A tool for bearing grease seal maintenance
Through the coordinated design of tensioning clamps, tensioning mechanisms, and clamping mechanisms, the problems of uncontrollable clamping force and cumbersome operation in existing technologies have been solved, achieving precise alignment and efficient bonding of the sealing ring end faces, and improving the quality and efficiency of seal maintenance.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- CHONGQING RUISI OPERATION & MAINTENANCE TECH CO LTD
- Filing Date
- 2025-09-30
- Publication Date
- 2026-07-24
AI Technical Summary
In existing technologies, tensioning clamps rely on spring force and complex linkage of multiple mechanisms, resulting in uncontrollable clamping force. This affects the uniformity of sealing ring tension and the fit of the bonding surface. The operation is cumbersome and inefficient, and it is difficult to achieve precise alignment and pressure maintenance in narrow spaces.
The system employs a tensioning clamp, a tensioning mechanism, and a clamping mechanism working in tandem. It achieves zero-offset fixation of the sealing ring end face through a cable and a locking buckle, controls the clamping force using an adjusting block, and reduces operational intensity by combining the lever principle, making it suitable for complex maintenance scenarios.
It achieves precise alignment and uniform adhesion of the sealing ring end face, ensuring bonding quality, reducing labor intensity, expanding the scope of application, and improving maintenance efficiency and sealing reliability.
Smart Images
Figure CN224550568U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of sealing ring bonding technology, specifically to a tooling for sealing and maintaining bearings based on grease. Background Technology
[0002] During the maintenance of bearing grease seals, specialized tooling is typically required to ensure the correct installation, tensioning, and fixation of the seal rings to maintain their sealing performance. This type of maintenance tooling generally includes clamping mechanisms, tensioning mechanisms, and positioning mechanisms. The clamping mechanism reliably secures the seal ring, preventing displacement during maintenance; the tensioning mechanism applies appropriate tension to the seal ring to facilitate alignment and fit during installation or bonding; and the positioning mechanism ensures the seal ring is in the correct position during maintenance, preventing misalignment or twisting. The coordinated operation of these structures improves maintenance efficiency and quality, ensuring the sealing reliability of the bearing lubrication system.
[0003] In the prior art, Chinese patent CN112622289B discloses a sealing ring bonding clamp and its usage method. The tensioning clamp part uses a first clamp arm and a second clamp arm connected by a pin hinge, and an automatic clamping mechanism is provided at the tail. This automatic clamping mechanism includes a first handle at the end of the first clamp arm and a second handle at the end of the second clamp arm. A first positioning post and a second positioning post are respectively provided on the inner sidewalls of the first and second handles, and a return spring is provided between the first and second positioning posts. The return spring's elastic force drives the first and second handles to open, thereby enabling the end clamping structure of the first and second clamp arms to perform a clamping action, thus producing a tensioning effect on the sealing ring or sealing strip. In addition, a pressing mechanism is installed on the clamping structure, which uses components such as a U-shaped seat, a pull rod, a pressing spring, and a pressure plate to press and fix the end of the sealing strip to assist in the tensioning and bonding process.
[0004] However, the tensioning clamp in the prior art has the following drawbacks: First, its clamping force depends entirely on the performance of the return spring. Fatigue, aging, or manufacturing differences in the spring can lead to unstable and uncontrollable clamping force, directly affecting the uniformity of the sealing ring tension and the fit of the bonding surface. Second, the solution has a complex structure and is cumbersome to operate. It requires manual control of multiple components such as the pressing mechanism and the clamping mechanism. Adjustment is difficult and operation is inconvenient in the narrow bearing installation space, resulting in low maintenance efficiency. Finally, the coordination of multiple mechanisms is poor, the force transmission path is not direct, and it is difficult to achieve accurate and stable alignment and pressure holding of the sealing ring end face. Utility Model Content
[0005] The present invention aims to provide a tooling for bearing grease sealing maintenance, in order to solve the problem that the clamping force of the tensioning clamp, which relies on the spring force and complex linkage of multiple mechanisms, is uncontrollable, which in turn leads to deformation or local gaps at the end face of the sealing ring.
[0006] To achieve the above objectives, the present invention adopts the following technical solution: A tooling for bearing grease-based seal maintenance includes a tensioning clamp, a tensioning mechanism, and clamping mechanisms mounted on both sides of the end face of a sealing ring. The tensioning mechanism includes a cable, one end of which is connected to the clamping mechanism, and the other end of which is connected to a locking buckle, which is detachably connected to another clamping mechanism. The tensioning clamp includes two clamping bodies hinged to each other, one clamping body being installed inside the locking buckle, and the other clamping body being connected to another clamping mechanism so that when an external force is applied to the end of the clamping body, it can drive the locking buckle closer to the other clamping mechanism, thereby bringing the end face of the sealing ring closer. The clamping mechanism includes an upper pressure block and a lower pressure block for clamping the sealing ring. The upper and lower pressure blocks are detachably connected, and an adjustment part is provided at the connection point. The adjustment part is provided with an adjustment block for adjusting the clamping degree of the upper and lower pressure blocks on the sealing ring.
[0007] Beneficial effects: 1. This tooling, through the coordinated work of tensioning clamps, tensioning mechanisms, and clamping mechanisms, establishes positioning and tensioning functions. After applying adhesive to the end face of the sealing ring, the clamping mechanisms on both sides can achieve non-offset fixing of the sealing surface through the matching design of the upper and lower pressure blocks. Combined with the linear force transmission characteristics of the tensioning mechanism, it can accurately align the sealing end face and maintain a uniform fit, avoiding the problems of deformation or local gaps at the bonding point of the sealing ring end face due to uneven force in traditional manual operation.
[0008] 2. The locking buckle at the end of the cable can form a rigid lock with the clamping mechanism after tensioning, achieving a seamless connection between tensioning and pressure holding. It can stably maintain the sealing surface contact pressure until the adhesive is completely cured, avoiding the cracking of the adhesive layer caused by temporary loosening during manual operation. This ensures that the bearing after sealing maintenance can still maintain reliable sealing performance under complex working conditions such as vibration and temperature fluctuations, extending the service life of the equipment.
[0009] 3. The adjusting block can be pushed or pulled out within the adjusting section to change the distance between the upper and lower pressure blocks, thereby precisely controlling the clamping force on the sealing ring. Compared to a fixed clamping structure, it can adapt to sealing rings of different thicknesses and materials, avoiding damage to the sealing ring due to excessive clamping force or clamping failure due to insufficient clamping force, significantly improving the adaptability and flexibility of the tooling.
[0010] 4. The hinged structure of the tensioning pliers creates a highly efficient lever. Operators only need to apply a small gripping force to drive the locking buckle and pull the cable, converting the force into sealing pressure. Compared to the manual tightening method using traditional tools like wrenches, this design significantly reduces labor intensity.
[0011] 5. The flexible force transmission characteristics of the cable enable the tooling to adapt to complex maintenance scenarios such as narrow spaces in bearing housings and high-altitude parts of equipment, and the sealing operation can be completed without large-scale disassembly of the equipment; at the same time, the compact design of the upper and lower pressure blocks can penetrate deep into the sealing groove to achieve precise clamping, avoiding the problem of inadequate maintenance due to limited operating space, and expanding the applicability of the tooling.
[0012] Preferably, as a further improvement, the upper pressure block and the lower pressure block are locked and fixed by a locking member. The upper pressure block and the lower pressure block form a cavity by enclosing each other. The sealing ring is located in the cavity. A groove is formed on the side of the upper pressure block near the cavity. A protrusion is formed on the side of the groove near the lower pressure block into the cavity. A first anti-slip part is provided next to the protrusion. The side of the protrusion near the second anti-slip part is inclined and the inclined surface abuts against the V-groove of the sealing ring to limit the lateral movement of the sealing ring. A second anti-slip part is provided on the side of the lower pressure block near the cavity.
[0013] Beneficial effects: The cavity formed by the upper and lower pressure blocks can firmly cover and clamp the sealing ring from both the top and bottom, preventing it from coming out under force. The first and second anti-slip parts greatly increase the friction between the clamping mechanism and the surface of the sealing ring, effectively solving the slippage problem that may occur between the clamping mechanism and the sealing ring during the tightening process. This ensures the effective transmission of the tightening force and the stability of the sealing ring position, thereby guaranteeing the accuracy of the end face mating.
[0014] Preferably, as a further improvement, one of the clamping mechanisms is provided with a first mounting part, which is connected to the lower pressure block, and the first mounting part is provided with a first positioning hole for mounting one of the clamp heads.
[0015] Beneficial effects: The first mounting part and its first positioning hole provide a stable and reliable force application point for the tensioning pliers, enabling the tensioning pliers to connect with the clamping mechanism quickly and accurately, directly and efficiently converting the tension of the pliers head into a tightening action on the sealing ring, simplifying the installation process and improving the operational convenience and force transmission efficiency of the entire tooling.
[0016] Preferably, as a further improvement, another clamping mechanism is provided with a second mounting part, which is connected to the lower pressure block, and the second mounting part is provided with a connection hole for mounting the cable.
[0017] Beneficial effects: The connecting holes of the second mounting part provide a fixed connection point for the cable, ensuring that the tensioning mechanism can be stably connected to the clamping mechanism on the other side, preventing parts from falling off during the tensioning process, and ensuring the integrity of the overall tooling structure and the safety of use.
[0018] Preferably, as a further improvement, the locking buckle includes an integrally formed body and a fitting part, the fitting part being connected to the first mounting part by a fastener; a connecting part for connecting a tensioning rope is provided on the side of the body away from the fitting part, the connecting part being provided with a tensioning hole, one end of the rope being connected to the tensioning hole, and the other end being connected to the connecting hole on the second mounting part.
[0019] Beneficial effects: By using tensioning clamps to bring the locking buckle closer to the first mounting part, and after the end face of the sealing ring is in contact, the locking buckle is fixed to the first mounting part using fasteners. This ensures that the end face of the sealing ring remains in a stable contact state, ensuring that the instant adhesive is fully cured and avoiding sealing failure caused by end face misalignment during the curing process, thus significantly improving bonding quality and sealing reliability. Secondly, the one-piece molding structure of the locking buckle ensures stable mechanical properties. The tensioning hole of the connecting part matches the connecting hole of the second mounting part, allowing the tension of the cable to be transmitted in an orderly manner along the path of the cable, locking buckle, first mounting part, and clamping mechanism, avoiding uneven local stress caused by tension dispersion, ensuring synchronous movement of the clamping mechanisms on both sides, and improving the flatness of the end face contact.
[0020] Preferably, as a further improvement, a second positioning hole is formed on the body for mounting another clamp.
[0021] Beneficial effects: The second positioning hole provides a standardized installation position for the other jaw of the tensioning pliers, enabling the jaw to connect accurately and stably with the locking buckle, avoiding deviation in the direction of force caused by jaw installation misalignment, ensuring that the force applied by the tensioning pliers can effectively drive the locking buckle to move, thereby achieving precise proximity of the sealing ring end face.
[0022] Preferably, as a further improvement, the two clamp bodies are connected by a pin. A bent portion is provided at one end of the clamp body near the pin, and a clamp head is provided on the side of the bent portion away from the clamp body. One clamp head is connected to a tensioning mechanism, and the other clamp head is connected to a clamping mechanism on one side. A handle is provided at the end of the clamp body away from the clamp head. When an external force is applied to grip the handle on the two clamp heads, it can drive the tensioning mechanism connected to the clamp head to move closer to the clamping mechanism connected to the other clamp head.
[0023] Beneficial effects: The tensioning pliers utilize a lever principle for effortless operation. The offset pin from the center of the pliers body allows operators to generate significant clamping force with minimal gripping force, easily tightening the sealing ring end face, improving operational efficiency and reducing labor intensity. Simultaneously, the bent section design enables better engagement of the pliers head with the tensioning and clamping mechanisms, ensuring a stable and reliable tensioning process.
[0024] Preferably, as a further improvement, the included angle between the bent part and the clamp body is 90°-145°.
[0025] Beneficial effects: The included angle range of (90-145)° can avoid spatial interference between the clamp body and components such as the sealing ring and clamping mechanism, ensuring that operators can still grip the handle smoothly for operation in narrow installation environments such as bearings. Compared with structures without bends or with unreasonable included angles, it significantly improves the applicability of tooling in complex scenarios. Attached Figure Description
[0026] Figure 1 This is a structural schematic diagram of an embodiment of the present utility model.
[0027] Figure 2 This is a schematic diagram of the bending part of the tensioning clamp in an embodiment of this utility model.
[0028] Figure 3 This is a schematic diagram of the tensioning clamp according to an embodiment of the present invention.
[0029] Figure 4 This is a side view of the tensioning clamp in an embodiment of the present invention.
[0030] Figure 5 This is a schematic diagram of the clamping mechanism in an embodiment of the present invention.
[0031] Figure 6 This is a cross-sectional view of the clamping mechanism in an embodiment of the present invention.
[0032] Figure 7 This is a schematic diagram of the tensioning mechanism in an embodiment of the present invention.
[0033] Figure 8 This is a schematic diagram of the tension buckle in an embodiment of the present invention.
[0034] The reference numerals in the accompanying drawings include: sealing ring 1, clamping mechanism 2, upper pressure block 21, groove 211, protrusion 212, first anti-slip part 213, lower pressure block 22, second anti-slip part 221, locking part 23, adjusting block 24, first mounting part 25, first positioning hole 251, second mounting part 26, connecting hole 261, locking buckle 3, body 31, second positioning hole 311, fitting part 32, connecting part 33, cable 4, tensioning pliers 5, pliers body 51, bending part 52, pliers head 53, pin 54, handle 55. Detailed Implementation
[0035] The following detailed description illustrates the specific implementation method: The basic implementation examples are as follows: Figure 1 As shown: This embodiment provides a bearing grease-based sealing maintenance fixture for tightening and fitting the end face of the sealing ring 1. It includes a tensioning clamp 5, a tensioning mechanism, and clamping mechanisms 2 installed on both sides of the end face of the sealing ring 1. Figure 2 and Figure 3 As shown, in this embodiment, the tensioning clamp 5 includes two clamp bodies 51 that are hinged together. A pin 54 is provided at the hinge point. To facilitate operation and reduce effort, the pin 54 is offset from the center of the clamp body 51 and located at one end of the clamp body 51. A bent portion 52 is provided at the end of the clamp body 51 near the pin 54. The included angle between the bent portion 52 and the clamp body 51 is 90°-145°. In this embodiment, the included angle is 110°. A clamp head 53 is provided on the side of the bent portion 52 away from the clamp body 51. One clamp head 53 is connected to the tensioning mechanism, and the other clamp head 53 is connected to the clamping mechanism 2 on one side. Figure 4 As shown, to facilitate the installation of the pliers head 53 into the positioning hole, the pliers head 53 is horizontal, and an angle of 160° is formed between the pliers head 53 and the bent portion 52. A handle 55 is provided at the end of the pliers body 51 away from the pliers head 53. When external force is applied to grip the handles 55 on both pliers head 53, it can bring the tensioning mechanism connected to the pliers head 53 closer to the clamping mechanism 2 connected to the other pliers head 53, thereby bringing the end faces of the sealing ring 1 closer together. Since the handles 55 of the tensioning pliers 5 need to be close together, a bent portion is provided in the middle of one of the pliers body 51. It is worth noting that in this embodiment, one side of the tensioning pliers body 51 is a one-piece molded structure.
[0036] like Figure 5 As shown, the clamping mechanisms 2 on both sides of the end face of the sealing ring 1 each include an upper pressure block 21 and a lower pressure block 22. The upper pressure block 21 and the lower pressure block 22 are locked and fixed by a locking member 23. In this embodiment, the locking member 23 is a bolt. The upper pressure block 21 and the lower pressure block 22 form a cavity by enclosing each other. The sealing ring 1 is located in this cavity. The upper pressure block 21 has a groove 211 formed on the side near the cavity. The groove 211 extends into the cavity to form a protrusion 212. A first anti-slip part 213 is provided next to the protrusion 212. The side of the protrusion 212 near the first anti-slip part 213 is inclined, and the inclined surface abuts against the V-groove of the sealing ring 1 to limit the lateral movement of the sealing ring 1. A second anti-slip part 221 is provided on the side of the lower pressure block 22 near the cavity. Figure 6 As shown, in order to prevent slippage when the clamping mechanism 2 moves the sealing ring 1, both the upper pressure block 21 and the lower pressure block 22 are provided with multiple first anti-slip parts 213 and second anti-slip parts 221. The first anti-slip parts 213 and the second anti-slip parts 221 are evenly arranged along the width direction of the upper pressure block 21 and extend along the length direction of the upper pressure block 21.
[0037] like Figure 5As shown, the upper pressure block 21 has a sloping surface on the side away from the groove 211. This sloping surface and the top of the lower pressure block 22 combine to form an adjustment section. The adjustment section contains an adjustment block 24 for adjusting the clamping degree of the upper pressure block 21 and the lower pressure block 22 on the sealing ring 1. In this embodiment, the adjustment block 24 is a wedge-shaped block. To prevent the wedge-shaped block from interfering with the locking member 23 when it slides in the adjustment section, a U-shaped groove is provided in the middle of the wedge-shaped block.
[0038] like Figure 7 As shown, the clamping mechanism 2 located on one end face of the sealing ring 1 is provided with a first mounting part 25, which is welded to the lower pressure block 22, and the first mounting part 25 is provided with a first positioning hole 251 for mounting the clamping head 53. The clamping mechanism 2 located on the other end face of the sealing ring 1 is provided with a second mounting part 26, which is welded to the lower pressure block 22, and the second mounting part 26 is provided with a connecting hole 261 for mounting the cable 4.
[0039] like Figure 7 and Figure 8 As shown, the tensioning mechanism includes a cable 4 and a locking buckle 3. The locking buckle 3 includes an integrally formed body 31 and a bent portion 52. The body 31 has a second positioning hole 311 for mounting a clamp head 53. The fitting portion 32 is connected to the first mounting portion 25 by a fastener. Specifically, the intersection of the bending section and the fitting section of the fitting portion 32 is on the same vertical line as the outer periphery of the body 31. The fitting section fits into the first mounting portion 25 and is connected by a fastener. In this embodiment, the fastener is a bolt. A connecting portion 33 for connecting the tensioning rope is provided on the side of the body 31 away from the fitting portion 32. The connecting portion 33 has a tensioning hole. One end of the cable 4 is connected to the tensioning hole, and the other end is connected to the connecting hole 261 on the second mounting portion 26. In this embodiment, the cable 4 is a tensioning rope. In other examples besides this embodiment, the cable 4 can also be made of wire.
[0040] In actual use, firstly, place the upper pressure block 21 and the lower pressure block 22 on the outer surface of the sealing ring 1 and pre-lock them using the locking member 23. Then, place the adjusting block 24 in the adjusting part composed of the upper pressure block 21 and the lower pressure block 22, and push or pull out the adjusting block 24 so that the upper pressure block 21 and the lower pressure block 22 can clamp the sealing ring 1. Then, tighten the locking member 23. Similarly, install the clamping mechanism 2 on the other side of the end face of the sealing ring 1, requiring that the first mounting part 25 and the second mounting part 26 in the clamping mechanisms 2 on both sides are set opposite to each other. Then, connect one end of the cable 4 to the second mounting part 26 and install the other end in the connecting hole 261 of the locking buckle 3. Then, install the two clamp heads 53 of the tensioning clamp 5 into the first positioning holes 25 of the first mounting part 25 respectively. The clamping head 53 is inserted into the second positioning hole 311 of the locking buckle 3 body 31 so that when the operator grips the handle 55, the clamping head 53 can drive the locking buckle 3 to approach the first mounting part 25. After it is fully approached, the fixing member passes through the mounting hole provided on the locking buckle 3 fitting part 32 and is threadedly connected to the fixing hole on the first mounting part 25, so that the end faces of the sealing ring 1 are in contact with each other and maintain stable adhesion. Before gripping the handle 55, the operator also needs to apply instant adhesive to the end face of the sealing ring 1. After the end face of the sealing ring 1 is bonded, the tensioning clamp 5 is removed and the bonding seam of the sealing ring 1 is polished. After polishing, the tensioning clamp 5 is installed. At this time, the tensioning clamp 5 is in a gripped state. The fixing member is removed and the tensioning clamp 5 is slowly released. Then, the clamping mechanism 2 and the tensioning device are removed in sequence.
[0041] The above descriptions are merely embodiments of this utility model. Commonly known technical solutions and / or characteristics are not described in detail here. It should be noted that those skilled in the art can make various modifications and improvements without departing from the technical solution of this utility model. These modifications and improvements should also be considered within the scope of protection of this utility model, and will not affect the effectiveness of the implementation of this utility model or the practicality of the patent. The scope of protection claimed in this application should be determined by the content of its claims, and the specific embodiments described in the specification can be used to interpret the content of the claims.
Claims
1. A tooling for bearing grease-based sealing and maintenance, characterized in that: The device includes a tensioning clamp, a tensioning mechanism, and clamping mechanisms installed on both sides of the sealing ring end face. The cable mechanism includes a cable, one end of which is connected to the clamping mechanism, and the other end of which is connected to a locking buckle, which is detachably connected to another clamping mechanism. The tensioning clamp includes two clamping bodies that are hinged to each other. The two clamping bodies are detachably connected to the locking buckle and the other clamping mechanism, respectively, so that when an external force is applied to the end of the clamping body, it can drive the locking buckle to move closer to the other clamping mechanism, thereby causing the sealing ring end face to move closer. The clamping mechanism includes an upper pressure block and a lower pressure block for clamping the sealing ring. The upper pressure block and the lower pressure block are detachably connected, and an adjustment part is provided at the connection. The adjustment part is provided with an adjustment block for adjusting the clamping degree of the upper pressure block and the lower pressure block on the sealing ring.
2. The tooling for bearing grease sealing maintenance according to claim 1, characterized in that: The upper and lower pressure blocks are locked and fixed by locking components. The upper and lower pressure blocks form a cavity by enclosing each other. The sealing ring is located in the cavity. A groove is formed on the side of the upper pressure block near the cavity. The groove extends into the cavity to form a protrusion. A first anti-slip part is provided next to the protrusion. The side of the protrusion near the first anti-slip part is inclined. The inclined surface abuts against the V-groove of the sealing ring to limit the lateral movement of the sealing ring. A second anti-slip part is provided on the side of the lower pressure block near the cavity.
3. The tooling for bearing grease-based sealing maintenance according to claim 2, characterized in that: One of the clamping mechanisms is provided with a first mounting part, which is connected to the lower pressure block, and the first mounting part is provided with a first positioning hole for mounting one of the clamp heads.
4. The tooling for bearing grease-based sealing maintenance according to claim 3, characterized in that: Another clamping mechanism is provided with a second mounting part, which is connected to the lower pressure block. The second mounting part is provided with a connection hole for installing the cable.
5. The tooling for bearing grease-based sealing maintenance according to claim 4, characterized in that: The locking buckle includes an integrally formed body and a fitting part. The fitting part is connected to the first mounting part by a fastener. A connecting part for connecting a tension rope is provided on the side of the body away from the fitting part. The connecting part is provided with a tension hole. One end of the rope is connected to the tension hole, and the other end is connected to the connecting hole on the second mounting part.
6. The tooling for bearing grease-based sealing maintenance according to claim 5, characterized in that: The main body has a second positioning hole for mounting another clamp body.
7. The tooling for bearing grease-based sealing maintenance according to claim 1, characterized in that: The clamp body has a bent section at one end near the pin, and a clamp head is located on the side of the bent section away from the clamp body. One clamp head is connected to the tensioning mechanism, and the other clamp head is connected to the clamping mechanism on one side. A handle is located at the end of the clamp body away from the clamp head. When an external force is applied to grip the handles on the two clamp heads, it can drive the tensioning mechanism connected to the clamp head to move closer to the clamping mechanism connected to the other clamp head.
8. The tooling for bearing grease-based sealing maintenance according to claim 7, characterized in that: The included angle between the bent part and the clamp body is 90°-145°.