A tool for assembling and disassembling a large swing arm spindle

Abstract

The utility model relates to mechanical assembly and maintenance technical field, concretely is a kind of tool for big swing arm main shaft assembly disassembly, for the installation hole in big swing arm is installed to main shaft or is disassembled from it, the tension ring is sleeved on the main shaft, and it includes: operating side locking disc, for abutting at the operating side end surface of big swing arm, operating side locking hole and operating side disassembly hole are set on it;Guide block, for setting in the drive side of big swing arm;Drive side locking disc, for setting in the side of guide block away from big swing arm, drive side locking hole and drive side disassembly hole are set on it;Connecting screw, one end is connected with the operating side locking disc, and the other end is connected with the guide block.It can accurately, efficiently complete the assembly, locking and disassembly operation of main shaft and tension ring, while guaranteeing the circumferential installation accuracy of main shaft.

Description

Technical Field

[0001] This utility model relates to the field of mechanical assembly and maintenance technology, specifically a tooling for assembling and disassembling the main shaft of a large swing arm. Background Technology

[0002] In engineering machinery or heavy equipment, the main shaft of a large swing arm is typically fixedly connected to the swing arm mounting hole via a tension ring. The tension ring generally consists of an inner ring and an outer ring with a tapered fit. Axial relative movement causes the inner and outer rings to expand radially, thereby locking the main shaft within the swing arm hole. During assembly, precise control of the axial pressing amount of the inner and outer rings is required to ensure the tension ring expands evenly and locks the main shaft. During disassembly, the inner ring needs to be pulled out from the outer ring to release the locking mechanism.

[0003] Without specialized tooling, operators often need to use hammering, prying, and other methods for assembly and disassembly. This is not only labor-intensive and inefficient, but also prone to causing deformation of the tension ring, scratches on the spindle surface, or damage to the swing arm mounting holes, affecting assembly accuracy and equipment lifespan. Furthermore, the spindle and swing arm typically have strict circumferential positioning requirements, making it difficult to guarantee the accuracy of assembly angles manually.

[0004] Therefore, there is an urgent need for a special tooling that can achieve precise assembly, reliable locking, and convenient, non-destructive disassembly of the spindle and tensioning ring. Utility Model Content

[0005] In view of the deficiencies of the prior art, this utility model provides a tooling for assembling and disassembling the main shaft of a large swing arm, which can accurately and efficiently complete the assembly, locking and disassembly of the main shaft and the tensioning ring, while ensuring the circumferential installation accuracy of the main shaft.

[0006] To achieve the above objectives, the present invention provides a tooling for assembling and disassembling the main shaft of a large swing arm. This tooling is used to install the main shaft into or remove it from the mounting hole of the large swing arm. A tensioning ring is fitted onto the main shaft. The tooling includes: an operating-side locking plate for abutting against the operating-side end face of the large swing arm, having an operating-side locking hole and an operating-side disassembly hole; a guide block for being positioned on the driving side of the large swing arm; a driving-side locking plate for being positioned on the side of the guide block opposite to the large swing arm, having a driving-side locking hole and a driving-side disassembly hole; a connecting screw, one end connected to the operating-side locking plate and the other end connected to the guide block; a tensioning screw for engaging with the operating-side disassembly hole and the driving-side disassembly hole; and a set screw for engaging with the operating-side locking hole and the driving-side locking hole.

[0007] In the above technical solution, the operating-side locking disc and the guide block are connected as a whole by connecting screws, forming an axial clamping frame spanning both sides of the large swing arm. The drive-side locking disc is located on the outside of the guide block and is tightened and fixed to the guide block by tensioning screws. When assembling the spindle, the set screws are screwed into the operating-side locking hole and the drive-side locking hole respectively, pushing the inner or outer ring of the tension ring, causing relative axial displacement between the inner and outer rings, achieving radial expansion and spindle locking. When disassembling the spindle, the tensioning screw passes through the operating-side disassembly hole or the drive-side disassembly hole and connects to the threaded hole on the inner ring of the tension ring. Tightening the tensioning screw allows the inner ring to be pulled out, releasing the lock.

[0008] Furthermore, the operating side locking plate is provided with an operating side positioning pin, which is used to insert into a pin hole at one end of the spindle. Through the insertion and engagement of the operating side positioning pin with the spindle pin hole, circumferential positioning between the operating side locking plate and the spindle is achieved, preventing relative rotation of the spindle during operation.

[0009] Furthermore, the guide block is provided with a drive-side positioning pin, which is used to insert into a pin hole at the other end of the spindle. Through the insertion and engagement of the drive-side positioning pin with the pin hole at the other end of the spindle, circumferential positioning between the guide block and the spindle is achieved, ensuring the angular correspondence between the operating-side locking disc and the guide block.

[0010] Furthermore, it also includes a positioning block, which is operably associated with the operating side locking disc via bolts, for engaging with a retaining ring positioning plate on the large swing arm to position the circumferential angle of the spindle. When the spindle assembly is inserted into the mounting hole of the large swing arm, the alignment of the positioning block and the retaining ring positioning plate ensures accurate circumferential mounting angle of the spindle on the swing arm.

[0011] Furthermore, the operating side locking plate is provided with at least two operating side screw standby holes, and the driving side locking plate is provided with at least two driving side screw standby holes. The operating side screw standby holes and the driving side screw standby holes are used to store the tensioning screw when the fixture is not in operation. Both the operating side screw standby holes and the driving side screw standby holes are evenly distributed in a circumferential pattern. By providing screw standby holes, the loss or confusion of the tensioning screw when not in use can be effectively avoided, and the evenly distributed circumferential layout makes it convenient to pick up and put down the screw when the fixture is placed at different angles.

[0012] Furthermore, there are four driving-side locking holes. Two of the driving-side locking holes are corresponding to the main spindle, and the other two are corresponding to the guide blocks. By setting locking holes corresponding to the main spindle and guide blocks respectively, the pushing position can be selected according to actual needs, improving the adaptability and operational flexibility of the tooling.

[0013] Furthermore, the set screw is a socket head cap screw with a recessed end, and the tensioning screw is a socket head cap screw with a cylindrical head. Using a socket head cap screw with a recessed end as the set screw provides a better pushing effect at its end and is less likely to damage the surface of the part being pushed; using a socket head cap screw with a cylindrical head as the tensioning screw makes it easier to apply a larger tightening torque using a socket head cap wrench.

[0014] Furthermore, during spindle disassembly, the tensioning screw passes through the operating-side disassembly hole or the drive-side disassembly hole to connect with the threaded hole on the inner ring of the tensioning ring. By screwing the tensioning screw into the threaded hole of the inner ring and continuously tightening it, an axial pulling force can be generated to smoothly pull the inner ring out from the outer ring, achieving non-destructive disassembly.

[0015] Furthermore, there are at least two disassembly holes on both the operating side and the driving side, and these holes are evenly distributed in a circumferential pattern. By providing at least two evenly distributed disassembly holes, they can engage with the two symmetrical threaded holes typically provided on the inner ring of the tensioning ring, applying a balanced pulling force and preventing the inner ring from becoming misaligned and jammed during disassembly.

[0016] Furthermore, there are at least two locking holes on the operating side, which are evenly distributed in a circular pattern. By providing multiple evenly distributed locking holes, a pushing force can be applied simultaneously from multiple positions, ensuring that the tensioning ring is subjected to uniform force and guaranteeing the smoothness and reliability of the locking process.

[0017] The beneficial effects of this utility model are: (1) High assembly precision: Through the multiple positioning design of the operating side positioning pin, the drive side positioning pin and the positioning block, the circumferential installation angle between the spindle and the swing arm is ensured to be accurate and meet the assembly precision requirements of the equipment.

[0018] (2) Convenient and efficient operation: The operating side locking plate and guide block are connected as one unit by connecting screws. Locking and disassembly can be completed by using set screws and tension screws respectively. The operation steps are clear and save time and effort.

[0019] (3) Non-destructive disassembly and assembly: The method of using top screw push and tension screw pull is replaced by traditional hammering or prying, which avoids damage to the tension ring, spindle and swing arm mounting holes and extends the service life of the components.

[0020] (4) Anti-loss design: The screw standby hole is set for storing tension screws when not in operation, which effectively prevents the loss of small parts and improves the standardization of tooling management.

[0021] (5) Compact structure and strong adaptability: The tooling has a compact overall structure, making it easy to carry and store; the evenly distributed design of multiple locking holes and disassembly holes can adapt to different working conditions and ensure balanced force application. Attached Figure Description

[0022] Figure 1 This is a front view of the present invention; Figure 2 for Figure 1 AA section view; Figure 3 This is a side view of the present invention; Figure 4 for Figure 3 BB cross-sectional view; Figure 5 The isometric projection of this utility model Figure 1 ; Figure 6 The isometric projection of this utility model Figure 2 ; In the diagram: 100, operating side locking plate; 110, operating side locking hole; 120, operating side disassembly hole; 130, operating side screw ready hole; 140, operating side positioning pin. 200. Guide block; 210. Drive-side locating pin. 300. Drive-side locking disc; 310. Drive-side locking hole; 320. Drive-side disassembly hole; 330. Drive-side screw standby hole. 400, Positioning Block 500. Connecting screws 600. Tensioning screw, 700, Top screw. Detailed Implementation

[0023] To make the above-mentioned objects, features, and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a full understanding of this utility model. However, this utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this utility model. Therefore, this utility model is not limited to the specific embodiments disclosed below.

[0024] It should be noted that the terms "operating side" and "driving side" are relative to the installation direction of the large swing arm. "Operating side" refers to the side that is convenient for the operator to observe and operate, while "driving side" refers to the opposite side. The terms "inner," "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 utility model and simplifying the description. They 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 utility model.

[0025] like Figure 1-6As shown, one embodiment of this utility model provides a tooling for assembling and disassembling the main shaft of a large swing arm. This tooling is used to install the main shaft into or remove it from the mounting hole of the large swing arm, and a tensioning ring is fitted onto the main shaft. The tooling includes an operating-side locking disc 100, a guide block 200, a drive-side locking disc 300, a connecting screw 500, a tensioning screw 600, and a set screw 700.

[0026] The operating side locking disc 100 is used to abut against the operating side end face of the large swing arm. The operating side locking disc 100 has a disc-shaped structure with a central hole for the main shaft to pass through. The operating side locking disc 100 has an operating side locking hole 110 and an operating side disassembly hole 120. In this embodiment, there are at least two operating side locking holes 110, which are evenly distributed in a circumferential shape to ensure that the tension ring is subjected to uniform force during pushing. There are at least two operating side disassembly holes 120, which are also evenly distributed in a circumferential shape to match the two symmetrical threaded holes usually provided on the inner ring of the tension ring.

[0027] In one embodiment, the operating side locking disc 100 is further provided with an operating side positioning pin 140, which is used to insert into a pin hole at one end of the spindle to achieve circumferential positioning between the operating side locking disc 100 and the spindle.

[0028] In one embodiment, the operating side locking disc 100 is further provided with at least two operating side screw standby holes 130. The operating side screw standby holes 130 are evenly distributed in a circumferential shape and are used to store the tensioning screws 600 when the tooling is not in operation, so as to prevent the screws from being lost.

[0029] In one embodiment, a positioning block 400 is also included, which is operably associated with the operating-side locking disc 100 by bolts. Specifically, the positioning block 400 can be fixed to the outer edge of the operating-side locking disc 100 by bolts to cooperate with the snap ring positioning plate on the large swing arm to position the circumferential angle of the spindle. The operating-side locking disc 100 is also provided with an upward marking, such as the word "TOP," to indicate the installation orientation, so that the operator can identify the installation direction.

[0030] In one embodiment, the guide block 200 is used to be disposed on the drive side of the large swing arm. The guide block 200 is a block structure with a central hole, and a drive-side positioning pin 210 is provided on it. The drive-side positioning pin 210 is used to be inserted into the pin hole at the other end of the spindle to realize circumferential positioning between the guide block 200 and the spindle.

[0031] In one embodiment, the drive-side locking disc 300 is disposed on the side of the guide block 200 opposite to the large swing arm. The drive-side locking disc 300 has a disc-shaped structure with a central hole for the main shaft to pass through, and has drive-side locking holes 310 and drive-side disassembly holes 320. In this embodiment, there are four drive-side locking holes 310, two of which are corresponding to the main shaft and the other two are corresponding to the guide block 200, so as to select different pushing positions as needed. There are at least two drive-side disassembly holes 320, which are evenly distributed in a circumferential shape.

[0032] In one embodiment, the drive-side locking disc 300 is further provided with at least two drive-side screw standby holes 330. The drive-side screw standby holes 330 are evenly distributed in a circumferential shape and are used to cooperate with the operation-side screw standby holes 130 to store the tensioning screws 600 when the tooling is not in operation.

[0033] In one embodiment, one end of the connecting screw 500 is connected to the operating side locking disc 100, and the other end is connected to the guide block 200. Specifically, the guide block 200 has a through hole for the connecting screw 500 to pass through, and the operating side locking disc 100 has a corresponding threaded hole. After the connecting screw 500 passes through the through hole on the guide block 200, it is screwed into the threaded hole on the operating side locking disc 100, thereby connecting the guide block 200 and the operating side locking disc 100 into an integral frame.

[0034] In one embodiment, the tensioning screw 600 is used to engage with the operating-side disassembly hole 120 and the drive-side disassembly hole 320. During spindle assembly, the tensioning screw 600 passes through the drive-side locking hole 310 and is screwed into the threaded hole on the guide block 200, tightening it appropriately to generate axial tension in the drive-side locking disc 300. During spindle disassembly, the tensioning screw 600 passes through either the operating-side disassembly hole 120 or the drive-side disassembly hole 320 to connect with the threaded hole on the inner ring of the tensioning ring.

[0035] In one embodiment, the set screw 700 is used to engage the operating side locking hole 110 and the driving side locking hole 310. In this embodiment, the set screw 700 is preferably a socket head cap screw with a recessed end, whose recessed end structure can provide a stable pushing force and is less likely to damage the surface of the pushed part. The tensioning screw 600 is preferably a socket head cap screw, which facilitates the application of a large tightening torque using a socket head cap wrench.

[0036] It should be noted that the above-mentioned tooling for assembling and disassembling the main shaft of a large swing arm has the following assembly process: First, prepare for use by checking whether any spare parts of the tooling are missing. Pre-assemble the main shaft with the inner and outer rings of a set of tensioning rings, being careful not to tighten the inner and outer rings of the tensioning rings at this time.

[0037] Insert the operating side locating pin 140 of the operating side locking disc 100 into the pin hole at one end of the spindle. Insert the drive side locating pin 210 of the guide block 200 into the pin hole at the other end of the spindle. Then, use the connecting screw 500 to pass through the through hole on the guide block 200 and screw it into the connecting threaded hole on the operating side locking disc 100 to connect the guide block 200 and the operating side locking disc 100. However, do not fully tighten the connecting screw 500 at this time to prevent the tensioning ring from tightening prematurely.

[0038] Insert the assembled spindle assembly into the mounting hole of the swing arm from the operating side. During insertion, ensure that the upward-facing mark (“TOP”) on the operating side locking disc 100 is facing upward, and align the positioning block 400 with the retaining ring positioning plate on the swing arm to ensure accurate circumferential angle of the spindle installation.

[0039] On the swing arm drive side, install the outer and inner rings of the tensioning ring into the swing arm hole in sequence. Rotate the inner tensioning ring so that its two threaded holes are aligned as closely as possible with the corresponding holes on the guide block 200.

[0040] Place the drive-side locking disc 300 onto the spindle, abutting the outer side of the guide block 200. Remove the tension screw 600 from the drive-side screw standby hole 330, pass it through the drive-side locking hole 310, and screw it into the threaded hole of the guide block 200. Tighten it appropriately to generate axial tension on the drive-side locking disc.

[0041] Screw the set screws 700 into the operating side locking hole 110 and the drive side locking hole 310 respectively. Use an Allen wrench to tighten each set screw 700, causing the end of the set screw 700 to push the outer or inner ring of the tension ring, forcing the inner and outer rings to move axially relative to each other and expand radially, thereby locking the spindle in the rocker arm mounting hole. The relative displacement of the inner and outer rings of the tension ring can be observed through the notch on the locking plate to determine whether the locking is in place.

[0042] After tensioning is completed, first unscrew the tensioning screw 600 on one side of the drive-side locking plate 300 in the opposite direction and temporarily screw it into the drive-side screw standby hole 330. Then remove the drive-side locking plate 300. Next, loosen the connecting screw 500 and pull out the guide block 200 and the operating-side locking plate 100 in sequence to complete the spindle assembly.

[0043] Disassembly Procedure: When disassembling the spindle, first remove the rocker arm end cover. Place the operating side locking plate 100 and the drive side locking plate 300 on both sides of the rocker arm. Locate the threaded hole on the inner ring of the tension ring, remove the tension screw 600 from the operating side screw standby hole 130, and screw it into the inner ring threaded hole through the operating side disassembly hole 120; similarly, remove the other tension screw 600 from the drive side screw standby hole 330, and screw it into the other threaded hole of the inner ring through the drive side disassembly hole 320. Use an Allen wrench to gradually tighten the tension screws 600 on both sides. Using the axial pulling force generated by the threaded pair, smoothly pull the inner ring of the tension ring out from the outer ring to release the locking state, and the spindle can then be removed from the rocker arm mounting hole.

[0044] After completing the work, check whether any spare parts of the tooling are damaged, replace any damaged parts in a timely manner, and store all spare parts together for easy access next time.

[0045] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

[0046] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to 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 utility model.

[0047] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0048] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; 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; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0049] In this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0050] It should be noted that when an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. When an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

Claims

1. A tooling for assembling and disassembling a large swing arm spindle, used to install the spindle into or remove it from the mounting hole of the large swing arm, wherein a tensioning ring is sleeved on the spindle, characterized in that: include The operating side locking plate is used to abut against the operating side end face of the large swing arm, and it is provided with an operating side locking hole and an operating side disassembly hole. Guide blocks are used to be installed on the drive side of the large swing arm; A drive-side locking disc is used to be set on the side of the guide block away from the large swing arm, and a drive-side locking hole and a drive-side disassembly hole are provided on it. The connecting screw has one end connected to the operating side locking disc and the other end connected to the guide block; The tensioning screw is used to mate with the operating side disassembly hole and the driving side disassembly hole; The set screw is used to engage with the operating side locking hole and the driving side locking hole.

2. The tooling for assembling and disassembling a large swing arm spindle according to claim 1, characterized in that: The operating side locking plate is provided with an operating side positioning pin, which is used to insert into the pin hole at one end of the spindle.

3. The tooling for assembling and disassembling a large swing arm spindle according to claim 1, characterized in that: The guide block is provided with a drive-side positioning pin, which is used to insert into the pin hole at the other end of the spindle.

4. The tooling for assembling and disassembling a large swing arm spindle according to claim 1, characterized in that: It also includes a positioning block, which is operably associated with the operating side locking disc by bolts, for engaging with the snap ring positioning plate on the large swing arm to position the circumferential angle of the main shaft.

5. The tooling for assembling and disassembling a large swing arm spindle according to claim 1, characterized in that: The operating side locking plate is provided with at least two operating side screw standby holes, and the driving side locking plate is provided with at least two driving side screw standby holes. The operating side screw standby holes and the driving side screw standby holes are used to store the tensioning screw when the tooling is not in operation. The operating side screw standby holes and the driving side screw standby holes are both evenly distributed in a circumferential shape.

6. The tooling for assembling and disassembling a large swing arm spindle according to claim 1, characterized in that: There are four drive-side locking holes. Two of the drive-side locking holes are set to correspond to the main shaft, and the other two drive-side locking holes are set to correspond to the guide block.

7. The tooling for assembling and disassembling a large swing arm spindle according to claim 1, characterized in that: The set screw is a socket head cap screw with a recessed end, and the tensioning screw is a socket head cap screw with a cylindrical head.

8. The tooling for assembling and disassembling a large swing arm spindle according to claim 1, characterized in that: When disassembling the spindle, the tensioning screw passes through the operating side disassembly hole or the drive side disassembly hole to connect with the threaded hole on the inner ring of the tensioning ring.

9. The tooling for assembling and disassembling a large swing arm spindle according to claim 1, characterized in that: There are at least two disassembly holes on both the operating side and the driving side, and both the operating side and driving side disassembly holes are evenly distributed in a circumferential pattern.

10. A tooling for assembling and disassembling a large swing arm spindle according to claim 1, characterized in that: The operating side locking hole has at least two holes, which are evenly distributed in a circumferential shape.

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