Double-speed multipurpose winch of small-tooth-difference planetary gear train speed change mechanism

Abstract

The utility model discloses a double-speed multipurpose winch with a planetary gear train speed change mechanism. The double-speed multipurpose winch is formed by connecting the planetary gear train speed change mechanism with a gear reduction mechanism. In the speed change mechanism, the rotating speed of an inner gear ring is changed by shifting a handle to achieve high-low gear speed switching of the winch, when a connecting rod is located at the position a, a sliding block, the inner gear ring and a fixed connecting frame are regarded as the same component, the rotating speed is zero, and the winch is in a low-speed gear. When the connecting rod is located at the position b, the sliding block, the inner gear ring and the center wheel in the speed change mechanism are regarded as the same component with the same rotating speed, the transmission ratio of the speed change mechanism is 1, and the winch is in a high-speed gear. The gear reduction mechanism is composed of a small-tooth-difference planetary gear train fixed by an inner gear ring and a fixed shaft gear train or a small-tooth-difference planetary gear train fixed by a pin or a planetary gear train and a small-tooth-difference planetary gear train fixed by a pin, and an output component of the fixed shaft inner gear ring or a small-tooth-difference inner gear ring is directly connected with a winding drum externally connected to a speed reducer shell. The transmission is simple in structure, large in transmission ratio variable range and small in occupied area.

Description

Technical Field

[0001] The utility model relates to a double-speed transmission device and method, in particular to a double-speed multi-purpose winch of a small-tooth-difference planetary gear train speed change mechanism suitable for a double-speed machine. Background Art

[0002] At present, JSDB series two-speed multi-purpose winches are widely used in coal mines. Although they can complete the recovery of pillars or dispatching, pulling heavy objects in the tunnel, and have the functions of slow column return winch and fast dispatching and transport winch, they have the disadvantages of complex structure, large footprint, heavy weight, large installation chamber, difficult moving, low transmission efficiency, etc., because they use motor + multi-stage fixed axis reducer + drum, multi-stage fixed axis reducer, in which the slow speed is composed of six pairs of fixed axis gear meshing transmission, and the fast speed is composed of four pairs of fixed axis gear meshing transmission. Therefore, it is necessary to develop a two-speed multi-purpose winch with the advantages of simple structure, small footprint, light weight, small installation chamber, convenient winch moving, high efficiency, etc. Summary of the invention

[0003] Technical problem: The purpose of this utility model is to overcome the shortcomings of the prior art and provide a two-speed multi-purpose winch with a planetary gear train speed change mechanism with a small tooth difference and a simple structure, small footprint, light weight, small installation chamber, convenient winch moving, and high efficiency.

[0004] Technical solution: In order to overcome the shortcomings of the above two winches, the utility model discloses a dual-speed multi-purpose winch with a small-tooth-difference planetary gear train speed change mechanism, including a motor, a coupling, a drum, and also includes three modes: "dual-speed + small-tooth-difference planetary with fixed inner gear ring + fixed-axis reduction", "dual-speed + small-tooth-difference planetary reduction with fixed pin", or "dual-speed + first-level planetary + small-tooth-difference planetary reduction with fixed pin".

[0005] Mode 1: The "dual-speed + small-tooth-difference planetary gear with fixed inner gear ring + fixed-axis reduction" mode includes a two-speed planetary gear train arranged in the reel, a small-tooth-difference planetary gear train with fixed inner gear ring, and a fixed-axis gear train connected to the rear of the reel; the two-speed planetary gear train includes a two-speed center wheel, a two-speed planetary gear set, a two-speed planetary carrier, a two-speed inner gear ring, a fixed frame, a slider, a connecting frame, and a handle; the two-speed center wheel is a stepped shaft arranged in large, small, and medium diameters, the large-diameter shaft section is connected to the motor output shaft through a coupling, and the medium-diameter shaft section is connected to the motor output shaft through a coupling. The segment is a shaft gear, and part of the shaft gear is meshed with the inner gear ring of the two-speed planetary gear set; the slider is mounted on the small diameter shaft segment in the middle of the two-speed center wheel, a groove is arranged on the outer circumference of the left side of the slider, an outer gear ring is arranged on the outer circumference of the right side of the slider, which is meshed with the inner gear ring on the left side of the two-speed inner gear ring, and the inner hole on the right side of the slider is provided with an inner gear ring that can mesh with another part of the gear teeth of the two-speed center wheel. The left end face of the fixed frame is fixed to the motor, and the right side is mounted on the coupling through a bearing, and the middle part of the fixed frame is provided with two fixed handles Position a and b holes; the handle is fixedly connected with a towing hook hooked in the outer circumferential groove on the left side of the slider; the left end face of the connecting frame is connected to the right end face of the fixing frame, and the front part of the connecting frame is provided with a supporting plate fixedly connected to the left end of the reel through the second bearing set, and the supporting plate is supported on the connecting frame through the second bearing; the outer gear ring of the two-speed planetary gear set is meshed with the inner gear ring on the right side of the two-speed inner gear ring, and the two-speed inner gear ring is provided with a bearing three fixed on the connecting frame, and the two-speed planetary gear set is arranged on the two-speed planetary carrier through the fourth bearing, and the two-speed planetary The right end of the frame is provided with a T-shaped output shaft which connects the two-speed planetary gear train and the small-tooth-difference planetary gear train as one; the motor is supported on the ground via the left bracket; when the winch is required to be in low-speed gear for work, the slider is moved to position a by the handle, the slider is engaged with the connecting frame and disengaged from the two-speed center wheel, and the speed of the two-speed inner gear ring is zero at this time; when the winch is required to be in high-speed gear for work, the slider is moved to position b, the slider is engaged with the two-speed center wheel and disengaged from the connecting frame, and the speeds of the two-speed center wheel and the two-speed inner gear ring are the same;

[0006] Mode 2, the "dual speed + small tooth difference planetary reduction" mode, includes the "dual speed planetary gear system" + small tooth difference planetary reduction mode in "dual speed + small tooth difference planetary + fixed shaft reduction" in Mode 1, and the small tooth difference planetary reduction mode is a small tooth difference planetary gear system of "fixed small tooth difference pin, small tooth difference internal gear ring output"; that is: the shaft on the right side of the two-speed planetary carrier is processed into a T-shaped output shaft with a keyway, which is connected to the hole of the eccentric shaft sleeve through a key, and the right side of the pin is fixed to the right side boss type matching surface through a shaft shoulder, and the right side boss type matching surface is directly fixed to the connecting frame through screws to achieve the fixation of the pin, and the small tooth difference planetary gear is directly meshed with the small tooth difference internal gear on the right side of the reel for transmission, forming a "dual speed + small tooth difference planetary reduction" mode;

[0007] Mode three, the "dual speed + primary planet + pin-fixed planetary reduction with small tooth difference" mode includes: the "dual speed + pin-fixed planetary reduction with small tooth difference" mode and the primary planetary gear system added between the "dual speed + pin-fixed planetary reduction with small tooth difference" mode, the left side of the primary planetary gear system is connected to the dual-speed planetary carrier, and the right side is connected to the left side of the center wheel shaft processed into a T shape, the shaft on the right side of the primary planetary carrier is processed into a T-shaped center wheel shaft with a keyway and connected to the eccentric shaft sleeve through a key, forming the "dual speed + primary planet + pin-fixed planetary reduction with small tooth difference" mode.

[0008] The "dual speed + small tooth difference planet with fixed inner gear ring + fixed shaft reduction" mode, the small tooth difference planetary gear train is a small tooth difference planetary reduction of "small tooth difference fixed inner gear ring, pin shaft output mode", the small tooth difference planetary gear train includes a small tooth difference planetary gear, an eccentric shaft sleeve, a left boss type matching surface, a right boss type matching surface, a bearing seven, a bearing eight, a pin, a connecting frame, and a center wheel shaft arranged on a T-shaped output shaft; the small tooth difference planetary gear is meshed with the small tooth difference fixed internal gear arranged on the right side of the connecting frame, and the small tooth difference planetary gear is meshed with the small tooth difference fixed internal gear arranged on the right side of the connecting frame. The wheel is supported on the eccentric sleeve through bearing eight, the output shaft with keyway on the right side of the two-speed planetary carrier is connected to the hole of the eccentric sleeve through a key, the left side of the eccentric sleeve is fixed to the output shaft with keyway through a shaft shoulder and the right side through a shaft retaining ring, the column pin passes through the hole of the planetary wheel with small tooth difference, and both sides are fixed to the boss-type matching surfaces on the left and right sides through shaft retaining rings and shoulders, the boss-type matching surfaces on the left and right sides of the column pin are supported on the connecting frame through bearing seven, the boss-type matching surface on the right side is connected to the center wheel shaft with keyway through the left key, and the keyway The center wheel shaft is connected to the hole of the fixed axis center wheel through the right key; the fixed axis gear train includes a fixed axis center wheel, a fixed axis idler wheel group, an idler wheel fixed axis, a fixed axis inner gear ring, a fixed axis, a bearing five, a bearing cover three and a housing; the fixed axis center wheel is meshed with the fixed axis idler wheel group, the fixed axis idler wheel group is supported on the idler wheel fixed axis through the bearing five, the idler wheel fixed axis passes through the hole of the fixed axis, and is fixed to the fixed axis through the shoulder on the right side and the shaft on the left side with an elastic retaining ring; the shaft on the left side of the fixed axis is sealed with the hole of the connecting frame, and the hole on the left side is connected with the keyway A gap is left between the left and right shafts of the T-shaped output shaft, and a seal 2 is provided at the gap. The shaft on the right side of the fixed shaft is circumferentially fixed to the hole of the right bracket by a key; the fixed shaft inner gear ring is meshed with the fixed shaft idler gear set; the left brake disc, the right brake disc and the right plate of the reel are fixed with screws and a sealing gasket is provided at the fitting place, and the right side is fixed with screws to the housing and a sealing gasket is provided at the fitting place; the housing is supported on the fixed shaft by bearing 6, and the bearing cover 3 is fixed to the housing by screws. A gap is left between the bearing cover 3 and the fixed shaft, and a seal 3 is installed at the gap.

[0009] In the described "dual speed + pin-fixed small-tooth-difference planetary reduction" mode, the small-tooth-difference planetary reduction is a small-tooth-difference pin-fixed, small-tooth-difference internal gear ring output mode, and the small-tooth-difference planetary gear train includes a small-tooth-difference planetary gear, an eccentric sleeve, a left boss-type mating surface, a right boss-type mating surface, bearing seven, bearing eight, pin, bearing nine, mating surface, bearing cover four, and bearing ten; the small-tooth-difference planetary gear is directly meshed with the small-tooth-difference internal gear on the right side of the reel, and the small-tooth-difference planetary gear is supported on the eccentric sleeve through bearing eight, and the T-shaped output shaft with a keyway on the right side of the dual-speed planetary carrier is connected to the hole of the eccentric sleeve through a key, and the eccentric sleeve is fixed to the T-shaped output shaft with a keyway on the left side through a shoulder and on the right side through a sleeve, and the pin passes through the hole of the small-tooth-difference planetary gear, and both sides are fixed by shaft retaining rings and shoulders On the boss mating surface, the left boss mating surface and the right boss mating surface are supported on the drum through bearing seven, the left boss mating surface is fixed to the mating surface by screws, the left side of the mating surface is fixed to the connecting frame by screws and there is a sealing gasket at the mating position, and it is supported on the T-shaped output shaft of the two-speed planetary carrier through bearing nine, the left boss mating surface is supported on the drum through bearing seven, a gap is left between the bearing cover four and the mating surface, and a seal four is installed at the gap; the right boss mating surface is supported on the housing through bearing seven, a gap is left between the bearing cover three and the right bracket, and a seal three is installed at the gap; the boss mating surface on the right side is fixed to the right bracket by screws to realize the fixation of the pin shaft, and the right side of the output shaft of the two-speed planetary carrier is supported in the hole of the right bracket through bearing six.

[0010] The first-stage planetary gear system in the "dual speed + first-stage planetary reduction + pin-fixed small-tooth-difference planetary reduction" mode includes an I-shaped first-stage center wheel, a first-stage planetary gear, a bearing 11, a first-stage planetary carrier and a first-stage internal gear; the I-shaped first-stage center wheel replaces the T-shaped output shaft of the dual-speed planetary carrier, the first-stage center wheel meshes with the first-stage planetary gear, the first-stage planetary gear is supported on the first-stage planetary carrier through the bearing 11, and is meshed with the first-stage internal gear machined on the inner wall of the connecting frame, and the shaft on the right side of the first-stage planetary carrier is machined into a shaft with a keyway and is connected to the eccentric shaft sleeve through a key.

[0011] The "double speed + pin-fixed small tooth difference planet + fixed axis reduction" mode is in the double speed planetary gear system, the number of teeth of the double speed center wheel is z a1 , the number of teeth of the two-speed internal gear ring is z b1 The double-speed center wheel is the input component with a speed of n a1 The two-speed planet carrier is the output component with a speed of n h1 ; In the small tooth difference planetary gear system, the number of teeth of the small tooth difference planetary gear and the small tooth difference fixed internal gear on the right side of the connecting frame are z1 and z2 respectively, and the connecting frame is stationary, so n2=0; the small tooth difference planetary gear is the input component, and the speed is n H =n h1, the pin is the output component, the speed is n3, in the fixed axis gear train, the number of teeth of the fixed axis center wheel and the fixed axis inner gear ring are z respectively a2 , z b2 , the speed of the fixed axis center wheel n a2 =n3, the fixed shaft inner gear ring and the winding drum are the same output component with a speed of n b2 The slider and the two-speed internal gear ring are always meshed. By turning the handle, the position a and position b are switched. When the handle is in position a, the slider is meshed with the connecting frame and disengaged from the two-speed center wheel. The speed of the two-speed internal gear ring is n b1 =0, the winch is in low speed gear, and the drum speed When in position b, the slider is engaged with the two-speed center wheel and disengaged from the connecting frame. The speed of the two-speed center wheel and the two-speed internal gear ring is the same, that is, n a1 =n b1 At this time, the winch is in high gear and the speed of the drum is

[0012] In the small-tooth-difference gear train of the "double-speed + pin-fixed small-tooth-difference planetary reduction", the small-tooth-difference planetary gear is the input component, the number of teeth is z1, and the speed is n H =n h1 The internal gear with less teeth difference on the right side of the drum is the output component, with the number of teeth z2 and the speed n b2 , when the winch is in low gear, When the winch is in high gear,

[0013] In the first-stage planetary gear system of the "double-speed + first-stage planetary reduction + pin-fixed small-tooth-difference planetary reduction", the number of teeth of the first-stage center gear is z a3 , the number of teeth of the first-stage internal gear is z b3 , the first-stage center wheel is the input component, the speed is n a3 =n h1 , the first-stage planet carrier is the output component, the speed n h3 =n a2 , when the winch is in low gear, When the winch is in high gear, When blocking, When the winch is in high gear,

[0014] Beneficial effect: Due to the adoption of the above technical solution, the utility model adopts a transmission device of a two-speed multi-purpose winch with a planetary gear transmission speed change mechanism, and uses a speed reduction mechanism composed of a group of speed change mechanisms, a planetary gear train with a small tooth difference, a planetary gear train or a fixed axis gear train. By turning the handle to change the speed of the inner gear ring in the speed change mechanism, the two-speed transmission is completed, and the switching of the high and low speed gears is realized. When the connecting rod is in position a, the slider, the inner gear ring and the stationary connecting frame can be regarded as the same component, the speed is zero, and the winch is in low speed gear; when the connecting rod is in position b, the slider, the inner gear ring and the center wheel in the speed change mechanism can be regarded as the same component, the speed is the same, and the transmission ratio of the speed change mechanism is 1, and the winch is in high speed gear. The gear reduction mechanism is composed of a fixed-axis gear train or a multi-stage planetary gear train and a fixed-axis gear train. The output member is directly connected to the drum externally connected to the reducer housing. The gear meshing of the reduction mechanism does not change when the gear is switched. Only by changing the speed of the inner gear ring in the speed change mechanism, the shortcomings of the JSDB series of dual-speed multi-purpose winches, such as complex structure and low transmission efficiency, are solved. It has the advantages of simple structure and small footprint. By utilizing the symmetry of the planetary gear structure, it can share the effective circumferential load and offset the harmful radial load and inertia force. It has the advantages of compact structure and strong resistance to impact and vibration. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a two-speed winch with the mode of "two-speed + planetary with small tooth difference and fixed inner gear ring + fixed shaft reduction".

[0016] Figure 2 It is a two-speed winch with the mode of "two-speed + pin-fixed small-tooth-difference planetary reduction".

[0017] Figure 3 It is a two-speed winch with the mode of "two-speed + one-stage planetary + pin-fixed small-tooth-difference planetary reduction".

[0018] In the figure: 1-motor; 2-coupling; 3-bearing 1; 4-handle; 5-drag hook; 6-seal 1; 7-bearing cover 1; 8-support plate; 9-bearing 2; 10-bearing 3; 11-bearing 4; 12-reel; 13-bearing 5; 14-housing; 15-bearing 6; 16-right bracket; 17-left bracket; 18-fixed bracket; 19-slider; 20-connecting bracket; 21-dual-speed inner gear ring; 22-dual-speed center wheel; 23-1-left brake disc; 23-2-right brake disc; 24-dual-speed planetary gear set; 25-dual-speed planetary carrier; 25-1-T-shaped output shaft; 26-1-left boss mating surface; 26-2- Right side boss type mating surface; 27-eccentric sleeve; 28-bearing seven; 29-small tooth difference planetary gear; 30-pin; 31-bearing eight; 32-seal two 33-center wheel shaft; 34-fixed axis center wheel; 35-fixed axis idler gear set; 36-idler wheel fixed axis; 37-fixed axis inner gear ring; 38-fixed axis; 39-bearing cover three; 40-seal three; 41-bearing nine; 42-mating surface; 43-bearing cover four; 44-seal four; 45-bearing ten; 46-first-stage planetary gear; 47-bearing eleven; 48-first-stage planetary carrier; 49-first-stage center wheel; 50-first-stage internal gear; 51-sleeve; 52-small tooth difference fixed internal gear. DETAILED DESCRIPTION

[0019] The present invention will be further described below with reference to the embodiments in the accompanying drawings:

[0020] Embodiment 1: Figure 1As shown, a two-speed multi-purpose winch with a small-tooth-difference planetary gear train speed change mechanism comprises a motor 1, a coupling 2, a drum 12, and a left brake disc 23-1 and a right brake disc 23-2 arranged on the left and right side plates of the drum 12; the "two-speed + small-tooth-difference planetary with fixed inner gear ring + fixed-axis reduction" mode comprises a two-speed planetary gear train arranged in the drum 12, a small-tooth-difference planetary gear train with fixed inner gear ring, and a fixed-axis gear train connected to the rear of the drum 12; the two-speed planetary gear train comprises a two-speed center wheel 22, a two-speed planetary gear set 24, a two-speed planetary carrier 25, a two-speed inner gear ring 21, a fixing frame 18, a slider 19, a connecting frame 20 and a handle 4; the two-speed center wheel 2 2 is a stepped shaft arranged in large, small and medium diameters. The large diameter shaft section is connected to the output shaft of the motor 1 through the coupling 2, and the medium diameter shaft section is a shaft gear, and part of the shaft gear is meshed with the outer gear ring of the two-speed planetary gear set 24; the slider 19 is set on the small diameter shaft section in the middle of the two-speed center wheel 22, and a groove is provided on the outer circumference of the left side of the slider 19, and an outer gear ring meshed with the left inner gear ring of the two-speed inner gear ring 21 is provided on the outer circumference of the right side of the slider 19, and an inner gear ring meshed with another part of the gear teeth of the two-speed center wheel 22 is provided on the inner hole on the right side of the slider 19. The left end face of the fixed frame 18 is fixed to the motor 1, and the right side is set on the coupling through the bearing 3. 2, two holes a and b for fixing the handle 4 are opened in the middle of the fixing frame 18; the handle 4 is fixedly connected with a towing hook 5 hooked in the outer circumferential groove on the left side of the slider 19; the left end face of the connecting frame 20 is connected to the right end face of the fixing frame 18, and the front part of the connecting frame 20 is provided with a supporting plate 8 fixedly connected to the left end of the reel 12 through a bearing 2 9, and the supporting plate 8 is supported on the connecting frame 20 through a bearing 2 9; the outer gear ring of the two-speed planetary gear set 24 is meshed with the inner gear ring on the right side of the two-speed inner gear ring 21, and the two-speed inner gear ring 21 is provided with a bearing 3 10 fixed on the connecting frame 20, and the two-speed planetary gear set 24 is arranged on the two-speed planetary carrier through a bearing 4 11 25, a T-shaped output shaft 25-1 is provided at the right end of the two-speed planetary carrier 25, which connects the two-speed planetary gear system with the small-tooth-difference planetary gear system fixed with the inner ring gear as a whole; the motor 1 is supported on the ground via the left bracket 17; when the winch needs to be in low speed gear for work, the slider 19 is moved to position a by the handle 4, the slider 19 is engaged with the connecting frame 20 and disengaged from the two-speed center wheel 22, and the speed of the two-speed inner ring gear 21 is zero; when the winch needs to be in high speed gear for work, the slider 19 is moved to position b, the slider 19 is engaged with the two-speed center wheel 22 and disengaged from the connecting frame 20, and the speed of the two-speed center wheel 22 and the two-speed inner ring gear 21 are the same.

[0021] In the dual-speed planetary gear system, the number of teeth of the dual-speed center wheel 22 is z. a1 , the number of teeth of the two-speed internal gear ring 21 is z b1 The two-speed center wheel 22 is the input component with a rotation speed of n a1The two-speed planet carrier 25 is the output component with a speed of n h1 ; In the small tooth difference planetary gear system, the number of teeth of the small tooth difference planetary gear 29 and the small tooth difference fixed internal gear 52 on the right side of the connecting frame 20 are z1 and z2 respectively, and the connecting frame 20 is stationary, so n2=0; the small tooth difference planetary gear 29 is the input component, and the speed is n H =n h1 , the pin 30 is the output member, the speed is n3, in the fixed axis gear train, the number of teeth of the fixed axis center wheel 34 and the fixed axis inner gear ring 37 are z respectively a2 , z b2 , the rotation speed n of the fixed axis center wheel 34 a2 = n3, the fixed shaft internal gear ring 37 and the winding drum 12 are the same output component with a rotation speed of n b2 The slider 19 and the two-speed internal gear ring 21 are always meshed, and the position a and position b are switched by toggling the handle 4. When the handle 4 is in position a, the slider 19 is meshed with the connecting frame 20 and disengaged from the two-speed center wheel 22, and the speed of the two-speed internal gear ring 21 is n b1 =0, the winch is in low speed gear, and the speed of drum 12 is When in position b, the slider 19 is engaged with the two-speed center wheel 22 and disengaged from the connecting frame 20, and the rotation speed of the two-speed center wheel 22 and the two-speed internal gear ring 21 is the same, that is, n a1 =n b1 At this time, the winch is in high gear, and the speed of the drum 12 is

[0022] The handle 4 is movably matched with the holes at two positions a and b, and a sealing ring is provided at the matching position.

[0023] Embodiment 2: Figure 2As shown, a double-speed multi-purpose winch with a small-tooth-difference planetary gear train speed change mechanism comprises a motor 1, a coupling 2, a drum 12, and a left brake disc 23-1 and a right brake disc 23-2 arranged on the left and right side plates of the drum 12; in the "double-speed + pin-fixed small-tooth-difference planetary reduction" mode, the small-tooth-difference planetary reduction is a small-tooth-difference pin-fixed, small-tooth-difference inner gear ring output mode, and the small-tooth-difference planetary gear train comprises a small-tooth-difference planetary gear 29, an eccentric shaft sleeve 27, a left boss-type mating surface 26-1, a right boss-type mating surface 26-2, a bearing seven 28, and a bearing Eight 31, pin 30, bearing nine 41, matching surface 42, bearing cover four 43, bearing ten 45; the small tooth difference planetary gear 29 is directly meshed with the small tooth difference internal gear on the right side of the reel 12, the small tooth difference planetary gear 29 is supported on the eccentric sleeve 27 through the bearing eight 31, the T-shaped output shaft 25-1 with a keyway on the right side of the dual-speed planetary carrier 25 is connected with the hole of the eccentric sleeve 27 through a key, the left side of the eccentric sleeve 27 is fixed to the T-shaped output shaft 25-1 with a keyway through the shoulder and the right side through the sleeve 51, the pin 30 passes through the small tooth difference planetary gear 29 on the right side of the reel 12, and the small tooth difference planetary gear 29 is directly meshed with the small tooth difference internal gear on the right side of the reel 12, and the small tooth difference planetary gear 29 is supported on the eccentric sleeve 27 through the bearing eight 31, and the T-shaped output shaft 25-1 with a keyway on the right side of the dual-speed planetary carrier 25 is connected with the hole of the eccentric sleeve 27 through a key, and the eccentric sleeve 27 is fixed to the T-shaped output shaft 25-1 with a keyway through the shoulder and the sleeve 51 on the left side. The hole of the tooth difference planetary gear 29 is fixed on the boss-type mating surface on both sides through the shaft with a retaining ring and a shaft shoulder. The left boss-type mating surface 26-1 and the right boss-type mating surface 26-2 are supported on the reel 12 through the bearing seven 28. The left boss-type mating surface 26-1 is fixed on the mating surface 42 by screws. The left side of the mating surface 42 is fixed on the connecting frame 20 by screws and a sealing gasket is provided at the mating position. It is supported on the T-shaped output shaft 25-1 of the dual-speed planetary carrier 25 through the bearing nine 41. The boss-type mating surface 26-1 on the left side is fixed on the shaft Bearing 7 28 is supported on the reel 12, and a gap is left between bearing cover 4 43 and mating surface 42, and a seal 4 44 is installed at the gap; the right boss mating surface 26-2 is supported on the housing 14 through bearing 7 28, and a gap is left between bearing cover 3 39 and right bracket 16, and a seal 3 40 is installed at the gap; the boss mating surface 26-2 on the right side is fixed to the right bracket 16 by screws to fix the pin shaft, and the right side of the output shaft 25-1 of the two-speed planetary carrier 25 is supported in the hole of the right bracket 16 by bearing 6 15. In the small-tooth difference gear system of the "two-speed + pin-fixed small-tooth difference planetary reduction", the small-tooth difference planetary gear 29 is the input component, the number of teeth is z1, and the speed is n H =n h1 The internal gear with a small tooth difference on the right side of the drum 12 is the input component, with a tooth number of z2 and a speed of n b2 , when the winch is in low gear, When the winch is in high gear,

[0024] Embodiment 3: Figure 3As shown, a two-speed multi-purpose winch with a small-tooth-difference planetary gear train speed change mechanism includes a motor 1, a coupling 2, a drum 12, and a left brake disc 23-1 and a right brake disc 23-2 arranged on the left and right side plates of the drum 12; the "two-speed + first-stage planet + small-tooth-difference planetary reduction with pin fixation" mode includes: "two-speed + small-tooth-difference planetary reduction with pin fixation" mode and a first-stage planetary gear train added between the "two-speed + small-tooth-difference planetary reduction with pin fixation" mode, the left side of the first-stage planetary gear train is connected to the two-speed planet carrier 25, and the right side is connected to the left side of the center wheel shaft 33 processed into a T shape, and the right shaft of the first-stage planet carrier 48 is processed into a T-shaped center wheel shaft 33 with a keyway and connected to the eccentric shaft sleeve 27 through a key, forming the "two-speed + first-stage planet + small-tooth-difference planetary reduction with pin fixation" mode. In the first-stage planetary gear train of the "two-speed + first-stage planetary reduction + small-tooth-difference planetary reduction with pin fixation", the number of teeth of the first-stage center wheel 49 is z a3 , the number of teeth of the first-stage internal gear 50 is z b3 , the first-stage central wheel 49 is the input component, the speed n a3 =n h1 , the first-stage planet carrier 48 is the output component, the speed n h3 =n a2 , When the winch is in low gear, When the winch is in high gear,

[0025] The above-mentioned fixed-axis gear train, two-speed planetary gear train, one-stage planetary gear train, and small-tooth-difference planetary gear train all adopt oil lubrication.

Claims

1. A two-speed multi-purpose winch with a small-tooth-difference planetary gear train speed change mechanism, comprising a motor (1), a coupling (2), a drum (12), and a left brake disc (23-1) and a right brake disc (23-2) arranged on left and right side plates of the drum (12), characterized in that: It also includes three modes: "double speed + planetary with small tooth difference and fixed inner gear ring + fixed shaft reduction", "double speed + planetary with small tooth difference and fixed pin", or "double speed + first-stage planetary + planetary with small tooth difference and fixed pin". Mode 1: The "dual-speed + small-tooth-difference planetary gear with fixed inner gear ring + fixed-axis reduction" mode comprises a two-speed planetary gear train arranged in the reel (12), a small-tooth-difference planetary gear train with fixed inner gear ring and a fixed-axis gear train connected to the rear of the reel (12); the two-speed planetary gear train comprises a two-speed center wheel (22), a two-speed planetary gear set (24), a two-speed planetary carrier (25), a two-speed inner gear ring (21), a fixed frame (18), a slider (19), a connecting frame (20) and a handle (4); the two-speed center wheel (22) is a stepped shaft arranged in large, small and medium diameters, the large-diameter shaft section is connected to the output shaft of the motor (1) through a coupling (2), the medium-diameter shaft section is a shaft gear, and part of the shaft gear is connected to the output shaft of the motor (1). The outer gear ring of the two-speed planetary gear set (24) is meshed with the outer gear ring of the two-speed center wheel (24); the slider (19) is mounted on the small diameter shaft section in the middle of the two-speed center wheel (22); a groove is provided on the outer circumference of the left side of the slider (19); an outer gear ring is provided on the outer circumference of the right side of the slider (19) to mesh with the inner gear ring on the left side of the two-speed inner gear ring (21); the inner hole on the right side of the slider (19) is provided with an inner gear ring that can mesh with another part of the gear teeth of the two-speed center wheel (22); the left end face of the fixed frame (18) is fixed to the motor (1), and the right side is mounted on the coupling (2) through the bearing 1 (3); the middle part of the fixed frame (18) is provided with two holes at positions a and b for fixing the handle (4); the handle (4) is fixedly connected to the inner gear ring A towing hook (5) is hooked in the outer circumferential groove on the left side of the slider (19); the left end face of the connecting frame (20) is connected to the right end face of the fixing frame (18); the front part of the connecting frame (20) is provided with a supporting plate (8) fixedly connected to the left end of the winding drum (12) via a second bearing (9); the supporting plate (8) is supported on the connecting frame (20) via a second bearing (9); the outer gear ring of the two-speed planetary gear set (24) is meshed with the inner gear ring on the right side of the two-speed inner gear ring (21); the two-speed inner gear ring (21) is provided with a third bearing (10) fixed on the connecting frame (20); the two-speed planetary gear set (24) is provided on the two-speed planetary carrier (25) via a fourth bearing (11); the right end of the two-speed planetary carrier (25) is provided with a A T-shaped output shaft (25-1) is provided for connecting the two-speed planetary gear train and the small-tooth-difference planetary gear train fixed with the inner gear ring as a whole; the motor (1) is supported on the ground via a left bracket (17); when the winch is required to be in a low-speed gear for work, the slider (19) is moved to position a by a handle (4), the slider (19) is meshed with the connecting frame (20) and is disengaged from the two-speed center wheel (22), and the rotation speed of the two-speed inner gear ring (21) is zero; when the winch is required to be in a high-speed gear for work, the slider (19) is moved to position b, the slider (19) is meshed with the two-speed center wheel (22) and is disengaged from the connecting frame (20), and the rotation speeds of the two-speed center wheel (22) and the two-speed inner gear ring (21) are the same; Mode 2, the "double speed + pin-fixed small tooth difference planetary reduction" mode, includes the "double speed planetary gear train" + pin-fixed small tooth difference planetary reduction mode in mode 1: "double speed + inner gear ring fixed small tooth difference planetary + fixed shaft reduction", the pin-fixed small tooth difference planetary reduction mode is a "fixed small tooth difference pin, small tooth difference inner gear ring output" small tooth difference planetary gear train; that is: the right shaft of the double speed planet carrier (25) is processed into a T-shaped output shaft with a keyway (25-1) is connected to the hole of the eccentric shaft sleeve (27) through a key, and the right side of the column pin (30) is fixed to the right side boss type matching surface (26-2) through a shaft shoulder. The right side boss type matching surface (26-2) is directly connected to the connecting frame (20) through a screw to achieve the fixation of the column pin (30). The small tooth difference planetary gear (29) is directly meshed with the small tooth difference internal gear on the right side of the winding drum (12) for transmission, forming a "double speed + column pin fixed small tooth difference planetary reduction" mode; Mode 3, the "double speed + primary planet + pin-fixed small tooth difference planetary reduction" mode includes: the "double speed + pin-fixed small tooth difference planetary reduction" mode and a primary planetary gear system added between the "double speed + pin-fixed small tooth difference planetary reduction" mode, the left side of the primary planetary gear system is connected to the double speed planet carrier (25), and the right side is connected to the left side of the center wheel shaft (33) processed into a T shape, the shaft on the right side of the primary planet carrier (48) is processed into a T-shaped center wheel shaft (33) with a keyway and connected to the eccentric shaft sleeve (27) through a key, forming the "double speed + primary planet + pin-fixed small tooth difference planetary reduction" mode.

2. The double-speed multi-purpose winch with a small-tooth-difference planetary gear train speed change mechanism according to claim 1, characterized in that: The "double speed + small tooth difference planetary gear with fixed inner gear ring + fixed shaft reduction" mode, the small tooth difference planetary gear train with fixed inner gear ring is: a small tooth difference planetary reduction of "small tooth difference fixed inner gear ring, pin shaft output mode", the small tooth difference planetary gear train comprises a small tooth difference planetary gear (29) arranged on a T-shaped output shaft (25-1), an eccentric shaft sleeve (27), a left boss type matching surface (26-1), a right boss type matching surface (26-2), a bearing seven (28), a bearing eight (31), a pin (30), a connecting frame (20), and a center wheel shaft (33); the small tooth difference planetary gear (29) is meshed with a small tooth difference fixed inner gear (52) arranged on the right side of the connecting frame (20), and the small tooth difference planetary gear (29) is connected to the connecting frame (20) through the bearing eight. The two-speed planetary carrier (25) is supported on the eccentric shaft sleeve (27). The T-shaped output shaft (25-1) with a keyway on the right side of the two-speed planetary carrier (25) is connected to the hole of the eccentric shaft sleeve (27) through a key. The eccentric shaft sleeve (27) is fixed to the T-shaped output shaft (25-1) with a keyway on the left side through a shaft shoulder and on the right side through a shaft retaining ring. The pin (30) passes through the hole of the small tooth difference planetary gear (29). Both sides are fixed to the boss-type matching surfaces on the left and right sides through shaft retaining rings and shaft shoulders. The boss-type matching surfaces on the left and right sides of the pin (30) are supported on the connecting frame (20) through bearing seven (28). The boss-type matching surface (26-2) on the right side is connected to the center wheel shaft (33) with a keyway through a left key. The center wheel shaft (33) with a keyway is connected to the fixed wheel shaft (33). The hole of the shaft center wheel (34) is connected by a right key; the fixed shaft gear train comprises a fixed shaft center wheel (34), a fixed shaft idler wheel group (35), an idler wheel fixed shaft (36), a fixed shaft inner gear ring (37), a fixed shaft (38), a fifth bearing (13), a third bearing cover (39) and a housing (14); the fixed shaft center wheel (34) is meshed with the fixed shaft idler wheel group (35), the fixed shaft idler wheel group (35) is supported on the idler wheel fixed shaft (36) through the fifth bearing (13), the idler wheel fixed shaft (36) passes through the hole of the fixed shaft (38), and is fixed to the fixed shaft (38) through a shaft shoulder on the right side and a shaft elastic retaining ring on the left side; the shaft on the left side of the fixed shaft (38) is sealed with the hole of the connecting frame (20), and the hole on the left side is connected with a T-shaped transmission with a keyway. A gap is left between the shafts on the left side of the output shaft (25-1), and a seal 2 (32) is arranged at the gap. The shaft on the right side of the fixed shaft (38) is circumferentially fixed to the hole of the right bracket (16) by a key; the fixed shaft inner gear ring (37) is meshed with the fixed shaft idler gear set (35); the left brake disc (23-1), the right brake disc (23-2), and the right side plate of the reel (12) are fixed by screws and a seal is arranged at the matching position; the right side is fixed to the housing (14) by screws and a seal is arranged at the matching position; the housing (14) is supported on the fixed shaft (38) by a bearing 6 (15), and a bearing cover 3 (39) is fixed to the housing (14) by screws. A gap is left between the bearing cover 3 (39) and the fixed shaft (38), and a seal 3 (40) is arranged at the gap.

3. The dual-speed multi-purpose winch with a small-tooth-difference planetary gear train speed change mechanism according to claim 1, characterized in that: In the "double speed + pin-fixed small-tooth-difference planetary reduction" mode, the small-tooth-difference planetary reduction is a small-tooth-difference pin-fixed, small-tooth-difference inner gear ring output mode, and the small-tooth-difference planetary gear train includes a small-tooth-difference planetary gear (29), an eccentric shaft sleeve (27), a left boss-type mating surface (26-1), a right boss-type mating surface (26-2), a bearing seven (28), a bearing eight (31), a pin (30), a bearing nine (41), a mating surface (42), a bearing cover four (43), and a bearing ten (45); the small-tooth-difference planetary gear (29) is directly connected to the winding drum (12 ) is meshed with the small tooth difference internal gear on the right side, the small tooth difference planetary gear (29) is supported on the eccentric shaft sleeve (27) through the bearing eight (31), the T-shaped output shaft (25-1) with a keyway on the right side of the dual-speed planetary carrier (25) is connected to the hole of the eccentric shaft sleeve (27) through a key, the eccentric shaft sleeve (27) is fixed to the T-shaped output shaft (25-1) with a keyway on the left side through a shaft shoulder and on the right side through a shaft sleeve (51), the pin (30) passes through the hole of the small tooth difference planetary gear (29), and the two sides are fixed on the boss type matching surface through a shaft retaining ring and a shaft shoulder, and the boss type matching surface on the left side is fixed to the boss type matching surface on the left side. The left boss-type mating surface (26-1) and the right boss-type mating surface (26-2) are supported on the drum (12) through bearing seven (28), the left boss-type mating surface (26-1) is fixed to the mating surface (42) through screws, the left side of the mating surface (42) is fixed to the connecting frame (20) through screws and a sealing gasket is provided at the mating position, and is supported on the T-shaped output shaft (25-1) of the dual-speed planetary carrier (25) through bearing nine (41), the left boss-type mating surface (26-1) is supported on the drum (12) through bearing seven (28), and the bearing cover four (43) is fixed to the connecting frame (20) through screws. A gap is left between the mating surfaces (42), and a seal four (44) is installed at the gap; the right boss type mating surface (26-2) is supported on the housing (14) through the bearing seven (28), and a gap is left between the bearing cover three (39) and the right bracket (16), and a seal three (40) is installed at the gap; the right boss type mating surface (26-2) is fixed to the right bracket (16) by screws to achieve the fixation of the pin shaft, and the right side of the T-shaped output shaft (25-1) of the dual-speed planetary carrier (25) is supported in the hole of the right bracket (16) through the bearing six (15).

4. The dual-speed multi-purpose winch with a small-tooth-difference planetary gear train speed change mechanism according to claim 1, characterized in that: The first-stage planetary gear train in the "double-speed + first-stage planetary reduction + pin-fixed small-tooth-difference planetary reduction" mode comprises an I-shaped first-stage central wheel (49), a first-stage planetary wheel (46), a bearing 11 (47), a first-stage planetary carrier (48) and a first-stage internal gear (50); the I-shaped first-stage central wheel (49) replaces the T-shaped output shaft (25-1) of the double-speed planetary carrier (25); the first-stage central wheel (49) meshes with the first-stage planetary wheel (46); the first-stage planetary wheel (46) is supported on the first-stage planetary carrier (48) through the bearing 11 (47) and meshes with the first-stage internal gear (50) processed on the inner wall of the connecting frame (20); the right shaft of the first-stage planetary carrier (48) is processed into a central wheel shaft (33) with a keyway and connected to the eccentric shaft sleeve (27) through a key.

5. The dual-speed multi-purpose winch with a small-tooth-difference planetary gear train speed change mechanism according to claim 1, characterized in that: In the "double speed + small tooth difference planet with fixed inner gear ring + fixed axis reduction" mode, in the double speed planetary gear system, the number of teeth of the double speed center wheel (22) is z a1 , the number of teeth of the two-speed internal gear ring (21) is z b1 The double-speed center wheel (22) is the input component with a rotation speed of n a1 The two-speed planet carrier (25) is an output component with a speed of n h1 In the small-tooth-difference planetary gear system, the numbers of teeth of the small-tooth-difference planetary gear (29) and the small-tooth-difference fixed internal gear (52) on the right side of the connecting frame (20) are z1 and z2 respectively, and the connecting frame (20) is stationary, so n2=0; the small-tooth-difference planetary gear (29) is the input component, and the speed is n H =n h1 The pin (30) is an output member, and the rotation speed is n3. In the fixed axis gear train, the number of teeth of the fixed axis center wheel (34) and the fixed axis inner gear ring (37) are z respectively. a2 , z b2 , the rotation speed n of the fixed axis center wheel (34) a2 = n3, the fixed shaft inner gear ring (37) and the winding drum (12) are the same output component, and the speed is n b2 The slider (19) and the two-speed internal gear ring (21) are always meshed, and the position a and the position b are switched by toggling the handle (4). When the handle (4) is in position a, the slider (19) is meshed with the connecting frame (20) and disengaged from the two-speed center wheel (22), and the speed of the two-speed internal gear ring (21) is n. b1 = 0, the winch is in low speed gear, and the speed of the drum (12) When in position b, the slider (19) is meshed with the two-speed center wheel (22) and disengaged from the connecting frame (20), and the speeds of the two-speed center wheel (22) and the two-speed inner gear ring (21) are the same, that is, n a1 =n b1 At this time, the winch is in high gear, and the speed of the drum (12) 6. The dual-speed multi-purpose winch with a small-tooth-difference planetary gear train speed change mechanism according to claim 1, characterized in that: In the small-tooth-difference gear train of the "double-speed + pin-fixed small-tooth-difference planetary reduction", the small-tooth-difference planetary gear (29) is the input component, the number of teeth is z1, and the speed is n H =n h1 The internal gear with a small tooth difference on the right side of the reel (12) is an output component, with a tooth number of z2 and a rotation speed of n b2 , when the winch is in low gear, When the winch is in high gear, 7. The dual-speed multi-purpose winch with a small-tooth-difference planetary gear train speed change mechanism according to claim 1, characterized in that: In the first-stage planetary gear system of the "double-speed + first-stage planetary reduction + pin-fixed small-tooth-difference planetary reduction", the number of teeth of the first-stage center wheel (49) is z a3 , the number of teeth z of the first internal gear (50) b3 The first-stage center wheel (49) is the input component, and the speed n a3 =n h1 The first-stage planet carrier (48) is an output component, and the speed n h3 =n a2 , When the winch is in low gear, When the winch is in high gear, 8. The dual-speed multi-purpose winch with a small-tooth-difference planetary gear train speed change mechanism according to claim 1, characterized in that: The fixed-axis gear train, the two-speed planetary gear train, the primary planetary gear train, and the small-tooth-difference planetary gear train all adopt oil lubrication.

9. The dual-speed multi-purpose winch with a small-tooth-difference planetary gear train speed change mechanism according to claim 1, characterized in that: The handle (4) is movably matched with the holes at two positions a and b, and a sealing ring is provided at the matching position.

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