CN110901602A - Pin-rack transmission telescopic two-stage telescopic supporting leg system - Google Patents
Pin-rack transmission telescopic two-stage telescopic supporting leg system Download PDFInfo
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- CN110901602A CN110901602A CN201911255546.0A CN201911255546A CN110901602A CN 110901602 A CN110901602 A CN 110901602A CN 201911255546 A CN201911255546 A CN 201911255546A CN 110901602 A CN110901602 A CN 110901602A
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- leg
- stage telescopic
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- pin
- rack
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60S—SERVICING, CLEANING, REPAIRING, SUPPORTING, LIFTING, OR MANOEUVRING OF VEHICLES, NOT OTHERWISE PROVIDED FOR
- B60S9/00—Ground-engaging vehicle fittings for supporting, lifting, or manoeuvring the vehicle, wholly or in part, e.g. built-in jacks
- B60S9/02—Ground-engaging vehicle fittings for supporting, lifting, or manoeuvring the vehicle, wholly or in part, e.g. built-in jacks for only lifting or supporting
- B60S9/10—Ground-engaging vehicle fittings for supporting, lifting, or manoeuvring the vehicle, wholly or in part, e.g. built-in jacks for only lifting or supporting by fluid pressure
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Abstract
The invention discloses a pin and rack transmission telescopic two-stage telescopic leg system, which belongs to the technical field of two-stage telescopic leg systems of concrete pump trucks and comprises a first-stage telescopic leg, a second-stage telescopic leg, a vertical oil cylinder, a fixed leg box and a two-stage electric telescopic mechanism, wherein the first-stage telescopic leg is horizontally arranged in the fixed leg box, the first-stage telescopic leg is in sliding fit with the fixed leg box, the second-stage telescopic leg is horizontally arranged in the first-stage telescopic leg, the second-stage telescopic leg is in sliding fit with the first-stage telescopic leg, and the two-stage electric telescopic mechanism comprises a first pin rack, a second pin rack and an electric driving assembly. The pin and rack transmission is adopted, so that the sagging amount of the first-stage telescopic supporting leg and the second-stage telescopic supporting leg when the first-stage telescopic supporting leg and the second-stage telescopic supporting leg extend out can be effectively eliminated, the pin and rack transmission is stable and reliable compared with the telescopic operation of the oil cylinder, the transmission efficiency is high, and the hydraulic motor device is simple and has low hydraulic failure rate compared with a hydraulic system of a two-stage oil cylinder.
Description
Technical Field
The invention relates to the technical field of a two-stage telescopic leg system of a concrete pump truck, in particular to a pin-rack transmission telescopic two-stage telescopic leg system.
Background
Concrete pump trucks usually have telescopic legs, which are formed by two or more stages of legs that are nested together. The first-stage supporting leg is sleeved outside the second-stage supporting leg, the second-stage supporting leg is sleeved outside the third-stage supporting leg, and the rest is done in the same way. When the concrete pump truck works, the second-stage supporting leg extends out of the first-stage supporting leg under the action of the horizontal driving oil cylinder, and the third-stage supporting leg extends out of the second-stage supporting leg, so that the telescopic supporting leg extends to a certain effective length and acts on the ground through the vertical oil cylinder, and the stability of the concrete pump truck during working is ensured. The hydraulic pressure of the double-stage oil cylinder mode of the telescopic supporting leg of the traditional concrete pump truck is complex, the failure rate is high, the horizontal telescopic stability is poor, and the transmission efficiency is low.
Disclosure of Invention
The invention aims to provide a pin and rack transmission telescopic two-stage telescopic supporting leg system to solve the technical problems of poor horizontal telescopic stability and low transmission efficiency of a concrete pump truck telescopic supporting leg in the prior art.
The invention provides a pin and rack transmission telescopic two-stage telescopic leg system, which comprises a first-stage telescopic leg, a second-stage telescopic leg, a vertical oil cylinder, a fixed leg box and a two-stage electric telescopic mechanism, the vertical oil cylinder is vertically arranged at the bottom end of the left side of the second-stage telescopic supporting leg, the first-stage telescopic supporting leg is horizontally arranged in the fixed supporting leg box, the first stage telescopic supporting leg is in sliding fit with the fixed supporting leg box, the second stage telescopic supporting leg is horizontally arranged in the first stage telescopic supporting leg, the second-stage telescopic supporting leg is in sliding fit with the first-stage telescopic supporting leg, the two-stage electric telescopic mechanism comprises a first pin rack, a second pin rack and an electric driving component, the electric driving assembly is used for driving the first pin rack and the second pin rack to move simultaneously, the first pin rack is arranged on the second-stage telescopic supporting leg, and the second pin rack is arranged on the fixed supporting leg box.
Further, the electric drive assembly comprises a hydraulic motor, a first gear set and a second gear set, the first gear set and the second gear set are both installed in the first-stage telescopic supporting leg, the output end of the hydraulic motor is fixedly connected with the second gear set, the hydraulic motor is installed in the first-stage telescopic supporting leg, the first pin rack is arranged below the first gear set, the first gear set is meshed with the first pin rack, the second pin rack is arranged above the second gear set, and the second gear set is meshed with the second pin rack.
Furthermore, the electric driving assembly further comprises a tensioning gear installed in the first-stage telescopic supporting leg, and the first gear set, the second gear set and the tensioning gear are in transmission connection through a chain.
Compared with the prior art, the invention has the beneficial effects that:
the invention has the advantages that the pin-rack transmission can effectively eliminate the drooping amount of the first-stage telescopic supporting leg and the second-stage telescopic supporting leg when the first-stage telescopic supporting leg and the second-stage telescopic supporting leg extend out, the pin-rack transmission is stable and reliable compared with the oil cylinder extension, the transmission efficiency is high, and the hydraulic motor device is simpler than a two-stage oil cylinder hydraulic system and has low hydraulic failure rate; the technical problems that in the prior art, the horizontal telescopic stability of the telescopic support leg of the concrete pump truck is poor and the transmission efficiency is low are solved.
The two-stage electric telescopic mechanism is arranged, the hydraulic motor can drive the second gear set to rotate when being started, the second annual gear set can drive the second pin rack meshed with the second annual gear set to move, the first-stage telescopic supporting leg can stretch out and draw back from the fixed supporting leg box due to the fact that the second pin rack is fixedly connected with the fixed supporting leg box, meanwhile, the second gear set can drive the first gear set to rotate through the chain, the first gear set can drive the first pin rack meshed with the first gear set to move horizontally, the first pin rack can drive the second-stage telescopic supporting leg to move, and the second-stage telescopic supporting leg extends out of the first-stage telescopic supporting leg, so that simultaneous stretching of the first-stage telescopic supporting leg and the second-stage telescopic supporting leg is achieved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.
FIG. 1 is a cross-sectional view of the present invention;
FIG. 2 is a top cross-sectional view of the present invention;
FIG. 3 is a schematic diagram of the present invention;
reference numerals:
the two-stage telescopic landing leg comprises a second-stage telescopic landing leg 1, a first-stage telescopic landing leg 2, a fixed landing leg box 3, a vertical oil cylinder 4, a two-stage electric telescopic mechanism 5, a first pin rack 6, a second pin rack 7, an electric driving assembly 8, a hydraulic motor 81, a first gear set 82, a second gear set 83, a tensioning gear 84 and a chain 9.
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are some, but not all embodiments of the present invention.
The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations. Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention.
All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Referring to fig. 1 to 3, an embodiment of the present invention provides a two-stage telescopic leg system with pin and rack transmission and extension, including a first-stage telescopic leg 2, a second-stage telescopic leg 1, a vertical cylinder 4, a fixed leg box 3, and a two-stage electric telescopic mechanism 5, where the vertical cylinder 4 is vertically disposed at the bottom end of the left side of the second-stage telescopic leg 1, the first-stage telescopic leg 2 is horizontally disposed in the fixed leg box 3, the first-stage telescopic leg 2 is in sliding fit with the fixed leg box 3, the second-stage telescopic leg 1 is horizontally disposed in the first-stage telescopic leg 2, the second-stage telescopic leg 1 is in sliding fit with the first-stage telescopic leg 2, the two-stage electric telescopic mechanism 5 includes a first pin and rack 6, a second pin and rack 7, and an electric driving assembly 8, the electric driving assembly 8 is configured to drive the first pin and rack 6 and the second pin and rack 7 to move simultaneously, the first pin rack 6 is arranged on the second-stage telescopic supporting leg 1, and the second pin rack 7 is arranged on the fixed supporting leg box 3; the telescopic mechanism has the advantages that the pin-rack transmission telescopic mechanism can effectively eliminate the sagging amount of the first-stage telescopic supporting leg 2 and the second-stage telescopic supporting leg 1 when the first-stage telescopic supporting leg and the second-stage telescopic supporting leg extend out, the pin-rack transmission contrast oil cylinder is stable and reliable in telescopic and high in transmission efficiency, a set of hydraulic motor 81 device is simple compared with a two-stage oil cylinder hydraulic system, the hydraulic failure rate is low, the first gear set 82 can drive the first pin rack 6 to move through the two-stage electric telescopic mechanism 5, the second gear set 83 can drive the second pin rack 7 to move, the first-stage telescopic supporting leg 2 and the second-stage telescopic supporting leg 1 can be simultaneously telescopic, the pin-rack transmission contrast oil cylinder is stable and reliable in telescopic and high in transmission efficiency.
Specifically, the electric driving assembly 8 includes a hydraulic motor 81, a first gear group 82 and a second gear group 83, the first gear group 82 and the second gear group 83 are both installed in the first-stage telescopic leg 2, an output end of the hydraulic motor 81 is fixedly connected with the second gear group 83, the hydraulic motor 81 is installed in the first-stage telescopic leg 2, the first pin rack 6 is arranged below the first gear group 82, the first gear group 82 is meshed with the first pin rack 6, the second pin rack 7 is arranged above the second gear group 83, and the second gear group 83 is meshed with the second pin rack 7; the hydraulic motor 81 is started to work and can drive the second gear set 83 to rotate, the second annual gear set can drive the second pin rack 7 meshed with the second annual gear set to move, the second pin rack 7 is fixedly connected with the fixed supporting leg box 3, so that the first-stage telescopic supporting leg 2 can be stretched out and drawn back from the fixed supporting leg box 3, meanwhile, the second gear set 83 can drive the first gear set 82 to rotate through the chain 9, the first gear set 82 can drive the first pin rack 6 meshed with the first gear set to horizontally move, the first pin rack 6 can drive the second-stage telescopic supporting leg 1 to move, the second-stage telescopic supporting leg 1 extends out of the first-stage telescopic supporting leg 2, and the simultaneous stretching of the first-stage telescopic supporting leg 2 and the second-stage telescopic supporting leg 1 is realized; first rack and pinion 6 is in the below of first gear train 82, when the focus of the flexible landing leg of second level 1 stretches out first order flexible landing leg 2, because of the high clearance of the flexible landing leg 2 inner chamber of the 1 appearance height of the flexible landing leg of second level and first order, the flexible landing leg of second level 1 can produce flagging phenomenon, but first rack and pinion 6 has limited the flagging volume of the flexible landing leg of second level 1 with the less clearance of first gear train 82, second rack and pinion 7 is in the top of second gear train 83, when the flexible landing leg of second level 1 stretches out fixed leg case 3 with the focus of the flexible landing leg of first level 2, because of the high clearance of the flexible landing leg 2 appearance height of first order and fixed leg case 3 inner chamber height clearance, the flexible landing leg of second level 1 is flagging simultaneously with the flexible landing leg of first order 2, the flagging volume of the flexible landing leg 2 has been limited with the less clearance of second.
Specifically, the electric driving assembly 8 further comprises a tension gear 84 installed in the first-stage telescopic leg 2, and the first gear set 82, the second gear set 83 and the tension gear 84 are in transmission connection through a chain 9; the second gear set 83 can drive the first gear set 82 to rotate through the chain 9, so that the first gear set 82 can drive the first pin rack 6 meshed with the first gear set to horizontally move, the chain 9 has the advantage of high rigidity, the chain 9 is convenient to mount and adjust the length of the chain 9, and the tension of the chain 9 can be adjusted by the tension gear 84.
The working principle of the invention is as follows: when the invention works, the first-stage telescopic supporting leg 2 and the second-stage telescopic supporting leg 1 can be extended to a required length, the vertical oil cylinder 4 can be extended and supported on the ground to support the concrete pump truck support connected with the fixed supporting leg 3, the hydraulic motor 81 can drive the second gear set 83 to rotate when being started, the second annual gear set can drive the second pin rack 7 meshed with the second annual gear set to move, the first-stage telescopic supporting leg 2 can be extended and retracted from the fixed supporting leg 3 because the second pin rack 7 is fixedly connected with the fixed supporting leg 3, meanwhile, the second gear set 83 can drive the first gear set 82 to rotate through the chain 9, the first gear set 82 can drive the first pin rack 6 meshed with the first gear set 82 to move horizontally, so that the first pin rack 6 can drive the second-stage telescopic supporting leg 1 to move, the two-stage telescopic landing leg has the advantages that the pin and rack transmission can effectively eliminate the sagging amount of the first-stage telescopic landing leg 2 and the second-stage telescopic landing leg 1 when the first-stage telescopic landing leg 2 and the second-stage telescopic landing leg 1 extend out, the pin and rack transmission is stable and reliable compared with the oil cylinder extension, the transmission efficiency is high, and the hydraulic motor 81 device is simple compared with a two-stage oil cylinder hydraulic system and has low hydraulic failure rate.
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; while the invention has been described in detail and with reference to the foregoing embodiments, it will 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; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.
Claims (3)
1. A two-stage telescopic leg system with pin and rack transmission extension and retraction is characterized by comprising a first-stage telescopic leg (2), a second-stage telescopic leg (1), a vertical oil cylinder (4), a fixed leg box (3) and a two-stage electric telescopic mechanism (5), wherein the vertical oil cylinder (4) is vertically arranged at the bottom end of the left side of the second-stage telescopic leg (1), the first-stage telescopic leg (2) is horizontally arranged in the fixed leg box (3), the first-stage telescopic leg (2) is in sliding fit with the fixed leg box (3), the second-stage telescopic leg (1) is horizontally arranged in the first-stage telescopic leg (2), the second-stage telescopic leg (1) is in sliding fit with the first-stage telescopic leg (2), and the two-stage electric telescopic mechanism (5) comprises a first pin and rack (6), a second pin and rack (7) and an electric driving component (8), the electric driving assembly (8) is used for driving the first pin rack (6) and the second pin rack (7) to move simultaneously, the first pin rack (6) is arranged on the second-stage telescopic supporting leg (1), and the second pin rack (7) is arranged on the fixed supporting leg box (3).
2. The pin rack drive telescoping dual stage telescoping leg system of claim 1, the electric driving component (8) comprises a hydraulic motor (81), a first gear set (82) and a second gear set (83), the first gear set (82) and the second gear set (83) are both arranged in the first-stage telescopic supporting leg (2), the output end of the hydraulic motor (81) is fixedly connected with the second gear set (83), the hydraulic motor (81) is arranged in the first-stage telescopic supporting leg (2), the first pin rack (6) is arranged below the first gear set (82), the first gear set (82) is meshed with the first pin rack (6), the second pin rack (7) is arranged above the second gear set (83), and the second gear set (83) is meshed with the second pin rack (7).
3. The pin-rack drive telescopic dual-stage telescopic leg system according to claim 2, wherein the electric driving assembly (8) further comprises a tension gear (84) installed in the first stage telescopic leg (2), and the first gear set (82), the second gear set (83) and the tension gear (84) are in transmission connection through a chain (9).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911255546.0A CN110901602A (en) | 2019-12-10 | 2019-12-10 | Pin-rack transmission telescopic two-stage telescopic supporting leg system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911255546.0A CN110901602A (en) | 2019-12-10 | 2019-12-10 | Pin-rack transmission telescopic two-stage telescopic supporting leg system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110901602A true CN110901602A (en) | 2020-03-24 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911255546.0A Pending CN110901602A (en) | 2019-12-10 | 2019-12-10 | Pin-rack transmission telescopic two-stage telescopic supporting leg system |
Country Status (1)
| Country | Link |
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| CN (1) | CN110901602A (en) |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2487775A1 (en) * | 1980-07-30 | 1982-02-05 | Brissonneau & Lotz | Retractable leg mechanism for offshore drilling platform - use rack and pinion drive with additional safety pinions and braking devices |
| CN202966267U (en) * | 2012-11-13 | 2013-06-05 | 三一汽车制造有限公司 | Landing leg and engineering machinery with same |
| CN103395410A (en) * | 2013-08-07 | 2013-11-20 | 中联重科股份有限公司 | Stretchable supporting leg and concrete pump truck with stretchable supporting leg |
| CN103407433A (en) * | 2013-07-23 | 2013-11-27 | 北汽福田汽车股份有限公司 | Mounting structure for multi-stage retractable legs and engineering machinery |
| CN203391749U (en) * | 2013-07-31 | 2014-01-15 | 三一汽车制造有限公司 | Retractable support and engineering machine |
| CN103588125A (en) * | 2013-11-19 | 2014-02-19 | 山推楚天工程机械有限公司 | Gear rack landing leg telescopic device |
| CN108298445A (en) * | 2017-12-12 | 2018-07-20 | 湖南百特随车起重机有限公司 | A kind of two-stage stretching formula leg system |
| JP2018188907A (en) * | 2017-05-10 | 2018-11-29 | アルインコ株式会社 | Telescopic lock device in telescopic leg device |
| CN209398660U (en) * | 2018-11-23 | 2019-09-17 | 江苏宏昌天马物流装备有限公司 | A kind of two-stage stretching supporting leg |
-
2019
- 2019-12-10 CN CN201911255546.0A patent/CN110901602A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2487775A1 (en) * | 1980-07-30 | 1982-02-05 | Brissonneau & Lotz | Retractable leg mechanism for offshore drilling platform - use rack and pinion drive with additional safety pinions and braking devices |
| CN202966267U (en) * | 2012-11-13 | 2013-06-05 | 三一汽车制造有限公司 | Landing leg and engineering machinery with same |
| CN103407433A (en) * | 2013-07-23 | 2013-11-27 | 北汽福田汽车股份有限公司 | Mounting structure for multi-stage retractable legs and engineering machinery |
| CN203391749U (en) * | 2013-07-31 | 2014-01-15 | 三一汽车制造有限公司 | Retractable support and engineering machine |
| CN103395410A (en) * | 2013-08-07 | 2013-11-20 | 中联重科股份有限公司 | Stretchable supporting leg and concrete pump truck with stretchable supporting leg |
| CN103588125A (en) * | 2013-11-19 | 2014-02-19 | 山推楚天工程机械有限公司 | Gear rack landing leg telescopic device |
| JP2018188907A (en) * | 2017-05-10 | 2018-11-29 | アルインコ株式会社 | Telescopic lock device in telescopic leg device |
| CN108298445A (en) * | 2017-12-12 | 2018-07-20 | 湖南百特随车起重机有限公司 | A kind of two-stage stretching formula leg system |
| CN209398660U (en) * | 2018-11-23 | 2019-09-17 | 江苏宏昌天马物流装备有限公司 | A kind of two-stage stretching supporting leg |
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Application publication date: 20200324 |