CN101973385A - Self-lubricating system for full rotational rudder propeller - Google Patents
Self-lubricating system for full rotational rudder propeller Download PDFInfo
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- CN101973385A CN101973385A CN2010105220635A CN201010522063A CN101973385A CN 101973385 A CN101973385 A CN 101973385A CN 2010105220635 A CN2010105220635 A CN 2010105220635A CN 201010522063 A CN201010522063 A CN 201010522063A CN 101973385 A CN101973385 A CN 101973385A
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Abstract
The invention relates to a self-lubricating system for a full rotational rudder propeller. The self-lubricating system comprises a shell assembly and a transmission mechanism, wherein the shell assembly is integrally sealed, and the transmission mechanism comprises an input short shaft and a power shaft which are horizontally arranged on the upper part, a vertically arranged vertical shaft in the middle and a propeller shaft horizontally arranged on the lower part; the input short shaft and the power shaft are connected through a clutch; and the power shaft, the vertical shaft and the propeller shaft are in engaged transmission through a bevel gear. The self-lubricating system is characterized in that: a spiral sleeve is fixedly sleeved on the vertical shaft; an oil return passage is formed in the axial center inside the vertical shaft; an oil return joint is arranged at an upper port of the oil return passage and is communicated with an oil tank which is arranged on the top of the shell assembly through an oil return pipe; an overflow pipe with a certain height is arranged inside the oil tank; and a lower pipe port of the overflow pipe is communicated with the shell assembly. The self-lubricating system has an ingenious and reasonable structure, provides cyclic power for lubricating oil through a thread bushing rotating at a high speed so as to fully lubricate the transmission mechanism, and simultaneously contributes to internal heat dissipation of the transmission mechanism.
Description
Technical field
The present invention relates to a kind of later-model marine propulsion, specifically is a kind of self lubricating system of Full Rotary rudder oar of oar rudder unification.
Background technology
Rudder and oar are the chief components of marine propuision system, and rudder is used to control the direct of travel of boats and ships, and oar provides propelling thrust for advancing of boats and ships.In the prior art, oar on the boats and ships and rudder are each self-separations, work in combination, there are following several shortcomings in the course of the work in it: the angle that (1), rudder rotate can not put in place in some cases fully, can't obtain maximum thrust and steerage, the road-holding property of boats and ships, manoevreability deficiency.(2) high-power, high-revolving rudder oar power drive shaft ties up to the problems such as torsion oscillations, rotary vibration and system's heating that exist in service, influences the working stability and the service life of transmission shafting.(3) design of high-power, high strength spiral bevel gear, manufacturing require highly, accuracy requires high, the manufacturing cost costliness.
For the machine of high-speed operation, lubricating system is indispensable.What in general, the lubricated normally mode by oil bath or spray of parts was lubricated in the equipment.For making lubricating oil produce circulation, blwr need be set usually power is provided.
Summary of the invention
The objective of the invention is to overcome the deficiencies in the prior art, the self lubricating system of the ingenious rational Full Rotary rudder oar of a kind of structure is provided, provide the blwr of circulation power to be arranged on rudder oar inside to lubricating oil in this self lubricating system, it is lubricated fully to bring for whole rudder oar.
According to technical scheme provided by the invention: the self lubricating system of Full Rotary rudder oar, described Full Rotary rudder oar comprises housing assembly and is installed in the interior transmission device of housing assembly, described housing assembly integral sealing, described transmission device comprises the vertical shaft of the horizontally disposed input minor axis on top and dynamical axis, middle vertical setting and the horizontally disposed prop shaft of bottom, input minor axis and dynamical axis connect by power-transfer clutch, pass through the bevel gear engaged transmission between dynamical axis, vertical shaft and the prop shaft; It is characterized in that: suit is fixed with and follows the screw-casing that vertical shaft rotates synchronously on the described vertical shaft, axial centre in the vertical shaft offers drainback passage, the upper port of drainback passage is equipped with the back leakage connection that is communicated with it, back leakage connection is communicated in the fuel tank that is arranged on the housing assembly top by oil return pipe, overflow pipe with certain altitude is installed in the described fuel tank, and the lower end mouth of pipe of overflow pipe is communicated in the housing assembly.
As a further improvement on the present invention, described housing assembly comprises input shaft bearing, power-transfer clutch casing, upper gear box, rudder pipe, return bend, lower box and lower tooth roller box, the input shaft bearing is installed on the power-transfer clutch casing, the input minor axis is contained in the input shaft bearing by bearing assembly, and the inner of input minor axis connects with power-transfer clutch; The power-transfer clutch casing is installed on the upper gear box, and dynamical axis utilizes the bearing assembly level to be installed in the upper gear box, and dynamical axis one end connects with power-transfer clutch, and the part that dynamical axis is positioned at upper gear box is set with the top box driving bevel gear; Described fuel tank is arranged on the top of upper gear box, and the lower end mouth of pipe of the overflow pipe in the fuel tank is communicated in the upper gear box; Bottom at upper gear box is equipped with middle bearing bracket, and the top of vertical shaft is installed in the middle bearing bracket by bearing assembly, and the vertical shaft upper end is stretched in the upper gear box and the passive bevel gear of top box, passive bevel gear of top box and top box driving bevel gear engaged transmission are installed; Be outside equipped with swing bearing at middle bearing bracket, the outer ring of swing bearing is bearing on the rudder pipe that encloses well, captives joint with upper gear box in the outer ring of swing bearing; The inner ring of swing bearing drives by rotary motor and rotates, and the inner ring bottom of swing bearing is connected with the pivoting support flange, and the return bend upper end is connected pivoting support flange bottom, and return bend is contained in the rudder pipe by cylindrical bearing; The return bend lower end connects lower box by rotary flange, and the lower box bottom connects the lower tooth roller box, and the bottom of described vertical shaft is installed in the lower box by bearing assembly, and the lower end of vertical shaft is stretched in the lower tooth roller box and is provided with nowel transmission bevel gear; Described prop shaft is installed in the lower tooth roller box by bearing assembly, and the passive bevel gear of nowel is installed on the prop shaft, passive bevel gear of nowel and nowel transmission bevel gear engaged transmission.
As a further improvement on the present invention, described vertical shaft comprises tween drive shaft, vertical teeth wheel shaft and coupling body, and coupling body comprises first external tooth cover, attachment tooth cover, second external tooth cover; First external tooth cover is sleeved on tween drive shaft lower end and fixing, and the first external tooth cover outer peripheral face is provided with external tooth; Second external tooth cover is sleeved on vertical teeth wheel shaft upper end and fixing, the second external tooth cover outer peripheral face is provided with external tooth, the upper and lower side correspondence of attachment tooth cover is sleeved on the bottom of tween drive shaft and the upper end of vertical teeth wheel shaft, the attachment tooth cover inner peripheral surface at two ends up and down is provided with internal tooth, this internal tooth respectively with the external tooth engaged transmission of first external tooth cover, the second external tooth cover outer peripheral face; Described screw-casing is arranged in the rotary flange, and the screw-casing suit is fixed on attachment tooth and puts; The axial centre of described tween drive shaft and vertical teeth wheel shaft offers drainback passage and following drainback passage respectively, and last drainback passage and following drainback passage are connected, and constitute described drainback passage.
As a further improvement on the present invention, described rotary motor is installed on the upper gear box, and the output shaft of rotary motor is equipped with driving gear, is provided with rotary teeth on the inner ring of swing bearing, rotary teeth and driving gear engaged transmission.
As a further improvement on the present invention, cone-shaped is arranged in the bottom of described tween drive shaft, and first external tooth cover is sleeved on the tween drive shaft lower end and utilizes keep plate to compress, and interference type is fixed on the tween drive shaft; Cone-shaped is arranged in the upper end of described vertical teeth wheel shaft, and second external tooth cover is sleeved on vertical teeth wheel shaft upper end and utilizes pressing plate to compress, and interference type is fixed on the vertical teeth wheel shaft.
The present invention compared with prior art, advantage is: structure is ingenious rationally, screw collar is fixed on the vertical shaft and follows vertical shaft and rotate synchronously, the screw collar of high speed revolution provides circulation power to lubricating oil, make lubricating oil carry out sufficient lubrication, help the internal heat dissipating of transmission device simultaneously the transmission device in the housing assembly.
Description of drawings
Fig. 1 is the structural representation of the embodiment of the invention.
Fig. 2 is that A among Fig. 1 is to partial view.
The specific embodiment
The invention will be further described below in conjunction with concrete drawings and Examples.
As shown in the figure, the present invention relates to the self lubricating system of Full Rotary rudder oar.Described Full Rotary rudder oar comprises housing assembly and is installed in the interior transmission device of housing assembly; Described housing assembly integral sealing, described transmission device comprise the vertical shaft of the horizontally disposed input minor axis 1 on top and dynamical axis 5, middle vertical setting and the horizontally disposed prop shaft 32 of bottom.Input minor axis 1 and dynamical axis 5 connect by power-transfer clutch 3, pass through the bevel gear engaged transmission between dynamical axis 5, vertical shaft and the prop shaft 32.Suit is fixed with and follows the screw-casing 26 that vertical shaft rotates synchronously on the described vertical shaft, axial centre in the vertical shaft offers drainback passage, the upper port of drainback passage is equipped with the back leakage connection 11 that is communicated with it, and back leakage connection 11 is communicated in the fuel tank 8 that is arranged on the housing assembly top (as shown in Figure 2) by oil return pipe 10.Overflow pipe 9 with certain altitude is installed in the described fuel tank 8, and the lower end mouth of pipe of overflow pipe 9 is communicated in the housing assembly.
As shown in Figure 1, housing assembly among the embodiment mainly is made up of input shaft bearing 2, power-transfer clutch casing 4, upper gear box 6, rudder pipe 18, return bend 22, lower box 28 and lower tooth roller box (34), input shaft bearing 2 is installed on the power-transfer clutch casing 4, input minor axis 1 is contained in the input shaft bearing 2 by bearing assembly, and the inner of input minor axis 1 connects with power-transfer clutch 3.Power-transfer clutch casing 4 is installed on the upper gear box 6, and dynamical axis 5 utilizes the bearing assembly level to be installed in the upper gear box 6, and dynamical axis 5 one ends connect with power-transfer clutch 3, and the part that dynamical axis 5 is positioned at upper gear box 6 is set with top box driving bevel gear 7.Described fuel tank 8 is arranged on the top of upper gear box 6, and the lower end mouth of pipe of the overflow pipe 9 in the fuel tank 8 is communicated in the upper gear box 6.In the bottom of upper gear box 6 middle bearing bracket 13 is installed, the top of vertical shaft is installed in the middle bearing bracket 13 by bearing assembly, the vertical shaft upper end is stretched in the upper gear box 6 and the passive bevel gear 12 of top box is installed, passive bevel gear 12 of top box and top box driving bevel gear 7 engaged transmission.Be outside equipped with swing bearing 16 at middle bearing bracket 13, the outer ring of swing bearing 16 is bearing on the rudder pipe 18 that encloses well 17, captives joint with upper gear box 6 in the outer ring of swing bearing 16.The inner ring of swing bearing 16 drives by rotary motor 14 and rotates, described rotary motor 14 is installed on the upper gear box 6, the output shaft of rotary motor 14 is equipped with driving gear 15, is provided with rotary teeth on the inner ring of swing bearing 16, rotary teeth and driving gear 15 engaged transmission.The inner ring bottom of swing bearing 16 is connected with pivoting support flange 19, and return bend 22 upper ends are connected pivoting support flange 19 bottoms, and return bend 22 is contained in the rudder pipe 18 by cylindrical bearing 23.Return bend 22 lower ends connect lower box 28 by rotary flange 35, lower box 28 bottoms connect lower tooth roller box 34, the bottom of described vertical shaft is installed in the lower box 28 by bearing assembly, and the lower end of vertical shaft is stretched in the lower tooth roller box 34 and is provided with nowel transmission bevel gear 31.Described prop shaft 32 is installed in the lower tooth roller box 34 by bearing assembly, and the passive bevel gear 33 of nowel is installed on the prop shaft 32, passive bevel gear 33 of nowel and nowel transmission bevel gear 31 engaged transmission.
As shown in Figure 1, the vertical shaft in the present embodiment mainly is made up of tween drive shaft 20, vertical teeth wheel shaft 29 and coupling body.Coupling body comprises that first external tooth cover 24, attachment tooth cover 25, second external tooth cover 27, the first external tooth covers 24 are sleeved on tween drive shaft 20 lower ends and fixing, and first external tooth cover, 24 outer peripheral faces are provided with external tooth; Second external tooth cover 27 is sleeved on vertical teeth wheel shaft 29 upper ends and fixing, second external tooth cover, 27 outer peripheral faces are provided with external tooth, the upper and lower side correspondence of attachment tooth cover 25 is sleeved on the bottom of tween drive shaft 20 and the upper end of vertical teeth wheel shaft 29, attachment tooth cover about in the of 25 the inner peripheral surface at two ends be provided with internal tooth, this internal tooth respectively with the external tooth engaged transmission of first external tooth cover 24, second external tooth cover, 27 outer peripheral faces.Described screw-casing 26 is arranged in the rotary flange 35, and screw-casing 26 suits are fixed on the attachment tooth cover 25; The axial centre of described tween drive shaft 20 and vertical teeth wheel shaft 29 offers drainback passage 21 and following drainback passage 30 respectively, and last drainback passage 21 and following drainback passage 30 are connected, and constitute described drainback passage.
As shown in Figure 1, in order to ensure the intensity of tween drive shaft 20, vertical teeth wheel shaft 29 and longer service life, described tween drive shaft 20, vertical teeth wheel shaft 29 all adopt keyless.Cone-shaped is arranged in the bottom of described tween drive shaft 20, and first external tooth cover 24 is sleeved on tween drive shaft 20 lower ends and utilizes keep plate to compress, and interference type is fixed on the tween drive shaft 20; Cone-shaped is arranged in the upper end of described vertical teeth wheel shaft 29, and second external tooth cover 27 is sleeved on vertical teeth wheel shaft 29 upper ends and utilizes pressing plate to compress, and interference type is fixed on the vertical teeth wheel shaft 29.
As shown in Figure 1, the rotary motor 14 in the present embodiment is installed on the upper gear box 6, and the output shaft of rotary motor 14 is equipped with driving gear 15, is provided with rotary teeth on the inner ring of swing bearing 16, rotary teeth and driving gear 15 engaged transmission.
Working process of the present invention and principle of work are as follows:
During the work of rudder oar, power plant (as diesel engine) drives input minor axis 1 and rotates, input minor axis 1 drives dynamical axiss 5 by power-transfer clutch 3 and rotates, the top box driving bevel gear 7 on the dynamical axis 5 rotate and with tween drive shaft 20 on passive bevel gear 12 engaged transmission of top box, thereby tween drive shaft 20 is rotated; Tween drive shaft 20 drives vertical teeth wheel shaft 29 by coupling body and rotates, passive bevel gear 33 engaged transmission of nowel of installing on nowel transmission bevel gear 31 that install vertical teeth wheel shaft 29 lower ends and the prop shaft 32; Rotate thereby order about prop shaft 32 and propelling screws, provide power to boats and ships.
Be full of lubricating oil in the described housing assembly, in above-mentioned rudder oar working process, tween drive shaft 20 and vertical teeth wheel shaft 29 drive screw-casing 26 high speed revolutions that are sleeved on the attachment tooth cover 25 when rotating, thereby the lubricating oil in the housing assembly is produced downward pressure, lubricating oil is under pressure via following drainback passage 30, last drainback passage 21 and oil return pipe 10 are got back in the fuel tank 8 at housing assembly top, continuous increase along with lubricants capacity in the fuel tank 8, the lubricating oil liquid level raises gradually, when the lubricating oil liquid level exceeds the height of overflow pipe 9, lubricating oil enters in the housing assembly from overflow pipe 9 again, thereby realized circulating of lubricating oil, transmission device in the housing assembly is carried out sufficient lubrication, help the internal heat dissipating of transmission device simultaneously.
Claims (5)
1. the self lubricating system of Full Rotary rudder oar, described Full Rotary rudder oar comprises housing assembly and is installed in the interior transmission device of housing assembly, described housing assembly integral sealing, described transmission device comprises the vertical shaft of the horizontally disposed input minor axis (1) on top and dynamical axis (5), middle vertical setting and the horizontally disposed prop shaft (32) of bottom, input minor axis (1) and dynamical axis (5) connect by power-transfer clutch (3), pass through the bevel gear engaged transmission between dynamical axis (5), vertical shaft and the prop shaft (32); It is characterized in that: suit is fixed with and follows the screw-casing (26) that vertical shaft rotates synchronously on the described vertical shaft, axial centre in the vertical shaft offers drainback passage, the upper port of drainback passage is equipped with the back leakage connection (11) that is communicated with it, back leakage connection (11) is communicated in the fuel tank (8) that is arranged on the housing assembly top by oil return pipe (10), overflow pipe (9) with certain altitude is installed in the described fuel tank (8), and the lower end mouth of pipe of overflow pipe (9) is communicated in the housing assembly.
2. the self lubricating system of Full Rotary rudder oar as claimed in claim 1, it is characterized in that: described housing assembly comprises input shaft bearing (2), power-transfer clutch casing (4), upper gear box (6), rudder pipe (18), return bend (22), lower box (28) and lower tooth roller box (34), input shaft bearing (2) is installed on the power-transfer clutch casing (4), input minor axis (1) is contained in the input shaft bearing (2) by bearing assembly, and the inner of input minor axis (1) connects with power-transfer clutch (3); Power-transfer clutch casing (4) is installed on the upper gear box (6), dynamical axis (5) utilizes the bearing assembly level to be installed in the upper gear box (6), dynamical axis (5) one ends connect with power-transfer clutch (3), and the part that dynamical axis (5) is positioned at upper gear box (6) is set with top box driving bevel gear (7); Described fuel tank (8) is arranged on the top of upper gear box (6), and the lower end mouth of pipe of the overflow pipe (9) in the fuel tank (8) is communicated in the upper gear box (6); In the bottom of upper gear box (6) middle bearing bracket (13) is installed, the top of vertical shaft is installed in the middle bearing bracket (13) by bearing assembly, the vertical shaft upper end is stretched in the upper gear box (6) and the passive bevel gear of top box (12) is installed, passive bevel gear of top box (12) and top box driving bevel gear (7) engaged transmission; Be outside equipped with swing bearing (16) at middle bearing bracket (13), the outer ring of swing bearing (16) is bearing on the rudder pipe (18) that encloses well (17), captives joint with upper gear box (6) in the outer ring of swing bearing (16); The inner ring of swing bearing (16) drives by rotary motor (14) and rotates, the inner ring bottom of swing bearing (16) is connected with pivoting support flange (19), return bend (22) upper end is connected pivoting support flange (19) bottom, and return bend (22) is contained in the rudder pipe (18) by cylindrical bearing (23); Return bend (22) lower end connects lower box (28) by rotary flange (35), lower box (28) bottom connects lower tooth roller box (34), the bottom of described vertical shaft is installed in the lower box (28) by bearing assembly, and the lower end of vertical shaft is stretched in the lower tooth roller box (34) and is provided with nowel transmission bevel gear (31); Described prop shaft (32) is installed in the lower tooth roller box (34) by bearing assembly, and the passive bevel gear of nowel (33) is installed on the prop shaft (32), passive bevel gear of nowel (33) and nowel transmission bevel gear (31) engaged transmission.
3. the self lubricating system of Full Rotary rudder oar as claimed in claim 2, it is characterized in that: described vertical shaft comprises tween drive shaft (20), vertical teeth wheel shaft (29) and coupling body, and coupling body comprises first external tooth cover (24), attachment tooth cover (25), second external tooth cover (27); First external tooth cover (24) is sleeved on tween drive shaft (20) lower end and fixing, and first external tooth cover (24) outer peripheral face is provided with external tooth; Second external tooth cover (27) is sleeved on vertical teeth wheel shaft (29) upper end and fixing, second external tooth cover (27) outer peripheral face is provided with external tooth, the upper and lower side correspondence of attachment tooth cover (25) is sleeved on the bottom of tween drive shaft (20) and the upper end of vertical teeth wheel shaft (29), attachment tooth cover (25) inner peripheral surface at two ends up and down is provided with internal tooth, this internal tooth respectively with the external tooth engaged transmission of first external tooth cover (24), second external tooth cover (27) outer peripheral face; Described screw-casing (26) is arranged in the rotary flange (35), and screw-casing (26) suit is fixed on the attachment tooth cover (25); The axial centre of described tween drive shaft (20) and vertical teeth wheel shaft (29) offers drainback passage (21) and following drainback passage (30) respectively, and last drainback passage (21) and following drainback passage (30) are connected, and constitute described drainback passage.
4. the self lubricating system of Full Rotary rudder oar as claimed in claim 2, it is characterized in that: described rotary motor (14) is installed on the upper gear box (6), the output shaft of rotary motor (14) is equipped with driving gear (15), on the inner ring of swing bearing (16), be provided with rotary teeth, rotary teeth and driving gear (15) engaged transmission.
5. the self lubricating system of Full Rotary rudder oar as claimed in claim 3, it is characterized in that: cone-shaped is arranged in the bottom of described tween drive shaft (20), first external tooth cover (24) is sleeved on tween drive shaft (20) lower end and utilizes keep plate to compress, and interference type is fixed on the tween drive shaft (20); Cone-shaped is arranged in the upper end of described vertical teeth wheel shaft (29), and second external tooth cover (27) is sleeved on vertical teeth wheel shaft (29) upper end and utilizes pressing plate to compress, and interference type is fixed on the vertical teeth wheel shaft (29).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010105220635A CN101973385A (en) | 2010-10-28 | 2010-10-28 | Self-lubricating system for full rotational rudder propeller |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010105220635A CN101973385A (en) | 2010-10-28 | 2010-10-28 | Self-lubricating system for full rotational rudder propeller |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101973385A true CN101973385A (en) | 2011-02-16 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010105220635A Pending CN101973385A (en) | 2010-10-28 | 2010-10-28 | Self-lubricating system for full rotational rudder propeller |
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| Country | Link |
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| CN (1) | CN101973385A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102837815A (en) * | 2012-08-27 | 2012-12-26 | 苏州船用动力系统股份有限公司 | Oil thrower structure for transferring lubricating oil for steering oar |
| CN104024103A (en) * | 2011-12-28 | 2014-09-03 | 瓦锡兰芬兰有限公司 | A method of and an arrangement for improving the lubrication system of a propulsion device of a marine vessel |
| CN104179951A (en) * | 2014-08-08 | 2014-12-03 | 苏州苏净船用机械有限公司 | Lubricating cooling device for steering oar |
| CN117780862A (en) * | 2024-02-23 | 2024-03-29 | 洛阳隆达轴承有限公司 | High-precision double-worm rotary driving device |
| CN117780862B (en) * | 2024-02-23 | 2024-05-31 | 洛阳隆达轴承有限公司 | High-precision double-worm rotary driving device |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3896757A (en) * | 1970-10-07 | 1975-07-29 | Rendell Tractor & Equipment Co | Rotatable downwardly directed driveline |
-
2010
- 2010-10-28 CN CN2010105220635A patent/CN101973385A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3896757A (en) * | 1970-10-07 | 1975-07-29 | Rendell Tractor & Equipment Co | Rotatable downwardly directed driveline |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104024103A (en) * | 2011-12-28 | 2014-09-03 | 瓦锡兰芬兰有限公司 | A method of and an arrangement for improving the lubrication system of a propulsion device of a marine vessel |
| CN104024103B (en) * | 2011-12-28 | 2016-04-06 | 瓦锡兰芬兰有限公司 | For improvement of the method and apparatus of the lubricating system of the propelling unit of boats and ships |
| CN102837815A (en) * | 2012-08-27 | 2012-12-26 | 苏州船用动力系统股份有限公司 | Oil thrower structure for transferring lubricating oil for steering oar |
| CN104179951A (en) * | 2014-08-08 | 2014-12-03 | 苏州苏净船用机械有限公司 | Lubricating cooling device for steering oar |
| CN117780862A (en) * | 2024-02-23 | 2024-03-29 | 洛阳隆达轴承有限公司 | High-precision double-worm rotary driving device |
| CN117780862B (en) * | 2024-02-23 | 2024-05-31 | 洛阳隆达轴承有限公司 | High-precision double-worm rotary driving device |
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Application publication date: 20110216 |