Screw rod assembling mechanism

Abstract

The utility model discloses a lead screw assembling mechanism. The lead screw assembling mechanism comprises a rack; the sliding rail frame clamping and fixing unit is arranged on the rack; the horizontal sliding rail is arranged on the rack, and the sliding direction of the horizontal sliding rail is parallel to the axis of the sliding rail frame clamping and fixing unit; the lead screw piece fixing unit is arranged on the horizontal sliding rail and right faces the sliding rail frame clamping and fixing unit. The constant-force horizontal driving unit is arranged on the rack and connected with the screw rod piece fixing unit; the reset unit is arranged on the lower surface of the rack, and the telescopic end of the reset unit abuts against the lead screw piece fixing unit in the moving direction during assembly; the assembly quantity detection unit is arranged on the rack, and a detection part is connected with the screw rod piece fixing unit; the torsion driving unit is arranged on the rack, located on one side of the sliding rail frame clamping and fixing unit, right faces the gear box in the sliding rail frame and can be inserted into the gear box in the sliding rail frame in a penetrating mode to control a gear in the gear box to rotate. According to the utility model, the screw rod can be aligned with the gearbox of the electric seat for automatic rotating assembly, and the working efficiency and the assembly quality are improved.

Description

Technical Field

[0001] The utility model relates to the field of electric chair slide rail assembly, in particular to a screw rod assembly mechanism. Background Art

[0002] The electric seat rail structure includes a rail frame, a screw, and a gear box (rotationally connected to the control motor) that controls the screw to move in the rail frame. Therefore, when assembling the electric seat rail, the screw needs to be screwed into the gear box to complete the assembly. During the screw-in process, the parts with internal thread holes in the gear box need to be aligned first, and then the screw needs to be rotated while keeping the two coaxial. Therefore, the manual assembly requirements are high, and the screw needs to be controlled to rotate at all times during the assembly process to achieve screw-in, which is very inefficient. Utility Model Content

[0003] In view of the above-mentioned defects of the prior art, the purpose of the utility model is to provide a screw assembly mechanism, which can realize the automatic rotation assembly of the screw and the gear box of the electric seat so as to improve the work efficiency and assembly quality.

[0004] The purpose of the utility model is achieved through such technical solution:

[0005] A screw assembly mechanism, comprising:

[0006] frame;

[0007] The slide rail frame clamps the fixing unit and is arranged on the frame;

[0008] A horizontal slide rail is arranged on the frame, and the sliding direction is parallel to the axis of the clamping and fixing unit of the slide rail frame;

[0009] The screw rod fixing unit is arranged on the horizontal slide rail and is directly opposite to the slide rail frame clamping fixing unit;

[0010] A fixed force horizontal driving unit is arranged on the frame and connected to the screw rod fixing unit;

[0011] The reset unit is arranged on the lower surface of the frame, and the telescopic end is opposed to the moving direction of the screw rod fixing unit when assembled;

[0012] An assembly amount detection unit is arranged on the frame, and a detection part is connected to the screw rod fixing unit;

[0013] The torque drive unit is arranged on the frame, located on one side of the slide rail frame clamping and fixing unit, facing the gear box in the slide rail frame, and can be inserted into the gear box in the slide rail frame to control the rotation of the gears inside the gear box.

[0014] Furthermore, the slide rail frame clamping and fixing unit comprises:

[0015] A placement seat is fixed on the frame, and at least two positioning columns are provided on the upper surface;

[0016] At least two sliding shafts are arranged in parallel and spaced apart in the placement seat, with both ends exposed;

[0017] Two clamping claws are respectively arranged on both sides of the placement seat and connected to the exposed ends of the two sliding shafts;

[0018] The clamping electric cylinder is installed on a clamping claw, and the telescopic end passes through the placement seat and is connected with the other clamping claw; the axis of the clamping electric cylinder is parallel to the sliding shaft.

[0019] Furthermore, the clamping claw is provided with a notch, which faces the clamping slide rail frame; the clamping electric cylinder is provided with an in-position detection sensor, which faces the notch of the adjacent clamping claw; the output end of the torque drive unit passes through the notch of the clamping claw and faces the gear box in the slide rail frame.

[0020] Furthermore, the frame is provided with a strip-shaped hole that moves along the screw rod fixing unit;

[0021] The screw rod fixing unit comprises:

[0022] The base is slidably connected to the horizontal slide rail; the fixed force horizontal driving unit and the assembly amount detection unit are both connected to the base; the telescopic end of the reset unit is offset from the movement direction when assembled with the base;

[0023] A vertical lifting guide assembly is vertically arranged on the base;

[0024] The lifting electric cylinder is vertically upwardly arranged on the lower surface of the base and connected to the telescopic end of the vertical lifting guide assembly;

[0025] The fixing seat is arranged on the telescopic end of the vertical lifting guide assembly; the fixing seat is provided with a receiving groove for embedding the wire rod.

[0026] Furthermore, the fixing seat is provided with a receiving groove, and the receiving groove is in contact with the surface of the screw rod; the fixing seat is provided with an outwardly projecting support rod, and the upper surface of the support rod is provided with an arc groove matching the surface of the screw rod.

[0027] Furthermore, the constant force horizontal driving unit comprises:

[0028] A drag plate connected to the base;

[0029] A pulley is arranged on the frame;

[0030] A pull rope, one end of which is connected to the pallet and the other end is passed around the pulley;

[0031] The weight plate is connected to the other end of the stretcher. Under the gravity of the weight plate, the slide plate drags the base along the horizontal slide rail to move in the direction of the slide rail frame clamping and fixing unit.

[0032] Furthermore, the reset unit comprises:

[0033] The reset electric cylinder is arranged on the lower surface of the frame, and the movement direction is parallel to the axis of the horizontal slide rail;

[0034] The reset plate is connected with the moving end of the reset electric cylinder and abuts against the surface of the support plate facing the slide rail frame clamping and fixing unit.

[0035] Furthermore, the assembly quantity detection unit comprises:

[0036] The displacement sensor is arranged on the frame parallel to the axis direction of the horizontal slide rail;

[0037] A connecting plate has one end connected to the base and the other end connected to the moving end of the displacement sensor.

[0038] Furthermore, the torque drive unit comprises:

[0039] A driving sliding assembly is arranged on the frame, and the sliding direction is perpendicular to the horizontal slide rail;

[0040] A driving electric cylinder is arranged on the frame and controls the movement of the driving sliding assembly;

[0041] A driving motor is arranged on the sliding end of the driving sliding assembly;

[0042] The torsion bar is connected with the rotating shaft of the driving motor and faces the gear box in the slide rail frame clamped by the slide rail frame clamping fixing unit.

[0043] Furthermore, the driving motor is slidably connected to the sliding end of the driving sliding assembly via a guide shaft; a spring is disposed on the outer sleeve of the guide shaft, one end of the spring abuts against the driving motor, and the other end abuts against the sliding end of the driving sliding assembly.

[0044] By adopting the above technical solution, the utility model has the following advantages:

[0045] 1. The screw is screwed in by fixing the screw rod and moving it horizontally, controlling the rotation of the gear box. Compared with controlling the screw rod to rotate and screw in, it is better controlled and the screw rod assembly is smoother.

[0046] 2. The design of screw fixing unit and slide rail clamping fixing unit eliminates the need for manual control, realizes fully automatic alignment and improves production efficiency.

[0047] 3. The use of a constant-force horizontal drive unit can control the force of the screw-in, thereby preventing conventional drive equipment from continuously applying force to the screw when the screw and the gear box are stuck, causing damage to the screw or gear box.

[0048] Other advantages, objectives and features of the present invention will be described in the following description to some extent, and will be apparent to those skilled in the art based on the following examination and study, or may be taught from the practice of the present invention to some extent. BRIEF DESCRIPTION OF THE DRAWINGS

[0049] The accompanying drawings of the present utility model are as follows:

[0050] Figure 1 Schematic diagram of the three-dimensional structure of the screw assembly mechanism in the embodiment.

[0051] Figure 2 for Figure 1 Enlarged structural diagram at A in the middle.

[0052] Figure 3 for Figure 1 Enlarged structural diagram at B in the middle.

[0053] Figure 4 Schematic diagram of the front view of the screw assembly mechanism in the embodiment.

[0054] Figure 5 for Figure 4 Schematic diagram of the structure at the CC section.

[0055] Figure 6 for Figure 4 Schematic diagram of the structure of the DD section.

[0056] Figure 7 Schematic diagram of the top view of the screw assembly mechanism in the embodiment.

[0057] Figure 8 for Figure 7 Enlarged structural diagram at E in the middle.

[0058] Fig. 9 for Figure 8 Schematic diagram of the structure of the FF section.

[0059] Fig.10 for Fig. 9 Enlarged structural diagram at G in the middle.

[0060] Fig.11 It is a schematic diagram of the three-dimensional structure of the screw rod assembly mechanism in the embodiment when in use.

[0061] Fig.12 It is a front view structural schematic diagram of the screw rod assembly mechanism in the embodiment when in use.

[0062] In the figure: 1. frame; 11. strip hole; 21. placement seat; 211. positioning column; 22. sliding shaft; 23. clamping claw; 231. notch; 24. clamping electric cylinder; 25. in-position detection sensor; 3. horizontal slide rail; 41. base; 42. vertical lifting guide assembly; 43. lifting electric cylinder; 44. fixed seat; 441. accommodating groove; 442. supporting rod; 443. arc groove; 51. drag plate; 52. pulley; 53. pull rope; 54. weight plate; 61. reset electric cylinder; 62. reset plate; 71. displacement sensor; 72. connecting plate; 81. driving sliding assembly; 82. driving electric cylinder; 83. driving motor; 84. torsion bar; 85. spring; 10. screw rod; 20. slide rail frame. DETAILED DESCRIPTION

[0063] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0064] Example:

[0065] like Figures 1 to 10 As shown, a screw assembly mechanism comprises:

[0066] Rack 1;

[0067] The slide rail frame clamping and fixing unit is arranged on the frame 1;

[0068] A horizontal slide rail 3 is arranged on the frame 1, and the sliding direction is parallel to the axis of the clamping unit of the slide rail frame;

[0069] The screw rod member 10 fixing unit is arranged on the horizontal slide rail 3 and is directly opposite to the slide rail frame clamping fixing unit;

[0070] A fixed force horizontal driving unit is arranged on the frame 1 and connected to the fixing unit of the screw rod 10;

[0071] The reset unit is arranged on the lower surface of the frame 1, and the telescopic end is opposed to the moving direction of the screw rod 10 when the fixing unit is assembled;

[0072] The assembly amount detection unit is arranged on the frame 1, and the detection part is connected to the fixing unit of the screw rod 10;

[0073] The torque driving unit is arranged on the frame 1, located on one side of the slide rail frame clamping and fixing unit, facing the gear box in the slide rail frame 20, and can be inserted into the gear box in the slide rail frame 20 to control the rotation of the gears inside the gear box.

[0074] In this embodiment, the slide rail frame clamping and fixing unit includes:

[0075] The placement seat 21 is fixed on the frame 1, and at least two positioning columns 211 are provided on the upper surface;

[0076] At least two sliding shafts 22 are arranged in parallel and spaced apart in the placement seat 21, with both ends exposed;

[0077] Two clamping claws 23 are respectively arranged on both sides of the placement seat 21 and connected to the exposed ends of the two sliding shafts 22;

[0078] The clamping electric cylinder 24 is installed on one clamping claw 23 , and the telescopic end passes through the placement seat 21 and is connected to the other clamping claw 23 ; the axis of the clamping electric cylinder 24 is parallel to the sliding shaft 22 .

[0079] By contracting the clamping electric cylinder 24 , the two clamping claws 23 are forced to approach the placement seat 21 , so that the clamping claws 23 clamp and fix the slide rail frame 20 .

[0080] In this embodiment, the clamping claw 23 is provided with a notch 231, and the notch 231 is opposite to the clamped slide rail frame 20; the clamping electric cylinder 24 is provided with an in-place detection sensor 25 (a magnetic sensor is used, and a change in the magnetic field can be used to determine that an object is placed), which is opposite to the notch 231 of the adjacent clamping claw 23; the output end of the torque drive unit passes through the notch 231 of the clamping claw 23 and is opposite to the gear box in the slide rail frame 20.

[0081] In this embodiment, the frame 1 is provided with a strip hole 11 that moves along the fixing unit of the screw rod 10;

[0082] The screw rod 10 fixing unit comprises:

[0083] The base 41 is slidably connected to the horizontal slide rail 3; the fixed force horizontal driving unit and the assembly amount detection unit are both connected to the base 41; the telescopic end of the reset unit is offset from the movement direction when assembled with the base 41;

[0084] A vertical lifting guide assembly 42 is vertically arranged on the base 41;

[0085] The lifting electric cylinder 43 is vertically upwardly arranged on the lower surface of the base 41 and connected to the telescopic end of the vertical lifting guide assembly 42;

[0086] The fixing seat 44 is disposed on the telescopic end of the vertical lifting guide assembly 42 ; the fixing seat 44 is provided with a receiving groove 441 for embedding the wire rod 10 .

[0087] The vertical lifting guide assembly 42 adopts a card-embedded slide groove matching method to achieve guided sliding, and the lifting electric cylinder 43 can fix the height of the seat 44, so that the device can be used for assembly without the screw rod 10.

[0088] In this embodiment, the fixing seat 44 is provided with a receiving groove 441, and the receiving groove 441 is in contact with the surface of the screw rod 10; the fixing seat 44 is provided with an outwardly projecting support rod 442, and the upper surface of the support rod 442 is provided with an arc groove 443 matching the surface of the screw rod.

[0089] The support rod 442 can better control the downward bending deformation of the lead screw.

[0090] In this embodiment, the constant force horizontal driving unit includes:

[0091] A carriage 51 connected to the base 41;

[0092] A pulley 52 is provided on the frame 1;

[0093] A pull rope 53, one end of which is connected to the support plate and the other end of which is passed around the pulley 52;

[0094] The weight plate 54 is connected to the other end of the stretcher. Under the gravity of the weight plate 54, the slide plate drags the base 41 to move along the horizontal slide rail 3 toward the direction of the slide rail frame clamping and fixing unit.

[0095] The movement of the pallet is driven by the gravity of the weight plate 54, and the force applied to the fixing base 44 connected to the pallet is fixed, so that the extrusion force applied to the end of the screw rod is fixed. Compared with the drive by an electric cylinder or other equipment, the screw rod can naturally resist the gravity of the weight plate 54 and stop when it collides with other objects without being forced to move and causing damage.

[0096] In this embodiment, the reset unit includes:

[0097] The reset electric cylinder 61 is arranged on the lower surface of the frame 1, and its movement direction is parallel to the axis of the horizontal slide rail 3;

[0098] The reset plate 62 is connected to the moving end of the reset electric cylinder 61 and abuts against the surface of the support plate facing the slide rail frame clamping and fixing unit.

[0099] After the weight plate 54 has finished descending and driven the screw rod to move, the support plate is reset by the reverse sliding of the reset plate 62 .

[0100] In this embodiment, the assembly amount detection unit includes:

[0101] The displacement sensor 71 is arranged on the frame 1 parallel to the axis direction of the horizontal slide rail 3;

[0102] The connecting plate 72 has one end connected to the base 41 and the other end connected to the moving end of the displacement sensor 71 .

[0103] In this embodiment, the torque drive unit includes:

[0104] A driving sliding assembly 81 is arranged on the frame 1, and the sliding direction is perpendicular to the horizontal slide rail 3;

[0105] A driving electric cylinder 82 is provided on the frame 1 to control the movement of the driving sliding assembly 81;

[0106] A driving motor 83 is provided on the sliding end of the driving sliding assembly 81;

[0107] The torsion bar 84 is connected to the rotating shaft of the driving motor 83 and faces the gear box in the slide rail frame 20 clamped by the slide rail frame clamping and fixing unit.

[0108] The torsion bar 84 is inserted into and withdrawn from the gear box in the slide rail frame 20 by driving the electric cylinder 82 , and the gear box is driven to rotate by the rotation of the driving motor 83 , so that the screw rod can smoothly enter the gear box.

[0109] In this embodiment, the driving motor 83 is slidably connected to the sliding end of the driving sliding assembly 81 through a guide shaft (not shown in the figure); a spring 85 is disposed on the outer sleeve of the guide shaft, one end of the spring 85 is against the driving motor 83, and the other end is against the sliding end of the driving sliding assembly 81.

[0110] In order to prevent the driving electric cylinder 82 from still working when the gear box in the slide rail frame 20 is not aligned with the torsion bar 84, causing the torsion bar 84 to be damaged, the spring 85 is provided to provide a margin for the force deformation of the torsion bar 84.

[0111] The screw rod assembly mechanism of this embodiment is used as follows: Fig.11 , 12 As shown, the slide rail frame 20 is placed in the placement seat 21 so that the positioning column 211 is aligned with the slide rail frame 20, and then the clamping electric cylinder 24 is controlled to work to clamp and fix the slide rail frame 20, and then the screw rod 10 is placed in the fixing seat 44.

[0112] The driving electric cylinder 82 is started to insert the torsion bar 84 into the gear box of the slide rail frame 20 , and the lifting electric cylinder 43 is adjusted to make the end of the screw rod face the screw-in hole of the gear box of the slide rail frame 20 .

[0113] At this time, the driving motor 83 is started to rotate, driving the gear box to rotate, and then controlling the reset electric cylinder 61 to move, so that the reset plate 62 no longer restricts the movement of the carriage 51.

[0114] The carriage 51 moves toward the gear box under the action of the weight plate 54, so that the end of the screw rod is inserted into the gear box. As the gear in the gear box rotates, the screw rod can be inserted horizontally without rotating itself. At the same time, the movement of the base 41 drives the connecting plate 72 to move, and the displacement information is transmitted to the displacement sensor 71, thereby recording the screw rod screwing depth.

[0115] When the screw rod is assembled in place, the reset plate 62 abuts against the carriage 51. At this time, the clamping cylinder is controlled to extend to take out the assembled slide rail frame 20, and then the reset electric cylinder 61 is controlled to reset, driving the carriage to reset, and the displacement sensor 71 is also reset, so as to be ready for reassembly.

[0116] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model rather than to limit it. Although the utility model has been described in detail with reference to the preferred embodiments, ordinary technicians in the field should understand that the technical solution of the utility model can be modified or replaced by equivalents without departing from the purpose and scope of the technical solution, which should be included in the scope of the claims of the utility model.

Claims

1. A screw assembly mechanism, characterized in that: include: frame; The slide rail frame clamps the fixing unit and is arranged on the frame; A horizontal slide rail is arranged on the frame, and the sliding direction is parallel to the axis of the clamping and fixing unit of the slide rail frame; The screw rod fixing unit is arranged on the horizontal slide rail and is directly opposite to the slide rail frame clamping fixing unit; A fixed force horizontal driving unit is arranged on the frame and connected to the screw rod fixing unit; The reset unit is arranged on the lower surface of the frame, and the telescopic end is opposed to the moving direction of the screw rod fixing unit when assembled; An assembly amount detection unit is arranged on the frame, and a detection part is connected to the screw rod fixing unit; The torque drive unit is arranged on the frame, located on one side of the slide rail frame clamping and fixing unit, facing the gear box in the slide rail frame, and can be inserted into the gear box in the slide rail frame to control the rotation of the gears inside the gear box.

2. The screw assembly mechanism according to claim 1, characterized in that: The slide rail frame clamping and fixing unit comprises: A placement seat is fixed on the frame, and at least two positioning columns are provided on the upper surface; At least two sliding shafts are arranged in parallel and spaced apart in the placement seat, with both ends exposed; Two clamping claws are respectively arranged on both sides of the placement seat and connected to the exposed ends of the two sliding shafts; The clamping electric cylinder is installed on a clamping claw, and the telescopic end passes through the placement seat and is connected with the other clamping claw; the axis of the clamping electric cylinder is parallel to the sliding shaft.

3. The screw assembly mechanism according to claim 2, characterized in that: The clamping claw is provided with a notch, which faces the clamping slide rail frame; the clamping electric cylinder is provided with an in-position detection sensor, which faces the notch of the adjacent clamping claw; the output end of the torque drive unit passes through the notch of the clamping claw and faces the gear box in the slide rail frame.

4. The screw assembly mechanism according to claim 1, characterized in that: The frame is provided with a strip-shaped hole that moves along the screw rod fixing unit; The screw rod fixing unit comprises: The base is slidably connected to the horizontal slide rail; the fixed force horizontal driving unit and the assembly amount detection unit are both connected to the base; the telescopic end of the reset unit is offset from the movement direction when assembled with the base; A vertical lifting guide assembly is vertically arranged on the base; The lifting electric cylinder is vertically upwardly arranged on the lower surface of the base and connected to the telescopic end of the vertical lifting guide assembly; The fixing seat is arranged on the telescopic end of the vertical lifting guide assembly; the fixing seat is provided with a receiving groove for embedding the wire rod.

5. The screw assembly mechanism according to claim 4, characterized in that: The fixing seat is provided with a receiving groove, and the receiving groove is in contact with the surface of the screw rod; the fixing seat is provided with an outwardly projecting supporting rod, and the upper surface of the supporting rod is provided with an arc groove matching the surface of the screw rod.

6. The screw assembly mechanism according to claim 4, characterized in that: The constant force horizontal driving unit comprises: A drag plate connected to the base; A pulley is arranged on the frame; A pull rope, one end of which is connected to the pallet and the other end is passed around the pulley; The weight plate is connected to the other end of the stretcher. Under the gravity of the weight plate, the slide plate drags the base along the horizontal slide rail to move in the direction of the slide rail frame clamping and fixing unit.

7. The screw assembly mechanism according to claim 6, characterized in that: The reset unit comprises: The reset electric cylinder is arranged on the lower surface of the frame, and the movement direction is parallel to the axis of the horizontal slide rail; The reset plate is connected with the moving end of the reset electric cylinder and abuts against the surface of the support plate facing the slide rail frame clamping and fixing unit.

8. The screw assembly mechanism according to claim 6, characterized in that: The assembly quantity detection unit comprises: The displacement sensor is arranged on the frame parallel to the axis direction of the horizontal slide rail; A connecting plate has one end connected to the base and the other end connected to the moving end of the displacement sensor.

9. The screw assembly mechanism according to claim 1, characterized in that: The torque drive unit comprises: A driving sliding assembly is arranged on the frame, and the sliding direction is perpendicular to the horizontal slide rail; A driving electric cylinder is arranged on the frame and controls the movement of the driving sliding assembly; A driving motor is arranged on the sliding end of the driving sliding assembly; The torsion bar is connected with the rotating shaft of the driving motor and faces the gear box in the slide rail frame clamped by the slide rail frame clamping fixing unit.

10. The screw assembly mechanism according to claim 9, characterized in that: The driving motor is slidably connected to the sliding end of the driving sliding assembly via a guide shaft; a spring is disposed on the outer sleeve of the guiding shaft, one end of the spring abuts against the driving motor, and the other end abuts against the sliding end of the driving sliding assembly.

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