Electric push rod device for monorail traffic turnout

Abstract

The invention discloses an electric push rod device for a monorail traffic turnout. Monorail traffic comprises a foundation base (2) and a rail turnout beam body (5), and one end of an electric push rod (1) is installed on the foundation base (2); the other end is connected with the track fork beam body (5) through the sliding bearing assembly (4); the electric push rod (1) is placed on the boss base (7) through the supporting assembly (3), and the supporting bottom plate assembly (6) fixedly connected with the boss base (7) is arranged on the horizontal upper surface of the boss base (7). The supporting assembly (3) can horizontally slide on the supporting bottom plate assembly (6) relative to the boss base (7). By adopting the technical scheme, the levelness installation difficulty of the electric push rod is effectively reduced, the influence of the aging factor in the operation period on the levelness is eliminated, the usability and reliability of a turnout system are improved, and the maintenance cost is reduced.

Description

Technical Field

[0001] The present invention belongs to the technical field of rail transit engineering, and relates to turnout technology thereof. More specifically, the present invention relates to an electric push rod device for a monorail transit turnout. Background Art

[0002] The monorail turnout is a key equipment of the monorail system, and the electric push rod is the power source of the turnout system. It has no backup and is the key factor to ensure the safe, reliable and efficient operation of the monorail train.

[0003] Excessive horizontality of the electric push rod installation will produce additional bending moment, reduce the life of the electric push rod assembly or cause damage, or even cause the drive push rod failure. The installation quality of the turnout drive push rod during the construction period and the time factor during the operation period will cause the electric push rod installation horizontality to exceed the tolerance.

[0004] Using keywords such as "monorail; track; turnout; push rod" to search the existing public technical literature, the following search results are obtained:

[0005] 1. Chinese patent document: "Suspended monorail turnout power push rod control system, method and storage medium", patent (application) number: 202310225302.8; the technical solution recorded is:

[0006] “In a suspended monorail turnout power push rod control system, a first displacement detection device and a second displacement detection device are both arranged on the power push rod, the first displacement detection device and the second displacement detection device are respectively used to detect the push rod movement position of the power push rod, the first displacement detection device and the second displacement detection device are electrically connected to a data conversion transmitter, the data conversion transmitter is used to receive detection signals sent by the first displacement detection device and the second displacement detection device, and convert the detection signals according to preset conditions and send them to a controller, the controller is electrically connected to the power push rod and the data conversion transmitter”;

[0007] The technical effects recorded are:

[0008] "A redundant first displacement detection device and a second displacement detection device are set on the suspended monorail turnout power push rod. The two devices back up each other and can automatically switch the control mode, thereby improving the safety of the turnout."

[0009] 2. Chinese patent document: "A professional electric push rod for single-track turnout", patent (application) number: 202021829321.X; the technical solution recorded is:

[0010] "The driving assembly is started to drive the transmission assembly to rotate, including the transmission assembly protective cover. The driving assembly is installed on one side of the transmission assembly protective cover, and an L-shaped fixing seat is installed on the top of the transmission assembly protective cover. The planetary roller screw pair is driven to move by the transmission assembly, and then the telescopic tube is driven to move by the planetary roller screw pair; the vibration generated by the driving assembly during operation contacts the buffer assembly, and the energy consumption generated by the buffer assembly reduces the vibration and improves the stability. The movement of the telescopic tube is started to drive the dust cover to cooperate with each other to achieve the dustproof function";

[0011] The technical effects recorded are:

[0012] "It achieves stable telescopic movement, making it more impact-resistant; reduces vibration, improves stability; and achieves dust-proof function."

[0013] However, the technical solutions recorded in the above-mentioned technical documents and the related technical solutions currently in public application have not been able to solve the problems and defects of "excessive horizontality during installation and operation of the electric push rod" existing in the prior art. Summary of the invention

[0014] The invention provides an electric push rod device for a monorail traffic turnout, the purpose of which is to reduce the influence of horizontal errors during the installation and operation of the electric push rod.

[0015] In order to achieve the above object, the technical solution adopted by the present invention is:

[0016] The monorail traffic turnout electric push rod device of the present invention comprises a basic base and a track turnout beam body, one end of the electric push rod is installed on the basic base; the other end is connected to the track turnout beam body through a sliding bearing assembly; the electric push rod is placed on the boss base through a support assembly, and a support base plate assembly fixedly connected to the boss base is provided on the horizontal upper surface of the boss base; the support assembly can slide horizontally on the support base plate assembly relative to the boss base.

[0017] The electric push rod is provided with a push rod outer tube; the support assembly is provided with a push rod outer tube clamp and a support plate, and the push rod outer tube clamp and the support plate clamp the push rod outer tube tightly; the support plate and the support slide plate are connected as a whole; the support slide plate and the support base plate in the support base plate assembly are in planar contact and can slide relative to each other.

[0018] The supporting slide plate and the supporting bottom plate are both made of high-strength wear-resistant self-lubricating material.

[0019] An oiling nozzle is arranged on the supporting slide plate, and the oiling nozzle is used to add lubricating oil between the contact surface of the supporting slide plate and the supporting base plate assembly.

[0020] The electric push rod is provided with a motor at one end of the base; a screw shaft coaxially arranged therewith is provided in the inner cavity of the push rod outer tube, and the end of the screw shaft is connected to the main shaft of the motor through a reduction box; a screw nut is also provided in the inner cavity of the push rod outer tube, and the outer circle of the screw nut forms a sliding fit with the inner hole of the push rod outer tube; the internal threaded hole of the screw nut forms a threaded fit with the external thread of the screw shaft; the screw nut is fixedly connected to the power tube, and the power tube is sleeved on the screw shaft and forms a clearance fit; the power tube extends from the push rod outer tube at one end of the push rod outer tube of the track switch beam body, and is connected to the track switch beam body through a sliding bearing assembly.

[0021] Exhaust valves are arranged near the two ends of the push rod outer tube.

[0022] A plurality of push rod outer tube two-cavity vent holes are arranged at the joint portion of the screw nut and the power tube, and the push rod outer tube two-cavity vent holes are connected to the two inner cavities of the push rod outer tube.

[0023] The structure of the sliding bearing assembly is as follows: a joint bearing is arranged at the end of the power tube; a connecting shaft support seat is arranged on the track switch beam body, and the connecting shaft support seat fixes and supports the two ends of the joint connecting shaft arranged in the vertical direction; a self-lubricating bearing is arranged in the middle position of the joint connecting shaft; a transition sleeve is arranged in the inner hole of the joint bearing, and the self-lubricating bearing and the transition sleeve form a sliding fit.

[0024] Two locking nuts are arranged on the joint connection shaft, and the locking nuts are threadedly matched with the joint connection shaft; the locking nuts lock the joint bearing to realize the axial positioning of the joint bearing on the joint connection shaft.

[0025] Two coaxial rotating shafts are arranged at the end of the push rod outer tube at one end of the basic base; a rotating shaft mounting seat fixedly connected to the basic base is arranged; and the rotating shaft is mounted on the rotating shaft mounting seat through an oil-free lubricating bearing.

[0026] The present invention adopts the above technical solution to effectively reduce the difficulty of installing the horizontality of the electric push rod, eliminate the influence of time factors during the operation period on the horizontality, improve the availability and reliability of the turnout system, and reduce maintenance costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The contents shown in the attached drawings and the symbols in the drawings are briefly described as follows:

[0028] Figure 1 It is a three-dimensional schematic diagram of the structure of the present invention;

[0029] Figure 2 It is a top view schematic diagram of the structure of the present invention (excluding the track switch beam body);

[0030] Figure 3 for Figure 2 A schematic diagram of the structure of the screw nut and the two-chamber vent holes of the push rod outer tube (section view);

[0031] Figure 4 It is a schematic diagram of the structure of the rotating shaft, the rotating shaft mounting seat and the oil-free lubricating bearing in the present invention;

[0032] Figure 5 It is a structural schematic diagram of the support base plate assembly and the push rod outer tube in the present invention;

[0033] Figure 6 It is a schematic diagram of the structure of the connection between the power tube and the track switch beam body.

[0034] The markings in the figure are:

[0035] 1. Electric push rod, 2. Basic base, 3. Support assembly, 4. Sliding bearing assembly, 5. Track switch beam body, 6. Support bottom plate assembly, 7. Boss base, 8. Two-cavity vent holes of push rod outer tube;

[0036] 11. Motor, 12. Speed ​​reducer, 13. Screw nut, 14. Screw shaft, 15. Push rod outer tube, 16. Power tube, 17. Exhaust valve, 18. Rotating shaft, 19. Oil-free lubricated bearing, 20. Rotating shaft mounting seat;

[0037] 31. Push rod outer tube clamp, 32. Support plate, 33. Grease nozzle;

[0038] 41. Spherical bearing, 42. Baffle, 43. Joint connecting shaft, 44. Self-lubricating bearing, 45. Transition sleeve, 46. Locking nut, 47. Connecting shaft support seat;

[0039] 61. Support the slide plate. 62. Support the bottom plate. DETAILED DESCRIPTION

[0040] The specific implementation modes of the present invention are further explained in detail below by describing the embodiments with reference to the accompanying drawings, so as to help those skilled in the art to have a more complete, accurate and in-depth understanding of the inventive concept and technical solution of the present invention.

[0041] like Figures 1 to 6 The structure of the present invention is a monorail traffic switch electric push rod device, which is composed of an electric push rod 1, a support assembly 3, a sliding bearing assembly 4, a support base plate assembly 6, etc.

[0042] The monorail transportation comprises a basic base 2 and a track switch beam body 5 , one end of the electric push rod 1 is mounted on the basic base 2 ; the other end is connected to the track switch beam body 5 through a sliding bearing assembly 4 .

[0043] The specific analysis is as follows:

[0044] In order to solve the problems existing in the prior art and overcome its defects, and to achieve the purpose of reducing the influence of horizontal errors during the installation and operation of the electric linear actuator, the technical solution adopted by the present invention is:

[0045] like Figure 1 As shown, in the electric push rod device for a monorail turnout of the present invention, the electric push rod 1 is placed on a boss base 7 through a support assembly 3, and a support bottom plate assembly 6 fixedly connected to the boss base 7 is provided on the horizontal upper surface of the boss base 7; the support assembly 3 can slide horizontally relative to the boss base 7.

[0046] The basic base 2 and the boss base 7 provide two installation fulcrums for the electric push rod device. By adjusting the relative heights of the two fulcrums, it is ensured that the installation level of the electric push rod 1 meets the design requirements.

[0047] The support assembly 3 supports the electric push rod 1, and the electric push rod 1 can rotate in the horizontal direction without getting stuck through the relative sliding of the electric push rod 1. The above technical solution can effectively reduce the difficulty of horizontal installation of the electric push rod, eliminate the influence of time factors on horizontality during the operation period, improve the availability of the turnout system, and reduce maintenance costs.

[0048] like Figure 1 , Figure 5 As shown, in order to make the support of the push rod outer tube 15 more reliable and stable, the following technical solutions are adopted:

[0049] The electric push rod 1 is provided with a push rod outer tube 15; the support assembly 3 is provided with a push rod outer tube clamp 31 and a support plate 32, and the push rod outer tube clamp 31 and the support plate 32 clamp the push rod outer tube 15; the support plate 32 is connected to the support slide plate 61 as a whole; the support slide plate 61 is in planar contact with the support base plate assembly 6, and can slide relative to each other.

[0050] The support assembly 3 is fixedly connected to the electric push rod outer tube 15 through the push rod outer tube clamp 31; the lower surface of the support plate 32 is in planar contact with the support slide plate 61 in the support base plate assembly 6.

[0051] One end of the electric push rod device is installed on the basic base 2 through a bolt assembly, and the other end is connected to the single track switch beam body 5 through a sliding bearing assembly 4. A support assembly 3 is provided below the middle of the push rod; the support assembly 3 is in surface contact with a support bottom plate assembly 6 installed on the boss base 7.

[0052] The supporting slide plate 61 and the supporting base plate 62 in the supporting base plate assembly 6 are both made of high-strength wear-resistant self-lubricating materials, are firmly connected to the supporting base plate 62 through fasteners, and are installed on the base boss 7.

[0053] like Figure 5 As shown:

[0054] An oiling nozzle 33 is provided on the supporting slide plate 61 , and the oiling nozzle 33 is used to add lubricating oil between the contact surface of the supporting slide plate 61 and the supporting base plate assembly 6 .

[0055] During routine maintenance, lubricating grease can be added through the grease injection nozzle 33 to lubricate the moving friction pair of the support assembly 3 and the support base assembly 6 .

[0056] like Figure 2 As shown:

[0057] The electric push rod 1 is provided with a motor 11 at one end of the base 2; a screw shaft 14 coaxially arranged therewith is provided in the inner cavity of the push rod outer tube 15, and the end of the screw shaft 14 is connected to the main shaft of the motor 11 through a reduction box 12; a screw nut 13 is also provided in the inner cavity of the push rod outer tube 15, and the outer circle of the screw nut 13 forms a sliding fit with the inner hole of the push rod outer tube 15; the internal threaded hole of the screw nut 13 forms a threaded fit with the external thread of the screw shaft 14; the screw nut 13 is fixedly connected to a power tube 16, and the power tube 16 is sleeved on the screw shaft 14 and forms a clearance fit; the power tube 16 extends out of the push rod outer tube 15 from the push rod outer tube 15 at one end of the track switch beam body 5, and is connected to the track switch beam body 5 through a sliding bearing assembly 4.

[0058] The electric push rod 1 converts electrical energy into rotational kinetic energy through the motor 11, and drives the screw shaft 14 to perform rotational motion through the reduction box 12; the screw shaft 14 and the screw nut 13 form a ball screw pair, and the rotational motion of the screw shaft 14 is converted into linear motion of the screw nut and the power tube 16 connected thereto; by changing the forward and reverse rotation mode of the motor 11, the power tube 16 can be extended and retracted, thereby driving the single track switch beam 5 to move.

[0059] like Figure 2 As shown:

[0060] Exhaust valves 17 are provided near the two ends of the push rod outer tube 15 .

[0061] The inner cavity of the push rod outer tube 15 of the electric push rod is divided into two front and rear cavities by the screw nut 13; during the extension / retraction process of the screw nut 13, the air in the rear cavity is pulled / compressed, and the air in the front cavity is compressed / pulled. The pressure of the air in the front and rear cavities is different from the pressure of the screw nut 13, and the power tube 16 rebounds, affecting the positioning accuracy of the electric push rod 1. For this reason, exhaust valves 17 are respectively provided at both ends of the push rod outer tube 15 to ensure that the air pressure in the front and rear cavities is consistent during the operation of the electric push rod 1, thereby avoiding the rebound phenomenon and ensuring the positioning accuracy.

[0062] like Figure 3 As shown:

[0063] A plurality of push rod outer tube two-cavity vent holes 8 are provided at the joint portion of the screw nut 13 and the power tube 16, and the push rod outer tube two-cavity vent holes 8 are connected to the two inner cavities of the push rod outer tube 15, ensuring that the grease in the front and rear cavities can flow freely during the operation of the electric push rod 1, avoiding the pressure difference caused by tension / compression affecting the positioning accuracy of the electric push rod 1.

[0064] like Figure 6 As shown:

[0065] The structure of the sliding bearing assembly 4 is as follows: a joint bearing 41 is arranged at the end of the power tube 16; a connecting shaft support seat 47 is arranged on the track switch beam body 5, and the connecting shaft support seat 47 fixes and supports the two ends of the joint connecting shaft 43 arranged in the vertical direction; a self-lubricating bearing 44 is arranged in the middle position of the joint connecting shaft 43; a transition sleeve 45 is arranged in the inner hole of the joint bearing 41, and the self-lubricating bearing 44 and the transition sleeve 45 form a sliding fit.

[0066] The spherical bearing 41 in the sliding bearing assembly 4 is reliably connected to the power tube 16 in the electric push rod 1, and the inner ring is transitionally matched with the transition sleeve 45; the outer ring of the self-lubricating bearing 44 is clearance-matched with the inner ring of the transition sleeve 45;

[0067] Two locking nuts 46 are provided on the joint connecting shaft 43 , and the locking nuts 46 and the joint connecting shaft 43 are threadedly matched; the locking nuts 46 lock the joint bearing 41 to achieve axial positioning of the joint bearing 41 on the joint connecting shaft 43 .

[0068] Baffles 42 are provided at the upper and lower parts respectively. The baffles 42, self-lubricating bearings 44, transition sleeves 45 and joint bearings 41 are formed into a whole through locking nuts 46. The joint connecting shaft 43 is reliably connected to the track switch beam body 5 through fasteners, and the inner ring of the self-lubricating bearing 44 is clearance-matched with the joint connecting shaft 43.

[0069] The baffle 42 can limit the position of the joint bearing, and can effectively prevent the power tube 16 from following the rotation under the action of the friction force between the ball screw pairs, thereby improving the positioning accuracy of the electric push rod 1.

[0070] The joint bearing 41 in the sliding bearing assembly 4 can automatically adjust the swing of the track switch beam 5 during the switching process or when the train passes through the switch beam; in addition, since the self-lubricating bearing 44 and the joint connecting shaft 43 are clearance-matched, they can slide freely in the vertical direction, and can automatically correct the height changes caused by environmental aging factors during the operation of the switch beam, and can effectively eliminate the influence of aging factors during the operation period on the horizontality, avoid generating additional loads on the electric push rod 1 except for the axial direction, and improve the availability of the switch system.

[0071] like Figure 4 As shown:

[0072] At the end of the push rod outer tube 15 located at one end of the basic base 2, two coaxial rotating shafts 18 are arranged above and below; a rotating shaft mounting seat 20 fixedly connected to the basic base 2 is arranged; the rotating shaft 18 is mounted on the rotating shaft mounting seat 20 through an oil-free lubricating bearing 19.

[0073] The rotating shaft 18 of the electric push rod is clearance-matched with the oil-free lubricating bearing 19 , and the oil-free lubricating bearing 19 is transitionally matched with the rotating shaft mounting seat 20 to form a hinge shaft connection pair, and the electric push rod 1 can rotate and swing around the center line of the rotating shaft 18 .

[0074] The electric push rod 1 extends or retracts, thereby pushing the single track switch beam to rotate around the rotation axis; at the same time, the electric push rod 1 rotates accordingly around the rotation axis 18 as the single track switch beam rotates, and the support assembly 3 installed on the outer tube 15 of the electric push rod rotates together. Since the support assembly 3 and the slide plate of the supporting bottom plate assembly 6 are in surface contact, they can slide relative to each other smoothly and smoothly; at the same time, the electric push rod 1 and the track switch beam body 5 can rotate relative to the track switch beam body 5 around the sliding bearing assembly 4, thereby improving the reliability of the switch system.

[0075] The present invention is described above by way of example in conjunction with the accompanying drawings. It is obvious that the specific implementation of the present invention is not limited to the above-mentioned method. As long as various non-substantial improvements are made using the method concept and technical solution of the present invention, or the concept and technical solution of the present invention are directly applied to other occasions without improvement, they are all within the protection scope of the present invention.

Claims

1. An electric push rod device for a monorail turnout, the monorail comprising a base (2) and a turnout beam (5), one end of the electric push rod (1) being mounted on the base (2); the other end being connected to the turnout beam (5) via a sliding bearing assembly (4); characterized in that: The electric push rod (1) is placed on the boss base (7) through a support assembly (3), and a support base assembly (6) fixedly connected to the boss base (7) is arranged on the horizontal upper surface of the boss base (7); the support assembly (3) can slide horizontally on the support base assembly (6) relative to the boss base (7).

2. The electric push rod device for monorail turnout according to claim 1, characterized in that: The electric push rod (1) is provided with a push rod outer tube (15); the support assembly (3) is provided with a push rod outer tube clamp (31) and a support plate (32), and the push rod outer tube clamp (31) and the support plate (32) clamp the push rod outer tube (15); the support plate (32) and the support slide plate (61) are connected as a whole; the support slide plate (61) and the support base plate (62) in the support base plate assembly (6) are in planar contact and can slide relative to each other.

3. The electric push rod device for monorail turnout according to claim 2, characterized in that: The supporting slide plate (61) and the supporting base plate (62) are both made of high-strength wear-resistant self-lubricating material.

4. The electric push rod device for monorail turnout according to claim 2, characterized in that: An oiling nozzle (33) is arranged on the supporting slide plate (61), and the oiling nozzle (33) is used to inject lubricating oil between the contact surface of the supporting slide plate (61) and the supporting base plate assembly (6).

5. The electric push rod device for monorail turnout according to claim 2, characterized in that: The electric push rod (1) is located at one end of the base (2) and a motor (11) is arranged; a screw shaft (14) coaxially arranged therewith is arranged in the inner cavity of the push rod outer tube (15), and the end of the screw shaft (14) is connected to the main shaft of the motor (11) through a reduction box (12); a screw nut (13) is also arranged in the inner cavity of the push rod outer tube (15), and the outer circle of the screw nut (13) forms a sliding fit with the inner hole of the push rod outer tube (15); the internal threaded hole of the screw nut (13) forms a threaded fit with the external thread of the screw shaft (14); the screw nut (13) is fixedly connected to a power tube (16), and the power tube (16) is sleeved on the screw shaft (14) and forms a clearance fit; the power tube (16) extends out of the push rod outer tube (15) from one end of the push rod outer tube (15) located on the track switch beam body (5), and is connected to the track switch beam body (5) through a sliding bearing assembly (4).

6. The electric push rod device for monorail turnout according to claim 5, characterized in that: Exhaust valves (17) are arranged near the two ends of the push rod outer tube (15).

7. The electric push rod device for a monorail turnout according to claim 5, characterized in that: A plurality of push rod outer tube two-cavity vent holes (8) are provided at the joint portion between the screw nut (13) and the power tube (16), and the push rod outer tube two-cavity vent holes (8) are connected to the two inner cavities of the push rod outer tube (15).

8. The electric push rod device for monorail turnout according to claim 5, characterized in that: The structure of the sliding bearing assembly (4) is as follows: a joint bearing (41) is arranged at the end of the power tube (16); a connecting shaft support seat (47) is arranged on the track switch beam body (5), and the connecting shaft support seat (47) fixes and supports the two ends of the joint connecting shaft (43) arranged in the vertical direction; a self-lubricating bearing (44) is arranged at the middle position of the joint connecting shaft (43); a transition sleeve (45) is arranged in the inner hole of the joint bearing (41), and the self-lubricating bearing (44) and the transition sleeve (45) form a sliding fit.

9. The electric push rod device for a monorail turnout according to claim 8, characterized in that: Two locking nuts (46) are arranged on the joint connection shaft (43), and the locking nuts (46) and the joint connection shaft (43) are threadedly matched; the locking nuts (46) lock the joint bearing (41) to achieve axial positioning of the joint bearing (41) on the joint connection shaft (43).

10. The electric push rod device for monorail turnout according to claim 1, characterized in that: Two coaxial rotating shafts (18) are arranged at the end of the push rod outer tube (15) at one end of the basic base (2); a rotating shaft mounting seat (20) fixedly connected to the basic base (2) is arranged on the basic base (2); and the rotating shaft (18) is mounted on the rotating shaft mounting seat (20) via an oil-free lubricating bearing (19).

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