Nut rotating device

Abstract

The present invention provides a nut rotating device, which belongs to the technical field of mechanical disassembly and assembly, and comprises a shell, a power supply, a motor, a bearing fixing block, a transmission mechanism, a driving gear, a driven gear, a nut sleeve, and a fixing mechanism. The power supply is located at the bottom of the shell, the motor is located at the top of the power supply, a plurality of bearing fixing blocks are fixed inside the shell, the transmission mechanism is penetrated on the bearing fixing block, the driving gear is sleeved on the transmission mechanism, the nut sleeve is an open type, the driven gear is sleeved outside the nut sleeve, the driven gear is meshed with the driving gear, and the fixing mechanism is installed on the side of the shell; the nut sleeve adopts an open type design, when the nut on the threaded rod needs to be rotated, there is no need to remove the objects connected at both ends of the threaded rod, and the operation is convenient. In addition, in actual operation, nut sleeves of different specifications can be selected according to the nut, and the application range is wide. The nut rotating device of the present invention adopts electric rotation drive, which is convenient for rotating nuts with large pre-tightening force, and the working efficiency is high.

Description

Technical Field

[0001] The invention relates to the technical field of mechanical disassembly and assembly, and in particular to a nut rotating device. Background Art

[0002] Threaded rods are mainly used in industrial plants. Generally, one end is fixed to an I-beam and the other end is fixed to a pipe, I-beam or other equipment. The nut on the threaded rod serves to connect the threaded rod, fix the threaded rod, and adjust the length of the threaded rod. When the position of the pipe, I-beam, or equipment is displaced and the length of the threaded rod needs to be adjusted or the threaded rod needs to be removed, the nut needs to be rotated. When the threaded rod is long or the connection at both ends of the threaded rod cannot be removed and the nut needs to be rotated, the conventional closed-end nut rotating tool cannot hold the nut from both ends for rotation.

[0003] In the prior art, the Chinese invention patent application "Nut Removal Tool" with publication number CN104589041A discloses a nut removal tool, including a frame and a clamping mechanism, the clamping mechanism can be pivotally arranged on the frame, one end of the clamping mechanism has a clamping space for accommodating a nut, a driving mechanism is arranged on the frame, the driving mechanism includes a first driving part, the first driving part drives the clamping mechanism to rotate around the center line of the clamping mechanism, when in use, the nut should first be located in the clamping space of the clamping mechanism, and then the clamping mechanism is driven to rotate by the first driving part, thereby driving the nut to rotate, so that the nut is de-threaded. The invention has a simple structure. If it is used to remove the nut on the threaded rod, the objects at both ends of the threaded rod must be removed first, and then the worker carries the tool and clamps the tool on the nut, which is very inconvenient to use. For nuts with large preload force, if the tool clamping mechanism does not fit tightly with the nut, it is difficult to rotate and remove the nut. In addition, when the threaded rod is located at a higher position or in a narrow space, the worker performs on-site operation, which is less safe. Summary of the invention

[0004] The technical problem to be solved by the present invention is how to realize rotating the nut on the threaded rod without removing the objects connected at both ends of the threaded rod.

[0005] The present invention solves the above technical problems through the following technical solutions:

[0006] A nut rotating device comprises a housing, a power source, a motor, a bearing fixing block, a transmission mechanism, a driving gear, a driven gear, a nut sleeve, and a fixing mechanism;

[0007] The power source is located at the bottom of the housing, the motor is located at the top of the power source, a plurality of bearing fixing blocks are fixed inside the housing, the transmission mechanism is penetrated on the bearing fixing blocks, the driving gear is sleeved on the transmission mechanism, and the transmission mechanism includes: a lower transmission shaft, an upper transmission shaft, a lower boss, an upper boss, a sliding groove, and a spring;

[0008] The lower transmission shaft is passed through the bearing fixing block, one end of the lower transmission shaft is fixedly connected to the motor, the other end of the lower transmission shaft is provided with a boss, the side of the boss is provided with a protrusion, the lower boss is provided with a cavity, the inner wall of the cavity is provided with the sliding groove, the protrusion cooperates with the sliding groove, the spring is located in the cavity of the lower boss, the two ends of the upper transmission shaft are respectively sleeved on the two bearing fixing blocks, the driving gear is sleeved on the upper transmission shaft and is located between the two bearing fixing blocks, and one end of the upper transmission shaft close to the lower transmission shaft is fixedly connected to the upper boss;

[0009] The driven gear and the nut sleeve are both open-type, the driven gear is sleeved outside the nut sleeve, the driven gear is meshed with the driving gear, and the fixing mechanism is installed on the side of the shell.

[0010] In the present invention, both the driven gear and the nut sleeve adopt an open design. When it is not allowed to remove the connectors at both ends of the threaded rod but the nut on the threaded rod needs to be rotated, a nut sleeve matching the nut is selected, and the nut sleeve is directly clamped on the outside of the nut, and the driven gear is clamped on the outside of the nut sleeve. The driving gear is driven by the transmission mechanism, and then the driven gear is driven to rotate, so that the nut can be rotated, and the operation is convenient. When the threaded rod is located at a higher position or the space is narrow, workers do not need to operate on site, which can greatly ensure the personal safety of workers. In addition, in actual operations, nut sleeves of different specifications can be selected according to the nuts, and the application range is wide. The nut rotating device of the present invention adopts electric rotation drive, which is convenient for rotating nuts with large pre-tightening force and has high work efficiency.

[0011] The nut rotating device of the present invention is not only suitable for nuts with smaller pre-tightening force, but also suitable for nuts with larger pre-tightening force. When the nut with smaller pre-tightening force is rotated, the lower boss is lifted up and matched with the upper boss, driving the upper transmission shaft and the active gear to rotate, thereby driving the driven gear to rotate and rotate the nut; when the nut with larger pre-tightening force is rotated, the motor drives the lower boss to rotate normally, and the upper boss does not rotate due to the larger pre-tightening force of the nut. At this time, the upper boss will transmit the force to the lower boss through the convex point, and the lower boss will be displaced downward by compressing the spring. When the lower boss continues to rotate and the convex points of the upper boss and the lower boss are staggered, the spring will lift the lower boss again, so that the upper boss and the lower boss are matched together, and the gap when the convex points of the upper boss and the lower boss are matched and separated is utilized to achieve an impact effect, which can loosen the nut with larger pre-tightening force, reduce the pre-tightening force of the nut, facilitate the rotation of the nut, and improve work efficiency.

[0012] Furthermore, the driven gear includes two semicircular gears, and first steps are arranged at both ends of each of the semicircular gears, and a pin shaft is installed on the first step.

[0013] Furthermore, the nut sleeve includes two semicircular sleeves, a plurality of fixed keys are evenly distributed on the outer circumference of the nut sleeve, and a plurality of key slots are evenly distributed on the inner circumference of the driven gear, and the key slots cooperate with the fixed keys.

[0014] Furthermore, a cover cap is provided on the upper portion of the nut sleeve, and the cover cap cooperates with the nut.

[0015] Furthermore, the lower boss and the upper boss both have convex points, and the convex points are all arc chamfered.

[0016] Furthermore, the fixing mechanism includes: a first fixing block, a second fixing block, and a pin shaft; the two first fixing blocks are respectively fixed on the side surfaces of the shell facing the nut, and the ends of the first fixing block and the second fixing block both have a second step, and the pin shaft is located in the pin hole on the second step.

[0017] Furthermore, it also includes a fastening bolt, which is located in the threaded hole on the second fixing block.

[0018] Furthermore, the tooth width of the driving gear is relatively large, and both ends of the driving gear are chamfered.

[0019] Furthermore, there are handrails on the side of the shell.

[0020] Compared with the prior art, the present invention provides a nut rotating device, which has the following beneficial effects:

[0021] 1. In the present invention, both the driven gear and the nut sleeve are of open design. When it is not allowed to remove the connectors at both ends of the threaded rod but the nut on the threaded rod needs to be rotated, a nut sleeve matching the nut is selected, and the nut sleeve is directly clamped on the outside of the nut, and the driven gear is clamped on the outside of the nut sleeve. The driving gear is driven by the transmission mechanism, and then the driven gear is driven to rotate, so that the nut can be rotated, which is easy to operate. When the threaded rod is located at a higher position or the space is narrow, workers do not need to operate on site, which can greatly ensure the personal safety of workers. In addition, in actual operations, nut sleeves of different specifications can be selected according to the nut, and the scope of application is wide. The nut rotating device of the present invention adopts electric rotation drive, which is convenient for rotating nuts with large preload force and has high work efficiency.

[0022] The nut rotating device of the present invention is not only suitable for nuts with smaller pre-tightening force, but also suitable for nuts with larger pre-tightening force. When the nut with smaller pre-tightening force is rotated, the lower boss is lifted up and matched with the upper boss, driving the upper transmission shaft and the active gear to rotate, thereby driving the driven gear to rotate and rotate the nut; when the nut with larger pre-tightening force is rotated, the motor drives the lower boss to rotate normally, and the upper boss does not rotate due to the larger pre-tightening force of the nut. At this time, the upper boss will transmit the force to the lower boss through the convex point, and the lower boss will be displaced downward by compressing the spring. When the lower boss continues to rotate and the convex points of the upper boss and the lower boss are staggered, the spring will lift the lower boss again, so that the upper boss and the lower boss are matched together, and the gap when the convex points of the upper boss and the lower boss are matched and separated is utilized to achieve an impact effect, which can loosen the nut with larger pre-tightening force, reduce the pre-tightening force of the nut, facilitate the rotation of the nut, and improve work efficiency.

[0023] 2. The driven gear in the present invention adopts an open design, two semicircular gears are installed through a pin shaft, and the driven gear and the nut sleeve are installed through a keyway on the inner circumference of the driven gear and a fixed key on the outer circumference of the nut sleeve, which makes disassembly and assembly simple and quick.

[0024] 3. In the present invention, a cover cap is also provided on the nut sleeve, which is used to cooperate with the nut during installation, thereby preventing the nut sleeve from falling off and improving the stability of the device.

[0025] 4. The fixing device of the present invention fixes the first fixing block and the second fixing block by means of a pin shaft, and the fastening bolts can lock the fixing mechanism and the threaded rod, thereby fixing the nut rotating device and the threaded rod, thereby improving the overall safety of the device.

[0026] 5. In the present invention, the tooth width of the driving gear is relatively large. When the driven gear moves up and down along the threaded rod, it is convenient for the driven gear to mesh with the driving gear. Chamfers are set at both ends of the driving gear. When the driven gear moves to both ends, it can automatically disengage, which can prevent the driven gear and the driving gear from being damaged. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 is a three-dimensional schematic diagram of a nut rotating device of the present invention;

[0028] Figure 2 It is a three-dimensional schematic diagram of the transmission mechanism structure of the present invention;

[0029] Figure 3 It is a schematic diagram of the cooperation between the upper boss and the lower boss of the present invention;

[0030] Figure 4 It is a schematic diagram of the positions of the lower boss and the spring of the present invention;

[0031] Figure 5 It is a schematic diagram of the cooperation between the driving gear and the driven gear of the present invention;

[0032] Figure 6 is a three-dimensional schematic diagram of the driven gear structure of the present invention;

[0033] Figure 7 It is a three-dimensional schematic diagram of the nut sleeve structure of the present invention;

[0034] Figure 8 is a three-dimensional schematic diagram of the nut sleeve structure of the present invention from another viewing angle;

[0035] Fig. 9 It is a three-dimensional schematic diagram of the cooperation between the nut, the nut sleeve and the driven gear of the present invention;

[0036] Fig.10 is a schematic diagram of the position of the fixing device of the present invention;

[0037] In the figure: 10 threaded rod, 20 housing, 21 handrail, 30 power supply, 40 motor, 50 bearing fixing block, 60 transmission mechanism, 61 lower transmission shaft, 62 upper transmission shaft, 63 lower boss, 64 upper boss, 65 sliding groove, 66 spring, 70 driving gear, 80 driven gear, 81 first step, 82 keyway, 90 nut sleeve, 91 semicircular sleeve, 92 fixing key, 93 cap, 100 fixing mechanism, 101 first fixing block, 102 second fixing block, 110 nut. DETAILED DESCRIPTION

[0038] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in combination with the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0039] The technical solution of the present invention is further described below in conjunction with the accompanying drawings and specific embodiments:

[0040] like Figure 1 As shown, a nut rotating device includes: a housing 20, a power supply 30, a motor 40, a bearing fixing block 50, a transmission mechanism 60, a driving gear 70, a driven gear 80, a nut sleeve 90, and a fixing mechanism 100.

[0041] The housing 20 is provided with a handrail (21) on the side. Figure 2 The power supply 30 is located at the bottom of the housing 20, and the motor 40 is located at the top of the power supply 30. In this embodiment, there are three bearing fixing blocks 50, which are respectively fixed at the upper, middle and lower middle positions in the housing 20.

[0042] like Figure 2-4 As shown, the transmission mechanism 60 also includes: a lower transmission shaft 61, an upper transmission shaft 62, a lower boss 63, an upper boss 64, a sliding groove 65, and a spring 66; the lower transmission shaft 61 is arranged on the bearing fixing block 50, one end of the lower transmission shaft 61 is fixedly connected to the motor 40, the other end of the lower transmission shaft 61 has a boss, the side of the boss has a protrusion, the lower boss 63 is provided with a cavity, the inner wall of the cavity has a sliding groove 65, the protrusion cooperates with the sliding groove 65, the spring 66 is vertically placed in the cavity of the lower boss 63, and the spring 66 can freely expand and contract as the lower boss 63 moves up and down, the two ends of the upper transmission shaft 62 are respectively sleeved on the upper and middle bearing fixing blocks 50, the driving gear 70 is sleeved on the upper transmission shaft 62 and is located between the two bearing fixing blocks 50, the end of the upper transmission shaft 62 close to the lower transmission shaft 61 is fixedly connected to the upper boss 64, the lower boss 63 and the upper boss 64 have convex points, and the convex points are all arc chamfered. Since the vertical distance between the upper boss 64 and the lower boss 63 is very small, the spring 66 is always in a compressed state. When the convex points on the upper boss 64 and the convex points on the lower boss 63 are aligned, the compression of the spring 66 increases. When the convex points on the upper boss 64 and the convex points on the lower boss 63 are staggered, the compression of the spring 66 decreases.

[0043] See also Figure 5 The tooth width of the driving gear 70 is relatively large, and when the driven gear 80 moves up and down along the threaded rod 10, it is convenient for the driven gear 80 to mesh with the driving gear 70. Chamfers are set at both ends of the driving gear 70, and when the driven gear 80 moves to both ends, it can automatically disengage, thereby preventing damage to the driven gear 80 and the driving gear 70.

[0044] See also Figure 1 A window is provided on one side of the housing 20 near the threaded rod 10, through which the driving gear 70 meshes with the driven gear 80, the driven gear 80 is sleeved on the outside of the nut sleeve 90, and the nut sleeve 90 is sleeved on the outside of the nut 110. Figure 6As shown, the driven gear 80 is an open design, composed of two semicircular gears, and a first step 81 is set at both ends of each semicircular gear. A pin hole is opened on the first step 81 for installing a pin shaft when fixing. A plurality of key slots 82 are evenly distributed on the inner circumference of the driven gear 80, which are used to cooperate with the fixed key 92 on the outside of the nut sleeve 90 when fixing and installing. A little material is left above the key slot 82, and when it cooperates with the nut sleeve 90, the driven gear 80 will not fall off. The two semicircular gears are installed by the pin shaft, and the driven gear 80 and the nut sleeve 90 are installed by the key slot 82 and the fixed key 92, and the installation is simple and quick.

[0045] like Figure 7-8 As shown, the nut sleeve 90 is of open design, composed of two semicircular sleeves 91, and a plurality of fixed keys 92 are evenly distributed on the outer circumference of the nut sleeve 90. The fixed keys 92 are used to match with the keyway 82 inside the driven gear 80 during installation. The installation is simple and quick. A cover cap 93 is also provided on the upper part of the nut sleeve 90 for cooperating with the nut 110 during installation to prevent the nut sleeve 90 from falling off.

[0046] The nut 110 is sleeved on the threaded rod 10. Fig. 9 When the nut 110 needs to be rotated, the nut sleeve 90 is clamped on the outside of the nut 110, and the driven gear 80 cooperates with the fixed key 92 through the keyway 82, is clamped on the outside of the nut sleeve 90, and is fixed by the pin shaft.

[0047] The fixing mechanism 100 further includes: a first fixing block 101, a second fixing block 102, a pin, and a fastening bolt. In this embodiment, there are two fixing mechanisms 100, and the two first fixing blocks 101 are respectively fixed at the upper and middle lower positions of the side of the housing 20 facing the threaded rod 10, see Fig.10 The first fixing block 101 and the second fixing block 102 are both semicircular structures. There are second steps at the ends of the first fixing block 101 and the second fixing block 102. A pin hole is opened on the second step for installing the pin shaft when fixing the threaded rod 10. A threaded hole is opened on the side of the second fixing block 102 for installing the fastening bolt when fixing the threaded rod 10.

[0048] Working principle: When the threaded rod 10 is long or there are connectors at both ends of the threaded rod 10, when the nut 110 on the threaded rod 10 needs to be rotated, in actual operation, the conventional closed-end nut rotation tool cannot frame the nut 110 from both ends for rotation. The nut sleeve 90 of the present invention is designed to be open. When the nut 110 needs to be rotated, the nut sleeve 90 is clamped on the outside of the nut 110. The driven gear 80 is also designed to be open. The driven gear 80 is clamped on the outside of the nut sleeve 90 and fixed by a pin. The housing 20 is fixed to the side of the threaded rod 10 by the fixing mechanism 100. When the end of the fastening bolt abuts against the threaded rod 10, the fixing mechanism 100 and the threaded rod 10 can be locked.

[0049] Turn on the motor 40. When the pre-tightening force of the nut 110 is small, the motor 40 drives the lower transmission shaft 61 to rotate upward, pushing the spring 66 to move upward, thereby lifting the lower boss 63 and matching it with the upper boss 64. The lower boss 63 cooperates with the upper boss 64 to drive the upper transmission shaft 62 to rotate, thereby driving the driving gear 70 to rotate, and the driving gear 70 meshes with the driven gear 80, thereby driving the driven gear 80 to rotate, and the nut 110 can be rotated; when the pre-tightening force of the nut 110 is large, the motor 40 drives the lower transmission shaft 61 to rotate upward, pushing the spring 66 to move upward, thereby lifting the lower boss 63 and matching it with the upper boss 64, and the motor 40 drives the lower boss 63 to rotate normally Rotate, the upper boss 64 does not rotate due to the large pre-tightening force of the nut 110. At this time, the upper boss 64 will transfer the force to the lower boss 63 through the convex point, and the lower boss 63 will move downward along the sliding groove 65 by compressing the spring 66. When the motor 40 drives the lower boss 63 to continue to rotate, the convex points of the upper boss 64 and the lower boss 63 are staggered, and the spring 66 will lift the lower boss 63 again, so that the upper boss 64 and the lower boss 63 are matched together, and the gap when the convex points of the upper boss 64 and the lower boss 63 are matched and separated is used to achieve an impact effect, thereby loosening the nut 110, thereby reducing the pre-tightening force of the nut 110, and when the upper boss 64 can rotate with the lower boss 63, the nut 110 can be rotated.

[0050] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features may be replaced by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A nut rotating device, characterized in that: include: A housing (20), a power source (30), a motor (40), a bearing fixing block (50), a transmission mechanism (60), a driving gear (70), a driven gear (80), a nut sleeve (90), and a fixing mechanism (100); The power source (30) is located at the bottom of the housing (20), the motor (40) is located at the top of the power source (30), a plurality of bearing fixing blocks (50) are fixed inside the housing (20), the transmission mechanism (60) is inserted into the bearing fixing blocks (50), the driving gear (70) is sleeved on the transmission mechanism (60), and the transmission mechanism (60) comprises: a lower transmission shaft (61), an upper transmission shaft (62), a lower boss (63), an upper boss (64), a sliding groove (65), and a spring (66); The lower transmission shaft (61) is inserted into the bearing fixing block (50), one end of the lower transmission shaft (61) is fixedly connected to the motor (40), the other end of the lower transmission shaft (61) is provided with a boss, the side surface of the boss is provided with a protrusion, the lower boss (63) is provided with a cavity, the inner wall of the cavity is provided with the sliding groove (65), the protrusion cooperates with the sliding groove (65), the spring (66) is located in the cavity of the lower boss (63), the two ends of the upper transmission shaft (62) are respectively sleeved on the two bearing fixing blocks (50), the driving gear (70) is sleeved on the upper transmission shaft (62) and is located between the two bearing fixing blocks (50), one end of the upper transmission shaft (62) close to the lower transmission shaft (61) is fixedly connected to the upper boss (64), the lower boss (63) and the upper boss (64) are provided with convex points, and the convex points are all arc chamfered; The driven gear (80) and the nut sleeve (90) are both open-type, the driven gear (80) includes two semicircular gears, the nut sleeve (90) includes two semicircular sleeves (91), the driven gear (80) is sleeved outside the nut sleeve (90), the driven gear (80) is meshed with the driving gear (70), and the fixing mechanism (100) is installed on the side of the housing (20).

2. A nut rotating device according to claim 1, characterized in that: A first step (81) is arranged at both ends of each semicircular gear, and a pin shaft is installed on the first step (81).

3. A nut rotating device according to claim 2, characterized in that: A plurality of fixed keys (92) are evenly distributed on the outer circumference of the nut sleeve (90), and a plurality of key slots (82) are evenly distributed on the inner circumference of the driven gear (80), wherein the key slots (82) cooperate with the fixed keys (92).

4. A nut rotating device according to claim 3, characterized in that: The upper part of the nut sleeve (90) is also provided with a cover cap (93), and the cover cap (93) cooperates with the nut.

5. A nut rotating device according to claim 1, characterized in that: The fixing mechanism (100) comprises: a first fixing block (101), a second fixing block (102), and a pin shaft; the two first fixing blocks (101) are respectively fixed on the side surfaces of the housing (20) facing the nut, the ends of the first fixing block (101) and the second fixing block (102) are both provided with a second step, and the pin shaft is located in a pin hole on the second step.

6. A nut rotating device according to claim 5, characterized in that: It also includes a fastening bolt, which is located in a threaded hole on the second fixing block (102).

7. A nut rotating device according to claim 1, characterized in that: Both ends of the driving gear (70) are chamfered.

8. A nut rotating device according to claim 1, characterized in that: The housing (20) has a handrail (21) on its side.

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