A precision alignment installation device and method for a speed reducer shaft hole

Abstract

The application discloses a precision alignment and installation device and method for a speed reducer shaft hole, relates to the technical field of mechanical assembly, and comprises a pressing disc, one side of the pressing disc is provided with a full-thread pull rod, one side of the pressing disc is provided with a butt joint cover, one side of the butt joint cover is provided with a connecting piece, the top and the bottom of the connecting piece are both provided with a notch extending into the connecting piece, recesses are arranged on the top and the bottom of the full-thread pull rod close to one side of the connecting piece, a movable ring is movably connected to the full-thread pull rod outside the recesses, connecting plates are arranged on the top and the bottom of the movable ring, an internal thread hole is arranged in the pressing disc, and a plurality of groups of external threads are uniformly arranged on the side of the full-thread pull rod close to the connecting piece. The torque wrench is used for controlling the nut tightening torque, the set range is 300-500 N.m, the stable installation with a displacement speed of less than or equal to 1 mm / s is realized, interference fit control can be realized, and the operation space is improved.

Description

Technical Field

[0001] This invention relates to the field of mechanical assembly technology, specifically a device and method for precise alignment and installation of a reducer shaft hole. Background Technology

[0002] A speed reducer is an independent component consisting of gear transmission, worm transmission, or gear-worm transmission enclosed in a rigid housing. It is commonly used as a speed reduction transmission device between the prime mover and the working machine, and plays a role in matching speed and transmitting torque between the prime mover and the working machine or actuator. It is widely used in modern machinery.

[0003] However, existing precise alignment and installation devices for reducer shaft holes require aligning the reducer output shaft hole with the equipment's drive shaft during reducer replacement. Since these are interference fits, traditional methods require manual hammering of the reducer housing with a sledgehammer to achieve this alignment. This method has the following drawbacks: uneven stress can easily damage the reducer bearings, increasing the failure rate by over 30%; the hammering process poses safety hazards, potentially causing injuries; installation accuracy is poor (axis offset ≥ 0.5mm); it is time-consuming and labor-intensive (6 people for 8 hours per unit), resulting in high costs for hydraulic jacking equipment, which is also unusable due to space constraints. Conventional bolt-pulling methods are prone to bolt breakage due to insufficient bolt strength, making them unable to withstand the installation load of heavy reducers, thus reducing their usability. Summary of the Invention

[0004] The purpose of this invention is to solve the technical problem of safely, efficiently, and accurately reinstalling heavy-duty speed reducers in confined spaces, and to avoid equipment damage and personal injury risks caused by manual hammering, by providing a device and method for precise alignment and installation of speed reducer shaft holes.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a precision alignment and installation device for a reducer shaft hole, comprising a pressure disc, wherein a fully threaded tie rod is inserted into one side of the pressure disc;

[0006] The top pressing disc is provided with a docking cover on one side, and a connector is provided on one side of the docking cover. The connector has notches extending into its interior at both the top and bottom.

[0007] The threaded tie rod has grooves on its top and bottom sides near the connector. A movable ring is movably connected to the outside of the threaded tie rod and located in the groove. A connecting plate is provided on the top and bottom of the movable ring.

[0008] As a further embodiment of the present invention: the top pressure disc is provided with an internal threaded hole, and the outside of the fully threaded tie rod is provided with multiple sets of external threads on the side near the connector. The fully threaded tie rod is threadedly connected to the top pressure disc through the mutual cooperation of the internal threaded hole and the external threads.

[0009] As a further embodiment of the present invention: the top and bottom of both ends of the connector are provided with mating holes, one end of the connecting plate is provided with a connecting hole aligned with the mating hole, and the connecting plate is detachably connected to the connector through the mutual cooperation of the connecting hole, the mating hole and the bolt.

[0010] As a further embodiment of the present invention: the inner diameter of the connector is larger than the outer diameter of the movable ring, and the connector and the movable ring are laterally movably connected.

[0011] As a further embodiment of the present invention: the end face of the groove and the top and bottom ends of the movable ring are both parallel cut surfaces, and the movable ring is laterally movablely connected to the fully threaded tie rod through the mutual cooperation of the groove and the parallel cut surfaces.

[0012] As a further aspect of the present invention: the outer diameter of the movable ring on the side near the docking cover decreases sequentially from right to left.

[0013] As a further aspect of the present invention: the method for precise alignment and installation of the reducer shaft hole specifically includes the following steps:

[0014] Step 1: Hoist the reducer to 50mm in front of the drive shaft, ensuring the shaft is horizontal;

[0015] Step 2: Place the pressure disc against the end face of the reducer's output shaft;

[0016] Step 3: Pass the fully threaded tie rod through the center hole of the top pressure disc and screw it into the threaded hole of the shaft head for ≥5 turns;

[0017] Step 4: Insert a 30mm thick flat washer and an M24 heavy nut into the free end of the fully threaded tie rod in sequence.

[0018] Step 5: Tighten the nut in three stages using a hydraulic torque wrench;

[0019] Step 6: Monitor the displacement until the reducer is in place.

[0020] As a further aspect of the present invention: the standard displacement distance for monitoring displacement as described in step six is ​​42±0.1mm.

[0021] Compared with the prior art, the beneficial effects of the present invention are:

[0022] 1. Through dual mechanical optimization: the top pressure disc disperses stress, and the fully threaded tie rod achieves pure axial force application to eliminate radial force, thereby improving its operational stability, increasing installation accuracy, and thus improving utilization rate;

[0023] 2. Space adaptability design: The maximum outer diameter of the device is ≤300mm, which can be operated in a space of ≥400mm×400mm, thus improving the operating space. The tightening torque of the nut can be controlled by a torque wrench, and the setting range is 300-500N·m, which can achieve smooth installation with a displacement speed of ≤1mm / s. Interference fit control can be achieved, which further improves the operating space.

[0024] 3. By utilizing the movable ring, connector, and parallel cut surface, the movable ring can move laterally along this position without rotating. This makes the connection at the threaded end more stable after the subsequent connection is fixed, thus avoiding derailment caused by inertial reversal during deceleration rotation, thereby improving the utilization rate. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the structure of the present invention;

[0026] Figure 2 This is a schematic diagram of the structure of the top pressure disc of the present invention;

[0027] Figure 3 This is a schematic diagram of the structure of the fully threaded tie rod of the present invention;

[0028] In the diagram: 1. Top pressure disc; 101. Docking cover; 102. Connector; 103. Notch; 2. Fully threaded tie rod; 201. Groove; 202. Movable ring; 203. Connecting plate. Detailed Implementation

[0031] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0032] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings and are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element 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 this invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. In the description of this invention, it should be noted that unless otherwise explicitly specified and limited, the terms "installed," "connected," "linked," and "set up" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances. The following describes embodiments of the invention based on its overall structure.

[0033] Please see Figures 1-3 In this embodiment of the invention, a gearbox shaft hole precision alignment and installation device includes a top pressure disc 1, and a fully threaded tie rod 2 is inserted into one side of the top pressure disc 1.

[0034] Among them, a docking cover 101 is provided on one side of the top pressure disc 1, and a connector 102 is provided on one side of the docking cover 101. Both the top and bottom of the connector 102 are provided with notches 103 extending into its interior.

[0035] Among them, the top and bottom of the fully threaded tie rod 2 are provided with grooves 201 on the side near the connector 102, and a movable ring 202 is movably connected to the outside of the fully threaded tie rod 2 and located at the groove 201. A connecting plate 203 is provided on the top and bottom of the movable ring 202.

[0036] Please refer to this carefully. Figures 1 to 3 The top pressure disc 1 has an internal threaded hole, and the fully threaded tie rod 2 has multiple sets of external threads evenly arranged on the side near the connector 102. The fully threaded tie rod 2 is threadedly connected to the top pressure disc 1 through the mutual cooperation of the internal threaded hole and the external threads.

[0037] Please refer to this carefully. Figures 1 to 3 The connector 102 has mating holes at both the top and bottom. One end of the connecting plate 203 has a connecting hole aligned with the mating hole. The connecting plate 203 is detachably connected to the connector 102 through the mutual cooperation of the connecting hole, the mating hole and the bolt.

[0038] Please refer to this carefully. Figures 1 to 3The inner diameter of the connector 102 is larger than the outer diameter of the movable ring 202, and the connector 102 and the movable ring 202 are laterally movably connected.

[0039] In this embodiment, since the inner diameter of the connector 102 is larger than the outer diameter of the movable ring 202, the insertion of the two is simpler.

[0040] Please refer to this carefully. Figures 1 to 3 The end face of the groove 201 and the top and bottom ends of the movable ring 202 are all parallel cut surfaces. The movable ring 202 is laterally connected to the fully threaded tie rod 2 through the mutual cooperation of the groove 201 and the parallel cut surfaces. The set parallel cut surfaces allow the movable ring 202 to move laterally along this position, but it will not rotate. This makes the connection at the threaded end more stable after the subsequent connection is fixed, thereby avoiding the phenomenon of derailment caused by inertial reversal during deceleration rotation, thus improving the utilization rate.

[0041] Please refer to this carefully. Figures 1 to 3 The outer diameter of the active ring 202 on the side closest to the docking cover 101 decreases sequentially from right to left.

[0042] Please refer to this carefully. Figures 1 to 3 The method for precise alignment and installation of the reducer shaft hole specifically includes the following steps:

[0043] Step 1: Hoist the reducer to 50mm in front of the drive shaft, ensuring the shaft is horizontal;

[0044] Step 2: Place the top pressure disc 1 against the end face of the reducer output shaft;

[0045] Step 3: Pass the fully threaded tie rod 2 through the center hole of the top pressure disc 1 and screw it into the shaft head threaded hole for ≥5 turns;

[0046] Step 4: Insert a 30mm thick flat washer and an M24 heavy nut into the free end of the fully threaded tie rod 2 in sequence;

[0047] Step 5: Tighten the nut in three stages using a hydraulic torque wrench (200 N·m → 400 N·m → 500 N·m).

[0048] Step 6: Monitor the displacement until the reducer is in place. The standard displacement distance for monitoring the displacement is 42±0.1mm.

[0049] The working principle of this invention is as follows: In use, the end of the fully threaded tie rod 2 with the external thread extends into the interior of the connector 102 and directly into the interior of the mating cover 101, where it is threadedly connected to the internal threaded hole. Then, the movable ring 202 moves to the left along the notch 103 on the connector 102, allowing the connecting plate 203 to move better within the notch 103. Under the action of the movable ring 202, the connecting plate 203 moves to the left along the groove 201 until the connecting hole on the connecting plate 203 aligns with the mating hole on the connector 102. The connection is then made using bolts, thereby ensuring a more secure connection between the fully threaded tie rod 2 and the top pressure disc 1.

[0050] The above description is merely a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A precision alignment and installation device for a reducer shaft hole, comprising a pressure disc (1), characterized in that, A fully threaded tie rod (2) is inserted into one side of the top pressure disc (1); Among them, a docking cover (101) is provided on one side of the top pressure disc (1), and a connector (102) is provided on one side of the docking cover (101). The top and bottom of the connector (102) are provided with notches (103) extending into its interior. Among them, the top and bottom of the fully threaded tie rod (2) are provided with grooves (201) on the side near the connector (102), and a movable ring (202) is movably connected to the outside of the fully threaded tie rod (2) and located in the groove (201). A connecting plate (203) is provided on the top and bottom of the movable ring (202).

2. The precise alignment and installation device for a reducer shaft hole according to claim 1, characterized in that, The top pressure disc (1) has an internal threaded hole inside, and the outside of the fully threaded tie rod (2) near the connector (102) is uniformly provided with multiple sets of external threads. The fully threaded tie rod (2) is threadedly connected to the top pressure disc (1) through the mutual cooperation of the internal threaded hole and the external threads.

3. The precise alignment and installation device for a reducer shaft hole according to claim 1, characterized in that, The connector (102) has mating holes at both ends, and the connecting plate (203) has a connecting hole aligned with the mating hole at one end. The connecting plate (203) is detachably connected to the connector (102) through the mutual cooperation of the connecting hole, the mating hole and the bolt.

4. The precise alignment and installation device for a reducer shaft hole according to claim 1, characterized in that, The inner diameter of the connector (102) is larger than the outer diameter of the movable ring (202), and the connector (102) and the movable ring (202) are laterally movable.

5. The precise alignment and installation device for a reducer shaft hole according to claim 1, characterized in that, The end face of the groove (201) and the top and bottom ends of the movable ring (202) are all parallel cut surfaces. The movable ring (202) is laterally movablely connected to the fully threaded tie rod (2) through the mutual cooperation of the groove (201) and the parallel cut surfaces.

6. The precise alignment and installation device for a reducer shaft hole according to claim 1, characterized in that, The outer diameter of the movable ring (202) on the side near the docking cover (101) decreases from right to left.

7. A method for precise alignment and installation of a reducer shaft hole, characterized in that, The method for precise alignment and installation of the reducer shaft hole specifically includes the following steps: Step 1: Hoist the reducer to 50mm in front of the drive shaft, ensuring the shaft is horizontal; Step 2: Place the top pressure disc (1) against the end face of the reducer output shaft; Step 3: Pass the fully threaded tie rod (2) through the center hole of the top pressure disc (1) and screw it into the shaft head threaded hole for ≥5 turns; Step 4: Insert a 30mm thick flat washer and an M24 heavy nut into the free end of the fully threaded tie rod (2); Step 5: Tighten the nut in three stages using a hydraulic torque wrench; Step 6: Monitor the displacement until the reducer is in place.

8. The device and method for precise alignment and installation of a reducer shaft hole according to claim 7, characterized in that, According to step six, the standard displacement distance for monitoring displacement is 42±0.1mm.

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