Automatic snapping mechanism special for precast component hoisting machine

Abstract

The application discloses a kind of automatic occlusion mechanism special for precast component hoist machine, including the bottom plate being provided with installation shell and drive motor, installation shell is equipped with limit slot, limit slot extends along the drive shaft of drive motor axially, upper pressing block and lower pressing block are slidably connected in limit slot, the side of upper pressing block and lower pressing block opposite is respectively provided with upper chain tooth slot and lower chain tooth slot, the side of installation shell has passageway, the bottom plate is rotatably connected with transmission rod, the outer circumferential surface of transmission rod is respectively provided with first threaded portion and second threaded portion with opposite screw direction on both sides along length direction, transmission rod is respectively screwed through upper pressing block and lower pressing block by first threaded portion and second threaded portion, transmission rod and the drive shaft of drive motor are provided with transmission part.Between by adopting the above setting, realize and hoist robot traction mechanism's traction chain occlusion or loose function.Simultaneously apply the present application in hoist robot, can save production cost and improve work efficiency.

Description

Technical Field

[0001] This invention relates to the technical field of interlocking structures, and more specifically to an automatic interlocking mechanism for a precast component hoisting machine. Background Technology

[0002] Lifting robots are mainly used to lift beams to the top of adjacent concrete columns on the construction site. After a series of construction steps, the corresponding storage structure or bridge structure is formed. Because the construction of lifting beams is widely used in bridge construction, this type of lifting robot is sometimes referred to in the industry as a bridge crane.

[0003] The hoisting robot described in this invention is mainly used in construction, especially in warehouse structures, for hoisting beams atop multiple concrete columns. Existing hoisting robots primarily consist of a main boom slidably connected with a slewing mechanism, column base assemblies, and a lifting mechanism. The slewing mechanism, after moving along the main boom to a suitable position, can rotate its chassis to adjust the positions of its four legs to correspond with four adjacent concrete columns, facilitating support on the columns before proceeding to the next beam hoisting operation. Two column base assemblies are used, primarily moved to the ends of the main boom and supported on the concrete columns, allowing the slewing mechanism to move between them for effective support. The lifting mechanism, after moving along the main boom to a suitable position, uses its telescopic rope to lift the beam and move it to the appropriate location. Meanwhile, the slewing mechanism, column base assembly, and lifting mechanism of the hoisting robot are each equipped with a separate traction mechanism for their movement on the main boom. The traction mechanism uses traction ropes and pulley systems to move the corresponding components to the corresponding positions on the main boom. The traction ropes and the corresponding components are connected by fasteners or universal connectors to keep them in a relatively fixed state.

[0004] Furthermore, because there are many traction mechanisms in hoisting robots, and only one component can be pulled by one traction structure, it is impossible to simultaneously pull multiple components or pull a single component using the same traction structure. At the same time, the existing hoisting robot's main boom sliding slewing mechanism, column base assembly, and lifting mechanism do not have corresponding engagement mechanisms to achieve the function of engaging or disengaging with the traction rope (traction chain) of the traction mechanism. Therefore, the existing hoisting robot's structure of using multiple traction components to pull multiple components individually has the problems of high production cost and low flexibility of use. Summary of the Invention

[0005] In order to overcome the shortcomings of the prior art, the purpose of this invention is to provide an automatic engagement mechanism for a precast component hoisting machine, which can engage or disengage with the traction rope (traction chain) of the hoisting robot's traction mechanism.

[0006] The objective of this invention is achieved through the following technical solution:

[0007] An automatic engagement mechanism for a precast component hoisting machine includes a base plate with a mounting shell and a drive motor. The mounting shell has a limiting groove that extends axially along the drive shaft of the drive motor. An upper pressure block and a lower pressure block are slidably connected within the limiting groove. The upper and lower pressure blocks have upper chain tooth grooves and lower chain tooth grooves on their opposite sides, respectively. A channel is provided on the side of the mounting shell between the upper and lower pressure blocks. A transmission rod is rotatably connected to the base plate. The outer circumference of the transmission rod has a first threaded portion and a second threaded portion with opposite thread directions on both sides along its length. The transmission rod passes through the first threaded portion and the second threaded portion, respectively, threadedly through the upper and lower pressure blocks. A transmission component is provided between the transmission rod and the drive shaft of the drive motor.

[0008] Furthermore, the mounting shell includes two baffles connected to the base plate, the two baffles being spaced apart, and the gap between the two baffles forming the limiting groove. A bottom partition is provided on both sides of the limiting groove near the base plate, perpendicular to the line connecting the two baffles, forming a bottom sliding groove between the two bottom partitions; the lower pressing block is slidably connected to the bottom sliding groove. A top partition is provided on both sides of the limiting groove away from the base plate, perpendicular to the line connecting the two baffles, forming a top sliding groove between the two top partitions; the upper pressing block is slidably connected to the top sliding groove.

[0009] Furthermore, the drive shaft of the drive motor passes through the plane of the base plate, the transmission component includes a first gear that rotates coaxially with the drive shaft of the drive motor, and a second gear that rotates coaxially with the end of the transmission rod located on the base plate away from the mounting shell, the second gear meshing with the first gear.

[0010] Furthermore, the base plate is rotatably connected to a linkage rod, and the outer circumference of the linkage rod is provided with a third threaded portion and a fourth threaded portion with opposite thread directions on both sides along the length direction. The linkage rod passes through the upper pressure block and the lower pressure block respectively through the third threaded portion and the fourth threaded portion. The first threaded portion and the third threaded portion have opposite thread directions. The linkage rod is located at the end of the base plate away from the mounting shell and is coaxially rotated with a third gear. The third gear meshes with the second gear.

[0011] Furthermore, the top partition and the bottom partition are spaced apart, the channel is located at the spaced position between the top partition and the bottom partition, and also at the spaced position between the transmission rod and the linkage rod.

[0012] Furthermore, a laser detection sensor is provided on the side of the top partition plate. The sensing end of the laser detection sensor is aligned with the length direction of the transmission rod, and the sensing end of the laser detection sensor intersects with the extension direction of the channel. Photoelectric switches are provided at both ends of the second threaded portion of the transmission rod and the fourth threaded portion of the linkage rod along the length direction. The sensing ends of the photoelectric switches on the transmission rod and the linkage rod are directly opposite each other, and the sensing ends of the photoelectric switches on the transmission rod and the linkage rod near the channel are directly opposite the channel.

[0013] Furthermore, a top fixing strip is fixedly connected to the end face of the upper pressure block facing the lower pressure block. The top fixing strip is directly opposite the channel, and the length direction of the top fixing strip is perpendicular to the transmission rod. The upper chain tooth groove is formed on the end face of the top fixing strip away from the upper pressure block. A bottom fixing strip is fixedly connected to the end face of the lower pressure block facing the upper pressure block. The bottom fixing strip is directly opposite the top fixing strip, and the lower chain tooth groove is formed on the end face of the bottom fixing strip away from the lower pressure block.

[0014] Furthermore, the upper pressure block has two guide blocks fixedly connected to its end face facing the lower pressure block. The two guide blocks are distributed on both sides of the top fixing strip along a direction perpendicular to the length of the top fixing strip, and the channel is located between the two guide blocks.

[0015] Furthermore, the top partition has a through-hole on its side, and the bottom partition has a through-hole in the side, with the axis of the through-hole being aligned with the axis of the through-hole.

[0016] Furthermore, both the transmission rod and the linkage rod are coaxially rotated with anti-collision rings at their positions between the base plate and the second gear.

[0017] The present invention has the following beneficial effects:

[0018] An automatic engagement mechanism specifically designed for precast component hoisting machines aims to engage or disengage with the traction rope (traction chain) of a hoisting robot's traction mechanism. A channel is formed between the upper and lower pressure blocks by slidingly positioning them in the limiting groove of the mounting housing. This channel allows the chain to pass through. Driven by the motor, and through the transmission of the transmission components, the transmission rod rotates synchronously with the motor's drive shaft. The first and second threaded portions of the transmission rod rotate in opposite directions. Under the limiting action of the outer periphery of the limiting groove, the upper and lower pressure blocks can move in opposite directions. When the upper and lower pressure blocks move relative to each other, the upper chain tooth groove of the upper pressure block and the lower chain tooth groove of the lower pressure block respectively engage with the upper and lower chain tooth rail surfaces of the chain, thereby achieving the function of engaging the chain and realizing the synchronous movement of the automatic engagement mechanism and the chain. Conversely, when the upper and lower pressure blocks move in opposite directions, the engagement of the upper and lower pressure blocks with the chain can be released, thereby realizing the function of releasing the automatic engagement mechanism and moving synchronously with the chain. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of the hoisting robot.

[0020] Figure 2 This is a partial structural diagram of an automatic engagement mechanism applied to a lifting robot.

[0021] Figure 3 for Figure 2 A sectional view.

[0022] Figure 4 This is a schematic diagram of the overall structure of the present invention.

[0023] Figure 5 This is a schematic diagram of the overall structure of the present invention.

[0024] Figure 6 for Figure 4 Sectional view at point AA.

[0025] Figure 7 for Figure 6 A bottom sectional view along the B direction.

[0026] Figure 8 for Figure 6 One of the cross-sectional views in the CC direction.

[0027] Figure 9 for Figure 6 The second sectional view along the CC direction.

[0028] Figure 10 This is a schematic diagram of the base and gear set structure of the present invention.

[0029] In the diagram: 1. Base plate; 2. Mounting shell; 21. Baffle; 22. Top partition; 221. Connecting hole; 23. Bottom partition; 231. Waist-shaped hole; 24. Limiting groove; 241. Top sliding groove; 242. Bottom sliding groove; 25. Channel; 26. Upper pressure block; 261. Top fixing strip; 262. Upper chain tooth groove; 263. Guide block; 264. Connecting piece; 265. Laser detection sensor; 27. Lower pressure block; 271. Bottom fixing strip; 272. Lower chain tooth 3. Slot; 4. Drive motor; 5. First gear; 6. Second gear; 7. Transmission rod; 8. First threaded part; 9. Second threaded part; 10. Anti-collision ring; 11. Photoelectric switch; 12. Third gear; 13. Linkage rod; 24. Third threaded part; 35. Fourth threaded part; 46. Main arm; 7. Working motor; 8. Drive sprocket; 9. Guide sprocket; 10. Chain; 11. Rotary mechanism; 12. Lifting mechanism; 13. Column base assembly. Detailed Implementation

[0030] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments. Terms such as “upper,” “inner,” “middle,” “left,” “right,” and “one” used in this specification are merely for clarity of description and are not intended to limit the scope of the invention. Changes or adjustments to their relative relationships, without substantially altering the technical content, should also be considered within the scope of the invention.

[0031] Reference Figures 1 to 3 As shown, since the automatic engagement mechanism of the present invention is mainly applied to lifting robots (sometimes also called bridge erecting machines), before introducing the automatic engagement mechanism of the present invention, the mechanical structure of the lifting robot related to the present invention will be introduced first: The lifting robot includes a main arm 6 with a rotary mechanism 65 and a lifting mechanism 66 slidably connected at the bottom. A column base assembly 67 is slidably connected at the top of the main arm 6. The vertical cross-section of the main arm 6 parallel to its length direction is a parallelogram, and guide sprockets 63 are provided at each of its four apex corners. A working motor 61 is bolted to the side of the main arm 6. The drive end of the working motor 61 coaxially rotates the drive sprocket 62. The four guide sprockets 63 and the drive sprocket 62 are meshed and driven by the same traction chain, which is in the shape of a ring. Meanwhile, the number of automatic engagement mechanisms in this invention corresponds to the number of the rotary mechanism 65, the lifting mechanism 66, and the two column base assemblies 67. The automatic engagement mechanisms are locked and connected to the rotary mechanism 65, the lifting mechanism 66, and the two column base assemblies 67 respectively. The traction chain passes through the engagement end of the automatic engagement mechanism. By controlling the engagement or disengagement of the automatic engagement mechanism, the automatic engagement mechanism and the traction chain can move synchronously or desynchronize. Compared to the prior art using multiple traction mechanisms, this method offers advantages in cost savings and ease of operation.

[0032] Based on the above description of the mechanical structure of the hoisting robot, the mechanical structure of the automatic engagement mechanism of the present invention is disclosed below:

[0033] Reference Figures 4 to 9 As shown, an automatic engagement mechanism for a precast component hoisting machine includes a base plate 1 with a mounting shell 2 and a drive motor 3. The mounting shell 2 has a limiting groove 24 extending axially along the drive shaft of the drive motor 3. An upper pressure block 26 and a lower pressure block 27 are slidably connected within the limiting groove 24. Upper chain tooth grooves 262 and lower chain tooth grooves 272 are respectively provided on opposite sides of the upper pressure block 26 and lower pressure block 27. Both the upper chain tooth groove 262 and lower chain tooth groove 272 engage with the traction chain. The toothed rail surfaces are compatible, and the side of the mounting housing 2 has a channel 25 between the upper pressure block 26 and the lower pressure block 27. The base plate 1 is rotatably connected to the transmission rod 41. The outer circumference of the transmission rod 41 is provided with a first threaded part 42 and a second threaded part 43 with opposite thread directions on both sides along the length direction. The transmission rod 41 passes through the upper pressure block 26 and the lower pressure block 27 respectively through the first threaded part 42 and the second threaded part 43. A transmission component is provided between the transmission rod 41 and the drive shaft of the drive motor 3.

[0034] Specifically, this invention aims to achieve the function of engaging or disengaging the traction rope (traction chain) of the traction mechanism of the hoisting robot. Therefore, a channel 25 is formed between the upper pressure block 26 and the lower pressure block 27 by slidingly setting the limiting groove 24 of the mounting shell 2. This channel 25 allows the chain 64 to pass through. Under the driving action of the drive motor 3, the transmission rod 41 rotates synchronously with the drive shaft of the drive motor 3 through the transmission action of the transmission component. The first threaded portion 42 and the second threaded portion 43 of the transmission rod 41 have opposite spiral directions. Under the limiting action of the outer periphery of the limiting groove 24, the upper pressure block 26 and the lower pressure block 27 can be driven to move in opposite or opposite directions. When the upper pressure block 26 and the lower pressure block 27 move relative to each other, the upper chain tooth groove 262 of the upper pressure block 26 and the lower chain tooth groove 272 of the lower pressure block 27 respectively engage with the upper and lower chain tooth rail surfaces of the chain 64, thereby achieving the function of engaging the chain 64, and thus achieving the function of the automatic engagement mechanism moving synchronously with the chain 64. Conversely, when the upper pressure block 26 and the lower pressure block 27 move in opposite directions, the engagement of the upper pressure block 26 and the lower pressure block 27 with the chain 64 can be released, thereby realizing the function of releasing the automatic engagement mechanism and the chain 64 moving synchronously.

[0035] Reference Figures 4 to 9As shown, the structure of the mounting housing 2 is disclosed. The mounting housing 2 includes two baffles 21 connected to the base plate 1. The two baffles 21 are spaced apart, and the gap between the two baffles 21 forms the limiting groove 24. Therefore, the limiting effect of the two baffles 21 is used to constrain the upper pressing block 26 and the lower pressing block 27 between the two baffles 21. Bottom partitions 23 are provided on both sides of the limiting groove 24 near the base plate 1 and along the direction perpendicular to the line connecting the two baffles 21. A bottom sliding groove 242 is formed between the two bottom partitions 23, and the lower pressing block 27 is slidably connected to the bottom sliding groove 242. Top partitions 22 are provided on both sides of the limiting groove 24 away from the base plate 1 and along the direction perpendicular to the line connecting the two baffles 21. A top sliding groove 241 is formed between the two top partitions 22, and the upper pressing block 26 is slidably connected to the top sliding groove 241. Therefore, the limiting groove 24 is further divided into a top sliding groove 241 and a bottom sliding groove 242, thereby restricting the sliding position of the upper pressure block 26 and the lower pressure block 27, thus realizing the function of clearly defining the sliding position of the upper pressure block 26 and the lower pressure block 27.

[0036] To achieve the function of driving the transmission rod 41 to rotate via the transmission component, the drive shaft of the drive motor 3 passes through the plane of the base plate 1. The transmission component includes a first gear 31 that rotates coaxially with the drive shaft of the drive motor 3, and a second gear 4 that rotates coaxially with the end of the transmission rod 41 located on the base plate 1 away from the mounting shell 2. The second gear 4 meshes with the first gear 31. Thus, through the driving action of the drive motor 3, the rotation of the first gear 31 simultaneously drives the second gear 4 to rotate synchronously, and the transmission rod rotates synchronously with the second gear 4.

[0037] Reference Figures 4 to 9 As shown, the function of the upper pressure block 26 and the lower pressure block 27 moving up and down is mainly achieved by the limiting effect of the inner walls (baffle 21, top partition 22, bottom partition 23) of the bottom slide groove 242 and the top slide groove 241. Therefore, during the up and down sliding process of the upper pressure block 26 and the lower pressure block 27, surface friction will occur, which will increase the surface wear of the upper pressure block 26 and the lower pressure block 27 and cause resistance to up and down movement. Therefore, in order to solve this technical problem, the base plate 1 is rotatably connected to the linkage rod 51. The linkage rod 51 is located on the side of the transmission rod 41 away from the drive motor 3. The outer circumference of the linkage rod 51 is provided with a third threaded part 52 and a fourth threaded part 53 with opposite thread directions on both sides along the length direction. The linkage rod 51 passes through the upper pressure block 26 and the lower pressure block 27 through the third threaded part 52 and the fourth threaded part 53 respectively. The first threaded part 42 and the third threaded part 52 have opposite thread directions and are both located close to the side of the base plate 1. The linkage rod 51 is located at the end of the base plate 1 away from the mounting shell 2 and has a third gear 5 that rotates coaxially. The third gear 5 meshes with the second gear 4.

[0038] Specifically, the first gear 31 is rotated by the driving action of the drive motor 3. According to the meshing transmission of the gears, the second gear 4 and the third gear 5 rotate, and the rotation of the second gear 4 and the third gear 5 is opposite. The threads of the first threaded part 42 and the third threaded part 52 are opposite in direction. Therefore, under the synchronous driving action of the transmission rod 41 and the linkage rod 51, the guiding effect of the upper pressure block 26 and the lower pressure block 27 moving along the length of the transmission rod 41 can be improved, and the damage caused by the sliding friction of the upper pressure block 26 and the lower pressure block 27 on the inner wall of the bottom slide groove 242 and the top slide groove 241 can be reduced.

[0039] Specifically, the diameter of the third gear 5 is the same as that of the second gear 4, while the diameter of the second gear 4 is larger than that of the first gear 31. Therefore, under the driving action of the drive motor 3, the second gear 4 and the third gear 5 can rotate at the same speed, with the second gear 4 rotating at a lower speed than the first gear 31. This further improves the sliding stability of the upper pressure block 26 and the lower pressure block 27.

[0040] To reduce wear caused by collisions between the second gear 4 and the third gear 5 and the base plate 1 during rotation, anti-collision rings 44 are coaxially mounted on the transmission rod 41 and the linkage rod 51 located between the base plate 1 and the second gear 4. The anti-collision rings 44 are made of damping rubber material and abut against the second gear 4, the third gear 5 and the base plate 1, providing good buffering and anti-collision effects.

[0041] Reference Figures 4 to 9 As shown, to limit the position of the channel 25, the top partition 22 and the bottom partition 23 are spaced apart. The channel 25 is located at the spaced position between the top partition 22 and the bottom partition 23, and also at the spaced position between the transmission rod 41 and the linkage rod 51. This limits the position of the channel 25 and the position of the chain 64 passing through it, thereby limiting the contact force between the upper pressure block 26 or the lower pressure block 27 and the chain 64 to the position between the transmission rod 41 and the linkage rod 51, thus achieving the beneficial effect of improving the transmission stability of the chain 64.

[0042] To facilitate accurate determination of whether chain 64 has entered channel 25, and to check for misalignment or displacement of chain 64, thereby reducing the probability of invalid engagement of chain 64 between upper pressure block 26 and lower pressure block 27, a connecting piece 264 is screwed to the side of the top partition 22. A laser detection sensor 265 is screwed to the connecting piece 264. The sensing end of the laser detection sensor 265 is aligned with the length of the transmission rod 41 and perpendicular to the extension direction of channel 25. Therefore, the sensing end of the laser detection sensor 265 can be used to detect whether chain 64 is present in channel 25 and to check for any displacement of chain 64, thus reducing the probability of subsequent invalid engagement. When the chain 64 passes through the channel 25 and enters the corresponding position inside the mounting housing 2, the sensing end of the laser detection sensor 265 can effectively sense the chain 64. This means that the chain 64 can be engaged by controlling the relative movement of the upper pressure block 26 and the lower pressure block 27. At the same time, the laser detection sensor 265 transmits the sensing signal to the corresponding control circuit to control the subsequent related circuits to perform further control work.

[0043] To determine whether the upper pressure block 26 and the lower pressure block 27 are properly engaged or disengaged, thereby reducing the possibility of incomplete engagement or disengagement of the upper pressure block 26 and the lower pressure block 27, photoelectric switches 45 are provided at both ends of the second threaded portion 43 of the transmission rod 41 and the fourth threaded portion 53 of the linkage rod 51 along the length direction. The sensing end of the photoelectric switch 45 of the transmission rod 41 is directly opposite to the sensing end of the photoelectric switch 45 of the linkage rod 51, and the sensing ends of the photoelectric switches 45 of the transmission rod 41 and the linkage rod 51 near the channel 25 are also directly opposite to the channel 25. It should be noted that each link of the chain 64 has peaks at both ends, and a trough is formed between two peaks in that link. Simultaneously, a trough is also formed between adjacent links of the chain 64.

[0044] The aforementioned structure, used to detect and determine whether the upper pressure block 26 and the lower pressure block 27 are fully engaged with the chain 64, primarily determines whether the upper chain tooth groove 262 of the upper pressure block 26 and the lower chain tooth groove 272 of the lower pressure block 27 are well matched with the peaks and valleys in the chain tooth track surface of the chain 64, and reduces the occurrence of misalignment. Therefore, in this embodiment, the sensing end of the photoelectric switch 45 near the channel 25 of the transmission rod 41 and the linkage rod 51 is horizontally aligned with the valley position of the top track surface of the chain 64 entering the channel 25. Therefore, when it is necessary to use the upper pressure block 26 and the lower pressure block 27 to simultaneously engage the chain 64 in the channel 25, the working motor 61 drives the chain 64 to move, so that the sensing end of the transmission rod 41 near the photoelectric switch 45 of the channel 25 passes through the trough of the chain 64 and is aligned with the sensing end of the linkage rod 51 near the photoelectric switch 45 of the channel 25. This achieves the positioning of the chain 64 to be engaged. Afterwards, the drive motor 3 drives the transmission rod 41 and the linkage rod 51 to rotate, thereby realizing the function of the upper pressure block 26 and the lower pressure block 27 moving relative to each other and engaging the chain 64. At this time, the upper chain tooth groove 262 of the upper pressure block 26 and the lower chain tooth groove 272 of the lower pressure block 27 perfectly engage with the corresponding chain tooth rail surface of the chain 64. At this time, the upper pressure block 26 is positioned between the sensing ends of the photoelectric switches 45 in both the transmission rod 41 and the linkage rod 51, which are close to the channel 25. Simultaneously, the sensing ends of the photoelectric switches 45 in both the transmission rod 41 and the linkage rod 51, which are far from the channel 25, are directly opposite each other, triggering the photoelectric switches 45 to transmit a stable engagement electrical signal to the corresponding control circuit. Conversely, if the upper pressure block 26 and the lower pressure block 27 are in contact with the engagement chain 64, the photoelectric switches 45 transmit a release engagement electrical signal to the corresponding control circuit.

[0045] Since the chain 64 has plate-shaped baffles on both sides of the chain teeth, in order for the chain tooth grooves of the upper pressure block 26 and / or the lower pressure block 27 to properly engage and limit the chain tooth guide surface of the chain 64, a top fixing strip 261 is fixedly connected to the end face of the upper pressure block 26 facing the lower pressure block 27. The top fixing strip 261 is directly opposite the channel 25, and the length direction of the top fixing strip 261 is perpendicular to the drive rod 41. The upper chain tooth groove 262 is formed on the end face of the top fixing strip 261 away from the upper pressure block 26. A bottom fixing strip 271 is fixedly connected to the end face of the lower pressure block 27 facing the upper pressure block 26. The bottom fixing strip 271 is directly opposite the top fixing strip 261, and the lower chain tooth groove 272 is formed on the end face of the bottom fixing strip 271 away from the lower pressure block 27. Therefore, by setting a top fixing strip 261 and a bottom fixing strip 271, and limiting the thickness of the top fixing strip 261 and the bottom fixing strip 271 to be less than the thickness of the chain 64, when the upper pressure block 26 and the lower pressure block 27 approach each other to engage the chain 64, the upper chain tooth groove 262 of the upper pressure block 26 and the lower chain tooth groove 272 of the lower pressure block 27 can be perfectly engaged with the chain tooth rail surface of the chain 64, thereby achieving the function of improving engagement stability.

[0046] To reduce the possibility of chain 64 shifting or deviating within channel 25, two guide blocks 263 are fixedly connected to the end face of the upper pressure block 26 facing the lower pressure block 27. The two guide blocks 263 are distributed on both sides of the top fixing bar 261 along a direction perpendicular to its length, with channel 25 located between the two guide blocks 263. Therefore, the limiting effect of the two guide blocks 263 can keep the chain 64 in a relatively stable position, ensuring that the tooth surface of the chain 64 is always aligned with the top fixing bar 261 and the bottom fixing bar 271, and improving the effectiveness of the engagement between the upper pressure block 26 and the lower pressure block 27 and the tooth surface of the chain 64.

[0047] To enable the automatic engagement mechanism of this invention to connect with corresponding components, a connecting hole 221 is provided through the side of the top partition 22, and a slotted hole 231 is provided through the side of the bottom partition 23. The axial direction of the slotted hole 231 is consistent with the axial direction of the connecting hole 221. Therefore, during installation, bolts can be passed through the through hole and the slotted hole 231 to lock and connect with the corresponding components, thereby achieving the connection and installation function. The slotted hole 231 also facilitates the adjustment of the bolt installation position.

[0048] The embodiments of the present invention are not limited thereto. Based on the above description of the present invention, and using common technical knowledge and conventional means in the field, the present invention can be modified, replaced or combined in various other forms without departing from the basic technical idea of ​​the present invention, and all such modifications, replacements or combinations fall within the scope of protection of the present invention.

Claims

1. An automatic engagement mechanism specifically designed for precast component hoisting machines, characterized in that: The device includes a base plate with a mounting shell and a drive motor. The mounting shell has a limiting groove that extends axially along the drive shaft of the drive motor. An upper pressure block and a lower pressure block are slidably connected within the limiting groove. The upper and lower pressure blocks have upper and lower chain tooth grooves on their opposite sides, respectively. The mounting shell has a channel between the upper and lower pressure blocks for the chain to pass through. The base plate is rotatably connected to a transmission rod. The outer circumference of the transmission rod has a first threaded portion and a second threaded portion with opposite thread directions on both sides along its length. The transmission rod passes through the first and second threaded portions, respectively, threaded through the upper and lower pressure blocks. A transmission component is provided between the transmission rod and the drive shaft of the drive motor.

2. A self-gripping mechanism for a precast component hoist as claimed in claim 1, characterised in that: The mounting housing includes two baffles connected to the base plate, the two baffles being spaced apart, the gap between the two baffles forming the limiting groove; a bottom partition is provided on both sides of the limiting groove near the base plate, perpendicular to the line connecting the two baffles, a bottom sliding groove is formed between the two bottom partitions, and the lower pressing block is slidably connected to the bottom sliding groove; a top partition is provided on both sides of the limiting groove away from the base plate, perpendicular to the line connecting the two baffles, a top sliding groove is formed between the two top partitions, and the upper pressing block is slidably connected to the top sliding groove.

3. A self-gripping mechanism for a precast component hoist as claimed in claim 2, characterised in that: The drive shaft of the drive motor passes through the plane of the base plate. The transmission component includes a first gear that rotates coaxially with the drive shaft of the drive motor. The transmission rod has a second gear that rotates coaxially with the end of the base plate away from the mounting shell. The second gear meshes with the first gear.

4. The automatic engagement mechanism for a precast component hoisting machine as described in claim 3, characterized in that: The base plate is rotatably connected to a linkage rod. The outer circumference of the linkage rod is provided with a third threaded portion and a fourth threaded portion with opposite threads on both sides along the length direction. The linkage rod passes through the upper pressure block and the lower pressure block respectively through the third threaded portion and the fourth threaded portion. The threads of the first threaded portion and the third threaded portion have opposite threads. A third gear is coaxially rotated at the end of the linkage rod away from the mounting shell. The third gear meshes with the second gear.

5. The automatic engagement mechanism for a precast component hoisting machine as described in claim 4, characterized in that: The top partition and the bottom partition are spaced apart, and the channel is located at the spaced position between the top partition and the bottom partition, and at the spaced position between the transmission rod and the linkage rod.

6. The automatic engagement mechanism for a precast component hoisting machine as described in claim 5, characterized in that: A laser detection sensor is provided on the side of the top partition. The sensing end of the laser detection sensor is aligned with the length direction of the transmission rod, and the sensing end of the laser detection sensor intersects with the extension direction of the channel. Photoelectric switches are provided at both ends of the second threaded portion of the transmission rod and the fourth threaded portion of the linkage rod along the length direction. The sensing ends of the photoelectric switches on the transmission rod and the linkage rod are directly opposite each other. Furthermore, the sensing ends of the photoelectric switches on the transmission rod and the linkage rod near the channel are directly opposite the channel.

7. The automatic engagement mechanism for a precast component hoisting machine as described in claim 5, characterized in that: A top fixing strip is fixedly connected to the end face of the upper pressure block facing the lower pressure block. The top fixing strip is directly opposite the channel, and the length direction of the top fixing strip is perpendicular to the transmission rod. The upper chain tooth groove is formed on the end face of the top fixing strip away from the upper pressure block. A bottom fixing strip is fixedly connected to the end face of the lower pressure block facing the upper pressure block. The bottom fixing strip is directly opposite the top fixing strip, and the lower chain tooth groove is formed on the end face of the bottom fixing strip away from the lower pressure block.

8. The automatic engagement mechanism for a precast component hoisting machine as described in claim 7, characterized in that: Two guide blocks are fixedly connected to the end face of the upper pressure block facing the lower pressure block. The two guide blocks are distributed on both sides of the top fixing strip along the length direction perpendicular to the top fixing strip, and the channel is located between the two guide blocks.

9. The automatic engagement mechanism for a precast component hoisting machine as described in claim 3, characterized in that: The top partition has a connecting hole through its side, and the bottom partition has a waist-shaped hole through its side, with the axis of the waist-shaped hole aligned with the axis of the connecting hole.

10. The automatic engagement mechanism for a precast component hoisting machine as described in claim 5, characterized in that: The transmission rod and the linkage rod are both located between the base plate and the second gear and are coaxially rotated with anti-collision rings.

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