Building structure reinforcing device

Abstract

The utility model discloses a building structure reinforcing device, which belongs to the technical field of building reinforcing devices and comprises a bottom plate. The two baffles are arranged at the upper end of the bottom plate, the two baffles are located at the two opposite ends of the bottom plate correspondingly, the two baffles are movably connected with the bottom plate, and the two baffles are used for supporting a building structure; the adjusting mechanism is arranged on the bottom plate, the adjusting mechanism is connected with the two baffles, and the adjusting mechanism is used for adjusting the distance between the two baffles; and the carrying mechanism is movably arranged on the bottom plate, the carrying mechanism is configured to be capable of protruding and being hidden on the bottom plate, and the carrying mechanism is used for moving the baffle. According to the utility model, a stable supporting effect can be formed, the problem of shaking caused by factors such as uneven ground or wind power is avoided, on the other hand, a convenient carrying function is provided, and the demand on manpower is greatly reduced, so that the manpower cost and the labor intensity are reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to building reinforcing device technical field especially is related to a building structure reinforcing device. BACKGROUND

[0002] In the long use process, because the concrete strength is not enough, load increases, section design is not enough and so on, the structure such as beam of some buildings appears deflection too big, crack and so on, influence the use safety and durability of structure, therefore need to reinforce the beam body, and carry out support.

[0003] The building reinforcing device of prior art, the device volume is huge and heavy, lack convenient carrying mechanism, therefore need to cooperate to complete the carrying task by many people, this not only increases the labor cost, also limits the use of device in narrow space or complex terrain, in the emergency repair or temporary reinforcement scene, often become the key factor of restricting work efficiency. UTILITARIAN CONTENT

[0004] The utility model is provided with a building structure reinforcing device, which can provide convenient carrying function, reduce the demand for labor, and thus reduce labor cost and labor intensity.

[0005] The building structure reinforcing device provided by the embodiment of the utility model has at least the following beneficial effects: the carrying mechanism is arranged on the bottom plate, the whole device is moved by the carrying mechanism, and the carrying mechanism is hidden in the bottom plate during the supporting work, the ground is contacted by the bottom plate, on the one hand, a stable supporting effect is formed, the shaking problem caused by uneven ground or wind force and the like is avoided, on the other hand, a convenient carrying function is provided, the demand for labor is greatly reduced, and thus labor cost and labor intensity are reduced.

[0006] The building structure reinforcing device provided by the embodiment of the utility model has at least the following beneficial effects: the carrying mechanism is arranged on the bottom plate, the whole device is moved by the carrying mechanism, and the carrying mechanism is hidden in the bottom plate during the supporting work, the ground is contacted by the bottom plate, on the one hand, a stable supporting effect is formed, the shaking problem caused by uneven ground or wind force and the like is avoided, on the other hand, a convenient carrying function is provided, the demand for labor is greatly reduced, and thus labor cost and labor intensity are reduced.

[0007] According to some embodiments of the utility model, the driving mechanism is arranged on the bottom plate, the adjusting mechanism is connected with the bottom plate through the driving mechanism, and the driving mechanism is used for adjusting the height of the adjusting mechanism.

[0008] According to some embodiments of the utility model, the carrying mechanism includes four carrying assemblies, and the four carrying assemblies are arranged in a rectangular shape on the bottom plate.

[0009] According to some embodiments of the utility model, the carrying assembly includes: a roller, a rotating shaft is arranged on the roller, the rotating shaft is rotationally connected with the bottom plate, and one end of the rotating shaft is provided with a gear; a telescopic rod, the telescopic rod is movably arranged on the bottom plate, a toothed plate is fixedly arranged on the telescopic rod along the length direction, the toothed plate is configured to mesh with the gear, the gear and the toothed plate are meshed by moving the telescopic rod, and the roller is controlled to protrude and retract on the bottom plate by rotating the rotating shaft.

[0010] According to some embodiments of the utility model, the carrying assembly further includes a rotating block, the roller is rotationally arranged on the rotating block, the rotating shaft is fixedly arranged in the rotating block, and the gear is located on one side of the rotating block.

[0011] According to some embodiments of the utility model, the carrying assembly further includes: a frame body, the frame body is fixedly arranged on the bottom plate, the frame body extends along the length direction of the telescopic rod, the frame body is slidably connected with the telescopic rod, a limiting groove is formed in the frame body along the length direction, and the toothed plate is embedded in the frame body; a limiting block, the limiting block is fixedly arranged on the toothed plate, the limiting block is located in the limiting groove, and the limiting block is configured to slide along the channel limited by the limiting groove.

[0012] According to some embodiments of the utility model, the adjusting mechanism includes: a supporting plate, the supporting plate is arranged on the bottom plate; an adjusting assembly, the adjusting assembly is arranged on the supporting plate, the adjusting assembly is connected with the two baffle plates, and the adjusting assembly is used for driving the baffle plates to move close to each other and move away from each other.

[0013] According to some embodiments of the utility model, the adjusting assembly includes: a groove, the groove is arranged on the supporting plate, and the groove extends along the direction of the straight line where the two baffle plates are located; two threaded blocks, one threaded block is arranged corresponding to each baffle plate, each threaded block is fixedly connected with the corresponding baffle plate through a plurality of connecting rods, the two threaded blocks and the plurality of connecting rods are configured to move along the channel limited by the groove; a right threaded rod and an inverse threaded rod, the right threaded rod is coaxially arranged on the inverse threaded rod, the right threaded rod and the inverse threaded rod are oppositely arranged in the outer thread, the right threaded rod and the inverse threaded rod are arranged in the corresponding threaded blocks; a driving member, the driving member is fixedly arranged on the supporting plate, the right threaded rod and the inverse threaded rod are selectively connected with the driving member through a transmission gear, and the driving member drives the right threaded rod and the inverse threaded rod to rotate through the transmission gear, so that the two baffle plates move towards each other and move away from each other.

[0014] According to some embodiments of the utility model, the transmission gear includes a driven bevel gear and a driving bevel gear, the driving member is in transmission connection with the driving bevel gear, the driving bevel gear is in meshing connection with the driven bevel gear, the right threaded rod and the inverse threaded rod are selectively provided with the driven bevel gear, and the driving member drives the right threaded rod and the inverse threaded rod to rotate through the driving bevel gear and the driven bevel gear.

[0015] The additional aspects and advantages of the present application will be in part apparent and in part pointed out hereinafter in the description of the application. BRIEF DESCRIPTION OF DRAWINGS

[0016] The present application will be further described below in conjunction with the drawings and embodiments.

[0017] Figure 1 The structural schematic view of the building structure reinforcing device of the present application;

[0018] Figure 2 The structural schematic view of the middle base plate; Figure 1

[0019] The structural schematic view of the middle carrying mechanism; Figure 3 Figure 2 The structural schematic view of the middle adjusting mechanism.

[0020] Figure 4 Figure 1 The structural schematic view of the middle adjusting mechanism.

[0021] Reference signs:

[0022] Base plate 100;

[0023] Baffle 200;

[0024] Adjusting mechanism 300, support plate 310, adjusting assembly 320, groove 321, threaded block 322, connecting rod 3221, right-handed threaded rod 323, left-handed threaded rod 324, driving member 325, transmission gear 326, driving bevel gear 3261, driven bevel gear 3262;

[0025] Carrying mechanism 400, carrying assembly 410, roller 411, rotating shaft 412, gear 413, telescopic rod 414, toothed plate 415, rotating block 416, frame body 417, limiting groove 418, limiting block 419;

[0026] Driving mechanism 500. DETAILED DESCRIPTION

[0027] This part will describe the specific embodiments of the present application in detail, the preferred embodiments of the present application are shown in the drawings, the role of the drawings is to supplement the description of the text part with figures, so that people can intuitively and visually understand each technical feature and the overall technical scheme of the present application, but it cannot be understood as the limitation of the protection scope of the present application.

[0028] ​​In the description of the utility model, need understanding, if relate to the direction description, for example the direction or positional relation of indication such as upper, lower, front, back, left, right is based on the direction or positional relation shown in drawing, only for the convenience of describing the utility model and simplifying the description, and is not the indication or the suggestion of the device or the element that the indicated must have the specific direction, with the specific direction configuration and operation, therefore can not be understood as the restriction of the utility model.

[0029] In the description of the utility model, the meaning of several is one or more, the meaning of multiple is two or more, greater than, less than, exceed and the like are understood as not including the number, above, below, within and the like are understood as including the number.If there is a description to the first time, the second time is only used for distinguishing the technical features for the purpose, and can not be understood as indicating or suggesting relative importance or implicitly indicating the number of indicated technical features or implicitly indicating the sequence of indicated technical features.

[0030] In the description of the utility model, unless otherwise explicitly limited, the words such as setting, installation, connection should be understood in a broad sense, and the person skilled in the art can reasonably determine the specific meaning of the above words in the utility model according to the specific content of the technical scheme.

[0031] Reference Figures 1 to 4 The building structure reinforcing device according to the utility model embodiment is described.

[0032] As Figures 1 to 4 Indicated, the building structure reinforcing device includes a bottom plate 100;Two baffle plates 200, two baffle plates 200 are arranged at the upper end of bottom plate 100, two baffle plates 200 are respectively located at the opposite ends of bottom plate 100, two baffle plates 200 are all movably connected with bottom plate 100, two baffle plates 200 are used for supporting building structure;Adjusting mechanism 300, adjusting mechanism 300 is arranged on bottom plate 100, adjusting mechanism 300 is connected with two baffle plates 200, adjusting mechanism 300 is used for adjusting the distance between two baffle plates 200;Carrying mechanism 400, carrying mechanism 400 is movably arranged on bottom plate 100, carrying mechanism 400 is configured to protrude and hide on bottom plate 100, carrying mechanism 400 is used for moving baffle plate 200.

[0033] As Figure 1As shown, the carrying mechanism 400 is arranged on the bottom plate 100, the adjusting mechanism 300 is arranged at the upper end of the bottom plate 100, and two baffle plates 200 are arranged at the left and right ends of the adjusting mechanism 300, wherein the two baffle plates 200 are arranged in the vertical direction, and the bottom plate 100 is arranged in the horizontal direction. Therefore, by arranging the carrying mechanism 400 on the bottom plate 100, the whole device is moved by the carrying mechanism 400, and the carrying mechanism 400 is hidden in the bottom plate 100 when supporting work is carried out, and the bottom plate 100 contacts the ground. On the one hand, a stable supporting effect is formed, and the shaking problem caused by uneven ground or wind and the like is avoided, and on the other hand, a convenient carrying function is provided, and the demand for labor is greatly reduced, thereby reducing the labor cost and labor intensity.

[0034] In some embodiments of the utility model, it further includes driving mechanism 500, driving mechanism 500 sets up on the bottom plate 100, adjusting mechanism 300 is connected with the bottom plate 100 through driving mechanism 500, and driving mechanism 500 is used to adjust the height of adjusting mechanism 300. Figure 1 As shown, the driving mechanism 500 is two air cylinders arranged in the vertical direction, and the two air cylinders are symmetrically arranged on the bottom plate 100, and the output ends of the two air cylinders are fixedly connected with the adjusting mechanism 300.

[0035] In some embodiments of the utility model, the carrying mechanism 400 includes four carrying assemblies 410, and the four carrying assemblies 410 are arranged in a rectangular shape on the bottom plate 100.

[0036] In some embodiments of the utility model, the carrying assembly 410 includes: a roller 411, a rotating shaft 412 is arranged on the roller 411, the rotating shaft 412 is rotatably connected with the bottom plate 100, and a gear 413 is arranged at one end of the rotating shaft 412; a telescopic rod 414 is movably arranged on the bottom plate 100, a toothed plate 415 is fixedly arranged on the telescopic rod 414 in the length direction, the toothed plate 415 is configured to be engaged with the gear 413, and the gear 413 and the toothed plate 415 are engaged by moving the telescopic rod 414 to control the roller 411 to protrude and retract on the bottom plate 100 by rotating the rotating shaft 412.

[0037] In some embodiments of the utility model, the carrying assembly 410 further includes a rotating block 416, the roller 411 is rotatably arranged on the rotating block 416, the rotating shaft 412 is fixedly arranged in the rotating block 416, and the gear 413 is located on one side of the rotating block 416.

[0038] In some specific embodiments of the utility model, the carrying assembly 410 further includes: a frame body 417 fixedly arranged on the bottom plate 100, the frame body 417 extends along the length direction of the telescopic rod 414, the frame body 417 is slidably connected with the telescopic rod 414, the frame body 417 is provided with a limiting groove 418 along the length direction, and the toothed plate 415 is embedded in the frame body 417; a limiting block 419 fixedly arranged on the toothed plate 415, the limiting block 419 is located in the limiting groove 418, and the limiting block 419 is configured to slide along the channel limited by the limiting groove 418.

[0039] As shown in Figure 2 and Figure 3 In the specific embodiment, the bottom plate 100 is a rectangular panel, four carrying assemblies 410 are arranged at the four corners of the bottom plate 100 respectively, rectangular grooves corresponding to the carrying assemblies 410 are formed at the four corners of the bottom plate 100, a rotating shaft 412 is movably arranged in the rectangular groove, a roller 411 is fixedly connected to the outer side of the rotating shaft 412, a gear 413 is fixedly arranged at one end of the rotating shaft 412, a toothed plate 415 is movably arranged at one side of the gear 413 in the rectangular groove, and the toothed plate 415 is engaged with the gear 413. Specifically, the rotating shaft 412 is movably arranged in the rectangular groove through a bearing, a rotating block 416 is fixedly arranged on the outer side of the rotating shaft 412, the roller 411 is connected to one side of the rotating block 416, the gear 413 is fixedly arranged at one end of the rotating shaft 412, a frame body 417 is fixedly arranged at one side of the gear 413 in the rectangular groove, the toothed plate 415 is movably arranged in the frame body 417, the toothed plate 415 is embedded in the frame body 417 and slidably attached to the inner wall of the frame body 417, a limiting groove 418 is formed in one side of the frame body 417, the limiting groove 418 is arranged along the length direction of the rack, a limiting block 419 is movably arranged in the limiting groove 418, the limiting block 419 is fixedly arranged on the rack and slidably attached to the inner wall of the limiting groove 418. The telescopic rod 414 is arranged in the rectangular groove through slotting at one side of the frame body 417, and the output end of the telescopic rod 414 is fixedly connected to one side of the toothed plate 415. Thus, the rotating shaft 412 can drive the rotating block 416 and the roller 411 to swing, the gear 413 can drive the rotating shaft 412 to rotate, the toothed plate 415 moves forward and backward under the pushing of the telescopic rod 414, thereby driving the gear 413 to rotate, and under the limiting action of the limiting groove 418 and the limiting block 419, the toothed plate 415 can be further prevented from being separated from the frame body 417.

[0040] In some specific embodiments of the utility model, the adjusting mechanism 300 includes: a supporting plate 310 arranged on the bottom plate 100; an adjusting assembly 320 arranged on the supporting plate 310, the adjusting assembly 320 is connected with the two baffles 200, and the adjusting assembly 320 is used for driving the baffles 200 to move close to each other and move away from each other.

[0041] In some embodiments of the utility model, adjusting assembly 320 includes: recess 321, recess 321 set up on support plate 310, recess 321 extends along the direction of the straight line of two baffle plates 200;Two threaded blocks 322, each baffle plate 200 is correspondingly provided with one threaded block 322, each threaded block 322 is fixedly connected with the corresponding baffle plate 200 through a plurality of connecting rods 3221, two threaded blocks 322 and a plurality of connecting rods 3221 are configured to be movable along the channel limited by recess 321;Right screw rod 323 and reverse screw rod 324, right screw rod 323 is coaxially arranged on reverse screw rod 324, the outside thread of right screw rod 323 and reverse screw rod 324 is oppositely arranged, right screw rod 323 and reverse screw rod 324 are arranged in the corresponding threaded block 322;Driving part 325, driving part 325 is fixedly arranged on support plate 310, right screw rod 323 and reverse screw rod 324 are selectively connected with driving part 325 through transmission gear 326, driving part 325 drives right screw rod 323 and reverse screw rod 324 to rotate through transmission gear 326, so that two baffle plates 20 move towards and away from each other.

[0042] In some embodiments of the utility model, transmission gear 326 includes driven bevel gear 3262 and driving bevel gear 3261, driving part 325 is in transmission connection with driving bevel gear 3261, driving bevel gear 3261 is engaged with driven bevel gear 3262, right screw rod 323 and reverse screw rod 324 are selectively provided with driven bevel gear 3262, driving part 325 drives right screw rod 323 and reverse screw rod 324 to rotate through driving bevel gear 3261 and driven bevel gear 3262.

[0043] As Figure 3 And Figure 4 As shown in the drawings, support plate 310 one side is provided with a recess 321 extending along the left and right direction, the recess 321 inside movably installs two threaded blocks 322, one end of two threaded blocks 322 is fixedly installed with four connecting rods 3221, each threaded block 322 is fixedly connected with baffle plate 200 through four connecting rods 3221 penetrating recess 321.

[0044] Specifically, the positive screw rod 323 and the reverse screw rod 324 are movably arranged in the groove 321, the positive screw rod 323 and the reverse screw rod 324 are fixedly connected in the axial direction, the threads on the outer sides of the positive screw rod 323 and the reverse screw rod 324 are opposite, and the two screw rods are movably arranged with the threaded blocks 322 through the threads. Specifically, the threaded blocks 322 are in sliding fit with the inner walls of the groove 321, four connecting rods 3221 are fixedly arranged on one end of each threaded block 322 close to the corresponding baffle 200, the four connecting rods 3221 penetrate through the groove 321 and are fixedly connected with the corresponding baffles 200, a driven bevel gear 3262 is fixedly arranged between the two screw rods, a driving bevel gear 3261 is movably arranged in the groove 321 and close to the driven bevel gear 3262 through a bearing, and the driving bevel gear 3261 is in meshing connection with the driven bevel gear 3262. A driving member 325 is arranged on one side of the supporting plate 310 through a fixing seat, and in this specific embodiment, the driving member 325 is a servo motor, and the output end of the servo motor is in transmission connection with the shaft of the driving bevel gear 3261 through a shaft coupling. Therefore, since the threads on the outer sides of the positive screw rod 323 and the reverse screw rod 324 are opposite, when the two screw rods rotate in the same direction, the two threaded blocks 322 are driven to move towards or away from each other, thereby driving the baffles 200 to move close to or away from the supporting plate 310, and the driven bevel gear 3262 cooperates with the driving bevel gear 3261, thereby realizing the rotation of the screw rods driven by the servo motor.

[0045] The building structure reinforcing device will be described below through a specific embodiment.

[0046] An old commercial complex located in the center of a city needs emergency reinforcement to ensure safe use because of the slight cracks and deformation of part of the floor structure due to the long age of the building. The internal structure of the building is complex, the floor heights are different, and the surrounding traffic is busy, which puts high requirements on the efficiency and safety of the reinforcement work. The project team decides to use the device to assist in construction, and the specific implementation steps are as follows:

[0047] Firstly, a professional engineer team carries out a comprehensive survey of the commercial complex, records the crack position, size and distribution, and evaluates the damage degree of the structure;

[0048] Secondly, the building structure reinforcing device is pushed to the area that needs to be reinforced and supported. Specifically, the telescopic rod 414 is started to push the toothed plate 415 to move away from the bottom plate 100, the toothed plate 415 drives the gear 413 and the rotating shaft 412 to rotate in the process of moving, and then the rotating shaft 412 drives the roller 411 to overturn until the roller 411 contacts the ground and lifts up the bottom plate 100, and then the pushing device moves;

[0049] Then, the building structure reinforcing device is pushed to the designated position, and then the telescopic rod 414 is operated in reverse until the roller 411 is turned over to the inside of the rectangular groove, so that the bottom plate 100 contacts the ground.

[0050] Finally, according to the actual situation of the building structure, the distance between the two side plates 200 is adjusted, specifically, the servo motor is started to drive the two threaded rods to rotate, the right threaded rod 323 and the reverse threaded rod 324 drive the corresponding threaded blocks 322 to move respectively, and the two threaded blocks 322 drive the two side plates 200 to move synchronously until the side plates 200 are clamped on both sides of the building structure.

[0051] It should be noted that the reinforcing part is continuously monitored for a period of time after the reinforcement is completed, and data such as crack change and structure deformation are recorded to evaluate the reinforcement effect.

[0052] The above describes the embodiments of the utility model in detail in combination with the drawings, but the utility model is not limited to the above-mentioned embodiments, and various changes can be made within the knowledge range possessed by ordinary skilled persons in the technical field without departing from the purpose of the utility model.

Claims

1. A building structure reinforcing device characterized by comprising: The utility model relates to a building structure support device, which comprises the following components: a bottom plate (100); two baffle plates (200) arranged at the upper end of the bottom plate (100), the two baffle plates (200) being respectively located at the opposite ends of the bottom plate (100) and being movably connected to the bottom plate (100), the two baffle plates (200) being used for supporting a building structure; an adjusting mechanism (300) arranged on the bottom plate (100), the adjusting mechanism (300) being connected to the two baffle plates (200) and being used for adjusting the distance between the two baffle plates (200); a carrying mechanism (400) movably arranged on the bottom plate (100), the carrying mechanism (400) being configured to be protrudable and retractable on the bottom plate (100) and being used for moving the baffle plates (200).

2. The building structure reinforcing device according to claim 1, characterized by, The utility model further comprises a driving mechanism (500) arranged on the bottom plate (100), the adjusting mechanism (300) being connected to the bottom plate (100) through the driving mechanism (500), and the driving mechanism (500) being used for adjusting the height of the adjusting mechanism (300).

3. The building structure reinforcing device according to claim 1, characterized by, The carrying mechanism (400) comprises four carrying assemblies (410) arranged in a rectangular shape on the bottom plate (100).

4. The building structure reinforcing device according to claim 3, characterized by The carrying assembly (410) comprises: a roller (411) provided with a rotating shaft (412), the rotating shaft (412) being rotatably connected to the bottom plate (100), and one end of the rotating shaft (412) being provided with a gear (413); a telescopic rod (414) movably arranged on the bottom plate (100), the telescopic rod (414) being fixedly provided with a toothed plate (415) along the length direction, the toothed plate (415) being configured to be engaged with the gear (413), the gear (413) and the toothed plate (415) being engaged by moving the telescopic rod (414) so as to control the roller (411) to protrude from or be retracted into the bottom plate (100) by rotating the rotating shaft (412).

5. The building structure reinforcing device according to claim 4, characterized by The carrying assembly (410) further comprises a rotating block (416), the roller (411) being rotatably arranged on the rotating block (416), the rotating shaft (412) being fixedly arranged in the rotating block (416), and the gear (413) being located on one side of the rotating block (416). The carrying assembly (410) further comprises:

6. The building structure reinforcing device according to claim 4, wherein a frame (417) fixedly arranged on the bottom plate (100), the frame (417) extending along the length direction of the telescopic rod (414), the frame (417) being slidably connected to the telescopic rod (414), the frame (417) being provided with a limiting groove (418) along the length direction, and the toothed plate (415) being embedded in the frame (417). ​ A limiting block 419 is fixedly arranged on the tooth plate 415, is located in the limiting groove 418, and is configured to slide along the limiting groove 418.

7. The building structure reinforcing device according to claim 1, characterized by The adjusting mechanism 300 comprises: A support plate 310 is arranged on the bottom plate 100; An adjusting assembly 320 is arranged on the support plate 310, is connected with the two baffle plates 200, and is used to drive the baffle plates 200 to move close to or away from each other.

8. The building structure reinforcing device according to claim 7, characterized by The adjusting assembly 320 comprises: A groove 321 is arranged on the support plate 310 and extends along the direction of the straight line where the two baffle plates 200 are located; Two threaded blocks 322 are arranged corresponding to the two baffle plates 200 respectively, each threaded block 322 is fixedly connected with the corresponding baffle plate 200 through a plurality of connecting rods 3221, and the two threaded blocks 322 and the plurality of connecting rods 3221 are configured to move along the limiting groove 321; A right-handed threaded rod 323 and a left-handed threaded rod 324 are coaxially arranged, the right-handed threaded rod 323 is arranged opposite to the outside threads of the left-handed threaded rod 324, and the right-handed threaded rod 323 and the left-handed threaded rod 324 are respectively arranged in the corresponding threaded blocks; A driving member 325 is fixedly arranged on the support plate 310, the right-handed threaded rod 323 and the left-handed threaded rod 324 are selectively connected with the driving member 325 through a transmission gear 326, and the driving member 325 drives the right-handed threaded rod 323 and the left-handed threaded rod 324 to rotate through the transmission gear 326, so that the two baffle plates 200 move towards or away from each other.

9. The building structure reinforcing device according to claim 8, characterized by, The transmission gear 326 comprises a driven bevel gear 3262 and a driving bevel gear 3261, the driving member 325 is in transmission connection with the driving bevel gear 3261, the driving bevel gear 3261 is in meshing connection with the driven bevel gear 3262, the right-handed threaded rod 323 and the left-handed threaded rod 324 are selectively provided with the driven bevel gear 3262, and the driving member 325 drives the right-handed threaded rod 323 and the left-handed threaded rod 324 to rotate through the driving bevel gear 3261 and the driven bevel gear 3262.

Images