Automatic feeding device

Abstract

The invention discloses an automatic feeding device, including a transmission mechanism, a gear set, a main motor, a reduction box, a stepper motor and a main box body, wherein an in-position sensor, a lead screw, a nut, a transition block, a spline sleeve, a spline shaft and a spline sleeve are arranged in the main box body; the stepper motor is used to drive the transmission mechanism to drive the lead screw to rotate, the lead screw is used to convert the torque of the stepper motor into thrust through the nut, the nut is used to drive the spline sleeve to move, the spline sleeve is used to drive the spline shaft to move in the spline sleeve, the main motor is connected to the gear set through the reduction box, and the gear set is used to drive the spline sleeve to rotate; the in-position sensor is used to send the acquired position information of the nut to the main motor and the stepper motor at the same time. The purpose of the automatic feeding device is to solve the problem that the automatic rail drilling device is inconvenient to operate and carry and has high energy consumption due to its large size.

Description

Technical Field

[0001] The invention belongs to the technical field of railway rail drilling machines, and in particular relates to an automatic feeding device. Background Art

[0002] Rail drilling machine is a machine specially used for drilling holes in railway rails. When the gasoline engine of the rail drilling machine rotates at high speed, its torque is transmitted to the reduction box through the clutch. The drill bit is installed on the output shaft of the reduction box, making the drill bit rotate at a speed of 80-130r / min. At the same time, the operating handle of the vibration feed mechanism drives the drill bit to advance or retreat through the transmission system of worm gear, gear rack, and complete the rail drilling operation.

[0003] The automatic rail drilling adopts a motor to directly drive the main shaft for feeding or drives the entire transmission part to feed through a feed motor. The automatic drilling structure is large in size or weight and has high energy consumption.

[0004] In view of this, those skilled in the art are in urgent need of providing an automatic feeding device to solve the above problems. Summary of the invention

[0005] 1. Technical issues to be resolved

[0006] The technical problem to be solved by the present invention is that the automatic rail drilling device is inconvenient to operate and carry due to its large size and high energy consumption.

[0007] (II) Technical solution

[0008] The present invention provides an automatic feeding device, comprising a transmission mechanism, a gear set, a main motor, a reduction box, a stepping motor and a main box body, wherein the main box body is provided with an in-position sensor, a lead screw, a nut, a spline shaft sleeve, a spline shaft and a spline sleeve;

[0009] The stepper motor is used to drive the transmission mechanism to drive the lead screw to rotate, the lead screw is used to convert the torque of the stepper motor into thrust through the nut, the nut is used to drive the spline sleeve to move, the spline sleeve is used to drive the spline shaft to move in the spline sleeve, the main motor is connected to the gear set through the reduction box, and the gear set is used to drive the spline sleeve to rotate;

[0010] The in-position sensor is used to send the acquired position information of the nut to the main motor and the stepping motor at the same time.

[0011] Furthermore, it also includes a transition block, the spline shaft sleeve is provided with a slot, the transition block is provided with a protrusion matched with the slot; the transition block is fixedly connected to the nut.

[0012] Furthermore, the automatic feeding device also includes a buffer pad, which is arranged at an end of the nut away from the drill bit and abuts against the inner wall of the main box.

[0013] Furthermore, the number of the buffer pads is at least two.

[0014] Furthermore, the transmission mechanism includes a main synchronous pulley, a synchronous belt and a driven synchronous pulley, the main synchronous pulley drives the driven synchronous pulley through the synchronous belt, and the driven synchronous pulley is coaxially connected to the lead screw.

[0015] Furthermore, the gear set includes a pinion gear, a transition gear and a large gear that are meshed in sequence, and the large gear is connected to the spline sleeve.

[0016] Furthermore, the reduction gear box has a planetary gear structure inside, and the planetary gear structure is meshed with the pinion gear.

[0017] Furthermore, the spline sleeve is sleeved on the spline shaft, and a protrusion for contacting the spline shaft is provided on the inner wall of the spline sleeve.

[0018] Furthermore, there are two in-place sensors, which are respectively located at the main box body positions at both ends of the nut.

[0019] Furthermore, an installation opening for installing a drill bit is provided at one end of the spline shaft away from the gear set.

[0020] (III) Beneficial effects

[0021] The automatic feeding device of the present invention, when automatically drilling, firstly, the sensor is in place to detect the origin, the stepper motor starts to rotate, and ensures that the nut is at the starting position. At this time, the main motor is connected to the reduction box and starts to rotate at a low speed via the gear set. At this time, the stepper motor is connected to the synchronous pulley set to drive the lead screw and the nut to rotate. The nut is connected to the spline shaft sleeve, and the spline shaft sleeve can drive the spline shaft to move forward on the inner wall of the spline sleeve, thereby realizing the feeding of the drill bit. The coordination between the spline shaft, the spline shaft sleeve, the lead screw and the nut realizes a compact structure, light weight, and convenient operation. Since the lead screw only needs to drive the spline shaft forward and backward with a small load, the energy consumption is low. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments of the present invention are briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0023] Figure 1is a front view of an automatic feeding device provided by an embodiment of the present invention;

[0024] Figure 2 yes Figure 1 DD plane section view in;

[0025] Figure 3 It is a right side view of an automatic feeding device provided by an embodiment of the present invention;

[0026] Figure 4 It is an axonometric diagram of an automatic feeding device provided by an embodiment of the present invention.

[0027] In the figure:

[0028] 1-main synchronous pulley; 2-synchronous belt; 3-driven synchronous pulley; 4-small gear; 5-transition gear; 6-large gear; 7-main motor; 8-reduction gearbox; 9-stepping motor; 10-in-place sensor; 11-lead screw; 12-nut; 13-transition block; 14-spline shaft sleeve; 15-spline shaft; 16-spline sleeve; 17-buffer pad. DETAILED DESCRIPTION

[0029] The specific implementation of the present invention is further described in detail below in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0030] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0031] According to an embodiment of the present invention, an automatic feeding device is provided, such as Figure 1-4 As shown, it includes a transmission mechanism, a gear set, a main motor 7, a reduction box 8, a stepper motor 9 and a main box body, in which an in-position sensor 10, a lead screw 11, a nut 12, a spline sleeve 14, a spline shaft 15 and a spline sleeve 16 are arranged; the stepper motor 9 is used to drive the synchronous pulley group to drive the lead screw 11 to rotate, the lead screw 11 is used to convert the torque of the stepper motor 9 into thrust through the nut 12, the nut 12 is used to drive the spline sleeve 14 to move, the spline sleeve 14 is used to drive the spline shaft 15 to move in the spline sleeve 16, the main motor 7 is connected to the gear set through the reduction box 8, and the gear set is used to drive the spline sleeve 16 to rotate; the in-position sensor 10 is used to send the acquired position information of the nut 12 to the main motor 7 and the stepper motor 9 at the same time.

[0032] In the above embodiment, the working principle of the automatic feeding device is as follows: during automatic drilling, the sensor 10 is first placed in place to detect the origin, and the stepper motor 9 starts to rotate to ensure that the nut 12 is in the starting position. At this time, the main motor 7 is connected to the reduction box 8 and starts to rotate at a low speed via the gear group. At this time, the stepper motor 9 is connected to the synchronous pulley group to drive the lead screw 11 and the nut 12 to rotate, and the nut 12 drives the spline sleeve 14 to move. The spline sleeve 14 can drive the spline shaft 15 to move forward and rotate on the inner wall of the spline sleeve 16, thereby realizing the feeding of the drill bit.

[0033] The drill bit continues to move forward. When the drill bit contacts the track, the current increases through detection. At this time, the speed of the main motor 7 is immediately increased, and the feed speed of the stepper motor 9 is reduced to ensure stable drilling. The drill bit continues to move forward. When the in-place switch 10 at the other end detects that the nut 12 is in place, the stepper motor 9 quickly reverses to achieve a rapid return of the drill bit until the in-place switch 10 sends a signal again, the stepper motor 9 stops rotating, and the main motor 7 stops rotating. This is a working cycle.

[0034] As for how the nut 12 specifically drives the spline sleeve 14 to move, the nut 12 and the spline sleeve 14 can be connected by welding, clamping or connecting through a connecting piece, which is not specifically limited here.

[0035] The automatic feeding device realizes compact structure, light weight, convenient operation and one-touch drilling through the cooperation between the spline shaft, spline shaft sleeve, lead screw and nut. Since the lead screw only needs to drive the spline shaft forward and backward with a small load, the energy consumption is low.

[0036] In some optional embodiments, a transition block 13 is further included, a slot is provided on the spline sleeve 14, and a protrusion adapted to the slot is provided on the transition block 13; the transition block 13 is fixedly connected to the nut 12. A specific connection method between the spline sleeve 14 and the nut 12 is provided, which can realize that the nut 12 drives the spline sleeve 14 to rotate. By setting the transition block 13, secondary processing of the nut 12 can be avoided, saving costs.

[0037] In some optional embodiments, the automatic feeding device further includes a buffer pad 17 , which is disposed at one end of the nut 12 away from the drill bit and abuts against the inner wall of the main box body. The buffer pad 17 is used to achieve mechanical limiting of the nut 12 .

[0038] In some optional embodiments, the number of the buffer pads 17 is at least two. Specifically, the more the number of the buffer pads 17 is, the more conducive it is to the mechanical limitation of the nut 12.

[0039] In some optional embodiments, the transmission mechanism includes a main synchronous pulley 1, a synchronous belt 2 and a driven synchronous pulley 3, the main synchronous pulley 1 drives the driven synchronous pulley 3 through the synchronous belt 2, and the driven synchronous pulley 3 is coaxially connected to the screw 11.

[0040] Specifically, there is no limitation on the specific form of the transmission mechanism, which can be any one of a synchronous pulley set, a belt pulley or a gear set, as long as it can achieve force transmission. In order to simplify the overall structure of the device, a synchronous pulley set is preferably used, that is, the main synchronous pulley 1 drives the driven synchronous pulley 3 to rotate through the synchronous belt 2 to drive the screw 11 to rotate.

[0041] In some optional embodiments, the gear set includes a pinion 4 , a transition gear 5 , and a large gear 6 that are meshed in sequence, and the large gear 6 is connected to the spline sleeve 16 .

[0042] Specifically, there is no limitation on the specific form of the gear set. In order to simplify the overall structure of the device, a structure in which the pinion 4, the transition gear 5 and the large gear 6 are meshed with each other can be selected to drive the spline sleeve 16 to rotate. During this process, the spline sleeve 16 only rotates and does not move axially. Since the spline shaft 15 is much longer than the spline sleeve 16, it is ensured that the spline shaft 15 will not slip out of the spline sleeve 16 when it is fed forward.

[0043] In some optional embodiments, the reduction box 8 has a planetary gear structure inside, and the planetary gear structure meshes with the pinion 4. The meshing of the planetary gear structure with the pinion 4 can make the connection more stable, preventing the pinion 4 from detaching from the reduction box 8 during rotation, and the structure is relatively simple.

[0044] In some optional embodiments, the spline sleeve 14 is sleeved on the spline shaft 15, and a protrusion for contacting the spline shaft 15 is provided on the inner wall of the spline sleeve 14. The setting of the protrusion can avoid excessive contact between the spline sleeve 14 and the spline shaft 15, reduce the friction generated between the two during the rotation process, and improve the efficiency of the stepper motor 9.

[0045] In some optional embodiments, there are two in-position sensors 10, which are respectively located at the main box positions at both ends of the screw nut 12. The two in-position sensors 10 can accurately detect the forward and backward movement of the screw nut 12, thereby more accurately controlling the forward or backward movement of the drill bit.

[0046] In some optional embodiments, a mounting opening for mounting a drill bit is provided at one end of the spline shaft 15 away from the gear set, which can facilitate the installation of the drill bit and realize its automatic feeding.

[0047] It should be clear that the various embodiments in this specification are described in a progressive manner, and the same or similar parts between the various embodiments can be referred to each other, and each embodiment focuses on the differences from other embodiments. The present invention is not limited to the specific steps and structures described above and shown in the figures. In addition, for the sake of brevity, a detailed description of known methods and technologies is omitted here.

[0048] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. An automatic feeding device, characterized in that: It comprises a transmission mechanism, a gear set, a main motor (7), a reduction box (8), a stepping motor (9) and a main housing, wherein the main housing is provided with an in-position sensor (10), a lead screw (11), a nut (12), a transition block (13), a spline shaft sleeve (14), a spline shaft (15) and a spline sleeve (16); The stepper motor (9) is used to drive the transmission mechanism to drive the lead screw (11) to rotate; the lead screw (11) is used to convert the torque of the stepper motor (9) into thrust through the nut (12); the nut (12) is used to drive the spline sleeve (14) to move; the spline sleeve (14) is used to drive the spline shaft (15) to rotate and move in the spline sleeve (16); the main motor (7) is connected to the gear set through the reduction box (8); the gear set is used to drive the spline sleeve (16) to rotate; The in-position sensor (10) is used to simultaneously send the acquired position information of the nut (12) to the main motor (7) and the stepping motor (9); The spline shaft sleeve (14) is provided with a slot, and the transition block (13) is provided with a protrusion matched with the slot; the transition block (13) is fixedly connected to the nut (12); During automatic drilling, the in-position sensor (10) performs origin detection, and the stepper motor (9) starts to rotate to ensure that the nut (12) is at the starting position. At this time, the main motor (7) is connected to the reduction box (8) and starts to rotate at a low speed via the gear set. The stepper motor (9) is connected to the synchronous pulley set to drive the lead screw (11) and the nut (12) to rotate. The nut (12) drives the spline sleeve (14) to move, and the spline sleeve (14) drives the spline shaft (15) to move inside the spline sleeve (16). The drill bit continues to move forward, and when the drill bit contacts the track, the increase in current is detected, and the rotation speed of the main motor (7) is immediately increased, while the feed speed of the stepper motor (9) is reduced to ensure stable drilling. The drill bit continues to move forward, and when the in-place sensor (10) at the other end detects that the nut (12) is in place, the stepper motor (9) is quickly reversed to achieve rapid retraction of the drill bit, until the in-place sensor (10) sends a signal again, the stepper motor (9) stops rotating, and the main motor (7) stops rotating.

2. The automatic feeding device according to claim 1, characterized in that: It also includes a buffer pad (17), which is arranged at one end of the nut (12) away from the drill bit and abuts against the inner wall of the main box.

3. The automatic feeding device according to claim 2, characterized in that: The number of the buffer pads (17) is at least two.

4. The automatic feeding device according to claim 1, characterized in that: The transmission mechanism comprises a main synchronous pulley (1), a synchronous belt (2) and a driven synchronous pulley (3); the main synchronous pulley (1) drives the driven synchronous pulley (3) via the synchronous belt (2); and the driven synchronous pulley (3) is coaxially connected to the lead screw (11).

5. The automatic feeding device according to claim 1, characterized in that: The gear set comprises a pinion (4), a transition gear (5) and a large gear (6) which are meshed in sequence, and the large gear (6) is connected to the spline sleeve (16).

6. The automatic feeding device according to claim 5, characterized in that: The reduction box (8) has a planetary gear structure inside, and the planetary gear structure is meshed with the pinion (4).

7. The automatic feeding device according to claim 1, characterized in that: The spline shaft sleeve (14) is sleeved on the spline shaft (15), and a protrusion for contacting the spline shaft (15) is provided on the inner wall of the spline shaft sleeve (14).

8. The automatic feeding device according to claim 1, characterized in that: The number of the in-place sensors (10) is two, which are respectively located at the positions of the main box at both ends of the nut (12).

9. The automatic feeding device according to claim 1, characterized in that: An end of the spline shaft (15) away from the gear set is provided with a mounting opening for mounting a drill bit.

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