CN104401863A - Escalator transmission mechanism and assembly method - Google Patents
Escalator transmission mechanism and assembly method Download PDFInfo
- Publication number
- CN104401863A CN104401863A CN201410698769.5A CN201410698769A CN104401863A CN 104401863 A CN104401863 A CN 104401863A CN 201410698769 A CN201410698769 A CN 201410698769A CN 104401863 A CN104401863 A CN 104401863A
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- CN
- China
- Prior art keywords
- sprocket wheel
- hole
- round
- main shaft
- transmission device
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- 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.)
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
- B66B23/00—Component parts of escalators or moving walkways
- B66B23/02—Driving gear
- B66B23/04—Driving gear for handrails
- B66B23/06—Driving gear for handrails with means synchronising the operation of the steps or the carrying belts and the handrails
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
- B66B23/00—Component parts of escalators or moving walkways
- B66B23/02—Driving gear
- B66B23/026—Driving gear with a drive or carrying sprocket wheel located at end portions
Landscapes
- Escalators And Moving Walkways (AREA)
- Gears, Cams (AREA)
Abstract
The invention discloses a transmission mechanism and an assembly method. The transmission mechanism comprises a main shaft, a first chain wheel and a second chain wheel, wherein the first chain wheel is provided with a first wheel through hole, the first chain wheel is sleeved on the main shaft through the first wheel through hole, and the edge of the first wheel through hole is fixedly welded with the main shaft; and the second chain wheel is provided with a second wheel through hole, the second chain wheel is sleeved on the main shaft through the second wheel through hole, second fixing holes which are opposite to each other are formed in the first chain wheel and the second chain wheel, and second wheel fasteners stretch into the second wheel fixing holes to fix the second chain wheel on the first chain wheel. The transmission mechanism has a simple structure and is convenient and reliable in machining and assembly of parts, the space occupied by the transmission mechanism can be effectively reduced, and production and installation costs are significantly reduced.
Description
Technical field
The invention belongs to gearing field, be specifically related to a kind of transmission device and assembly method.
Background technology
The escalator of conventional confguration and moving sidewalk upper end sprocket wheel generally include the formations such as bearing seat, ladder sprocket wheel, drive sprocket, handrail drive sprocket, wheel hub (flange), wherein wheel hub (flange) heat enters or is welded on main shaft, drive sprocket and handrail drive sprocket are assemblied on wheel hub (flange), in order to ensure that the heat of wheel hub (flange) enters intensity or weld strength, wheel hub and main shaft volume are comparatively large, material and tooling cost higher.
In addition, along with the enforcement of GB16899-2011 " manufacture of escalator and moving sidewalk and installation code ", additional brake is as the safety component of escalator and moving sidewalk, more and more receive the concern of escalator and moving sidewalk manufacturing firm, for having the escalator of additional brake function, the brake assemblies of additional brake is generally arranged on the upper end sprocket wheel of actuating device as an individual component by current art, cause whole upper end chain sprocket structure complicated, assembling difficulty, cost is high, take up room larger, field maintemance difficulty.
Summary of the invention
Based on this, the present invention discloses a kind of transmission device and assembly method, and its structure is simple, and each part processing and convenient and reliable assembly, can effectively reduce the space that transmission device takies, significantly reduce production, cost of installation.
Its technical scheme is as follows:
A kind of transmission device, comprising:
Main shaft; First sprocket wheel, the first sprocket wheel has first round through hole, and the first sprocket wheel is set on main shaft by first round through hole, and first round through hole edge and main shaft are welded and fixed; Second sprocket wheel, second sprocket wheel has second to take turns through hole, and the second sprocket wheel is taken turns through hole by second and is set on main shaft, and the second sprocket wheel and the first sprocket wheel are provided with second of mutual Corresponding matching and take turns fixed orifice, second takes turns fastener stretches into second and takes turns in fixed orifice, is fixed on the first sprocket wheel by the second sprocket wheel.
A kind of transmission device assembly method, comprising:
First sprocket wheel blank is carried out to the processing of gear hobbing process, both ends of the surface prtreatment and unthreaded hole, the first sprocket wheel is set on main shaft by first round through hole, first round through hole edge and main shaft are welded and fixed; Carry out fine limit work to the contact surface that the first sprocket wheel contacts with the second sprocket wheel, installation second is taken turns fastener and is taken turns in fixed orifice in second, is fixed on the first sprocket wheel by the second sprocket wheel.
Below further technical scheme is described:
Described transmission device is preferably:
Described second takes turns fastener comprises articulation bolt and bolt, and described second takes turns fixed orifice comprises articulation hole and unthreaded hole, and described articulation hole coordinates with described articulation bolt articulation, and described unthreaded hole mates with described bolt.
Described second to take turns one end that through hole contacts with described first sprocket wheel horn-like for extending out.
Also comprise the 3rd sprocket wheel, described 3rd sprocket wheel and described first sprocket wheel have the third round fixed orifice of mutual Corresponding matching, third round fastener stretches in described third round fixed orifice, is fixed on described first sprocket wheel by described 3rd sprocket wheel.
Described 3rd sprocket wheel has third round through hole, described second sprocket wheel is provided with protuberance, described third round through hole cross section is greater than described protuberance cross section, described protuberance through described third round through hole and described first sprocket wheel against, described protuberance has described second to take turns fixed orifice, described second takes turns fastener takes turns fixed orifice and described third round through hole through described second, is fixed on described first sprocket wheel by described second sprocket wheel.
Described second sprocket wheel has Long Circle through hole, and described Long Circle lead to the hole site is corresponding with described third round fixed orifice, and described Long Circle through hole cross section is greater than described third round fastener cross section.
Described transmission device assembly method is preferably:
On unthreaded hole after hold-down bolt, align reaming processing is carried out to the articulation hole on the first sprocket wheel, the second sprocket wheel, articulation bolt and bolt are installed, the second sprocket wheel is installed on the first sprocket wheel.
Before align reaming processing is carried out to the first sprocket wheel and the second sprocket wheel, the 3rd sprocket wheel is set on described first sprocket wheel, the second sprocket wheel protuberance is set on main shaft through third round through hole, and against the first sprocket wheel.
After installing the second sprocket wheel, by the Long Circle through hole on described second sprocket wheel, by third round fastener through described third round fixed orifice, described 3rd sprocket wheel is installed on described first sprocket wheel.
Below the advantage of preceding solution or principle are described:
1, the first sprocket wheel is directly welded on main shaft, second sprocket wheel, the 3rd sprocket wheel use articulation bolt or bolt to be mounted on the first sprocket wheel, compared with conventional drives, eliminate the transition piece (wheel hub or flange) installed on main shaft, first sprocket wheel comprises the effect of excessive attaching parts, welding manner is used to fix the first sprocket wheel, replace the assembling mode that traditional transition piece heat enters main shaft, reduce the diameter of axle of main shaft, reduce the volume of whole transmission device, significantly reduce the production of transmission device, transport, assembly cost.
2, gear hobbing process, the prtreatment of both ends of the surface and the processing of bolt installation unthreaded hole is only carried out before the first sprocket wheel welding, be welded to after on main shaft until the first sprocket wheel, again fine limit work is carried out to the relevant fitting surface of the first sprocket wheel, simple to operate, easy to process, and the adverse effect that after avoiding sprocket wheel to weld, distortion produces.
3, by the second sprocket wheel that load is large, adopt articulation bolt and plain bolt to be connected to the mode of the first sprocket wheel, articulation bolt bears shearing load, and tensile load born by plain bolt simultaneously, ensures the Joint strenght between two-wheeled, improves safety; Articulation bolt and plain bolt are uniformly distributed in a circumferential direction, stress equalization, ensure that transmission device operates steadily, can increase the service life.
4, second to take turns through hole with main shaft be that small―gap suture coordinates, and part load can being passed on the higher main shaft of intensity by during load, second takes turns through hole contacts one end for extending out bell mouth shape with the first sprocket wheel, plays directional tagging when suit the second sprocket wheel, is convenient to install; Simultaneously, steady and accurate for ensureing that transmission device runs, after first sprocket wheel and the second sprocket interface require to carry out fine limit work, high precision coordinates, because the first sprocket wheel is set on main shaft by first round through hole, need to be welded and fixed first round through hole edge and main shaft, outer bell mouth expanding can hold the weld zone of the first sprocket wheel and main shaft, avoids impacting the setting accuracy of the first sprocket wheel and the second sprocket wheel, also avoids contact weld part to cause weld zone to damage and causes safety misadventure.
5, transmission device is used in the chain sprocket structure of elevator upper end, and the first sprocket wheel drives step, the second sprocket wheel external drive, 3rd sprocket wheel drives handrail, 3rd sprocket wheel is installed between the first sprocket wheel and the second sprocket wheel, meets elevator structure design, reduces upper end chain sprocket structure volume; Simultaneously, 3rd sprocket wheel has third round through hole, second sprocket wheel is provided with protuberance, third round through hole cross section is greater than protuberance cross section, second sprocket wheel protuberance passes the 3rd sprocket wheel through hole against the first sprocket wheel, ensure the second sprocket wheel can with the first sprocket interface precision-fit, improve transmission device operational security stationarity.
6, the second sprocket wheel has Long Circle through hole, Long Circle lead to the hole site is corresponding with third round fixed orifice, Long Circle through hole cross section is greater than third round fastener cross section, Long Circle through hole can pass the instrument of third round fastener and handling third round fastener, for loading and unloading the 3rd sprocket wheel, observing the 3rd sprocket wheel situation or safeguard the 3rd sprocket wheel; In addition, the second sprocket wheel is provided with Long Circle through hole and can reduces weight, be convenient to carrying and installation, saves material simultaneously, reduces costs.
7, stressed the 3rd little sprocket wheel adopts casting, is installed on the first sprocket wheel, reduces transmission device material and tooling cost by plain bolt.
Accompanying drawing explanation
Fig. 1 is the constructional drawing of the embodiment of the present invention one transmission device;
Fig. 2 is the assembly drowing of the first sprocket wheel and main shaft in the embodiment of the present invention one;
Fig. 3 is the first chain sprocket structure figure in the embodiment of the present invention one;
Fig. 4 is the constructional drawing of the second sprocket wheel in the embodiment of the present invention one;
Fig. 5 is the lateral plan of Fig. 4;
Fig. 6 is the constructional drawing of the 3rd sprocket wheel in the embodiment of the present invention one;
Fig. 7 is the lateral plan of Fig. 6;
Fig. 8 is the constructional drawing of the embodiment of the present invention two transmission device.
Description of reference numerals:
1, the first sprocket wheel, 11, first round through hole, the 2, second sprocket wheel, 21, second through hole is taken turns, 22, unthreaded hole, 23, articulation hole, 24, Long Circle through hole, 25, protuberance, 26, articulation bolt, 27, bolt, the 3, the 3rd sprocket wheel, 31, third round through hole, 32, third round fixed orifice, 4, main shaft, the 5, the 4th sprocket wheel, the 6, the 5th sprocket wheel.
Detailed description of the invention
Below embodiments of the invention are described in detail:
Embodiment one
As shown in Figures 1 to 7, main shaft 4 has boss, and for positioning the first sprocket wheel 1, the first sprocket wheel 1 has first round through hole, first sprocket wheel 1 to be set on main shaft 4 by first round through hole 11 and against boss, is welded and fixed the edge at first round through hole 11 two ends and main shaft 4.
3rd sprocket wheel 3 and the first sprocket wheel 1 have the third round fixed orifice 32 of mutual Corresponding matching, third round fastener stretches in third round fixed orifice 32, is fixed on by the 3rd sprocket wheel 3 on first sprocket wheel 1, and the 3rd sprocket wheel 3 blank is casting.
Second sprocket wheel 2 has second to take turns through hole 21, second sprocket wheel 2 is taken turns through hole 21 by second and is set on main shaft 4,3rd sprocket wheel 3 has third round through hole 31, second sprocket wheel 2 has protuberance 25, third round through hole 31 cross section is greater than protuberance 25 cross section, protuberance 25 through third round through hole 31 and the first sprocket wheel 1 against, the 3rd sprocket wheel 3 is between the first sprocket wheel 1 and the second wheel sprocket 2.
Second to take turns one end that through hole 21 contacts with the first sprocket wheel 1 horn-like for extending out.
Second sprocket wheel 2 and the first sprocket wheel 1 are fixed by articulation bolt 26 and bolt 27, the articulation hole 23 of the second sprocket wheel 2 and be located at protuberance 25 for the unthreaded hole 22 of hold-down bolt 27, first sprocket wheel 1 has articulation hole 23 and the unthreaded hole 22 of coupling mutually, articulation hole 23 and unthreaded hole 22 are circumferentially evenly being interspersed.
Second sprocket wheel 2 has Long Circle through hole 24, and Long Circle through hole 24 position is corresponding with third round fixed orifice 32, and Long Circle through hole 24 cross section is greater than third round fastener cross section.
During assembling transmission device, carry out according to the following steps:
A. the first sprocket wheel 1 blank is carried out to the processing of gear hobbing process, both ends of the surface prtreatment and unthreaded hole 22, the first sprocket wheel 1 is set on main shaft 4 by first round through hole 11, first round through hole 11 edge and main shaft 4 are welded and fixed.
B. fine limit work is carried out to the contact surface that the first sprocket wheel 1 contacts with the second sprocket wheel 2.
C. the 3rd sprocket wheel 3 is set on the first sprocket wheel 1, the second sprocket wheel 2 protuberance 25 is set on main shaft 4 through third round through hole 31, and against the first sprocket wheel 1.
D. align reaming processing is carried out to the articulation hole 23 on the first sprocket wheel 1, second sprocket wheel 2, articulation bolt 26 and bolt 27 are installed, the second sprocket wheel 2 is installed on the first sprocket wheel 1.
E. by the Long Circle through hole 24 on described second sprocket wheel 2, by third round fastener through third round fixed orifice 32, the 3rd sprocket wheel 3 is installed on the first sprocket wheel 1.
Embodiment two
As shown in Figure 8, be with the difference of embodiment one:
First sprocket wheel 1, second sprocket wheel 2 described in embodiment one, the 3rd sprocket wheel 3 are installed on one end of main shaft 4, and the other end of main shaft 5 is also provided with the 4th sprocket wheel 5, the 5th sprocket wheel 6.
The other end of main shaft 4 has boss, and for positioning the 4th sprocket wheel 5, the 4th sprocket wheel 5 has fourth round through hole, and the 4th sprocket wheel 5 to be set on main shaft 4 by fourth round through hole and against boss, is welded and fixed the edge at fourth round through hole two ends and main shaft 4.
5th sprocket wheel 6 has the 5th to take turns through hole, and the 5th sprocket wheel 6 is taken turns through hole by the 5th and is set in main shaft.
5th sprocket wheel 6 and the 4th sprocket wheel 5 have the 5th of mutual Corresponding matching the to take turns fixed orifice, and the 5th takes turns fastener stretches into the 5th and takes turns in fixed orifice, and be fixed on by the 5th sprocket wheel 6 on the 4th sprocket wheel 5, the 5th sprocket wheel 6 blank is casting.
During assembling transmission device, complete on the installation steps basis described in embodiment one, also comprise the other end the 4th sprocket wheel 5, the 5th sprocket wheel 6 being installed on main shaft, be specially following steps:
A. to the prtreatment that the 4th sprocket wheel 5 blank carries out gear hobbing process, fixed orifice is taken turns in both ends of the surface prtreatment and the 5th, the 4th sprocket wheel 5 is set on main shaft 4 by fourth round through hole, fourth round through hole edge and main shaft 4 are welded and fixed.
B. the 5th sprocket wheel 6 being taken turns through hole by the 5th is set on main shaft 4, and the 5th takes turns fastener takes turns fixed orifice through the 5th, is installed on the 4th sprocket wheel 5 by the 5th sprocket wheel 6.
Each technical characteristic of the above embodiment can combine arbitrarily, for making description succinct, the all possible combination of each technical characteristic in above-described embodiment is not all described, but, as long as the combination of these technical characteristics does not exist contradiction, be all considered to be the scope that this specification sheets is recorded.
The above embodiment only have expressed the specific embodiment of the present invention, and it describes comparatively concrete and detailed, but therefore can not be interpreted as the restriction to the scope of the claims of the present invention.It should be pointed out that for the person of ordinary skill of the art, without departing from the inventive concept of the premise, can also make some distortion and improvement, these all belong to protection scope of the present invention.
Claims (10)
1. a transmission device, is characterized in that, comprising:
Main shaft;
First sprocket wheel, the first sprocket wheel has first round through hole, and the first sprocket wheel is set on main shaft by first round through hole, and first round through hole edge and main shaft are welded and fixed;
Second sprocket wheel, second sprocket wheel has second to take turns through hole, and the second sprocket wheel is taken turns through hole by second and is set on main shaft, and the second sprocket wheel and the first sprocket wheel are provided with second of mutual Corresponding matching and take turns fixed orifice, second takes turns fastener stretches into second and takes turns in fixed orifice, is fixed on the first sprocket wheel by the second sprocket wheel.
2. transmission device according to claim 1, it is characterized in that, described second takes turns fastener comprises articulation bolt and bolt, and described second takes turns fixed orifice comprises articulation hole and unthreaded hole, described articulation hole coordinates with described articulation bolt articulation, and described unthreaded hole mates with described bolt.
3. transmission device according to claim 1, is characterized in that, described second to take turns one end that through hole contacts with described first sprocket wheel horn-like for extending out.
4. the arbitrary transmission device according to claims 1 to 3, it is characterized in that, also comprise the 3rd sprocket wheel, described 3rd sprocket wheel and described first sprocket wheel there is the third round fixed orifice of mutual Corresponding matching, third round fastener stretches in described third round fixed orifice, is fixed on described first sprocket wheel by described 3rd sprocket wheel.
5. transmission device according to claim 4, it is characterized in that, described 3rd sprocket wheel has third round through hole, described second sprocket wheel is provided with protuberance, described third round through hole cross section is greater than described protuberance cross section, described protuberance through described third round through hole and described first sprocket wheel against, described protuberance has described second to take turns fixed orifice, described second takes turns fastener takes turns fixed orifice and described third round through hole through described second, is fixed on described first sprocket wheel by described second sprocket wheel.
6. transmission device according to claim 5, is characterized in that, described second sprocket wheel has Long Circle through hole, and described Long Circle lead to the hole site is corresponding with described third round fixed orifice, and described Long Circle through hole cross section is greater than described third round fastener cross section.
7. a transmission device assembly method, is characterized in that, comprising:
First sprocket wheel blank is carried out to the processing of gear hobbing process, both ends of the surface prtreatment and unthreaded hole, the first sprocket wheel is set on main shaft by first round through hole, first round through hole edge and main shaft are welded and fixed;
Carry out fine limit work to the contact surface that the first sprocket wheel contacts with the second sprocket wheel, installation second is taken turns fastener and is taken turns in fixed orifice in second, is fixed on the first sprocket wheel by the second sprocket wheel.
8. transmission device assembly method according to claim 7, is characterized in that, also comprise:
Align reaming processing is carried out to the articulation hole on described first sprocket wheel, described second sprocket wheel, described articulation bolt and described bolt are installed, described second sprocket wheel is installed on described first sprocket wheel.
9. transmission device assembly method according to claim 8, is characterized in that, also comprise:
Before align reaming processing is carried out to described first sprocket wheel and described second sprocket wheel, the 3rd sprocket wheel is set on described first sprocket wheel, described protuberance is set on described main shaft through described third round through hole, and against described first sprocket wheel.
10. transmission device assembly method according to claim 9, is characterized in that, also comprise:
After installing described second sprocket wheel, by described Long Circle through hole, described third round fastener is used to be mounted on described first sprocket wheel by described 3rd sprocket wheel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410698769.5A CN104401863B (en) | 2014-11-26 | 2014-11-26 | Escalator transmission mechanism and assembly method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410698769.5A CN104401863B (en) | 2014-11-26 | 2014-11-26 | Escalator transmission mechanism and assembly method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104401863A true CN104401863A (en) | 2015-03-11 |
| CN104401863B CN104401863B (en) | 2017-01-18 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410698769.5A Active CN104401863B (en) | 2014-11-26 | 2014-11-26 | Escalator transmission mechanism and assembly method |
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| CN (1) | CN104401863B (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19725068A1 (en) * | 1997-06-12 | 1998-12-17 | O & K Rolltreppen Gmbh | Escalator or escalator drive |
| CN201125118Y (en) * | 2007-11-05 | 2008-10-01 | 浙江西子重工机械有限公司 | Main driving device of escalator |
| CN101450765A (en) * | 2008-11-03 | 2009-06-10 | 苏州市申龙电梯有限公司 | Removable escalator transmission device |
| CN101934967A (en) * | 2010-09-14 | 2011-01-05 | 苏州新达电扶梯部件有限公司 | Main transmission shaft of escalator |
| CN201961945U (en) * | 2010-12-23 | 2011-09-07 | 吴江全胜机电有限公司 | Escalator driving device |
| CN204624930U (en) * | 2014-11-26 | 2015-09-09 | 日立电梯（广州）自动扶梯有限公司 | Staircase transmission device |
-
2014
- 2014-11-26 CN CN201410698769.5A patent/CN104401863B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19725068A1 (en) * | 1997-06-12 | 1998-12-17 | O & K Rolltreppen Gmbh | Escalator or escalator drive |
| CN201125118Y (en) * | 2007-11-05 | 2008-10-01 | 浙江西子重工机械有限公司 | Main driving device of escalator |
| CN101450765A (en) * | 2008-11-03 | 2009-06-10 | 苏州市申龙电梯有限公司 | Removable escalator transmission device |
| CN101934967A (en) * | 2010-09-14 | 2011-01-05 | 苏州新达电扶梯部件有限公司 | Main transmission shaft of escalator |
| CN201961945U (en) * | 2010-12-23 | 2011-09-07 | 吴江全胜机电有限公司 | Escalator driving device |
| CN204624930U (en) * | 2014-11-26 | 2015-09-09 | 日立电梯（广州）自动扶梯有限公司 | Staircase transmission device |
Non-Patent Citations (1)
| Title |
|---|
| 刘义: "自动扶梯链传动仿真分析", 《起重运输机械》 * |
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|---|---|
| CN104401863B (en) | 2017-01-18 |
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