Concrete forming device for building and civil engineering

Abstract

The invention relates to the technical field of concrete forming, in particular to a concrete forming device for building and civil engineering, which comprises a forming box, a vibrating mechanism is arranged in the forming box, a lifting mechanism is arranged on the inner wall of the forming box, and a box cover is mounted at the top of the forming box through a lock catch. The outer wall of the forming box is fixedly connected with a controller, and binding posts are installed on the outer wall of the forming box. The concrete forming device comprises a forming box, a vibrating mechanism is arranged in the forming box, the vibrating mechanism comprises a fixed sleeve fixedly connected into the forming box, a piston plate is slidably connected into the fixed sleeve, and a reset spring is fixedly connected to the position, in the fixed sleeve, of the outer wall of the piston plate. The vibrating mechanism in the device is used for vibrating the concrete mold, and the problems that a vibrating mechanism arranged in an existing concrete forming device can only knock the single position of the concrete mold, and the vibrating effect is poor are solved.

Description

Technical Field

[0001] The present invention relates to the technical field of concrete forming, and specifically relates to a concrete forming device for construction and civil engineering. Background Art

[0002] Concrete refers to the general term for engineering composite materials in which aggregate is cemented into a whole by a cementing material. Usually, the term concrete refers to cement concrete, also known as ordinary concrete, which uses cement as the cementing material, sand and stone as aggregate, and is mixed with water in a certain proportion and stirred. It is widely used in civil engineering. After concrete is stirred, it needs to be put into a concrete forming device for forming.

[0003] However, the existing concrete forming devices still have deficiencies. Specifically, the vibrating mechanism provided in the existing concrete forming device can only strike a single position of the concrete mold, and the vibrating effect is poor.

[0004] Therefore, a concrete forming device for construction and civil engineering is needed to solve the problems raised in the above background art. Summary of the Invention

[0005] The purpose of the present invention is to provide a concrete forming device for construction and civil engineering to solve the problems raised in the above background art.

[0006] To achieve the above purpose, the present invention provides the following technical solutions: A concrete forming device for construction and civil engineering, including a forming box. A vibrating mechanism is arranged inside the forming box, a lifting mechanism is arranged on the inner wall of the forming box, a box cover is installed on the top of the forming box through a buckle, a controller is fixedly connected to the outer wall of the forming box, and a wiring terminal is installed on the outer wall of the forming box; The vibrating mechanism includes a fixed sleeve fixedly connected inside the forming box. A piston plate is slidably connected inside the fixed sleeve. A return spring is fixedly connected to the outer wall of the piston plate inside the fixed sleeve. A vibrating rod is fixedly connected to the outer wall of the piston plate on the side away from the return spring. A push rod is fixedly connected to the outer wall of the piston plate near the position of the return spring. A sliding seat is slidably connected inside the forming box near the position of the fixed sleeve. Connecting blocks are fixedly connected to both the top and bottom of the sliding seat. Sliding racks are fixedly connected to the outer walls of the connecting blocks on the side away from the sliding seat. Driving gears are meshed and connected to the outer walls of the sliding racks inside the forming box. A servo motor is fixedly connected to the top of the driving gear. Guide rollers are slidably connected to the outer walls of the sliding racks at the corners inside the forming box. A fixed block is fixedly connected to the outer wall of the sliding seat near the position of the fixed sleeve. A protective pad is fixedly connected to the outer wall of the vibrating rod outside the fixed sleeve; The lifting mechanism includes a lifting frame fixedly connected to the bottom of the forming box. A guide rod is slidably connected inside the lifting frame. A towing rope is slidably connected inside the guide rod at a position corresponding to the lifting frame. A winding shaft is fixedly connected to the outer wall of the towing rope inside the forming box. A winding motor is fixedly connected to the outer wall of the winding shaft. A clamping block is slidably connected to the outer wall of the lifting frame. An electric push rod is fixedly connected to the outer wall of the clamping block inside the lifting frame. Both the forming box and the box cover are made of heat-insulating materials. The connection mode between the controller and the terminal is electrical connection.

[0007] As a preferred solution of the present invention, the fixed sleeve, the piston plate, and the vibrating rod are all made of aluminum alloy. The vibrating rod penetrates through the fixed sleeve and extends outside the forming box. The connection modes of the return spring with the fixed sleeve and the servo motor with the forming box are both fixed connections.

[0008] As a preferred solution of the present invention, the push rod, the sliding seat, the connecting block, and the fixed block are all made of ABS plastic. The fixed block is designed in a semi-circular structure. Four groups of guide rollers, sliding seats, and fixed blocks are provided. The connection modes of the guide rollers, the driving gears with the forming box are all rotational connections.

[0009] As a preferred solution of the present invention, the sliding rack is designed in a rectangular structure. Multiple groups of fixed sleeves, piston plates, push rods, and return springs are provided. The push rod penetrates through the fixed sleeve and extends into the forming box. The connection modes of the push rod and the vibrating rod with the fixed sleeve are both sliding connections.

[0010] As a preferred solution of the present invention, the protective pad is made of silica gel. Two types of driving gears and servo motors are provided. The connection mode between the servo motor and the controller is electrical connection. The connecting block is designed in a convex-shaped structure.

[0011] As a preferred solution of the present invention, the lifting frame, the guide rod, and the clamping block are all made of stainless steel. Multiple groups of guide rods, towing ropes, clamping blocks, and electric push rods are provided. The towing rope penetrates through and extends outside the guide rod.

[0012] As a preferred solution of the present invention, the towing rope is made of steel wire rope. The clamping block penetrates through and extends outside the lifting frame. The connection mode between the winding shaft and the forming box is rotational connection. The connection modes of the winding motor and the electric push rod with the controller are both electrical connections.

[0013] As a preferred solution of the present invention, the clamping block is designed in a T-shaped structure. The connection mode between the electric push rod and the lifting frame is fixed connection.

[0014] Compared with the prior art, the beneficial effects of the present invention are: 1. In the present invention, by designing a concrete forming device for construction and civil engineering, the vibrating mechanism in the device is used to vibrate the concrete mold. The concrete mold is placed in the forming box. The controller starts the servo motor, and the servo motor drives the sliding rack to slide through the driving gear. The sliding rack drives the sliding seat and the fixed block to move in the forming box through the connecting block. When the sliding seat moves to the position of the fixed sleeve, the fixed block on the outer wall of the sliding seat will squeeze the push rod. The squeezed push rod drives the vibrating rod to move outwards through the piston plate. The vibrating rod moving outwards will hit the forming mold body. After the sliding seat moves away from the fixed sleeve, the fixed block no longer squeezes the push rod, and the return spring drives the piston plate and the vibrating rod to move inwards, and the vibrating rod returns to its original position. The sliding rack drives the sliding seat and the fixed block to move towards the next group of fixed sleeves. The sliding rack drives the four sliding seats to continuously move in the forming box. The fixed blocks in the four sliding seats drive the vibrating rods to hit the concrete mold outwards simultaneously through the push rods, and the concrete mold can be vibrated in multiple directions at the same time, and the vibrating effect is better, solving the problem that the vibrating mechanism set in the existing concrete forming device can only knock on a single position of the concrete mold, and the vibrating effect is poor.

[0015] 2. In the present invention, by designing a concrete forming device for construction and civil engineering, the lifting mechanism in the device is used to push out the concrete mold. After vibration, the controller starts the winding motor, and the winding motor drives the winding shaft to rotate. The rotating winding shaft will retract the traction rope, and the retracted traction rope will pull the lifting frame to move upwards. The lifting frame moving upwards will drive the concrete forming mold to rise, so as to push out the concrete forming mold from the forming box, and the operation of taking out the concrete forming mold is relatively convenient, solving the problem that the existing forming device is not convenient to take out the concrete forming mold.

[0016] 3. In the present invention, by designing a concrete forming device for construction and civil engineering, the clamping block in the device is used to limit the concrete forming mold to prevent the concrete forming mold from sliding during the vibration process and affecting the vibration effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is a schematic three-dimensional structure diagram of the present invention; Figure 2 is a partial front cross-sectional view at the fixed sleeve of the present invention; Figure 3 is a partial front cross-sectional view at the guide rod of the present invention; Figure 4 is of the present invention Figure 2 the enlarged view at A in; Figure 5 is of the present invention Figure 3 the enlarged view at B in; Figure 6This is the top view cross-sectional diagram of the sliding rack of the present invention.

[0018] In the figure: 1, forming box; 2, vibrating mechanism; 3, lifting mechanism; 4, box cover; 5, controller; 6, terminal; 201, fixed sleeve; 202, piston plate; 203, return spring; 204, vibrating rod; 205, push rod; 206, sliding seat; 207, connecting block; 208, sliding rack; 209, driving gear; 210, servo motor; 211, guide roller; 212, fixed block; 213, protective pad; 301, lifting frame; 302, guide rod; 303, towing rope; 304, winding shaft; 305, winding motor; 306, clamping block; 307, electric push rod. Specific embodiments

[0019] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0020] For the convenience of understanding the present invention, the present invention will be described more comprehensively below with reference to the relevant drawings. Several embodiments of the present invention are given. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present invention more thorough and comprehensive.

[0021] It should be noted that when an element is referred to as being "fixed to" another element, it can be directly on the other element or there can also be an intermediate element. When an element is considered to be "connected" to another element, it can be directly connected to the other element or there may be an intermediate element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are only for the purpose of illustration.

[0022] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those of ordinary skill in the technical field to which the present invention belongs. The terms used in the description of the present invention herein are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more of the related listed items.

[0023] Embodiment, please refer to Figures 1-6 This invention provides a technical solution: A concrete forming device for building and civil engineering, comprising a forming box 1, an internal vibration mechanism 2 is arranged inside the forming box 1, a lifting mechanism 3 is arranged on the inner wall of the forming box 1, a box cover 4 is installed on the top of the forming box 1 through a buckle, a controller 5 is fixedly connected to the outer wall of the forming box 1, and a terminal block 6 is installed on the outer wall of the forming box 1; Both the forming box 1 and the box cover 4 are made of heat-insulating materials, and the connection mode between the controller 5 and the terminal block 6 is electrical connection; In this embodiment, refer to Figure 2 、 Figure 4 And Figure 6 The vibration mechanism 2 includes a fixed sleeve 201 fixedly connected inside the forming box 1. A piston plate 202 is slidably connected inside the fixed sleeve 201. A return spring 203 is fixedly connected to the outer wall of the piston plate 202 and inside the fixed sleeve 201. A vibration rod 204 is fixedly connected to the outer wall of the piston plate 202 on the side away from the return spring 203. A push rod 205 is fixedly connected to the outer wall of the piston plate 202 at a position close to the return spring 203. A sliding seat 206 is slidably connected inside the forming box 1 at a position close to the fixed sleeve 201. Connecting blocks 207 are fixedly connected to both the top and bottom of the sliding seat 206. Sliding racks 208 are fixedly connected to the outer walls of the connecting blocks 207 at positions away from the sliding seat 206. A driving gear 209 is meshed with the outer walls of the sliding racks 208 inside the forming box 1. A servo motor 210 is fixedly connected to the top of the driving gear 209. Guide rollers 211 are slidably connected to the outer walls of the sliding racks 208 at the inner corners of the forming box 1. A fixed block 212 is fixedly connected to the outer wall of the sliding seat 206 at a position close to the fixed sleeve 201. A protective pad 213 is fixedly connected to the outer wall of the vibration rod 204 and outside the fixed sleeve 201; Among them, the fixed sleeve 201, the piston plate 202, and the vibrating rod 204 are all made of aluminum alloy. The vibrating rod 204 penetrates through the fixed sleeve 201 and extends outside the forming box 1. The connection methods of the return spring 203 with the fixed sleeve 201 and the servo motor 210 with the forming box 1 are both fixed connections. The push rod 205, the sliding seat 206, the connecting block 207, and the fixed block 212 are all made of ABS plastic. The fixed block 212 is designed with a semi-circular structure. Four groups of guide rollers 211, sliding seats 206, and fixed blocks 212 are provided. The connection methods of the guide rollers 211, the driving gear 209 with the forming box 1 are both rotational connections. The sliding rack 208 is designed with a rectangular structure. Multiple groups of fixed sleeves 201, piston plates 202, push rods 205, and return springs 203 are provided. The push rod 205 penetrates through the fixed sleeve 201 and extends into the forming box 1. The connection methods of the push rod 205 and the vibrating rod 204 with the fixed sleeve 201 are both sliding connections. The protective pad 213 is made of silica gel. Two types of driving gears 209 and servo motors 210 are provided. The connection method of the servo motor 210 with the controller 5 is an electrical connection. The connecting block 207 is designed with a convex structure. The lid 4 is reinstalled on the top of the forming box 1. The controller 5 starts the servo motor 210. The servo motor 210 drives the sliding rack 208 to slide through the driving gear 209. The sliding sliding rack 208 drives the sliding seat 206 and the fixed block 212 to move inside the forming box 1 through the connecting block 207. When the sliding seat 206 moves to the position of the fixed sleeve 201, the fixed block 212 on the outer wall of the sliding seat 206 will squeeze the push rod 205. The squeezed push rod 205 drives the vibrating rod 204 to move outward through the piston plate 202. The outward-moving vibrating rod 204 will impact the forming die body. After the sliding seat 206 moves away from the fixed sleeve 201, the fixed block 212 no longer squeezes the push rod 205. The return spring 203 drives the piston plate 202 and the vibrating rod 204 to move inward, and the vibrating rod 204 returns to its original position. The sliding rack 208 drives the sliding seat 206 and the fixed block 212 to continue moving to the position of the next group of fixed sleeves 201. The sliding rack 208 drives the four groups of sliding seats 206 to continuously move inside the forming box 1. The fixed blocks 212 in the continuously moving four groups of sliding seats 206 drive the vibrating rod 204 to simultaneously impact the concrete die outward through the push rod 205, thereby continuously vibrating the concrete die; In this embodiment, referring to Figure 3 and Figure 5, the lifting mechanism 3 includes a lifting frame 301 fixedly connected to the bottom of the forming box 1. A guide rod 302 is slidably connected inside the lifting frame 301. A towing rope 303 is slidably connected inside the guide rod 302 at a position corresponding to the lifting frame 301. A winding shaft 304 is fixedly connected to the outer wall of the towing rope 303 inside the forming box 1. A winding motor 305 is fixedly connected to the outer wall of the winding shaft 304. A clamping block 306 is slidably connected to the outer wall of the lifting frame 301. An electric push rod 307 is fixedly connected to the outer wall of the clamping block 306 inside the lifting frame 301; Among them, the lifting frame 301, the guide rod 302 and the clamping block 306 are all made of stainless steel. Multiple groups of the guide rod 302, the towing rope 303, the clamping block 306 and the electric push rod 307 are provided. The towing rope 303 penetrates and extends outside the guide rod 302. The towing rope 303 is made of steel wire rope. The clamping block 306 penetrates and extends outside the lifting frame 301. The connection mode between the winding shaft 304 and the forming box 1 is rotatable connection. The connection modes of the winding motor 305 and the electric push rod 307 with the controller 5 are both electrically connected. The clamping block 306 is designed in a T-shaped structure. The connection mode between the electric push rod 307 and the lifting frame 301 is fixedly connected. Remove the box cover 4 and place the concrete forming mold into the forming box 1. The concrete forming mold will fall onto the top of the lifting frame 301. The controller 5 starts the electric push rod 307. The electric push rod 307 will push the clamping block 306 to move. The moving clamping block 306 will approach and closely adhere to the concrete forming mold. The clamping block 306 clamps the concrete forming mold. After vibration is completed, the controller 5 turns off the servo motor 210, and the vibration rod 204 no longer impacts the concrete forming mold. Remove the box cover 4. The controller 5 starts the winding motor 305. The winding motor 305 drives the winding shaft 304 to rotate. The rotating winding shaft 304 will retract the towing rope 303. The retracted towing rope 303 will pull the lifting frame 301 to move upward. The upward moving lifting frame 301 will drive the concrete forming mold to rise. The concrete forming mold is pushed out of the forming box. The electric push rod 307 drives the clamping block 306 to move in the reverse direction. The reversely moving clamping block 306 no longer resists the concrete forming mold. Remove the concrete forming mold from the lifting frame 301. The winding motor 305 drives the winding shaft 304 to rotate in the reverse direction. The reversely rotating winding shaft 304 releases the towing rope 303. The towing rope 303 no longer pulls the lifting frame 301. The lifting frame 301 slides down along the guide rod 302 into the forming box 1.

[0024] The working process of the present invention: When using the concrete forming device for building and civil engineering designed by this solution, remove the box cover 4 and place the concrete forming mold into the forming box 1. The concrete forming mold will fall onto the top of the lifting frame 301. The controller 5 starts the electric push rod 307. The electric push rod 307 will push the clamping block 306 to move. The moving clamping block 306 will approach and closely adhere to the concrete forming mold. The clamping block 306 clamps the concrete forming mold; Reinstall the box cover 4 on the top of the forming box 1. The controller 5 starts the servo motor 210. The servo motor 210 drives the sliding rack 208 to slide through the driving gear 209. The sliding sliding rack 208 drives the sliding seat 206 and the fixed block 212 to move in the forming box 1 through the connecting block 207. When the sliding seat 206 moves to the position of the fixed sleeve 201, the fixed block 212 on the outer wall of the sliding seat 206 will squeeze the push rod 205. The squeezed push rod 205 drives the vibrating rod 204 to move outwards through the piston plate 202. The vibrating rod 204 moving outwards will impact the forming die body. After the sliding seat 206 moves away from the fixed sleeve 201, the fixed block 212 no longer squeezes the push rod 205. The return spring 203 drives the piston plate 202 and the vibrating rod 204 to move inwards, and the vibrating rod 204 returns to its original position. The sliding rack 208 drives the sliding seat 206 and the fixed block 212 to continue moving to the position of the next group of fixed sleeves 201. The sliding rack 208 drives the four sliding seats 206 to continuously move in the forming box 1. The fixed blocks 212 in the four continuously moving sliding seats 206 drive the vibrating rods 204 to simultaneously impact the concrete mold outwards through the push rods 205, thereby continuously vibrating the concrete mold; After the vibration is completed, the controller 5 turns off the servo motor 210. The vibrating rod 204 no longer impacts the concrete forming mold. Remove the box cover 4. The controller 5 starts the winding motor 305. The winding motor 305 drives the winding shaft 304 to rotate. The rotating winding shaft 304 will retract the traction rope 303. The retracted traction rope 303 will pull the lifting frame 301 to move upwards. The lifting frame 301 moving upwards will drive the concrete forming mold to rise. The concrete forming mold is pushed out of the forming box. The electric push rod 307 drives the block 306 to move in the reverse direction. The reversely moving block 306 no longer abuts against the concrete forming mold. Remove the concrete forming mold from the lifting frame 301. The winding motor 305 drives the winding shaft 304 to rotate in the reverse direction. The reversely rotating winding shaft 304 releases the traction rope 303. The traction rope 303 no longer pulls the lifting frame 301, and the lifting frame 301 slides down along the guide rod 302 into the forming box 1.

[0025] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A concrete forming device for construction and civil engineering, comprising a forming box (1), characterized in that: A vibrating mechanism (2) is provided inside the molding box (1), a lifting mechanism (3) is provided on the inner wall of the molding box (1), a box cover (4) is installed on the top of the molding box (1) via a lock, a controller (5) is fixedly connected to the outer wall of the molding box (1), and a terminal post (6) is installed on the outer wall of the molding box (1); The vibrating mechanism (2) comprises a fixed sleeve (201) fixedly connected to the inside of the molding box (1); a piston plate (202) is slidably connected to the inside of the fixed sleeve (201); a return spring (203) is fixedly connected to the outer wall of the piston plate (202) and inside the fixed sleeve (201); a vibrating rod (204) is fixedly connected to the outer wall of the piston plate (202) and at a side away from the return spring (203); a push rod (205) is fixedly connected to the outer wall of the piston plate (202) and at a position close to the return spring (203); a sliding seat (206) is slidably connected to the inside of the molding box (1) and at a position close to the fixed sleeve (201); the top and bottom of the sliding seat (206) are fixedly connected. A connecting block (207) is fixedly connected, a sliding rack (208) is fixedly connected to the outer wall of the connecting block (207) and at a position away from the sliding seat (206), a driving gear (209) is meshingly connected to the outer wall of the sliding rack (208) and inside the molding box (1), a servo motor (210) is fixedly connected to the top of the driving gear (209), a guide roller (211) is slidably connected to the outer wall of the sliding rack (208) and at an inner corner of the molding box (1), a fixing block (212) is fixedly connected to the outer wall of the sliding seat (206) and at a position close to the fixing sleeve (201), and a protective pad (213) is fixedly connected to the outer wall of the vibrating rod (204) and outside the fixing sleeve (201); The lifting mechanism (3) comprises a lifting frame (301) fixedly connected to the bottom of the molding box (1); a guide rod (302) is slidably connected to the interior of the lifting frame (301); a traction rope (303) is slidably connected to the interior of the guide rod (302) and at a corresponding position of the lifting frame (301); a winding shaft (304) is fixedly connected to the outer wall of the traction rope (303) and inside the molding box (1); a winding motor (305) is fixedly connected to the outer wall of the winding shaft (304); a clamping block (306) is slidably connected to the outer wall of the lifting frame (301); and an electric push rod (307) is fixedly connected to the outer wall of the clamping block (306) and inside the lifting frame (301); The molding box (1) and the box cover (4) are both made of thermal insulation materials, and the controller (5) is connected to the terminal (6) in an electrical manner.

2. A concrete forming device for construction and civil engineering according to claim 1, characterized in that: The fixed sleeve (201), the piston plate (202), and the vibrating rod (204) are all made of aluminum alloy; the vibrating rod (204) penetrates the fixed sleeve (201) and extends outside the molding box (1); the return spring (203) and the fixed sleeve (201), and the servo motor (210) and the molding box (1) are all connected in a fixed manner.

3. A concrete forming device for construction and civil engineering according to claim 1, characterized in that: The push rod (205), the sliding seat (206), the connecting block (207) and the fixing block (212) are all made of ABS plastic; the fixing block (212) is designed as a semicircular structure; four groups of the guide rollers (211), the sliding seat (206) and the fixing block (212) are provided; and the guide rollers (211), the driving gear (209) and the molding box (1) are connected in a rotational manner.

4. A concrete forming device for construction and civil engineering according to claim 1, characterized in that: The sliding rack (208) is of rectangular structure design. The fixed sleeve (201), the piston plate (202), the push rod (205) and the return spring (203) are all provided in multiple groups. The push rod (205) passes through the fixed sleeve (201) and extends into the molding box (1). The push rod (205), the vibrating rod (204) and the fixed sleeve (201) are all connected in a sliding manner.

5. A concrete forming device for construction and civil engineering according to claim 1, characterized in that: The protection pad (213) is made of silicone, the driving gear (209) and the servo motor (210) are both provided with two types, the servo motor (210) is connected to the controller (5) in an electrical manner, and the connection block (207) is designed in a convex shape.

6. A concrete forming device for construction and civil engineering according to claim 1, characterized in that: The lifting frame (301), the guide rod (302) and the clamping block (306) are all made of stainless steel. The guide rod (302), the traction rope (303), the clamping block (306) and the electric push rod (307) are all provided in multiple groups. The traction rope (303) passes through and extends outside the guide rod (302).

7. A concrete forming device for construction and civil engineering according to claim 1, characterized in that: The traction rope (303) is made of a steel wire rope, the clamping block (306) passes through and extends outside the lifting frame (301), the winding shaft (304) is connected to the forming box (1) in a rotational manner, and the winding motor (305), the electric push rod (307) and the controller (5) are all connected in an electrical manner.

8. A concrete forming device for construction and civil engineering according to claim 1, characterized in that: The clamping block (306) is designed as a T-shaped structure, and the electric push rod (307) is connected to the lifting frame (301) in a fixed connection.

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