Connecting mechanism for tapper and handheld tool

Abstract

The utility model belongs to the technical field of handheld tools, and particularly relates to a connecting mechanism for a tapper and a handheld tool. Comprising a connecting base used for being detachably connected with a machine body; the connecting cylinder is used for mounting a working part; the connecting part is connected with the connecting seat and the connecting cylinder; wherein a first cavity used for storing a liquid medium is formed in the connecting base, a second cavity is formed in the connecting cylinder, and a liquid channel communicated with the first cavity and the second cavity is formed in the connecting part; the connecting base is provided with an adapter piston used for being matched with the machine body, and one end of the adapter piston movably seals the first cavity. The liquid passage in the connecting mechanism is isolated from the machine body to form an independent liquid passage, and the connecting mechanism can be detached from the machine body, so that the machine body can be simultaneously matched with a tapping functional part and other functional parts for use.

Description

Technical Field

[0001] The utility model belongs to the technical field of hand tools, and particularly relates to a connecting mechanism for a hole opener and a hand tool. Background Art

[0002] A hole opener (also called a reamer) is a tool that a user holds by hand and drives a working part to ream holes through an internal transmission mechanism. It is widely used in construction operations such as pipelines, electricity, construction, and decoration. According to its force application means, it can be divided into an electric hole opener, a manual hole opener, etc. A hole opener usually consists of a body part, a connecting part, and a working part. The connecting part is used to connect the working part and the body. A driving mechanism is arranged on the body, and the working part is detachably arranged on the connecting part.

[0003] For example, the applicant's prior invention patent CN103846337B discloses a universal hydraulic hole opener, which includes an oil pump body (body part) that provides hydraulic power and an oil cylinder (connecting part) used to connect with the working part. The working part can refer to a chuck assembly for a hole opener disclosed in the applicant's prior utility model patent CN209773209U. When in use, the pull rod on the chuck assembly is installed on the oil cylinder.

[0004] In the above prior art, since the connecting part (i.e., the oil cylinder) for installing the working part is fixedly installed on the oil pump body through an oil outlet joint, and the oil passage in the oil outlet joint and the connecting end of the body is an open oil inlet, that is to say, the oil in the connecting part is communicated with the oil pump oil circuit and the oil storage bag inside the body, rather than being independent. Therefore, the entire connecting part needs to be fixed together with the body and cannot be separated, so that the body can only be used with this kind of functional part, which is not conducive to other application scenarios. Summary of the Invention

[0005] To solve the above problems, the utility model provides a connecting mechanism for a hole opener with an independent internal liquid passage and capable of detaching the connecting mechanism from the machine body, and a hand tool whose body can be used to match both a hole-opening functional part and other functional parts at the same time.

[0006] The utility model adopts the following technical solutions:

[0007] A connecting mechanism for a hole opener, which is used to connect the body of the hole opener and the working component, has the following technical features, including: a connecting seat for detachably connecting with the body; a connecting cylinder for installing the working component; and a connecting part connecting the connecting seat and the connecting cylinder; wherein, a first chamber for storing a liquid medium is provided in the connecting seat, a second chamber is provided in the connecting cylinder, and a liquid passage communicating the first chamber and the second chamber is provided in the connecting part; a transfer piston for cooperating with the body is provided on the connecting seat, one end of the transfer piston movably seals the first chamber and changes the internal volume of the first chamber by moving.

[0008] In the connecting mechanism for a hole opener proposed by the present utility model, it may also have the following technical feature that the connecting part and the connecting seat are connected by a fixing member, and a first channel opening communicating the liquid passage and the first chamber is provided on one side of the connecting seat facing the connecting part.

[0009] In the connecting mechanism for a hole opener proposed by the present utility model, it may also have the following technical feature that a fixing through hole for the fixing member to pass through is provided on one side of the connecting seat facing the connecting part, a blind hole corresponding to the fixing through hole is provided on one side of the connecting part facing the connecting seat, one end of the fixing member passes through the fixing through hole and is inserted into the blind hole, and a first sealing ring is provided between the fixing member and the fixing through hole.

[0010] In the connecting mechanism for a hole opener proposed by the present utility model, it may also have the following technical feature that the connecting part forms a connecting plane fitting with the end face of the connecting seat, a medium inlet corresponding to the first channel opening is provided on the connecting plane, and an installation groove is recessed inside the periphery of the medium inlet on the connecting plane, and a second sealing ring is installed in the installation groove.

[0011] In the connecting mechanism for a hole opener proposed by the present utility model, it may also have the following technical feature that a fixing through hole for the fixing member to pass through is provided on the connecting part, a blind hole corresponding to the fixing through hole is provided on one side of the connecting seat facing the connecting part, and one end of the fixing member passes through the fixing through hole and is inserted into the blind hole.

[0012] In the connecting mechanism for a hole opener proposed by the present utility model, it may also have the following technical feature that an installation groove is provided on one side of the connecting part facing the connecting seat, an installation convex block embedded in the installation groove is protruded on one side of the connecting seat facing the connecting part, a connecting section inserted into the first channel opening is protruded on one side of the installation groove facing the connecting seat, and a third sealing ring is provided between the connecting section and the inner wall of the first channel opening.

[0013] In the connecting mechanism for the hole opener proposed by the present utility model, it may further have the following technical feature: the liquid passage includes a first passage leading to the first chamber and a second passage leading to the second chamber; the connecting part has a first connecting rod connected to the connecting seat and a second connecting rod connected to the connecting cylinder, and a first passage is provided in the first connecting rod; the second passage has a flow dividing passage A provided in the first connecting rod and a flow dividing passage B provided in the second connecting rod. Among them, the first passage is perpendicular to the flow dividing passage A, and the flow dividing passage A is perpendicular to the flow dividing passage B.

[0014] In the connecting mechanism for the hole opener proposed by the present utility model, it may further have the following technical feature: the connecting cylinder and the connecting part are connected by a connecting head, and a fourth passage communicating the second chamber and the second passage is provided in the connecting head, and a third passage opening communicating the second passage and the fourth passage is provided on the connecting part; the connecting head has: a cylinder body mounting part that extends into and is rotatably mounted on the connecting cylinder; a connecting mounting part that extends into and is mounted on the connecting part; and an exposed part that is located between the cylinder body mounting part and the connecting mounting part and is exposed outside the connecting cylinder and the connecting part; a clamping groove is provided on the side of the exposed part facing the connecting part, and a saddle spring washer is provided in the clamping groove; an insertion opening for inserting the cylinder body mounting part is provided on the connecting cylinder, and a second passage opening communicating the insertion opening and the second chamber is provided on the connecting cylinder.

[0015] In the connecting mechanism for the hole opener proposed by the present utility model, it may further have the following technical feature: a quick-release fitting part is provided on the outer periphery of the connecting seat, and the quick-release fitting part includes: n circumferentially arranged clamping fitting areas, n spaced areas spaced from the clamping fitting areas, and the span of the first spaced area in the circumferential direction is greater than or equal to the span of the clamping part in the circumferential direction; an end locking groove and an end limiting block are provided on one side of each clamping fitting area close to the end of the connecting seat. Among them, n≥1.

[0016] The present utility model also proposes a handheld tool, which has the following technical feature: it includes: a working component; a body having a mounting sleeve; and a connecting mechanism, the connecting mechanism for the hole opener as described above; the connecting cylinder is installed with the working component, and the connecting seat is detachably and rotatably installed on the mounting sleeve.

[0017] Function and effect of the utility model

[0018] According to the connecting mechanism for the hole opener and the handheld tool of the present utility model, since a connecting seat is provided, and a first chamber for storing a liquid medium is provided in the connecting seat, and a transfer piston for cooperating with the body is also provided on the connecting seat, one end of the transfer piston movably seals the first chamber and can move to change the internal volume of the first chamber, the liquid passage in the connecting mechanism is isolated from the body to form an independent liquid passage, and the connecting mechanism can be detached from the body, so that the body can be used in combination with the hole opening functional component and other functional components at the same time. Brief Description of the Drawings

[0019] Figure 1 It is a structural diagram of the connecting mechanism for the hole opener in Embodiment 1 of the present utility model.

[0020] Figure 2 It is a cross-sectional view of the connecting mechanism in Embodiment 1 of the present utility model.

[0021] Figure 3 It is a cross-sectional view of the connection structure between the connecting part and the connecting seat in Embodiment 1 of the present utility model.

[0022] Figure 4 It is a schematic diagram of the oil flow direction during the movement of the transfer piston in Embodiment 1 of the present utility model.

[0023] Figure 5 It is a schematic diagram of the structure of the connecting part in Embodiment 1 of the present utility model.

[0024] Figure 6 It is a schematic diagram of the structure of the connecting seat in Embodiment 1 of the present utility model.

[0025] Figure 7 It is a cross-sectional view of the connection structure between the connecting part and the connecting cylinder in Embodiment 1 of the present utility model.

[0026] Figure 8 It is a schematic diagram of the oil flow direction during the movement of the working piston in Embodiment 1 of the present utility model.

[0027] Figure 9 It is one of the cross-sectional views of the connection structure between the connecting part and the connecting seat in Embodiment 2 of the present utility model.

[0028] Figure 10 It is the second cross-sectional view of the connection structure between the connecting part and the connecting seat in Embodiment 2 of the present utility model.

[0029] Figure 11 It is a simplified structural diagram of the connecting part in Embodiment 2 of the present utility model.

[0030] Figure 12 It is a simplified structural diagram of the connecting seat in Embodiment 2 of the present utility model.

[0031] Reference numerals: connecting seat 1, first cavity 11, first channel opening 12, clamping and mating area 13, spacer area 14, locking groove 15, end limiting block 16, first limiting surface 171, second limiting surface 172, snap ring 18, blind hole 191, mounting projection 192, connecting cylinder 2, second cavity 21, guiding hole 22, socket 23, second channel opening 24, connecting part 3, first connecting rod 31, second connecting rod 32, connecting plane 33, mounting groove 331, second sealing ring 332, blind hole 34, medium inlet 35, third channel opening 36, oil seal 37, connecting block 38, mounting groove 381, connecting section 382, third sealing ring 383, fixing through hole 39, liquid channel 4, first channel 41, shunt channel A 42a, shunt channel B 42b, transfer piston 5, adapter 51, sealing assembly 52, oil seal 53, working piston 61, guiding column 611, working spring 62, spring seat 63, first sealing ring 71, connecting head 8, fourth channel 81, cylinder mounting part 82, connecting and mounting part 83, exposed part 84, saddle spring washer 85. Detailed implementation mode

[0032] In order to make the technical means, creative features, achieved purposes and functions realized by the present utility model easy to understand, the connecting mechanism for a hole opener and a hand tool of the present utility model will be specifically described below in conjunction with embodiments and the accompanying drawings.

[0033] It should be noted that the structures, ratios, sizes, etc. shown in the drawings of the embodiments of this specification are only used to cooperate with the content disclosed in the specification for those skilled in this technology to understand and read, and are not used to limit the limited conditions under which the present invention can be implemented. Therefore, they do not have technical essential significance. Any modification of the structure, change of the proportional relationship or adjustment of the size, without affecting the functions that the present invention can produce and the purposes that can be achieved, should still fall within the scope covered by the technical content disclosed by the present invention.

[0034] At the same time, when an element is referred to as "fixed to", "arranged on" or "connected to" another element, it can be directly on the other element or there may be an intermediate element at the same time.

[0035] In addition, the descriptions involving "first", "second", etc. in this application are only for descriptive purposes, and cannot be understood as indicating or implying their relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one such feature.

[0036] <Embodiment 1>

[0037] This embodiment provides a connecting mechanism for a hole opener, which is used to connect the body and the working component of the hole opener. Among them, the body can use a part of the body and the mounting mechanism disclosed in the applicant's prior invention patent application CN117718926 A, and the working component can use a chuck assembly for a hole opener disclosed in the applicant's prior utility model patent CN209773209U. Therefore, the body and the working component will not be specifically described herein.

[0038] Figure 1 It is a structural diagram of the connecting mechanism for the hole opener in this embodiment.

[0039] As Figure 1 shown, the connecting mechanism includes a connecting seat 1, a connecting cylinder 2, and a connecting part 3. The connecting seat 1 is used for detachably connecting with the body, the connecting cylinder 2 is used for installing the working component, and the connecting part 3 is used for connecting the connecting seat 1 and the connecting cylinder 2.

[0040] Figure 2 It is a cross-sectional view of the connecting mechanism in this embodiment.

[0041] Among them, as Figure 2 shown, a first cavity 11 for storing a liquid medium (such as oil) is provided in the connecting seat 1, a second cavity 21 is provided in the connecting cylinder 2, and a liquid channel 4 communicating the first cavity 11 and the second cavity 21 is provided in the connecting part 3. Specifically, a first channel opening 12 communicating the liquid channel 4 and the first cavity 11 is provided on one side of the connecting seat 1 facing the connecting part 3. A transfer piston 5 for cooperating with the body is further provided on the connecting seat 1. One end of the transfer piston 5 extends into the first cavity 11 to movably seal the first cavity 11 and changes the internal volume of the first cavity 11 by moving; a swivel joint 51 protrudes from the middle of the other end for cooperating with the push rod inside the body. When oil is introduced, driven by the push rod inside the body, the transfer piston 5 moves towards the end where the connecting part 3 is located, and the internal volume of the first cavity 11 gradually decreases, so that the oil in the first cavity 11 flows out along the first channel opening 12 into the liquid channel 4. In order to ensure that the oil stored in the first cavity 11 does not leak, a sealing assembly 52 is provided at the contact between the transfer piston 5 and the inner wall of the connecting seat 1, an oil seal 53 is provided at the end of the swivel joint 51, and a snap ring 18 is provided at the outer end of the connecting seat 1 to prevent the transfer piston 5 from falling out.

[0042] A working piston 61, a working spring 62 and a spring seat 63 are further arranged on the connecting cylinder 2. The working piston 61 is movably installed at the front end of the connecting cylinder 2, the spring seat 63 is fixedly installed at the rear end of the connecting cylinder 2, and the working spring 62 is pressed between the working piston 61 and the spring seat 63. When oil enters, the oil from the liquid passage 4 gradually enters the second chamber 21, which will push the working piston 61 to move towards the direction where the spring seat 63 is located, making the internal volume of the second chamber 21 gradually increase, and the working piston 61 will compress the working spring 62 to store energy. On the contrary, when oil returns, under the elastic drive of the working spring 62, the working piston 61 gradually resets, and the internal volume of the second chamber 21 gradually decreases, and the oil flows back into the liquid passage 4 under the extrusion of the working piston 61. By adopting this working piston 61, the structure is simple, which can not only save costs but also achieve light weight.

[0043] A guiding hole 22 is opened in the front end of the connecting cylinder 2 along the central axis direction. A guiding column 611 extending into the guiding hole 22 is provided at the front end of the working piston 61. The arrangement of the guiding hole 22 and the guiding column 611 can ensure that the working piston 61 can always move along the central axis of the connecting cylinder 2. In order to ensure the sealing performance of the second chamber 21, sealing components are arranged between the guiding column 611 and the inner wall of the guiding hole 22, and between the working piston 61 and the inner wall of the connecting cylinder 2.

[0044] Figure 3 It is a sectional view of the connection structure between the connecting part and the connecting seat in this embodiment.

[0045] Figure 4 It is a schematic diagram of the oil flow direction during the movement of the transfer piston in this embodiment.

[0046] Figure 5 It is a schematic diagram of the structure of the connecting part in this embodiment.

[0047] Figure 6 It is a schematic diagram of the structure of the connecting seat in this embodiment.

[0048] The connecting part 3 is L-shaped, and has a first connecting rod 31 connected to the connecting seat 1 and a second connecting rod 32 connected to the connecting cylinder 2. The first connecting rod 31 and the second connecting rod 32 are arranged perpendicular to each other. The liquid channel 4 includes a first channel 41 leading to the first chamber 11 and a second channel leading to the second chamber 21. Among them, the first channel 41 is opened in the first connecting rod 31, and the second channel has a diversion channel A42a opened in the first connecting rod 31 and a diversion channel B42b opened in the second connecting rod. The first channel 41 is perpendicular to the diversion channel A42a, and the diversion channel A42a is perpendicular to the diversion channel B42b. And the inlet of the first channel 41 is combined with the first channel port 12, and the oil flows from the first chamber 11 along the first channel port 12 into the first channel 41, and then sequentially enters the diversion channel A42a and the diversion channel B42b. Since the first channel and the second channel are opened inside the first connecting rod 31 and the second connecting rod 32, an oil seal 37 is added at the edge opening of the oil channel (as Figure 2 shown, oil seals 37 are provided at the ends of both the diversion channel B42b and the diversion channel A42a) to avoid oil leakage.

[0049] One end of the first connecting rod 31 of the connecting part 3 is connected to the second connecting rod 31, and the other end forms a flat cylindrical connecting block 38. The connecting block 38 has a connecting plane 33 that fits against the end face of the connecting seat 1. The connecting part 3 and the connecting seat 1 are connected by a fixing member 7. In this embodiment, the fixing member 7 is selected as a bolt, as Figures 3 - 6 shown, a fixing through hole 13 for one end of the fixing member 7 (bolt) to pass through is opened on one side of the connecting seat 1 facing the connecting part 3, and a blind hole 34 corresponding to the fixing through hole 13 is opened on one side of the connecting block 38 facing the connecting seat 1. One end of the fixing member 7 passes through the fixing through hole 13 and is inserted into the blind hole 34, and a first sealing ring 71 is provided between the fixing member 7 and the fixing through hole 13. The installation method of opening the blind hole 34 on the connecting block 38 makes the surface of the connecting block exposed to the outside more flat and sealed without openings, and the entire fixing member 7 is wrapped inside the connecting seat 1 and the connecting part 3, which can avoid contact with the outside air and prevent the components from being corroded.

[0050] A medium inlet 35 corresponding to the first channel port 12 is further provided on the connecting plane 33. At the same time, this medium inlet 35 is the inlet of the first channel 41, and an installation groove 331 is formed by inwards recessing on the outer periphery of the connecting plane 33 where the medium inlet 35 is located. A second sealing ring 332 is installed in the installation groove 331. As Figure 5 shown, the medium inlet 35 is opened in the center of the connecting plane 33, and there are four blind holes 34, which are arranged around the medium inlet 35. As Figure 6As shown, the first channel opening 12 is provided in the exact middle of the end face of the connecting seat 1. There are also four fixing through holes 13 corresponding to the blind holes 34, which are arranged around the first channel opening 12 to strengthen the connection between the connecting seat 1 and the connecting part 3.

[0051] As Figure 6 shown, the connecting seat 1 is generally in an approximately cylindrical shape, and a quick-release fitting part is provided on its outer surface. The quick-release fitting part includes n circumferentially arranged clamping fitting areas 13 and n spaced areas 14 spaced from the clamping fitting areas 13. Each clamping fitting area 13 is formed by a number of circumferentially arranged and parallel clamping strips / grooves for cooperating with the groove areas / strip areas provided on the inner wall of the mounting sleeve of the machine body (the specific structure can refer to the mounting main body in the prior patent CN117718926A). Taking the clamping fitting area 13 as the clamping strip and the groove area provided on the inner wall of the mounting sleeve as an example, an interval area 14 is formed between adjacent clamping strips, and a sleeve interval area is formed between adjacent groove areas. When the clamping strip is inserted into the groove, the axial movement of the connecting seat 1 and the mounting sleeve will be restricted, that is, the connecting seat 1 will not axially disengage from the mounting sleeve at this time to ensure the connection between the connecting seat 1 and the machine body; when the connecting seat 1 is rotated so that the interval area 14 is aligned with the groove, the clamping strip will be aligned with the sleeve interval area, and the connecting seat 1 can axially move relative to the mounting sleeve. During installation, first insert the interval area 14 of the connecting seat 1 along the groove area in the mounting sleeve, and then rotate the connecting seat 1 so that the clamping strip is inserted into the groove area to complete the installation. The circumferentially arranged clamping fitting areas 13 can also increase the load-bearing or offset the axial force received by the connecting seat 1 during operation to protect the connecting seat 1 from damage and extend the service life of the structure. In addition, to ensure smooth installation, the span of the interval area 14 in the circumferential direction on the outer circumference of the connecting seat 1 is greater than or equal to the span of the clamping fitting area 13 in the circumferential direction.

[0052] A locking structure is also provided on the outer peripheral surface of the connecting seat 1 near the edge, that is, a pair of end locking grooves 15, an end limiting block 16 and a limiting matching portion for matching with the limiting piece inside the mounting sleeve are provided on one side of each group of snap-fitting areas 13 near the end of the connecting seat 1, and the end locking groove 15 is a concave structure with a low middle and high sides; along the outer edge of the end of the connecting seat 1, an end limiting block 16 is provided at a certain distance from the end locking groove 15, and the limiting matching portion is a first limiting surface 171 formed on the side of the end locking groove 15 of the end limiting block 16 facing the other group, and a second limiting surface 172 formed on the side of the end locking groove 15 facing the other group. When the connecting seat 1 is rotated on the mounting sleeve, once the limiting piece inside the mounting sleeve is rotated to abut against the first limiting surface 171 or the second limiting surface 172, it can no longer continue to rotate in the same direction. During installation, when the connection base 1 is rotated in the installation sleeve until the limit member abuts against the first limit surface 171, the connection base 1 cannot continue to rotate in the same direction. At the same time, the snap-fitting area 13 also fits with the slot area.

[0053] Figure 7 It is a cross-sectional view of the connection structure between the connection portion and the connection cylinder of this embodiment.

[0054] Figure 8 It is a schematic diagram of the oil flow direction during the movement of the working piston of this embodiment.

[0055] like Figure 1 and Figure 2 As shown, the connecting cylinder 2 and the connecting part 3 are connected through a connecting head 8, a fourth channel 81 connecting the second chamber 21 and the branch channel B42b of the second channel is opened in the connecting head 8, and a third channel opening 36 connecting the branch channel B42b of the second channel and the fourth channel 81 is opened on the connecting part 3. Specifically, as Figure 7 and Figure 2 As shown, the connecting head 8 has an integrally arranged cylinder body mounting portion 82, a connecting mounting portion 83 and an exposed portion 84. The cylinder body mounting portion 82 extends into and is rotatably mounted on the connecting cylinder 2. When working, the connecting cylinder 2 can rotate 360° relative to the connecting portion 3 with the axis of the connecting head 8 as the axis, so as to facilitate the use requirements at different angles. The connecting mounting portion 83 extends into and is mounted on the connecting portion 3, and the exposed portion 84 is located between the cylinder body mounting portion 82 and the connecting mounting portion 83, and is exposed to the connecting cylinder 2 and the connecting portion 3. A slot is provided on the exposed portion 84 on one side facing the connecting portion 3, and a saddle-shaped spring washer 85 is provided in the slot. The saddle-shaped spring washer 85 is built into the connecting head 8, and the structure is compact and beautiful. A socket 23 for inserting the cylinder body mounting portion 82 is provided on the connecting cylinder 2, and a second channel opening 24 connecting the socket 23 and the second cavity 21 is provided on the connecting cylinder 2. As shown Figure 8As shown, the oil from the runner B42b enters the fourth channel 81 through the third channel opening 36, then enters the socket 23, and enters the second chamber 21 from the second channel opening 24. The oil entering the second chamber 21 can push the working piston 61 towards the side where the spring seat 63 is located. The connecting cylinder 2 is made of chromium material, which has high hardness and light weight, ensuring the hardness of the connecting cylinder 2 and achieving weight reduction and lightweighting.

[0056] The oil inlet process of the present utility model:

[0057] As Figure 4 and Figure 8 shown, driven by the push rod inside the body, the adapter piston 5 moves towards the end where the connecting portion 3 is located, and the internal volume of the first chamber 11 gradually decreases, causing the oil in the first chamber 11 to flow out along the first channel opening 12 into the first channel 41, then along the second channel through the third channel opening 36 into the fourth channel 81, then into the socket 23, and into the second chamber 21 from the second channel opening 24. The oil entering the second chamber 21 can push the working piston 61 towards the side where the spring seat 63 is located.

[0058] The oil outlet process of the present utility model:

[0059] Driven by the elasticity of the working spring 62, the working piston 61 gradually resets, and the internal volume of the second chamber 21 gradually decreases. The oil is squeezed by the working piston 61 and enters the socket 23 from the second channel opening 24, then flows out along the fourth channel 81 to the second channel and the first channel until it returns to the first chamber 11, pushing the adapter piston 5 back to its original position.

[0060] <Embodiment 2>

[0061] Figure 9 and Figure 10 are the cross-sectional views of the connection structure between the connecting portion and the connecting seat in this embodiment.

[0062] Figure 11 is the structural schematic diagram of the connecting portion in this embodiment.

[0063] Figure 12 is the structural schematic diagram of the connecting seat in this embodiment.

[0064] This embodiment is basically the same as the above Embodiment 1, except for the installation method between the connecting portion 3 and the connecting seat 1. As Figures 9 - 12 shown, a fixing through hole 39 for the fixing member 7 to pass through is provided on the connecting block 38 of the connecting portion 3, and a blind hole 191 corresponding to the fixing through hole 39 is provided on the side of the connecting seat 1 facing the connecting block 38. One end of the fixing member 7 passes through the fixing through hole 39 and is inserted into the blind hole 191 to fix the connecting seat 1 and the connecting block 38. As Figure 11As shown in the figure, an installation groove 381 is formed on one side of the connecting block 38 facing the connecting seat 1. On one side of the connecting seat 1 facing the connecting portion 3, an annular installation projection 192 that is inserted into the installation groove 381 protrudes. A first channel opening 12 is formed in the middle of the installation projection 192. Blind holes 191 are formed on this installation projection and are distributed on the outer periphery of the first channel opening 12. A connecting section 382 that is inserted into the first channel opening 12 protrudes from the middle of the installation groove 381 on the side facing the connecting seat 1. A first channel 41 is formed in the connecting section 382. A third sealing ring 383 is provided between the outer periphery of the connecting section 382 and the inner wall of the first channel opening 12. This method is more convenient for opening holes and has a lower cost compared to the connection method in Embodiment 1.

[0065] <Embodiment 3>

[0066] This embodiment provides a hole opener, which includes a machine body, a connection mechanism, and a working component. Among them, the connection mechanism is the connection mechanism in Embodiment 1 or 2 above. A working component is detachably arranged on the connection cylinder 2 of the connection mechanism. The connection seat 1 is detachably installed on the machine body, and the connection seat 1 can rotate relative to the drive mechanism of the machine body with the installation sleeve of the machine body around the central axis of the connection seat 1, and the rotation angle is 350°. And the rotation axis at the connection seat 1 is perpendicular to the rotation axis at the connection cylinder 2.

[0067] <Embodiment 4>

[0068] This embodiment provides a handheld tool, which includes a machine body and a functional component. Among them, the functional component can be a combination of a connection mechanism + a working component for opening holes as in Embodiments 1-3 above, or a component with other functions such as crimping and shearing. An installation sleeve is provided at the front end of the machine body. The functional component is detachably replaceably arranged on the installation sleeve. Taking the combination of a connection mechanism + a working component for opening holes as an example, the connection seat 1 of the connection mechanism is rotatably and detachably arranged on the installation sleeve. In different construction scenarios, the functional component can be directly replaced.

[0069] The above embodiments are only used to illustrate the specific implementation manners of the present invention, and the present invention is not limited to the description scope of the above embodiments.

Claims

1. Connecting mechanism for hole opener, used for connecting the body of the hole opener and the working component, characterized in that Comprising: A connecting base for detachably connecting with the body; A connecting cylinder for mounting the working component; and A connecting part connecting the connecting base and the connecting cylinder; Wherein, a first chamber for storing a liquid medium is provided in the connecting base, a second chamber is provided in the connecting cylinder, and a liquid passage communicating the first chamber and the second chamber is provided in the connecting part; A transfer piston for cooperating with the body is provided on the connecting base, and one end of the transfer piston movably seals the first chamber.

2. The connecting mechanism for a hole opener according to claim 1, characterized in that, The connecting part and the connecting base are connected by a fixing member, and a first passage opening communicating the liquid passage and the first chamber is provided on one side of the connecting base facing the connecting part.

3. The connecting mechanism for the hole opener according to claim 2, characterized in that, A fixing through hole for the fixing member to pass through is provided on one side of the connecting base facing the connecting part, a blind hole corresponding to the fixing through hole is provided on one side of the connecting part facing the connecting base, one end of the fixing member passes through the fixing through hole and is inserted into the blind hole, and a first sealing ring is provided between the fixing member and the fixing through hole.

4. The connecting mechanism for the hole opener according to claim 3, wherein, The connecting part forms a connecting plane fitting with the end face of the connecting base, a medium inlet corresponding to the first passage opening is provided on the connecting plane, and an installation groove is recessed on the outer periphery of the medium inlet on the connecting plane, and a second sealing ring is installed in the installation groove.

5. The connecting mechanism for the hole opener according to claim 2, characterized in that, A fixing through hole for the fixing member to pass through is provided on the connecting part, a blind hole corresponding to the fixing through hole is provided on one side of the connecting base facing the connecting part, and one end of the fixing member passes through the fixing through hole and is inserted into the blind hole.

6. The connecting mechanism for a hole opener according to claim 5, characterized in that, An installation groove is provided on one side of the connecting part facing the connecting base, an installation protrusion inserted into the installation groove is formed on one side of the connecting base facing the connecting part, a connecting section inserted into the first passage opening is protruded on one side of the installation groove facing the connecting base, and a third sealing ring is provided between the connecting section and the inner wall of the first passage opening.

7. The connecting mechanism for the hole opener according to any one of claims 1-6, characterized in that, The liquid passage includes a first passage leading to the first chamber and a second passage leading to the second chamber; The connecting part has a first connecting rod connected to the connecting base and a second connecting rod connected to the connecting cylinder, and the first passage is provided in the first connecting rod; The second passage has a diversion channel A provided in the first connecting rod and a diversion channel B provided in the second connecting rod, Wherein, the first passage is perpendicular to the diversion channel A, and the diversion channel A is perpendicular to the diversion channel B.

8. The connecting mechanism for a hole opener according to claim 7, characterized in that, The connecting cylinder and the connecting part are connected by a connecting head, a fourth passage communicating the second chamber and the second passage is provided in the connecting head, and a third passage opening communicating the second passage and the fourth passage is provided on the connecting part; The connecting head has: A cylinder mounting part extending into and rotatably mounted on the connecting cylinder; A connecting mounting part extending into and mounted on the connecting part; and An exposed part located between the cylinder mounting part and the connecting mounting part and exposed outside the connecting cylinder and the connecting part; A clamping groove is provided on one side of the exposed part facing the connecting part, and a saddle spring washer is provided in the clamping groove; The connecting cylinder is provided with a socket for inserting the cylinder body mounting portion, and the connecting cylinder is provided with a second passage opening communicating the socket with the second chamber.

9. The connecting mechanism for a hole opener according to any one of claims 1-6, characterized in that, The outer periphery of the connecting seat is provided with a quick-release fitting portion, and the quick-release fitting portion includes: n circumferentially arranged clamping fitting areas, n spaced areas spaced from the clamping fitting areas, The span of the spaced area in the circumferential direction is greater than or equal to the span of the clamping fitting area in the circumferential direction; One side of each clamping fitting area close to the end of the connecting seat is provided with an end locking groove and an end limiting block; Wherein, n≥1.

10. Handheld tool, characterized in that, Comprising: A working component; A machine body having a mounting sleeve; And A connecting mechanism, the connecting mechanism for a hole opener as described in any one of claims 1-9; The connecting cylinder is mounted with the working component, and the connecting seat is detachably and rotatably mounted on the mounting sleeve.

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