CN213981914U - Gearbox structure for engineering machinery - Google Patents
Gearbox structure for engineering machinery Download PDFInfo
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- CN213981914U CN213981914U CN202023204256.4U CN202023204256U CN213981914U CN 213981914 U CN213981914 U CN 213981914U CN 202023204256 U CN202023204256 U CN 202023204256U CN 213981914 U CN213981914 U CN 213981914U
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Abstract
The utility model provides a gearbox structure for engineering machine tool, the power distribution box comprises a box body, hydraulic torque converter and planetary gear speed change mechanism, hydraulic torque converter transmission is connected with second grade turbine output gear and one-level turbine output gear, second grade turbine output gear transmission is connected with constant mesh input shaft, constant mesh input shaft is connected with planetary gear speed change mechanism input, be connected with the toper urceolus on the constant mesh input shaft, one-level turbine output gear transmission is connected with the heavy load input shaft, sliding connection has the sliding sleeve that can follow heavy load input shaft axial motion on the heavy load input shaft, install on the sliding sleeve can with toper urceolus matched with toper inner tube, be connected with the permanent magnet on the toper inner tube, be equipped with the electromagnet on the box, the box still is equipped with the speed sensor who is used for detecting constant. The electromagnet is used for driving the conical outer cylinder to be in contact with and separated from the conical inner cylinder, so that the reliability is improved, the control flexibility is improved, meanwhile, the working state of the conical outer cylinder can be monitored, and the working efficiency is improved.
Description
Technical Field
The utility model belongs to the technical field of the engineering machine tool technique and specifically relates to a gearbox structure for engineering machine tool is related to.
Background
Current gearbox structure for engineering machine tool, including box, torque converter and planetary gear speed change mechanism, torque converter transmission is connected with second grade turbine output gear and one-level turbine output gear, second grade turbine output gear transmission is connected with the constant mesh input shaft, the constant mesh input shaft is connected with planetary gear speed change mechanism input, one-level turbine output gear transmission is connected with the heavy load input shaft, be equipped with freewheel clutch between constant mesh input shaft and the heavy load input shaft, make one-level and second grade turbine output power simultaneously through freewheel clutch when the load increases the grow, when the load becomes, make the idle running of one-level turbine through freewheel clutch, provide power by the second grade turbine alone, realize energy-conserving purpose.
However, the control of current overrunning clutches is mechanical, such as isolating ring overrunning clutches, pin-lift type overrunning clutches or leaf spring overrunning clutches, which have the following disadvantages: 1. after long-time use, mechanical parts for controlling the opening and closing of the overrunning clutch are easy to damage, such as a spring and a mechanical part stressed in the middle, so that the function of the overrunning clutch is lost, and the reliability is poor; 2. real-time control is difficult to realize, and the responsiveness and the flexibility are poor.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to overcome above-mentioned conventional art's weak point, provide a gearbox structure for engineering machine tool, the spring that destroys most easily in the cancellation clutch and the mechanical parts of middle atress improve the reliability.
The purpose of the utility model is achieved through the following technical measures: the utility model provides a gearbox structure for engineering machine tool, includes box, torque converter and planetary gear speed change mechanism, the torque converter transmission is connected with second grade turbine output gear and one-level turbine output gear, second grade turbine output gear transmission is connected with constant mesh input shaft, constant mesh input shaft is connected with planetary gear speed change mechanism input, be connected with the toper urceolus on the constant mesh input shaft, one-level turbine output gear transmission is connected with the heavy load input shaft, sliding connection has the sliding sleeve that can follow heavy load input shaft axial motion on the heavy load input shaft, install on the sliding sleeve can with toper urceolus matched with toper inner tube, be connected with the permanent magnet on the toper inner tube, be equipped with the electromagnet on the box, the box still is equipped with the speed sensor who is used for detecting the constant mesh input shaft rotational speed. When the rotating speed of the normally meshed input shaft is lower than the set rotating speed, the electromagnet is started, at the moment, the polarity of the electromagnet is the same as that of the permanent magnet, the permanent magnet pushes the sliding sleeve to move forward, the outer side of the conical inner cylinder is close to the inner side of the conical outer cylinder, the outer side of the conical inner cylinder is in contact with the inner side of the conical outer cylinder, and the power of the heavy-load input shaft is transmitted to the normally meshed input shaft by utilizing the friction force between the conical inner cylinder and the conical outer cylinder. When the rotating speed of the input shaft is higher than the set rotating speed and the rotating speed reduction acceleration is smaller than the set acceleration, the electromagnet is started, at the moment, the polarity of the electromagnet is opposite to that of the permanent magnet, the permanent magnet pushes the sliding sleeve to retreat, the outer side of the conical inner cylinder is far away from the inner side of the conical outer cylinder, the outer side of the conical inner cylinder is separated from the inner side of the conical outer cylinder in contact, and the power of the heavy-load input shaft cannot be transmitted to the normally meshed input shaft.
The heavy load input shaft side is seted up along the internal spline groove that interior heavy load input shaft axial set up, the sliding sleeve inboard is seted up with the corresponding external spline groove in internal spline groove, be connected with on the heavy load input shaft and be used for the spacing stop device of sliding sleeve.
The limiting device comprises a limiting nut, and the limiting nut is in threaded connection with the end part of the heavy-load input shaft. Stop nut will prevent that toper inner tube position from too leaning on before, and the rear end of internally splined groove will prevent that toper inner tube position from too leaning on the back, prevents that the toper inner tube from colliding with other parts, conveniently installs the sliding sleeve from heavy load input shaft front end simultaneously.
The heavy-load input shaft is of a hollow structure, and the normally-meshed input shaft penetrates through the heavy-load input shaft. The normally meshed input shaft is directly connected with the input end of the planetary gear speed change mechanism, so that transmission parts are reduced, and the power transmission efficiency and reliability are improved.
The bottom of the conical outer barrel is provided with a plurality of heat dissipation holes. When the outer side of the conical inner cylinder is in contact with the inner side of the conical outer cylinder, air on the inner side of the conical outer cylinder can be discharged through the heat dissipation holes, and meanwhile the heat dissipation effect is improved.
The permanent magnet is in a ring shape, and the electromagnet is in a ring shape. The areas of the permanent magnet and the electromagnet are large, so that enough magnetic force can be ensured to drive the conical inner cylinder to move.
And a constant-mesh input gear meshed with the second-stage turbine output gear is installed on the constant-mesh input shaft, and a heavy-load input gear meshed with the first-stage turbine output gear is installed on the heavy-load input shaft.
The hydraulic torque converter comprises a second-stage turbine, a first-stage turbine, a guide wheel and a pump wheel, wherein the second-stage turbine is connected with a second-stage turbine output gear, and the first-stage turbine is connected with a first-stage turbine output gear.
The planetary gear speed change mechanism comprises a sun gear connected with a normally engaged input shaft, a reverse gear planet gear carrier is connected to the normally engaged input shaft in a rotating mode, the reverse gear planet gear carrier is connected with a reverse gear clutch, and a reverse gear planet gear meshed with the sun gear is connected to the reverse gear planet gear carrier in a rotating mode; the constant-meshing input shaft is also rotatably connected with a forward gear planet carrier, the forward gear planet carrier is rotatably connected with a forward gear planet gear meshed with the sun gear, the forward gear planet carrier is connected with a direct gear output gear, and a direct gear clutch is arranged between the direct gear output gear and the constant-meshing input shaft; the planetary gear set comprises a reverse gear planetary gear set, a forward gear planetary gear set and a forward gear planetary gear carrier, wherein the reverse gear planetary gear set is meshed with the reverse gear planetary gear set and the forward gear planetary gear carrier, the forward gear planetary gear set is meshed with the forward gear planetary gear, and the forward gear planetary gear set is connected with a forward gear clutch. The adjustment and speed change of the forward gear and the reverse gear are realized.
The direct gear output gear is in transmission connection with a gearbox output gear. And the power output is realized.
In conclusion, due to the adoption of the technical scheme, the electromagnet is used for driving the conical outer cylinder to be in contact with or separate from the conical inner cylinder, the spring and the middle stress part which are most easily damaged are eliminated, the reliability is improved, the control flexibility and the smoothness are improved, meanwhile, the working state of the conical outer cylinder can be monitored, and the working efficiency is improved.
Drawings
The invention will be further explained with reference to the drawings and the detailed description below:
FIG. 1 is a schematic structural diagram of a transmission structure for construction machinery of the present invention;
FIG. 2 is a schematic structural diagram of a main clutch in the transmission structure for engineering machinery of the present invention;
FIG. 3 is a schematic structural view of section A-A of FIG. 2;
fig. 4 is a schematic diagram of a structure of a main clutch in a transmission structure for an engineering machine according to the present invention.
In the figure: 1-a hydraulic torque converter; 2-a two-stage turbine; 3-a first-stage turbine; 4-a guide wheel; 5-pump impeller; 6-two-stage turbine output gear; 7-first stage turbine output gear; 8-reverse clutch; 9-forward clutch; 10-reverse gear planetary gear train ring gear; 11-forward gear planetary gear train ring gear; 12-forward gear planetary gear; 13-forward gear planet carrier; 14-direct gear output gear; 15-direct gear clutch; 16-a box body; 17-a sun gear; 18-a gearbox output gear; 19-reverse gear planetary gear; 20-reverse gear planet wheel carrier; 21-heavy duty input gear; 22-a rotational speed sensor; 23-constant mesh input gear; 24-a main clutch; 25-constant mesh input shaft; 26-heavy-duty input shaft; 27-heat dissipation holes; 28-internal spline grooves; 29-a conical outer cylinder; 30-a limit nut; 31-a sliding sleeve; 32-a tapered inner barrel; 33-a permanent magnet; 34-an electromagnet; 35-external spline grooves.
Detailed Description
In order to facilitate understanding of the present invention, the following description is made with reference to the embodiments and the accompanying drawings, and the description of the embodiments is not intended to limit the present invention.
In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like indicate orientations or positional relationships that must be specified based on the device or element shown in the drawings, are constructed or operated in a specific orientation, and thus, should not be construed as limiting the present invention.
Furthermore, the terms "first," "second," "third," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicit to a number of indicated technical features. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise. In the description of the present invention, it should be noted that, unless otherwise specified and limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, mechanically or electrically connected, or interconnected between two elements, either directly or indirectly through intervening media, and the specific meaning of the terms may be understood by those skilled in the art according to their specific situation.
As shown in fig. 1, a transmission structure for construction machinery includes a case 16, a torque converter 1, a main clutch 24, and a planetary gear transmission mechanism.
The hydraulic torque converter 1 comprises a second-stage turbine 2, a first-stage turbine 3, a guide wheel 4 and a pump impeller 5, the hydraulic torque converter 1 is in transmission connection with a second-stage turbine output gear 6 and a first-stage turbine output gear 7, specifically, the second-stage turbine 2 is connected with the second-stage turbine output gear 6, the first-stage turbine 3 is connected with the first-stage turbine output gear 7, and the diameter of the second-stage turbine output gear 6 is larger than that of the first-stage turbine output gear 7.
As shown in fig. 2 to 4, the main clutch 24 includes a constant mesh input shaft 25 and a heavy-duty input shaft 26, the constant mesh input shaft 25 being connected to the input of the planetary gear mechanism. The second-stage turbine output gear 6 is in transmission connection with a constant-mesh input shaft 25, and specifically, a constant-mesh input gear 23 meshed with the second-stage turbine output gear 6 is mounted on the constant-mesh input shaft 25; the first-stage turbine output gear 7 is in transmission connection with a heavy-load input shaft 26, and specifically, the heavy-load input shaft 26 is provided with a heavy-load input gear 21 meshed with the first-stage turbine output gear 7. The diameter of constant mesh input gear 23 is smaller than the diameter of heavy duty input gear 21. The torque converter 1 transmits power to the constant mesh input shaft 25 through the second-stage turbine 2, the second-stage turbine output gear 6, and the constant mesh input gear 23, and the torque converter 1 transmits power to the heavy load input shaft 26 through the first-stage turbine 3, the first-stage turbine output gear 7, and the heavy load input gear 21.
Be connected with toper urceolus 29 on the constant mesh input shaft 25, sliding connection has the sliding sleeve 31 that can follow heavy load input shaft 26 axial motion on the heavy load input shaft 26, and the preferred, heavy load input shaft 26 side is seted up along the internal spline groove 28 that internal load input shaft 26 axial set up, sliding sleeve 31 inboard is seted up with the corresponding external spline groove 35 in internal spline groove 28, is connected with on the heavy load input shaft 26 and is used for the spacing stop device of sliding sleeve 31. Specifically, the limiting device comprises a limiting nut 30, and the limiting nut 30 is in threaded connection with the end of the heavy-load input shaft 26. The sliding sleeve 31 is provided with a conical inner cylinder 32 which can be matched with the conical outer cylinder 29, and the bottom of the conical outer cylinder 29 is provided with a plurality of heat dissipation holes 27. The conical inner cylinder 32 is connected with a permanent magnet 33, the box body 16 is provided with an electromagnet 34, preferably, the permanent magnet 33 is in a ring shape, the electromagnet is in a ring shape, the areas of the permanent magnet 33 and the electromagnet 34 are large, and enough magnetic force can be ensured to drive the conical inner cylinder 32 to move. The housing 16 is further provided with a rotation speed sensor 22 for detecting the rotation speed of the constantly engaged input shaft 25, and the rotation speed sensor 22 is known in the art and will not be described in detail herein.
Heavy-duty input shaft 26 is hollow and constantly engages input shaft 25 to extend through heavy-duty input shaft 26. The constant mesh input shaft 25 is directly connected with the input end of the planetary gear speed change mechanism, so that transmission parts are reduced, and the power transmission efficiency and reliability are improved.
First, the rotation speed sensor 22 detects the rotation speed of the constant mesh input shaft 25 or the constant mesh input gear 23.
When the rotating speed of the normally meshed input shaft 25 is lower than the set rotating speed, for example 1000r/min, the electromagnet 34 is started, at this time, the electromagnet 34 and the permanent magnet 33 have the same polarity, the permanent magnet 33 pushes the sliding sleeve 31 to advance, the outer side of the conical inner cylinder 32 is close to the inner side of the conical outer cylinder 29, the outer side of the conical inner cylinder 32 is in contact with the inner side of the conical outer cylinder 29, and the power of the heavy-load input shaft 26 is transmitted to the normally meshed input shaft 25 by using the friction force between the conical inner cylinder 32 and the conical outer cylinder 29. Stop nut 30 will prevent that toper inner tube 32 position from too leaning on before, and the rear end of internally splined groove 28 will prevent that toper inner tube 32 position from too leaning on the back, prevents that toper inner tube 32 from colliding with other parts, conveniently follows heavy load input shaft 26 front end installation sliding sleeve 31 simultaneously. When the outside of the tapered inner cylinder 32 contacts the inside of the tapered outer cylinder 29, the air inside the tapered outer cylinder 29 can be discharged through the heat dissipation holes 27, and the heat dissipation effect is improved.
When the rotating speed of the normally engaged input shaft 25 is higher than 1000r/min, and the rotating speed reduction acceleration is larger than the set acceleration, such as 4r/s2At this time, the outside of the tapered inner cylinder 32 is in contact with the inside of the tapered outer cylinder 29.
When the rotating speed of the normally engaged input shaft 25 is higher than 1000r/min and the rotating speed reduction acceleration is less than 4r/s2When the electromagnet 34 is started, at the moment, the polarity of the electromagnet 34 is opposite to that of the permanent magnet 33, the permanent magnet 33 pushes the sliding sleeve 31 to retreat, so that the outer side of the conical inner cylinder 32 is far away from the inner side of the conical outer cylinder 29, the outer side of the conical inner cylinder 32 is separated from the inner side of the conical outer cylinder 29, and the power of the heavy-load input shaft 26 cannot be transmitted to the normally meshed input shaft 25.
As shown in fig. 1, the planetary gear speed change mechanism comprises a sun gear 17 connected with a normally engaged input shaft 25, a reverse gear planet carrier 20 is connected on the normally engaged input shaft 25 in a rotating manner, the reverse gear planet carrier 20 is connected with a reverse gear clutch 8, and a reverse gear planet gear 19 engaged with the sun gear 17 is connected on the reverse gear planet carrier 20 in a rotating manner; a forward gear planet carrier 13 is also rotatably connected to the constant-meshing input shaft 25, a forward gear planet gear 12 meshed with the sun gear 17 is rotatably connected to the forward gear planet carrier 13, a direct gear output gear 14 is connected to the forward gear planet carrier 13, and a direct gear clutch 15 is arranged between the direct gear output gear 14 and the constant-meshing input shaft 25; the planetary gear set further comprises a reverse gear planetary gear train gear ring 10 engaged with the reverse gear planetary gear 19 and the forward gear planetary gear carrier 13, a forward gear planetary gear train gear ring 11 engaged with the forward gear planetary gear 12, and the forward gear planetary gear train gear ring 11 is connected with a forward gear clutch 9. The direct-gear output gear 14 is in driving connection with a gearbox output gear 18.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention.
Claims (10)
1. The utility model provides a gearbox structure for engineering machine tool, includes box (16), torque converter (1) and planetary gear speed change mechanism, torque converter (1) transmission is connected with second grade turbine output gear (6) and one-level turbine output gear (7), its characterized in that: second grade turbine output gear (6) transmission is connected with constant mesh input shaft (25), constant mesh input shaft (25) are connected with the planetary gear speed change mechanism input, be connected with toper urceolus (29) on constant mesh input shaft (25), one-level turbine output gear (7) transmission is connected with heavily loaded input shaft (26), sliding connection has sliding sleeve (31) that can follow heavily loaded input shaft (26) axial motion on heavily loaded input shaft (26), install on sliding sleeve (31) can with toper urceolus (29) matched with toper inner tube (32), be connected with permanent magnet (33) on toper inner tube (32), be equipped with electromagnet (34) on box (16), box (16) still are equipped with speed sensor (22) that are used for detecting constant mesh input shaft (25) rotational speed.
2. The transmission structure for construction machinery according to claim 1, wherein: heavy load input shaft (26) side is seted up along interior heavy load input shaft (26) axial setting's internal spline groove (28), sliding sleeve (31) inboard is seted up with internal spline groove (28) corresponding external spline groove (35), be connected with on heavy load input shaft (26) and be used for being the spacing stop device of sliding sleeve (31).
3. The transmission structure for construction machinery according to claim 2, wherein: the limiting device comprises a limiting nut (30), and the limiting nut (30) is in threaded connection with the end part of the heavy-load input shaft (26).
4. The transmission structure for construction machinery according to claim 1, wherein: the heavy-load input shaft (26) is of a hollow structure, and the constant-meshing input shaft (25) penetrates through the heavy-load input shaft (26).
5. The transmission structure for construction machinery according to claim 1, wherein: the bottom of the conical outer cylinder (29) is provided with a plurality of heat dissipation holes (27).
6. The transmission structure for construction machinery according to claim 1, wherein: the permanent magnet (33) is in a ring shape, and the electromagnet (34) is in a ring shape.
7. The transmission structure for construction machinery according to any one of claims 1 to 6, wherein: install on constant mesh input shaft (25) with second grade turbine output gear (6) engaged with constant mesh input gear (23), install on heavily loaded input shaft (26) with one-level turbine output gear (7) engaged with heavily loaded input gear (21).
8. The transmission structure for construction machinery according to any one of claims 1 to 6, wherein: the hydraulic torque converter (1) comprises a secondary turbine (2), a primary turbine (3), a guide wheel (4) and a pump wheel (5), the secondary turbine (2) is connected with a secondary turbine output gear (6), and the primary turbine (3) is connected with a primary turbine output gear (7).
9. The transmission structure for construction machinery according to any one of claims 1 to 6, wherein: the planetary gear speed change mechanism comprises a sun gear (17) connected with a normally engaged input shaft (25), a reverse gear planet carrier (20) is connected to the normally engaged input shaft (25) in a rotating mode, a reverse gear clutch (8) is connected to the reverse gear planet carrier (20), and a reverse gear planet gear (19) engaged with the sun gear (17) is connected to the reverse gear planet carrier (20) in a rotating mode;
a forward gear planetary carrier (13) is further rotatably connected to the normally engaged input shaft (25), a forward gear planetary gear (12) engaged with the sun gear (17) is rotatably connected to the forward gear planetary carrier (13), a direct gear output gear (14) is connected to the forward gear planetary carrier (13), and a direct gear clutch (15) is arranged between the direct gear output gear (14) and the normally engaged input shaft (25);
the planetary gear set further comprises a reverse gear planetary gear train gear ring (10) meshed with the reverse gear planetary gear (19) and the forward gear planetary gear carrier (13), and a forward gear planetary gear train gear ring (11) meshed with the forward gear planetary gear (12), wherein the forward gear planetary gear train gear ring (11) is connected with a forward gear clutch (9).
10. The transmission structure for construction machinery according to claim 9, wherein: the direct gear output gear (14) is in transmission connection with a gearbox output gear (18).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023204256.4U CN213981914U (en) | 2020-12-28 | 2020-12-28 | Gearbox structure for engineering machinery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023204256.4U CN213981914U (en) | 2020-12-28 | 2020-12-28 | Gearbox structure for engineering machinery |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213981914U true CN213981914U (en) | 2021-08-17 |
Family
ID=77248354
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202023204256.4U Active CN213981914U (en) | 2020-12-28 | 2020-12-28 | Gearbox structure for engineering machinery |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN213981914U (en) |
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2020
- 2020-12-28 CN CN202023204256.4U patent/CN213981914U/en active Active
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| GR01 | Patent grant | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 266500 No. 75 East Huanghe Road, Huangdao District, Qingdao City, Shandong Province Patentee after: Lovol Heavy Industry Group Co.,Ltd. Address before: 266500 No. 75 East Huanghe Road, Huangdao District, Qingdao City, Shandong Province Patentee before: LOVOL Engineering Machinery Group Co.,Ltd. |
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| CP01 | Change in the name or title of a patent holder |