TW202003138A - Auxiliary handle for a portable band saw - Google Patents

Abstract

The present invention is an auxiliary handle for a portable band saw includes a handle base, a handle assembly, a positioning assembly, and an elastic member. The handle assembly has a spindle passing through the handle base and an auxiliary handle pivotally mounted to the spindle. The positioning assembly has a first member rotatably disposed on the auxiliary handle and a second member movably sleeved on the spindle. The first and second member each has a corresponding gear teeth portion formed thereon such that the gear teeth portions are meshed. When the first member is rotated with the auxiliary handle the second member is pushed backward by a rotation of the first member, wherein the elastic member abuts against the second member simultaneously pushes the second member forward such that it provides feedback to user when the user is rotatably adjusting the auxiliary handle.

Description

Auxiliary handle positioning mechanism of portable band saw machine

The invention relates to a portable band saw machine, in particular to an auxiliary handle positioning mechanism of the portable band saw machine.

US Patent Publication No. 20090265943 discloses a portable band saw machine, which is mainly used to allow operators to cut metal workpieces (such as pipes). The aforementioned patent case has an auxiliary handle in structure. In addition to providing operational stability, the auxiliary handle can also be adjusted at various angles, so that the operator can select a comfortable and easy to apply position for the operation of the band saw machine.

However, in the aforementioned patent case, the auxiliary handle lacks the operating feel of positioning feedback during the angle adjustment process, which prevents the operator from accurately grasping the angle adjustment situation. Moreover, the positioning effect of the auxiliary handle is not ideal, so that during the operation process There is a risk of loosening.

The main object of the present invention is to provide an auxiliary handle positioning mechanism for a portable band saw machine, which can generate an operation feel of positioning feedback when adjusting an operation angle, and is not easy to loosen.

In order to achieve the above main objective, the auxiliary handle positioning mechanism of the present invention includes a handle base, a handle assembly, a positioning assembly and an elastic member. The inside of the handle base is hollow; the handle assembly has a mandrel and an auxiliary handle, the mandrel passes through the handle base, the auxiliary handle has a grip portion, a first arm portion and a second arm portion , One end of the first and second arm portions is connected to the grip portion, the other end of the first and second arm portions is pivotally sleeved on both ends of the mandrel; the positioning assembly has a first positioning And a second positioning member, the first positioning member has a first ring portion, the first ring portion is fixed to one of the arm portions of the auxiliary handle and is pivotally sleeved on the mandrel, so that The first positioning member can rotate together with the auxiliary handle, the second positioning member has a second ring portion, the second ring portion is movable in the axial direction of the mandrel and is disposed in the handle base and can be along The axial movement of the mandrel is sleeved on the mandrel so that the second positioning member does not rotate along with the first positioning member. In addition, the first positioning member further has a first ring tooth portion, the The second positioning element further has a second ring tooth portion, the first ring tooth portion of the first positioning element engages with the second ring tooth portion of the second positioning element; the elastic element is sleeved on the mandrel and The two ends of the second positioning part are pressed against the second ring part of the second positioning part and the handle seat, respectively, for providing elastic force to push the second positioning part towards the direction of the first positioning part.

As can be seen from the above, when adjusting the auxiliary handle, the auxiliary handle will drive the first positioning member to rotate together, so that between the first ring tooth portion of the first positioning member and the second ring tooth portion of the second positioning member It will change from the state of being engaged with each other to the state of pushing each other. At this time, the second positioning member is pushed by the first positioning member and moves away from the first positioning member along the axis of the mandrel. Then, when the auxiliary handle continues to rotate, so that the first ring tooth portion of the first positioning member releases the thrust force applied to the second ring tooth portion of the second positioning member, the second positioning member is subjected to the action of the elastic member The first positioning member returns to the state of being engaged with each other. In this way, the auxiliary handle positioning mechanism of the present invention can produce an operation feel of positioning feedback when adjusting the angle of the auxiliary handle, and is more difficult to loosen.

Preferably, the handle base has a peripheral wall, the peripheral wall has a limiting groove, the second positioning member has a limiting convex portion, the limiting convex portion is provided on the outer surface of the second ring portion and can be along The axial displacement of the mandrel is embedded in the limiting groove. Thereby, the second positioning member does not rotate with the first positioning member, and can only move relative to the first positioning member along the axis of the mandrel.

Preferably, the end of the first arm portion of the auxiliary handle has a first sleeve portion, the first sleeve portion has a set of holes and a plurality of protruding ribs, the protruding ribs extend from the hole wall of the set of holes along the The sleeve hole extends radially. In addition, the first positioning member further has a plurality of engaging portions, the engaging portions are disposed on a side of the first ring portion opposite to the first ring tooth portion and embedded in the sleeve hole, the embedded The clamping portions are arranged at intervals with respect to the center of the first ring portion, so that a protruding rib groove is formed between two adjacent clamping portions, and the protruding rib groove is engaged with one of the protruding ribs. Thereby, the first positioning member can rotate together with the auxiliary handle.

Preferably, the first sleeve part of the auxiliary handle has an abutting rim, the handle assembly further has a knob, the knob is rotatably provided on the mandrel and has a flange, when the knob is in a lock When in position, the flange of the knob pushes against the abutting ring edge of the first sleeve part of the auxiliary handle, so that the first ring part of the first positioning member is positioned at the opening edge of the peripheral wall of the handle base, at this time The angle of the auxiliary handle cannot be adjusted; on the contrary, when the knob is in the unlocked position, the flange of the knob loosens the resisting rim of the first sleeve portion of the auxiliary handle, so that the first of the first positioning member The ring part is loosened from the opening periphery of the peripheral wall of the handle base, and the angle of the auxiliary handle can be adjusted at this time.

The detailed structure, features, assembly or use of the auxiliary handle positioning mechanism of the portable band saw machine provided by the present invention will be described in the detailed description of the subsequent embodiments. However, those of ordinary knowledge in the field of the present invention should be able to understand that these detailed descriptions and specific embodiments listed for implementing the present invention are only used to illustrate the present invention, and are not intended to limit the scope of the patent application of the present invention.

The applicant first explains here that in the embodiments and drawings to be described below, the same reference numbers indicate the same or similar elements or their structural features.

Please refer to FIG. 1 first, the portable band saw machine 10 shown in the figure is a conventional technology, and the applicant will not repeat its detailed structure and operation principle here. Please refer to FIGS. 1 and 2 again. The auxiliary handle positioning mechanism 14 of the present invention includes a handle base 20, a handle assembly 30, a positioning assembly 70, and an elastic member 72.

The handle base 20 is fixed to one end of a casing 12 of the portable band saw machine 10. The inside of the handle base 20 is hollow. More specifically, as shown in FIGS. 2 and 6, the handle base 20 has a peripheral wall 21 and an end wall 25, and one end of the peripheral wall 21 is connected to the end wall 25 and between the end wall 25 A receiving groove 27 is formed, the other end of the peripheral wall 21 has an opening 22 communicating with the receiving groove 27 and a limiting groove 23 (shown in FIG. 5) adjacent to the opening 22, and the end wall 25 has a receiving groove 27之端孔26。 The end hole 26.

The handle assembly 30 has a mandrel 40, a nut 44, an auxiliary handle 50 and a knob 60, wherein:

As shown in FIGS. 2 and 6, the mandrel 40 has a head 41 and a body 42. The head 41 is located outside the receptacle 27 of the handle base 20, and the body 42 sequentially passes through the end wall 25 of the handle base 20 The end hole 26, the receptacle 27 of the handle base 20 and the opening 22 of the peripheral wall 21 of the handle base 20, one end of the body 42 is located outside the receptacle 27 of the handle base 20 and connected to the head 41, and the other end of the body 42 is also located The handle base 20 has a threaded section 43 outside the receiving slot 27.

The nut 44 (in this embodiment, a hexagon nut) is screwed on the threaded section 43 of the body 42 of the mandrel 40.

The auxiliary handle 50 has a grip portion 51, a first arm portion 52 and a second arm portion 56, one end of the first and second arm portions 52 and 56 is connected to the grip portion 51, the first and second arm portions 52 , 56 has a first sleeve portion 53 and a second sleeve portion 57 at the other end, wherein the first sleeve portion 53 has a set of holes 54 and four ribs 55, as shown in Figures 2 and 4 , The sleeve hole 54 is used to allow the body 42 of the mandrel 40 to pass through, and the convex ribs 55 extend from the hole wall of the sleeve hole 54 along the radial direction of the sleeve hole 54 toward the mandrel 40, in addition, as in the sixth As shown in the figure, one end mask of the first sleeve portion 53 has an abutting rim 532, and the other opposite end mask of the first sleeve portion 53 has an abutting rim 534. As for the second sleeve portion 57 abutting against the end wall 25 of the handle base 20 and having a countersunk hole 58, as shown in FIG. 6, the countersunk hole 58 is used to accommodate the head 41 of the mandrel 40 and also used To allow the body 42 of the mandrel 40 to pass through, and furthermore, a washer 59 can be provided between the second sleeve portion 57 and the end wall 25 of the handle base 20 to prevent the surface wear caused by the relative rotation of the two .

The knob 60 has a shaft portion 61, a shaft hole 62 penetrating the shaft portion 61, and a flange 63 adjacent to the shaft portion 61. As shown in FIGS. 2 and 6, the shaft portion 61 passes through the first set of the auxiliary handle 50 In the sleeve hole 54 of the cylindrical portion 53, the shaft hole 62 is sleeved on the threaded section 43 of the body portion 42 of the mandrel 40, and the flange 63 abuts against the abutment ring 534 of the first sleeve portion 53 of the auxiliary handle 50. In addition, the knob 60 further has an inner hexagonal hole 64 communicating with the shaft hole 62. As shown in FIG. 6, the knob 60 is locked to the nut 44 by using the inner hexagonal hole 64. When the knob 60 is rotated by an external force, it can drive the screw The cap 44 rotates together, and at the same time, through the screw connection between the nut 44 and the mandrel 40, the knob 60 can move toward the first sleeve portion 53 of the auxiliary handle 50 or away from the auxiliary handle 50. A sleeve portion 53 moves in the direction.

The positioning assembly 70 has a first positioning member 80 and a second positioning member 90, as shown in FIGS. 2 and 3:

The first positioning member 80 has a first ring portion 81, four engaging portions 82 and a first ring tooth portion 83. The engaging portions 82 are integrally provided on one side of the first ring portion 81 and are arranged in a ring shape at an equal interval with respect to the center of the first ring portion 81, so that a rib is formed between two adjacent engaging portions 82 The groove 84; the first ring tooth portion 83 is integrally provided on the other opposite side surface of the first ring portion 81. During assembly, as shown in FIGS. 4 and 6, the first positioning member 80 is sleeved on the body 42 of the mandrel 40 by the first ring portion 81 and is inserted into the auxiliary handle 50 by the locking portions 82. A sleeve portion 54 of the sleeve portion 53 is engaged with the rib 55 of the first sleeve portion 53 of the auxiliary handle 50 in a one-to-one manner using the rib groove 84 so that the first positioning member 80 can follow the auxiliary handle 50 rotates relative to the mandrel 40 together. In addition, as shown in FIG. 6, one side of the first ring portion 81 of the first positioning member 80 abuts against the ring edge 532 of the first sleeve portion 53 of the auxiliary handle 50, and the first positioning member 80 The other opposite side of the first ring portion 81 abuts against the opening periphery 24 of the peripheral wall 21 of the handle base 20 through a washer 86. The washer 86 is also used to prevent the surface wear caused by the relative rotation of the two.

The second positioning member 90 has a second ring portion 91, a limiting convex portion 92, a tube portion 93, and a second ring tooth portion 94. The limiting convex portion 92 integrally protrudes from the outer ring surface of the second ring portion 91 along the radial direction of the mandrel 40; the tube portion 93 integrally extends from one side of the second ring portion 91 along the mandrel 40 The second ring tooth portion 94 is integrally provided on the other opposite side surface of the second ring portion 91. During assembly, as shown in FIGS. 5 and 6, the second positioning member 90 is disposed in the receiving slot 27 of the handle base 20, and the second positioning member 90 is sleeved on the body portion 42 of the mandrel 40 using the second ring portion 91 Moreover, the limiting protrusion 92 is inserted into the limiting groove 23 of the peripheral wall 21 of the handle base 20, so that the second positioning member 90 can only move along the axial direction of the mandrel 40 and cannot rotate relative to the mandrel 40. In addition, As shown in FIG. 3, the second positioning member 90 uses the second ring tooth portion 94 to engage with the first ring tooth portion 83 of the first positioning member 80. Furthermore, in order to maintain a good engagement effect between the two , The first ring tooth portion 83 of the first positioning member 80 has a plurality of first convex teeth 85, and the second ring tooth portion 94 of the second positioning member 90 has a plurality of second convex teeth 95, two adjacent first, The angle θ between the second convex teeth 85 and 95 is 40 degrees in this embodiment.

The elastic member 72 (in this embodiment, a compression spring) is disposed in the receiving slot 27 of the handle base 20 and is sleeved on the body 42 of the mandrel 40. Both ends of the elastic member 72 abut against the ends of the handle base 20, respectively The wall 25 and the second ring portion 91 of the second positioning member 90 are used to provide elastic force to push the second positioning member 90 in the direction of the first positioning member 80.

When the angle of the auxiliary handle 50 needs to be adjusted, first turn the knob 60 to an unlocked position P1 (as shown in FIG. 7), so that the flange 63 of the knob 60 loosens the receiving of the first sleeve portion 53 of the auxiliary handle 50 Against the ring edge 534, the first ring portion 81 of the first positioning member 80 at this time will loosen from the opening peripheral edge 24 of the peripheral wall 21 of the handle base 20, and then the auxiliary handle 50 can be pushed up or down to make the auxiliary handle 50 pivots up and down relative to the handle base 20 to adjust the angle. Since the first positioning member 80 will pivot with the auxiliary handle 50 relative to the mandrel 40, the second positioning member 90 cannot pivot relative to the mandrel 40, so when the auxiliary handle 50 starts to rotate, the first positioning member 80 The first protruding teeth 85 of the first ring tooth portion 83 and the second protruding teeth 95 of the second ring tooth portion 94 of the second positioning member 90 will change from the original state of meshing with each other (as shown in FIG. 7) In the state of pushing each other (as shown in FIG. 8 ), the second positioning member 90 is pushed by the first positioning member 80 and moves away from the first positioning member 80 along the axis of the mandrel 40 and Simultaneously press the elastic member 72, and then when the auxiliary handle 50 continues to rotate, the first convex teeth 85 of the first ring tooth portion 83 of the first positioning member 80 and the second convex teeth 85 of the second ring tooth portion 94 of the second positioning member 90 The teeth 95 will be staggered from each other, and at this time, the second positioning member 90 will immediately receive the restoring force of the elastic member 72 and return to the state of mutual engagement with the first positioning member 80 (as shown in FIG. 7 ). It can be seen that during the continuous rotation of the auxiliary handle 50, the first ring tooth portion 83 of the first positioning member 80 and the second ring tooth portion 94 of the second positioning member 90 repeatedly engage and disengage Until the auxiliary handle 50 stops turning.

Once the auxiliary handle 50 is adjusted to an appropriate angle, turn the knob 60 to a locked position P2 (as shown in FIG. 6). At this time, the knob 60 will use the flange 63 to push the first set of the auxiliary handle 50 The abutting rim 534 of the cylindrical portion 53 and then the abutting rim 532 of the first sleeve portion 53 of the auxiliary handle 50 will push the first ring portion 81 of the first positioning member 80 further, so that the first positioning member 80 The first ring portion 81 abuts against the opening periphery 24 of the peripheral wall 21 of the handle base 20, so that the auxiliary handle 50 cannot rotate and complete positioning.

In summary, the auxiliary handle positioning mechanism 14 of the present invention utilizes the meshing relationship between the first and second positioning members 80 and 90 and the elastic force provided by the elastic member 72 to enable the auxiliary handle 50 to generate positioning feedback when adjusting the angle Feel, and it is more difficult to loosen, which increases the structural stability.

10‧‧‧Portable band saw machine 12‧‧‧case 14‧‧‧ auxiliary handle positioning mechanism 20‧‧‧handle seat 21‧‧‧peripheral wall 22‧‧‧opening 23‧‧‧limit slot 24‧‧ ‧Opening edge 25‧‧‧End wall 26‧‧‧End hole 27‧‧‧Slot 30‧‧‧Handle assembly 40‧‧‧Spindle 41‧‧‧Head 42‧‧‧Body 43‧‧‧Thread Paragraph 44‧‧‧ Nut 50‧‧‧Auxiliary handle 51‧‧‧ Grip part 52‧‧‧First arm part 53‧‧‧ First sleeve part 54‧‧‧Sleeve hole 55‧‧‧Convex rib 532 ‧‧‧ against the rim 534 ‧‧‧ against the rim 56 ‧ ‧ ‧ second arm part 57 ‧ ‧ ‧ second sleeve part 58 ‧ ‧ ‧ countersunk hole 59 ‧ ‧ ‧ washer 60 ‧ ‧ ‧ knob 61 ‧‧‧Shaft part 62‧‧‧Shaft hole 63‧‧‧Flange 64‧‧‧Hexagonal hole 70‧‧‧‧Positioning component 72‧‧‧Elastic part 80‧‧‧First positioning part 81‧‧‧First Ring part 82‧‧‧Embedded part 83‧‧‧First ring tooth part 84‧‧‧Convex rib groove 85‧‧‧First convex tooth 86‧‧‧ Washer 90‧‧‧Second positioning member 91‧‧‧ The second ring portion 92‧‧‧ limit convex portion 93‧‧‧ tube portion 94‧‧‧ second ring tooth portion 95‧‧‧ second convex tooth θ‧‧‧ included angle P1‧‧‧ unlock position P2‧‧‧ Locked position

FIG. 1 is an external perspective view of a portable band saw machine to which the auxiliary handle positioning mechanism of the present invention is applied. FIG. 2 is an exploded perspective view of the auxiliary handle positioning mechanism of the present invention. FIG. 3 is an exploded perspective view of the first and second positioning members provided by the auxiliary handle positioning mechanism of the present invention. FIG. 4 is a combined end view of the auxiliary handle and the first positioning member provided by the auxiliary handle positioning mechanism of the present invention. FIG. 5 is a combined end view of the handle base and the second positioning member provided by the auxiliary handle positioning mechanism of the present invention. FIG. 6 is a cross-sectional view of the auxiliary handle positioning mechanism of the present invention, mainly showing that the knob is in the locked position. Figure 7 is the same as Figure 6, showing that the knob is in the unlocked position. Figure 8 is similar to Figure 7 and mainly shows that the first ring tooth portion of the first positioning member pushes the second ring tooth portion of the second positioning member.

14‧‧‧Auxiliary handle positioning mechanism

20‧‧‧handle seat

21‧‧‧ Zhoubi

22‧‧‧ opening

24‧‧‧Opening periphery

25‧‧‧End wall

26‧‧‧End hole

30‧‧‧handle assembly

40‧‧‧mandrel

41‧‧‧Head

42‧‧‧ Body

43‧‧‧Thread section

44‧‧‧Nut

50‧‧‧Auxiliary handle

51‧‧‧ Grip

52‧‧‧First arm

53‧‧‧First sleeve part

54‧‧‧Sleeve

55‧‧‧rib

56‧‧‧Second arm

57‧‧‧Second sleeve part

58‧‧‧Sunk head hole

59‧‧‧washer

60‧‧‧ knob

61‧‧‧Shaft

62‧‧‧Shaft hole

63‧‧‧Flange

70‧‧‧Positioning components

72‧‧‧Elastic parts

80‧‧‧First positioning piece

81‧‧‧ First Ring

82‧‧‧Embedded Department

83‧‧‧The first ring tooth

84‧‧‧rib groove

86‧‧‧washer

90‧‧‧Second positioning piece

91‧‧‧ Second Ring Department

92‧‧‧Limit convex

93‧‧‧Administration

Claims (7)

An auxiliary handle positioning mechanism of a portable band saw machine includes: a handle base with a hollow interior; a handle assembly having a mandrel and an auxiliary handle, the mandrel passing through the handle base, the auxiliary handle having a A grip portion, a first arm portion and a second arm portion, one end of the first and second arm portions is connected to the grip portion, and the other ends of the first and second arm portions are pivotally sleeved on Two ends of the mandrel; a positioning component having a first positioning element and a second positioning element, the first positioning element has a first ring portion, the first ring portion is fixed on one of the auxiliary handles The arm portion is pivotally sleeved on the mandrel, the second positioning member has a second ring portion, the second ring portion is movably provided on the handle base along the axial direction of the mandrel, and can be The mandrel is sleeved along the axial direction of the mandrel, the first positioning member further has a first ring tooth portion, the second positioning member further has a second ring tooth portion, and the first positioning member The first ring tooth portion engages with the second ring tooth portion of the second positioning member, so that the first positioning member can push the second positioning member when driven by the auxiliary handle, so that the second positioning member Moving the axis of the mandrel away from the first positioning member; and an elastic member sleeved on the mandrel and abutting the second ring portion of the second positioning member and the handle base with its two ends , For providing elastic force to push the second positioning member toward the direction of the first positioning member. The auxiliary handle positioning mechanism of the portable band saw machine according to claim 1, wherein the handle base has a peripheral wall and an end wall, one end of the peripheral wall is connected to the end wall and a receiving groove is formed between the end wall, The other end of the peripheral wall has an opening communicating with the receiving slot, the end wall has an end hole communicating with the receiving slot; the mandrel penetrates the receiving slot of the handle seat, the opening of the peripheral wall of the handle seat and the handle The end hole of the end wall of the seat, and both ends of the mandrel are located outside the receiving slot of the handle seat; the first positioning member is provided in the opening of the handle seat; the second positioning member is provided in the receiving slot of the handle seat The elastic member is disposed in the receiving groove of the handle base and abuts against the end wall of the handle base and the second ring portion of the second positioning member. The auxiliary handle positioning mechanism of the portable band saw machine according to claim 2, wherein the peripheral wall of the handle base further has a limiting groove, and the second positioning member further has a limiting convex portion, the limiting convex portion The outer ring surface of the second ring portion is inserted into the limiting groove so as to be displaceable along the axial direction of the mandrel. The auxiliary handle positioning mechanism of the portable band saw machine according to claim 2, wherein the end of the first arm portion of the auxiliary handle has a first sleeve portion, the first sleeve portion has a set of holes and multiple A plurality of protruding ribs, the protruding ribs extend from the hole wall of the sleeve hole along the radial direction of the sleeve hole, the first positioning member further has a plurality of engaging portions, and the engaging portions are provided on the first ring portion Opposite to a side of the first ring tooth part and embedded in the sleeve hole, the engaging parts are arranged in a spaced ring shape with respect to the center of the first ring part, so that between adjacent two engaging parts A protruding rib groove is formed, and the protruding rib groove is engaged with the protruding rib. The auxiliary handle positioning mechanism of the portable band saw machine according to claim 4, wherein the first sleeve portion of the auxiliary handle has a bearing ring; the handle assembly further has a knob, the knob has an outer peripheral surface A flange, and the knob is rotatably provided on the mandrel between a locked position and an unlocked position, and when the knob is in the locked position, the flange of the knob pushes the first sleeve of the auxiliary handle The receiving ring edge of the part positions the first ring part of the first positioning member at the opening edge of the peripheral wall of the handle base. When the knob is in the unlocked position, the flange of the knob loosens the first part of the auxiliary handle A receiving ring edge of a sleeve portion makes the first ring portion of the first positioning member loose from the opening edge of the peripheral wall of the handle base. The auxiliary handle positioning mechanism of the portable band saw machine according to claim 5, wherein one end of the mandrel has a threaded section, the handle assembly further has a nut, and the nut is screwed on the thread of the mandrel The knob has an inner hexagon hole, and the inner hexagon hole is engaged with the nut. The auxiliary handle positioning mechanism of the portable band saw machine according to claim 1, wherein the first ring tooth portion of the first positioning member has a plurality of first protruding teeth, between two adjacent first protruding teeth The included angle is 40 degrees, the second ring tooth portion of the second positioning member has a plurality of second convex teeth, and the included angle between two adjacent second convex teeth is 40 degrees.

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