Concrete member curing and transferring device

Abstract

The utility model discloses a concrete member curing and transferring device, which relates to the technical field of railways and comprises a transferring track arranged in a foundation pit, a transferring trolley arranged on the transferring track and a bearing track arranged in a steam curing chamber. The transfer trolley comprises a lower trolley body, an upper trolley body, a transverse moving rail and a lifting table. The transverse moving rail is arranged on the top face of the lower trolley body and is perpendicular to the transfer rail. A bearing track is mounted in the steam curing chamber; the transverse moving track can be selectively aligned with the bearing track. The transfer trolley bears the concrete member to move on the transfer track, so that short-distance transportation from the production workshop to the steam curing chamber is realized; the upper vehicle body can bear concrete members to selectively drive into the steam-curing chamber and place the concrete members on the supporting cross beams, so that transverse feeding is realized; and after curing is completed, the upper vehicle body drives into the steam curing chamber in a no-load mode, then the lifting table jacks and replaces the supporting cross beam to support the concrete member, then the lifting table bears the concrete member and moves out of the steam curing chamber, and transverse discharging is achieved.

Description

TECHNICAL FIELD

[0001] The utility model relates to railway technical field, concretely relates to a concrete member maintenance transfer device. BACKGROUND

[0002] The commonly used concrete members in railway engineering are track slab, floating slab and sleeper.

[0003] The track slab and floating slab are both plate-shaped. The single sleeper is strip-shaped, but the sleepers are usually arranged in a transverse direction along the width direction to form a sleeper group (connected with each other by the adhesive force between the concrete and the mold) in a plate shape, so as to facilitate batch production and transfer. That is, the track slab, floating slab and sleeper group are all plate-shaped.

[0004] The track slab, floating slab and sleeper group need to be cured in a steam curing chamber to accelerate the hardening of the concrete. The steam curing chamber needs to be kept warm and humid, that is, it needs to be in an environment with low air flow, so it is usually set far away from the wide production workshop.

[0005] The steam curing chamber is usually opened laterally, so the overhead crane (such as a roof trolley) cannot directly transfer the track slab / floating slab / sleeper group into the steam curing chamber. The traditional forklift cannot support and lift the track slab / floating slab / sleeper group with large transverse length and width due to the short insertion arm, so a technical solution is needed to realize transfer and transverse feeding and discharging. SUMMARY

[0006] In order to meet the technical requirements in the background art about "realizing transfer and transverse feeding and discharging of concrete members", the utility model provides a concrete member maintenance transfer device.

[0007] The technical solution adopted by the utility model to solve the above technical problems is:

[0008] A concrete member maintenance transfer device, comprising a transfer track arranged in a foundation pit, a transfer trolley arranged on the transfer track, and a receiving track arranged in a steam curing chamber; the transfer trolley comprises a lower trolley body, an upper trolley body, a transverse moving track and a lifting platform; the transverse moving track is arranged on the top surface of the lower trolley body, and the transverse moving track is arranged vertically to the transfer track; the bottom surface of the lower trolley body is provided with a first trolley wheel, and the first trolley wheel is pressed on the transfer track; the bottom surface of the upper trolley body is provided with a second trolley wheel, and the second trolley wheel is pressed on the transverse moving track; the steam curing chamber is provided with a plurality of receiving tracks arranged along the length direction of the transfer track; the height of the transverse moving track is equal to that of the receiving track, and the transverse moving track can be selectively aligned with the receiving track.

[0009] As a further optimization of this utility model, a support beam for supporting concrete components is installed in the steam curing chamber.

[0010] As a further optimization of this utility model, each steam curing chamber is provided with two parallel support beams, which are perpendicular to the transfer track; a connection gap is provided between the two support beams in the same steam curing chamber to accommodate the upper vehicle body and the lifting platform.

[0011] As a further optimization of this utility model, the steam curing chamber includes a frame structure and a heat-insulating film covering the top and sides of the frame structure.

[0012] As a further optimization of this utility model, the frame structure includes several vertical support rods, several horizontal support rods, and several top support rods; the tops of adjacent vertical support rods are connected by several horizontal support rods, and the ends of adjacent horizontal support rods are connected by several top support rods.

[0013] As a further optimization of this utility model, the upright support rod is placed between the adjacent support beams in the adjacent steam curing chambers, and the tops of the adjacent support beams in the adjacent steam curing chambers are connected by a reinforcing link. The reinforcing link is placed horizontally and fixedly connected to the upright support rod in a cross shape.

[0014] As a further optimization of this utility model, the upper body is provided with a receiving groove with an opening on the top surface, and the lifting platform is installed in the receiving groove.

[0015] As a further optimization of this utility model, the lifting platform includes a cover, a lifting frame, and a hydraulic cylinder; the hydraulic cylinder is placed upright in the inner cavity of the receiving groove, the lifting frame is disposed at the top of the hydraulic cylinder, and the cover is pressed against the top surface of the lifting frame and fixedly connected.

[0016] As a further optimization of this utility model, the lifting frame includes a plurality of first rods and a plurality of second rods connected in a grid pattern; the first rods and the second rods are arranged perpendicular to each other; the top surfaces of the first rods and the second rods are coplanar; the second rods include alternating straight rod portions and bent portions, and the first rods are engaged in the bent portions.

[0017] As a further optimization of this utility model, the bending part includes an extended sidewall with its top end inclined outwards, and the first rod body has an inclined surface that adapts to and fits the extended sidewall; the inclined surface has a first threaded hole in the shape of a blind hole, and the extended sidewall has a second threaded hole in the shape of a through hole, the first threaded hole and the second threaded hole are coaxially arranged and interconnected; the base of the hydraulic cylinder is connected to the bottom surface of the inner cavity of the receiving groove, and a sleeve is sleeved and fixedly connected to the output shaft of the hydraulic cylinder, the middle part of the sleeve is inserted into the second threaded hole, and the top part is inserted into the first threaded hole; the outer sidewall of the sleeve has an external thread that adapts to and engages with the first threaded hole and the second threaded hole.

[0018] In summary, this utility model has at least one of the following advantages:

[0019] (1) The present invention has a simple structure and reliable function. The transfer vehicle carries concrete components and moves them on the transfer track to realize short-distance transportation from the production workshop to the curing chamber. The upper vehicle can selectively drive the concrete components into the curing chamber and place the concrete components on the supporting beam, thereby realizing horizontal feeding. After curing, the upper vehicle enters the curing chamber empty, and then the lifting platform is lifted and takes over the support beam to support the concrete components. Then the lifting platform carries the concrete components and moves them out of the curing chamber, thus realizing horizontal unloading.

[0020] (2) The support rod is placed between the adjacent support beams in the adjacent steam curing chambers. The tops of the adjacent support beams in the adjacent steam curing chambers are connected by a reinforcing rod. The reinforcing rod is placed horizontally and fixedly connected to the support rod in a cross shape, so that the adjacent support beams and the support rod are connected into a whole, thereby improving the stability and load-bearing capacity of the support beams and preventing the support beams from tilting and causing the concrete components to slip and fall.

[0021] (3) The hydraulic cylinder transmits the support force to the lifting frame through the sleeve. The support force of the sleeve is transmitted to the cover through the thread of the first screw hole and the first rod body in one direction, and through the thread of the second screw hole and the extension side wall in the other direction to the straight rod and the cover. The extension side wall supports the straight rod in the form of diagonal bracing (i.e. bearing pressure), so that the support force is distributed more evenly. Attached Figure Description

[0022] The present application will be further explained below with reference to the accompanying drawings:

[0023] Figure 1 This is a top view of the overall structure of this utility model;

[0024] Figure 2 This is a front view structural diagram of the present invention.

[0025] Figure 3A schematic diagram of the left-hand structure of the upper body entering the curing chamber;

[0026] Figure 4 A schematic diagram of the connection structure between the support rod and the supporting beam;

[0027] Figure 5 This is a structural diagram of the frame structure;

[0028] Figure 6 This is a front view schematic diagram of the vertical section structure of the upper body and the lifting platform;

[0029] Figure 7 This is a schematic diagram of the lifting frame structure;

[0030] Figure 8 This is a schematic diagram of the structure of the first and second rods;

[0031] Figure 9 This is a schematic diagram of the connection structure between the sleeve, the first rod, and the second rod.

[0032] Explanation of reference numerals in the attached figures:

[0033] In the picture,

[0034] 1. Transfer track;

[0035] 2. Transfer vehicle; 21. Lower body; 22. Upper body; 221. Receiving slot; 23. Transverse track; 24. Lifting platform; 241. Hydraulic cylinder; 2411. Sleeve; 242. Lifting frame; 2421. First rod; 24211. Inclined surface; 24212. First screw hole; 2422. Second rod; 24221. Straight rod section; 24222. Bending section; 24223. Extended side wall; 24224. Second screw hole; 243. Cover;

[0036] 3. Accepting track;

[0037] 4. Foundation pit;

[0038] 5. Steam curing chamber; 51. Support beam; 510. Plug-in gap; 52. Support leg; 53. Reinforcing connecting rod; 54. Vertical support rod; 55. Horizontal support rod; 56. Top support rod;

[0039] 6. Concrete components. Detailed Implementation

[0040] Based on the above-described structural features of this application, the implementation methods of this application will be further described as follows:

[0041] Reference Figures 1-2This embodiment provides a concrete component curing and transfer device, including a transfer track 1 set in the foundation pit 4, a transfer vehicle 2 set on the transfer track 1, and a receiving track 3 set in the steam curing chamber 5. The transfer vehicle 2 can carry track slabs / floating slabs / sleeper assemblies to move along the transfer track 1, and then selectively place the track slabs / floating slabs / sleeper assemblies into the steam curing chamber 5 for steam curing.

[0042] Reference Figure 1 and Figure 2 The transfer vehicle 2 includes a lower body 21, an upper body 22, a transverse track 23, and a lifting platform 24. The transverse track 23 is located on the top surface of the lower body 21 (e.g., fixed by bolts) and is perpendicular to the transfer track 1. A first wheel is mounted on the bottom surface of the lower body 21 and is pressed and engaged with the transfer track 1. A first motor for driving the first wheel is fixedly mounted inside the lower body 21 by bolts, and the first motor is connected to the first wheel via a gear set and a reducer. A second wheel is mounted on the bottom surface of the upper body 22 and is pressed and engaged with the transverse track 23. A second motor for driving the second wheel is mounted inside the upper body 22, and the second motor is connected to the second wheel via a gear set and a reducer. The gear set and reducer are conventional existing technologies in the industry, and their specific structures will not be described in detail. The first motor drives the transfer vehicle 2 and the concrete components 6 (track slab / floating slab / sleeper assembly) placed on the transfer vehicle 2 to move along the transfer track 1.

[0043] Reference Figures 1-2 Several curing chambers 5 are arranged along the length of the transfer track 1. Each curing chamber 5 is equipped with a receiving track 3, which is perpendicular to the transfer track 1. The transverse track 23 is at the same height as the receiving track 3 and can be selectively aligned with the receiving track 3. The second motor drives the upper car body 22, the lifting platform 24, and the concrete components 6 (track slab / floating slab / sleeper assembly) placed on the lifting platform 24 to move along the transverse track 23 or the receiving track 3.

[0044] Reference Figures 1-3 The steam curing chamber 5 is set on the ground (e.g., fixedly connected by bolts), and the receiving rail 3 is fixedly installed on the ground (e.g., fixedly connected by bolts). The pit 4 is excavated downward with the ground as the reference, and the transfer rail 1 is fixedly installed on the bottom surface of the pit 4 (e.g., fixedly connected by bolts). Therefore, the bottom surface of the pit 4 and the ground form a height difference, so that the transverse rail 23 and the receiving rail 3 are at the same height, so that the upper vehicle 22 can smoothly drive into or out of the steam curing chamber 5.

[0045] Reference Figures 1-3The curing chamber 5 is equipped with a support beam 51 for supporting the concrete components 6 (track slab / floating slab / sleeper assembly). Each curing chamber 5 has two parallel support beams 51, which are perpendicular to the transfer track 1. There is an insertion gap 510 between the two support beams 51 in the same curing chamber 5 to accommodate the upper car body 22 and the lifting platform 24.

[0046] Reference Figure 3 and Figure 4 Two supporting beams 51 are respectively located on the inner side wall of the curing chamber 5; the supporting beams 51 are connected to the ground via legs 52. The top of the legs 52 is fixedly connected to the supporting beams 51 (e.g., by bolts or by welding), and the bottom of the legs 52 is fixedly connected to the ground (e.g., by bolts or by pre-embedded concrete).

[0047] The steam curing chamber 5 includes a frame structure and an insulating film covering the top and sides of the frame structure. The insulating film, such as a plastic film, is used to reduce airflow between the steam curing chamber 5 and the outside environment, thereby maintaining temperature and humidity.

[0048] Reference Figure 4 and Figure 5 The frame structure includes several upright support members 54, several horizontal support members 55, and several top support members 56. The bottom ends of the upright support members 54 are fixedly connected to the ground (e.g., by bolts or by pre-embedded concrete). The tops of adjacent upright support members 54 are connected by several horizontal support members 55, and the ends of adjacent horizontal support members 55 are connected by several top support members 56. The two ends of each horizontal support member 55 are fixedly connected to the upright support members 54 by bolts or by welding; the two ends of each top support member 56 are fixedly connected to the horizontal support members 55 by bolts or by welding. Since there are several upright support members 54, horizontal support members 55, and top support members 56, several curing chambers 5 are formed inside.

[0049] Reference Figure 4 and Figure 5 The upright support rod 54 is placed between adjacent support beams 51 in adjacent curing chambers 5. The top ends of adjacent support beams 51 in adjacent curing chambers 5 are connected by reinforcing rods 53. The two ends of the reinforcing rods 53 are vertically fixed to the support beams 51 (e.g., by bolts or by welding). The reinforcing rods 53 are placed horizontally and fixed to the upright support rod 54 in a cross shape (e.g., by bolts). This connects the adjacent support beams 51 and the upright support rod 54 into a whole, thereby improving the stability and load-bearing capacity of the support beams 51 and preventing the support beams 51 from tilting and causing the concrete components 6 (track slab / floating slab / sleeper assembly) to slip and fall and be damaged.

[0050] ReferenceFigure 2 and Figure 6 The upper body 22 is provided with a receiving groove 221 with an opening on the top surface. The lifting platform 24 is installed in the receiving groove 221 and can move longitudinally to lift or lower the concrete component 6 (track slab / floating slab / sleeper assembly).

[0051] Reference Figure 2 and Figure 6 The lifting platform 24 includes a housing 243, a lifting frame 242, and a hydraulic cylinder 241. The housing 243 is a rectangular shell structure with an open bottom. The hydraulic cylinder 241 is placed upright inside the receiving groove 221, and the lifting frame 242 is located on top of the hydraulic cylinder 241. The housing 243 is pressed against the top surface of the lifting frame 242 and fixedly connected. The hydraulic cylinder 241 drives the housing 243 to rise or fall. The lifting frame 242 is used to distribute the pressure between the hydraulic cylinder 241 and the housing 243, preventing pressure concentration from causing the housing 243 to bulge and deform; it also prevents the housing 243 from sinking under the pressure of the concrete component 6 in locations where the hydraulic cylinder 241 is not supported.

[0052] Reference Figures 6-8 The lifting frame 242 includes a plurality of first rods 2421 and a plurality of second rods 2422 connected in a grid pattern; the first rods 2421 and the second rods 2422 are arranged perpendicularly to each other; the top surfaces of the first rods 2421 and the top surfaces of the second rods 2422 are coplanar, thereby ensuring uniform contact with the housing 243 and avoiding pressure concentration. The second rods 2422 include alternating straight rod portions 24221 and bent portions 24222, with the first rods 2421 engaging within the bent portions 24222 to allow for clearance. The straight rod portions 24221 and the bent portions 24222 are integrally fixedly connected.

[0053] Reference Figures 8-9 The bending portion 24222 is U-shaped and includes an extended sidewall 24223 with its top end inclined outward. The first rod body 2421 is provided with an inclined surface 24211 that fits and conforms to the extended sidewall 24223. The inclined surface 24211 is provided with a first screw hole 24212 in the form of a blind hole, and the extended sidewall 24223 is provided with a second screw hole 24224 in the form of a through hole. The first screw hole 24212 and the second screw hole 24224 are coaxially arranged and interconnected.

[0054] Reference Figures 8-9The base of the hydraulic cylinder 241 is connected to the bottom surface of the inner cavity of the receiving groove 221 (e.g., by bolt fixing). A sleeve 2411 is sleeved and fixedly connected to the output shaft of the hydraulic cylinder 241 (e.g., by bolt fixing). The sleeve 2411 has a round tube structure with a closed top and an open bottom. The middle part of the sleeve 2411 is inserted into the second screw hole 24224, and the top part is inserted into the first screw hole 24212. The outer wall of the sleeve 2411 is provided with external threads that fit and engage with the first screw hole 24212 and the second screw hole 24224.

[0055] The assembly steps of this utility model are as follows: ① The first rod 2421 and the second rod 2422 are spliced ​​and positioned, and then the sleeve 2411 is screwed into the second screw hole 24224 and the first screw hole 24212 in sequence, until the top of the sleeve 2411 abuts against the deepest part of the first screw hole 24212; ② The hydraulic cylinder 241 is installed vertically in the receiving groove 221; ③ The lifting frame 242 is installed on the hydraulic cylinder 241, so that the output shaft of the hydraulic cylinder 241 is inserted into the sleeve 2411, and then the sleeve 2411 and the output shaft are fastened with radial bolts (during the process, the rectangular gap between the first rod 2421 and the second rod 2422 is used to provide space for the installer's arm); ④ The cover 243 is inserted into the receiving groove 221, so that the top surface of the inner cavity of the cover 243 is pressed against the top surface of the lifting frame 242, and then the cover 243 is fixedly connected to the top surface of the first rod 2421 / the top surface of the second rod 2422 with bolts.

[0056] Reference Figures 8-9 The hydraulic cylinder 241 transmits the support force to the lifting frame 242 through the sleeve 2411. The support force of the sleeve 2411 is transmitted to the cover 243 through the thread of the first screw hole 24212 via the first rod 2421, and in another direction through the thread of the second screw hole 24224 via the extension side wall 24223 to the straight rod 24221 and the cover 243. The extension side wall 24223 supports the straight rod 24221 in the form of diagonal bracing (i.e. bearing pressure), so that the support force is more evenly distributed. This avoids the problem in the traditional technology that the support can only be achieved within the upper projection range of the intersection of the first rod 2421 and the second rod 2422, and the non-intersection position of the first rod 2421 can only transmit force through its own bending resistance, which makes it easy to bend.

[0057] The steps for using this utility model are as follows: ① Control the transfer vehicle 2 to travel to the end of the transfer track 1, i.e., the end of the foundation pit 4; ② Use the roof trolley to place the concrete component 6 on the lifting platform 24; ③ The transfer vehicle 2 moves the concrete component 6 to be aligned with one of the curing chambers 5 and then stops moving (at this time, the transverse track 23 is aligned with the receiving track 3); ④ The lifting platform 24 rises until the height of the concrete component 6 is higher than the supporting beam 51; ⑤ The upper vehicle body 22 carries the concrete component 6 into the curing chamber 5 until the upper vehicle body 22 is inserted into the insertion gap 510 and the concrete component 6 is above the supporting beam 51; ⑥ The lifting platform 24 descends until the concrete component 6 is pressed against the supporting beam 51 and the lifting platform 24 separates from the concrete component 6; ⑦ The upper vehicle body 22 drives out of the curing chamber 5 and returns to the lower vehicle body 21; ⑧ The transfer vehicle 2 moves along the transfer track 1 to the end of the foundation pit 4 to transfer the next concrete component 6.

[0058] This utility model has a simple structure and reliable function. The transfer vehicle 2 carries the concrete component 6 and moves on the transfer track 1 to realize short-distance transportation from the production workshop to the curing chamber 5. The upper vehicle body 22 can selectively drive the concrete component 6 into the curing chamber 5 and place the concrete component 6 on the support beam 51, thereby realizing lateral loading. After curing, the upper vehicle body 22 drives into the curing chamber 5 empty, and then the lifting platform 24 takes over the support beam 51 to support the concrete component 6, and then carries the concrete component 6 and moves it out of the curing chamber 5, realizing lateral unloading.

[0059] In the description of this utility model, it should be noted that the terms "upper", "lower", "left", "right", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0060] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," and "connect" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or a connection through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0061] In conclusion, for those skilled in the art, any changes, modifications, substitutions, or variations made to this utility model based on its guidance, without departing from its principles and spirit, shall still fall within the protection scope of this utility model.

Claims

1. A concrete component curing and transfer device, characterized in that: It includes a transfer track (1) set in the foundation pit (4), a transfer vehicle (2) set on the transfer track (1), and a receiving track (3) set in the steam curing chamber (5). The transfer vehicle (2) includes a lower body (21), an upper body (22), a transverse track (23), and a lifting platform (24); the transverse track (23) is disposed on the top surface of the lower body (21) and is perpendicular to the transfer track (1); a first wheel is installed on the bottom surface of the lower body (21) and the first wheel presses against the transfer track (1); a second wheel is installed on the bottom surface of the upper body (22) and the second wheel presses against the transverse track (23); The steam curing chamber (5) is provided in several ways and is arranged along the length of the transfer track (1). Each steam curing chamber (5) is equipped with a receiving track (3). The transverse track (23) is at the same height as the receiving track (3), and the transverse track (23) can be selectively aligned with the receiving track (3).

2. The concrete component curing and transfer device according to claim 1, characterized in that: The curing chamber (5) is equipped with a support beam (51) for supporting the concrete components (6).

3. The concrete component curing and transfer device according to claim 2, characterized in that: Each of the steam curing chambers (5) is provided with two parallel support beams (51), which are perpendicular to the transfer track (1); the two support beams (51) in the same steam curing chamber (5) are provided with an insertion gap (510) for accommodating the upper vehicle body (22) and the lifting platform (24).

4. The concrete component curing and transfer device according to claim 3, characterized in that: The steam curing chamber (5) includes a frame structure and an insulation film covering the top and sides of the frame structure.

5. The concrete component curing and transfer device according to claim 4, characterized in that: The frame structure includes several vertical support rods (54), several horizontal support rods (55), and several top support rods (56); the tops of adjacent vertical support rods (54) are connected by several horizontal support rods (55), and the ends of adjacent horizontal support rods (55) are connected by several top support rods (56).

6. The concrete component curing and transfer device according to claim 5, characterized in that: The upright support rod (54) is placed between the adjacent support beams (51) in the adjacent steam curing chamber (5). The top ends of the adjacent support beams (51) in the adjacent steam curing chamber (5) are connected by a reinforcing link (53). The reinforcing link (53) is placed horizontally and fixedly connected to the upright support rod (54) in a cross shape.

7. The concrete component curing and transfer device according to claim 6, characterized in that: The upper body (22) is provided with a receiving groove (221) with an opening on the top surface, and the lifting platform (24) is installed in the receiving groove (221).

8. The concrete component curing and transfer device according to claim 7, characterized in that: The lifting platform (24) includes a cover (243), a lifting frame (242), and a hydraulic cylinder (241); the hydraulic cylinder (241) is placed upright in the cavity of the receiving groove (221), the lifting frame (242) is set at the top of the hydraulic cylinder (241), and the cover (243) is pressed against the top surface of the lifting frame (242) and fixedly connected.

9. The concrete component curing and transfer device according to claim 8, characterized in that: The lifting frame (242) includes a plurality of first rods (2421) and a plurality of second rods (2422) connected in a grid pattern; the first rods (2421) and the second rods (2422) are arranged perpendicular to each other; the top surfaces of the first rods (2421) and the second rods (2422) are coplanar; the second rods (2422) include alternating straight rod portions (24221) and bent portions (24222), and the first rods (2421) are engaged in the bent portions (24222).

10. The concrete component curing and transfer device according to claim 9, characterized in that: The bending portion (24222) includes an extended sidewall (24223) with its top end inclined outwards. The first rod (2421) has an inclined surface (24211) that adapts to and fits the extended sidewall (24223). The inclined surface (24211) has a first screw hole (24212) in the form of a blind hole, and the extended sidewall (24223) has a second screw hole (24224) in the form of a through hole. The first screw hole (24212) and the second screw hole (24224) are coaxially arranged and interconnected. The base of the hydraulic cylinder (241) is connected to the bottom surface of the inner cavity of the receiving groove (221). A sleeve (2411) is sleeved and fixedly connected to the output shaft of the hydraulic cylinder (241). The middle part of the sleeve (2411) is inserted into the second screw hole (24224), and the top part is inserted into the first screw hole (24212). The outer wall of the sleeve (2411) is provided with external threads that fit and engage with the first screw hole (24212) and the second screw hole (24224).

Images