A guiding mechanism for a telescopic beam

Abstract

The invention discloses a guiding mechanism for a telescopic beam, comprising an inner guide beam, a mounting plate, a guide piece, a main guide beam, a fixing plate, a guide wheel, a polytetrafluoroethylene plate, a limiting plate, a supporting plate, a stop washer, a countersunk screw, a roller and a guiding device. The main guide beam is sleeved on the outer side of the inner guide beam, and the main guide beam is slidably connected to the inner guide beam. The mounting plates are symmetrically fixed to the top and bottom of one end of the inner guide beam, and a placement groove is symmetrically opened on one side of the mounting plate, and the placement groove runs through the mounting plate, and support plates are symmetrically fixed to the two sides of the placement groove on the other side of the mounting plate. The invention cooperates with the guide wheel and the roller, and when the load is large, the polytetrafluoroethylene plate will also contact, which ensures the guiding rigidity and greatly reduces the friction resistance, so that the movement of the inner guide beam is in a straight line, and the end of the inner guide beam that moves out of the main guide beam is prevented from sinking under the action of its own gravity, and the telescopic guide beam is prevented from deformation.

Description

Technical Field

[0001] The invention relates to a guiding mechanism, in particular to a guiding mechanism for a telescopic beam, and belongs to the technical field of telescopic beam application. Background Art

[0002] With the rapid development of social science and technology, urban construction has become a top priority. Many large machines are often used in urban construction. For some large machines that are difficult to move, we need to use some special transport devices, among which telescopic beams are one of them.

[0003] The existing patent authorization announcement number is CN202250117U, which is a telescopic beam mechanism. The telescopic beam mechanism makes the beam body more evenly stressed and can meet the ability to support the top plate with the smallest possible size. However, the telescopic beam mechanism does not have a guide mechanism, which is more troublesome for telescoping and cannot achieve smooth support and sliding of the inner guide beam. At the same time, the rigidity of the rotating mechanism in the existing guide mechanism is low and it is easy to cause damage. For this reason, we propose a guide mechanism for a telescopic beam. Summary of the invention

[0004] The purpose of the present invention is to cooperate with the guide wheel and the roller. When the load is large, the polytetrafluoroethylene plates will also come into contact, which ensures the guiding stiffness while greatly reducing the friction resistance, so that the movement of the inner guide beam is in a straight line, preventing the inner guide beam from moving out of the main beam and sinking under the action of its own gravity, preventing the telescopic guide beam from deformation, and rotatably connecting with the pin shaft through the needle bearing, and rotatably connecting the pin shaft with its corresponding support plate and limit plate, so that the rotational resistance between the guide wheel and the roller and their corresponding pin shaft is reduced.

[0005] The technical problems solved by the present invention are:

[0006] (1) How to support and slide one end of the inner guide beam itself by rollers installed at the top and bottom of one end of the inner guide beam, and at the same time, support and slide the other end of the inner guide beam by guide wheels installed at the top and bottom of the end of the main beam away from the roller, so as to solve the problem of difficulty in stably supporting and sliding the inner guide beam in the prior art;

[0007] (2) How to use rollers and guide wheels to drive the corresponding needle bearings to rotate respectively, so that the needle bearings drive the pin shaft to rotate, and the pin shaft is rotatably connected with the corresponding support plate and limit plate, so as to solve the problem of low rigidity of the rotary mechanism in the prior art.

[0008] The object of the present invention can be achieved by the following technical scheme: A guide mechanism for a telescopic beam, comprising an inner guide beam, a mounting plate, a guide sheet, a main guide beam, a fixing plate, a guide wheel, a PTFE plate, a limit plate, a support plate, a stop washer, a countersunk screw, a roller and a guide device, wherein the main guide beam is sleeved on the outer side of the inner guide beam, and the main guide beam is slidably connected to the inner guide beam;

[0009] A mounting plate is symmetrically fixed to the top and bottom of one end of the inner guide beam, a placement groove is symmetrically opened on one side of the mounting plate, and the placement groove runs through the mounting plate, and a support plate is symmetrically fixed on both sides of the placement groove on the other side of the mounting plate, a roller is arranged in the placement groove, and the roller is located between two symmetrically arranged support plates, and the roller is rotatably connected to the two symmetrically arranged support plates through a guide device;

[0010] A fixing plate is symmetrically fixed to the top and bottom of one end of the main guide beam away from the mounting plate, a limiting plate is symmetrically fixed to one side of the fixing plate close to the inner guide beam, a polytetrafluoroethylene plate is arranged on one side of the fixing plate close to the inner guide beam, and both ends of the polytetrafluoroethylene plate are respectively fixedly connected to two symmetrically arranged limiting plates, guide wheels are symmetrically arranged on both sides of the polytetrafluoroethylene plate, and the guide wheels are located between the two symmetrically arranged limiting plates, and the guide wheels are rotatably connected to the two symmetrically arranged limiting plates through a guide device;

[0011] Among them, the guide device is composed of a stop washer, a pin shaft, a needle bearing, a spacer sleeve and a round nut. A pin shaft is provided on one side of the limit plate and the support plate. One end of the pin shaft passes through two pairs of limit plates and the support plate respectively. The pin shaft is rotatably connected with the limit plate and the support plate respectively through bearings, and the guide wheel and the roller are respectively sleeved on the outside of the corresponding pin shaft, and needle bearings are equidistantly provided at both ends of the guide wheel and the roller. Spacer sleeves are provided at both ends of the guide wheel and the roller, and the needle bearing is located between the spacer sleeve and the middle section of the pin shaft, and the needle bearing and the spacer sleeve are both sleeved on the outside of the pin shaft, and the end of the pin shaft with a thread is sleeved with a round nut, and the round nut is meshed with the pin shaft through a thread.

[0012] A further technical improvement of the present invention is that guide pieces are arranged at four corners of one side of the mounting plate away from the supporting plate, and the guide pieces are fixedly connected to the mounting plate by countersunk screws.

[0013] A further technical improvement of the present invention is that a stop washer is arranged on one side of the round nut close to the pin shaft, and the stop washer is sleeved on the outside of the pin shaft.

[0014] A further technical improvement of the present invention is that the outer side of the roller passes through the top and bottom of the mounting plate.

[0015] A further technical improvement of the present invention is that four needle roller bearings are provided.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] When the length of the telescopic beam needs to be adjusted, the inner guide beam is pushed toward the end away from the main beam, so that the inner guide beam slides in the main beam. Since the symmetrically arranged mounting plates are located at the top and bottom of one end of the inner guide beam, the symmetrically arranged fixing plates are at the top and bottom of the end of the main beam away from the mounting plate, and the guide wheels on the side of the fixing plate close to the inner guide beam roll on the inner guide wheels, thereby playing a sliding role for the inner guide beam. The mounting plate is fixed to the end of the inner guide beam away from the fixing plate, and the roller on the top of the mounting plate contacts the main beam, so that the roller slides on the inner wall of the top of the main beam. Through the cooperation between the guide wheel and the roller, when the load is large, the polytetrafluoroethylene plate will also contact, which ensures the guiding rigidity and greatly reduces the friction resistance, so that the movement of the inner guide beam is in a straight line, preventing the end of the inner guide beam moving out of the main beam from sinking under the action of its own gravity, and preventing the telescopic guide beam from deformation.

[0018] 2. The main guide beam and the inner guide beam respectively drive the guide wheel and the roller to rotate, and the roller and the guide wheel respectively drive the corresponding needle bearings to rotate. Since the needle bearing is rotatably connected to the pin shaft, the pin shaft and its corresponding support plate and limit plate are rotatably connected, so that the rotational resistance between the guide wheel and the roller and their corresponding pin shafts is reduced, and the multiple bearings arranged in the guide device improve the rigidity of the slewing mechanism, and the inner guide beam slides faster and more stably in the main guide beam. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to facilitate understanding by those skilled in the art, the present invention is further described below with reference to the accompanying drawings.

[0020] Figure 1 It is a schematic diagram of the overall three-dimensional structure of the present invention;

[0021] Figure 2 This is a schematic diagram of the structure of the mounting plate of the present invention;

[0022] Figure 3 It is a schematic diagram of the structure of the guide device of the present invention;

[0023] Figure 4 This is a schematic diagram of the fixing plate structure of the present invention;

[0024] Figure 5 This is a front view structural schematic diagram of the fixing plate of the present invention.

[0025] In the figure: 1. inner guide beam; 2. mounting plate; 3. guide plate; 4. main guide beam; 5. fixing plate; 6. guide wheel; 7. PTFE plate; 8. limit plate; 9. support plate; 10. stop washer; 11. countersunk screw; 12. pin; 13. needle bearing; 14. spacer; 15. roller; 16. round nut; 17. placement groove; 18. guide device. DETAILED DESCRIPTION

[0026] The technical solution of the present invention will be clearly and completely described below in conjunction with the embodiments. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0027] See also Figure 1-5 As shown, a guiding mechanism for a telescopic beam comprises an inner guide beam 1, a mounting plate 2, a guide sheet 3, a main guide beam 4, a fixing plate 5, a guide wheel 6, a PTFE plate 7, a limit plate 8, a support plate 9, a stop washer 10, a countersunk screw 11, a roller 15 and a guiding device 18. The main guide beam 4 is sleeved on the outer side of the inner guide beam 1, and the main guide beam 4 is slidably connected to the inner guide beam 1;

[0028] A mounting plate 2 is symmetrically fixed at the top and bottom of one end of the inner guide beam 1, a placement groove 17 is symmetrically opened on one side of the mounting plate 2, and the placement groove 17 penetrates the mounting plate 2, and a support plate 9 is symmetrically fixed on both sides of the placement groove 17 on the other side of the mounting plate 2, a roller 15 is arranged in the placement groove 17, and the roller 15 is located between two symmetrically arranged support plates 9, and the roller 15 is rotatably connected to the two symmetrically arranged support plates 9 through a guide device 18;

[0029] A fixing plate 5 is symmetrically fixed to the top and bottom of one end of the main guide beam 4 away from the mounting plate 2, a limiting plate 8 is symmetrically fixed to one side of the fixing plate 5 close to the inner guide beam 1, a polytetrafluoroethylene plate 7 is arranged on one side of the fixing plate 5 close to the inner guide beam 1, and both ends of the polytetrafluoroethylene plate 7 are respectively fixedly connected to two symmetrically arranged limiting plates 8, guide wheels 6 are symmetrically arranged on both sides of the polytetrafluoroethylene plate 7, and the guide wheels 6 are located between the two symmetrically arranged limiting plates 8, and the guide wheels 6 are rotatably connected to the two symmetrically arranged limiting plates 8 through a guide device 18;

[0030] Among them, the guide device 18 is composed of a stop washer 10, a pin shaft 12, a needle bearing 13, a spacer sleeve 14 and a round nut 16. A pin shaft 12 is provided on one side of the limit plate 8 and the support plate 9. One end of the pin shaft 12 passes through the two limit plates 8 and the support plate 9 respectively. The pin shaft 12 is rotatably connected with the limit plate 8 and the support plate 9 respectively through bearings, and the guide wheel 6 and the roller 15 are respectively sleeved on the outside of the corresponding pin shaft 12, and needle bearings 13 are equidistantly provided at both ends of the guide wheel 6 and the roller 15. Spacers 14 are provided at both ends of the guide wheel 6 and the roller 15, and the needle bearing 13 is located between the spacer sleeve 14 and the middle section of the pin shaft 12, and the needle bearing 13 and the spacer sleeve 14 are both sleeved on the outside of the pin shaft 12, and the end of the pin shaft 12 with a thread is sleeved with a round nut 16, and the round nut 16 is meshed with the pin shaft 12 through a thread.

[0031] Guide pieces 3 are provided at the four corners of the mounting plate 2 away from the support plate 9, and the guide pieces 3 are fixedly connected to the mounting plate 2 by countersunk screws 11. The setting of the guide pieces 3 increases the sliding stability between the inner guide beam 1 and the main guide beam 4.

[0032] A stop washer 10 is provided on one side of the round nut 16 close to the pin shaft 12 , and the stop washer 10 is sleeved on the outside of the pin shaft 12 . The setting of the stop washer 10 increases the connection stability between the pin shaft 12 and the limiting plate 8 and the supporting plate 9 .

[0033] The outer side of the roller 15 passes through the top and bottom of the mounting plate 2 , and the roller 15 passes through the mounting plate 2 , so that the roller 15 and the main beam 4 can cooperate with each other.

[0034] Four needle roller bearings 13 are provided, and the rigidity of the rotary mechanism is improved by providing the four needle roller bearings 13 .

[0035] Working principle: When the present invention is in use, when it is necessary to adjust the length of the telescopic beam, the inner guide beam 1 is pushed toward the end away from the main guide beam 4, so that the inner guide beam 1 slides in the main guide beam 4. Since the symmetrically arranged mounting plates 2 are located at the top and bottom of one end of the inner guide beam 1, the symmetrically arranged fixing plates 5 are at the top and bottom of the end of the main guide beam 4 away from the mounting plates 2, and the guide wheel 6 on the side of the fixing plate 5 close to the inner guide beam 1 rolls on the inner guide wheel 6, thereby playing a sliding role for the inner guide beam 1. The mounting plate 2 is fixed to the end of the inner guide beam 1 away from the fixing plate 5, and the roller 15 on the top of the mounting plate 2 contacts the main guide beam 4, so that the roller 15 slides on the inner wall at the top of the main guide beam 4. The guide wheel 6 cooperates with the roller 15. When the load is large , the PTFE plate 7 will also contact the main guide beam 4, ensuring the guiding stiffness while greatly reducing the friction resistance, so that the movement of the inner guide beam 1 is in a straight line, preventing the end of the inner guide beam 1 that moves out of the main guide beam 4 from sinking under the action of its own gravity, and preventing the telescopic guide beam from deformation; the main guide beam 4 and the inner guide beam 1 respectively drive the guide wheel 6 and the roller 15 to rotate, and the roller 15 and the guide wheel 6 respectively drive the corresponding needle bearings 13 to rotate. Since the needle bearing 13 is rotatably connected to the pin shaft 12, the pin shaft 12 and its corresponding support plate 9 and the limit plate 8 are rotatably connected, so that the rotational resistance between the guide wheel 6 and the roller 15 and its corresponding pin shaft 12 is reduced, and the sliding of the inner guide beam 1 in the main guide beam 4 is faster and more stable.

[0036] The preferred embodiments of the present invention disclosed above are only used to help explain the present invention. The preferred embodiments do not describe all the details in detail, nor do they limit the invention to only specific implementation methods. Obviously, many modifications and changes can be made according to the content of this specification. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the present invention, so that those skilled in the art can understand and use the present invention well. The present invention is limited only by the claims and their full scope and equivalents.

Claims

1. A guide mechanism for a telescopic beam, characterized in that: The invention comprises an inner guide beam (1), a mounting plate (2), a guide plate (3), a main guide beam (4), a fixing plate (5), a guide wheel (6), a polytetrafluoroethylene plate (7), a limit plate (8), a support plate (9), a stop washer (10), a countersunk screw (11), a roller (15) and a guide device (18); the main guide beam (4) is sleeved on the outer side of the inner guide beam (1), and the main guide beam (4) is slidably connected to the inner guide beam (1); A mounting plate (2) is symmetrically fixed at the top and bottom of one end of the inner guide beam (1); a placement groove (17) is symmetrically opened on one side of the mounting plate (2), and the placement groove (17) penetrates the mounting plate (2); a support plate (9) is symmetrically fixed on both sides of the placement groove (17) on the other side of the mounting plate (2); a roller (15) is arranged in the placement groove (17), and the roller (15) is located between two symmetrically arranged support plates (9); and the roller (15) is rotatably connected to the two symmetrically arranged support plates (9) through a guide device (18); A fixing plate (5) is symmetrically fixed to the top and bottom of one end of the main guide beam (4) away from the mounting plate (2); a limiting plate (8) is symmetrically fixed to the side of the fixing plate (5) close to the inner guide beam (1); a polytetrafluoroethylene plate (7) is arranged on the side of the fixing plate (5) close to the inner guide beam (1), and the two ends of the polytetrafluoroethylene plate (7) are respectively fixedly connected to two symmetrically arranged limiting plates (8); guide wheels (6) are symmetrically arranged on both sides of the polytetrafluoroethylene plate (7), and the guide wheel (6) is located between the two symmetrically arranged limiting plates (8); and the guide wheel (6) is rotatably connected to two symmetrically arranged limiting plates (8) through a guide device (18); The guide device (18) is composed of a stop washer (10), a pin shaft (12), a needle bearing (13), a spacer (14) and a round nut (16). A pin shaft (12) is provided on one side of the limit plate (8) and the support plate (9). One end of the pin shaft (12) passes through two pairs of limit plates (8) and the support plate (9). The pin shaft (12) is rotatably connected to the limit plate (8) and the support plate (9) through bearings. The guide wheel (6) and the roller (15) are respectively sleeved on the corresponding pin shafts ( 12), needle bearings (13) are equidistantly arranged at both ends of the guide wheel (6) and the roller (15), spacer sleeves (14) are arranged at both ends of the guide wheel (6) and the roller (15), and the needle bearing (13) is located between the spacer sleeve (14) and the middle section of the pin shaft (12), and the needle bearing (13) and the spacer sleeve (14) are both sleeved on the outside of the pin shaft (12), and a round nut (16) is sleeved on one end of the pin shaft (12) with a thread, and the round nut (16) is meshed and connected with the pin shaft (12) through a thread; Guide plates (3) are provided at four corners of one side of the mounting plate (2) away from the support plate (9), and the guide plates (3) are fixedly connected to the mounting plate (2) by countersunk screws (11); Four needle roller bearings (13) are provided.

2. A guide mechanism for a telescopic beam according to claim 1, characterized in that: A stop washer (10) is provided on one side of the round nut (16) close to the pin shaft (12), and the stop washer (10) is sleeved on the outside of the pin shaft (12).

3. The guide mechanism for a telescopic beam according to claim 1, characterized in that: The outer side of the roller (15) passes through the top and bottom of the mounting plate (2).

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