A tensioning device for a grease seal at an end face

Abstract

The utility model relates to sealing ring bonding technical field discloses a kind of tensioning device for grease sealing ring end face, including cable mechanism and the clamping mechanism being arranged in sealing ring end face both sides, cable mechanism includes cable, and one end of cable is connected on clamping mechanism, and the other end of cable is connected with locking buckle, and the locking buckle is detachably connected on another clamping mechanism;Clamping mechanism includes upper pressing block and lower pressing block, and upper pressing block and lower pressing block are detachably connected, and upper pressing block and lower pressing block are enclosed to form cavity, and sealing ring is located in the cavity, and the side of upper pressing block close to cavity is formed with recess, and recess extends into cavity and is formed with the protruding block for limiting sealing ring lateral displacement;Upper pressing block and lower pressing block are combined to form adjusting portion at locking piece, and adjusting portion is provided with adjusting block for adjusting the clamping degree of upper pressing block and lower pressing block to sealing ring.The utility model intends to solve the problem of unstable clamping force caused by wear of bolt guide rod structure in the prior art.

Description

Technical Field

[0001] This utility model relates to the field of sealing ring bonding, specifically to a tensioning device for the end face of a grease sealing ring. Background Technology

[0002] In the field of industrial equipment maintenance, split-type sealing rings are widely used in bearing grease sealing applications due to their ease of installation and replacement. Their bonding requires specialized tooling. This type of tooling typically includes core structural components: a pair of clamping blocks for holding the two separate ends of the sealing ring, with the blocks precisely aligned with the ring's end faces for positioning; a guide structure to direct the clamping blocks' movement, ensuring precise alignment of the bonding sections at the two ends; a power transmission component to drive the clamping blocks towards each other, using external force to bring the sealing ring ends together and maintain a clamped state; and a locking component to lock the clamping blocks in place, maintaining a stable clamping force during bonding to ensure bonding quality.

[0003] Chinese Patent Publication No. CN203680130U discloses a tooling for bonding split sealing rings. Its specific structure includes a pair of clamping blocks for fixing the two ends of the split sealing ring. The mating surfaces of the clamping blocks and the ends of the sealing ring are designed to ensure clamping stability. The pair of clamping blocks are connected by a guide rod, and the clamping blocks can slide towards each other along the axial direction of the guide rod. Simultaneously, structural limiting ensures no relative rotation between the clamping blocks and the guide rod, thereby achieving precise alignment of the sealing ring bonding section. This tooling can lock the position of the clamping blocks using an additional locking component, ensuring uniform force across all areas during bonding of the two ends of the sealing ring, thereby improving bonding strength and sealing performance.

[0004] The existing technology described above, which uses bolts and guide rods to pull the clamping blocks closer together, has significant drawbacks. First, the bolt tightening force is difficult to control precisely, easily leading to uneven stress on the bonding surface. This can result in excessive or insufficient local pressure, affecting the uniform distribution and curing effect of the adhesive, thereby reducing bonding strength and sealing reliability. Second, operational adaptability is limited. The length and diameter of the guide rod are fixed, making it impossible to adjust the clamping block spacing according to the size of different sealing rings. Furthermore, bolt tightening relies on the operator's feel to control the clamping force; too loose a fit can lead to incomplete adhesion, while too tight a fit can cause deformation of the sealing ring or damage to the clamping blocks. Third, structural stability is lacking. After long-term use, the threaded fit between the bolts and the guide rod is prone to wear, causing the clamping blocks to loosen under stress and making it impossible to maintain a stable clamping state. This is particularly problematic in scenarios requiring extremely high sealing precision, such as bearing grease seals, making it difficult to meet long-term reliable maintenance needs. Utility Model Content

[0005] The present invention aims to provide a tensioning device for the end face of a grease seal ring, in order to solve the problem of unstable clamping force caused by wear in the bolt guide rod structure in the prior art.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: A tensioning device for the end face of a grease-sealed ring includes a cable mechanism and clamping mechanisms disposed on both sides of the end face of the sealing ring. 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 clamping mechanism includes an upper pressure block and a lower pressure block, which are detachably connected and form a cavity by the upper and lower pressure blocks. The sealing ring is located in the cavity. A groove is formed on the side of the upper pressure block near the cavity, and a protrusion is formed in the groove extending into the cavity to limit the lateral movement of the sealing ring. An adjustment part is formed by the upper and lower pressure blocks at the locking part, and an adjustment block is provided in the adjustment part for adjusting the clamping degree of the upper and lower pressure blocks on the sealing ring.

[0007] Beneficial effects: 1. The sealing ring is fixed to both sides of the sealing ring end face by clamping mechanisms on both sides. With the help of the pull cable and locking buckle, the end face of the sealing ring can be driven to move closer under the action of external force. This effectively avoids the problems of misalignment and uneven force distribution of the end face in traditional manual operation, ensuring that the end face of the sealing ring fits tightly. This greatly reduces the risk of grease leakage from the gap of the sealing ring end face, while preventing external dust, moisture and other impurities from entering, extending the effective working cycle of the grease and the service life of the equipment.

[0008] 2. The device can convert external force into a closing force on the end face by pulling the locking buckle close to the clamping mechanism, thereby stretching the cable. At this time, the operation only needs to be applied to the locking buckle to achieve tightening, without the need for complicated tools or multiple steps. Compared with the existing technology that requires rotating bolts to bring the clamping mechanisms on both sides of the sealing end face closer to each other, this solution significantly reduces the difficulty of manual operation.

[0009] 3. The cavity formed by the upper and lower pressure blocks can precisely fit the shape of the sealing ring, achieving a wrap-around clamping effect. This firmly fixes the end face of the sealing ring, preventing it from shifting or rotating during tightening. It provides a stable force base for subsequent force transmission, ensuring the end face fit accuracy. Furthermore, the upper and lower pressure blocks are connected by a locking device, enabling quick installation and disassembly. Simply loosen the locking device to separate the main body and insert the sealing ring, and then close and lock to complete the fixation. No complex alignment is required, significantly reducing the clamping difficulty of the sealing ring and improving assembly efficiency.

[0010] 4. The adjusting block passes through the outer periphery of the locking part. By sliding the adjusting block axially or replacing it with annular adjusting blocks of different thicknesses, the fitting gap between the upper and lower pressure blocks in the adjusting part can be precisely changed: when the gap is reduced, the cavity shrinks and the clamping force increases; when the gap is increased, the cavity expands and the clamping force decreases. It can also be adapted to seals of different materials, from soft rubber to hard metal reinforced seals. This avoids both loose clamping that causes seal displacement and excessive tightness that causes seal deformation, thus meeting diverse assembly precision requirements.

[0011] 5. The protrusions that match the sealing ring can precisely constrain the position of the sealing ring from the side, preventing it from shifting to one side during clamping or stretching, further improving the positioning accuracy of the sealing ring, ensuring that the sealing ring is subjected to uniform force during maintenance, and avoiding local wear or damage to sealing performance caused by shifting.

[0012] Preferably, as an improvement, the side of the protrusion away from the groove is inclined, and the inclined surface abuts against the V-groove of the sealing ring to limit the lateral displacement of the sealing ring.

[0013] Beneficial effects: Preferably, as an improvement, the clamping mechanism on one end face of the sealing ring is provided with a first mounting part, the first mounting part is connected to the lower pressure block, and the top of the first mounting part is provided with a mounting hole for connecting the locking buckle.

[0014] Beneficial effects: The first mounting part is directly connected to the lower pressure block of the clamping mechanism. As the basic load-bearing component of the clamping mechanism, the lower pressure block has stronger structural rigidity and can provide stable installation support for the first mounting part. At the same time, the top mounting hole can achieve precise locking between the first mounting part and the locking buckle through the fastener. When the locking buckle is close to the first mounting part, the position of the locking buckle does not need to be adjusted to achieve fixed installation between the locking buckle and the first mounting part, thus forming a rigid whole without relative displacement.

[0015] Preferably, as an improvement, a first positioning hole for mounting one of the clamp bodies on the tension clamp is formed on the adjacent side of the first mounting part.

[0016] Beneficial effects: The pre-designed first positioning hole eliminates the need for alignment and adjustment between the tensioning pliers and the first mounting part, allowing the pliers to be quickly inserted into the positioning hole for installation, significantly reducing operation time. Secondly, the first positioning hole provides a standardized installation reference for one of the tensioning pliers, creating a rigid connection between the pliers and the first mounting part, preventing slippage or displacement of the tensioning pliers when external force is applied. When the operator applies force through the tensioning pliers, the force is precisely applied to the first mounting part along the pre-designed direction of the positioning hole. Combined with the locking structure of the top mounting hole, this ensures that the external force is efficiently converted into the tension of the locking buckle, solving the problems of easy displacement and difficulty in controlling the force applied by traditional tools, and achieving precise control of the tension force.

[0017] Preferably, as an improvement, the clamping device on the other end face of the sealing ring is provided with a second mounting part, which is connected to the lower pressure block. The second mounting part is provided with a connecting hole, which is connected to one end of the cable.

[0018] Beneficial effects: The second mounting part is directly connected to the lower pressure block of the clamping mechanism, forming a stable force receiving base based on the rigid support of the lower pressure block. The connecting hole is precisely connected to one end of the cable through threads, pins, etc., so that the axial tension transmitted by the cable can reach the lower pressure block directly in the preset direction, thereby driving the clamping mechanism to apply a closing force to the end face of the sealing ring; secondly, the first mounting part is fixed to the locking buckle as a reference, and the locking buckle pulls the rigidly connected cable, which drives the clamping mechanism on the side of the second mounting part to move, ultimately bringing the two ends of the sealing ring together. This makes the connection between the second mounting part and the cable, and between the cable and the locking buckle, form a stable force transmission link, thereby ensuring that components are not prone to loosening or detachment during the tightening process, ensuring operational safety and the durability of the device.

[0019] Preferably, as an improvement, the locking buckle includes an integrally formed body and a bent portion, the bent portion having a fixing hole through which a fastener passes and connects to the first mounting portion; the side of the body away from the bent portion has a connecting portion for connecting a cable, the connecting portion having a tensioning hole, and the other end of the cable passing through the tensioning hole.

[0020] Beneficial effects: The locking buckle body and the bending part are integrally molded, resulting in a strong overall structure and excellent rigidity. The bending part, through fixing holes and fasteners, achieves precise locking with the first mounting part, forming a stable force-bearing anchor point based on the reference positioning of the first mounting part. The connecting part of the body is connected to the cable through tension holes, converting the external force borne by the anchor point into axial tension on the cable. The integrally molded structure avoids force transmission losses caused by component splicing, ensuring that the input force of the first mounting part is transformed into the output force of the cable through the locking buckle, guaranteeing accurate and unbiased force transmission.

[0021] Preferably, as an improvement, the main body is provided with a second positioning hole for mounting another clamp body in the tensioning clamp.

[0022] Beneficial effects: The second positioning hole and the first positioning hole of the first mounting part form symmetrical force application fulcrums. The two clamps of the tensioning clamp can be installed in the two positioning holes respectively, so that the external force is symmetrically input along both sides of the locking buckle. This avoids the eccentric force on the locking buckle caused by unilateral force application, and ensures that the one-piece molded body will uniformly convert the external force into axial tension on the cable. This effectively solves the problem of tension deviation and force transmission loss that may be caused by unilateral force application, and further improves the balance and accuracy of force transmission. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the tensioning device according to an embodiment of the present invention.

[0024] Figure 2 This is a schematic diagram of the tensioning device after it has been tightened in an embodiment of this utility model.

[0025] Figure 3 This is a schematic diagram of the tensioning device being released in an embodiment of this utility model.

[0026] Figure 4 This is a schematic diagram of the locking buckle in an embodiment of the present invention.

[0027] Figure 5 This is a schematic diagram of the clamping mechanism in an embodiment of the present invention.

[0028] The reference numerals in the accompanying drawings include: sealing ring 1, clamping mechanism 2, upper pressure block 21, groove 211, protrusion 212, lower pressure block 22, locking element 23, adjusting block 24, first mounting part 25, mounting hole 251, first positioning hole 252, second mounting part 26, connecting hole 261, locking buckle 3, body 31, second positioning hole 311, bending part 32, connecting part 33, tensioning hole 331, cable 4, and fixing element 5. Detailed Implementation

[0029] The following detailed description illustrates the specific implementation method: Example like Figures 1-3 As shown, this embodiment provides a tensioning device for the end face of a grease seal ring 1, used to tighten and fit the mating end faces of the grease seal ring 1. It includes a locking buckle 3, a cable 4, and clamping mechanisms 2 symmetrically arranged on both sides of the end face of the seal ring 1. Figure 4As shown, the clamping mechanism 2 includes an upper pressure block 21 and a lower pressure block 22. The upper pressure block 21 and the lower pressure block 22 are detachably connected 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 enclose a cavity for clamping the sealing ring 1. A groove 211 is formed on the side of the upper pressure block 21 near the cavity. A protrusion 212 extends into the cavity from the side of the groove 211 near the lower pressure block 22. A first anti-slip part is provided next to the protrusion 212. Block 212 is inclined on the side near the second anti-slip part, and the inclined surface abuts against the V-groove of the sealing ring 1 to limit the lateral movement of the sealing ring 1. The lower pressure block 22 includes a base plate and a support plate. The support plate is fixed on the base plate. The base plate and the support plate fit against the outer side of the sealing ring 1 to prevent the sealing ring 1 from moving. The second anti-slip part is provided on the side of the base plate near the cavity. The first and second anti-slip parts 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. The upper pressure block 21 and the lower pressure block 22 are combined at the locking member 23 to form an adjustment part. The adjustment part is provided with 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. The adjustment block 24 is a wedge-shaped block so that the adjustment part formed by the combination of the upper pressure block 21 and the lower pressure block 22 is also wedge-shaped.

[0030] like Figure 3 As shown, the clamping mechanism 2 on one side of the sealing ring 1 end face is provided with a first mounting part 25, which is connected to the locking buckle 3. A fixing member 5 for locking is provided at the connection. The clamping mechanism 2 on the other side of the sealing ring 1 end face is provided with a second mounting part 26, which is connected to the locking buckle 3 via a cable 4. This allows the locking member 2325 to pull the cable 4 when it approaches the first mounting part 25 under external force, thereby bringing the end faces of the sealing rings 1 closer together. Specifically, the clamping mechanism 2 at one end of the sealing ring 1 has a first mounting part 25 on its lower pressure block 22. The top of this part has a mounting hole 251 for connecting the locking buckle 3; the side has a first positioning hole 252 for accommodating one jaw of the tensioning clamp. The clamping mechanism 2 at the other end of the sealing ring 1 has a second mounting part 26 on its lower pressure block 22. This part has a connecting hole 261 for connecting the cable 4.

[0031] like Figure 5 As shown, the locking buckle 3 includes an integrally formed body 31 and a bent portion 32. The bent portion 32 has a fixing hole through which the fixing member 5 passes and is threadedly connected to the first mounting portion 25. On the side of the body 31 away from the bent portion 32, a connecting portion 33 for connecting the pull cable 4 is provided. The connecting portion 33 has a tensioning hole 331, and the other end of the pull cable 4 passes through the tensioning hole 331. The body 31 has a second positioning hole 311, which cooperates with the first positioning hole 252 to jointly install the two clamps of the tensioning clamp, allowing the operator to pull the pull cable 4 through the tensioning clamp, thereby bringing the end face of the sealing member closer together.

[0032] The working principle of the above technical solution is as follows: First, the upper pressure block 21 and lower pressure block 22 of the two clamping mechanisms 2 are respectively placed on the two ends of the sealing ring 1 to be connected, ensuring that the sealing ring 1 is completely placed in the cavity. Then, the locking member 23 is initially turned. After the adjusting block 24 is inserted into the adjusting part to the appropriate position, the locking member 23 is tightened so that the clamping mechanism 2 firmly clamps the sealing ring 1. At this time, the limiting part 27 and the lower pressure block 22 can completely clamp the sealing member in the cavity. After clamping is completed, one end of the cable 4 is fitted into the connecting hole 261 in the second mounting part 26 on the right clamping mechanism 2, and the other end is connected into the tensioning hole 331 on the locking buckle 3. Then, the two clamping bodies of the tensioning clamp are respectively inserted into the first positioning hole 252 on the first mounting part 25 on the left and the second positioning hole 311 on the body 31 of the locking buckle 3. Next, operate the tension clamp to apply a smooth pushing force, pushing the locking buckle 3 body 31 to move around its connection point with the first mounting part 25, thereby pulling the cable 4 and pulling the right end of the sealing ring 1 to move to the left until the two ends of the sealing ring 1 are tightly and evenly fitted into place. Then, use the fastener 5 to pass through the fixing hole on the bent part 32 and thread it to the first mounting part 25 of the clamping mechanism 2 on the left side of the sealing ring 1; finally, after completing the subsequent permanent fixation while maintaining tension, release the pressure of the tension clamp and disassemble the tension clamp, cable 4, locking buckle 3 and clamping mechanism 2 in reverse order.

[0033] 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 tensioning device for the end face of a grease seal ring, characterized in that: The device includes a cable mechanism and clamping mechanisms located on both sides of the end face of the sealing ring. 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 clamping mechanism includes an upper pressure block and a lower pressure block, which are detachably connected and form a cavity by the upper and lower pressure blocks. The sealing ring is located in the cavity. A groove is formed on the side of the upper pressure block near the cavity, and the groove extends into the cavity to form a protrusion for limiting the lateral movement of the sealing ring. An adjustment part is formed by the upper and lower pressure blocks at the locking part, and an adjustment block is provided in the adjustment part for adjusting the clamping degree of the upper and lower pressure blocks on the sealing ring.

2. The tensioning device for the end face of a grease seal ring according to claim 1, characterized in that: The protrusion is inclined on the side away from the groove, and the inclined surface abuts against the V-groove of the sealing ring to limit the lateral displacement of the sealing ring.

3. A tensioning device for the end face of a grease seal ring according to claim 1, characterized in that: The clamping mechanism on one end face of the sealing ring is provided with a first mounting part, which is connected to the lower pressure block, and the top of the first mounting part is provided with a mounting hole for connecting the locking buckle.

4. A tensioning device for the end face of a grease seal ring according to claim 3, characterized in that: A first positioning hole is formed on the adjacent side of the first mounting part for mounting one of the clamps of the tensioning clamp.

5. A tensioning device for the end face of a grease seal ring according to claim 1, characterized in that: The clamping device on the other end of the sealing ring is provided with a second mounting part, which is connected to the lower pressure block. The second mounting part is provided with a connecting hole, which is connected to one end of the cable.

6. A tensioning device for the end face of a grease seal ring according to claim 3, characterized in that: The locking buckle includes an integrally formed body and a bent portion. The bent portion is connected to the first mounting portion by a fastener. A connecting portion for connecting a cable is provided on the side of the body away from the bent portion. A tensioning hole is provided on the connecting portion, and the other end of the cable passes through the tensioning hole.

7. A tensioning device for the end face of a grease seal ring according to claim 6, characterized in that: The main body is provided with a second positioning hole for installing another clamp body in the tensioning clamp.

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