Portable boring device

Abstract

The utility model relates to a portable boring device which is characterized in that a supporting part, a speed reducing part and a feeding part are connected into a whole through a fastening sleeve, a driving shaft sleeve, a connecting sleeve and a transmission screw rod are arranged on a feeding box body, a boring rod is connected with the transmission screw rod through a nut, and the driving shaft sleeve is connected with the transmission screw rod through a feeding transmission mechanism. The feeding transmission mechanism comprises a transmission shaft, a cam transmission mechanism and a gear transmission mechanism, a transmission shaft and cam transmission mechanism gear locking mechanism is designed, when the transmission shaft and the cam transmission mechanism are locked, the cam transmission mechanism is matched through a one-way bearing, and when the driving shaft sleeve rotates, the cam transmission mechanism drives the transmission shaft to rotate in one direction. The transmission shaft rotates to drive the transmission lead screw to rotate through the gear transmission mechanism, when the transmission shaft and the cam transmission mechanism are unlocked, the transmission shaft can rotate reversely, the transmission lead screw does not generate displacement during rotation, the speed reduction part and the feeding part are integrally designed, the operation distance is short, one operator can operate, and manpower is saved.

Description

Technical Field

[0001] The utility model relates to the technical field of boring equipment, in particular to a portable boring device. Background Art

[0002] The reduction mechanism and feed mechanism of portable small boring equipment are usually separated. The reduction mechanism is used to provide the boring bar with rotation to drive the boring cutter to rotate, and the feed mechanism is used to provide the lead screw to drive the boring bar to axially feed, so as to realize the feeding process of the boring cutter. These two power sources are usually separated, and the feed end usually adopts manual feeding. If servo motor control is adopted, on the one hand, boring is a continuous processing process, which causes the servo motor to overheat and easily fail. On the other hand, the servo system is too expensive, so the cost performance is extremely low and it is rarely used on site. If a reduction mechanism is used to provide both the boring bar rotation power and the lead screw feeding power, it will save the labor of the feed end.

[0003] At present, the structural method adopted in this way is to connect the boring bar and the nut on the lead screw through a transmission structure, so that the boring bar rotates to drive the nut to rotate, so that the lead screw generates an axial force, and the purpose of the lead screw providing feed to the boring bar is achieved. The disadvantage of this structure is that the lead screw is displaced, that is, the operating end of the reducer and the operating end of the feed must be designed separately, and there is a certain distance between the two. This distance must be greater than or equal to the stroke of the lead screw, otherwise the distance required for the processing hole depth cannot be reached. Such a structure requires two people to coordinate the operation on site, one is the processing control personnel (tool setting operation), and the other is the feed control personnel. The processing control personnel is at the processing end (i.e. the reducer operating end), and the feed control personnel is at the lead screw at the feed operating end. When the processing process requires tool setting operation, since the equipment is not allowed to stop during boring, it is necessary to retract the tool before stopping. If the machining control personnel finds that there is an error in the tool setting during the boring process, the feed control personnel will provide the screw with a reverse rotation force by shaking the hand, so that the tool will be retracted first. The machining control personnel will immediately shut down the equipment and re-set the tool to minimize the time difference and avoid the wrong boring size and excessive processing, which will cause irreversible effects. If the distance between the machining end and the feed control end is shortened as much as possible, only one operator can be retained at the machining end. Utility Model Content

[0004] In view of the above problems, the utility model proposes a portable boring device, which integrates the reduction mechanism and the screw feed mechanism into one, greatly shortening the distance between the reduction mechanism and the screw feed operating end, thereby achieving the time difference between retracting the tool and stopping. One operator can complete the operation, reducing the operating manpower.

[0005] To achieve the above purpose, the following technical scheme is adopted: a portable boring device, comprising a boring bar, a supporting part, a reduction part and a feeding part, the supporting part is used to be connected to an external frame, the reduction part is connected to an external power source to provide rotational power to the boring bar, the feeding part comprises a feeding box body, a driving sleeve for the boring bar to pass through, a connecting sleeve connected to the reduction box body and a transmission screw are arranged on the feeding box body, the driving sleeve is coaxially arranged and connected with the connecting sleeve, the transmission screw is arranged in parallel with the boring bar passing through the driving sleeve, and its transmission connection end is located inside the feeding box body, the feeding part is connected to the fastening sleeve on the reduction box body through the connecting sleeve on the feeding box body, the supporting sleeve of the supporting part is connected to the reduction box body of the reduction part through the fastening sleeve as a whole, the boring bar is installed on the supporting part, the reduction part and the feeding part, the shaft end of the transmission screw away from the transmission connection end is connected to the boring bar through a nut, the driving sleeve is connected to the transmission connection end of the transmission screw through a feeding transmission mechanism,

[0006] The feed transmission mechanism includes a transmission shaft, a cam transmission mechanism and a gear transmission mechanism. The transmission shaft is installed on the feed box body and the two shaft ends are located outside the feed box body. The transmission shaft is designed to be axially movable, and a handwheel is installed on one of the shaft ends.

[0007] The drive shaft sleeve is connected to the transmission shaft through a cam transmission mechanism. A one-way bearing is installed on the transmission shaft. The cam transmission mechanism cooperates with the one-way bearing. When the drive shaft sleeve rotates, the cam transmission mechanism drives the transmission shaft to rotate in one direction.

[0008] There are shift pins at the two shaft ends outside the feed box body, and a locking structure is set on the transmission shaft. When the shift pin moves to a locked state with the locking structure, the transmission shaft rotates unidirectionally with the drive shaft sleeve. When the shift pin is not locked with the locking structure, the transmission shaft rotates in the direction of the hand wheel by rotating the hand wheel.

[0009] The transmission shaft is connected to the transmission screw through a gear transmission mechanism. When the transmission shaft rotates, the transmission screw is driven to rotate through the gear transmission mechanism.

[0010] Furthermore, the gear transmission mechanism includes a group of driving bevel gears and a driven bevel gear, the driving bevel gears are all installed on the transmission shaft, the transmission shaft and the driving bevel gears are connected by a sliding key structure, the driven bevel gears are installed on the transmission connection end of the transmission screw, the driving bevel gears are meshed with the driven bevel gears, and a positioning sleeve is provided between the driving bevel gears, and the positioning sleeve is installed on the transmission shaft.

[0011] Furthermore, the transmission shaft is installed on the box wall of the feed box through a locking sleeve. The end face of the locking sleeve is provided with a locking gear hole. The locking gear hole corresponds to and fits with the gear pin to form a locking structure that cooperates with the gear pin. The end of the locking sleeve is pressed against the driving bevel gear.

[0012] Furthermore, the cam transmission mechanism includes a group of transmission forks and a camshaft, the transmission forks are respectively installed on the locking sleeves through one-way bearings, the camshaft is installed on the driving shaft sleeve, the end face of the camshaft is a sine and cosine wave undulating surface, and the transmission connecting end of the transmission fork is connected to the end face of the camshaft through an instrument bearing, so that when the camshaft rotates, the instrument bearing rolls on the undulating end face of the camshaft, thereby driving the transmission fork to swing.

[0013] Furthermore, the end of the transmission fork away from the transmission connection end is a return connection end, and an elastic return mechanism is correspondingly arranged at the return connection end. The elastic return mechanism is installed on the feed box and is located on the same side of the camshaft end face to ensure that when the transmission connection end of the transmission fork is lifted up and swung by the camshaft, the return connection end acts on the elastic return mechanism.

[0014] Furthermore, a limiting bolt is correspondingly provided at the return connection end of the transmission fork. The limiting bolt is mounted on the feed box and is located on the opposite side of the elastic return mechanism for adjusting the swing distance of the transmission fork.

[0015] Furthermore, the driving sleeve and the transmission screw are both mounted on the feed box through deep groove bearings.

[0016] The beneficial effects of the utility model are as follows: the utility model connects the boring bar and the transmission screw through a cam transmission mechanism, utilizes the power of the reduction mechanism to drive the transmission screw to rotate, thereby achieving the purpose of screw feeding, and controls the unlocking between the cam transmission mechanism and the screw through the gear locking mechanism, thereby realizing manual end retraction. This structure does not produce displacement of the transmission screw, realizes the integrated design of the reduction mechanism and the feeding operation end, and can be operated by one operator, saving manpower. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the utility model;

[0018] Figure 2 It is a top view of the utility model;

[0019] Figure 3 It is a left view of the utility model;

[0020] Figure 4 for Figure 2 AA direction schematic diagram;

[0021] Figure 5 for Figure 1 Schematic diagram of the middle BB direction;

[0022] Figure 6 for Figure 4 Schematic diagram of the middle C direction;

[0023] Figure 7 for Figure 3Schematic diagram of the DD direction.

[0024] As shown in the figure: 1. Boring bar; 2. Support part; 3. Speed ​​reduction part; 4. Feed part; 5. External frame; 6. Fastening sleeve; 7. Driving shaft sleeve; 8. Transmission screw; 9. Nut; 10. Transmission shaft; 11. Handwheel; 12. Active bevel gear; 13. Driven bevel gear; 14. Positioning sleeve; 15. Shift pin; 16. Locking sleeve; 17. Locking shift hole; 18. Transmission fork; 19. Camshaft; 20. One-way bearing; 21. Instrument bearing; 22. Elastic return mechanism; 23. Limit bolt; 200. Support shaft sleeve; 300. Speed ​​reduction housing; 400. Feed housing; 401. Connecting sleeve. DETAILED DESCRIPTION

[0025] Example 1

[0026] The following is further described with reference to the accompanying drawings. Figure 1-7 A portable boring device is shown, comprising a boring bar 1, a support part 2, a reduction part 3 and a feed part 4, wherein the support part 2 is used to be connected to an external frame 5, the reduction part 3 adopts a worm gear transmission structure, and provides rotational power to the boring bar 1 through an external power source, and the feed part 4 comprises a feed box 400, and a connecting sleeve 401 connected to the reduction box 300 is provided on the feed box 400, and the connecting sleeve 401 on the feed box 400 is connected to the fastening sleeve 6 on the reduction box 300 as a whole, and the support shaft sleeve 200 of the support part 2 is connected to the reduction box 300 of the reduction part 3 through the fastening sleeve 6 as a whole, and the boring bar 1 is installed on the support part 2, the reduction part 3 and the feed part 4,

[0027] According to the design of the feed box 400, a drive sleeve 7 and a transmission screw 8 for the boring bar 1 to pass through are arranged on the feed box 400. The drive sleeve 7 and the transmission screw 8 are both installed on the feed box 400 through deep groove bearings. The drive sleeve 7 is coaxially arranged and connected with the connecting sleeve 401. The transmission screw 8 is arranged in parallel with the boring bar 1 passing through the drive sleeve 7, and its transmission connection end is located inside the feed box 400. The shaft end of the transmission screw 8 away from the transmission connection end is connected to the boring bar 1 through a nut 9. The drive sleeve 7 is connected to the transmission connection end of the transmission screw 8 through a feed transmission mechanism, wherein the feed transmission mechanism includes a transmission shaft 10, a cam transmission mechanism and a gear transmission mechanism. The transmission shaft 10 is installed on the feed box 400 and the two shaft ends are located outside the feed box 400. A handwheel 11 is installed on the shaft end, wherein,

[0028] The transmission shaft 10 is connected to the transmission screw 8 through a gear transmission mechanism. The gear transmission mechanism includes a group of driving bevel gears 12 and a driven bevel gear 13. The driving bevel gears 12 are all installed on the transmission shaft 10. The transmission shaft 10 and the driving bevel gears 12 are connected by a sliding key structure, so that the transmission shaft 10 can achieve axial movement. The driven bevel gears 13 are installed at the transmission connection end of the transmission screw 8. The driving bevel gears 12 are meshed with the driven bevel gears 13. A positioning sleeve 14 is provided between the driving bevel gears 12. The positioning sleeve 14 is installed on the transmission shaft 10. When the transmission shaft 10 rotates, the transmission screw 8 is driven to rotate through the gear transmission mechanism.

[0029] The two shaft ends of the transmission shaft 10 outside the feed box 400 are provided with gear pins 15, and a locking structure is provided on the transmission shaft 10. The specific structure is that the transmission shaft 10 is installed on the box wall of the feed box 400 through a locking sleeve 16, and the end face of the locking sleeve 16 is provided with a locking gear hole 17, and the locking gear hole 17 corresponds to and fits with the gear pin 15 to form a locking structure matched with the gear pin 15, and the end of the locking sleeve 16 is pressed against the active bevel gear 12.

[0030] The driving sleeve 7 is connected to the transmission shaft 10 through a cam transmission mechanism, which includes a group of transmission forks 18 and a camshaft 19. The transmission fork 18 is installed on the locking sleeve 16 through a one-way bearing 20, and the camshaft 19 is installed on the driving sleeve 7. The end face of the camshaft 19 is a sine and cosine wave undulating surface. The transmission connection end of the transmission fork 18 is connected to the end face of the camshaft 19 through an instrument bearing 21. When the gear pin 15 is located in the locking gear hole 17, the camshaft 19 rotates, and the instrument bearing 21 rolls on the undulating end face of the camshaft 19, thereby driving the transmission fork 18 to swing; the transmission fork 18 is away from the transmission connection. One end of the connection is a return connection end, and an elastic return mechanism 22 is correspondingly arranged at the return connection end. The elastic return mechanism 22 is installed on the feed box 400 and is located on the same side of the end face of the camshaft 19, so as to ensure that when the transmission connection end of the transmission fork 18 is lifted up and swung by the camshaft 19, the return connection end acts on the elastic return mechanism 22. Under the condition of the rebound force provided by the elastic return mechanism 22, the transmission fork 18 swings back, so that when the boring bar 1 drives the driving sleeve 7 to rotate, the transmission fork 18 swings back and forth in the axial direction, and under the action of the one-way bearing 20, the transmission fork 18 drives the transmission shaft 10 to rotate in one direction, thereby providing an axial feed force.

[0031] In this embodiment, a limit bolt 23 for adjusting the swing distance of the transmission fork 18 is arranged on the wall of the feed box 400. The limit bolt 23 corresponds to the return connection end of the transmission fork 18 and is located on the opposite side of the elastic return mechanism. The swing amplitude of the transmission fork 18 is controlled by adjusting the distance between the transmission forks 18, thereby controlling the feed amount of the transmission screw 8.

[0032] During the boring operation, first pull the gear pin 15 on the transmission shaft 10 into the locking gear hole 17, so that the transmission shaft 10 and the locking sleeve 16 are fixedly connected to form a whole, and then start boring the operation hole. The speed reduction unit 3 provides rotational power for the boring rod 1. The boring rod 1 rotates and drives the drive sleeve 7 to rotate while boring. When the drive sleeve 7 rotates, the end of the transmission fork 18 swings back and forth along the axial direction under the action of the camshaft 19 and the elastic return mechanism 22, and under the constraint of the one-way bearing 20, the transmission The movable shaft 10 can only make unidirectional rotational motion, thereby applying an axial power to the boring bar 1 to achieve the purpose of feeding. When the tool needs to be aligned, the transmission shaft 10 is pulled to separate the gear pin 15 from the locking gear hole 17, thereby separating the transmission shaft 10 from the locking sleeve 16. The transmission shaft 10 is no longer constrained by the one-way bearing 20. The transmission screw 8 is reversed by shaking the handwheel 11 in the opposite direction, thereby achieving the purpose of retracting the tool. At this time, the power source of the speed reduction unit 3 can be turned off and the tool can be aligned again. Since the speed reduction unit 3 and the feeding unit 4 are integrated, one operator can complete two actions, avoiding a large time difference caused by a long operating distance.

[0033] The present invention is not limited to the present embodiment, and any equivalent concepts or changes within the technical scope disclosed in the present invention are included in the protection scope of the present invention.

Claims

1. A portable boring device, comprising a boring bar (1), a support part (2), a speed reduction part (3) and a feeding part (4), wherein the support part (2) is used to be connected to an external frame (5), and the speed reduction part (3) is connected to an external power source to provide rotational power to the boring bar (1), characterized in that: The feed part (4) comprises a feed box (400), on which a drive sleeve (7) for the boring bar (1) to pass through, a connecting sleeve (401) connected to the reduction box (300), and a transmission screw (8) are arranged. The drive sleeve (7) and the connecting sleeve (401) are coaxially arranged and connected. The transmission screw (8) is arranged parallel to the boring bar (1) passing through the drive sleeve (7), and its transmission connection end is located inside the feed box (400). The feed part (4) is connected to the feed box (400) by the connecting sleeve (401) on the reduction box (300). The connecting sleeve (401) is integrally connected with the fastening sleeve (6) on the reduction box body (300); the supporting sleeve (200) of the supporting part (2) and the reduction box body (300) of the reduction part (3) are integrally connected via the fastening sleeve (6); the boring bar (1) is mounted on the supporting part (2), the reduction part (3) and the feeding part (4); the shaft end of the transmission screw (8) away from the transmission connection end is connected to the boring bar (1) via a nut (9); the driving sleeve (7) and the transmission connection end of the transmission screw (8) are connected via a feeding transmission mechanism; The feed transmission mechanism comprises a transmission shaft (10), a cam transmission mechanism and a gear transmission mechanism. The transmission shaft (10) is mounted on a feed box (400) and two shaft ends are located outside the feed box (400). The transmission shaft (10) is designed to be axially movable, and a hand wheel (11) is mounted on one of the shaft ends. The drive shaft sleeve (7) is connected to the transmission shaft (10) through a cam transmission mechanism. A one-way bearing (20) is installed on the transmission shaft (10). The cam transmission mechanism cooperates with the one-way bearing (20). When the drive shaft sleeve (7) rotates, the cam transmission mechanism drives the transmission shaft (10) to rotate in one direction. The transmission shaft (10) is provided with a gear pin (15) at two shaft ends located outside the feed box (400), and a locking structure is provided on the transmission shaft (10). When the gear pin (15) moves to a locked state with the locking structure, the transmission shaft (10) rotates in one direction along with the drive shaft sleeve (7). When the gear pin (15) is not locked with the locking structure, the transmission shaft (10) rotates along with the rotation direction of the hand wheel (11) by rotating the hand wheel (11). The transmission shaft (10) is connected to the transmission screw (8) via a gear transmission mechanism, and when the transmission shaft (10) rotates, the transmission screw (8) is driven to rotate via the gear transmission mechanism.

2. The portable boring device according to claim 1, characterized in that: The gear transmission mechanism comprises a group of driving bevel gears (12) and a driven bevel gear (13), the driving bevel gears (12) are all mounted on a transmission shaft (10), the transmission shaft (10) and the driving bevel gears (12) are connected via a sliding key structure, the driven bevel gears (13) are mounted on the transmission connection end of a transmission screw (8), the driving bevel gears (12) are meshed with the driven bevel gears (13), a positioning sleeve (14) is provided between the driving bevel gears (12), and the positioning sleeve (14) is mounted on the transmission shaft (10).

3. The portable boring device according to claim 2, characterized in that: The transmission shaft (10) is mounted on the housing wall of the feed housing (400) through a locking sleeve (16); a locking gear hole (17) is provided on the end surface of the locking sleeve (16); the locking gear hole (17) corresponds to and fits with the gear pin (15) to form a locking structure that cooperates with the gear pin (15); and the end of the locking sleeve (16) is pressed against the driving bevel gear (12).

4. The portable boring device according to claim 3, characterized in that: The cam transmission mechanism comprises a group of transmission forks (18) and a camshaft (19). The transmission forks (18) are respectively mounted on the locking sleeves (16) through one-way bearings (20). The camshaft (19) is mounted on the driving shaft sleeve (7). The end surface of the camshaft (19) is a sine-cosine wave undulating surface. The transmission connection end of the transmission fork (18) is connected to the end surface of the camshaft (19) through an instrument bearing (21), so that when the camshaft (19) rotates, the instrument bearing (21) rolls on the undulating end surface of the camshaft (19), thereby driving the transmission fork (18) to swing.

5. The portable boring device according to claim 4, characterized in that: The end of the transmission fork (18) away from the transmission connection end is a return connection end, and an elastic return mechanism (22) is correspondingly arranged at the return connection end. The elastic return mechanism (22) is installed on the feed box (400) and is located on the same side as the end face of the camshaft (19), so as to ensure that when the transmission connection end of the transmission fork (18) is lifted up by the camshaft (19) and swings, the return connection end acts on the elastic return mechanism (22).

6. The portable boring device according to claim 5, characterized in that: A limiting bolt (23) is also provided corresponding to the return connection end of the transmission fork (18); the limiting bolt (23) is mounted on the feed box (400) and is located on the opposite side of the elastic return mechanism (22) for adjusting the swing distance of the transmission fork (18).

7. A portable boring device according to any one of claims 1 to 6, characterized in that: The driving shaft sleeve (7) and the transmission screw (8) are both mounted on the feed box (400) via deep groove bearings.

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