and a second pin; the first pin is used to pass through the hole of the first retaining ring 7 and the first pin hole 5 to fix one end of the retaining ring 7 to the slider chuck 1; the second pin is used to pass through the hole of the second retaining ring 7 and the second pin hole 6 to fix the other end of the retaining ring 7 to the base 2 (i.e., the end of the base 2).

[0029] In this application, the design of the first pin hole 5, the second pin hole 6, the first pin, and the second pin can be used to assemble retaining rings 7 of different specifications (e.g., φ20-300mm).

[0030] 3. Guide screw 3, used to pass through the center hole of the base 2 and be fixedly connected to the slider chuck 1;

[0031] In an optional embodiment, the guide screw 3 is the core component of the transmission mechanism in this invention. Its main function is to convert the rotational motion into linear movement of the slider chuck 1 through threaded transmission under the action of rotational force, thereby driving the retaining ring 7 to undergo controllable radial deformation. The guide screw 3 preferably adopts a standard M8 coarse-pitch screw structure, with a total length of approximately 260 mm and a pitch of 1.25 mm, possessing good mechanical rigidity and linear propulsion control capability.

[0032] The base 2 has a central hole at its tail end along its axial direction, which is used to install the guide screw 3. The central hole is a φ10mm circular hole, and the clearance between the guide screw 3 and the diameter is controlled within 0.1mm to ensure guiding accuracy. The guide screw 3 passes through the central hole at the tail end of the base 2 to reach the tail end of the slider chuck 1, and is threadedly connected to the threaded hole at the tail end of the slider chuck 1. This allows the guide screw 3 to accurately transmit rotational force to the slider chuck 1 when it rotates, thereby pushing the slider chuck 1 to slide axially within the guide groove of the base 2.

[0033] 4. A wing nut 4 is threaded to the end of the guide screw 3; by rotating the wing nut 4, the slider chuck 1 can be driven to generate axial displacement along the guide groove, thereby realizing the elastic deformation control of the retaining ring 7.

[0034] In an optional embodiment, the wing nut 4 is a transmission component in this invention used for manually applying rotational driving force, allowing operators to rotate it directly with bare hands without the need for tools, making it suitable for rapid on-site operation. The wing nut 4 is made of metal material (such as 45# steel or stainless steel) and is integrally machined or die-cast, possessing good feel, torque transmission capability, and wear resistance.

[0035] The outer surface of the guide screw 3 is machined with a standard M8 thread segment, which mates with the internal threaded hole of the wing nut 4. In actual use, the operator rotates the wing nut 4 clockwise or counterclockwise, causing it to move relative to the guide screw 3, thus making the guide screw 3 move axially forward or backward. Since one end (head end) of the guide screw 3 is threadedly connected to the slider chuck 1, this axial movement is ultimately transmitted to the slider chuck 1, enabling the slider chuck 1 to move axially along the guide groove.

[0036] Figure 2This is a structural schematic diagram of the retaining ring in an expanded state according to an embodiment of the present invention; Figure 3 This is a structural schematic diagram of the retaining ring in its retracted state according to an embodiment of the present invention; as shown below. Figure 2 and Figure 3 As shown, when the wing nut 4 is rotated clockwise, the slider chuck 1 can be driven to move axially away from the end of the base 2 along the guide groove, thereby expanding the retaining ring 7; when the wing nut 4 is rotated counterclockwise, the slider chuck 1 can be driven to move axially closer to the end of the base 2 along the guide groove, thereby contracting the retaining ring 7.

[0037] In one optional embodiment, the rotation angle of the wing nut 4 is linearly related to the expansion amount of the retaining ring 7, with each 90° clockwise rotation corresponding to a radial expansion of 0.3-0.5 mm in the retaining ring 7.

[0038] Specifically, to achieve precise and controllable adjustment of the expansion of the retaining ring 7, the guide screw 3 used in this invention is designed with a standard M8 coarse thread structure and a pitch of 1.25mm. This means that for every full rotation of the wing nut 4 (i.e., 360°), the guide screw 3 will move 1.25mm along its axial direction.

[0039] Since one end of the guide screw 3 is fixedly connected to the slider chuck 1 by a thread, and the bottom protrusion of the slider chuck 1 is embedded in the guide groove of the base 2 and can only slide linearly in the axial direction, this axial movement will be completely converted into the axial displacement of the slider chuck 1, thereby realizing the change in distance between the slider chuck 1 and the end of the base 2, and finally causing the retaining ring 7 fixed between the end of the slider chuck 1 and the end of the base 2 to change radially.

[0040] In this structure, the retaining ring 7 is deformed under the push of the slider chuck 1. The wing nut 4 rotates 90° clockwise, which will increase the effective radial expansion of the corresponding retaining ring 7 by about 0.3mm-0.5mm. The deformation is evenly distributed and controlled.

[0041] In an optional embodiment, the threaded engagement between the wing nut 4 and the guide screw 3 has a friction self-locking function. After the wing nut 4 is screwed into the guide screw 3, it contacts the tail end face of the base 2 to form a mechanical stop structure.

[0042] To prevent the guide screw 3 from reversing and causing the retaining ring 7 to spring back due to external interference or vibration when the retaining ring 7 is in the expanded state, this utility model designs a double self-locking structure. First, the threaded engagement between the wing nut 4 and the guide screw 3 has a sufficiently large frictional force to achieve thread self-locking. Second, after the wing nut 4 is screwed into the guide screw 3, it will press against the tail end face of the base 2 to form a mechanical contact stop structure. The two together constitute a self-locking structure to prevent the guide screw 3 from being subjected to force and causing the retaining ring 7 to contract and spring back. Its anti-vibration rebound force is >200N.

[0043] The present application is illustrated below through a specific embodiment:

[0044] S1: Prepare the retaining ring 7, align the hole of the second retaining ring 7 with the second pin hole 6 of the base 2, and insert the second pin;

[0045] S2: Rotate the wing nut 4 to adjust the first pin hole 5 of the slider chuck 1 to the appropriate position;

[0046] S3: Align the hole 7 of the first retaining ring with the first pin hole 5 of the slider chuck 1, and insert the first pin;

[0047] S4: Rotate the wing nut 4 clockwise to cause the retaining ring 7 to undergo radial expansion deformation;

[0048] S5: Place the expanded retaining ring 7 and the retaining ring 7 support fixture together below the iron core shaft hole;

[0049] S6: After the shaft is pressed into the iron core shaft hole, align the expanded retaining ring 7 in the shaft retaining ring groove, and rotate the wing nut 4 in the opposite direction to shrink the retaining ring 7.

[0050] S7. Pull out the first and second pins and remove the retaining ring 7 from the mounting fixture.

[0051] It should be noted that before S6 is executed, the retaining ring 7 is kept in an expanded state by the friction of the threads between the wing nut 4 and the screwed-in guide screw 3, as well as the mechanical stop structure between the wing nut 4 and the tail end face of the base 2.

[0052] The beneficial effects of this utility model are:

[0053] This utility model provides a retaining ring 7 support fixture. This fixture achieves precise elastic deformation control of the retaining ring 7 through the threaded transmission between the wing nut 4 and the guide screw 3, and the sliding engagement of the slider chuck 1 in the guide groove. The fixture allows for assembly by a single person, eliminating the need for multiple people and reducing labor costs by more than 50%. The frictional force between the wing nut 4 and the guide screw 3, and the contact between the wing nut 4 and the tail end face of the base 2, form a mechanical stop structure, which together constitute a self-locking structure to prevent the retaining ring 7 from rebounding or shrinking under the force applied to the guide screw 3. The design of the first pin hole 5, the second pin hole 6, the first pin, and the second pin allows for the assembly of retaining rings 7 of different specifications.

[0054] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A retaining ring support clamp, characterized in that, include: The slider chuck has a protrusion at its bottom; The base is provided with a guide groove that mates with the protrusion of the slider chuck; a center hole is provided at the tail of the base; A guide screw is used to pass through the center hole of the base and be fixedly connected to the slider chuck; A wing nut is threaded to the end of the guide screw; The slider chuck is fixedly connected to one end of the retaining ring; the end of the base is fixedly connected to the other end of the retaining ring. The slider chuck can move axially within the guide groove. By rotating the wing nut, the slider chuck can be driven to generate axial displacement along the guide groove, thereby achieving elastic deformation control of the retaining ring.

2. The retaining ring support fixture according to claim 1, characterized in that: The end of the slider chuck is provided with a first pin hole; the end of the base is provided with a second pin hole; One end of the retaining ring is provided with a first retaining ring hole, which corresponds to the first pin hole; the other end of the retaining ring is provided with a second retaining ring hole, which corresponds to the second pin hole.

3. The retaining ring support fixture according to claim 2, characterized in that, Also includes: The pin includes a first pin and a second pin; the first pin is used to pass through the first retaining ring hole and the first pin hole to fix one end of the retaining ring to the slider chuck; the second pin is used to pass through the second retaining ring hole and the second pin hole to fix the other end of the retaining ring to the base.

4. The retaining ring support fixture according to claim 2, characterized in that: When the wing nut is rotated clockwise, the slider chuck can be driven to produce an axial displacement away from the end of the base along the guide groove; when the wing nut is rotated counterclockwise, the slider chuck can be driven to produce an axial displacement closer to the end of the base along the guide groove.

5. The retaining ring support fixture according to claim 1, characterized in that: The base has a U-shaped structure, including an end, a middle and a tail; the guide groove is located on the middle of the base.

6. The retaining ring support fixture according to claim 1, characterized in that: The threaded engagement between the wing nut and the guide screw has a friction self-locking function.

7. The retaining ring support fixture according to claim 1, characterized in that: After the wing nut is screwed into the guide screw, it contacts the tail end face of the base to form a mechanical stop structure.

8. The retaining ring support fixture according to claim 1, characterized in that: The rotation angle of the wing nut is linearly related to the expansion of the retaining ring. For every 90° clockwise rotation, the retaining ring expands radially by 0.3-0.5 mm.

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