A bench drill depth adjustment and positioning mechanism

Abstract

The present invention belongs to the technical field of electric tools, and particularly refers to a bench drill depth adjustment and positioning mechanism, comprising a bench drill body and a depth adjustment mechanism arranged on one side of the bench drill body, the depth adjustment mechanism comprising a base fixed to one side of the bench drill body, a rotating shaft passing through the base, a rebound member arranged in the base, a driven slider connected to one end of the rebound member, an active slider abutting against one side of the driven slider, a slot is arranged on the active slider, the slot is engaged with a bayonet pin passing through one end of the rotating shaft, a sliding pressure plate is arranged on one side of the driven slider, a rotating locking sleeve is arranged on one side of the sliding pressure plate, the rotating locking sleeve can realize the pressing and releasing of the slider pressure plate on the driven slider, thereby realizing the locking and releasing of the cutting depth position. The purpose of the present invention is to provide a bench drill depth adjustment and positioning mechanism that can improve the adjustment accuracy of the drilling depth and is more convenient and quick to operate.

Description

Technical Field

[0001] The invention belongs to the technical field of electric tools, and in particular relates to a depth adjustment and positioning mechanism for a bench drill. Background Art

[0002] Desktop drilling machines have been widely used in many places such as industry and home to drill holes of various diameters and depths on a variety of materials.

[0003] The drilling machine usually includes an adjustment and positioning mechanism for controlling the depth of the drilled hole, which can realize batch repeated drilling of holes of the same depth.

[0004] There are two common adjustment and positioning mechanisms: one is fixed on the handle turntable, and the other is fixed on the spindle jacket of the drilling machine.

[0005] The former is to put a metal ring on the fixed plate of the drill press handle, screw the locking knob on the outer ring of the ring, there are positioning scale values ​​on the metal ring, and then lock it with the knob after positioning, and it rotates with the rotation of the handle.

[0006] The latter is to fix a set of parts on the main shaft sleeve of the drilling machine, which includes a movable part that can move up and down, and the movable block indicating block is locked with a tool during positioning. It moves up and down with the rise and fall of the drill bit.

[0007] Both of the above structures have obvious disadvantages: the former has a small operating space, the markings are small and difficult to identify, and it often requires two-handed operation, which is very inconvenient; the latter structure often requires the use of tools to achieve a larger locking force, and the moving distance of the movable block is consistent with the actual cutting depth distance. The scale cannot be enlarged and identified, which leads to a certain impact on the positioning accuracy when locking, and the scale is too small to be identified. Summary of the invention

[0008] The purpose of the present invention is to provide a bench drill depth adjustment and positioning mechanism which can improve the adjustment accuracy of the drilling depth and is more convenient and quick to operate.

[0009] The objective of the present invention is achieved as follows: a bench drill depth adjustment and positioning mechanism comprises a bench drill body and a depth adjustment mechanism arranged on one side of the bench drill body, the depth adjustment mechanism comprises a base fixed to one side of the bench drill body, a rotating shaft is passed through the base, a rebound member is provided in the base, a driven slider is connected to one end of the rebound member, an active slider is abutted against one side of the driven slider, a slot is provided on the active slider, the slot is engaged with a bayonet pin passed through one end of the rotating shaft, a sliding pressure plate is provided on one side of the driven slider, a rotating locking sleeve is provided on one side of the sliding pressure plate, the rotating locking sleeve can realize the tightening and release of the sliding pressure plate and the driven slider, thereby realizing the locking and release of the cutting depth position.

[0010] Preferably, at least two first protrusions are provided on the inner wall of the rotary locking sleeve, and the first protrusions cooperate with the second protrusions formed on the sliding pressure plate.

[0011] Preferably, there is a size difference between the driven slider and the active slider in the direction of being pressed, and the distance between the driven slider and the sliding pressure plate is smaller than the distance between the active slider and the sliding pressure plate.

[0012] Preferably, both sides of the first protrusion and the second protrusion are provided with inclined surfaces.

[0013] Preferably, at least one groove is provided on the outer side of the sliding pressure plate, and the groove is engaged with at least one boss provided on the inner wall of the base.

[0014] Preferably, an angle α is formed between the abutment point between the driven slider and the active slider and the diameter direction.

[0015] Preferably, a locking screw is inserted into the rotation locking sleeve, and the locking screw is threadedly connected to a threaded hole provided at one end of the rotating shaft.

[0016] Preferably, an elastic corrugated spring piece is provided between the rotary locking sleeve and the locking screw to obtain a rebound pre-tightening force on the rotary sleeve. Of course, the elastic element is not limited to a specific corrugated spring piece, and may be other types of parts with elasticity.

[0017] Preferably, a third annular groove for accommodating the resilient member and a fourth annular groove for accommodating the driven slider and the active slider are respectively provided in the base.

[0018] Preferably, a positioning hole for fixing the resilient member is provided at the bottom of the third annular groove, and the other end of the resilient member is engaged with a groove provided in the driven sliding block.

[0019] Preferably, an unlocking position and a locking position are respectively provided on the bench drill body, and an indicating device for indicating the unlocking position and the locking position is provided on the outer wall of the rotary locking sleeve.

[0020] Compared with the prior art, the present invention has the outstanding and beneficial technical effect that the bench drill depth positioning mechanism of the present invention can drive the sliding pressure plate to fix the driven sliding block by rotating the rotary locking sleeve, thereby enabling the user to adjust the drilling depth and facilitating quick operation by the user. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 An exploded diagram of the structure of the depth adjustment and positioning mechanism of the present invention;

[0022] Figure 2 Functional schematic diagram of the base of the present invention;

[0023] Figure 3 A schematic diagram of the structure of the active slider and the driven slider of the present invention;

[0024] Figure 4 A schematic structural diagram of a sliding pressure plate of the present invention;

[0025] Figure 5 A schematic structural diagram of a locking sleeve of the present invention;

[0026] Figure 6 A schematic diagram of a non-locking state of the driven slider of the present invention;

[0027] Figure 7 A schematic diagram of a locked state of the driven slider of the present invention;

[0028] Figure 8 A schematic diagram of the force applied to the active slider in a locked state on the driven slider after locking of the present invention;

[0029] Fig. 9 A schematic diagram of the position and status indication of the rotary locking sleeve in the unlocked state of the present invention;

[0030] Fig.10 Schematic diagram of the position and status indication of the rotating locking sleeve in the locked state of the present invention. DETAILED DESCRIPTION

[0031] The present invention is further described below with reference to specific embodiments.

[0032] like Figure 1-5 As shown: a bench drill depth adjustment and positioning mechanism, including a bench drill body 2 and a depth adjustment mechanism 1 arranged on one side of the bench drill body 2, the depth adjustment mechanism 1 includes a base 1-1 fixed on one side of the bench drill body 2, a rotating shaft 14 is passed through the base 1-1, a rebound member 1-4 is provided in the base 1-1, one end of the rebound member 1-4 is connected to a driven slider 1-3, one side of the driven slider 1-3 is abutted against an active slider 1-2, a slot 60 is provided on the active slider 1-2, the slot 60 is engaged with a bayonet 14-2 passed through one end of the rotating shaft 14, a sliding pressure plate 1-5 is provided on one side of the driven slider 1-3, a rotating locking sleeve 1-6 is provided on one side of the sliding pressure plate 1-5, and the rotating locking sleeve 1-6 can realize the pressing and releasing of the sliding pressure plate 1-5 and the driven slider 1-3, thereby realizing the locking and releasing of the cutting depth position.

[0033] The depth adjustment mechanism 1 is coaxial with the rotating shaft 14 and is installed at the other end corresponding to the operating handle.

[0034] The shaft head of the rotating shaft 14 is provided with a thread 14 - 1 , and a locking screw 1 - 8 can be installed on the thread 14 - 1 for locking the axial position of the rotating locking sleeve 1 - 6 on the rotating shaft 14 .

[0035] The shaft head of the rotating shaft 14 is provided with a bayonet pin 14 - 2 , which is placed in the slot 60 of the active slider 1 - 2 . The rotating shaft 14 drives the active slider 1 - 2 to rotate synchronously through the bayonet pin 14 - 2 on the shaft.

[0036] The slot 1-3-2 of the driven slider 1-3 is acted upon by a rebound part 1-4 and the return end 1-4-2 of the rebound part 1-4, so that the driven slider 1-3 always obtains a rebound force, ensuring that the driven slider 1-3 always keeps in contact with the active slider 1-2. The driven slider 1-3 is always acted upon by the rebound force of a rebound part 1-4-1, ensuring that the driven slider 1-3 always keeps in contact with the active slider 1-2. The rebound part 1-4 is not limited to the torsion spring 1-4-1 shown in the figure, and can be any form of elastic element.

[0037] The base 1-1 of the depth adjustment mechanism 1 on the bench drill body is coaxial with the rotating shaft 14, and the rotating shaft 14 passes through the axis of the base 1-1 of the depth adjustment mechanism 1. A third annular groove 66 coaxial with its axis is provided on the end surface of the base 1-1. The active slider 1-2 and the driven slider 1-3 are both arranged in the third annular groove 66 and can rotate in a circle around the axis of the base 1-1 along the third annular groove 66. There is a height difference between the active slider 1-2 and the driven slider 1-3 in the axial direction as shown in FIG. Figure 7 As shown by the arrow, the height of the driven slider 1-3 is usually greater than that of the active slider 1-2. A sliding pressure plate 1-5 that matches the shape of the annular groove is arranged on the upper part of the third annular groove 66, and a second protrusion 64 is arranged on the sliding pressure plate 1-5; a rotary locking sleeve 1-6 is arranged above the sliding pressure plate 1-5, and the rotary locking sleeve 1-6 can rotate in a circle around the axis of the base 1-1; a first protrusion 62 is arranged on the inner end face of the rotary locking sleeve 1-6, and the first protrusion 62 cooperates with the second protrusion 64 formed on the sliding pressure plate 1-5.

[0038] During operation, the latch or other forms of connection on the rotating shaft 14 drive the active slider 1-2 to make circular motion in the third annular groove 66 and the fourth annular groove 67. The active slider 1-2 simultaneously pushes the driven slider 1-3 in contact with it to make synchronous circular motion. When the operating handle drives the above-mentioned rotating shaft 14, the latch 14-2 on the rotating shaft 14 is inserted into the slot 60, so the rotating shaft 14 drives the active slider 1-2 to run synchronously. The active slider 1-2 pushes the driven slider 1-3 to run around the axis of the base 1-1 through contact. When it moves to the predetermined position, the cutting depth is reached, and the rotating locking sleeve 1-6 is rotated to the locking position. The inner surface of the rotating locking sleeve 1-6 and the first protrusion 62 are rotated to the upper surface of the second protrusion 64 on the upper end face of the sliding pressure plate 1-5. Since the rotating locking sleeve 1-6 is locked in the axial position by the locking screw 1-8, the rotating locking sleeve 1-6 will generate a large axial force to press the sliding pressure plate 1-5. The sliding pressure plate 1 -5 transmits the clamping force to the slave block slider 1-3 below it. The slave block slider is squeezed by the bottom surfaces of the third annular groove 66 and the fourth annular groove 67 and the lower surface 1-5-4 of the sliding pressure plate from top to bottom, thereby generating a large locking force and being fixed at a specific position in the third annular groove 66 and the fourth annular groove 67. Since the axial height of the active slider 1-2 is not as high as that of the driven slider 1-3, the lower surface 1-5-4 of the sliding pressure plate cannot generate a clamping force on the active slider 1-2, and the active slider 1-2 can still move freely in the third annular groove 66 and the fourth annular groove 67.

[0039] Loosening the operating handle drives the above-mentioned rotating shaft 14 to rotate, and the rotating shaft 14 drives the active slider 1-2 to rotate through 14-2 on the shaft. When drilling and cutting again, the operating handle drives the above-mentioned rotating shaft 14 to rotate, and at the same time drives the active slider 1-2 to rotate. When it rotates to the position of the slave slider 1-3, the active slider 1-2 is blocked by the slave slider 1-3 and cannot continue to rotate, so that it stops at the position where the driven slider 1-3 was locked last time, and this position is exactly the position where the drill sleeve 12 ran last time, that is, the depth position of the drill chuck, thereby realizing the setting of the drilling depth value.

[0040] The rotating locking sleeve 1-6 is moved to the unlocking position, and the first protrusion 62 on the inner surface of the rotating locking sleeve 1-6 is rotated into the gap between the two second protrusions 64 on the upper end surface of the sliding pressure plate 1-5. As the rotating locking sleeve 1-6 moves upward, the pressing force on the slave slider 1-3 from the bottom of the sliding pressure plate 1-5 disappears, and the driven slider 1-3 recovers to a free state. The driven slider 1-3 can be pushed by the active slider 1-2, and the driven slider 1-3 can also recover to the effect of the rebound force of the rebound member 1-4, thereby ensuring that the driven slider 1-3 always keeps in contact with the active slider 1-2.

[0041] like Figure 6-8 As shown:

[0042] Figure 6 It is a schematic diagram of the non-locked state of the active slider 1-2 and the driven slider 1-3. In the figure, the active slider 1-3 is not locked by the pressure of the sliding pressure plate 1-5 and is in a free state. Under the action of the rebound force of the rebound extension rod 1-4-1, it is ensured that the driven slider 1-3 always keeps in contact with the active slider 1-2.

[0043] Figure 7 It is a schematic diagram of the locking state of the active slider 1-2 and the driven slider 1-3. In the figure, the driven slider 1-3 is locked by the pressure of the sliding pressure plate 1-5 and is in a fixed locked state, and the active slider 1-2 returns counterclockwise under the drive of the handle, and the driven slider 1-3 is separated from the active slider 1-2 by a distance.

[0044] Figure 8 It is a force diagram of the locked state of the active slider 1-2 and the driven slider 1-3. The active slider 1-2 is driven by the operating handle, the rotating shaft 14, and the rotating shaft pin 14-2, and contacts with the driven slider 1-3 again, that is, the set depth position. On the action surface of the active slider 1-2 and the driven slider 1-3, the active slider 1-2 exerts a force F on the driven slider 1-3. Since the contact surface is not completely radial, but has an angle α with the diameter direction, F is decomposed into a circumferential force F1 and a radial force F2. F2 is the radial pressure of the outer wall 1-3 of the driven slider 1-3 on the outer ring side wall of the slide groove 1-1-1. This pressure can make the resistance of the driven slider 1-3 to the active slider 1-2 generate a force in addition to the locking pressure of the sliding pressure plate 1-5. These forces further increase the friction resistance of the driven slider 1-3, and the locking position is more reliable.

[0045] Figure 9-10 The rotary locking sleeve 1 - 6 is illustrated with two specific positions of locking and releasing.

[0046] The rotating locking sleeve 1-6 has two specific positions and can have more than two identification methods to indicate the current state:

[0047] An indication window 1-6-2 is opened along the circumferential direction on the outer end surface of the rotating locking sleeve 1-6, and the indication window 1-6-2 corresponds to the upper end surface of the sliding pressure plate 1-5. The position of the upper end surface of the sliding pressure plate corresponding to the indication window 1-6-2 can be painted with different colors or fonts at two specific positions of locking and unlocking to indicate the locking and unlocking positions.

[0048] An indicating device 1-6-1 is arranged on the outer periphery of the rotating locking sleeve 1-6, and an unlocking position 2-1 and a locking position 2-2 are arranged on the bench drill body 2. The locking sleeve 1-6 can be rotated to two positions to indicate the locking and unlocking positions.

[0049] Fig.10In the process, when at any depth of the drilling, the rotary locking sleeve 1-6 is rotated 90 degrees clockwise, the depth adjustment positioning mechanism is in a locked state, and the driven slider 1-3 is locked in a fixed position. When the active slider 1-2 is rotated to the position of the slave slider 1-3 again, the active slider 1-2 is blocked by the slave slider 1-3 and cannot continue to rotate.

[0050] Fig. 9 In the process, the locking sleeve 1-6 is rotated 90 degrees counterclockwise, the depth adjustment positioning mechanism is in a released state, and the driven slider 1-3 can be rotated flexibly. No matter what state the handle is in, the cutting depth cannot be locked.

[0051] The above embodiments are only preferred embodiments of the present invention and are not intended to limit the protection scope of the present invention. Therefore, any equivalent changes made based on the structure, shape, and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A bench drill depth adjustment and positioning mechanism, It is characterized in that The invention comprises a bench drill body (2) and a depth adjustment mechanism (1) arranged on one side of the bench drill body (2), wherein the depth adjustment mechanism (1) comprises a base (1-1) fixed on one side of the bench drill body (2), a rotating shaft (14) passing through the base (1-1), a resilient member (1-4) being arranged in the base (1-1), one end of the resilient member (1-4) being connected to a driven slider (1-3), and one side of the driven slider (1-3) being in contact with an active slider (1-2). The active slider (1-2) is provided with a slot (60), the slot (60) is engaged with a bayonet pin (14-2) provided through one end of the rotating shaft (14), one side of the driven slider (1-3) is provided with a sliding pressure plate (1-5), one side of the sliding pressure plate (1-5) is provided with a rotary locking sleeve (1-6), the rotary locking sleeve (1-6) can realize the pressing and releasing of the sliding pressure plate (1-5) and the driven slider (1-3), thereby realizing the locking and releasing of the cutting depth position; There is a size difference between the driven slider (1-3) and the active slider (1-2) in the direction of being pressed, and the distance between the driven slider (1-3) and the sliding pressure plate (1-5) is smaller than the distance between the active slider (1-2) and the sliding pressure plate (1-5); The active slider (1-2) pushes the driven slider (1-3) to move around the axis of the base (1-1) through contact, and when it moves to a predetermined cutting depth position, the rotating locking sleeve (1-6) is rotated to a locking position, and a first protrusion (62) on the inner surface of the rotating locking sleeve (1-6) is rotated onto the upper surface of a second protrusion (64) on the upper end surface of the slider pressure plate (1-5).

2. The bench drill depth adjustment and positioning mechanism according to claim 1, It is characterized in that The inner wall of the rotary locking sleeve (1-6) is provided with at least two first protrusions (62), and the first protrusions (62) cooperate with second protrusions (64) formed on the sliding pressure plate (1-5).

3. The bench drill depth adjustment and positioning mechanism according to claim 2, It is characterized in that Inclined surfaces (65) are provided on both sides of the first protrusion (62) and the second protrusion (64).

4. The bench drill depth adjustment and positioning mechanism according to claim 1, It is characterized in that At least one groove (1-5-2) is provided on the outer side of the sliding pressure plate (1-5), and the groove (1-5-2) is engaged with at least one boss (1-1-3) provided on the inner wall of the base (1-1).

5. The bench drill depth adjustment and positioning mechanism according to claim 1, It is characterized in that There is an included angle α between the abutment point between the driven slider (1-3) and the active slider (1-2) and the diameter direction.

6. The bench drill depth adjustment and positioning mechanism according to claim 1, It is characterized in that A locking screw (1-8) is inserted into the rotation locking sleeve (1-6), and the locking screw (1-8) is threadedly connected to a threaded hole (14-1) provided at one end of the rotating shaft (14).

7. The bench drill depth adjustment and positioning mechanism according to claim 6, It is characterized in that An elastic corrugated spring sheet (1-7) is arranged between the rotary locking sleeve (1-6) and the locking screw (1-8).

8. The bench drill depth adjustment and positioning mechanism according to claim 1, It is characterized in that The base (1-1) is provided with a third annular groove (66) for accommodating a resilient member (1-4) and a fourth annular groove (67) for accommodating a driven slider (1-3) and an active slider (1-2), respectively; a positioning hole (68) for fixing the resilient member (1-4) is provided at the bottom of the third annular groove (66); the other end of the resilient member (1-4) is snap-fitted with a groove (1-3-2) provided in the driven slider (1-3).

9. The bench drill depth adjustment and positioning mechanism according to claim 1, It is characterized in that An unlocking position (2-1) and a locking position (2-2) are respectively provided on the bench drill body, and an indicating device (1-6-1) for indicating the unlocking position (2-1) and the locking position (2-2) is provided on the outer wall of the rotating locking sleeve (1-6).

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