CN106808221B - linear motion platform for heavy load - Google Patents
linear motion platform for heavy load Download PDFInfo
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- CN106808221B CN106808221B CN201710242810.1A CN201710242810A CN106808221B CN 106808221 B CN106808221 B CN 106808221B CN 201710242810 A CN201710242810 A CN 201710242810A CN 106808221 B CN106808221 B CN 106808221B
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- platform
- actuator
- support
- hydraulic servo
- roller assemblies
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
- B23Q1/00—Members which are comprised in the general build-up of a form of machine, particularly relatively large fixed members
- B23Q1/25—Movable or adjustable work or tool supports
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Bearings For Parts Moving Linearly (AREA)
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Abstract
The invention discloses a motion platform, and belongs to the field of motion platforms. The device comprises a first roller assembly, a second roller assembly, a hydraulic servo actuator and a motion platform. The hydraulic servo actuator is arranged on the ground steel structure in the middle of the motion platform by adopting an actuator hinge seat and is used for driving the platform part to stop at a high speed and start at a high speed at a specified position. According to the invention, rolling friction is adopted to replace a sliding friction mode of a traditional motion platform guide rail, so that the friction resistance of the motion platform can be greatly reduced, and the hydraulic servo actuator is adopted for driving, so that the heavy-load characteristic requirement of the motion platform can be met. In addition, the device has the advantages of compact and simple structure, low energy consumption and high efficiency.
Description
Technical Field
the invention relates to a linear motion platform, in particular to a heavy-load large-displacement linear motion platform capable of sliding back and forth in a reciprocating mode, which is used in a detection device.
Background
in the fields of machining, detection and the like, a linear motion platform of the conventional detection device mainly transfers motion by virtue of a screw rod and a sliding guide rail under the working condition of heavy load and high speed. The screw rod is used for transmitting power, the rolling guide rail is used for bearing and guiding, and the screw rod transmits the power by utilizing the circulating motion of the balls. The lead screw is limited by the manufacturing precision problem of the heavy load and the large displacement lead screw, the lead screw has elastic deformation in the moving process and responds to the hysteresis phenomenon, the processing period of the lead screw applied to the heavy load and the large displacement is long, meanwhile, the sliding guide rail is adopted as the main transmission guide rail to guide the movement, the problem of overlarge resistance inevitably exists, the driving force of the moving platform is relatively increased, the lubrication of the high-speed sliding guide rail of the heavy load is very complex, and the maintenance is very troublesome.
Therefore, it is necessary to develop a linear motion platform suitable for heavy load and large displacement requirements, and the maintenance and use convenience of the linear motion platform is also required.
Disclosure of Invention
Aiming at the defects or improvement requirements of the prior art, the invention provides a large-displacement linear motion platform for heavy load, which adopts rolling friction to replace a sliding friction method of a guide rail of the traditional motion platform and adopts a hydraulic servo actuator for driving.
In order to achieve the above objects, the present invention provides a large displacement linear motion platform for heavy loads, comprising a first roller assembly, a second roller assembly, a hydraulic servo actuator and a platform part,
The first roller assembly comprises a roller, a first support and a second support, the roller is arranged between the first support and the second support, the first support and the second support are mounted on a foundation steel structure, the second roller assembly comprises a roller and a second support, the roller is arranged between the two second supports which are arranged in parallel, the second support is mounted on the foundation steel structure, and the plurality of first roller assemblies and the plurality of second roller assemblies are combined into a main body and a guide rail of the supporting motion platform.
The hydraulic servo actuator comprises a piston rod earring, an actuator cylinder barrel, an actuator hinge seat and a displacement sensor, wherein the piston rod earring is arranged at the front end of a piston rod of the actuator and is used for being connected with the platform hinge seat, the actuator hinge seat is arranged at the front end of the servo actuator cylinder barrel and is used for fixing the servo actuator on a foundation steel structure, and the displacement sensor is arranged at the tail part of the actuator and is used for detecting the displacement of the piston rod of the actuator.
The platform component comprises a platform body, a guide rail pressing plate, a platform hinge seat and a pin shaft. The guide rail pressing plates are arranged on the bases on two sides of the lower surface of the platform body and used for pressing the guide surfaces of the first supporting seat, and the platform hinge seat is arranged in the middle of the lower surface of the platform body and connected with a piston rod earring of the hydraulic servo actuator through a pin shaft. Wear-resisting non-maintaining composite copper plate is all installed on the contact surface that the guide surface that platform body and guide rail clamp plate and first support contacted.
In general, compared with the prior art, the above technical solution contemplated by the present invention can achieve the following beneficial effects:
the transmission guide rail of the linear motion platform is in roller friction, and has very low resistance compared with a sliding guide rail. The actuator of the device is directly connected with the motion platform, and the response of the motion platform has no hysteresis phenomenon, so that the robustness of motion precision control of the motion platform is obviously improved. In addition, the device has simple and compact structure, ingenious design, safety and reliability, and the actuator of the device can realize automatic control and remote monitoring by means of an external hydraulic drive and a computer control system.
Drawings
Fig. 1 is a schematic perspective view of a linear motion platform according to the present invention.
Fig. 2 is a schematic perspective view of a first roller assembly according to an embodiment of the present invention.
Fig. 3 is a schematic perspective view of a second roller assembly according to an embodiment of the present invention.
Fig. 4 is a schematic perspective view of a hydraulic servo actuator according to an embodiment of the present invention.
Fig. 5 is a schematic perspective view of a platform member according to an embodiment of the present invention.
The same reference numbers will be used throughout the drawings to refer to the same or like elements or structures, wherein:
1-first roller assembly 2-second roller assembly 3-Hydraulic Servo actuator
4-platform part 5-first support 6-roller
7-second support 8-piston rod ear ring 9-actuator cylinder
10-actuator hinge base 11-displacement sensor 12-platform body
13-guide rail pressing plate 14-platform hinge seat 15-pin shaft
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention. In addition, the technical features involved in the embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.
The invention discloses a linear motion platform, which comprises a first roller assembly, a second roller assembly, a hydraulic servo actuator and a motion platform. The hydraulic servo actuator is arranged on the ground steel structure in the middle of the motion platform by adopting an actuator hinge seat and is used for driving the platform part to stop at a high speed and start at a high speed at a specified position. In the invention, the heavy load in the heavy-load large-displacement linear motion platform means that the mass of the motion load is more than 40000kg, and the large displacement means the moving distance of more than 4 m.
fig. 1 is a schematic perspective view of a linear motion platform according to the present invention, which includes a first roller assembly 1, a second roller assembly 2, a hydraulic servo actuator 3, and a platform member 4.
Fig. 2 is a schematic perspective view of a first roller assembly according to an embodiment of the present invention, and fig. 3 is a schematic perspective view of a second roller assembly according to an embodiment of the present invention, and as can be seen from the above two views and fig. 1, the first roller assembly 1 and the second roller assembly 2 are both disposed on a foundation steel structure, and a plurality of second roller assemblies 2 and a plurality of first roller assemblies 1 are connected side by side to form a guide rail assembly for supporting a platform member 4 and allowing the platform member 4 to move on the guide rail assembly itself.
the first roller assembly 1 is distributed at two sides below the platform part 4, the first roller assembly 1 comprises a first support 5, a second support 7 and rollers 6, the rollers 6 are arranged between the first support 5 and the second support 7 in parallel, and the first support 5 and the second support 7 are parallel to each other. The second roller assembly 2 is distributed at the center of the lower surface of the platform assembly 4, the second roller assembly 2 comprises two second supports 7 arranged in parallel and rollers 6, and the rollers 6 are arranged between the two second supports 7 in parallel.
as can be further seen from fig. 1, 2 and 3, the hydraulic servo actuator 3 is disposed in the middle of the whole guide rail and fixed on the foundation steel structure, the bottom surface of the platform part 4 is connected with the hydraulic servo actuator 3, and the hydraulic servo actuator 3 is used for driving the platform part 4 to move to a set position. The hydraulic servo actuator 3 is internally driven by hydraulic oil.
In one embodiment of the present invention, the first support 5 and the second support 7 are both long and have the same length, and the top of the first support 5 has a guide surface which is in contact with the bottom of the platform member 4, and the guide surface is smooth and flat, and has a surface roughness Ra of not more than 3.2.
In a further embodiment of the invention, eight second roller assemblies 2 are connected side by side to four first roller assemblies 1 to form a guide rail unit, the four first roller assemblies 1 forming two rows which are symmetrically arranged along the hydraulic servo actuator 3, the eight second roller assemblies 2 forming four rows which are symmetrically arranged along the hydraulic servo actuator 3, the two rows of first roller assemblies 1 being respectively arranged on both sides of the platform part 4, and the four rows of second roller assemblies 2 being respectively arranged two by two at the center of the platform part 4.
fig. 4 is a schematic diagram of a three-dimensional structure of a hydraulic servo actuator in an embodiment of the present invention, where the hydraulic servo actuator 3 includes a piston rod ear ring 8, a piston rod, an actuator cylinder 9, an actuator hinge seat 10, and a displacement sensor 11, where the piston rod is disposed in the actuator cylinder 9, the piston rod ear ring 8 is fixed at the front end of the piston rod and is used for being connected with the platform part 4, the actuator hinge seat 10 is disposed at the front end of the actuator cylinder 9 and is used for fixing the actuator cylinder 9 on a foundation steel structure, and the displacement sensor 11 is disposed at the tail of the actuator cylinder 9 and is used for detecting the displacement of the piston rod, so as to implement displacement detection on the platform. A hydraulic servo actuator 3 is mounted directly centrally below the platform member 4 and adjacent the second roller assembly 2.
Fig. 5 is a schematic perspective view of a platform component according to an embodiment of the present invention, which includes a platform body 12, a rail pressing plate 13, a platform hinge base 14, and a pin 15. The guide rail pressing plates 13 are arranged on two sides of the bottom surface of the platform body 2 and used for being buckled on the guide surface of the first support 5 in a pressing mode, the platform hinge seat 14 is arranged in the middle of the bottom surface of the platform body 12, and the pin shaft 15 is used for connecting the piston rod earrings 8 with the platform hinge seat 14. The platform body 12 and the guide rail pressing plate 13 are in contact with the phase surface of the first support 5, and a wear-resistant maintenance-free composite copper plate is arranged on the contact surface. In another embodiment of the present invention, the platform body 12 is made of an all-steel structure.
As can be seen from fig. 4 and 5, the platform part 4 is mounted on the transmission guide rail formed by the first roller assembly 1 and the second roller assembly 2, the guide rail pressing plate 13 is used for hooking the first support 5 contacting with the platform part 4, the design can prevent the platform part from overturning, the platform hinge seat 14 of the platform part 4 is connected by the pin 15, and the motion performance of the platform part 4 is realized by controlling the hydraulic servo actuator 3.
The working process of the linear motion platform is as follows:
high-pressure oil for driving the hydraulic servo actuator to move enters a piston cavity of the hydraulic servo actuator, a piston rod of the hydraulic servo actuator extends out, the platform part 4 is driven to move through a piston rod ear ring 8, and the distance of the platform part 4 is detected by a displacement sensor 11. When the platform part 4 moves by the distance that reaches the set position, the supply of high-pressure oil to the piston chambers of the hydraulic servo actuators is stopped, and the platform part 4 is stopped at the set position.
In the invention, rolling friction is adopted to replace the sliding friction mode of the traditional motion platform guide rail, so that the friction resistance of the motion platform can be greatly reduced, and the driving mode of the hydraulic servo actuator is adopted, so that the heavy-load characteristic requirement of the motion platform can be met. The device has the advantages of compact and simple structure, low energy consumption and high efficiency.
it will be understood by those skilled in the art that the foregoing is only a preferred embodiment of the present invention, and is not intended to limit the invention, and that any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (6)
1. a linear motion platform, comprising a first roller assembly (1), a second roller assembly (2), a hydraulic servo actuator (3) and a platform part (4), wherein,
The first roller assemblies (1) and the second roller assemblies (2) are both arranged on a foundation steel structure, the plurality of second roller assemblies (2) are connected with the plurality of first roller assemblies (1) side by side to form a guide rail whole, the guide rail whole is used for supporting the platform part (4) and allowing the platform part (4) to move on the whole,
the first roller assembly (1) is distributed at two side edges below the platform part (4), the first roller assembly (1) comprises a first support (5), a second support (7) and rollers (6), the rollers (6) are arranged between the first support (5) and the second support (7) in parallel, the first support (5) and the second support (7) are parallel to each other,
the second roller assemblies (2) are distributed at the center below the platform part (4), the second roller assemblies (2) comprise two second supports (7) which are arranged in parallel and rollers (6), the rollers (6) are arranged between the two second supports (7) in parallel,
The hydraulic servo actuator (3) is arranged in the middle of the whole guide rail and is fixed on a foundation steel structure,
The bottom surface of the platform part (4) is connected with a hydraulic servo actuator (3), the hydraulic servo actuator (3) is used for driving the platform part (4) to move to a set position,
the platform component (4) comprises a platform body (12), guide rail pressing plates (13), a platform hinge seat (14) and a pin shaft (15), wherein the guide rail pressing plates (13) are arranged on two sides of the bottom surface of the platform body (12) and used for being buckled on a guide surface of the first support (5) in a pressing mode,
The platform hinge seat (14) is arranged in the middle of the bottom surface of the platform body (12), the pin shaft (15) is used for connecting the hydraulic servo actuator (3) with the platform hinge seat (14),
The platform body (12) and the guide rail pressing plate (13) are in contact with the upper surface of the first support (5), and a wear-resistant maintenance-free composite copper plate is installed on the contact surface.
2. A linear motion platform as claimed in claim 1, characterized in that said first support (5) and said second support (7) are elongated and have the same length,
the top of the first support (5) is provided with a guide surface which is in contact with the bottom of the platform part (4), the guide surface is smooth and flat, and the surface roughness Ra of the guide surface is not more than 3.2.
3. A linear motion platform according to claim 1 or 2, wherein the hydraulic servo actuators (3) comprise piston rod earrings (8), piston rods, actuator cylinders (9), actuator hinge mounts (10) and displacement sensors (11), wherein,
The piston rod is arranged in the actuator cylinder barrel (9), the piston rod earrings (8) are fixed at the front end of the piston rod and are used for being connected with the platform part (4), the actuator hinge seat (10) is arranged at the front end of the actuator cylinder barrel (9) and is used for fixing the actuator cylinder barrel (9) on a foundation steel structure,
The displacement sensor (11) is arranged at the tail of the actuator cylinder barrel (9) and used for detecting the displacement of the piston rod, so that the displacement detection of the platform part (4) is realized.
4. A linear motion platform according to claim 3, characterised in that the hydraulic servo actuators (3) are internally driven by hydraulic oil.
5. A linear motion platform according to claim 4, wherein eight second roller assemblies (2) are connected side by side with four first roller assemblies (1) to form a guide track entity,
four first roller assemblies (1) forming two rows symmetrically arranged along the hydraulic servo actuator (3), eight second roller assemblies (2) forming four rows symmetrically arranged along the hydraulic servo actuator (3),
Two rows of first roller assemblies (1) are distributed on two side edges of the platform part (4), and four rows of second roller assemblies (2) are distributed in the center of the platform part (4).
6. A linear motion platform as claimed in claim 5, wherein the platform body (12) is of all steel construction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710242810.1A CN106808221B (en) | 2017-04-14 | 2017-04-14 | linear motion platform for heavy load |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710242810.1A CN106808221B (en) | 2017-04-14 | 2017-04-14 | linear motion platform for heavy load |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106808221A CN106808221A (en) | 2017-06-09 |
| CN106808221B true CN106808221B (en) | 2019-12-06 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201710242810.1A Active CN106808221B (en) | 2017-04-14 | 2017-04-14 | linear motion platform for heavy load |
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| Country | Link |
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| CN (1) | CN106808221B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109469498B (en) * | 2018-12-29 | 2024-04-02 | 北京京水建设集团有限公司 | Mounting structure of lining steel pipe in narrow space of water delivery tunnel and construction method of mounting structure |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA1093048A (en) * | 1977-12-29 | 1981-01-06 | Louis W. Palmieri | Roller support assembly for machine carriage |
| DE4324059A1 (en) * | 1993-07-17 | 1995-01-19 | Manfred Artkaemper | Guide element for slide guides and a slide guide |
| CN102171467A (en) * | 2008-10-03 | 2011-08-31 | 施内贝格尔控股公司 | Fastening structure and method for fastening a guide rail of a linear guidance system |
| CN102500801A (en) * | 2011-10-14 | 2012-06-20 | 武汉大学 | Vertical double-sided milling machine of gantry |
| WO2012086952A3 (en) * | 2010-12-23 | 2012-09-07 | 두산인프라코어 주식회사 | Sliding bearing assembly using a roller bearing |
| CN202701780U (en) * | 2012-07-18 | 2013-01-30 | 上海三一精机有限公司 | Bed structure and machine tool |
| CN202943204U (en) * | 2012-11-30 | 2013-05-22 | 太原重工股份有限公司 | Scroll-mobile workbench of forging hydraulic press |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102233842B (en) * | 2010-04-30 | 2013-04-17 | 杨小虹 | Reciprocating motion device for container goods flat pallet in carriage |
-
2017
- 2017-04-14 CN CN201710242810.1A patent/CN106808221B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA1093048A (en) * | 1977-12-29 | 1981-01-06 | Louis W. Palmieri | Roller support assembly for machine carriage |
| DE4324059A1 (en) * | 1993-07-17 | 1995-01-19 | Manfred Artkaemper | Guide element for slide guides and a slide guide |
| CN102171467A (en) * | 2008-10-03 | 2011-08-31 | 施内贝格尔控股公司 | Fastening structure and method for fastening a guide rail of a linear guidance system |
| WO2012086952A3 (en) * | 2010-12-23 | 2012-09-07 | 두산인프라코어 주식회사 | Sliding bearing assembly using a roller bearing |
| CN102500801A (en) * | 2011-10-14 | 2012-06-20 | 武汉大学 | Vertical double-sided milling machine of gantry |
| CN202701780U (en) * | 2012-07-18 | 2013-01-30 | 上海三一精机有限公司 | Bed structure and machine tool |
| CN202943204U (en) * | 2012-11-30 | 2013-05-22 | 太原重工股份有限公司 | Scroll-mobile workbench of forging hydraulic press |
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| CN106808221A (en) | 2017-06-09 |
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