A safety coupling for easy installation

Abstract

The utility model discloses a kind of safety couplings of convenient installation, it is related to coupling technical field, the coupler includes shaft sleeve, connecting flange, outer tooth shaft sleeve, mandrel, safety assembly.The utility model changes the cooperation mode of the outer circle of pin sleeve and the inner hole of safety assembly from interference fit to gap fit, while pin sleeve is designed as outer circle stepped structure to realize axial positioning, is fixed after being loaded by the thread hole and the locking screw of circumferential uniform distribution.This design not only solves the problem of traditional interference fit disassembly difficulty, but also can ensure that pin sleeve will not be separated from safety assembly after safety pin is cut, and convenience and safety are considered;By setting up mounting hole corresponding and matching with mandrel screw hole on connecting flange, when the connecting flange retreat distance is insufficient due to limited space, the dismounting operation of mandrel and shaft sleeve connecting screw can be completed by passing through the mounting hole with internal hexagonal spanner, solve the screw dismounting problem of traditional structure in limited space scene.

Description

Technical Field

[0001] This utility model relates to the field of coupling technology, specifically a safe coupling that is easy to install. Background Technology

[0002] In cold rolling and seamless steel pipe production lines, the main drive coupling between the motor and the reducer generally needs to have a safety shearing function. This allows the safety coupling to promptly shear off the safety pin and interrupt torque transmission in case of overload or other unforeseen events during rolling, effectively protecting the motor, rolls, and related equipment. Safety couplings are widely used in similar operating conditions in cold rolling and seamless steel pipe production lines, such as main rolling mills and leveling mills.

[0003] Existing safety couplings have the following drawbacks: 1. To ensure that the safety pin sleeve and safety component do not separate after the safety pin is sheared, the inner holes of the safety pin sleeve and safety component are interference fit, which makes disassembly and assembly inconvenient.

[0004] 2. The bushing and the left end of the connecting flange are connected by a safety pin. After the mandrel is inserted into the connecting flange, it is connected to the bushing by bolts. After the bushing and the external gear bushing are installed on the equipment at both ends, if the positions of the equipment at both ends are fixed and cannot be moved, due to space limitations, the connecting flange cannot be moved back enough, which will cause the connecting screws of the mandrel and the bushing to be unable to be disassembled or installed.

[0005] Based on this, a safety coupling that is easy to install is now provided, which can eliminate the drawbacks of existing devices. Utility Model Content

[0006] The purpose of this invention is to provide a safe coupling that is easy to install, so as to solve the problems in the background art.

[0007] To achieve the above objectives, this utility model provides the following technical solution: A convenient safety coupling includes a bushing, a connecting flange, an external gear bushing, a mandrel, and a safety component. The mandrel is mounted on the bushing by screws. The bushing and the external gear bushing are connected by the connecting flange. One side of the connecting flange is connected to the bushing by the safety component, and the other side is connected to the external gear bushing by bolts.

[0008] Based on the above technical solutions, this utility model also provides the following optional technical solutions: In one alternative: the safety component includes a safety pin and a pin sleeve, the connecting flange has mounting holes corresponding to the screws, and the connecting flange and the bushing are connected by the safety pin and the pin sleeve.

[0009] In one alternative: the safety component includes a safety pin, a pin sleeve, a connecting disc, and two screws; the connecting flange is fitted with the connecting disc via the two screws; and the connecting disc and the bushing are connected by the safety pin and the pin sleeve.

[0010] In one alternative embodiment: the safety component includes a safety pin, a pin sleeve, a connecting disc, three screws, and a baffle. A baffle groove is provided on the periphery of the connecting flange, and a baffle is disposed in the baffle groove. The connecting disc is mounted on the baffle by three screws. The connecting disc and the bushing are connected by the safety pin and the pin sleeve. An internal spline is provided on the inner ring of the connecting disc, and an external spline is provided on the periphery of the connecting flange. The internal spline and the external spline are connected by a mating connection.

[0011] In one alternative: the internal spline is an involute spline.

[0012] In one alternative: the internal spline is a rectangular spline.

[0013] In one alternative: the distance D1 between the two opposing screw planes is greater than the diameter D2 of the mating surfaces of the connecting disc and the connecting flange.

[0014] In one alternative: the plane spacing D1 between two opposing screws is greater than the major diameter D5 of the internal spline, and the minor diameter D3 of the internal spline is greater than the diameter D4 of the connecting flange plane.

[0015] Compared with the prior art, the beneficial effects of this utility model are as follows: This invention changes the fit between the outer circle of the pin sleeve and the inner hole of the safety component from an interference fit to a clearance fit. Furthermore, the pin sleeve is designed with a stepped outer circle structure for axial positioning. After installation, it is secured to the safety component via circumferentially distributed threaded holes and set screws. This design solves the problem of difficult disassembly and assembly with traditional interference fits, while ensuring that the pin sleeve will not detach from the safety component after the safety pin is sheared, thus balancing convenience and safety.

[0016] This invention solves the problem of screw disassembly and assembly in space-constrained scenarios by opening mounting holes on the connecting flange that correspond to the mandrel screw holes. When the positions of the equipment at both ends are fixed and the space is limited, resulting in insufficient retraction distance of the connecting flange, the mandrel and bushing connecting screws can be disassembled and assembled by passing an Allen wrench through the mounting hole.

[0017] This utility model adopts a split design by adding a connecting plate, which is connected to both the bushing and the connecting flange. On the one hand, the outer diameter of the blank is machined with a maximum outer diameter as the reference, which improves the utilization rate of the blank material and reduces the production cost; on the other hand, when the safety component is damaged, only the connecting plate needs to be replaced, without disassembling the entire connecting flange, which significantly reduces the maintenance workload and parts replacement costs. Attached Figure Description

[0018] Figure 1 This is a first structural schematic diagram of the present invention.

[0019] Figure 2 This is a schematic diagram of the second structure of the present invention.

[0020] Figure 3 This is a schematic diagram of the third structure of this utility model.

[0021] Figure label annotations: 1. Bushing, 2. Safety pin, 3. Connecting flange, 4. External gear bushing, 5. Pin sleeve, 6. Mandrel, 7. Mounting hole, 8. Screw one, 9. Safety component, 10. Connecting plate, 11. Screw two, 12. Screw three, 13. Baffle, 14. Internal spline. Detailed Implementation

[0022] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments.

[0023] In one embodiment, such as Figures 1-3 As shown, a safety coupling that is easy to install includes a bushing 1, a connecting flange 3, an external gear bushing 4, a spindle 6, and a safety component 9. The spindle 6 is installed on the bushing 1 by screws 8. The bushing 1 and the external gear bushing 4 are connected by the connecting flange 3. One side of the connecting flange 3 is connected to the bushing 1 by the safety component 9, and the other side is connected to the external gear bushing 4 by bolts.

[0024] In one embodiment, the safety component 9 includes a safety pin 2 and a pin sleeve 5. The connecting flange 3 has a mounting hole 7 corresponding to the screw 8. The connecting flange 3 and the bushing 1 are connected by the safety pin 2 and the pin sleeve 5.

[0025] The outer circle of the pin sleeve 5 and the inner hole of the safety component 9 are set to clearance fit. The pin sleeve 5 is cylindrical and the outer circle of the pin sleeve 5 is stepped, so that the pin sleeve 5 can be axially positioned. After the pin sleeve 5 is installed into the safety component 9, four threaded holes are machined around the periphery and evenly distributed. Then, the pin sleeve 5 is installed into the safety component 9 with a set screw. This not only facilitates the installation and removal of the pin sleeve 5, but also prevents the pin sleeve 5 from coming off the safety component 9 after the safety pin 2 is sheared.

[0026] Through mounting hole 7, screw 8 can be unscrewed and removed even in situations where space is limited, by inserting an Allen wrench through mounting hole 7.

[0027] In one embodiment, the safety component 9 includes a safety pin 2, a pin sleeve 5, a connecting plate 10, and a second screw 11. The connecting flange 3 is mounted with the connecting plate 10 by the second screw 11. The connecting plate 10 and the bushing 1 are connected by the safety pin 2 and the pin sleeve 5.

[0028] By adding 10 to connect with 1 and 3 respectively, a split design is adopted. Since the outer circle of the blank is based on the maximum outer diameter, the utilization rate of the blank can be improved. Furthermore, with the split design, when the safety component is damaged, 10 can be replaced directly without having to remove the entire 3 for replacement.

[0029] In one embodiment, the safety component 9 includes a safety pin 2, a pin sleeve 5, a connecting plate 10, a screw 12, and a baffle 13. A baffle groove is provided on the periphery of the connecting flange 3, and a baffle 13 is disposed in the baffle groove. The connecting plate 10 is mounted on the baffle 13 by the screw 12. The connecting plate 10 and the bushing 1 are connected by the safety pin 2 and the pin sleeve 5. An inner spline 14 is provided on the inner ring of the connecting plate 10, and an outer spline is provided on the periphery of the connecting flange 3. The inner spline 14 is connected to the outer spline.

[0030] Compared to using screws to transmit torque, using splines to transmit torque provides higher strength.

[0031] In one embodiment, the internal spline 14 is an involute spline.

[0032] In one embodiment, the internal spline 14 is a rectangular spline.

[0033] In one embodiment, the distance D1 between the two opposing screw planes is greater than the diameter D2 of the mating surface of the connecting disc 10 and the connecting flange 3.

[0034] In one embodiment, the plane spacing D1 between the two opposing screws 18 is greater than the major diameter D5 of the internal spline 14, and the minor diameter D3 of the internal spline 14 is greater than the plane diameter D4 of the connecting flange 3.

[0035] The above embodiments disclose a safety coupling that is easy to install, and its specific working principle and process are as follows: The outer circle of the pin sleeve 5 and the inner hole of the safety component 9 are set to clearance fit. The pin sleeve 5 is cylindrical and the outer circle of the pin sleeve 5 is stepped, so that the pin sleeve 5 can be axially positioned. After the pin sleeve 5 is installed into the safety component 9, four threaded holes are machined around the circumference and evenly distributed. Then, the pin sleeve 5 is installed into the safety component 9 with a set screw. This not only facilitates the installation and removal of the pin sleeve 5, but also prevents the pin sleeve 5 from coming off the safety component 9 after the safety pin 2 is sheared. Several mounting holes 7 are provided on the left flange face of the connecting flange 3. The distribution circle diameter and number of mounting holes 7 are consistent with the screw holes of the mandrel 6, and the size of the mounting holes 7 is consistent with the countersunk diameter of the screw holes of the mandrel 6. When assembling the safety component 9, an Allen wrench is inserted into the mounting holes 7 to connect the mandrel 6 to the bushing 1.

[0036] Through mounting hole 7, screw 8 can be unscrewed and removed even in situations where space is limited, by inserting an Allen wrench through mounting hole 7.

[0037] The connecting plate 10 and the bushing 1 are connected by the safety pin 2. The inner hole of the connecting plate 10 and the outer circle of the connecting flange 3 are fitted with a clearance and connected by the screw 11 and the washer. The width H of the connecting plate is greater than the length of the short side of the internal hex wrench.

[0038] The connecting plate 10 and the connecting flange 3 are connected by an involute spline or a rectangular spline. A split baffle 13 is also provided to axially position the connecting plate 10. The baffle 13 and the connecting plate 10 are connected by screws 12.

[0039] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A safety coupling that is easy to install, characterized in that, It includes a bushing (1), a connecting flange (3), an external gear bushing (4), a mandrel (6), and a safety component (9). The bushing (1) is fitted with the mandrel (6) by a screw (8). The bushing (1) and the external gear bushing (4) are connected by the connecting flange (3). One side of the connecting flange (3) is connected to the bushing (1) by the safety component (9), and the other side is connected to the external gear bushing (4) by bolts.

2. The easy-to-install safety coupling according to claim 1, characterized in that, The safety component (9) includes a safety pin (2) and a pin sleeve (5). The connecting flange (3) has a mounting hole (7) corresponding to the screw (8). The connecting flange (3) and the bushing (1) are connected by the safety pin (2) and the pin sleeve (5).

3. The easy-to-install safety coupling according to claim 1, characterized in that, The safety component (9) includes a safety pin (2), a pin sleeve (5), a connecting plate (10), and a second screw (11). The connecting flange (3) is fitted with the connecting plate (10) by the second screw (11). The connecting plate (10) and the bushing (1) are connected by the safety pin (2) and the pin sleeve (5).

4. A conveniently installed safety coupling according to claim 1, characterized in that, The safety component (9) includes a safety pin (2), a pin sleeve (5), a connecting plate (10), a screw three (12), and a baffle (13). A baffle groove is provided on the periphery of the connecting flange (3), and a baffle (13) is provided in the baffle groove. The connecting plate (10) is installed on the baffle (13) by the screw three (12). The connecting plate (10) and the bushing (1) are connected by the safety pin (2) and the pin sleeve (5). An inner spline (14) is provided on the inner ring of the connecting plate (10), and an outer spline is provided on the periphery of the connecting flange (3). The inner spline (14) is connected to the outer spline.

5. A conveniently installed safety coupling according to claim 4, characterized in that, The internal spline (14) is an involute spline.

6. A conveniently installed safety coupling according to claim 4, characterized in that, The internal spline (14) is a rectangular spline.

7. A conveniently installed safety coupling according to claim 3, characterized in that, The plane spacing D1 of the two opposing screws (8) is greater than the mating surface diameter D2 of the connecting disc (10) and the connecting flange (3).

8. A conveniently installed safety coupling according to claim 4, characterized in that, The plane spacing D1 of the two opposing screws (8) is greater than the major diameter D5 of the inner spline (14), and the minor diameter D3 of the inner spline (14) is greater than the plane diameter D4 of the connecting flange (3).

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