TWI505916B - Multi-mode wrench - Google Patents

Description

Wrench for narrow spaces

The invention relates to the field of idling of a wrench, in particular to a wrench capable of performing a torque transmission operation with a standard or small idling angle without changing the number of teeth.

The wrench usually has a gear mounted on a hollow head, and a substantially claw-shaped latch structure in the head, which can engage the teeth outside the gear, determine the head to unidirectionally circulate around the gear, and reversely drive the gear to rotate synchronously. Output torque. In this way, the wrench drives the gear to rotate synchronously with the head drive, and it is necessary to reverse the idling when reaching a certain range, so as to continue to apply force.

However, the number of teeth of the gear is constant, so the idling angle is just the amplitude of the squeezing structure over the teeth. Therefore, the gear idling angle is related to the number of teeth, the number of teeth is small, the idling range is large, the number of teeth is large, and the idling range is small. Such a wrench can be difficult to use in some work situations, especially at construction sites where the operation space is narrow.

In order to solve the above problems, some practitioners have proposed a method of increasing the number of teeth on the outside of the gear. Although the disadvantages of the prior art regarding the excessive idling amplitude are overcome, a new problem arises: the width of the teeth is narrowed and relatively reduced. The compressive strength of the teeth. The reason is that during the synchronous rotation of the head-driven gear, the torque exceeds the pressure of the tooth, and the crack of the tooth is prone to occur, and the kinetic energy cannot be transmitted to the workpiece, and the torque cannot be continuously output.

Therefore, the inventor proposed a wrench with a variable small idling angle according to the concept of idling angle change, and applied for patents to various countries, namely, EU No. 12195169.3, US No. 13/691, 477, Japan No. 2013-170474 No., China No. 201210507001.6 and Taiwan No. 101139643, etc.

The inventor was not complacent, and he was still concentrating on new technology research and finally succeeded in developing a wrench for narrow spaces. The main purpose of the invention is to: The constant conditions are provided, and modes such as "normal space" and "narrow space" are provided, and different idle amplitudes are selected as needed.

As a result of the above object, the present invention provides a wrench comprising: a body having a hollow head, the head being connected to a grip portion, and a wall having a C-shaped design standing outside the head such that a step is formed in the head. a hole, the holding portion has two guiding grooves, each guiding groove is located at a position adjacent to the surrounding wall of the grip portion and communicates with the stepped hole; a gear, the gear has a shaft inserted into the stepped hole, and the center of the shaft has a joint structure formed outside the shaft a plurality of consecutive teeth; each of the meshing components includes a corner post and an elastic member, and the two are placed in the same guide groove of the body, and the elastic members respectively touch the corner post and the wall surface of the guide groove, and push the corner post along the direction of the guide groove Gear displacement; a cover member having a ring portion, the ring portion enclosing the shaft, and sealing one end of the stepped hole to support the rotation of the gear relative to the body; and a button connected to the grip portion adjacent to the stepped hole Rotatable to shield the engaging component inside the guide groove, the dial forming a driving configuration facing the corner post.

When the button is forced to move to the "normal space" mode, the driving structure drives one of the two corner posts to retreat into the corresponding guide groove, so that the other corner post engages any of the teeth of the bite gear as a normal state, so that the wrench performs at a standard idle angle. swing.

When the button is forced to move to the "narrow space" mode, the two-corner column is no longer restricted by the driving structure, and the corresponding teeth of the gear can be alternately engaged to make the wrench swing with a small idle angle.

The term "rotational engagement" as used herein means that any corner post maintains an effective engagement relationship with the teeth of the corners and the gears. The corners of the other corner posts are separated from the teeth by a certain distance and no effective meshing relationship is formed.

Wherein, the joint structure is a polygonal sleeve hole extending through the center of the shaft, enough to cover a workpiece, such as a nut, a screw head and a polygonal column end of the connecting rod.

Of course, the joint structure can also be a polygonal cylinder protruding from the center of the shaft for inserting other workpieces, such as a polygonal groove of a sleeve or a connecting rod.

Hereinafter, the purpose, structure and characteristics of the related embodiments will be described in detail based on the drawings, and it is believed. The techniques, means and functions adopted by the present invention can be obtained from in-depth and specific understanding.

10‧‧‧Wrench

11‧‧‧Ontology

12‧‧‧ grip

13‧‧‧First channel

14‧‧‧Second guiding channel

15‧‧‧Combination hole

16‧‧‧ beads

17‧‧‧ small hole

20‧‧‧ head

21‧‧‧Wall

22‧‧‧step hole

23‧‧‧lower shoulder

24‧‧‧Upper shoulder

25‧‧‧ end face

30‧‧‧ Gears

32‧‧‧Axis

34‧‧‧ teeth

36‧‧‧ sockets

40‧‧‧Meshing components

41‧‧‧Active corner column

42‧‧‧Compression spring

43‧‧‧ driven corner column

44‧‧‧ Short column

50‧‧‧ Covers

51‧‧‧ Ring Department

52‧‧‧Combination Department

53‧‧‧The Department of the Fall

54‧‧‧Resistance

55‧‧‧ window

56‧‧‧ cone hole

60‧‧‧ dial

61‧‧‧Axis hole

62‧‧‧ Force Department

63‧‧‧ accommodating slots

64‧‧‧ Identification structure

65‧‧‧Protruding

66‧‧‧ recess

67‧‧‧Arc hole

68‧‧‧ recesses

80‧‧‧fasteners

82‧‧‧Compression spring

84‧‧‧ steel balls

86‧‧‧Restricted column

Figure 1 is a partially assembled perspective view of the wrench of the present invention.

Figure 2 is an exploded perspective view of the wrench.

Figures 3 and 4 are additional angle views of some of the components of the wrench.

Figures 5 and 6 are diagrams showing the state of use of the wrench in a narrow space mode.

Figures 7 and 8 are diagrams showing the state of use of the wrench in the normal space mode.

Referring to Figure 1, the specific construction of the wrench 10 is illustrated. The wrench 10 includes a body 11 having a grip portion 12, the grip portion 12 is integrally formed with a head 20, and a cover member 50 is disposed above the head 20. A gear 30 and a button 60 are mounted therebetween. . At this moment, the button 60 is in a narrow space mode and can be switched to a normal space mode.

As seen from Fig. 2, the head 20 is a flat annular casing that is located at one end of the grip portion 12 and has a C-shaped wall 21 standing outside the head 20. Different thicknesses are formed from the top end of the wall 21 to the bottom end of the housing, so that a stepped hole 22 into which the gear 30 is placed is formed in the head 20.

The surface of the grip portion 12 is recessed into a first guiding slot 13 and a second guiding slot 14 . The guiding slots 13 , 14 are separated from each other by a certain angle, and each guiding slot 13 , 14 is located at a position adjacent to the surrounding wall 21 of the grip portion 12 . It is in communication with the stepped bore 22 for receiving an engagement assembly 40. The grip portion 12 further has a coupling hole 15, a bead groove 16 and a small hole 17 distributed in the vicinity of the guide grooves 13, 14. The coupling hole 15 is interposed between the two guide grooves 13, 14 for connecting a fastener 80 such as a screw. The bead groove 16 is adjacent to the coupling hole 15. The inside of the bead groove sequentially receives a compression spring 82 and a steel ball 84. The diameter of the steel ball 84 is smaller than the opening diameter of the bead groove 16, and receives the thrust of the compression spring 82 to expose the partial bead to the grip portion. 12 outside. The wall of the small hole 17 is provided with a pressing fixing function toward the root of a restricting post 86, so that the restricting post 86 partially emerges from the grip portion 12.

In the present embodiment, the main body of the gear 30 is a circular shaft 32. The center of the shaft 32 has a joint structure. The outer circumferential surface of the shaft 32 forms 36 consecutive teeth 34. The ends of the corresponding teeth 34 are separated by a distance, which is larger than the internal The minimum diameter of the stepped bore 22 is also so large that the bottom end of the shaft 32 passes through an annular lower shoulder 23 located below the head 20 until the side of the tooth 34 is blocked by the lower shoulder 23, and the support gear 30 rotates relative to the head 20. In addition, the joint structure is a polygon penetrating the center of the shaft 32. Socket hole 36.

Next, the engagement member 40 received by the aforementioned first guide groove 13 is seen, which includes an active corner post 41 and an elastic member such as a compression spring 42. The compression spring 42 respectively touches the wall surface of the active corner post 41 and the closed end of the first guide groove 13, and pushes the active corner post 41 to the gear 30 in the direction of the first guide groove 13.

The engagement assembly 40 received by the aforementioned second guide groove 14 is also a corner post and another compression spring 42. The difference is that the top end of the corner post protrudes from a short post 44 defined as a driven corner post 43 spaced apart from the active corner post 41. During insertion of the driven corner post 43 into the second guide channel 14, the stud 44 will overtake the surface of the grip portion 12.

In the figure, the cover member 50 has an irregular contour and is defined as a ring portion 51 and a joint portion 52 as needed. The outer circumferential surface of the ring portion 51 conforms to the inner diameter of the wall 21, and can cover the upper half of the shaft 32 to abut against an annular upper shoulder portion 24 formed on the inner wall of the head 20 and above the lower shoulder portion 23, and is sealed at the same time. One end of the stepped hole 22 has a stability supporting effect on the rotation motion of the gear 30.

As is clear from Fig. 3, the joint portion 52 extends outward from the periphery of the ring portion 51, and the two are designed integrally, and a drop portion 53 is formed below the joint portion 52.

Referring back to Fig. 2, since the height of the upper shoulder portion 24 is flush with the surface of the grip portion 12, the portion of the joint portion 52 that extends beyond the gap of the wall 51 is maintained at a certain height between the grip portion 12 (or the body 11). Drop. The joint portion 52 has two resisting surfaces 54 and a window 55. Each of the resisting surfaces 54 is formed at a portion of the joint portion 52 adjacent to the ring portion 51, just facing the corresponding end surface 25 of the wall 21, preventing the cover member 50 from being offset from the head 20. . In the present embodiment, the window 55 is a notch structure that is trapped in the edge of the joint portion 52, just above the second guide groove 14, and a tapered hole 56 is formed in the cover member 50 adjacent to the window 55. The tapered hole 56 is directly facing the grip. The coupling hole 15 of the holding portion 12 facilitates the passage of the fastener 80 through the tapered hole 56 and the locking hole 15 .

It is not difficult to understand from Fig. 4 that one end of the button 60 forms a receiving portion 62, and a receiving groove 63 is recessed in the top surface of the other end, so that the partial thickness of the button 60 is thinned, and an identification structure is arranged on the bottom surface of the receiving groove 63. 64, such as numbers. The thinned portion has a shaft hole 61 and a driving structure for the through button 60. The entraining structure is a projection 65 that is raised from the edge of the dial 60. The projections 65 form a recess 66 at a distance.

According to the wrench 10 shown in Figures 1 and 2, the thickness of the button 60 is thinned. The portion is inserted between the joint portion 52 and the grip portion 12, allowing the fastener 80 to pass through the shaft hole 61. With the fastener 80 as the axis, the button 60 is biased to swing relative to the grip portion 12. Since the receiving groove 63 of the dial 60 coincides with the outer edge of the joint portion 52, and the lower drop portion 53 of the joint portion 52 conforms to the curvature of the edge of the dial 60, the dial 60 and the joint portion 52 complement each other, so that the force receiving portion 62 The outside of the joint portion 52 is exposed.

At this point, the knob 60 shields the engagement assembly 40 within the two guide slots 13, 14 such that the entrainment configuration faces the driven corner post 43, allowing the stud 44 to be placed into the recess 66. At the same time, the identification structure 64 portion of the number just faces the window 55 of the joint 52.

In addition, the button 60 has an arc hole 67 and two recesses 68. The arc hole 67 faces the small hole 17 of the grip portion 12, and the hole accommodates a portion of the restriction post 86. Since the width of the restriction post 86 is smaller than the distance between the two ends of the arc hole 67, the dial 60 can be restrained from swinging relative to the grip portion 12. Amplitude.

The recess 68 is formed on the bead groove 16 of the dial 60 facing the grip portion 12, and is sufficient for accommodating the portion where the steel ball 84 exposes the grip portion 12. The concave and convex joints cooperate to generate a certain resistance, and the dial button 60 is formed into a desired shape. Positioning effect.

As shown in Figures 5 and 6, the Arabic numeral 72 is read from the window 55 of the cover 50, and the wrench 10 is known to be in a narrow space mode. At this point, the stub 44 is not constrained by the projection 65, and the driven corner post 43 is brought into contact with the corresponding tooth 34 of the gear 30 by the compression spring 42. In this way, the gussets 41, 43 can be engaged with the teeth 34 in turn, so that the wrench 10 swings at a small idling angle. Simply put, it is the existing 36 teeth 34, but has a idling amplitude of 72 teeth 34.

Conversely, Figures 7 and 8 show that the window 55 of the cover 50 is read to the Arabic numeral 36, and it is known that the wrench 10 is in the normal space mode. Because the short post 44 is blocked by the protruding portion 65, the driven corner post 43 is retracted into the second guiding slot 14 as the dial 60 rotates, so that the active corner post 41 engages any of the teeth 34 of the gear 30 as a normal state, so that the wrench 10 is standard. The idling angle is oscillated.

If you are interested in the conversion of the idling angle, and you want to know more about the principle or technical means, you can refer to the descriptions of the patent applications filed by the inventors in the prior art column, and will not be repeated here.

The above examples are merely illustrative of the invention and are not intended to limit the invention. Various changes, modifications, and applications derived from the above-described embodiments will be apparent to those skilled in the art.

10‧‧‧Wrench

11‧‧‧Ontology

12‧‧‧ grip

13‧‧‧First channel

14‧‧‧Second guiding channel

15‧‧‧Combination hole

16‧‧‧ beads

17‧‧‧ small hole

20‧‧‧ head

21‧‧‧Wall

22‧‧‧step hole

23‧‧‧lower shoulder

24‧‧‧Upper shoulder

25‧‧‧ end face

30‧‧‧ Gears

32‧‧‧Axis

34‧‧‧ teeth

36‧‧‧ sockets

40‧‧‧Meshing components

41‧‧‧Active corner column

42‧‧‧Compression spring

43‧‧‧ driven corner column

44‧‧‧ Short column

50‧‧‧ Covers

51‧‧‧ Ring Department

52‧‧‧Combination Department

53‧‧‧The Department of the Fall

54‧‧‧Resistance

55‧‧‧ window

56‧‧‧ cone hole

60‧‧‧ dial

61‧‧‧Axis hole

62‧‧‧ Force Department

63‧‧‧ accommodating slots

65‧‧‧Protruding

66‧‧‧ recess

67‧‧‧Arc hole

68‧‧‧ recesses

80‧‧‧fasteners

82‧‧‧Compression spring

84‧‧‧ steel balls

86‧‧‧Restricted column

Claims (9)

A wrench for a narrow space includes: a body having a hollow head, the head being connected to a grip portion, and a wall having a C-shaped design standing outside the head such that a stepped hole is formed in the head, the holding The second portion has two guiding grooves, each guiding groove is located adjacent to the surrounding wall of the grip portion and communicates with the stepped hole; a gear, the gear has a shaft inserted into the stepped hole, and the center of the shaft has a joint structure, and a plurality of continuous teeth are formed outside the shaft; The two engaging components, each of the engaging components comprises a corner post and an elastic component, and the two are placed in the same guiding groove of the body, and the elastic component respectively touches the corner post and the guiding wall surface, and pushes the corner post to move along the guiding groove direction; The cover member has a ring portion and a joint extending outward from the periphery of the ring portion. The ring portion covers the shaft and seals one end of the stepped hole to support the rotation of the gear relative to the body. The joint portion extends beyond the gap of the wall to a certain gap is formed between the grip portions of the body; a button is inserted between the joint portion and the grip portion, and the three are coupled together by a fastener connected to the grip portion adjacent to the stepped hole Rotating to shield the engaging component inside the guiding slot, the dial forming a driving structure facing the corner post; when the dial is forced to move to a normal space mode, driving the structure to drive one of the two corner posts to return to the corresponding guide In the slot, the other corner post engages any of the teeth of the bite gear as the normal state, so that the wrench swings at the standard idle angle; when the dial is forced to move into a narrow space mode, the two-corner column is no longer restricted by the driving structure, The corresponding teeth of the gears are alternately engaged, so that the wrench swings at a small idle angle. The wrench for a narrow space according to claim 1, wherein the engaging member has a short post under the driving structure; the driving structure is a protrusion formed on the dial, and between the two protrusions. It is a recess that is trapped in the dial, allowing the short post to be placed in the recess of the dial; when the dial comes to the normal space mode, the short post is blocked by the protruding portion, and the corner post is returned to the corresponding guide slot as the dial rotates When the button is moved to the narrow space mode, the short column is not restrained by the protrusion, so that the two-corner column is pushed toward the gear by the elastic member to be able to alternately engage the corresponding tooth. The wrench for a narrow space according to the first aspect of the invention, wherein the button has a receiving portion and a receiving groove, and the receiving groove is formed on the top surface of the button, so that the button and the joint portion form a mutual The structure is complemented so that the force receiving portion is exposed outside the joint portion. A wrench for a narrow space according to claim 3, wherein the joint has a window, and the dial is disposed at an identification structure at the receiving groove facing the window. A wrench for a narrow space as described in claim 4, wherein the identification structure is selected from one of a group of numbers, colors, patterns, letters, characters, and patterns. The wrench for narrow space according to claim 1, wherein the button further has an arc hole, and the hole receives a restriction column partially fixed to the grip portion, and the limit column width is smaller than the two ends of the arc hole. The distance is limited by the swing of the dial. The wrench for a narrow space according to the first aspect of the invention, wherein the dial forms two recesses facing the grip portion, and the recess accommodates a portion of the steel ball exposing the grip portion, and the dial button is formed. The effect of positioning. A wrench for a narrow space as described in claim 1 or 2, wherein the joint structure is a polygonal sleeve hole penetrating the center of the shaft. A wrench for a narrow space as described in claim 1 or 2, wherein the joint structure is a polygonal cylinder protruding from the center of the shaft.