Chain guide structure of a loop-chain type intelligent hoist

Abstract

The present invention provides a chain guiding structure for a ring-chain type intelligent hoist, belonging to the technical field of hoists. It solves the technical problems such as the complex structure of the existing chain guiding structure and easy chain jamming. This chain guiding structure includes a hoist housing and a sprocket. A fixed seat is fixedly arranged inside the hoist housing. A passage groove is arranged on the fixed seat. A chain guide is sleeved on the outer periphery of the sprocket. A chain guiding channel is provided inside the chain guide. The chain guiding channel includes an arc channel, and a first inlet and a second inlet that are directly connected to both ends of the arc channel. A support block protrudes axially along the outer side of the upper end of the chain guide. A support groove that is spliced and matched with the support block is arranged inside the hoist housing. The first inlet and the second inlet are located at the lower end of the chain guide. The lower end of the chain guide is in clearance fit with the passage groove. The second inlet extends out of the lower end of the passage groove. The present invention reduces vibration during the operation of the hoist and prevents the phenomena of chain jamming and chain derailment of the ring chain.

Description

Technical Field

[0001] The present invention relates to the technical field of hoists, and particularly to a chain guiding structure of a ring chain type intelligent hoist. Background Art

[0002] The compact design of the ring chain type intelligent hoist stems from the structural optimization of its core components. Compared with wire rope intelligent hoists, this hoist uses a high-density wound ring chain and a precision sprocket set to replace the bulky wire rope drum device. The unique overlapping buckle structure of the ring chain enables it to have stronger space utilization in the vertical direction, and when combined with a miniaturized sprocket set, a more compact transmission layout can be achieved. At the same time, since the ring chain system does not require reserved space for the deployment of wire ropes, the drive unit can integrate more efficient miniaturized power modules, which enables the whole machine to maintain a strong load capacity (usually 2 - 3 times that of wire rope hoists of the same volume) while reducing the overall volume by about 40% compared to traditional intelligent lifting equipment. This structural characteristic is particularly suitable for industrial scenarios with limited space and shows significant advantages in narrow factory environments or precision assembly lines. However, the ring chain and sprocket in the ring chain type intelligent hoist require a high degree of fitting precision to enable the sprocket to drive the ring chain to transmit one section at a time.

[0003] Currently, for the chain hoisting device and electric ring chain hoist with the patent application number 202411702748.6, it discloses a sprocket, a chain, an outer contour limiting device, and a housing. The outer contour limiting device is used to limit the outer circle trajectory of the rotation path of the chain, and the housing is sleeved outside the outer contour limiting device to provide rigid support. Through the double limiting and clearance control of the outer contour limiting device and the housing, the displacement superposition of the chain is reduced to avoid chain jamming and chain derailment. This structure relaxes the precision requirements for the chain and sprocket, but the clearance (1 - 2 mm) between the housing and the limiting device still needs to be strictly controlled. The clearance fit is sensitive to long-term wear, which may lead to the failure of the limit and cause the risk of chain derailment; this structure has high complexity, increasing the assembly difficulty and production cost.

[0004] Moreover, when one end of the ring chain in the ring chain type intelligent hoist is hung with a hook and the other end is retracted, it vertically falls back into the chain box. When the hook is lowered, the ring chain in the chain box is taken out of the chain box through the circumferential movement of the sprocket. However, after the ring chain in the chain box accumulates to a certain height, the ring chain is in a slack state, and the ring chain cannot timely match the tooth sockets of the sprocket, resulting in the phenomenon that the ring chain falls out of the sprocket or gets jammed. Summary of the Invention

[0005] Aiming at the deficiencies of the existing technology, the purpose of the present invention is to provide a chain guiding structure of a ring chain type intelligent hoist. The technical problem to be solved by the present invention is how to reduce vibration during the operation of the ring chain type intelligent hoist and prevent the phenomena of chain jamming and chain derailment.

[0006] The object of the present invention can be achieved by the following technical solutions: A chain guiding structure of a loop chain type intelligent hoist, including a hoist housing, a driving device is arranged inside the hoist housing, the driving device includes a driving shaft, one end of the driving shaft is fixedly connected with a sprocket, a fixed seat is fixedly arranged inside the hoist housing, the fixed seat is located below the sprocket, a passage groove is arranged on the fixed seat, a chain guide is sleeved on the outer periphery of the sprocket, a chain guiding channel is arranged inside the chain guide, the chain guiding channel includes an arc channel and a first inlet and a second inlet that are directly connected to both ends of the arc channel, a support block protrudes axially outward from the upper end portion of the chain guide, a support groove that is spliced and matched with the support block is arranged inside the hoist housing, the first inlet and the second inlet are located at the lower part of the chain guide, the lower part of the chain guide is in clearance fit with the passage groove, one end of the chain guide located at the second inlet protrudes downward to form a guiding portion, and the guiding portion extends out of the lower end of the passage groove. The driving device includes a driving motor and a speed reducing component, the driving shaft is fixed to the speed reducing component, and the driving motor rotates the driving shaft and drives the sprocket to rotate to realize the lifting of the loop chain.

[0007] This chain guiding structure forms a non-fixed and locked structure through the splicing and matching of the support block and the support groove and the clearance fit between the lower end portion of the chain guide and the passage groove, so that the chain guide has a certain space movement clearance. Because the loop chain will touch the chain guiding channel of the chain guide when it descends and ascends rapidly, the certain space movement clearance of the chain guide can well absorb the touch force brought by the loop chain, prevent the force received by the chain guide from being directly transmitted to the hoist housing, effectively reduce the vibration of the hoist housing, and make the loop chain type intelligent hoist operate more stably. Further, after the second inlet extends out of the lower end of the passage groove, since the second inlet is located at the upper end of the chain box, that is to say, the loop chain coming out of the second inlet will vertically fall into the chain box, and the loop chain in the chain box will accumulate below the second inlet. After accumulating to a certain height, the loop chain between the second inlet and the chain box is in a slack state. When starting instantaneously, the sprocket rotates, and the loop chain can be straightened first at the guiding portion and then quickly enter the second inlet and match with the sprocket, reducing the phenomena of chain jamming and chain derailment of the loop chain. And the certain space movement clearance of the chain guide can absorb the force of the loop chain touching the mouth of the second inlet, effectively reduce the vibration of the hoist housing, and make the loop chain type intelligent hoist operate more stably.

[0008] In the chain guiding structure of the above-mentioned loop chain type intelligent hoist, the sprocket has six teeth. There is an oval tooth socket between two adjacent teeth, and a strip-shaped tooth socket communicating with two adjacent oval tooth sockets is in the middle of one tooth. The sprocket adopted in this structure has six teeth. Six teeth can lift and lower the loop chain faster than five teeth. The sprocket structure with six teeth and the oval tooth socket can realize the progressive engagement of the loop chain with a 60° phase angle, reduce the impact noise. And the loop chain is located between the strip-shaped tooth socket and the chain guiding channel. One side of the two sides of the loop chain is in the strip-shaped tooth socket and the other side is in the chain guiding channel. The 60° phase angle of the six teeth cooperates with the chain guiding channel to make the loop chain rotate along the sprocket more smoothly, reduce the impact noise, reduce the vibration, and improve the stable operation of the whole machine.

[0009] In the chain guiding structure of the above-mentioned loop chain type intelligent hoist, the first inlet and outlet includes a first transverse channel and a first longitudinal channel in a cross shape, and the second inlet and outlet includes a second transverse channel and a second longitudinal channel in a cross shape. The minimum distance H1 between the first transverse channel and the second transverse channel is greater than or equal to the minimum distance H2 between two opposite strip-shaped tooth sockets. The cross-shaped channels can better guide the loop chain into the sprocket and effectively eliminate the loop chain jitter phenomenon.

[0010] In the chain guiding structure of the above-mentioned loop chain type intelligent hoist, one side of the first transverse channel close to the second transverse channel has a flat first guiding groove, and one side of the second transverse channel close to the first transverse channel has a flat second guiding groove. The distance between the bottom surface of the first guiding groove and the bottom surface of the second guiding groove is the minimum distance between the first transverse channel and the second transverse channel. The guiding groove and the transverse channel are both planes, and as long as the distance between the bottom surface of the first guiding groove and the bottom surface of the second guiding groove is greater than or equal to the minimum distance between the first transverse channel and the second transverse channel, it reduces the manufacturing precision and can better make the loop chain enter the sprocket, effectively eliminating the loop chain jitter phenomenon, reducing the vibration, and preventing the loop chain from jamming and derailing.

[0011] In the chain guiding structure of the above-mentioned loop chain type intelligent hoist, one side of the second transverse channel far from the first transverse channel has a first arc-shaped guiding groove. The first arc-shaped guiding groove is located in the guiding-in part and increases gradually from top to bottom. Since the second transverse channel is above the chain box, the first arc-shaped guiding groove can better guide the transverse loop chain into the second transverse channel, reduce the vibration of the chain guide under stress and reduce the wear of the chain guide, making the loop chain type intelligent hoist operate more stably.

[0012] In the chain guiding structure of the above-mentioned loop chain type intelligent hoist, one side of the second longitudinal channel has a second arc-shaped guiding groove, the second arc-shaped guiding groove is located in the guiding-in part, and the second arc-shaped guiding groove gradually increases from top to bottom. Since the second longitudinal channel is located above the chain box, the second arc-shaped guiding groove can better guide the longitudinal loop chain into the second longitudinal channel, reduce the force and vibration on the chain guide, and reduce the wear of the chain guide. The combination of the second arc-shaped guiding groove and the first arc-shaped guiding groove can smooth the loop chain in advance, so that the loop chain loose in the chain box can quickly enter the second transverse channel and the second longitudinal channel, improving the overall efficiency.

[0013] In the chain guiding structure of the above-mentioned loop chain type intelligent hoist, the chain guide includes a left housing and a right housing. The support block is located at the upper end of the left housing. The left housing and the right housing are fixed by fasteners, and a chain guiding channel is formed between the left housing and the right housing. For the convenience of molding, using the left and right housings can simplify the mold, reduce costs, and improve production efficiency.

[0014] In the chain guiding structure of the above-mentioned loop chain type intelligent hoist, a guiding block is integrally formed on the left housing. The guiding block is located between the first inlet and outlet and the second inlet and outlet. The upper end surface of the guiding block is an arc surface, and the arc surface is located in the strip-shaped tooth socket but does not contact the strip-shaped tooth socket.

[0015] In the chain guiding structure of the above-mentioned loop chain type intelligent hoist, the chain guide includes an upper housing and a lower housing. The support block and the arc-shaped channel are located in the upper housing, the first inlet and outlet and the second inlet and outlet are located in the lower housing, and a guiding block is formed between the first inlet and outlet and the second inlet and outlet. The upper end surface of the guiding block is an arc surface. For the convenience of molding, using the upper and lower housings can simplify the mold, reduce costs, and improve production efficiency.

[0016] In the chain guiding structure of the above-mentioned loop chain type intelligent hoist, the chain guide is made of cast iron material.

[0017] Compared with the prior art, the technical effects of the present invention are as follows: First, through the non-rigid splicing design of the cooperation between the support block and the support groove and the clearance fit between the lower end of the chain guide and the aisle groove, a dynamic buffer structure is formed, which can effectively absorb the impact force when the loop chain moves at high speed, avoid the vibration being directly transmitted to the hoist shell, and further reduce the impact noise when the loop chain is engaged in combination with the 60° phase angle progressive engagement design of the six-tooth sprocket and the cooperation of the elliptical / bar-shaped tooth socket, realizing stable operation with low vibration and low noise. Second, adopt the cross-shaped inlet and outlet + guiding groove composite structure to accurately guide the two-way movement path of the loop chain. When starting, the loose loop chain is quickly smoothed through the arc-shaped guiding groove of the second inlet and outlet, avoiding chain jamming caused by accumulation; during operation, the cooperation of the guiding groove and the sprocket tooth socket eliminates the loop chain jitter, prevents the chain link from being misaligned or disengaged from the engagement, and reduces the risks of chain jamming and chain disengagement. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a perspective view of a one - loop chain - type intelligent hoist according to an embodiment of the present invention.

[0019] Figure 2 It is a front view of a chain - guiding structure according to an embodiment of the present invention.

[0020] Figure 3 It is a bottom view of a chain - guiding structure according to an embodiment of the present invention.

[0021] Figure 4 It is a perspective view of a chain - guide of an embodiment of the present invention Figure 1 。

[0022] Figure 5 It is a perspective view of a chain - guide of an embodiment of the present invention Figure 2 。

[0023] Figure 6 It is an exploded view of a chain - guide of an embodiment of the present invention Figure 1 。

[0024] Figure 7 It is an exploded view of a chain - guide of an embodiment of the present invention Figure 2 。

[0025] Figure 8 It is a perspective view of a hoist housing and a fixed seat according to an embodiment of the present invention.

[0026] Figure 9 It is a perspective view of a sprocket according to an embodiment of the present invention.

[0027] Figure 10 It is an exploded view of a chain - guide according to an embodiment two of the present invention.

[0028] Drawing number markings: 1. Hoist housing; 101. Support groove; 2. Driving device; 201. Driving shaft; 3. Sprocket; 301. Teeth; 302. Oval tooth socket; 303. Strip - shaped tooth socket; 4. Chain box; 5. Fixed seat; 501. Aisle groove; 6. Chain - guide; 601. Arc - shaped channel; 602. First inlet / outlet; 6021. First horizontal channel; 6022. First vertical channel; 6023. First guiding groove; 603. Second inlet / outlet; 6031. Second horizontal channel; 6032. Second vertical channel; 6033. Second guiding groove; 6034. First arc - shaped guiding groove; 6035. Second arc - shaped guiding groove; 604. Support block; 605. Guiding part; 61. Left housing; 62. Right housing; 63. Guiding block; 64. Upper housing; 65. Lower housing; 7. Ring chain. Detailed implementation manners

[0029] The following are specific embodiments of the present invention and, in combination with the accompanying drawings, the technical solutions of the present invention are further described, but the present invention is not limited to these embodiments.

[0030] It should be noted that the descriptions of directions such as "up", "down", "left", "right", "top", and "bottom" in the present invention are all defined based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the described device must be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present invention.

[0031] Embodiment 1: According to Figures 1 to 9 As shown, a chain guiding structure of a ring chain 7 type intelligent hoist includes a hoist housing 1. A driving device 2 is arranged inside the hoist housing 1. The driving device 2 includes a driving motor and a reduction component. A driving shaft 201 is fixedly connected to the reduction component. One end of the driving shaft 201 is fixedly connected to a sprocket 3. The driving motor rotates the driving shaft 201 and drives the sprocket 3 to rotate to realize the lifting and lowering of the ring chain 7. The ring chain 7 is formed by two annular chain loops nested with each other. One end of the ring chain 7 hangs a hook and the other end is located inside a chain box 4. The chain box 4 is swingably connected to the hoist housing 1, and the chain box 4 can swing slightly left and right relative to the housing.

[0032] A fixed seat 5 is fixedly arranged inside the hoist housing 1. The fixed seat 5 is located below the sprocket 3 and above the chain box 4. A passage groove 501 is arranged on the fixed seat 5. A chain guide 6 is sleeved on the outer periphery of the sprocket 3. The chain guide 6 is made of cast iron material and formed by casting. The chain guide 6 made of cast iron material has good wear resistance. There is a chain guiding channel inside the chain guide 6. The chain guiding channel includes an arc channel 601, a first inlet / outlet 602 and a second inlet / outlet 603 that are directly connected to both ends of the arc channel 601. A support block 604 protrudes axially along the outer side of the upper end of the chain guide 6. The support block 604 is preferably cylindrical. A support groove 101 that is spliced and matched with the support block 604 is arranged inside the hoist housing 1. The first inlet / outlet 602 and the second inlet / outlet 603 are located at the lower part of the chain guide 6. The lower part of the chain guide 6 is in clearance fit with the passage groove 501. One end of the chain guide 6 located at the second inlet / outlet 603 protrudes downward to form a guiding part 605. The guiding part 605 extends out of the lower end of the passage groove 501. The lower end surface of the guiding part 605 is located below the fixed seat 5. The splicing and matching of the support block 604 and the support groove 101 and the clearance fit between the lower end part of the chain guide 6 and the passage groove 501 form a non-fixed and locked structure, enabling the chain guide 6 to have a certain space movement clearance, and guiding the endless chain 7 in an orderly manner through the guiding part 605, avoiding directly fixing to the fixed seat 5 on the hoist housing 1, preventing the fixed seat 5 from vibrating. Moreover, when the endless chain 7 descends and ascends rapidly, it will touch the chain guiding channel of the chain guide 6. The certain space movement clearance of the chain guide 6 can well absorb the touching force brought by the endless chain 7, preventing the force received by the chain guide 6 from being directly transmitted to the hoist housing 1 and reducing the collision sound of the endless chain 7 directly against the chain guide 6, effectively reducing the vibration and noise of the hoist housing 1 and enabling the endless chain 7 type intelligent hoist to operate more stably. Further, after the second inlet / outlet 603 extends out of the lower end of the passage groove 501, since the second inlet / outlet 603 is located at the upper end of the chain box 4, that is to say, the endless chain 7 coming out of the second inlet / outlet 603 will vertically fall into the chain box 4. The endless chain 7 in the chain box 4 will accumulate below the second inlet / outlet 603. After accumulating to a certain height, the endless chain 7 between the second inlet / outlet 603 and the chain box 4 is in a slack state. When starting instantaneously, the sprocket 3 rotates, and the endless chain 7 can be smoothed in the guiding part 605 and then quickly enter the second inlet / outlet 603 and match with the sprocket 3, reducing the phenomena of chain jamming and chain derailment of the endless chain 7. And the certain space movement clearance of the chain guide 6 can absorb the force of the endless chain 7 touching the mouth of the second inlet / outlet 603, effectively reducing the vibration of the hoist housing 1 and enabling the endless chain 7 type intelligent hoist to operate more stably.

[0033] The first inlet / outlet 602 includes a first transverse channel 6021 and a first longitudinal channel 6022 in a cross shape, and the second inlet / outlet 603 includes a second transverse channel 6031 and a second longitudinal channel 6032 in a cross shape. The minimum distance H1 between the first transverse channel 6021 and the second transverse channel 6031 is greater than or equal to the minimum distance H2 between two opposite strip-shaped tooth sockets 303. The cross-shaped channels can better guide the endless chain 7 into the sprocket 3 and effectively eliminate the phenomenon of the endless chain 7 shaking. One side of the first transverse channel 6021 close to the second transverse channel 6031 has a straight first guiding groove 6023, and one side of the second transverse channel 6031 close to the first transverse channel 6021 has a straight second guiding groove 6033. The distance between the groove bottom surface of the first guiding groove 6023 and the groove bottom surface of the second guiding groove 6033 is the minimum distance between the first transverse channel 6021 and the second transverse channel 6031. The first guiding groove 6023 and the second guiding groove 6033 are arranged in parallel, and the distance between the groove bottom surface of the first guiding groove 6023 and the groove bottom surface of the second guiding groove 6033 is greater than or equal to the minimum distance between the first transverse channel 6021 and the second transverse channel 6031. This reduces the manufacturing precision and can better make the endless chain 7 enter the sprocket 3, effectively eliminating the phenomenon of the endless chain 7 shaking, reducing vibration, and preventing the phenomena of the endless chain 7 jamming and derailing. One side of the second transverse channel 6031 far from the first transverse channel 6021 has a first arc-shaped guiding groove 6034. The first arc-shaped guiding groove 6034 is located in the guiding part 605 and gradually expands from top to bottom. Since the second transverse channel 6031 is located above the chain box 4, the first arc-shaped guiding groove 6034 can better guide the transverse endless chain 7 into the second transverse channel 6031, reduce the vibration of the chain guide 6 under force and the wear of the chain guide 6, and make the endless chain type intelligent hoist operate more stably. One side of the second longitudinal channel 6032 has a second arc-shaped guiding groove 6035. The second arc-shaped guiding groove 6035 is located in the guiding part 605 and gradually expands from top to bottom. Since the second longitudinal channel 6032 is located above the chain box 4, the second arc-shaped guiding groove 6035 can better guide the longitudinal endless chain 7 into the second longitudinal channel 6032, reduce the vibration of the chain guide 6 under force and the wear of the chain guide 6. The combination of the second arc-shaped guiding groove 6035 and the first arc-shaped guiding groove 6034 can smooth the endless chain 7 in advance, enable the loose endless chain 7 in the chain box 4 to quickly enter the second transverse channel 6031 and the second longitudinal channel 6032, and improve the overall efficiency.

[0034] The chain guide 6 can be integrally formed by separately casting a left housing 61 and a right housing 62. The support block 604 is located at the upper end of the left housing 61. The left housing 61 and the right housing 62 are fixed by fasteners, and a chain guide channel is formed between the left housing 61 and the right housing 62. A guide block 63 is integrally formed on the left housing 61. The guide block 63 is located between the first inlet / outlet 602 and the second inlet / outlet 603. The upper end surface of the guide block 63 is an arc surface, and the arc surface is located within the strip-shaped tooth socket 303 but does not contact the strip-shaped tooth socket 303.

[0035] The sprocket 3 has six teeth 301. There is an oval tooth socket 302 between adjacent two teeth 301, and a strip-shaped tooth socket 303 communicating with the adjacent two oval tooth sockets 302 is formed in the middle of one tooth 301. Six teeth 301 can lift and lower the endless chain 7 faster than five teeth 301. The structure of the sprocket 3 with six teeth 301 and the oval tooth socket 302 can achieve a progressive engagement of the endless chain 7 at a 60° phase angle, reduce impact noise, and the endless chain 7 is located between the strip-shaped tooth socket 303 and the chain guide channel. One side of the two sides of the endless chain 7 is located within the strip-shaped tooth socket 303 and the other side is located within the chain guide channel. The 60° phase angle of the six teeth 301 cooperates with the chain guide channel to make the endless chain 7 rotate more smoothly along the sprocket 3, reduce impact noise, reduce vibration, and improve the stable operation of the whole machine. The tooth 301 includes a pair of symmetrically arranged tooth blocks. The strip-shaped tooth socket 303 runs through circumferentially between the pair of tooth blocks. There are two symmetrically arranged grooves on the inner side of the tooth block. The bottom surface of the groove is higher than the bottom surface of the strip-shaped tooth socket 303. The two pairs of grooves form an oval tooth socket 302, and an axially penetrating arc groove is recessed downward at the bottom of the oval tooth socket 302. The oval tooth socket 302 and the strip-shaped tooth socket 303 formed by the tooth block, the groove and the arc groove can increase the meshing contact area between the endless chain 7 and the sprocket 3, reduce the unit area load, increase the load capacity, and improve the load speed.

[0036] Embodiment 2: As Figure 10 shown, different from Embodiment 1, the chain guide 6 can be integrally formed by separately casting an upper housing 64 and a lower housing 65. The support block 604 and the arc channel 601 are located on the upper housing 64, and the first inlet / outlet 602 and the second inlet / outlet 603 are located on the lower housing 65. A guide block 63 is formed between the first inlet / outlet 602 and the second inlet / outlet 603, and the upper end surface of the guide block 63 is an arc surface. Integral forming can simplify the mold, reduce costs, and improve production efficiency.

[0037] The above embodiments are only preferred embodiments of the present invention, and do not limit the protection scope of the present invention accordingly. Therefore, all equivalent changes made according to the structure, shape, and principle of the present invention should be covered within the protection scope defined by the claims of the present invention.

Claims

1. A chain guide structure of a loop-chain type intelligent hoist, comprising a hoist housing (1), a driving device (2) is arranged inside the hoist housing (1), the driving device (2) includes a driving shaft (201), one end of the driving shaft (201) is fixedly connected to a sprocket (3), and it is characterized in that: A fixed seat (5) is fixedly arranged inside the elevator housing (1). The fixed seat (5) is located below the sprocket (3). A passage groove (501) is arranged on the fixed seat (5). A chain guide (6) is sleeved on the outer periphery of the sprocket (3). A chain guide channel is provided inside the chain guide (6). The chain guide channel includes an arc channel (601) and a first inlet / outlet (602) and a second inlet / outlet (603) that are directly communicated with both ends of the arc channel (601). A support block (604) protrudes axially along the outer side of the upper end of the chain guide (6). A support groove (101) that is spliced and matched with the support block (604) is arranged inside the elevator housing (1). The first inlet / outlet (602) and the second inlet / outlet (603) are located at the lower part of the chain guide (6). The lower part of the chain guide (6) is in clearance fit with the passage groove (501). One end of the chain guide (6) located at the second inlet / outlet (603) protrudes downward to form a guiding part (605). The guiding part (605) extends out of the lower end of the passage groove (501). The sprocket (3) has six teeth (301). An oval tooth socket (302) is provided between two adjacent teeth (301). A strip-shaped tooth socket (303) that communicates two adjacent oval tooth sockets (302) is arranged in the middle of one tooth (301). The first inlet / outlet (602) includes a first transverse channel (6021) and a first longitudinal channel (6022) that are in a cross shape. The second inlet / outlet (603) includes a second transverse channel (6031) and a second longitudinal channel (6032) that are in a cross shape. The minimum distance H1 between the first transverse channel (6021) and the second transverse channel (6031) is greater than or equal to the minimum distance H2 between two opposite strip-shaped tooth sockets (303).

2. The chain guide structure of a loop chain type intelligent hoist according to claim 1, characterized in that: One side of the first transverse channel (6021) close to the second transverse channel (6031) has a straight first guiding groove (6023). One side of the second transverse channel (6031) close to the first transverse channel (6021) has a straight second guiding groove (6033). The distance between the groove bottom surface of the first guiding groove (6023) and the groove bottom surface of the second guiding groove (6033) is the minimum distance between the first transverse channel (6021) and the second transverse channel (6031).

3. The chain guide structure of a loop chain type intelligent hoist according to claim 1 or 2, characterized in that: One side of the second transverse channel (6031) away from the first transverse channel (6021) has a first arc-shaped guiding groove (6034). The first arc-shaped guiding groove (6034) is located inside the guiding part (605). The first arc-shaped guiding groove (6034) increases gradually from top to bottom.

4. The chain guide structure of a loop chain type intelligent hoist according to claim 3, characterized in that: One side of the second longitudinal channel (6032) has a second arc-shaped guiding groove (6035). The second arc-shaped guiding groove (6035) is located inside the guiding part (605). The second arc-shaped guiding groove (6035) increases gradually from top to bottom.

5. The chain guide structure of a loop chain type intelligent hoist according to claim 1, characterized in that: The chain guide (6) includes a left housing (61) and a right housing (62). The support block (604) is located at the upper end of the left housing (61). The left housing (61) and the right housing (62) are fixed by fasteners. The chain guide channel is formed between the left housing (61) and the right housing (62).

6. The chain guide structure of a loop chain type intelligent hoist according to claim 5, characterized in that: A guiding block (63) is integrally formed on the left housing (61). The guiding block (63) is located between the first inlet / outlet (602) and the second inlet / outlet (603). The upper end surface of the guiding block (63) is an arc surface, which is located within the strip-shaped tooth socket (303) but does not contact the strip-shaped tooth socket (303).

7. The chain guide structure of a loop chain type intelligent hoist according to claim 1, characterized in that: The chain guide (6) includes an upper housing (64) and a lower housing (65). The support block (604) and the arc channel (601) are located in the upper housing (64), and the first inlet / outlet (602) and the second inlet / outlet (603) are located in the lower housing (65). A guiding block (63) is formed between the first inlet / outlet (602) and the second inlet / outlet (603), and the upper end surface of the guiding block (63) is an arc surface.

8. The chain guiding structure of a loop chain type intelligent hoist according to claim 1, characterized in that: The chain guide (6) is formed of cast iron material.

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