CN108516481B - Three-stage speed reduction transmission device of chain block - Google Patents
Three-stage speed reduction transmission device of chain block Download PDFInfo
- Publication number
- CN108516481B CN108516481B CN201810534985.4A CN201810534985A CN108516481B CN 108516481 B CN108516481 B CN 108516481B CN 201810534985 A CN201810534985 A CN 201810534985A CN 108516481 B CN108516481 B CN 108516481B
- Authority
- CN
- China
- Prior art keywords
- gear
- driving
- wallboard
- shaft
- output shaft
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 230000005540 biological transmission Effects 0.000 title claims abstract description 31
- 230000000712 assembly Effects 0.000 claims description 5
- 238000000429 assembly Methods 0.000 claims description 5
- 230000000149 penetrating effect Effects 0.000 claims description 3
- 230000002411 adverse Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 241000219122 Cucurbita Species 0.000 description 1
- 235000009852 Cucurbita pepo Nutrition 0.000 description 1
- 208000032370 Secondary transmission Diseases 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 229920002635 polyurethane Polymers 0.000 description 1
- 239000004814 polyurethane Substances 0.000 description 1
- 125000006850 spacer group Chemical group 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66D—CAPSTANS; WINCHES; TACKLES, e.g. PULLEY BLOCKS; HOISTS
- B66D1/00—Rope, cable, or chain winding mechanisms; Capstans
- B66D1/02—Driving gear
- B66D1/14—Power transmissions between power sources and drums or barrels
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66D—CAPSTANS; WINCHES; TACKLES, e.g. PULLEY BLOCKS; HOISTS
- B66D1/00—Rope, cable, or chain winding mechanisms; Capstans
- B66D1/28—Other constructional details
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Transmission Devices (AREA)
Abstract
The invention discloses a three-stage speed reduction transmission device of a chain block, which comprises an output shaft with a gear part, a lifting chain wheel with an external spline part, a spline hole gear connected with the external spline part, a brake, a driving hand chain wheel, a driving mechanism and a sheet tooth short shaft gear component meshed with the gear part and the spline hole gear, wherein the driving mechanism comprises a gear ring arranged on the right side of a right wall plate at intervals, an end cover plate covered with the gear ring, a driving shaft with a driving gear rotatably supported on the end cover plate, a bridge gear frame which is sleeved on the left end of the driving shaft and is circumferentially fixed with the right end of the output shaft, at least two bridge gears symmetrically arranged on the bridge gear frame, each bridge gear is meshed with the driving gear outside and the gear ring inside, and the brake and the driving hand chain wheel are sequentially connected on the driving shaft through transmission threads. The invention has compact structure, high rotation speed reduction ratio and high transmission torque, and the chain block not only has scientific rationality of the block body size, but also has light chain and high hoisting efficiency.
Description
[ field of technology ]
The invention relates to a three-stage speed reduction transmission device of a chain block, and belongs to the technical field of three-stage speed reduction transmission of chain blocks.
[ background Art ]
As shown in fig. 4 and 5, the most widely used chain block is a two-stage spur gear driven HS-series chain block, in which two ends of a long shaft L 'extend through a lifting sprocket 3', and the chain block is provided with two rows of lifting chains G '-1, G' -2. The hand pulling force is larger due to the small rotation speed reduction ratio, if the hand pulling force is light, the diameter of the existing driving wheel system is usually increased, or a driving wheel shaft speed reducing chain is additionally arranged between the sheet tooth short shaft tooth assembly 1 'and the spline hole gear 2', and the chain wheel speed reducing chain can lead to a gourd body to be very huge; compared with a single-row lifting chain, the two-row lifting chain has the advantages that the internal structure of the lifting hoist body is complex, the body volume is large, and the space for adding additional accessories is occupied in the body.
[ invention ]
The invention aims to provide the three-stage speed reduction transmission device of the chain block with compact structure, large rotation speed reduction ratio and large transmission torque, and the chain block provided with the device not only has scientific rationality of the block body size, but also has light and labor-saving hand power and high hoisting work efficiency.
For this reason, the technical solution of the present invention, which is substantially different from the prior art, provides the following:
the three-stage speed reducing transmission device of the chain block comprises an output shaft with a gear part at the left end, a piece of gear short shaft gear assembly, a spline hole gear, a lifting chain wheel with an external spline part at the left end, a ratchet double friction plate type brake and a driving chain wheel meshed with a chain, wherein the lifting chain wheel is arranged on a left wall plate and a right wall plate in a rotating mode; the brake and the driving hand chain wheel are sequentially connected to the driving shaft through transmission threads, the driving hand chain wheel is adjacent to the right end of the driving shaft, and a ratchet wheel of the brake is meshed with two pawl assemblies arranged on the end cover plate.
The gear rings are arranged on the right side of the right wallboard at intervals through connecting rods, wherein the gear rings are provided with mounting holes for the connecting rods to pass through, elastic bushings are arranged at the penetrating sections of the connecting rods in the mounting holes, and the end cover plates are fixed on the outer ends of the connecting rods; the driving gear and the driving shaft is a single, integral part.
The driving gear and the driving shaft are arranged into a single integral part, and a driving gear shaft of the integral part can improve transmission precision; after the elastic bushing is additionally arranged, the gear ring can generate micro self-adaptive displacement relative to the connecting rod, so that the meshing degree of the whole circumferential ring gear of the gear ring and the multi-carrier gear can be compensated, when the meshing clearance is changed due to overlarge load, the situations of partial poor meshing and partial tooth clamping can be effectively avoided, and adverse effects caused by manufacturing and assembly errors can be reduced.
The gear ring and the end cover plate jointly form a thin box-type structure, the area of the gear ring is smaller than that of a left wallboard and a right wallboard, the specifications of the left wallboard and the right wallboard are the same, and the area of the auxiliary left wallboard is smaller than that of the left wallboard and the right wallboard.
The box-type structural design can improve the integration compactness of parts, and the driving gear and the gap bridge gear shaft can be positioned in the box body so as to realize that the longitudinal dimension of a hoist body adopting the three-stage transmission device is equal to that of the hoist body of the existing two-stage transmission mechanism, namely, the one-stage rear hoist body is increased by speed reduction transmission but not fat.
The invention can realize the three-stage speed reduction transmission of the hoisting chain wheel steering and the driving in the same direction with a large transmission ratio by adding the driving mechanism, on one hand, the driving mechanism has reasonable design and compact structure, and compared with the two-stage transmission mechanism, the length of the output shaft is shorter than that of the existing long shaft, and the added driving mechanism only slightly increases the transverse size of the hoist body; on the other hand, the driving shaft and the output shaft of the driving mechanism have certain coaxiality (the two are approximately positioned on an axis), the brake and the driving hand chain wheel are arranged on the right hand side of the right wallboard, the whole driving mechanism is arranged on the right hand side of the right wallboard, the advantages of the lifting industry in operation habit are inherited, an operator rotates towards the driving hand chain wheel in the forward direction and the reverse direction, the lifting and the lowering of heavy objects can be respectively realized, the speed reduction transmission device has the advantages of large rotation speed reduction ratio and large transmission torque, the hand pulling force of the hand chain wheel for pulling the driving hand chain wheel when lifting the heavy objects is light and labor-saving, the advantage of high hand pulling lifting efficiency is achieved, the number of lines of lifting chains can be reduced to a single line at least, the advantage of stress condition is obvious because the single line has good perpendicularity, the whole machine body can be further compressed, the whole machine is miniaturized, the adverse phenomena such as the unbreakable distortion of a multi-line chain, the chain winding and the chain overturning can be completely avoided, and the use safety of the hand chain hoist is improved.
[ description of the drawings ]
FIG. 1 is a schematic diagram of a chain block equipped with a three-stage reduction gear unit of the present invention;
FIG. 2 is a cross-sectional view of A-A of FIG. 1;
FIG. 3 is a front view of the chain block;
FIG. 4 is a schematic diagram of a prior art chain block with a secondary transmission;
fig. 5 is a front view of a conventional chain block.
[ detailed description ] of the invention
Referring to fig. 1, 2 and 3, a three-stage reduction transmission device of a chain block comprises an output shaft L with a tooth part L1 at the left end, a sheet tooth short shaft tooth assembly 1, a spline hole gear 2, a lifting chain wheel 3 with an external spline part 31 at the left end, a ratchet double friction plate brake 4 and a driving chain wheel 51 meshed with a hand chain 52, wherein the lifting chain wheel 3 rotatably arranged on the left wall plate M1 and the right wall plate M2 is sleeved with the output shaft L, the external spline part 31 extends out of the left wall plate M1, the right end of the output shaft L is positioned in the lifting chain wheel 3, the shaft ends of the output shaft L adjacent to the tooth part L1 are rotatably supported on an auxiliary left wall plate M3, the auxiliary left wall plate M3 is arranged at intervals on the left side of the left wall plate M1, two sheet tooth short shaft tooth assemblies 1 which are arranged in parallel to the output shaft L are rotatably supported on the left wall plate M1 and the auxiliary left wall plate M3 respectively, the spline hole gear 2 is in spline connection with an external spline part 31 of the lifting chain wheel 3, each piece of short shaft gear component 1 is meshed with a gear part L1 of an output shaft L and is meshed with the spline hole gear 2, the improvement is characterized by further comprising a driving mechanism which is directly driven by a hand chain 52 and a driving hand chain wheel 51, the driving mechanism comprises a gear ring 7 which is arranged on the right side of a right wall plate M2 at intervals, an end cover plate M4 which covers the outer end surface of the gear ring 7, a driving shaft R which is rotatably supported on the end cover plate M4, a driving gear R1 which is fixedly arranged on the driving shaft R, a carrier gear 8 which is sleeved on the left end of the driving shaft R and is circumferentially fixed on the right end of the output shaft L, and at least two bridge gears 9 which are symmetrically arranged on the carrier gear 8, wherein each bridge gear 9 is externally meshed with the driving gear R1 and internally meshed with the ring gear of the gear ring 7; the brake 4 and the driving hand sprocket 51 are sequentially connected to the driving shaft R through transmission threads, the driving hand sprocket 51 is adjacent to the right end of the driving shaft R, and the ratchet wheel 42 of the brake 4 is meshed with the two pawl assemblies 6 mounted on the end cover plate M4.
The auxiliary left wallboard M3, the left wallboard M1 and the right wallboard M2 are arranged at intervals from left to right in parallel and are fixedly connected through four supporting rods H1, a spacer bush H11 sleeved on the supporting rods and nuts screwed at two ends of the supporting rods; the lifting sprocket 3 is supported by bearings (not shown) mounted on the left and right wall panels M1 and M2.
The two sets of short shaft tooth assemblies 1 have the same structure and specification and are of a known structure, each short shaft tooth assembly consists of a short shaft, a short shaft tooth part 12 which is turned on the short shaft and a piece gear 11 which is arranged on the short shaft, and the left end and the right end of the short shaft are supported by steel sleeves which are arranged on an auxiliary left wallboard M3 and a left wallboard M1; the spline hole gear 2 and the lifting chain wheel 3 are respectively of a conventional structure, the spline hole gear 2 is sleeved on an external spline part 31 of the lifting chain wheel 3, and an internal spline formed on the central hole wall of the spline hole gear 2 is matched with an external spline of the external spline part 31; the tooth portion L1 of the output shaft L is meshed with the sheet gear 11, and the short-shaft tooth portion 12 is meshed with the teeth of the splined hole gear 2.
The ratchet double friction plate type brake 4 is of a known structure and comprises a brake seat 41, an outer friction plate 43-1, a ratchet 42 and an inner friction plate 43-2, wherein the inner friction plate 43-2, the ratchet 42 and the outer friction plate 43-1 are sequentially sleeved on a necking section of the brake seat 41 from inside to outside, the brake seat 41 is connected to a driving shaft R through transmission threads, and the left end face of the brake seat 41 of the brake 4 is abutted against a shaft shoulder of the driving shaft R; each pawl assembly is of a known structure and comprises a pawl pin riveted on the end cover plate M4, a torsion spring, a pawl and a clamping ring which are sequentially arranged on the pawl pin, wherein two ends of the torsion spring are respectively clamped on the end cover plate M4 and the pawl; the pawl engages the ratchet 42.
The drive shaft R is supported by bearings mounted on the end cap plate M4; the right end of the drive shaft R is turned with a threaded portion to which a threaded connection check member S, which may be a round nut and a check washer, is screwed, is adjacent to the drive sprocket 51, and in this embodiment a slotted nut with cotter pin is used.
The gear ring 7 is installed on the right side of the right wallboard M2 at intervals through a connecting rod H2, wherein the gear ring 7 is provided with a mounting hole (not marked) for the connecting rod H2 to pass through, an elastic bushing H21 is arranged at a penetrating section of the connecting rod H2 in the mounting hole, and an end cover plate M4 is fixed on the outer end of the connecting rod H2; the drive gear R1 is a single integral part of the drive shaft R.
The elastic bushing is made of polyurethane; the connecting rod H2 has four correspondingly, four elastic bushings H21, connecting rod H2 is fixed on right wallboard M2 through the riveting mode, connecting rod H2 is the three-section structure that the diameter becomes progressively, and its outer end car is threaded, and the diameter thickest section is the interval of ring gear 7 and right wallboard M2 promptly, and end cover board M4 contradicts ring gear 7 outer terminal surface and is fixed through the nut.
The gear ring 7 and the end cover plate M4 jointly form a thin box-type structure, the area of the structure is smaller than that of the left wallboard M1 and the right wallboard M2, the specifications of the left wallboard M1 and the right wallboard M2 are the same, and the area of the auxiliary left wallboard M3 is smaller than that of the left wallboard M1 and the right wallboard M2.
The carrier 8 is composed of a plate body 81 with a central shaft hole (not shown), a necking section 82 with a multi-angle hole (not shown) axially extending from the left side port of the central shaft hole, and at least two carrier gear shafts 83 symmetrically fixed on the plate body 81, wherein the two carrier gear shafts 83 extend into the gear ring 7 and are respectively provided with a carrier gear 9, the central shaft hole of the carrier 8 is sleeved with the left end of the driving shaft R, the necking section 82 is rotatably arranged in a step hole 30 formed by the lifting chain wheel 3, the output shaft L extends out of the lifting chain wheel and the shaft end of the output shaft L is supported by a bearing (not shown) arranged on the auxiliary left wall plate M3, and a multi-angle head L2 matched with the multi-angle hole is arranged at the right end of the output shaft L in the step hole 30 in a turning mode, so that the output shaft L and the carrier 8 are circumferentially fixed.
The polygonal head L2 and the polygonal hole in this embodiment are respectively a hexagonal head and a hexagonal hole, and of course, the right end of the output shaft L may also be fixed with the gap bridge gear frame 8 through a flat key.
The number of the carrier gears 9 is two, the number of the carrier gear shafts 83 is two, of course, the number of the carrier gear shafts 83 can be three, and the three carrier gear shafts 83 are uniformly riveted on the tray plate body 81; the intermediate gear shaft 83 has a shoulder (not shown) adjacent to the inner bottom wall of the ring gear 7, a bushing is provided between the mounting hole of the intermediate gear 9 and the intermediate gear shaft 83, a disc washer K and a shaft retainer ring are provided at the shaft end of the intermediate gear shaft 83, and the intermediate gear 9 is positioned by the shoulder and the shaft retainer ring.
The number of rows of lifting chains arranged on the lifting hoist can be reduced to a single row of lifting chains at least, as shown in fig. 1, the number of the lifting chains G is a single row, and the maximum lifting weight reaches 5 tons.
When the transmission thread of the driving shaft R is matched with the transmission thread of the central hole of the driving hand sprocket 51 and the transmission thread of the central hole of the brake seat 41 by adopting the conventional right-hand transmission thread, an operator stands on the right hand side of fig. 1 and faces the driving hand sprocket 51, and pulls the hand chain 52 to rotate the driving hand sprocket 51 clockwise, the goods are lifted, and when the heavy object needs to be lowered, the driving hand sprocket 51 is rotated anticlockwise.
Claims (3)
1. The utility model provides a tertiary speed reduction transmission of chain block, including the output shaft that the left end has tooth portion, piece tooth minor axis tooth subassembly, the splined hole gear, the lifting sprocket that the left end has external spline portion, ratchet double friction piece formula stopper and the drive hand sprocket that meshes there is the hand chain, rotate the empty cover output shaft of lifting sprocket on left wallboard and right wallboard that sets up, external spline portion stretches out left wallboard, the right-hand member of output shaft is located lifting sprocket, the axle head that its adjacent tooth portion of output shaft rotationally supports on supplementary left wallboard, supplementary left wallboard interval is arranged in the left side of left wallboard, support respectively on left wallboard and supplementary left wallboard with two piece tooth minor axis tooth subassemblies of output shaft parallel arrangement, splined hole gear and lifting sprocket's external spline portion hookup, each piece tooth minor axis tooth subassembly both meshes with the tooth portion of output shaft and meshes with splined hole gear, its characterized in that: the driving mechanism comprises a gear ring arranged on the right side of the right wallboard at intervals, an end cover plate covering the outer end face of the gear ring, a driving shaft rotatably supported on the end cover plate, a driving gear fixedly arranged on the driving shaft, a carrier which is sleeved on the left end of the driving shaft and circumferentially fixed with the right end of the output shaft, and at least two carrier gears symmetrically arranged on the carrier, wherein each carrier gear is externally meshed with the driving gear and internally meshed with the ring gear of the gear ring; the brake and the driving hand chain wheel are sequentially connected to the driving shaft through transmission threads, the driving hand chain wheel is adjacent to the right end of the driving shaft, and a ratchet wheel of the brake is meshed with two pawl assemblies arranged on the end cover plate.
2. The three-stage reduction transmission device of the chain block according to claim 1, wherein: the gear ring is arranged on the right side of the right wallboard at intervals through connecting rods, wherein the gear ring is provided with mounting holes for the connecting rods to pass through, elastic bushings are arranged at the penetrating sections of the connecting rods in the mounting holes, and the end cover plates are fixed on the outer ends of the connecting rods; the drive gear and the drive shaft are a single integral part.
3. The three-stage reduction transmission device of the chain block according to claim 1 or 2, characterized in that: the gear ring and the end cover plate jointly form a thin box-type structure, the area of the gear ring is smaller than that of a left wallboard and a right wallboard, the specifications of the left wallboard and the right wallboard are the same, and the area of the auxiliary left wallboard is smaller than that of the left wallboard and the right wallboard.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810534985.4A CN108516481B (en) | 2018-05-27 | 2018-05-27 | Three-stage speed reduction transmission device of chain block |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810534985.4A CN108516481B (en) | 2018-05-27 | 2018-05-27 | Three-stage speed reduction transmission device of chain block |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108516481A CN108516481A (en) | 2018-09-11 |
| CN108516481B true CN108516481B (en) | 2024-01-19 |
Family
ID=63426794
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810534985.4A Active CN108516481B (en) | 2018-05-27 | 2018-05-27 | Three-stage speed reduction transmission device of chain block |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108516481B (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4836053A (en) * | 1988-05-23 | 1989-06-06 | Chrysler Motors Corporation | Transfer case with dual planetary gear reduction unit |
| DE69732423D1 (en) * | 1996-11-19 | 2005-03-10 | Alexandr Konstantinovi Kamljuk | WINCH, DRIVEN BY THE TRANSMISSION GEAR OF A VEHICLE |
| CN201343410Y (en) * | 2009-02-26 | 2009-11-11 | 杭州欣桥实业有限公司 | Novel level block |
| CN104837760A (en) * | 2012-11-30 | 2015-08-12 | 株式会社开道 | Chain block |
| CN108017000A (en) * | 2018-01-17 | 2018-05-11 | 合肥工业大学 | A kind of Novel hoisting device |
| CN208292552U (en) * | 2018-05-27 | 2018-12-28 | 浙江双鸟机械有限公司 | A kind of three-level speed reduction gearing of chain block |
| CN208361780U (en) * | 2018-05-27 | 2019-01-11 | 浙江双鸟机械有限公司 | The mounting structure of chain block primary speed-down mechanism |
-
2018
- 2018-05-27 CN CN201810534985.4A patent/CN108516481B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4836053A (en) * | 1988-05-23 | 1989-06-06 | Chrysler Motors Corporation | Transfer case with dual planetary gear reduction unit |
| DE69732423D1 (en) * | 1996-11-19 | 2005-03-10 | Alexandr Konstantinovi Kamljuk | WINCH, DRIVEN BY THE TRANSMISSION GEAR OF A VEHICLE |
| CN201343410Y (en) * | 2009-02-26 | 2009-11-11 | 杭州欣桥实业有限公司 | Novel level block |
| CN104837760A (en) * | 2012-11-30 | 2015-08-12 | 株式会社开道 | Chain block |
| CN108017000A (en) * | 2018-01-17 | 2018-05-11 | 合肥工业大学 | A kind of Novel hoisting device |
| CN208292552U (en) * | 2018-05-27 | 2018-12-28 | 浙江双鸟机械有限公司 | A kind of three-level speed reduction gearing of chain block |
| CN208361780U (en) * | 2018-05-27 | 2019-01-11 | 浙江双鸟机械有限公司 | The mounting structure of chain block primary speed-down mechanism |
Also Published As
| Publication number | Publication date |
|---|---|
| CN108516481A (en) | 2018-09-11 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US3265362A (en) | Hoisting devices | |
| CN100501110C (en) | Dynamic synchronous lifting device for lifting platform | |
| CN106976812B (en) | No-load and on-load lifting speed changing mechanism of chain block | |
| DE102011050447A1 (en) | Gear unit with one or two gears, optional for bicycles or for trailer bicycles | |
| WO2017032222A1 (en) | Differential planetary reducer for crane | |
| CN101046242A (en) | Closed planetary gear reducer | |
| CN208292552U (en) | A kind of three-level speed reduction gearing of chain block | |
| US2464890A (en) | Planetary drive gearing | |
| CN201747870U (en) | Walking speed reducer for crane | |
| CN108516481B (en) | Three-stage speed reduction transmission device of chain block | |
| CN204784465U (en) | A arc tooth bevel gear pair for 3 tons of fork truck reduction gear assemblies | |
| CN203257994U (en) | Two-stage planetary center transmission mill speed reducer | |
| CN101808866A (en) | Supporting device | |
| CN2882909Y (en) | Chain wheel transmission wrench | |
| CN201777317U (en) | Automotive spare tire lifter | |
| CN211733701U (en) | Double-speed-ratio speed reducer for coal mine hoisting winch | |
| CN206872323U (en) | A kind of chain block is unloaded, band carries lifting speed mapping device | |
| CN216807709U (en) | Differential mechanism for elevator | |
| CN101717056A (en) | Manual lifting variable-angle device | |
| CN101168429A (en) | Non-load fast lifting hand pulling block | |
| CN209943235U (en) | Single-action swing oil cylinder capable of being interchanged from left to right | |
| CN201053222Y (en) | Dynamic synchronization lifting device for lifting platform | |
| CN213839497U (en) | Planetary speed reducer with flexible uniform load | |
| CN214033867U (en) | Novel axle assembly of full-hydraulic wheel type excavator | |
| CN214578270U (en) | Direct-drive spline gear shaft for rotary oil cylinder |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |