Slewing bearing stub bolt extraction device and method

Abstract

The present invention belongs to the technical field of engineering machinery, and in particular relates to a device and method for removing broken head bolts from a slewing bearing. The device comprises a base, on which is provided a bracket that moves back and forth vertically; a lifting assembly, which is arranged on the base and supported on the bottom of the bracket, and which converts rotary motion into lifting motion; a sleeve assembly, which comprises a sleeve and a drill bit, and the drill bit is arranged on the sleeve; and a drive assembly, which is arranged on the bracket and comprises a first output end and a second output end, wherein the first output end is connected to the sleeve assembly and is used to drive the drill bit to rotate, and the second output end is connected to the lifting assembly and is used to drive the lifting assembly to rise and fall. The present invention enables the rapid removal of broken head bolts, greatly shortens equipment downtime, and improves equipment utilization efficiency; has a wide range of applications, is easy to operate, and reduces manual labor intensity.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of engineering machinery, and particularly relates to a swing bearing broken bolt extraction device and method. BACKGROUND

[0002] In recent years, with the rapid development of the engineering machinery field, equipment with a swing bearing has been widely used in various engineering projects. During use, the equipment with a swing bearing often cannot run normally and is damaged due to bolt fracture and other reasons, so the broken bolt needs to be extracted for repair.

[0003] In the prior art, the broken bolt is usually extracted manually or by welding, and then a pair of pliers or a wrench is used to screw it out. However, this method has low working efficiency, safety hazards, and complicated operation. Therefore, there is an urgent need to provide an efficient, safe, and accurate broken bolt extraction device and method. SUMMARY

[0004] In view of the above-mentioned deficiencies of the prior art, the purpose of the present application is to provide a swing bearing broken bolt extraction device and method to solve the technical problems of complicated operation and safety hazards of the broken bolt of the swing bearing in the prior art.

[0005] To achieve the above-mentioned purposes and other related purposes, the technical solutions of the present application are as follows:

[0006] A swing bearing broken bolt extraction device, comprising:

[0007] a base provided with a bracket moving vertically and reciprocally;

[0008] a jacking assembly arranged on the base and supported at the bottom of the bracket, the jacking assembly converting rotary motion into lifting motion;

[0009] a sleeve assembly comprising a sleeve and a drill bit, the drill bit being arranged on the sleeve; and

[0010] a driving assembly arranged on the bracket, comprising a first output end and a second output end, the first output end being connected with the sleeve assembly for driving the drill bit to rotate, and the second output end being connected with the jacking assembly for driving the jacking assembly to lift.

[0011] Optionally, it further comprises a control assembly arranged on the bracket, the control assembly comprising a main controller, a sensor, and an actuator, the main controller being used for integrated control of the driving assembly, the sensor, and the actuator, the sensor being used for detecting the extraction position and speed and transmitting the detection signal to the main controller, and the actuator being used for receiving the control signal of the main controller and controlling the driving assembly.

[0012] Optionally, the base is connected with the support through at least two guide assemblies, the jacking assembly is located between the two guide assemblies, and the guide assembly comprises a guide seat and a telescopic rod slidingly arranged in the guide seat.

[0013] Optionally, the jacking assembly comprises a screw pair, a sliding block and a fixing plate, the fixing plate is arranged on the base, the screw pair is rotationally arranged on the fixing plate, and the sliding block is matched with the screw pair.

[0014] Optionally, the driving assembly comprises a driving motor and a double-output speed reducer, the double-output speed reducer is connected with the driving motor, the double-output speed reducer has the first output end and the second output end, and the first output end and the second output end are located on the upper and lower sides of the double-output speed reducer respectively.

[0015] Optionally, the screw pair is a ball screw pair, the driving motor is a three-phase alternating current motor, and the double-output speed reducer is a worm gear speed reducer.

[0016] Optionally, the inner diameter of the sleeve is matched with the outer diameter of the broken bolt, and the size of the drill bit is matched with the size of the broken bolt.

[0017] Optionally, the sensor comprises a position sensor and a speed sensor.

[0018] Optionally, the main controller is a programmable logic controller with input and output interfaces.

[0019] Based on the same inventive concept, the application also provides a slewing bearing broken bolt extraction method, which adopts the slewing bearing broken bolt extraction device as described above, and the method comprises the following steps:

[0020] The base is installed at a set position of the slewing bearing, and the sleeve assembly is aligned with the broken bolt;

[0021] The driving assembly is started, and the driving assembly simultaneously drives the jacking assembly to perform jacking movement and drives the sleeve assembly to perform rotating movement;

[0022] The drill bit is pressed against the broken bolt, the sleeve is sleeved on the broken bolt, the sleeve assembly continues to perform rotating movement, the jacking assembly continues to perform jacking movement, and the broken bolt is extracted.

[0023] As described above, the slewing bearing broken bolt extraction device and method of the application have the following beneficial effects:

[0024] The broken bolt is quickly taken out along with the movement and rotation of the sleeve by simultaneously driving the jacking assembly to make jacking movement and driving the sleeve assembly to make rotation movement, so that the equipment downtime is greatly shortened and the equipment use efficiency is improved; the jacking assembly is adopted to control stability, so that the safety risk in the operation process of the equipment is reduced; the universal range is wide, and the taking out of most broken bolts can be applied;

[0025] Further, the accurate control of the position and speed of the taking-out device can be realized by adopting the control assembly; the integrated control is realized by adopting the control assembly, the operation is simple, and the labor intensity is reduced. BRIEF DESCRIPTION OF DRAWINGS

[0026] Figure 1 FIG. 1 is a structural schematic diagram of a slewing bearing broken bolt taking-out device according to an embodiment of the present application;

[0027] Figure 2 FIG. 2 is an application schematic diagram of the slewing bearing broken bolt taking-out device according to the embodiment of the present application.

[0028] BRIEF DESCRIPTION OF DRAWINGS

[0029] 10-base; 11-bracket; 20-jacking assembly; 30-sleeve assembly; 31-sleeve; 32-drill bit; 40-driving assembly; 41-driving motor; 42-double output speed reducer; 421-first output end; 422-second output end; 50-guiding assembly; 51-guiding seat; 52-telescopic rod; 60-control assembly;

[0030] 100-slewing bearing broken bolt taking-out device; 200-main equipment; 300-slewing bearing; 400-broken bolt. DETAILED DESCRIPTION

[0031] The embodiments of the present application are described below by specific specific embodiments, and those skilled in the art can easily understand other advantages and effects of the present application from the content disclosed in the specification. The present application can also be implemented or applied by different specific embodiments, and each detail in the specification can be modified or changed based on different views and applications without departing from the spirit of the present application.

[0032] It should be noted that the diagrams provided in the embodiments only illustrate the basic concepts of the present application in a schematic manner, and only the components related to the present application are shown in the diagrams, rather than being drawn according to the number, shape and size of the components in actual implementation. The shape, number and proportion of each component in actual implementation can be arbitrarily changed, and the layout form of the components can be more complex. It should be understood that the structure, proportion, size and the like shown in the diagrams attached to the present specification are only used to cooperate with the content disclosed in the specification, so as to be understood and read by those skilled in the art, and do not define the limited conditions under which the present application can be implemented, and therefore do not have technical substantive significance. Any modification of structure, change of proportional relationship or adjustment of size, without affecting the effects that can be produced by the present application and the purposes that can be achieved, should still fall within the scope of the technical content disclosed by the present application. At the same time, the terms such as "upper", "lower", "left", "right", "middle" and "one" used in the present specification are only for the convenience of clear description, and are not used to limit the scope in which the present application can be implemented. The change or adjustment of the relative relationship, without substantially changing the technical content, is also considered as the scope in which the present application can be implemented.

[0033] In order to describe the present application in detail, the slewing bearing broken bolt extraction device and method of the present application will be described in detail as follows:

[0034] Please refer to Figure 1 and Figure 2 , the present application provides a slewing bearing broken bolt extraction device 100, comprising a base 10, a jacking assembly 20, a sleeve assembly 30 and a driving assembly 40, wherein the base 10 is provided with a bracket 11 moving vertically and reciprocally; the jacking assembly 20 is arranged on the base 10 and supported at the bottom of the bracket 11, and the jacking assembly 20 converts rotary motion into lifting motion; the sleeve assembly 30 comprises a sleeve 31 and a drill bit 32, the drill bit 32 is arranged on the sleeve 31; and the driving assembly 40 is arranged on the bracket 11 and comprises a first output end 421 and a second output end 422, the first output end 421 is connected with the sleeve assembly 30 for driving the drill bit 32 to rotate, and the second output end 422 is connected with the jacking assembly 20 for driving the jacking assembly 20 to lift.

[0035] Specifically, the bracket 11 plays a role of fixing and supporting to ensure the stability of the device during operation. The structure of the bracket 11 can be adjusted according to the size and shape of the slewing bearing to adapt to different types of equipment with slewing bearings. The jacking assembly 20 is used to convert the rotary motion generated by the driving assembly 40 into linear motion. The jacking assembly 20 is made of high-strength material to ensure the stability and durability of the device under high load. The driving assembly 40 has two output ends, namely the first output end 421 and the second output end 422, which can drive simultaneously. Among them, the second output end 422 is used to drive the jacking assembly 20 to convert the rotary motion into linear motion to drive the bracket 11 to jacking, and then drive the sleeve assembly 30 to move. The first output end 421 is used to drive the sleeve assembly 30 to rotate, the sleeve 31 is used to be sleeved on the broken bolt, and the drill bit 32 is used to be tightly pressed on the broken bolt to ensure the reliable connection between the sleeve 31 and the broken bolt. The sleeve 31 and the drill bit 32 are made of wear-resistant materials to ensure the durability during repeated use.

[0036] Specifically, during operation, the driving assembly 40 is started, and the driving assembly 40 simultaneously drives the jacking assembly 20 and the sleeve assembly 30 to move. The jacking assembly 20 converts the rotary motion into linear motion to drive the bracket 11 to jacking motion, and at the same time, the sleeve assembly 30 rotates. Since the sleeve 31 is connected with the broken bolt, the broken bolt is taken out with the movement of the sleeve 31.

[0037] In the above embodiment, the slewing bearing broken bolt taking-out device 100 further comprises a control assembly 60 arranged on the bracket 11. The control assembly 60 comprises a main controller, a sensor and an actuator. The main controller is used for integrated control of the driving assembly 40, the sensor and the actuator. The sensor is used for detecting the taking-out position and speed and transmitting the detection signal to the main controller. The actuator is used for receiving the control signal of the main controller and controlling the driving assembly 40. Specifically, during the taking-out process, the cooperative work of the main controller, the sensor and the actuator ensures the stable position and speed during the taking-out operation. First, the bracket 11 is installed at a suitable position of the slewing bearing and aligned with the broken bolt. Then, the main controller is turned on to control the driving assembly 40 to work to drive the jacking assembly 20 to convert the rotary motion into linear motion, and at the same time, drive the sleeve assembly 30 to rotate until the broken bolt is taken out. During this process, the sensor detects the taking-out position and speed in real time and feeds back the detection signal to the main controller. The main controller controls the actuator according to the detection signal fed back by the sensor. The actuator receives the control signal of the main controller and controls the driving assembly 40 to realize accurate control of the taking-out position and speed. By adopting the control assembly 60, accurate control of the position and speed of the taking-out device can be realized. The integrated control by the control assembly 60 is simple to operate and reduces the labor intensity.

[0038] In some embodiments, the base 10 is connected with the support 11 through at least two guide assemblies 50, and the jacking assembly 20 is located between the two guide assemblies 50. The guide assembly 50 comprises a guide seat 51 and a telescopic rod 52 slidingly arranged in the guide seat 51. In the embodiment, two guide assemblies 50 are arranged on opposite sides of the support 11, and the jacking assembly 20 is located between the two guide assemblies 50. The guide assemblies 50 can facilitate the stability of the support 11 when the support 11 is driven to move up and down by the jacking assembly 20.

[0039] In some embodiments, the jacking assembly 20 comprises a screw pair, a sliding block and a fixed plate. The fixed plate is arranged on the base 10, the screw pair is rotatably arranged on the fixed plate, and the sliding block is matched with the screw pair. In the embodiment, the base 10, the support 11 and the fixed plate are made of steel. The screw pair is arranged on the base 10 through the fixed plate. The screw pair and the sliding block are matched to convert the rotary motion of the driving assembly 40 into linear motion to drive the support 11 to move up and down. In other embodiments, the jacking assembly 20 can also adopt other structural forms as long as it can convert the rotary motion of the driving assembly 40 into the lifting motion of the support 11.

[0040] In some embodiments, the driving assembly 40 comprises a driving motor 41 and a double-output speed reducer 42. The double-output speed reducer 42 is connected with the driving motor 41. The double-output speed reducer 42 has a first output end 421 and a second output end 422. The first output end 421 and the second output end 422 are located on the upper and lower sides of the double-output speed reducer 42, respectively. In the embodiment, the output shaft of the driving motor 41 is connected with the double-output speed reducer 42. The double-output speed reducer 42 is used to reduce the speed of the high-speed rotary motion generated by the driving motor 41 to a speed suitable for the jacking assembly 20. Moreover, the first output end 421 is connected with the sleeve 31 of the sleeve assembly 30, and the second output end 422 is connected with the screw pair of the jacking assembly 20.

[0041] In some embodiments, the screw pair is a ball screw pair, the driving motor 41 is a three-phase alternating current motor, and the double-output speed reducer 42 is a worm gear speed reducer. The screw pair converts the rotational motion transmitted by the driving motor 41 through the double-output speed reducer 42 into linear motion, which is used to drive the bracket 11 to move up and down, thereby driving the sleeve assembly 30 to move up and down. The ball screw pair has high transmission efficiency and precision, and can bear a large axial load. In this embodiment, the diameter of the screw pair is 25 mm, and the lead is 10 mm. The driving motor 41 in this embodiment is a three-phase alternating current motor, and the power of the driving motor 41 is 1.5 kW and the rotating speed is 1500 rpm. The double-output speed reducer 42 is a worm gear speed reducer, and the speed reduction ratio of the speed reducer is 1:50, which can reduce the rotating speed of the driving motor 41 to 30 rpm to adapt to the rotating speed of the screw pair.

[0042] It can be understood that the inner diameter of the sleeve 31 is matched with the outer diameter of the broken bolt, and the size of the drill bit 32 is matched with the size of the broken bolt. Such a structure can ensure that the sleeve 31 can be sleeved on the broken bolt. In this embodiment, the inner diameter of the sleeve 31 is suitable for a broken bolt with a diameter of 5-10 cm, and the sleeve 31 is made of hard alloy or high-speed steel.

[0043] In the above embodiment, the sensor includes a position sensor and a speed sensor. Specifically, the position sensor is used to detect the taking-out position, and the speed sensor is used to detect the taking-out speed. The sensor type can be a photoelectric sensor, a Hall sensor, etc.

[0044] In the above embodiment, the main controller is a programmable logic controller with input and output interfaces.

[0045] Referring to Figure 2 , based on the same inventive concept, the application also provides a slewing bearing broken bolt taking-out method, which adopts the slewing bearing broken bolt taking-out device 100 described above, and the method comprises the following steps:

[0046] The base 10 is installed at a set position of the slewing bearing 300, and the sleeve assembly 30 is aligned with the broken bolt 400;

[0047] The driving assembly 40 is started, which simultaneously drives the jacking assembly 20 to move up and drives the sleeve assembly 30 to rotate;

[0048] The drill bit 32 is tightly pressed against the broken bolt 400, the sleeve 31 is sleeved on the broken bolt 400, the sleeve assembly 30 continues to rotate, and the jacking assembly 20 continues to move up, until the broken bolt 400 is taken out.

[0049] Example 1: The broken bolt 400 at the slewing bearing 300 of a main equipment 200 is taken out. The diameter of the broken bolt 400 is 7cm. The bracket 11 of the slewing bearing broken bolt taking-out device 100 is fixed around the slewing bearing 300 to ensure the stability of the device. The sleeve 31 with an inner diameter of 7cm is selected. The driving motor 41 of the driving assembly 40 is connected with the double-output speed reducer 42, the first output end 421 of the double-output speed reducer 42 is connected with the sleeve assembly 30, and the second output end 422 is connected with the jacking assembly 20.

[0050] The main controller is opened, the driving motor 41 is started, the driving motor 41 drives the jacking assembly 20 to move through the double-output speed reducer 42, the jacking assembly 20 converts the rotary motion into linear motion, the bracket 11 is lifted, and at the same time, the double-output speed reducer 42 drives the sleeve assembly 30 to rotate until the broken bolt 400 is taken out.

[0051] During the taking-out process, the sensor detects the position and speed of the taking-out device in real time, and transmits the detection signal to the main controller. The main controller controls the driving motor 41 and other devices according to the detection signal fed back by the sensor, so as to realize accurate control of the taking-out position and speed. The whole process is simple and safe to operate.

[0052] Example 2: The broken bolt 400 at the slewing bearing 300 of a main equipment 200 is taken out. The diameter of the broken bolt 400 is 5cm. The bracket 11 of the slewing bearing broken bolt taking-out device 100 is fixed around the slewing bearing 300 to ensure the stability of the device. The sleeve 31 with an inner diameter of 5cm is selected, and the installation of the remaining components is operated according to the method of example 1.

[0053] During the whole taking-out process, the main controller, the sensor and the actuator work cooperatively to ensure that the taking-out device maintains stable position and speed during the operation process, and the broken bolt 400 is taken out efficiently, safely and accurately.

[0054] In summary, the slewing bearing broken bolt taking-out device and method provided by the application can drive the jacking assembly 20 to make lifting movement and drive the sleeve assembly 30 to make rotary movement through the driving assembly 40, so that the broken bolt 400 can be quickly taken out along with the movement and rotation of the sleeve 31, which greatly shortens the equipment downtime and improves the equipment utilization efficiency. The jacking assembly 20 is used for stability control, which reduces the safety risk in the operation process of the equipment. The device has wide application range and can be applied to the taking-out of most broken bolts 400. Further, the control assembly 60 is used to realize accurate control of the position and speed of the taking-out device. The control assembly 60 is used for integrated control, which is simple to operate and reduces the labor intensity.

[0055] The above embodiments are only illustrative of the principles of the present application and its efficacy, and are not intended to limit the present application. Any modification or change made by any person skilled in the art without departing from the spirit and scope of the present application shall be covered by the claims of the present application.

Claims

1. A slewing bearing broken head bolt removal device, characterized in that: include: A base, wherein the base is provided with a bracket that moves back and forth vertically; A lifting assembly is provided on the base and supported on the bottom of the bracket, and the lifting assembly converts the rotational motion into the lifting motion; A sleeve assembly, comprising a sleeve and a drill bit, wherein the drill bit is arranged on the sleeve; as well as The driving assembly is arranged on the bracket and includes a first output end and a second output end. The first output end is connected to the sleeve assembly and is used to drive the drill bit to rotate. The second output end is connected to the jacking assembly and is used to drive the jacking assembly to rise and fall.

2. The slewing bearing broken head bolt removal device according to claim 1, characterized in that: It also includes a control component arranged on the bracket, the control component includes a main controller, a sensor and an actuator, the main controller is used to integrate and control the drive component, the sensor and the actuator, the sensor is used to detect the removal position and speed, and transmit the detection signal to the main controller; the actuator is used to receive the control signal of the main controller and control the drive component.

3. The slewing bearing broken head bolt removal device according to claim 1, characterized in that: The base is connected to the bracket through at least two guide assemblies. The lifting assembly is located between the two guide assemblies. The guide assembly includes a guide seat and a telescopic rod slidably arranged in the guide seat.

4. The slewing bearing broken head bolt removal device according to claim 1, characterized in that: The lifting assembly includes a screw pair, a slider and a fixed plate. The fixed plate is arranged on the base. The screw pair is rotatably arranged on the fixed plate. The slider is adapted to the screw pair.

5. The slewing bearing broken head bolt removal device according to claim 4, characterized in that: The drive assembly includes a drive motor and a dual-output reducer, the dual-output reducer is connected to the drive motor, and the dual-output reducer has the first output end and the second output end, and the first output end and the second output end are respectively located on the upper and lower sides of the dual-output reducer.

6. The slewing bearing broken head bolt removal device according to claim 5, characterized in that: The screw pair is a ball screw pair, the drive motor is a three-phase AC motor, and the dual-output reducer is a worm gear reducer.

7. The slewing bearing broken head bolt removal device according to claim 1, characterized in that: The inner diameter of the sleeve is adapted to the outer diameter of the broken head bolt, and the size of the drill bit is adapted to the size of the broken head bolt.

8. The slewing bearing broken head bolt removal device according to claim 2, characterized in that: The sensors include a position sensor and a speed sensor.

9. The slewing bearing broken head bolt removal device according to claim 2, characterized in that: The main controller is a programmable logic controller with input and output interfaces.

10. A method for removing a broken bolt from a slewing bearing, characterized in that: The slewing bearing broken head bolt removal device according to any one of claims 1 to 9 is used, and the method comprises the following steps: Install the base at the set position of the slewing bearing and align the sleeve assembly with the broken bolt; Starting the drive assembly, the drive assembly simultaneously drives the jacking assembly to perform jacking motion and drives the sleeve assembly to perform rotational motion; The drill bit is tightened against the broken head bolt, the sleeve is sleeved on the broken head bolt, the sleeve assembly continues to rotate, and the jacking assembly continues to jack up until the broken head bolt is taken out.

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