Quick mounting tool for bearing

Abstract

A bearing rapid installation tool comprises a rack, a press machine and a workpiece positioning mechanism. The machine frame is composed of a portal frame installed on an operation platform. The workpiece positioning mechanism is divided into a shaft workpiece positioning mechanism and a bearing workpiece positioning mechanism; the shaft workpiece positioning mechanism is an adapter, and the upper end and the lower end of the adapter are of structures detachably connected with the shaft workpiece and the working platform correspondingly. The bearing workpiece positioning mechanism comprises a radial limiting plate, a radial limiting column and an axial guide plate; the radial limiting column is vertically connected to the working platform, and the radial limiting plate is connected to the working platform through the radial limiting column; the axial guide plate is parallel to the working platform, and a bearing placing hole is formed in the middle of the axial guide plate; the radial limiting plates and the radial limiting columns are uniformly distributed around the central axis of the working space; the radial limiting plate is connected below the axial guide plate through the supporting legs; the press is connected to the portal frame from bottom to top. A piston rod of the press is vertically downward. The bottom end of the piston rod is connected with a pressing plate.

Description

Technical Field

[0001] This utility model belongs to the field of conveying equipment manufacturing technology, specifically a bearing quick installation tool. Background Technology

[0002] In the production and after-sales maintenance of equipment such as conveyor belts, the bearings are frequently damaged and replaced because these types of equipment use many support rollers that are constantly in operation.

[0003] Taking common flanged shafts and bearings as examples, both components are standard parts. During equipment manufacturing, they can be assembled using a heat-fitting method. Specifically, the bearing is heated in transformer oil for about half an hour, and then the shaft is pressed into the inner ring. This method reduces the difficulty of manual assembly, requiring only relatively small pressure. However, this method is less efficient during equipment maintenance. The main reasons are: oil baths and electric heating are inconvenient to use at the equipment's operating site, and the heating time is long, making it uneconomical for small-batch assembly during maintenance. Therefore, a vertical method, i.e., manually tapping the shaft into the bearing, is often used at the maintenance site. Obviously, this method results in lower assembly accuracy and quality.

[0004] Therefore, how to quickly and efficiently complete the assembly between bearings and shafts on-site is a technical problem that needs to be solved. Summary of the Invention

[0005] In order to solve the above-mentioned problems in the existing technology, this utility model proposes a bearing quick installation fixture, which is particularly suitable for on-site maintenance of equipment such as conveyor belts, and can also be used in the production and manufacturing of such equipment.

[0006] A bearing quick-installation fixture includes a frame, a press, and a workpiece positioning mechanism;

[0007] The frame is composed of a gantry structure mounted on the work platform; the middle of the work platform is the work space;

[0008] Workpiece positioning mechanisms are divided into shaft workpiece positioning mechanisms and bearing workpiece positioning mechanisms;

[0009] The shaft workpiece positioning mechanism is a connector, with its upper and lower ends being detachably connected to the shaft workpiece and the work platform, respectively; the axis of the connector coincides with the central axis of the workspace.

[0010] The bearing workpiece positioning mechanism includes a radial limiting plate, a radial limiting post, and an axial guide plate. The radial limiting post is vertically connected to the working platform. The radial limiting plate has holes corresponding to the radial limiting post, and the radial limiting post passes through the holes to connect to the working platform. The axial guide plate is parallel to the working platform. A bearing mounting hole is opened in the middle of the axial guide plate (the bearing is placed in this hole, and the outer diameter of the bearing's outer ring is consistent with the inner diameter of the mounting hole). The axis of the bearing mounting hole coincides with the central axis of the working space. There are multiple identical sets of radial limiting plates and radial limiting posts, which are evenly distributed around the central axis of the working space. The radial limiting plate is connected to the axial guide plate below it via support legs.

[0011] The press is connected to the gantry from bottom to top. The piston rod of the press is vertically downward and its axis coincides with the central axis of the working space. A pressure plate is connected to the bottom of the piston rod (the projection area of ​​the pressure plate covers the inner ring of the bearing).

[0012] The operation process of this fixture is as follows: First, install the shaft workpiece positioning mechanism onto the work platform. The surface of the work platform can be pre-drilled with countersunk holes to fix the corresponding adapter. Then, install the shaft workpiece onto the adapter.

[0013] Next, the corresponding axial guide plate is taken and connected to the radial limiting plate. Radial limiting posts are installed through pre-drilled holes on the work platform, and then the radial limiting plate mates with the corresponding radial limiting posts. This achieves stable positioning of the bearing workpiece.

[0014] At this point, the shaft workpiece is below the bearing mounting hole of the shaft guide plate, and the two are coaxial. Place the bearing workpiece into the bearing mounting hole, ensuring the inner ring mates with the shaft workpiece. Then start the press; the press plate presses the inner ring of the bearing downwards until the shaft workpiece and bearing workpiece are installed.

[0015] Furthermore, the bottom surface of the pressure plate is smooth; there are multiple pressure plates in a series, each with a different bottom area; the pressure plate is detachably connected to the piston rod; the bottom area of ​​the pressure plate corresponds to the specifications of the bearing workpiece.

[0016] The bearing workpiece positioning mechanism has multiple units in a series, each with a different bearing mounting hole diameter (the bearing mounting hole diameter corresponds to the outer diameter of the bearing), and the same radial limiting plate and radial limiting post; the bearing workpiece positioning mechanism is detachably connected to the working platform.

[0017] There are multiple shaft workpiece positioning mechanisms in series. Because they are designed to work with shaft workpieces of different specifications, their detachable connection structures for shaft workpieces are different.

[0018] The above structure makes this fixture suitable for the installation of shafts and bearings of various specifications.

[0019] Furthermore, the adapter is divided into flanged shaft adapters and ordinary shaft adapters;

[0020] The upper end of the flanged shaft adapter has multiple mounting holes corresponding to the fixing holes of the flanged shaft; there are multiple flanged shaft adapters in a series, and the diameter of the circle containing their mounting holes and the number of mounting holes are different (the diameter, number of mounting holes and height correspond to the specifications of the flanged shaft).

[0021] The main body of the ordinary shaft adapter has a countersunk hole corresponding to the outer diameter of the ordinary shaft, and the top surface of the countersunk hole is open; there are multiple ordinary shaft adapters in a series, and their countersunk hole diameters are different (the hole diameter corresponds to the specifications of the ordinary shaft in terms of height).

[0022] For the main types of shaft workpieces, use the corresponding adapter to make the top height of the shaft workpiece correspond to the height of the shaft guide plate / bearing mounting hole.

[0023] Furthermore, the legs of the gantry frame are detachably connected to the working platform; the body of the press is detachably connected to the gantry frame.

[0024] The above-mentioned detachable assembly structure is adopted, and it is also considered that this tooling needs to be located at the site of the equipment to be repaired, so it needs to be easy to disassemble and transport. After trial assembly, this tooling can be transported by a small truck (pickup truck), and maintenance personnel can also go there in the vehicle, which is particularly convenient.

[0025] Furthermore, the top of the press body is shaped like a quadrangular prism, and a press base is connected to the gantry. The press base has a downward-facing concave hole, the shape of which corresponds to the shape of the top of the press body. The top of the press body is inserted into the concave hole and connected by a radial pin / pin hole structure.

[0026] The bottom of the piston rod is shaped like a quadrangular prism. The top surface of the pressure plate is detachably connected to a pressure plate seat. The pressure plate seat has an upward-facing concave hole. The shape of the cavity of the concave hole corresponds to the shape of the bottom of the piston rod. The bottom of the piston rod is inserted into the concave hole and connected by a radial pin / pin hole structure.

[0027] The above structure also takes into account ease of assembly and disassembly while ensuring good performance.

[0028] Furthermore, the press is a hydraulic cylinder or a pneumatic cylinder (generally, a hydraulic press is more suitable), and the hydraulic station or pneumatic station is connected to the hydraulic cylinder or pneumatic cylinder via a pipeline.

[0029] Furthermore, the outriggers are inclined, and the diameter of the circle containing the lower end of each outrigger is larger than the diameter of the circle containing the upper end of each outrigger. This structural design primarily considers the characteristics of the forces during the limiting process: the tendency of the bearing workpiece to deviate from the axis causes the radial limiting portion to have a tendency to move radially. After the outriggers are inclined, the radial limiting portion can apply tensile or pushing forces to the axial guide plate in the radial direction. In contrast, vertical outriggers only have vertical supporting forces and lack radial forces.

[0030] Preferably, there are three sets of radial limiting plates and radial limiting posts. This structure is the simplest in terms of providing functionality / performance, and it facilitates the disassembly, assembly, and transportation of tooling.

[0031] This fixture effectively ensures uniform pressure from the press when installing shaft and bearing workpieces, preventing bearing deformation or damage. Furthermore, it is suitable for installing workpieces of various sizes, facilitates transportation and disassembly, and improves production and maintenance efficiency. Attached Figure Description

[0032] Figure 1 This is a schematic diagram of the usage state structure of this embodiment (with bearings installed);

[0033] Figure 2 This is a top view of the working platform (where the round holes are countersunk holes or countersunk screw holes).

[0034] Figure 3 This is a top view schematic diagram of the structure with the flange shaft adapter;

[0035] Figure 4 This is a top view schematic diagram of the bearing workpiece positioning mechanism;

[0036] Figure 5 This is a schematic diagram of the longitudinal cross-section of the bearing workpiece positioning mechanism;

[0037] Figure 6 This is a schematic diagram of the radial cross-sectional structure of the press base (from an upward angle).

[0038] Figure 7 This is a schematic diagram of the radial cross-section structure of the pressure plate seat (top view).

[0039] Figure 8 This is a schematic diagram of the tooling used to remove bearing workpieces.

[0040] In the diagram, the components are: 1. Press; 2. Working platform; 3. Gantry frame; 4. Shaft workpiece; 5. Bearing workpiece; 6. Radial limiting plate; 7. Radial limiting column; 8. Shaft guide plate; 9. Bearing mounting hole; 10. Support leg; 11. Pressure plate; 12. Shaft adapter with flange; 13. Press base; 14. Pin hole; 15. Pressure plate seat; 16. Hydraulic station; 17. Pipe; 18. Door frame; 19. Top column; 20. Ear plate; 21. Reinforcing rib plate; 22. Step structure; 23. Concave hole. Detailed Implementation

[0041] The present invention will be further explained below with reference to the accompanying drawings and specific embodiments.

[0042] refer to Figure 1 and Figure 2 A bearing quick-installation fixture includes a frame, a press 1, and a workpiece positioning mechanism.

[0043] The frame is composed of a gantry 3 installed on the work platform 2; the middle position of the work platform is the work space.

[0044] The press 1 is connected to the gantry 3 from bottom to top. The piston rod of the press is vertically downward and the axis of the piston rod coincides with the central axis of the working space. A pressure plate 11 is connected to the bottom end of the piston rod.

[0045] In this example, the legs of the gantry are detachably connected to the work platform; the body of the press is detachably connected to the gantry. For example... Figure 2 The work platform is pre-drilled with countersunk holes for connecting the gantry frame, and the legs of the gantry frame are connected to the work platform by bolts.

[0046] The workpiece positioning mechanism is divided into a shaft workpiece positioning mechanism and a bearing workpiece positioning mechanism.

[0047] The shaft workpiece positioning mechanism is an adapter, with its upper and lower ends being detachably connected to the shaft workpiece and the work platform, respectively. The axis of the adapter coincides with the central axis of the workspace. Adapters are divided into flanged shaft adapters and ordinary shaft adapters; this example uses a flanged shaft adapter 12.

[0048] like Figure 3 The upper end of the flanged shaft adapter 12 has multiple (six in this example) mounting holes corresponding to the fixing holes of the flanged shaft. The lower end of the flanged shaft adapter has multiple lugs 20 (three in this example). The work platform is pre-set with countersunk holes or countersunk threaded holes for connecting the adapter. The lugs have through holes corresponding to the countersunk holes or countersunk threaded holes. A pin is inserted into the countersunk hole through the through hole, or a bolt is inserted into the countersunk threaded hole through the through hole.

[0049] There are multiple series of flanged shaft adapters, which differ in the diameter of the circle containing the mounting holes and the number of mounting holes.

[0050] The main body of a standard shaft adapter has a countersunk hole corresponding to the outer diameter of a standard shaft. The top surface of the countersunk hole is open, and the standard shaft is inserted into the countersunk hole. Standard shaft adapters are available in series, with different diameters for their countersunk holes. This type of adapter is quite common.

[0051] like Figure 4 and Figure 5 The bearing workpiece positioning mechanism includes a radial limiting plate 6, a radial limiting post 7, and an axial guide plate 8. The radial limiting post 7 is vertically connected to the working platform 2. The radial limiting plate 6 has holes corresponding to the radial limiting post 7, and the radial limiting post passes through the holes to connect to the working platform. The axial guide plate 8 is parallel to the working platform. A bearing mounting hole 9 is opened in the middle of the axial guide plate, and the axis of the bearing mounting hole coincides with the central axis of the working space. There are multiple sets of the same radial limiting plate and radial limiting post (3 sets in this example), which are evenly distributed around the central axis of the working space. The radial limiting plate 6 is connected to the axial guide plate 8 through a support leg 10.

[0052] In this example, the legs are tilted, and the diameter of the circle containing the lower ends of each leg is larger than the diameter of the circle containing the upper ends of each leg. (Reference) Figure 2 The work platform 2 has a countersunk hole for inserting the radial limiting post 7. After the hole on the radial limiting plate is aligned with the countersunk hole, the radial limiting post (a pin can be used) is inserted.

[0053] Further reference Figure 6 The top of the press 1 body is in the shape of a quadrangular prism. A press base 13 is connected to the gantry. The press base has a downward-facing concave hole 23. The shape of the cavity of the concave hole corresponds to the shape of the top of the body (the hole is in the shape of a quadrangular prism). The top of the body is inserted into the concave hole and connected through a radial pin / pin hole structure (pin hole marked 14 in the figure).

[0054] Further references are as follows Figure 7 The bottom of the piston rod is in the shape of a quadrangular prism. The top surface of the pressure plate 11 is detachably connected (e.g., by bolts) to a pressure plate seat 15. The pressure plate seat has an upward-facing concave hole 23. The shape of the cavity of the concave hole corresponds to the shape of the bottom of the piston rod. The bottom of the piston rod is inserted into the concave hole and connected by a radial pin / pin hole structure (the pin hole marked 14 in the figure).

[0055] The bottom surface of pressure plate 11 is smooth; there are multiple pressure plates in a series, each with a different bottom area; the pressure plate is detachably connected to the piston rod via a pressure plate seat; the bottom area of ​​the pressure plate corresponds to the specifications of the bearing workpiece. There are multiple bearing workpiece positioning mechanisms in a series, each with different bearing mounting hole diameters, but identical radial limiting plates and radial limiting posts. The bearing workpiece positioning mechanism is detachably connected to the working platform. There are multiple shaft workpiece positioning mechanisms in a series, and because they accommodate shaft workpieces of different specifications, their detachable connection structures differ.

[0056] In this example, stiffening plates 21 are used to further reinforce the vertically connected parts as much as possible. In particular, between the support leg 10 and the axial guide plate 8, the top surface of the support leg has a stepped structure, and the edge of the axial guide plate is within the stepped structure 22, further improving the radial load-bearing capacity. To improve the overall structural strength and ease of use, the gantry frame is made of structural steel.

[0057] The press is a hydraulic cylinder or a pneumatic cylinder, and the hydraulic station 16 or pneumatic station is connected to the hydraulic cylinder or pneumatic cylinder via a pipe 17. This example uses a hydraulic cylinder + hydraulic station configuration.

[0058] This mounting fixture can also be used to remove bearings, see reference. Figure 8 The structure at this point is as follows: two parallel portal frames 18 are detachably installed in countersunk holes or countersunk screw holes on the surface of the work platform. The top edges of the two portal frames are supported below the bottom surface of the inner ring of the bearing workpiece 5. The shaft workpiece 4 is suspended between the two portal frames, and a buffer pad is laid under the shaft workpiece. The pressure plate seat 15 is detachably connected to a downward-facing top column 19, the outer diameter of which is smaller than the inner diameter of the bearing inner ring. The press is started, and the shaft workpiece is pressed out downward by the top column.

[0059] The work platform has pre-drilled countersunk holes for connecting the frame, and the two legs of the frame are directly inserted into the countersunk holes (the bottom of the two legs has downward-facing pins). Alternatively, the two legs of the frame can have through holes, through which pins are inserted into the countersunk holes, or bolts are screwed into the countersunk holes.

Claims

1. A quick-installation fixture for bearings, characterized in that: Includes the frame, press, and workpiece positioning mechanism; The frame is composed of a gantry structure mounted on the work platform; the middle of the work platform is the work space; Workpiece positioning mechanisms are divided into shaft workpiece positioning mechanisms and bearing workpiece positioning mechanisms; The shaft workpiece positioning mechanism is a connector, with its upper and lower ends being detachably connected to the shaft workpiece and the work platform, respectively; the axis of the connector coincides with the central axis of the workspace. The bearing workpiece positioning mechanism includes a radial limiting plate, a radial limiting post, and an axial guide plate. The radial limiting post is vertically connected to the working platform. The radial limiting plate has holes corresponding to the radial limiting post, and the radial limiting post passes through the holes to connect to the working platform. The axial guide plate is parallel to the working platform. A bearing mounting hole is opened in the middle of the axial guide plate, and the axis of the bearing mounting hole coincides with the central axis of the working space. There are multiple identical sets of radial limiting plates and radial limiting posts, which are evenly distributed around the central axis of the working space. The radial limiting plate is connected to the axial guide plate below it via support legs. The press is connected to the gantry from bottom to top. The piston rod of the press is vertically downward and its axis coincides with the central axis of the working space. A pressure plate is connected to the bottom end of the piston rod.

2. The bearing quick-installation fixture according to claim 1, characterized in that: The bottom surface of the pressure plate is smooth; there are multiple pressure plates in a series, each with a different bottom area; the pressure plate is detachably connected to the piston rod. The bearing workpiece positioning mechanism has multiple components in a series, each with a different bearing mounting hole area, but identical radial limiting plates and radial limiting posts; the bearing workpiece positioning mechanism is detachably connected to the work platform. There are multiple shaft workpiece positioning mechanisms in a series, and their detachable shaft workpiece connection structures are different.

3. The bearing quick-installation fixture according to claim 1, characterized in that: The adapter is divided into flanged shaft adapters and ordinary shaft adapters; The upper end of the flanged shaft adapter has multiple mounting holes corresponding to the fixing holes of the flanged shaft; there are multiple flanged shaft adapters in a series, and the diameter of the circle containing their mounting holes and the number of mounting holes are different. The main body of a standard shaft adapter has a countersunk hole corresponding to the outer diameter of a standard shaft, and the top surface of the countersunk hole is open. There are multiple standard shaft adapters in a series, and the diameters of their countersunk holes are different.

4. The bearing quick-installation fixture according to claim 1, characterized in that: The legs of the gantry frame are detachably connected to the working platform; the body of the press is detachably connected to the gantry frame.

5. The bearing quick-installation fixture according to claim 1, characterized in that: The top of the press body is shaped like a quadrangular prism. A press base is connected to the gantry frame. The press base has a downward-facing concave hole. The shape of the cavity of the concave hole corresponds to the shape of the top of the press body. The top of the press body is inserted into the concave hole and connected by a radial pin / pin hole structure. The bottom of the piston rod is shaped like a quadrangular prism. The top surface of the pressure plate is detachably connected to a pressure plate seat. The pressure plate seat has an upward-facing concave hole. The shape of the cavity of the concave hole corresponds to the shape of the bottom of the piston rod. The bottom of the piston rod is inserted into the concave hole and connected by a radial pin / pin hole structure.

6. The bearing quick-installation fixture according to claim 1, characterized in that: The press is a hydraulic cylinder or a pneumatic cylinder, and the hydraulic station or pneumatic station is connected to the hydraulic cylinder or pneumatic cylinder through a pipeline.

7. The bearing quick-installation fixture according to claim 1, characterized in that: The outriggers are inclined, and the diameter of the circle containing the lower end of each outrigger is larger than the diameter of the circle containing the upper end of each outrigger.

8. The bearing quick-installation fixture according to claim 1, characterized in that: There are three sets of radial limiting plates and radial limiting posts.

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