Double-outlet-chain hydraulic hoist

Abstract

The double-output-chain hydraulic hoist comprises a supporting bottom plate, a driving device and a brake, the supporting bottom plate is provided with a first shell, two chain wheel shells are arranged in the first shell, each chain wheel shell is provided with a chain wheel and a chain driven by the chain wheel to go in and out of the chain wheel shell, and one side of each chain wheel is provided with a first gear; the driving device is assembled on one side of the first shell through a first flange plate and comprises a driver and a speed reducer; the speed reducer comprises an input shaft connected to the output end of the driver, an output shaft connected to the input shaft through a transmission assembly, a second gear connected to the output shaft, and a third gear arranged on the periphery of the first gear in a sleeving mode and meshed with the second gear. The fourth gear is arranged on the periphery of the other first gear in a sleeving mode and meshed with the second gear through an inertia gear, synchronous operation of the two lifting chains on the two sides can be achieved, a lifted object is synchronously lifted, and the problem that a traditional lifting beam is unstable due to the fact that two hydraulic hoists are adopted for lifting the object is solved.

Description

Technical Field

[0001] The invention relates to the technical field of hydraulic hoists, and in particular to a double-chain hydraulic hoist. Background Art

[0002] The explosion-proof diesel engine monorail crane locomotive for coal mines is an auxiliary transportation equipment used in coal mines. Its working efficiency and service life are very important. The lifting beam is an indispensable equipment for monorail crane auxiliary transportation. The hydraulic hoist is the main component of the lifting beam, and the hydraulic hoist is used to lift the object.

[0003] At present, most of the lifting beams are lifted by two or more hydraulic hoists. A single hydraulic hoist cannot complete the lifting task, and the two hydraulic hoists can only control the movements individually, making synchronous movements difficult and inefficient.

[0004] Therefore, how to provide a double-chain hydraulic hoist to at least partially solve the above-mentioned drawbacks is a technical problem that technical personnel in this field currently need to solve. Summary of the invention

[0005] The purpose of the present invention is to provide a double-chain hydraulic hoist, which can realize the synchronous operation of two lifting chains on both sides and synchronously lift the hoisted object, thereby overcoming the problem of instability of traditional lifting beams using two hydraulic hoists to lift objects. It is faster, more efficient, and safer, and can reduce the number of drivers and reduce production costs.

[0006] To achieve the above object, the present invention provides a double-chain hydraulic hoist, comprising:

[0007] The support bottom plate is provided with a first housing, two sprocket housings are provided in the first housing, the sprocket housings are provided with sprockets and chains driven by the sprockets to enter and exit the sprocket housings, and one side of the two sprockets is provided with a first gear;

[0008] A driving device is assembled on one side of the first housing through a first flange, the driving device includes a driver and a reducer, the reducer includes an input shaft connected to an output end of the driver, an output shaft connected to the input shaft through a transmission assembly, a second gear connected to the output shaft, a third gear sleeved on an outer periphery of a first gear and meshed with the second gear, and a fourth gear sleeved on an outer periphery of another first gear and meshed with the second gear through an idler gear;

[0009] The brake is connected to the input shaft and is capable of limiting the rotation of the input shaft.

[0010] Preferably, the first housing is provided with a first mounting hole and a first through hole spaced apart from each other;

[0011] The sprocket housing is provided with a second mounting hole corresponding to the first mounting hole, and a second through hole corresponding to the first through hole. A first pin shaft is provided in the second through hole of the first through hole. The first connecting member is passed through the corresponding first mounting hole and second mounting hole to relatively fix the sprocket housing and the first housing.

[0012] Preferably, it also includes a limit plate, the limit plate is provided with a third through hole and an abutment portion, the abutment portion is located at an end of the limit plate away from the third through hole, and the abutment portion is provided with an arcuate surface facing the sprocket, the third through hole is used for the first pin shaft to pass through, the sprocket housing is provided with a receiving groove for accommodating the limit plate, the middle part of the sprocket in the axial direction is provided with an annular groove for the chain to move, the abutment portion extends into the annular groove, and there is a first gap between the arcuate surface and the bottom surface of the annular groove.

[0013] Preferably, there is a second gap between the accommodating groove and the sprocket, and the limiting plate also includes two wing pieces arranged on both sides of the abutting portion, the two wing pieces are located in the second gap and extend toward the chain direction, and the two wing pieces are opposite to each other and are provided with guide surfaces that can contact and guide the chain.

[0014] Preferably, an intermediate housing is provided on a side of the first housing facing away from the first flange;

[0015] The driver includes a rotating shaft and a driving gear sleeved on the rotating shaft and located inside the first flange;

[0016] The input shaft includes a spline shaft, a driven gear sleeved on the spline shaft and meshed with the driving gear, and the spline shaft includes a first end and a second end penetrating the first housing and extending to the intermediate housing.

[0017] Preferably, the transmission assembly is arranged in the intermediate housing, and comprises a primary driving gear connected to the second end through a coupling, a primary driven gear meshed with the primary driving gear, and a secondary driving gear coaxially arranged with the primary driven gear;

[0018] The output shaft is provided with a secondary driven gear, and the secondary driven gear is coaxially arranged with the second gear to drive the second gear to rotate.

[0019] Preferably, the third gear and the fourth gear both include an inner ring gear and an outer ring gear, the inner ring gear of the third gear is meshed with the corresponding first gear, and the outer ring gear of the third gear is meshed with the second gear, the inner ring gear of the fourth gear is meshed with the corresponding first gear, and the outer ring gear of the fourth gear is meshed with the idler gear.

[0020] Preferably, a second flange is provided on a side of the first flange away from the first housing, and the second flange is used to mount the driver and the brake;

[0021] The brake comprises a third flange connected to the second flange, a brake cylinder connected to the third flange, and a brake end cover assembly connected to the brake cylinder;

[0022] The brake end cap assembly includes:

[0023] A fourth flange is installed on a side of the brake cylinder away from the third flange, and a first bearing is arranged inside the fourth flange;

[0024] a brake end cover connected to the fourth flange to seal the first bearing;

[0025] The brake spline pin is connected to the first end, and the brake spline pin is provided with a bearing installation position and a brake spline sleeve located in the brake cylinder, and the bearing installation position is used for installing and positioning the first bearing.

[0026] Preferably, a disc spring extending into the brake cylinder is installed on a side of the third flange away from the second flange;

[0027] A friction plate and a brake piston are provided inside the brake cylinder. The friction plate includes an inner friction plate meshed with the outer periphery of the brake spline sleeve and an outer friction plate meshed with the inner wall of the brake cylinder, and the inner friction plate and the outer friction plate can rotate relative to each other. The brake piston is used for abutting against a disc spring to press the outer friction plate and the inner friction plate for braking the spline pin shaft and the spline shaft.

[0028] Preferably, the driver is a hydraulic motor, the hydraulic motor is provided with an oil port for oil inlet and outlet, and the outer periphery of the brake cylinder is provided with a connecting port;

[0029] The driving device also includes a hydraulic module, which is connected to the oil port through a first pipeline to drive the hydraulic motor to operate. The hydraulic module is connected to the connecting port through a second pipeline so that the oil entering between the brake cylinder and the brake piston along the connecting port pushes the brake piston to move in a direction away from the friction plate.

[0030] Compared with the above-mentioned background technology, the double-chain hydraulic hoist provided by the present invention includes a supporting base plate, a driving device and a brake. The supporting base plate is provided with a first shell, and two sprocket shells are provided in the first shell. The sprocket shells are provided with sprockets and chains driven by the sprockets to enter and exit the sprocket shells, and one side of the two sprockets is provided with a first gear; the driving device is assembled on one side of the first shell through a first flange, and the driving device includes a driver and a reducer. The reducer includes an input shaft connected to the output end of the driver, an output shaft connected to the input shaft through a transmission assembly, a second gear connected to the output shaft, a third gear sleeved on the outer periphery of a first gear and meshed with the second gear, and a fourth gear sleeved on the outer periphery of another first gear and meshed with the second gear through an idle gear; the brake is connected to the input shaft and can limit the rotation of the input shaft.

[0031] Specifically, two sprocket housings are installed in the first housing for setting two sprockets and two chains. The driver can drive the input shaft of the reducer to rotate, and transmit power to the second gear on the output shaft through the transmission assembly. The third gear and the fourth gear respectively mounted on the two first gears are rotated simultaneously through the meshing second gear and the idle gear. The rotation direction of the fourth gear is changed by the idle gear so that the two sprockets can synchronously retract and release the chains. The brake can brake the rotation of the input shaft to stop the sprockets from retracting and releasing the chains. With this arrangement, the synchronous operation of the two lifting chains on both sides can be achieved, and the objects to be lifted can be lifted synchronously, which overcomes the problem of instability of the traditional lifting beam using two hydraulic hoists to lift objects. It is faster, more efficient and safer. At the same time, only one driver is used, which reduces the number of drivers and reduces production costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying creative work.

[0033] Figure 1 A schematic diagram of the structure of a double-chain hydraulic hoist provided in an embodiment of the present invention;

[0034] Figure 2 for Figure 1 A top view of

[0035] Figure 3 for Figure 2 Sectional view along AA;

[0036] Figure 4 for Figure 1 The main view;

[0037] Figure 5 for Figure 4 Sectional view along BB;

[0038] Figure 6 A schematic diagram of the structure of a first shell provided by an embodiment of the present invention;

[0039] Figure 7 An exploded view of a double-chain hydraulic hoist provided in an embodiment of the present invention;

[0040] Figure 8 An exploded diagram of a driving device provided by an embodiment of the present invention;

[0041] Fig. 9An exploded view of a transmission assembly provided by an embodiment of the present invention;

[0042] Fig.10 An exploded view of a brake provided by an embodiment of the present invention;

[0043] Fig.11 An exploded view of a brake end cover assembly provided by an embodiment of the present invention;

[0044] Fig.12 An exploded view of a hydraulic module provided in an embodiment of the present invention.

[0045] in:

[0046] 100-supporting bottom plate;

[0047] 200-first housing, 210-sprocket housing, 211-second mounting hole, 212-second through hole, 213-first pin shaft, 214-first connecting member, 215-accommodating groove, 220-sprocket, 221-first gear, 222-second bearing, 230-chain, 240-first mounting hole, 250-first through hole, 260-intermediate housing, 270-cover plate;

[0048] 300-first flange, 310-second flange;

[0049] 400-driver, 410-driving gear, 420-oil port;

[0050] 510-input shaft, 511-spline shaft, 512-driven gear, 513-first end, 514-second end, 515-coupling, 516-first driving gear, 517-first driven gear, 518-second driving gear, 521-second gear, 522-second driven gear, 530-third gear, 540-idle gear, 550-fourth gear;

[0051] 600-brake, 610-third flange, 611-disc spring, 620-brake cylinder, 621-brake piston, 622-inner friction plate, 623-outer friction plate, 624-connecting port, 630-brake end cover assembly, 631-fourth flange, 632-first bearing, 633-brake end cover, 634-brake spline pin, 635-brake spline sleeve, 636-first elastic retaining ring, 637-circlip, 638-second elastic retaining ring;

[0052] 700-limiting plate, 710-third through hole, 720-abutting portion, 721-arc-shaped surface, 722-wing piece;

[0053] 800-hydraulic module, 810-second pipeline, 820-integrated block, 830-relief valve, 840-balancing valve, 850-elbow, 860-shuttle valve, 870-thread plug, 880-butt joint. DETAILED DESCRIPTION

[0054] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0055] In order to enable those skilled in the art to better understand the scheme of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0056] In the description of the present invention, it should be understood that the terms "inside", "outside", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the position or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore should not be understood as a limitation of the present invention.

[0057] The purpose of the present invention is to provide a double-chain hydraulic hoist, which can realize the synchronous operation of two lifting chains 230 on both sides and synchronously lift the hoisted objects, thereby overcoming the problem of instability of traditional lifting beams using two hydraulic hoists to lift objects. It is faster, more efficient, and safer, and can reduce the number of drivers 400, thereby reducing production costs.

[0058] See also Figures 1 to 8 To achieve the above-mentioned purpose, the present invention provides a double-chain hydraulic hoist, including a supporting base plate 100, a driving device and a brake 600.

[0059] The supporting base plate 100 is provided with a first shell 200, and two sprocket shells 210 are provided in the first shell 200. The sprocket shells 210 are each provided with a sprocket 220, and a chain 230 driven by the sprocket 220 to enter and exit the sprocket shell 210. A first gear 221 is provided on one side of the two sprockets 220, and the first gear 221 is located on the outside of the first shell 200. A hole is opened in the middle of the sprocket shell 210 for assembling the sprocket 220. A second bearing 222 is provided between the sprocket 220 and the sprocket shell 210 for the rotation of the sprocket 220 relative to the sprocket shell 210.

[0060] The driving device is assembled on one side of the first housing 200 through the first flange 300. The driving device includes a driver 400 and a reducer. The reducer includes an input shaft 510 connected to the output end of the driver 400, an output shaft connected to the input shaft 510 through a transmission assembly, a second gear 521 connected to the output shaft, a third gear 530 sleeved on the outer periphery of one first gear 221 and meshed with the second gear 521, and a fourth gear 550 sleeved on the outer periphery of another first gear 221 and meshed with the second gear 521 through an idler gear 540. The idler gear 540 can change the first gear 221. The rotation direction of the four gears 550, for example, when the second gear 521 rotates clockwise, it drives the third gear 530 and the idler gear 540 to rotate counterclockwise, so that the fourth gear 550 rotates clockwise. The idler gear 540 only changes the rotation direction of the fourth gear 550, so that the third gear 530 and the fourth gear 550 rotate in opposite directions at the same time. The brake 600 is connected to the input shaft 510 and can limit the rotation of the input shaft 510. The lifting torque is increased by the deceleration of the reducer, and the synchronous lifting function on both sides is realized through the idler gear 540 in the reducer. The operation is simple and reliable.

[0061] Two sprocket housings 210 are installed in the first housing 200 for setting two sprockets 220 and two chains 230. The driver 400 can drive the input shaft 510 of the reducer to rotate, and transmit the power to the second gear 521 on the output shaft through the transmission assembly. Through the meshing second gear 521 and the idle gear 540, the third gear 530 and the fourth gear 550 respectively mounted on the two first gears 221 can rotate simultaneously, and the rotation direction of the fourth gear 550 can be changed through the idle gear 540. The two sprockets 220 can synchronously retract and extend the chain 230, and the brake 600 can brake the rotation of the input shaft 510 to stop the sprocket 220 from retracting and extending the chain 230. Such an arrangement can achieve synchronous operation of the two lifting chains 230 on both sides and synchronous lifting of the lifted object, overcoming the problem of instability in lifting objects with two hydraulic hoists in the traditional lifting beam, with faster speed, higher efficiency and greater safety. At the same time, only one driver 400 is used, which reduces the number of drivers 400 and reduces production costs.

[0062] It can be understood that the first shell 200 is provided with a first mounting hole 240 and a first through hole 250 spaced apart from each other, the sprocket shell 210 is provided with a second mounting hole 211 corresponding to the first mounting hole 240, and a second through hole 212 corresponding to the first through hole 250, a first pin shaft 213 is provided in the second through hole 212 of the first through hole 250, and a first connecting member 214 is passed through the corresponding first mounting hole 240 and the second mounting hole 211 to relatively fix the sprocket shell 210 and the first shell 200, and the first connecting member 214 can be a bolt, etc., which can achieve the above-mentioned purpose.

[0063] It should be noted that the double-chain hydraulic hoist also includes a limit plate 700, which is provided with a third through hole 710 and an abutment portion 720. The abutment portion 720 is located at the end of the limit plate 700 away from the third through hole 710, and the abutment portion 720 is provided with an arcuate surface 721 facing the sprocket 220. The third through hole 710 is used for the first pin shaft 213 to pass through, and the sprocket housing 210 is provided with a receiving groove 215 for accommodating the limit plate 700. The middle part of the sprocket 220 in the axial direction is provided with an annular groove for the chain 230 to move. The abutment portion 720 extends into the annular groove, and there is a first gap between the arcuate surface 721 and the bottom surface of the annular groove.

[0064] Typically, an annular groove is provided on the outer periphery of the sprocket 220, and the annular groove is located in the middle axial portion of the sprocket 220, so as to drag the chain 230 to move smoothly with the rotation of the sprocket 220. The limiting plate 700 positioned in the accommodating groove 215 by the first pin shaft 213 has an abutment portion 720 that can extend into the annular groove. A first gap exists between the arc surface 721 of the abutment portion 720 and the bottom surface of the annular groove, which does not affect the rotation of the sprocket 220 and can limit the axial movement of the sprocket 220.

[0065] In addition, there is a second gap between the accommodating groove 215 and the sprocket 220, and the limiting plate 700 also includes two wing pieces 722 arranged on both sides of the abutting portion 720. The two wing pieces 722 are located in the second gap and extend toward the chain 230. The two wing pieces 722 are opposite to each other and are provided with guide surfaces that can contact and guide the chain 230, which can avoid the wear of the chain 230 when it moves between the sprocket 220 and the sprocket housing 210 in a loose state, thereby improving the service life of the chain 230.

[0066] See also Fig. 9 In this embodiment, an intermediate housing 260 is provided on a side of the first housing 200 away from the first flange 300; the driver 400 includes a rotating shaft, and a driving gear 410 sleeved on the rotating shaft and located inside the first flange 300; the input shaft 510 includes a spline shaft 511, a driven gear 512 sleeved on the spline shaft 511 and meshed with the driving gear 410, the spline shaft 511 includes a first end 513, and a second end 514 penetrating the first housing 200 and extending to the intermediate housing 260, the transmission assembly is arranged in the intermediate housing 260, including a primary driving gear 516 connected to the second end 514 through a coupling 515, a primary driven gear 517 meshed with the primary driving gear 516, and a secondary driving gear 518 coaxially arranged with the primary driven gear 517; the output shaft is provided with a secondary driven gear 522, and the secondary driven gear 522 is coaxially arranged with the second gear 521 to drive the second gear 521 to rotate.

[0067] The third gear 530 and the fourth gear 550 both include an inner gear ring and an outer gear ring. The inner gear ring of the third gear 530 meshes with the teeth on the outer periphery of the corresponding first gear 221, and the outer gear ring of the third gear 530 meshes with the second gear 521. The inner gear ring of the fourth gear 550 meshes with the corresponding first gear 221, and the outer gear ring of the fourth gear 550 meshes with the idler gear 540. In this way, the power output by the driver 400 is transmitted step by step to the first gear 221, so that the sprocket 220 rotates to drive the chain 230 to retract and release. The spline shaft 511 is passed through the first housing 200, so that the transmission assembly can be centrally assembled in the intermediate housing 260 on one side of the first housing 200, saving the volume of the entire double-chain hydraulic hoist. A cover plate 270 is installed on the side of the intermediate housing 260 away from the first housing 200 to seal the transmission assembly.

[0068] See also Fig.10 and Fig.11 A second flange 310 is provided on the side of the first flange 300 facing away from the first shell 200, and the second flange 310 is used to install the driver 400 and the brake 600; the brake 600 includes a third flange 610 connected to the second flange 310, a brake cylinder 620 connected to the third flange 610, and a brake end cover assembly 630 connected to the brake cylinder 620; the brake end cover assembly 630 includes a fourth flange 631, a brake end cover 633 and a brake spline pin 634. The fourth flange 631 is installed on the side of the brake cylinder 620 away from the third flange 610, and the first bearing 632 is provided inside the fourth flange 631; the brake end cover 633 is connected to the fourth flange 631 to seal the first bearing 632; the brake spline pin 634 is connected to the first end 513 of the spline shaft 511, and the brake spline pin 634 is provided with a bearing mounting position, and a brake spline sleeve 635 located in the brake cylinder 620, and the bearing mounting position is used for installing and positioning the first bearing 632.

[0069] Among them, a first elastic retaining ring 636 is installed in the fourth flange 631 to tighten the outer ring of the first bearing 632 and axially limit the first bearing 632. A brake spline sleeve 635 installation position is provided on the brake spline pin 634. The brake spline sleeve 635 is pressed and assembled on the brake spline sleeve 635 installation position through the second elastic retaining ring 638. At the same time, a retaining spring 637 is installed on the side of the brake spline sleeve 635 away from the second elastic retaining ring 638 to axially limit the brake spline sleeve 635.

[0070] It should be noted that a disc spring 611 extending into the interior of the brake cylinder 620 is installed on the side of the third flange 610 facing away from the second flange 310; a friction plate and a brake piston 621 are provided inside the brake cylinder 620, and the friction plate includes an inner friction plate 622 meshed with the outer periphery of the brake spline sleeve 635 and an outer friction plate 623 meshed with the inner wall of the brake cylinder 620, and the inner friction plate 622 and the outer friction plate 623 can rotate relative to each other, and the brake piston 621 is used for the disc spring 611 to abut against, so as to press the outer friction plate 623 and the inner friction plate 622, and is used for braking the spline pin 634 and the spline shaft 511.

[0071] The outer friction plate 623 is assembled on the inner wall of the brake cylinder 620 and cannot rotate relative to the brake cylinder 620. The inner friction plate 622 is assembled on the outer periphery of the brake spline sleeve 635 and can rotate synchronously with the brake spline sleeve 635. The disc spring 611 contacts the brake piston 621, pushes the brake piston 621 to move toward the friction plate and presses the outer friction plate 623 and the inner friction plate 622, so that the outer friction plate 623 and the inner friction plate 622 cannot rotate relative to each other due to the friction factor, and are in a braking state. When the brake piston 621 moves in the opposite direction to compress the disc spring 611, the brake piston 621 does not contact the friction plate, and the friction force that restricts the outer friction plate 623 and the inner friction plate 622 from rotating relative to each other disappears. When the brake spline sleeve 635 rotates, it can drive the inner friction plate 622 to rotate relative to the outer friction plate 623, and the braking state is released.

[0072] See also Fig.12 The driver 400 is specifically a hydraulic motor, which is provided with an oil port 420 for the oil to enter and exit, and a connecting port 624 is provided on the periphery of the brake cylinder 620; the driving device also includes a hydraulic module 800, which is connected to the oil port 420 through a first pipeline to drive the hydraulic motor to operate, and the hydraulic module 800 is connected to the connecting port 624 through a second pipeline 810, so that the oil that enters between the brake cylinder 620 and the brake piston 621 along the connecting port 624 pushes the brake piston 621 to move in a direction away from the friction plate.

[0073] The hydraulic module 800 also includes an integrated block 820, a balancing valve 840, a relief valve 830, a docking joint 880, a plug 870, an elbow 850, a shuttle valve 860, etc. The relief valve 830 is used for overload protection of the two oil ports 420 of the hydraulic motor, thereby protecting the chain 230 from overload. The balancing valve 840 is used for stabilizing braking. The balancing valve 840 can be replaced by a combination of a hydraulic lock and a throttle valve to achieve the above-mentioned purpose.

[0074] It should be noted that, in this specification, relational terms such as first and second are merely used to distinguish one entity from other entities, but do not necessarily require or imply any actual relationship or order between these entities.

[0075] The various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.

[0076] The principles and implementation methods of the present invention are described in this article using specific examples. The description of the above embodiments is only used to help understand the method and core ideas of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made to the present invention without departing from the principles of the present invention, and these improvements and modifications also fall within the scope of protection of the present invention.

Claims

1. A double-chain hydraulic hoist, characterized in that: include: The support base plate is provided with a first housing, wherein two sprocket housings are provided in the first housing, each of the sprocket housings is provided with a sprocket and a chain driven by the sprocket to enter and exit the sprocket housing, and each side of the two sprockets is provided with a first gear; A driving device, assembled on one side of the first housing through a first flange, the driving device comprising a driver and a reducer, the reducer comprising an input shaft connected to an output end of the driver, an output shaft connected to the input shaft through a transmission assembly, a second gear connected to the output shaft, a third gear sleeved on an outer periphery of one of the first gears and meshed with the second gear, and a fourth gear sleeved on an outer periphery of another of the first gears and meshed with the second gear through an idler gear; The brake is connected to the input shaft and is capable of limiting the rotation of the input shaft.

2. The double-chain hydraulic hoist according to claim 1, characterized in that: The first shell is provided with a first mounting hole and a first through hole spaced apart from each other; The sprocket housing is provided with a second mounting hole corresponding to the first mounting hole, and a second through hole corresponding to the first through hole, a first pin shaft is provided in the second through hole of the first through hole, and a first connecting member is passed through the corresponding first mounting hole and the second mounting hole to relatively fix the sprocket housing and the first housing.

3. The double-chain hydraulic hoist according to claim 2, characterized in that: The sprocket wheel further comprises a chain linking member which is configured to extend the length of the chain linking member and to provide a plurality of sprocket wheels having ...

4. The double-chain hydraulic hoist according to claim 3, characterized in that: There is a second gap between the accommodating groove and the sprocket, and the limiting plate also includes two wing pieces arranged on both sides of the abutting portion, the two wing pieces are located in the second gap and extend toward the chain direction, and the two wing pieces are opposite to each other and are provided with guide surfaces that can contact and guide the chain.

5. The double-chain hydraulic hoist according to any one of claims 1 to 4, characterized in that: An intermediate housing is provided on a side of the first housing facing away from the first flange; The driver comprises a rotating shaft, and a driving gear sleeved on the rotating shaft and located inside the first flange; The input shaft includes a spline shaft, a driven gear sleeved on the spline shaft and meshed with the driving gear, and the spline shaft includes a first end and a second end penetrating the first housing and extending to the intermediate housing.

6. The double-chain hydraulic hoist according to claim 5, characterized in that: The transmission assembly is arranged in the intermediate housing, and comprises a primary driving gear connected to the second end through a coupling, a primary driven gear meshed with the primary driving gear, and a secondary driving gear coaxially arranged with the primary driven gear; The output shaft is provided with a secondary driven gear, and the secondary driven gear is coaxially arranged with the second gear to drive the second gear to rotate.

7. The double-chain hydraulic hoist according to claim 5, characterized in that: The third gear and the fourth gear both include an inner gear ring and an outer gear ring, the inner gear ring of the third gear is meshed with the corresponding first gear, and the outer gear ring of the third gear is meshed with the second gear, the inner gear ring of the fourth gear is meshed with the corresponding first gear, and the outer gear ring of the fourth gear is meshed with the idler gear.

8. The double-chain hydraulic hoist according to claim 5, characterized in that: A second flange is provided on a side of the first flange away from the first housing, and the second flange is used for mounting the driver and the brake; The brake comprises a third flange connected to the second flange, a brake cylinder connected to the third flange, and a brake end cover assembly connected to the brake cylinder; The brake end cover assembly comprises: a fourth flange, mounted on a side of the brake cylinder away from the third flange, wherein a first bearing is disposed inside the fourth flange; a brake end cover connected to the fourth flange to seal the first bearing; A brake spline pin is connected to the first end, and a bearing mounting position and a brake spline sleeve located in the brake cylinder are provided on the brake spline pin. The bearing mounting position is used for installing and positioning the first bearing.

9. The double-chain hydraulic hoist according to claim 8, characterized in that: A disc spring extending into the interior of the brake cylinder is installed on a side of the third flange away from the second flange; A friction plate and a brake piston are provided inside the brake cylinder. The friction plate includes an inner friction plate meshed with the outer periphery of the brake spline sleeve and an outer friction plate meshed with the inner wall of the brake cylinder, and the inner friction plate and the outer friction plate can rotate relative to each other. The brake piston is used for the disc spring to abut against the outer friction plate and the inner friction plate to brake the brake spline pin shaft and the spline shaft.

10. The double-chain hydraulic hoist according to claim 9, characterized in that: The driver is specifically a hydraulic motor, the hydraulic motor is provided with an oil port for oil inlet and outlet, and the outer periphery of the brake cylinder is provided with a connecting port; The driving device also includes a hydraulic module, which is connected to the oil port through a first pipeline to drive the hydraulic motor to operate. The hydraulic module is connected to the connecting port through a second pipeline so that the oil entering between the brake cylinder and the brake piston along the connecting port pushes the brake piston to move in a direction away from the friction plate.

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