Stirrup pretightening force applying device

Abstract

The utility model relates to the technical field of reinforcement cage production and manufacturing, and particularly discloses a stirrup pre-tightening force applying device which comprises a track base, a stirrup pre-tightening force applying device and a stirrup pre-tightening force applying device. The movable platform is arranged on the track base, and the movable platform can move along the track base; the pre-tightening force applying mechanism is arranged on the moving platform, and the pre-tightening force applying mechanism is used for applying pre-tightening force to the reinforcing steel bars; and the driving assembly is arranged on the track base and is connected with the moving platform. The pre-tightening device has the advantages that pre-tightening force can be applied to the outer stirrup in advance to enable the outer stirrup to have a certain radian, the outer stirrup can be attached to the main reinforcement more tightly, and therefore the overall stability of the manufactured reinforcement cage is better.

Description

Technical Field

[0001] The utility model relates to the technical field of steel cage production and manufacturing, in particular to a stirrup pre-tightening force applying device. Background Art

[0002] In the current manufacturing process of the outer stirrups of the steel cage, the outer stirrups are usually directly wound on the steel cage skeleton without applying any pre-tightening force. This process mainly relies on manual operation, including the use of spot welding or traditional binding methods to fix the connection points between the outer stirrups and the main bars of the steel cage. However, this method has the following obvious defects: the outer stirrups and the steel cage are fixed by spot welding, which has the defect of easily burning the main bars or stirrups; because the outer stirrups have a certain rigidity, even if their diameter is relatively small, it is difficult to completely maintain the same roundness as the steel cage skeleton during the winding process, resulting in gaps between the joints. The gaps not only affect the quality of spot welding or binding, but may also cause the connection points between the outer stirrups and the main bars to loosen and fall off easily, thereby affecting the overall stability of the steel cage and the uniformity of the spacing between the outer stirrups. Utility Model Content

[0003] In view of the above-mentioned deficiencies in the prior art, the purpose of the utility model is to provide a stirrup pre-tightening force applying device, which has the advantage of being able to apply pre-tightening force to the outer stirrups in advance so that the outer stirrups have a certain curvature, so that the outer stirrups can fit more closely on the main reinforcement, thereby making the overall stability of the manufactured steel cage better.

[0004] The above technical objectives of the utility model are achieved through the following technical solutions:

[0005] A stirrup pre-tightening force applying device, comprising:

[0006] Track base;

[0007] A mobile platform, the mobile platform is arranged on the track base, and the mobile platform can move along the track base;

[0008] A pre-tightening force applying mechanism, the pre-tightening force applying mechanism is arranged on the mobile platform, and the pre-tightening force applying mechanism is used to apply a pre-tightening force to the steel bars;

[0009] A driving assembly is arranged on the track base and connected to the mobile platform.

[0010] Compared with the prior art, the present application provides a pre-tightening force applying mechanism on the mobile platform, which can apply pre-tightening force in advance to the outer stirrups used to make the steel cage, so that the outer stirrups have a certain curvature, so that the outer stirrups can fit the main reinforcement more closely when wrapped around the main reinforcement, thereby effectively improving the overall stability of the steel cage. Secondly, through the cooperation of the driving assembly and the mobile platform, the winding spacing of the outer stirrups can be effectively controlled, thereby improving the overall quality of the steel cage.

[0011] As a preferred solution of the utility model, the preload force applying mechanism comprises:

[0012] A mounting seat, the mounting seat is arranged on the mobile platform;

[0013] At least two groups of pressing roller assemblies, wherein the pressing roller assemblies are arranged on the mounting seat;

[0014] A pre-tightening roller assembly is arranged on the mounting seat and is located between two groups of clamping roller assemblies.

[0015] By adopting the above-mentioned solution, the process of applying the preload force is further refined through the combination of the mounting seat and the clamping roller assembly, so that the preload roller assembly can apply the preload force to the external stirrups more accurately and controllably.

[0016] As a preferred solution of the utility model, the pressing roller assembly comprises:

[0017] A clamping and fixing seat, wherein the clamping and fixing seat is arranged on the mounting seat and has a first mounting cavity therein;

[0018] A compression screw, the compression screw being threadedly connected to the top wall of the compression fixing seat, and a portion of the compression screw being located in the first installation cavity;

[0019] A clamping fixed roller, the clamping fixed roller being arranged on the bottom wall of the clamping fixed seat;

[0020] A first rolling wheel fixing seat, wherein the first rolling wheel fixing seat is arranged in the first mounting cavity, a pressing movable roller is arranged on the bottom wall of the first rolling wheel fixing seat, and a first limiting column is arranged on the top wall of the first rolling wheel fixing seat;

[0021] A first pre-tightening member, wherein the first pre-tightening member is sleeved on the first limiting column, a first pressing member is arranged between the first pre-tightening member and the pressing screw, one end of the first pre-tightening member is connected to the top wall of the first rolling wheel fixing seat, and the other end is connected to the first pressing member.

[0022] By adopting the above-mentioned scheme, the position of the first rolling wheel fixing seat can be adjusted by rotating the clamping screw, so as to adjust the position of the clamping rolling wheel and achieve the purpose of clamping the stirrups; secondly, through the setting of the first tightening member and the first pre-tightening member, flexible pressure can be applied to the stirrups, which can avoid the problem of damage to the clamping fixed roller or the clamping movable roller when the stirrups suddenly change position.

[0023] As a preferred solution of the utility model, the preload roller assembly comprises:

[0024] A pre-tightening fixing seat, the pre-tightening fixing seat is arranged on the mounting seat, and a second mounting cavity is provided in the pre-tightening fixing seat, wherein the pre-tightening fixing seat is arranged between two groups of pressing roller assemblies;

[0025] A pre-tightening screw, wherein the pre-tightening screw is threadedly connected to the top wall of the pre-tightening fixing seat, and a portion of the pre-tightening screw is located in the second mounting cavity;

[0026] A second rolling wheel fixing seat, wherein the second rolling wheel fixing seat is arranged in the second mounting cavity, a pre-tightened rolling wheel is arranged on the bottom wall of the second rolling wheel fixing seat, and a second limiting column is arranged on the top wall of the second rolling wheel fixing seat;

[0027] A second pre-tightening member, the second pre-tightening member is sleeved on the second limiting column, a second top tightening member is arranged between the second pre-tightening member and the pre-tightening screw, one end of the second pre-tightening member is connected to the top wall of the second rolling wheel fixing seat, and the other end is connected to the second top tightening member.

[0028] By adopting the above-mentioned scheme, the position of the second rolling wheel fixing seat can be adjusted by rotating the preload screw, thereby adjusting the position of the preload rolling wheel, thereby adjusting the preload force applied to the stirrups, further refining the preload force application process, and making the preload force applied to the stirrups more precise and controllable.

[0029] As a preferred solution of the utility model, the mobile platform includes a platform body, the bottom wall of the platform body is provided with at least four groups of pulleys, and the pulleys are embedded in the track base.

[0030] By adopting the above-mentioned scheme, the pulley arranged on the mobile platform can allow the platform body to move smoothly along the track base, which is convenient for adjusting the position of the preload force application mechanism, thereby achieving more precise control of the winding spacing of the stirrups on the main reinforcement, improving flexibility and efficiency, and also improving the manufacturing quality of the steel cage.

[0031] As a preferred solution of the utility model, the drive assembly includes:

[0032] A driving motor, wherein the driving motor is arranged on the track base;

[0033] A driving gear and a driven gear, wherein the driving gear is arranged on a driving shaft of the driving motor, and the driven gear is rotatably arranged on the track base, wherein the mobile platform is located between the driving gear and the driven gear;

[0034] A transmission belt, one end of which is connected to the mobile platform, and the other end of which is sequentially wound around the driving gear and the driven gear and connected to the mobile platform.

[0035] By adopting the above solution, the position of the mobile platform can be adjusted through the cooperation of the driving motor, the driving gear, the driven gear and the transmission belt.

[0036] As a preferred solution of the utility model, the track base includes a base and a channel steel, and the channel steel is arranged on the base and connected to the mobile platform.

[0037] By adopting the above scheme, the pulley on the mobile platform can cooperate with the channel steel, so that the platform body can move stably along the channel steel, avoiding the problem of the mobile platform tipping over due to the oblique force exerted by the steel cage on the stirrups during the production process, and effectively improving the overall operating stability of the device.

[0038] The above-mentioned stirrup pre-tightening force applying device has the following beneficial effects: by arranging a pre-tightening force applying mechanism on the mobile platform, pre-tightening force can be applied in advance to the outer stirrups used to make the steel cage, so that the outer stirrups have a certain curvature, so that the outer stirrups can fit the main reinforcement more closely when they are wound around the main reinforcement, effectively improving the overall stability of the steel cage, and because the stirrups have pre-tightening tension, after the outer stirrups are wound, the main reinforcement and the inner reinforcement hoop are in a stress micro-strain state, as long as the two ends of a complete outer stirrup are clamped with buckles, and the middle segment is also clamped with buckles, the fixation of the outer stirrups and the main reinforcement no longer needs to be spot welded or wired; secondly, through the cooperation of the driving assembly and the mobile platform, the winding spacing of the outer stirrups can be effectively controlled, thereby improving the overall quality of the steel cage. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] Figure 1 It is a structural schematic diagram of a stirrup pre-tightening force applying device of the utility model;

[0040] Figure 2 It is a top view of a stirrup pre-tightening force applying device of the utility model;

[0041] Figure 3 for Figure 2 Sectional view at AA in the middle;

[0042] Figure 4 for Figure 2Sectional view at the middle BB;

[0043] Figure 5 It is a structural schematic diagram of a mobile platform in a stirrup pre-tightening force applying device of the utility model;

[0044] Figure 6 It is a structural schematic diagram of a pressing roller assembly in a stirrup pre-tightening force applying device of the utility model;

[0045] Figure 7 It is a structural schematic diagram of a pre-tightening roller assembly in a stirrup pre-tightening force applying device of the utility model;

[0046] In the figure: 1, track base; 11, base; 12, channel steel; 2, mobile platform; 21, platform body; 22, pulley; 3, preload force applying mechanism; 31, mounting seat; 32, pressing roller assembly; 321, pressing fixed seat; 322, first mounting cavity; 323, pressing screw; 324, pressing fixed roller; 325, first rolling wheel fixing seat; 326, pressing movable roller; 327, first limiting column; 328, first preload member ; 329, first tensioning member; 33, pre-tightening roller assembly; 331, pre-tightening fixed seat; 332, second mounting cavity; 333, pre-tightening screw; 334, second rolling wheel fixed seat; 335, pre-tightening rolling wheel; 336, second limiting column; 337, second pre-tightening member; 338, second tensioning member; 4, driving assembly; 41, driving motor; 42, driving gear; 43, driven gear; 44, transmission belt; 5, stirrups; 6, receiving groove.

[0047] The realization of the purpose, functional features and advantages of the utility model will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0048] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0049] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back...), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture. If the specific posture changes, the directional indications will also change accordingly.

[0050] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the utility model, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features limited to "first" and "second" may explicitly or implicitly include at least one of the features. In addition, if "and / or" or "and / or" appears in the full text, its meaning includes three parallel solutions. Taking "A and / or B" as an example, it includes solution A, solution B, or solutions that satisfy both A and B. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the utility model.

[0051] The utility model provides a stirrup pre-tightening force applying device.

[0052] Reference Figure 1 and Figure 2 In one embodiment of the utility model, the pre-tightening force applying device for stirrups 5 comprises: a track base 1, a mobile platform 2, a pre-tightening force applying mechanism 3 and a driving assembly 4, wherein the mobile platform 2 is arranged on the track base 1 and can move along the track base 1; the pre-tightening force applying mechanism 3 is arranged on the mobile platform 2, and the pre-tightening force applying mechanism 3 is used to apply pre-tightening force to the steel bars; the driving assembly 4 is arranged on the track base 1 and connected to the mobile platform 2. By arranging the pre-tightening force applying mechanism 3 on the mobile platform 2, the pre-tightening force can be applied in advance to the outer stirrups 5 used to make the steel cage, so that the outer stirrups 5 have a certain curvature, so that the outer stirrups 5 can be more closely attached to the main bars when they are wound around the main bars, effectively improving the overall stability of the steel cage, and secondly, through the cooperation of the driving assembly 4 and the mobile platform 2, the winding spacing of the outer stirrups 5 can be effectively controlled, thereby improving the overall quality of the steel cage.

[0053] Reference Figure 1 and Figure 2 as well as Figures 4 to 7In one embodiment, the preload force applying mechanism 3 includes: a mounting seat 31, at least two groups of clamping roller assemblies 32 and a preload roller assembly 33. The mounting seat 31 is fixedly mounted on the mobile platform 2 by bolts. In some other embodiments, the mounting seat 31 can also be connected to the mobile platform 2 by welding. As long as the mounting seat 31 can be fixed on the mobile platform 2, the specific connection method between the mounting seat 31 and the mobile platform 2 is not limited here. In this embodiment, the number of clamping roller assemblies 32 is two groups, and both groups of clamping roller assemblies 32 are arranged on the mounting seat 31. In some other embodiments, the number of clamping roller assemblies 32 can be increased according to actual needs, which will not be repeated here. The preload roller assembly 33 is arranged on the mounting seat 31, and the preload roller assembly 33 is located between the two groups of clamping roller assemblies 32. Through the combination of the mounting seat 31 and the clamping roller assembly 32, the preload force applying process is further refined, so that the preload roller assembly 33 can apply the preload force to the outer stirrup 5 more accurately and controllably.

[0054] Reference Figure 5 and Figure 6In one embodiment, the clamping roller assembly 32 includes: a clamping fixed seat 321, a clamping screw 323, a clamping fixed roller 324, a first rolling wheel fixing seat 325 and a first preload member 328. The clamping fixed seat 321 is fixedly mounted on the mounting seat 31 by bolts, and the clamping fixed seat 321 has a first mounting cavity 322. In some other embodiments, the clamping fixed seat 321 can also be fixed to the mounting seat 31 by welding. As long as the clamping fixed seat 321 can be fixedly set on the mounting seat 31, the specific connection method between the clamping fixed seat 321 and the mounting seat 31 is not limited here; one end of the clamping screw 323 passes through the top wall of the clamping fixed seat 321 and is threadedly connected to the top wall of the clamping fixed seat 321. A portion of the tightening screw 323 is located in the first installation cavity 322; the clamping fixed roller 324 is installed on the bottom wall of the clamping fixed seat 321 through a rotating shaft; the first rolling wheel fixing seat 325 is located in the first installation cavity 322, and the bottom wall of the first rolling wheel fixing seat 325 is installed with a clamping movable roller 326 through a rotating shaft, and the top wall of the first rolling wheel fixing seat 325 is welded with a first limiting column 327; the first pre-tightening member 328 is sleeved on the first limiting column 327, and a first pressing member 329 is arranged between the first pre-tightening member 328 and the clamping screw 323, one end of the first pre-tightening member 328 is welded to the top wall of the first rolling wheel fixing seat 325, and the other end is in contact with the first pressing member 329. In this embodiment, the first pre-tightening member 328 adopts a spring. It is worth noting that both the fixed pressing roller 324 and the pressing rolling wheel are provided with a receiving groove 6 for accommodating the stirrup 5, and the stirrup 5 is located between the fixed pressing roller 324 and the pressing rolling wheel. By rotating the pressing screw 323, the pressing screw 323 can apply pressure to the top member, thereby compressing the first pre-tightening member 328. The first pre-tightening member 328 is compressed by the pressure, and the elastic force generated acts on the first rolling wheel fixing seat 325, and acts on the stirrup 5 through the pressing rolling wheel and the fixed pressing roller 324, thereby achieving the purpose of clamping; secondly, by setting the first top member 329 and the first pre-tightening member 328, a flexible pressure can be applied to the stirrup 5, which can avoid the problem of damage to the fixed pressing roller 324 or the dynamic pressing roller 326 when the stirrup 5 suddenly changes position.

[0055] Reference Figure 7In one embodiment, the pre-tightening roller assembly 33 includes: a pre-tightening fixed seat 331, a pre-tightening screw 333, a second rolling wheel fixed seat 334 and a second pre-tightening member 337. The pre-tightening fixed seat 331 is fixedly installed on the mounting seat 31 by bolts, and the pre-tightening fixed seat 331 has a second mounting cavity 332, wherein the pre-tightening fixed seat 331 is arranged between the two groups of pressing roller assemblies 32. In some other embodiments, the pre-tightening fixed seat 331 can also be fixed to the mounting seat 31 by welding. As long as the pre-tightening fixed seat 331 can be fixedly set on the mounting seat 31, the specific connection method between the pre-tightening fixed seat 331 and the mounting seat 31 is not limited here; one end of the pre-tightening screw 333 passes through the pre-tightening fixed seat 33 1 and is threadedly connected with the top wall of the pre-tightening fixing seat 331, a part of the pre-tightening screw 333 is located in the second installation cavity 332; the second rolling wheel fixing seat 334 is located in the second installation cavity 332, the bottom wall of the second rolling wheel fixing seat 334 is provided with a pre-tightening rolling wheel 335 through a rotating shaft, and the top wall of the second rolling wheel fixing seat 334 is welded with a second limiting column 336; the second pre-tightening member 337 is sleeved on the second limiting column 336, and a second top tightening member 338 is arranged between the second pre-tightening member 337 and the pre-tightening screw 333, one end of the second pre-tightening member 337 is welded with the top wall of the second rolling wheel fixing seat 334, and the other end is abutted and connected with the second top tightening member 338. In this embodiment, the second pre-tightening member 337 adopts a spring. It is worth noting that the pre-tightening rolling wheel 335 is also provided with a receiving groove 6 for accommodating the stirrup 5. By rotating the pre-tightening screw 333, the position of the second rolling wheel fixing seat 334 can be adjusted to achieve the adjustment of the position of the pre-tightening rolling wheel 335, thereby achieving the adjustment of the pre-tightening force applied to the stirrup 5, further refining the pre-tightening force application process, and making the pre-tightening force applied to the stirrup 5 more precise and controllable.

[0056] Reference Figure 3 and Figure 5In one embodiment, the mobile platform 2 includes a platform body 21, and the bottom wall of the platform body 21 is provided with at least four groups of pulleys 22. The track base 1 includes a base 11 and a channel steel 12. The channel steel 12 is provided on the base 11 and connected to the mobile platform 2, and the pulley 22 is located in the opening of the channel steel 12. In this embodiment, four groups of pulleys 22 are provided, and two channel steels 12 are provided. The two channel steels 12 are mirror-set along the central axis of the base 11 and the opening of the channel steel 12 faces outward. In some other embodiments, in order to further improve the stability of the platform body 21 during movement, the number of pulleys 22 and / or channel steels 12 can also be increased. The number of pulleys 22 and channel steels 12 is not specifically limited here. The pulleys 22 provided on the mobile platform 2 can allow the platform body 21 to move smoothly along the track base 1, which is convenient for adjusting the position of the preload force applying mechanism 3, so as to achieve more accurate control of the winding spacing of the stirrups 5 on the main bars, improve flexibility and efficiency, and also improve the manufacturing quality of the steel cage. The pulley 22 on the mobile platform 2 can cooperate with the channel steel 12, so that the platform body 21 can move stably along the channel steel 12, avoiding the problem of the mobile platform 2 tipping over due to the oblique force exerted by the steel cage on the stirrups 5 during the manufacturing process, thereby effectively improving the overall operating stability of the device.

[0057] Reference Figure 1 and Figure 2 In one embodiment, the driving assembly 4 includes: a driving motor 41, a transmission belt 44, a driving gear 42 and a driven gear 43. The driving motor 41 is fixedly mounted on the track base 1 by bolts; the driving gear 42 is mounted on the driving shaft of the driving motor 41 by bolts, and the driven gear 43 is rotatably arranged on the track base 1. Specifically, a gear mounting seat 31 is fixedly mounted on the base 11 by welding, and the driven gear 43 is mounted on the gear mounting seat 31 by a rotating shaft; wherein the mobile platform 2 is located between the driving gear 42 and the driven gear 43; one end of the transmission belt 44 is connected to the mobile platform 2 by bolts, and the other end is wound around the driving gear 42 and the driven gear 43 in sequence and connected to the mobile platform 2 by bolts. In this embodiment, the transmission belt 44 adopts a chain. Through the cooperation of the driving motor 41, the driving gear 42, the driven gear 43 and the transmission belt 44, the position adjustment of the mobile platform 2 can be achieved.

[0058] The above description is only a preferred embodiment of the present invention, and does not limit the patent scope of the present invention. All equivalent structural changes made by using the contents of the present invention specification and drawings under the inventive concept of the present invention, or directly / indirectly applied in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A stirrup pre-tightening force applying device, characterized in that: include: Track base; A mobile platform, the mobile platform is arranged on the track base, and the mobile platform can move along the track base; A pre-tightening force applying mechanism, the pre-tightening force applying mechanism is arranged on the mobile platform, and the pre-tightening force applying mechanism is used to apply a pre-tightening force to the steel bars; A driving assembly is arranged on the track base and connected to the mobile platform.

2. The stirrup pre-tightening force applying device according to claim 1, characterized in that: The preload force applying mechanism comprises: A mounting seat, the mounting seat is arranged on the mobile platform; At least two groups of pressing roller assemblies, wherein the pressing roller assemblies are arranged on the mounting seat; A pre-tightening roller assembly is arranged on the mounting seat and is located between two groups of clamping roller assemblies.

3. The stirrup pre-tightening force applying device according to claim 2, characterized in that: The pressing roller assembly comprises: A clamping and fixing seat, wherein the clamping and fixing seat is arranged on the mounting seat and has a first mounting cavity therein; A compression screw, the compression screw being threadedly connected to the top wall of the compression fixing seat, and a portion of the compression screw being located in the first installation cavity; A clamping fixed roller, the clamping fixed roller being arranged on the bottom wall of the clamping fixed seat; A first rolling wheel fixing seat, wherein the first rolling wheel fixing seat is arranged in the first mounting cavity, a pressing movable roller is arranged on the bottom wall of the first rolling wheel fixing seat, and a first limiting column is arranged on the top wall of the first rolling wheel fixing seat; A first pre-tightening member, wherein the first pre-tightening member is sleeved on the first limiting column, a first pressing member is arranged between the first pre-tightening member and the pressing screw, one end of the first pre-tightening member is connected to the top wall of the first rolling wheel fixing seat, and the other end is connected to the first pressing member.

4. The stirrup pre-tightening force applying device according to claim 2, characterized in that: The preload roller assembly includes: A pre-tightening fixing seat, the pre-tightening fixing seat is arranged on the mounting seat, and a second mounting cavity is provided in the pre-tightening fixing seat, wherein the pre-tightening fixing seat is arranged between two groups of pressing roller assemblies; A pre-tightening screw, wherein the pre-tightening screw is threadedly connected to the top wall of the pre-tightening fixing seat, and a portion of the pre-tightening screw is located in the second mounting cavity; A second rolling wheel fixing seat, wherein the second rolling wheel fixing seat is arranged in the second mounting cavity, a pre-tightened rolling wheel is arranged on the bottom wall of the second rolling wheel fixing seat, and a second limiting column is arranged on the top wall of the second rolling wheel fixing seat; A second pre-tightening member, the second pre-tightening member is sleeved on the second limiting column, a second top tightening member is arranged between the second pre-tightening member and the pre-tightening screw, one end of the second pre-tightening member is connected to the top wall of the second rolling wheel fixing seat, and the other end is connected to the second top tightening member.

5. The stirrup pre-tightening force applying device according to claim 1, characterized in that: The mobile platform comprises a platform body, the bottom wall of which is provided with at least four groups of pulleys, and the pulleys are embedded in the track base.

6. The stirrup pre-tightening force applying device according to claim 1, characterized in that: The drive assembly comprises: A driving motor, wherein the driving motor is arranged on the track base; A driving gear and a driven gear, wherein the driving gear is arranged on a driving shaft of the driving motor, and the driven gear is rotatably arranged on the track base, wherein the mobile platform is located between the driving gear and the driven gear; A transmission belt, one end of which is connected to the mobile platform, and the other end of which is sequentially wound around the driving gear and the driven gear and connected to the mobile platform.

7. The stirrup pre-tightening force applying device according to claim 1, characterized in that: The track base includes a base and a channel steel, wherein the channel steel is arranged on the base and connected to the mobile platform.

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