Automatic nut twister

Abstract

The utility model relates to nut tightening technical field discloses a kind of automatic nut twisting equipment, and the automatic nut twisting equipment of above-mentioned includes gear mechanism, rotating clasp, propulsion mechanism and fixed clasp.Gear mechanism is provided with installation space and the first position-avoiding passage being communicated with installation space, and the first position-avoiding passage is used to avoid wire rod;Rotating clasp is connected in gear mechanism, and rotating clasp is provided with second position-avoiding passage in the corresponding place of first position-avoiding passage;Propulsion mechanism is slidably arranged relative to gear mechanism;Fixed clasp is arranged on propulsion mechanism, and fixed clasp is provided with third position-avoiding passage.The automatic nut twisting equipment of the utility model does not need to be gradually threaded or taken out in rotating clasp and fixed clasp along wire rod length direction, shortens the assembly, disengagement time of wire rod and rotating clasp, fixed clasp, to improve production efficiency.

Description

Technical Field

[0001] This utility model relates to the field of nut tightening technology, and in particular to an automatic nut tightening device. Background Technology

[0002] Currently, manually tightening the nuts onto the wire screws remains widely used. However, this traditional method has many drawbacks. On the one hand, it is extremely labor-intensive, requiring a large investment of labor resources and increasing production costs. On the other hand, its low efficiency makes it difficult to meet the demands of large-scale, high-efficiency modern production. More importantly, manual tightening cannot precisely guarantee the torque applied during tightening, easily leading to overtightening that damages the wire or nut, or undertightening that results in an unstable connection, seriously affecting product quality and reliability.

[0003] To address the issues of manual tightening, automatic nut tightening equipment has emerged. These devices typically employ a rotating shackle connected to a gear design, controlling the gear's rotation to tighten the nut onto the wire screw, thus improving tightening efficiency and torque control accuracy. However, current automatic nut tightening equipment still has unresolved drawbacks: during nut tightening, the wire screw needs to be engaged within the rotating shackle, requiring the entire wire to pass through it for proper engagement. When the wire is long, this process increases the time spent installing or removing the wire from the shackle, leading to low production efficiency. Utility Model Content

[0004] To address the shortcomings of the prior art, this utility model provides an automatic nut tightening device that eliminates the need to gradually insert or remove the entire wire along its length from the rotating and fixed retaining rings, thereby shortening the assembly and disassembly time between the wire and the rotating and fixed retaining rings and improving production efficiency.

[0005] The technical effect to be achieved by this utility model is realized through the following technical solution: This utility model provides an automatic nut tightening device, comprising: The gear mechanism has an installation space and a first clearance channel communicating with the installation space, the first clearance channel being used to clear wires; A rotating retaining ring is connected to the gear mechanism, and a second clearance channel is provided at the position corresponding to the first clearance channel of the rotating retaining ring; The propulsion mechanism is slidably disposed relative to the gear mechanism; and A retaining ring is provided on the propulsion mechanism, and the retaining ring has a third clearance channel; When the first, second, and third avoidance channels are on the same horizontal plane, the wire can simultaneously pass through the first, second, and third avoidance channels to be inserted into or removed from the rotating retainer and the fixed retainer.

[0006] In some implementations, the third clearance channel is opened upward on the fixed retaining ring.

[0007] In some implementations, the gear mechanism includes an upper gear assembly, a lower gear assembly, and a first driving member. The lower gear assembly meshes with the upper gear assembly, the first driving member is driven and connected to the lower gear assembly, the rotating retaining ring is connected to the upper gear assembly, and the mounting space and the first clearance channel are formed on the upper gear assembly.

[0008] In this implementation, the first driving component drives the lower gear assembly to rotate, the lower gear assembly drives the upper gear assembly to rotate, and in turn drives the rotating retaining ring to rotate, so that the wire and screw rotate, thereby realizing the screw and nut connection.

[0009] In some implementations, the gear mechanism further includes a gear carrier, which has an accommodating space and a fourth clearance channel communicating with the accommodating space, and the upper gear assembly is rotatably mounted in the accommodating space.

[0010] In this implementation, the upper gear assembly drives the rotating retainer to rotate relative to the gear carrier. When the first and second avoidance channels are aligned and connected with the fourth avoidance channel, the wire can be inserted into or removed from the rotating retainer.

[0011] In some implementations, the fourth clearance channel is opened upward on the gear carrier.

[0012] In some implementations, the lower gear assembly includes a first gear, a second gear, and a third gear. The second gear and the third gear are arranged in parallel to each other. The second gear meshes with the first gear and the upper gear assembly, respectively. The third gear meshes with the first gear and the upper gear assembly, respectively. The first driving member is driven to connect to the first gear.

[0013] In this implementation, when the first clearance channel of the upper gear assembly rotates to the position of the second gear, the third gear engages with the upper gear assembly, thereby driving the upper gear assembly to rotate; and when the first clearance channel of the upper gear assembly rotates to the position of the third gear, the second gear engages with the upper gear assembly, thereby driving the upper gear assembly to rotate.

[0014] In some implementations, the inner peripheral wall of the retaining ring has a protrusion extending toward the center of the retaining ring.

[0015] In some implementations, the inner peripheral walls of the rotating retaining ring and / or the fixed retaining ring are configured as non-rotational surfaces that mate with a nut or bolt.

[0016] In this implementation, the outer periphery of the nut is tightly fitted with the inner peripheral wall of the rotating retainer, thereby ensuring the reliability of the engagement between the screw and the rotating retainer. This allows the screw to rotate together when the rotating retainer rotates, improving the screw's torsional resistance. The outer periphery of the nut is tightly fitted with the inner peripheral wall of the fixed retainer, thereby ensuring the reliability of the engagement between the nut and the fixed retainer.

[0017] In some implementations, the automatic nut tightening device further includes a base, a slide rail, and a slider, wherein the slide rail is connected to the base, the slider is connected to the propulsion mechanism, and the slider is slidably connected to the slide rail.

[0018] In some implementations, the propulsion mechanism includes a sliding plate and a second driving member, the retaining ring is disposed on the sliding plate, and the second driving member is driven to connect to the sliding plate so that the sliding plate moves closer to or further away from the gear mechanism.

[0019] In summary, this utility model has at least the following advantages: The automatic nut tightening device provided by this utility model allows the first clearance channel of the gear mechanism, the second clearance channel of the rotating retaining ring, and the third clearance channel of the fixed retaining ring to be on the same horizontal plane. This enables the wire to pass through the first clearance channel, the second clearance channel, and the third clearance channel simultaneously to complete the loading or unloading operation. It eliminates the need to gradually insert or remove the entire wire along its length from the rotating and fixed retaining rings, thus shortening the assembly and unloading time of the wire with the rotating and fixed retaining rings and improving production efficiency. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the automatic nut tightening device of Example 1; Figure 2 This is a schematic diagram of the screw and nut in Example 1 during tightening. Figure 3 This is an exploded view of the automatic nut tightening device of Example 2; Figure 4 This is an exploded view of the automatic nut-tightening device of Example 3.

[0021] Marked in the image: 100. Gear mechanism; 101. Installation space; 102. First clearance channel; 110. Upper gear assembly; 120. Lower gear assembly; 121. First gear; 122. Second gear; 123. Third gear; 130. First driving component; 140. Gear frame; 141. Accommodation space; 142. Fourth clearance channel; 200. Rotating retaining ring; 201. Second avoidance channel; 300. Propulsion mechanism; 310. Sliding plate; 320. Second driving component; 400. Fixed retaining ring; 401. Third clearance channel; 410. Protrusion; 500, base; 600, slide rail; 700, slider; 800, wire; 900, screw; 910, nut; 1000, Nuts. Detailed Implementation

[0022] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. The described embodiments are some, but not all, of the embodiments of this utility model.

[0023] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0024] Example 1: Please see the appendix Figure 1 ~Appendix Figure 3 The automatic nut tightening device of this utility model includes a gear mechanism 100, a rotating retaining ring 200, a propulsion mechanism 300, and a fixed retaining ring 400.

[0025] In this regard, please combine Figures 1-3 , Figure 1 and Figure 2 The diagram illustrates the structural relationship between the gear mechanism 100, the rotating retaining ring 200, the propulsion mechanism 300, and the fixed retaining ring 400 in this embodiment of the present invention. Figure 3The diagram illustrates the specific structure of the first clearance channel 102 in this embodiment of the present invention. Specifically, the gear mechanism 100 has an installation space 101 and a first clearance channel 102 communicating with the installation space 101. The first clearance channel 102 is used to clearance the wire 800. A rotating retaining ring 200 is connected to the gear mechanism 100, and a second clearance channel 201 is provided at the corresponding position of the rotating retaining ring 200 and the first clearance channel 102. A pushing mechanism 300 is slidably disposed relative to the gear mechanism 100. A fixed retaining ring 400 is disposed on the pushing mechanism 300, and a third clearance channel 401 is provided on the fixed retaining ring 400. When the first clearance channel 102, the second clearance channel 201, and the third clearance channel 401 are on the same horizontal plane, the wire 800 can simultaneously pass through the first clearance channel 102, the second clearance channel 201, and the third clearance channel 401 to be inserted into or removed from the rotating retaining ring 200 and the fixed retaining ring 400.

[0026] In this embodiment, a screw 900 and a nut 1000 are fitted onto the wire 800. The nut 910 of the screw 900 is engaged and fixed with the rotating retaining ring 200, and the nut 1000 is engaged and fixed with the fixed retaining ring 400. During the tightening operation, the gear mechanism 100 is activated to rotate the rotating retaining ring 200, thereby driving the screw 900 and the wire 800 to rotate. At the same time, the pushing mechanism 300 is activated synchronously. The pushing mechanism 300 slides relative to the gear mechanism 100, thereby driving the nut 1000 closer to the screw 900. Under the rotation of the gear mechanism 100, the nut 1000 is gradually tightened onto the screw 900.

[0027] It is understandable that, since the gear mechanism 100 has an interconnected installation space 101 and a first clearance channel 102, the rotating retainer 200 has a second clearance channel 201, and the fixed retainer 400 has a third clearance channel 401, when the first clearance channel 102, the second clearance channel 201, and the third clearance channel 401 are on the same horizontal plane, the wire 800 enters the installation space 101 through the first clearance channel 102, while the screw 900 is engaged in the rotating retainer 200 through the second clearance channel 201, and the nut 1000 is engaged in the fixed retainer 400 through the third clearance channel 401. This simplifies the assembly process of the wire 800, screw 900, and nut 1000 with the rotating retainer 200 and the fixed retainer 400 respectively, thereby improving production efficiency.

[0028] It should be noted that when the gear mechanism 100 is activated, causing the rotating retaining ring 200 to rotate the screw 900 and the wire 800, the propulsion mechanism 300 is activated simultaneously, causing the fixing retaining ring 400 to move the nut 1000 closer to the screw 900. When the propulsion mechanism 300 moves to the preset position, the gear mechanism 100 cuts off the power source to prevent the propulsion mechanism 300 from continuing to advance, which could lead to mechanical interference with the gear mechanism 100 and cause the nut 1000 to fail to tighten. Preferably, the travel distance of the propulsion mechanism 300 can be controlled by a control program.

[0029] In the aforementioned automatic nut tightening device, the first clearance channel 102 of the gear mechanism 100, the second clearance channel 201 of the rotating retainer 200, and the third clearance channel 401 of the fixed retainer 400 can be on the same horizontal plane. This allows the wire 800 to pass through the first clearance channel 102, the second clearance channel 201, and the third clearance channel 401 simultaneously to complete the loading or unloading operation. It eliminates the need to gradually insert or remove the entire wire 800 along its length from the rotating retainer 200 and the fixed retainer 400, thus shortening the assembly and unloading time of the wire 800 with the rotating retainer 200 and the fixed retainer 400, thereby improving production efficiency.

[0030] Example 2: The difference between this embodiment and Embodiment 1 is that this embodiment further optimizes the structure of the automatic nut tightening device of this utility model. Please refer to the appendix. Figure 3 .

[0031] The third avoidance channel 401 is opened upward on the fixed retaining ring 400.

[0032] In this embodiment, the third clearance channel 401 is opened upward on the fixed retaining ring 400. That is, the fixed retaining ring 400 has the third clearance channel 401 opening upward. When the first clearance channel 102 of the gear mechanism 100 and the second clearance channel 201 of the rotating retaining ring 200 are rotated to face upward, the wire 800, screw 900 and nut 1000 can be simultaneously inserted into the rotating retaining ring 200 and the fixed retaining ring 400 in the vertical direction, or simultaneously removed from the rotating retaining ring 200 and the fixed retaining ring 400 in the vertical direction, which improves the convenience of disassembly and assembly and further reduces the disassembly and assembly time.

[0033] In some preferred embodiments, please refer to Figure 3 , Figure 3The diagram illustrates the structural relationship between the upper gear assembly 110, the lower gear assembly 120, and the first driving member 130 in this embodiment of the present invention. Specifically, the gear mechanism 100 includes an upper gear assembly 110, a lower gear assembly 120, and a first driving member 130. The lower gear assembly 120 meshes with the upper gear assembly 110, the first driving member 130 is driven and connected to the lower gear assembly 120, a rotating retaining ring 200 is connected to the upper gear assembly 110, and an installation space 101 and a first clearance channel 102 are formed on the upper gear assembly 110. The first driving member 130 drives the lower gear assembly 120 to rotate, which in turn drives the upper gear assembly 110 to rotate, thereby driving the rotating retaining ring 200 to rotate, so that the wire 800 and the screw 900 rotate, thereby realizing the screw connection between the screw 900 and the nut 1000.

[0034] In some preferred embodiments, the gear mechanism 100 further includes a gear carrier 140, which has an accommodating space 141 and a fourth clearance channel 142 communicating with the accommodating space 141. The upper gear assembly 110 is rotatably mounted within the accommodating space 141. The upper gear assembly 110 drives the rotating retainer 200 to rotate relative to the gear carrier 140. When the first clearance channel 102 and the second clearance channel 201 are aligned and connected with the fourth clearance channel 142, the wire 800 can be inserted into or removed from the rotating retainer 200. The gear carrier 140 is provided to make the overall structure more compact and to protect the gear mechanism 100, thereby extending the service life of the gear mechanism 100.

[0035] In some preferred embodiments, the fourth clearance channel 142 is formed upward on the gear carrier 140. That is, the gear carrier 140 has a fourth clearance channel 142 forming upward. When the gear mechanism 100 drives the rotating retainer 200 to rotate, so that the first clearance channel 102 and the second clearance channel 201 are formed upward, the wire 800 can be inserted into the rotating retainer 200 in the vertical direction, or taken out of the rotating retainer 200 in the vertical direction, which improves the convenience of disassembly and assembly and further reduces the disassembly and assembly time.

[0036] In some more preferred embodiments, the lower gear assembly 120 includes a first gear 121, a second gear 122, and a third gear 123. The second gear 122 and the third gear 123 are arranged parallel to each other. The second gear 122 meshes with the first gear 121 and the upper gear assembly 110, respectively. The third gear 123 meshes with the first gear 121 and the upper gear assembly 110, respectively. A first driving member 130 is driven to rotate the first gear 121. The first driving member 130 drives the first gear 121 to rotate, which in turn drives the second gear 122 to rotate. The second gear 122 drives the upper gear assembly 110 to rotate, and the upper gear assembly 110 drives the third gear 123 to rotate. The third gear 123 meshes with the first gear 121, realizing the effective movement of the gear mechanism 100. It is understandable that, since the second gear 122 and the third gear 123 are arranged in parallel, when the first clearance channel 102 of the upper gear assembly 110 rotates to the position of the second gear 122, the third gear 123 engages with the upper gear assembly 110, thereby driving the upper gear assembly 110 to rotate; conversely, when the first clearance channel 102 of the upper gear assembly 110 rotates to the position of the third gear 123, the second gear 122 engages with the upper gear assembly 110, thereby driving the upper gear assembly 110 to rotate. This ensures the reliability of the gear mechanism 100 driving the rotating retaining ring 200 to rotate.

[0037] Example 3: The difference between this embodiment and Embodiment 2 is that this embodiment further optimizes the structure of the automatic nut tightening device of this utility model. Please refer to the appendix. Figure 3 ~Appendix Figure 4 .

[0038] Please see below. Figure 4 , Figure 4 The diagram illustrates the specific structure of the protrusion 410 in this embodiment of the present invention. Specifically, the protrusion 410 extends from the inner peripheral wall of the retaining ring 400 toward the center of the retaining ring 400.

[0039] In this embodiment, the nut 1000 is placed inside the retaining ring 400, and the protrusion 410 limits the nut 1000 to prevent it from shifting as the push mechanism 300 approaches the gear mechanism 100. That is, the nut 1000 is limited in the horizontal direction, thereby ensuring that the nut 1000 can be tightened on the screw 900.

[0040] In some preferred embodiments, the inner peripheral walls of the rotating retaining ring 200 and / or the fixed retaining ring 400 are configured as non-rotating surfaces that mate with the nut 910 or the bolt 1000. The outer periphery of the nut 910 is tightly fitted with the inner peripheral wall of the rotating retaining ring 200, thereby ensuring the reliability of the engagement between the screw 900 and the rotating retaining ring 200. This allows the screw 900 to rotate together when the rotating retaining ring 200 rotates, improving the torsional resistance of the screw 900. The outer periphery of the bolt 1000 is tightly fitted with the inner peripheral wall of the fixed retaining ring 400, thereby ensuring the reliability of the engagement between the bolt 1000 and the fixed retaining ring 400. When the rotating retaining ring 200 rotates the screw 900 and the wire 800, the bolt 1000 approaches the bolt 900 under the action of the pushing mechanism 300 and engages with the rotating retaining ring 200, so that the bolt 1000 is tightened onto the bolt 900.

[0041] In some preferred embodiments, please refer to Figure 3 , Figure 3 The diagram illustrates the structural relationship between the slide rail 600 and the slider 700 in this embodiment of the invention. Specifically, the automatic nut tightening device further includes a base 500, a slide rail 600, and a slider 700. The slide rail 600 is connected to the base 500, and the slider 700 is connected to the propulsion mechanism 300, with the slider 700 slidably connected to the slide rail 600. The slider 700 slides along the slide rail 600, thereby driving the propulsion mechanism 300 to move, allowing the propulsion mechanism 300 to smoothly approach or move away from the gear mechanism 100, ensuring the stability of the propulsion mechanism 300 during movement, and further ensuring the stability of the nut 1000 when screwed to the screw 900.

[0042] In some more preferred embodiments, the propulsion mechanism 300 includes a sliding plate 310 and a second driving member 320. A retaining ring 400 is disposed on the sliding plate 310, and the second driving member 320 is driven to connect to the sliding plate 310, so that the sliding plate 310 moves closer to or further away from the gear mechanism 100. The second driving member 320 drives the sliding plate 310 to slide, thereby driving the retaining ring 400 to move, so as to make the retaining ring 400 move closer to or further away from the gear mechanism 100, ensuring the reliability of the overall structure.

[0043] The automatic nut tightening device of this utility model allows the first clearance channel 102 of the gear mechanism 100, the second clearance channel 201 of the rotating retainer 200, and the third clearance channel 401 of the fixed retainer 400 to be on the same horizontal plane. This enables the wire 800 to pass through the first clearance channel 102, the second clearance channel 201, and the third clearance channel 401 simultaneously to complete the loading or unloading operation. It eliminates the need to gradually insert or remove the entire wire 800 along its length from the rotating retainer 200 and the fixed retainer 400, thus shortening the assembly and unloading time of the wire 800 with the rotating retainer 200 and the fixed retainer 400, thereby improving production efficiency.

[0044] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0045] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this utility model is in use. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first," "second," and "third," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0046] Furthermore, terms such as "horizontal," "vertical," and "sag" do not imply that components must be absolutely horizontal or suspended, but rather that they can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal relative to "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0047] In this invention, unless otherwise expressly specified and limited, "above or below" the first feature may include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on" the first feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the first feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0048] Although the description of this utility model has been given in conjunction with the specific embodiments described above, it is obvious to those skilled in the art that many substitutions, modifications, and variations can be made based on the above description. Therefore, all such substitutions, modifications, and variations are included within the spirit and scope of the appended claims.

Claims

1. An automatic nut tightening device, characterized in that, include: The gear mechanism (100) has an installation space (101) and a first avoidance channel (102) communicating with the installation space (101), the first avoidance channel (102) being used to avoid the wire (800). A rotating retaining ring (200) is connected to the gear mechanism (100), and a second clearance channel (201) is provided at the corresponding position of the rotating retaining ring (200) and the first clearance channel (102). The propulsion mechanism (300) is slidably disposed relative to the gear mechanism (100); and A retaining ring (400) is disposed on the propulsion mechanism (300), and the retaining ring (400) has a third clearance channel (401). When the first avoidance channel (102), the second avoidance channel (201) and the third avoidance channel (401) are on the same horizontal plane, the wire (800) can pass through the first avoidance channel (102), the second avoidance channel (201) and the third avoidance channel (401) simultaneously to be inserted into or removed from the rotating retaining ring (200) and the fixed retaining ring (400).

2. The automatic nut tightening device according to claim 1, characterized in that, The third clearance channel (401) is opened upward on the fixed retaining ring (400).

3. The automatic nut tightening device according to claim 1, characterized in that, The gear mechanism (100) includes an upper gear assembly (110), a lower gear assembly (120), and a first drive member (130). The lower gear assembly (120) meshes with the upper gear assembly (110), the first drive member (130) is driven to the lower gear assembly (120), the rotating retainer (200) is connected to the upper gear assembly (110), and the mounting space (101) and the first clearance channel (102) are formed on the upper gear assembly (110).

4. The automatic nut tightening device according to claim 3, characterized in that, The gear mechanism (100) further includes a gear carrier (140), which has an accommodating space (141) and a fourth clearance channel (142) communicating with the accommodating space (141). The upper gear assembly (110) is rotatably installed in the accommodating space (141).

5. The automatic nut tightening device according to claim 4, characterized in that, The fourth clearance channel (142) is opened upward on the gear frame (140).

6. The automatic nut tightening device according to claim 3, characterized in that, The lower gear assembly (120) includes a first gear (121), a second gear (122), and a third gear (123). The second gear (122) and the third gear (123) are arranged parallel to each other. The second gear (122) meshes with the first gear (121) and the upper gear assembly (110) respectively. The third gear (123) meshes with the first gear (121) and the upper gear assembly (110) respectively. The first driving member (130) is driven to the first gear (121).

7. The automatic nut tightening device according to claim 1, characterized in that, The inner peripheral wall of the retaining ring (400) has a protrusion (410) extending toward the center of the retaining ring (400).

8. The automatic nut tightening device according to claim 1, characterized in that, The inner peripheral walls of the rotating retaining ring (200) and / or the fixed retaining ring (400) are configured as non-rotational surfaces that mate with the nut (910) or the bolt (1000).

9. The automatic nut tightening device according to claim 1, characterized in that, It also includes a base (500), a slide rail (600) and a slider (700), the slide rail (600) being connected to the base (500), the slider (700) being connected to the propulsion mechanism (300), and the slider (700) being slidably connected to the slide rail (600).

10. The automatic nut tightening device according to claim 1, characterized in that, The propulsion mechanism (300) includes a sliding plate (310) and a second driving member (320). The fixing ring (400) is disposed on the sliding plate (310), and the second driving member (320) is driven to the sliding plate (310) so that the sliding plate (310) moves closer to or further away from the gear mechanism (100).

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