Connecting rod of tapper

Abstract

The utility model discloses a tapper connecting rod which comprises a rotating handle assembly and a tapping assembly, the rotating handle assembly comprises a drill bit limiting sleeve and a limiting mechanism, the tapping assembly comprises a quick conversion head, a positioning drill bit and a cylindrical tapper, and the limiting mechanism comprises a limiting steel ball and a sliding sleeve; a first limiting hole is formed in the drill bit limiting sleeve, the limiting steel ball is installed in the first limiting hole in a matched mode, a first positioning groove is formed in the lower end of the quick conversion head, and the limiting steel ball and the first positioning groove are matched for limiting. A first limiting part and a second limiting part are arranged on the inner side wall of the sliding sleeve, and the sliding sleeve moves in the axial direction of the drill bit limiting sleeve, so that the first limiting part and the second limiting part are matched with the limiting steel balls correspondingly, and the drill bit limiting sleeve and the quick conversion head are locked or unlocked; the positioning drill bit and the cylindrical tapper can be easily detached and pulled out, and the purpose of rapidly withdrawing waste materials or rapidly replacing the cylindrical tapper is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of hole openers, in particular to a hole opener connecting rod. Background Art

[0002] A hole opener is a circular saw that is used to cut circular holes. It can be used to open holes in metal, wood, plastic, glass and other materials. It is easy to operate and carry, and has a wide range of uses.

[0003] The existing hole opener is mainly composed of a rotating handle and a hole opener body. The rotating handle and the hole opener body are generally connected together by a thread. If the hole opener body needs to be replaced, the original hole opener screw must be unscrewed first, and then the new hole opener body must be installed. However, since the hole opener body has been drilled, the threads may slip or get stuck, making it difficult to disassemble. It is also difficult to quickly clean out the waste inside the hole opener body. Utility Model Content

[0004] The purpose of the utility model is to provide a hole opener connecting rod, the quick conversion head and the cylindrical hole opener can be easily disassembled and pulled out together, and the positioning center drill can be quickly locked and released, so as to achieve the purpose of quickly returning waste materials or quickly replacing the cylindrical hole opener.

[0005] The utility model is achieved through the following technical solutions:

[0006] The drill bit limiter is an upper end part of the drill bit limiter, and the lower end of the drill bit limiter is an upper end part of the drill bit limiter, and the lower end of the drill bit limiter is an upper end part of the drill bit limiter. A limiting hole, the limiting steel ball is fitted in the first limiting hole, the lower end of the quick-change head is provided with a first positioning groove, and the limiting steel ball cooperates with the first positioning groove for limiting; a first limiting portion and a second limiting portion are provided on the inner side wall of the sliding sleeve, the inner diameter of the first limiting portion is smaller than the inner diameter of the second limiting portion, and the sliding sleeve is movably sleeved on the drill bit limiting sleeve along the axial direction of the drill bit limiting sleeve; the sliding sleeve moves axially along the drill bit limiting sleeve, so that the first limiting portion and the second limiting portion respectively cooperate with the limiting steel ball to form a locked state and an unlocked state so that the drill bit limiting sleeve and the quick-change head are locked or unlocked; the positioning drill bit is installed on the quick-change head or the drill bit limiting sleeve through a clamp assembly.

[0007] The top end of the drill bit limiter is connected with the drill bit limiter by the threaded cannula, and the threaded cannula is connected with the threaded cannula at the bottom end. The ball is fitted in the first limiting hole; the quick-changing head is provided with a first positioning groove, and the limiting steel ball cooperates with the first positioning groove for limiting; the upper cover is fixedly connected to the drill limit sleeve; when the sliding sleeve is pulled backward along the axial direction of the drill limit sleeve, the upper inner circular side wall leaves the limiting steel ball so that the limiting steel ball has an air-avoiding space to reach an unlocked state, and at the same time, the quick-changing head is ejected by the ejection mechanism; when the sliding sleeve is reset to the normal position by the reset assembly, and the limiting steel ball is in the matching position of the upper inner circular side wall, the limiting steel ball cooperates with the upper inner circular side wall to lock and reach a locked state; the locking state and the unlocking state are formed by the cooperation of the limiting steel ball and the sliding sleeve so that the drill limit sleeve and the quick-changing head are locked or unlocked; the positioning drill bit is installed on the quick-changing head or the drill limit sleeve through the clamp assembly.

[0008] As a further improvement to the technical solution of the present invention, the positioning drill bit is installed on the quick-conversion head through a clamping hoop assembly; the clamping hoop assembly includes a steel ball hoop and a clamping steel ball; a clamping slot is provided at the lower end of the quick-conversion head; a first clamping through hole is provided on the side wall of the clamping slot; one end of the steel ball hoop is open; a second clamping through hole is provided on the side wall of the steel ball hoop corresponding to the first clamping through hole; a second positioning slot is provided at the lower end of the positioning drill bit; after the steel ball hoop is clamped to the clamping slot of the quick-conversion head, the clamping steel ball is clamped to the second positioning slot through the second clamping through hole and the first clamping through hole in turn.

[0009] As a further improvement of the technical solution of the present invention, the positioning drill bit is installed on the drill bit limiting sleeve through a clamping hoop assembly; the clamping hoop assembly includes a steel ball hoop, a clamping steel ball and a steel ball hoop fixing sleeve; a clamping slot is provided at the lower end of the drill bit limiting sleeve; a first clamping through hole is provided on the side wall of the clamping slot; one end of the steel ball hoop is open; a second clamping through hole is provided on the side wall of the steel ball hoop corresponding to the first clamping through hole; a second positioning slot is provided at the lower end of the positioning drill bit; after the steel ball hoop is clamped in the clamping slot of the drill bit limiting sleeve, the clamping The tightening steel ball is clamped to the second positioning groove through the second clamping through hole and the first clamping through hole in sequence; a third limiting part and a fourth limiting part are provided on the inner side wall of the steel ball hoop fixing sleeve; the inner diameter of the third limiting part is smaller than the inner diameter of the fourth limiting part; the steel ball hoop fixing sleeve is movably sleeved on the drill bit limiting sleeve along the axial direction of the drill bit limiting sleeve; the sliding sleeve moves axially along the drill bit limiting sleeve, so that the third limiting part and the fourth limiting part respectively cooperate with the clamping steel ball to form a locked state and an unlocked state so that the drill bit limiting sleeve and the positioning drill bit are locked or unlocked.

[0010] As a further improvement of the technical solution of the present utility model, the clamp assembly also includes a first clamping spring and a second clamping spring; the drill bit limit sleeve is respectively provided with a first ring groove and a second ring groove; the first clamping spring is clamped in the first ring groove; the second clamping spring is clamped in the second ring groove; a limiting ring is provided inside the upper end of the steel ball clamp fixing sleeve; the limiting ring moves along the axial direction of the drill bit limit sleeve, so that the limiting ring is respectively limited and cooperated with the first clamping spring and the second clamping spring.

[0011] As a further improvement to the technical solution of the present utility model, a clamping protrusion is provided on the steel ball hoop; a U-shaped groove is provided on the quick conversion head or the drill bit limiting sleeve; and the clamping protrusion is engaged with the U-shaped groove.

[0012] As a further improvement to the technical solution of the present invention, the limiting mechanism also includes a positioning member for limiting the downward displacement of the sliding sleeve; the positioning member is installed on the outer side wall of the lower end of the drill bit limiting sleeve through a first C-shaped retaining ring.

[0013] As a further improvement to the technical solution of the present invention, an elastic component is contained in the sliding sleeve, and the elastic component is axially movably sleeved on the outer circle of the drill limit sleeve, and the upper end of the elastic component abuts against the lower end surface of the first limiting part; the lower end of the elastic component abuts against the upper surface of the positioning member.

[0014] As a further improvement of the technical solution of the present invention, the reset assembly includes a positioning pin and a reset spring; the positioning pin passes through the drill limit sleeve and the upper cover in sequence; the lower end of the positioning pin is knurled and riveted to the sliding sleeve; the reset spring is sleeved on the positioning pin; a limiting end is provided at the upper end of the positioning pin; the upper end of the reset spring abuts against the limiting end; the lower end of the reset spring abuts against the inner hole of the upper cover; when the sliding sleeve is pulled backward along the axial direction of the drill limit sleeve, the reset spring is in a compressed state.

[0015] As a further improvement of the technical solution of the present invention, the ejection mechanism includes an ejection block, an ejection spring and a spring fixing ring; the ejection spring is installed in the first accommodating cavity through the spring fixing ring; one end of the ejection block abuts against the ejection spring, and the other end abuts against the quick conversion head.

[0016] As a further improvement to the technical solution of the present utility model, the upper cover is fixedly connected to the drill limit sleeve by screws.

[0017] As a further improvement to the technical solution of the present invention, two positioning planes are symmetrically provided at the opening of the first accommodating cavity.

[0018] As a further improvement to the technical solution of the present invention, a chip removal groove is provided on the side wall of the cylindrical hole opener.

[0019] In summary, the present invention has the following beneficial effects:

[0020] The quick-changing head and the cylindrical hole opener can be easily pulled downward together, so as to realize the purpose of quickly withdrawing waste materials or quickly replacing the cylindrical hole opener. Alternatively, when the sliding sleeve is pulled back in the axial direction of the drill bit limiting sleeve, the upper inner circular side wall leaves the limiting steel ball, so that the limiting steel ball has an air-avoiding space to reach an unlocked state, and at the same time, the quick conversion head is ejected by the ejection mechanism; when the sliding sleeve is reset to the normal position by the reset assembly, when the limiting steel ball is in the matching position of the upper inner circular side wall, the limiting steel ball and the upper inner circular side wall are locked to reach a locked state; the locking state and the unlocking state are formed by the matching of the limiting steel ball and the sliding sleeve, so that the drill bit limiting sleeve quick conversion head is locked or unlocked; the quick conversion head and the cylindrical hole opener can be easily pulled downward together, achieving the purpose of quickly withdrawing waste materials or quickly replacing the cylindrical hole opener. The utility model controls the rapid locking and release of the positioning drill bit by providing a steel ball hoop fixing sleeve, a steel ball hoop and a clamping steel ball, which is more convenient and efficient than the conventional method of locking the positioning drill bit with a fastening screw. The utility model is easy to use, has a good user experience effect, is novel in structure, has a low production cost, has good economic benefits, and can be widely promoted. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a schematic diagram of the overall structure of a hole opener connecting rod according to embodiment 1 of the present invention;

[0022] Figure 2 This is a schematic top view of the structure of a hole opener connecting rod according to embodiment 1 of the present invention;

[0023] Figure 3 yes Figure 2 AA cross-sectional view;

[0024] Figure 4 This is a schematic diagram of the exploded structure of a hole opener connecting rod in Example 1 of the present utility model;

[0025] Figure 5 This is a schematic diagram of the three-dimensional structure of the sliding sleeve of Example 1 of the present utility model;

[0026] Figure 6 This is a schematic diagram of the three-dimensional structure of the drill bit limiting sleeve of Example 1 of the present utility model;

[0027] Figure 7 This is a schematic diagram of the three-dimensional structure of the positioning drill bit of Example 1 of the present utility model;

[0028] Figure 8 This is a schematic structural diagram of the assembly of a quick-change head and a steel ball clamp in Example 1 of the present utility model;

[0029] Figure 9 This is a schematic diagram of the three-dimensional structure of the quick-change head of Example 1 of the present utility model;

[0030] Figure 10 This is a schematic diagram of the three-dimensional structure of the steel ball hoop of Example 1 of the present utility model;

[0031] Figure 11 This is a schematic diagram of the overall structure of a hole opener connecting rod according to embodiment 2 of the present utility model;

[0032] Figure 12 This is a schematic top view of the structure of a hole opener connecting rod according to embodiment 2 of the present invention;

[0033] Figure 13 yes Figure 11 BB cross-sectional view;

[0034] Figure 14 This is a schematic diagram of the exploded structure of a hole opener connecting rod according to Example 2 of the present utility model;

[0035] Figure 15 This is a schematic diagram of the three-dimensional structure of the drill bit limiting sleeve of Example 2 of the present utility model;

[0036] Figure 16 This is a schematic diagram of the three-dimensional structure of the positioning drill bit of Example 2 of the present utility model;

[0037] Figure 17 This is a schematic diagram of the three-dimensional structure of the sliding sleeve of Example 2 of the present utility model;

[0038] Figure 18 This is a schematic diagram of the three-dimensional structure of the upper cover of Example 2 of the present utility model;

[0039] Figure 19 This is a schematic diagram of the three-dimensional structure of the cylindrical hole opener of Example 2 of the present utility model;

[0040] Figure 20 This is a schematic diagram of the overall structure of a hole opener connecting rod according to embodiment 3 of the present invention;

[0041] Figure 21 This is a schematic top view of the structure of a hole opener connecting rod according to embodiment 3 of the present invention;

[0042] Figure 22 yes Figure 21 CC cross-sectional view;

[0043] Figure 23 This is a schematic diagram of the exploded structure of a hole opener connecting rod according to embodiment 3 of the present utility model;

[0044] Figure 24 This is a schematic diagram of the three-dimensional structure of the drill bit limiting sleeve of Example 3 of the present utility model;

[0045] Figure 25 This is a schematic diagram of the assembly structure of the positioning drill bit, the steel ball hoop fixing sleeve and the drill bit limiting sleeve in Example 3 of the present utility model;

[0046] Figure 26 This is a schematic diagram of the three-dimensional structure of the steel ball hoop fixing sleeve of Example 3 of the present utility model;

[0047] Figure 27 This is a schematic diagram of the assembly structure of the steel ball hoop, the first and second retaining springs, and the drill bit limiting sleeve in Example 3 of the present utility model;

[0048] Figure 28 This is a schematic diagram of the three-dimensional structure of the positioning drill bit of Example 3 of the present utility model;

[0049] Figure 29 It is a schematic diagram of the three-dimensional structure of the quick conversion head of Example 3 of the present utility model.

[0050] In the accompanying drawings: 400 - elastic component; 1 - handle assembly; 2 - hole opening assembly; 3 - ejection mechanism; 4 - reset assembly; 5 - clamp assembly; 7 - screw; 11 - drill bit limiting sleeve; 12 - limiting mechanism; 21 - quick-change head; 22 - cylindrical hole opener; 23 - positioning drill bit; 31 - ejection block; 32 - ejection spring; 33 - spring fixing ring; 41 - positioning pin; 42 - reset spring; 51 - steel ball clamp; 52 - clamping steel ball; 53 - steel ball clamp fixing sleeve; 54 - first retaining spring; 55 - second retaining spring; 111 - first accommodating chamber; 112 - first limiting hole; 113 - first annular groove; 114-second ring groove; 121-limiting steel ball; 122-sleeve; 123-upper cover; 124-positioning piece; 125-first C-type retaining ring; 211-first positioning groove; 212-retaining groove; 213-first clamping hole; 214-U-shaped groove; 221-chip groove; 231-second positioning groove; 511-second clamping hole; 512-retaining protrusion; 531-third limiting part; 532-fourth limiting part; 533-limiting ring; 1111-positioning plane; 1221-first limiting part; 1222-second limiting part; 1223-upper inner circular side wall; 1224-lower inner circular side wall. DETAILED DESCRIPTION

[0051] The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments. The exemplary embodiments and descriptions of the present invention are used to explain the present invention, but are not intended to limit the present invention.

[0052] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back, upper end, lower end, top, bottom...) are only used to explain the relative position relationship, movement status, etc. between the various components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0053] In this utility model, unless otherwise specified or limited, the term "connection" should be understood in a broad sense. For example, "connection" can mean fixed connection, detachable connection, or integration; it can mean mechanical connection or electrical connection; it can mean direct connection or indirect connection through an intermediate medium; it can mean internal communication between two elements or interaction between two elements, unless otherwise specified. For those skilled in the art, the specific meanings of the above terms in this utility model can be understood according to specific circumstances.

[0054] In addition, the terms "first," "second," and so on, used in this utility model are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly indicating the number of the technical features indicated. Therefore, features defined as "first" or "second" may explicitly or implicitly include at least one such feature. Furthermore, the technical solutions of various embodiments may be combined with each other, but only on the basis that they can be implemented by a person of ordinary skill in the art. If the combination of technical solutions contradicts or cannot be implemented, it shall be deemed that such combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0055] The following is combined with Figure 1-29 The utility model is described in further detail.

[0056] Example 1:

[0057] like Figures 1 to 10As shown, a hole opener connecting rod comprises a rotating handle assembly 1 and a hole opening assembly 2, the upper end of the rotating handle assembly 1 is detachably connected to the hole opening assembly 2, and the lower end of the rotating handle assembly 1 is connected to the driving assembly to drive the hole opening assembly 2 to rotate; wherein: the rotating handle assembly 1 comprises a drill bit limiting sleeve 11 and a limiting mechanism 12, and the hole opening assembly 2 comprises a quick-changing head 21, a positioning drill bit 23 and a cylindrical hole opener 22, and the limiting mechanism 12 comprises a limiting steel ball 121 and a sliding sleeve 122; the upper end of the drill bit limiting sleeve 11 is provided with a first accommodating cavity 111 which is mounted in cooperation with the lower end of the quick-changing head 21; the first accommodating cavity 111 is provided with an ejection mechanism 3; the upper end thread of the quick-changing head 21 is connected to the cylindrical hole opener 22 to form a whole; the drill bit limiting sleeve 11 is provided with a first limiting hole 112 which passes through the side wall of the first accommodating cavity 111, and the limiting The steel ball 121 is installed in the first limiting hole 112, and the lower end of the quick-changing head 21 is provided with a first positioning groove 211, and the limiting steel ball 121 cooperates with the first positioning groove 211 to limit; the inner side wall of the sliding sleeve 122 is provided with a first limiting portion 1221 and a second limiting portion 1222, and the inner diameter of the first limiting portion 1221 is smaller than the inner diameter of the second limiting portion 1222, and the sliding sleeve 122 is movably sleeved on the drill bit limiting sleeve 11 along the axial direction of the drill bit limiting sleeve 11; the sliding sleeve 122 moves axially along the drill bit limiting sleeve 11, so that the first limiting portion 1221 and the second limiting portion 1222 respectively cooperate with the limiting steel ball 121 to form a locked state and an unlocked state so that the drill bit limiting sleeve 11 and the quick-changing head 21 are locked or unlocked; the positioning drill bit 23 is installed on the quick-changing head 21 or the drill bit limiting sleeve 11 through the clamp assembly 5.

[0058] It should be noted that the drill bit limiting sleeve 11 (main body) is installed in conjunction with the quick-change head 21, and the quick-change head 21 is connected to the cylindrical hole opener 22 to form an integral body; the drill bit limiting sleeve 11 is provided with a first limiting hole 112 for fitting a limiting steel ball 121, the quick-change head 21 is provided with a first positioning groove 211 that cooperates with the limiting steel ball 121, and the sliding sleeve 122 is provided with a first limiting portion 1221 and a second limiting portion 1222. The sliding sleeve 122 is provided on the drill bit limiting sleeve 11, and the sliding sleeve 122 moves axially along the drill bit limiting sleeve 11, so that the first limiting portion 1221 and the second limiting portion 1222 respectively cooperate with the limiting steel ball 121 to form a locked state and an unlocked state. By connecting the quick-change head 21 and the cylindrical hole opener 22 to form an integral body, the quick-change head 21 and the cylindrical hole opener 22 are pulled out together after the hole opening is completed, thereby achieving the purpose of quickly returning waste or quickly replacing the hole opener.

[0059] It should be noted that the utility model forms a whole by connecting the quick-changing head 21 with the cylindrical hole opener 22. The quick-changing head 21, the drill bit limiting sleeve 11 and the sliding sleeve 122 are matched and connected. After the hole opening processing is completed, the sliding sleeve 122 is pulled backward along the axial direction of the drill bit limiting sleeve 11. When the first limiting portion 1221 is matched with the limiting steel ball 121, the limiting steel ball 121 is matched with the first positioning groove 211 to lock. When the second limiting portion 1222, the first limiting hole 112 and the first positioning groove 211 are located on the same straight line, the limiting steel ball 121 is matched with the second limiting portion 1222. The limiting steel ball 121 and the first positioning groove 211 are in an unlocked state, and the cylindrical hole opener 22 is pulled downward. The limiting steel ball 121 partially passes through the first limiting hole 112 and slides to the second limiting portion 1222 to disengage from the first positioning groove 211. When the sliding sleeve 122 returns to its normal position, the limiting steel ball 121 is located at the inner diameter position of the first limiting portion 1221 to cooperate with the locking quick-change head 21. When the sliding sleeve 122 is pulled back, the limiting steel ball 121 is located at the inner diameter position of the second limiting portion 1222, so that the limiting steel ball 121 has space to escape and unlock the quick-change head 21, so that the quick-change head 21 is ejected by the ejection mechanism 3 for better removal and replacement of the cylindrical hole opener 22. The quick-change head 21 and the cylindrical hole opener 22 can be easily pulled downward together, achieving the purpose of quickly returning waste or quickly replacing the cylindrical hole opener 22. The clamp assembly 5 is provided to control the rapid locking and release of the positioning drill bit 23, which is more convenient and efficient than the conventional use of a set screw to lock the positioning drill bit 23.

[0060] Specifically, in this embodiment, the positioning drill bit 23 is installed on the quick-conversion head 21 through the clamping hoop assembly 5; the clamping hoop assembly 5 includes a steel ball hoop 51 and a clamping steel ball 52; a clamping slot 212 is provided at the lower end of the quick-conversion head 21; a first clamping through hole 213 is provided on the side wall of the clamping slot 212; one end of the steel ball hoop 51 is open; a second clamping through hole 511 is provided on the side wall of the steel ball hoop 51 corresponding to the first clamping through hole 213; a second positioning groove 231 is provided at the lower end of the positioning drill bit 23; after the steel ball hoop 51 is clamped to the clamping slot 212 of the quick-conversion head 21, the clamping steel ball 52 is clamped to the second positioning groove 231 through the second clamping through hole 511 and the first clamping through hole 213 in turn. It should be noted that when the positioning drill bit 23 needs to be installed on the quick conversion head 21, the positioning drill bit 23 is first inserted into the quick conversion head 21, and then the steel ball hoop 51 is clamped on the clamping slot 212, and then the clamping steel ball 52 is inserted from the second clamping through hole 511. The clamping steel ball 52 passes through the second clamping through hole 511 and the first clamping through hole 213 in turn and enters the quick conversion head 21. At this time, the clamping steel ball 52 is clamped on the second positioning groove 231 to achieve the clamping of the positioning drill bit 23. The positioning drill bit 23 is quickly locked and released by setting the steel ball hoop 51 and the clamping steel ball 52, which is more convenient and efficient than the conventional use of fastening screws to lock the positioning drill bit 23.

[0061] Specifically, in this embodiment, the steel ball clamp 51 is provided with a locking protrusion 512; the quick-change head 21 or the drill stop sleeve 11 is provided with a U-shaped groove 214; and the locking protrusion 512 engages with the U-shaped groove 214. It should be noted that by providing the locking protrusion 512 to engage with the U-shaped groove 214, the steel ball clamp 51 is prevented from rotating and shifting, which would affect the accuracy and efficiency of hole opening, and the positioning drill bit 23 is securely mounted on the quick-change head 21 or the drill stop sleeve 11. The positioning drill bit 23 also serves to position and guide the cylindrical hole opener 22 when opening a hole, thereby improving hole opening accuracy.

[0062] Specifically, in this embodiment, the limiting mechanism 12 further includes a positioning member 124 for limiting the downward displacement of the sliding sleeve 122; the positioning member 124 is installed on the outer side wall of the lower end of the drill bit limiting sleeve 11 through a first C-shaped retaining ring 125.

[0063] Specifically, in this embodiment, the sliding sleeve 122 contains an elastic component 400, which is axially movably sleeved on the outer circumference of the drill stop sleeve 11. The upper end of the elastic component 400 abuts the lower end surface of the first stop portion 1221, and the lower end of the elastic component 400 abuts the upper surface of the positioning member 124. It should be noted that the upper surface of the positioning member 124 supports the elastic component 400, and the tension of the elastic component 400 is used to reset the sliding sleeve 122 after unlocking. The positioning member 124 limits the downward displacement of the sliding sleeve 122 and guides the inner sidewall of the sliding sleeve 122, making the axial movement of the sliding sleeve 122 along the drill stop sleeve 11 smoother, easier to operate, and more compact.

[0064] Specifically, in this embodiment, the ejection mechanism 3 includes an ejection block 31, an ejection spring 32, and a spring retaining ring 33. The ejection spring 32 is mounted within the first accommodating chamber 111 via the spring retaining ring 33. One end of the ejection block 31 abuts against the ejection spring 32, and the other end abuts against the quick-change head 21. It should be noted that when the sliding sleeve 122 is pulled rearward along the axial direction of the drill stop sleeve 11, the ejection block 31 enters the unlocked state, at which point the ejection block 31 pushes the quick-change head 21 axially out, facilitating removal of the drilling assembly 2.

[0065] Specifically, in this embodiment, two positioning planes 1111 are symmetrically provided at the opening of the first accommodating cavity 111 to facilitate the positioning and installation of the quick conversion head 21 .

[0066] Specifically, in this embodiment, a chip removal groove 221 is provided on the side wall of the cylindrical hole opener 22 to facilitate the discharge of waste chips, thereby improving the hole opening accuracy and work efficiency.

[0067] Example 2: Figures 11 to 19As shown, a hole opener connecting rod includes a handle assembly 1 and a hole opening assembly 2. The upper end of the handle assembly 1 is detachably connected to the hole opening assembly 2, and the lower end of the handle assembly 1 is connected to a driving assembly to drive the hole opening assembly 2 to rotate; wherein: the handle assembly 1 includes a drill bit limiting sleeve 11 and a limiting mechanism 12, the hole opening assembly 2 includes a quick-change head 21, a positioning drill bit 23 and a cylindrical hole opener 22; the limiting mechanism 12 includes a limiting steel ball 121, a sliding sleeve 122 and an upper cover 123; the upper end of the drill bit limiting sleeve 11 is provided with a quick-change head 21, a positioning drill bit 23 and a cylindrical hole opener 22; the limiting mechanism 12 includes a limiting steel ball 121, a sliding sleeve 122 and an upper cover 123; the upper end of the drill bit limiting sleeve 11 is provided with a The lower end of the quick-change head 21 is fitted with a first accommodating chamber 111; an ejection mechanism 3 is provided in the first accommodating chamber 111; the upper end thread of the quick-change head 21 is connected to the cylindrical hole opener 22 to form a whole; the inner circular side wall of the sliding sleeve 122 is divided into an upper inner circular side wall 1223 and a lower inner circular side wall 1224; the diameter of the upper inner circular side wall 1223 is larger than the diameter of the lower inner circular side wall 1224; the drill bit limiting sleeve 11 is provided with a first limiting hole 112 that passes through the side wall of the first accommodating chamber 111; the limiting steel ball 121 is fitted into the first limiting hole 112; a first positioning groove 211 is provided on the quick-change head 21, and the limiting steel ball 121 cooperates with the first positioning groove 211 to limit the position; the upper cover 123 is fixedly connected to the drill bit limiting sleeve 11; when the sliding sleeve 122 is pulled backward along the axial direction of the drill bit limiting sleeve 11, the upper inner circular side wall 1223 leaves the limiting steel ball 121, so that the limiting steel ball 121 has an air-avoiding space to reach the unlocked state, and at the same time, the quick-change head 21 is ejected by the ejection mechanism 3; When the sliding sleeve 122 is reset to its normal position by the reset assembly 4, the limiting steel ball 121 is in the mating position with the upper inner circular side wall 1223, and the limiting steel ball 121 and the upper inner circular side wall 1223 are locked together to achieve a locked state. The cooperation between the limiting steel ball 121 and the sliding sleeve 122 forms a locked state and an unlocked state, thereby locking or unlocking the drill bit limiting sleeve 11 and the quick-change head 21. The positioning drill bit 23 is installed on the quick-change head 21 or the drill bit limiting sleeve 11 through the clamp assembly 5. Pulling the sliding sleeve 122 backward can cause the upper inner circular side wall 1223 to move away from the limiting steel ball 121, leaving space for the limiting steel ball 121 to unlock the quick-change head 21, allowing the quick-change head 21 to be ejected by the ejection mechanism 3 for better removal and replacement of the cylindrical hole opener 22, thereby achieving the purpose of quickly returning waste or quickly replacing the cylindrical hole opener 22. When the sliding sleeve 122 returns to its normal position, the upper inner circular side wall 1223 abuts against the limiting steel ball 121, and the limiting steel ball 121 cooperates with the first positioning groove 211 to lock, thereby locking the drill bit limiting sleeve 11 and the quick conversion head 21 and completing the installation of the cylindrical hole opener 22.

[0068] Specifically, in this embodiment, the positioning drill bit 23 is installed on the quick-conversion head 21 through the clamping hoop assembly 5; the clamping hoop assembly 5 includes a steel ball hoop 51 and a clamping steel ball 52; a clamping slot 212 is provided at the lower end of the quick-conversion head 21; a first clamping through hole 213 is provided on the side wall of the clamping slot 212; one end of the steel ball hoop 51 is open; a second clamping through hole 511 is provided on the side wall of the steel ball hoop 51 corresponding to the first clamping through hole 213; a second positioning groove 231 is provided at the lower end of the positioning drill bit 23; after the steel ball hoop 51 is clamped to the clamping slot 212 of the quick-conversion head 21, the clamping steel ball 52 is clamped to the second positioning groove 231 through the second clamping through hole 511 and the first clamping through hole 213 in turn. It should be noted that when the positioning drill bit 23 needs to be installed on the quick conversion head 21, the positioning drill bit 23 is first inserted into the quick conversion head 21, and then the steel ball hoop 51 is clamped on the clamping slot 212, and then the clamping steel ball 52 is inserted from the second clamping through hole 511. The clamping steel ball 52 passes through the second clamping through hole 511 and the first clamping through hole 213 in turn and enters the quick conversion head 21. At this time, the clamping steel ball 52 is clamped on the second positioning groove 231 to achieve the clamping of the positioning drill bit 23. The positioning drill bit 23 is quickly locked and released by setting the steel ball hoop 51 and the clamping steel ball 52, which is more convenient and efficient than the conventional use of fastening screws to lock the positioning drill bit 23.

[0069] Specifically, in this embodiment, the reset assembly 4 includes a positioning pin 41 and a reset spring 42; the positioning pin 41 passes through the drill limit sleeve 11 and the upper cover 123 in sequence; the lower end of the positioning pin 41 is knurled and riveted to the sliding sleeve; the reset spring 42 is sleeved on the positioning pin 41; the upper end of the positioning pin 41 is provided with a limiting end; the upper end of the reset spring 42 abuts on the limiting end; the lower end of the reset spring 42 abuts in the inner hole of the upper cover 123; when the sliding sleeve is pulled backward along the axial direction of the drill limit sleeve 11, the reset spring 42 is in a compressed state.

[0070] Specifically, in this embodiment, the upper cover 123 is fixedly connected to the drill limit sleeve 11 by screws 7.

[0071] Example 3: Figures 20 to 29 As shown, based on Example 2, the clamp assembly 5 is set on the drill bit limiting sleeve 11:

[0072] Specifically, in the present embodiment, the positioning drill bit 23 is installed on the drill bit limiting sleeve 11 through the clamping hoop assembly 5; the clamping hoop assembly 5 includes a steel ball hoop 51, a clamping steel ball 52 and a steel ball hoop fixing sleeve 53; the lower end of the drill bit limiting sleeve 11 is provided with a clamping groove 212; the side wall of the clamping groove 212 is provided with a first clamping through hole 213; one end of the steel ball hoop 51 is open; the side wall of the steel ball hoop 51 is provided with a second clamping through hole 511 corresponding to the first clamping through hole 213; the lower end of the positioning drill bit 23 is provided with a second positioning groove 231; after the steel ball hoop 51 is clamped in the clamping groove 212 of the drill bit limiting sleeve 11, the clamping steel ball 52 It is clamped on the second positioning groove 231 through the second clamping through hole 511 and the first clamping through hole 213 in sequence; a third limiting part 531 and a fourth limiting part 532 are provided on the inner side wall of the steel ball hoop fixing sleeve 53; the inner diameter of the third limiting part 531 is smaller than the inner diameter of the fourth limiting part 532; the steel ball hoop fixing sleeve 53 is movably sleeved on the drill bit limiting sleeve 11 along the axial direction of the drill bit limiting sleeve 11; the sliding sleeve 122 moves axially along the drill bit limiting sleeve 11, so that the third limiting part 531 and the fourth limiting part 532 respectively cooperate with the clamping steel ball 52 to form a locked state and an unlocked state so that the drill bit limiting sleeve 11 and the positioning drill bit 23 are locked or unlocked. It should be noted that when the positioning drill bit 23 needs to be installed on the quick conversion head 21, the positioning drill bit 23 is first inserted into the quick conversion head 21, and then the steel ball hoop 51 is clamped on the clamping groove 212, and then the clamping steel ball 52 is inserted from the second clamping through hole 511. The clamping steel ball 52 passes through the second clamping through hole 511 and the first clamping through hole 213 in sequence and enters the quick conversion head 21. At this time, the clamping steel ball 52 is clamped on the second positioning groove 231. When the steel ball hoop fixing sleeve 53 is pulled downward, the third limiting portion 5 31 abuts against the clamping steel ball 52, thereby clamping the positioning drill bit 23. When the steel ball hoop fixing sleeve 53 is pushed upward, the third limiting portion 531 leaves and passes through the clamping steel ball 52, and the clamping steel ball 52 enters the avoidance space of the fourth limiting portion 532, thereby unlocking the positioning drill bit 23. The utility model controls the rapid locking and release of the positioning drill bit 23 by arranging the steel ball hoop fixing sleeve 53, the steel ball hoop 51 and the clamping steel ball 52, which is more convenient and efficient than the conventional use of fastening screws to lock the positioning drill bit 23.

[0073] Specifically, in this embodiment, the clamp assembly 5 also includes a first clamping spring 54 and a second clamping spring 55; the drill bit limit sleeve 11 is respectively provided with a first annular groove 113 and a second annular groove 114; the first clamping spring 54 is clamped in the first annular groove 113; the second clamping spring 55 is clamped in the second annular groove 114; a limiting ring 533 is provided inside the upper end of the steel ball clamp fixing sleeve 53; the limiting ring 533 moves along the axial direction of the drill bit limit sleeve 11, so that the limiting ring 533 is respectively limited and matched with the first clamping spring 54 and the second clamping spring 55. It should be noted that when the steel ball hoop fixing sleeve 53 is pulled downward into place along the axial direction of the drill bit limiting sleeve 11, the limiting ring 533 cooperates with the second retaining spring 55 to limit the position of the steel ball hoop fixing sleeve 53 when it is pulled down; when the steel ball hoop fixing sleeve 53 is pushed upward along the axial direction of the drill bit limiting sleeve 11, the limiting ring 533 cooperates with the first retaining spring 54 to limit the position of the steel ball hoop fixing sleeve 53 when it is pushed up.

[0074] In summary, the present invention has the following beneficial effects:

[0075] The hole opener connecting rod of the present invention is an improvement on the quick replacement of the hole opener, which makes customers more labor-saving and convenient, and greatly improves work efficiency. The present invention forms a whole by connecting the quick conversion head 21 with the cylindrical hole opener 22. The quick conversion head 21, the drill bit limiting sleeve 11 and the sliding cover are connected in a coordinated manner. After the hole opening processing is completed, the sliding sleeve 122 is pulled backward along the axial direction of the drill bit limiting sleeve 11. When the first limiting portion 1221 cooperates with the limiting steel ball 121, the limiting steel ball 121 cooperates with the first positioning groove 211 to lock. When the second limiting portion 1221 cooperates with the limiting steel ball 121, the limiting steel ball 121 cooperates with the first positioning groove 211 to lock. When the part 1222, the first limiting hole 112 and the first positioning groove 211 are located on the same straight line, the limiting steel ball 121 cooperates with the second limiting part 1222, and the limiting steel ball 121 and the first positioning groove 211 are in an unlocked state. Pull the cylindrical hole opener 22 downward, and the limiting steel ball 121 partially passes through the first limiting hole 112 and slides to the second limiting part 1222 and disengages from the first positioning groove 211. The quick conversion head 21 and the cylindrical hole opener 22 can be easily pulled downward together, thereby achieving the purpose of quickly returning waste or quickly replacing the cylindrical hole opener 22. Or when the sliding sleeve 122 is pulled back along the axial direction of the drill bit limit sleeve 11, the upper inner circular side wall 1223 leaves the limiting steel ball 121 so that the limiting steel ball 121 has an air-avoiding space to reach the unlocked state, and at the same time, the quick-changing head 21 is ejected by the ejection mechanism 3; when the sliding sleeve 122 is reset to the normal position by the resetting assembly 4, and the limiting steel ball 121 is in the matching position of the upper inner circular side wall 1223, the limiting steel ball 121 cooperates with the upper inner circular side wall 1223 to lock and reach the locked state; the locking state and the unlocking state are formed by the cooperation between the limiting steel ball 121 and the sliding sleeve 122 so that the drill bit limit sleeve 11 and the quick-changing head 21 are locked or unlocked; the quick-changing head 21 and the cylindrical hole opener 22 can be easily pulled downward together, so as to achieve the purpose of quickly withdrawing waste material or quickly replacing the cylindrical hole opener 22. The present invention uses a steel ball clamp fixing sleeve 53, a steel ball clamp, and a clamping steel ball 52 to control the rapid locking and release of the positioning drill bit 23. This is more convenient and efficient than conventionally using a set screw to lock the positioning drill bit 23. The present invention is easy to use, provides a good user experience, has a novel structure, is low in manufacturing cost, has good economic benefits, and can be widely promoted.

[0076] The above is a detailed introduction to the technical solutions provided by the embodiments of the present invention. Specific examples are used herein to illustrate the principles and implementation methods of the embodiments of the present invention. The description of the above embodiments is only applicable to help understand the principles of the embodiments of the present invention. At the same time, for those skilled in the art, according to the embodiments of the present invention, there may be changes in the specific implementation methods and application scopes. In summary, the contents of this specification should not be understood as limiting the present invention.

Claims

1. A hole opener connecting rod, comprising a handle assembly and a hole opening assembly, wherein the upper end of the handle assembly is detachably connected to the hole opening assembly, and the lower end of the handle assembly is connected to a drive assembly to drive the hole opening assembly to rotate; characterized in that: The turning handle assembly includes a drill bit limiting sleeve and a limiting mechanism, and the hole opening assembly includes a quick-changing head, a positioning drill bit and a cylindrical hole opener, and the limiting mechanism includes a limiting steel ball and a sliding sleeve; the upper end of the drill bit limiting sleeve is provided with a first accommodating cavity for matching and installing with the lower end of the quick-changing head; an ejection mechanism is provided in the first accommodating cavity; the upper end thread of the quick-changing head is connected with the cylindrical hole opener to form a whole; the drill bit limiting sleeve is provided with a first limiting hole that passes through the side wall of the first accommodating cavity, the limiting steel ball is matched and installed in the first limiting hole, and the lower end of the quick-changing head is provided with a first Positioning groove, the limiting steel ball cooperates with the first positioning groove to limit the position; a first limiting part and a second limiting part are provided on the inner side wall of the sliding sleeve, the inner diameter of the first limiting part is smaller than the inner diameter of the second limiting part, and the sliding sleeve is movably sleeved on the drill bit limiting sleeve along the axial direction of the drill bit limiting sleeve; the sliding sleeve moves axially along the drill bit limiting sleeve, so that the first limiting part and the second limiting part respectively cooperate with the limiting steel ball to form a locked state and an unlocked state so that the drill bit limiting sleeve and the quick conversion head are locked or unlocked; the positioning drill bit is installed on the quick conversion head or the drill bit limiting sleeve through a clamp assembly.

2. The hole opener connecting rod according to claim 1, characterized in that: The positioning drill bit is installed on the quick-change head through a clamping hoop assembly; the clamping hoop assembly includes a steel ball hoop and a clamping steel ball; a clamping slot is provided at the lower end of the quick-change head; a first clamping through hole is provided on the side wall of the clamping slot; one end of the steel ball hoop is open; a second clamping through hole is provided on the side wall of the steel ball hoop corresponding to the first clamping through hole; a second positioning slot is provided at the lower end of the positioning drill bit; after the steel ball hoop is clamped to the clamping slot of the quick-change head, the clamping steel ball is clamped to the second positioning slot through the second clamping through hole and the first clamping through hole in turn.

3. The hole opener connecting rod according to claim 1, characterized in that: The limiting mechanism also includes a positioning member for limiting the downward displacement of the sliding sleeve; the positioning member is installed on the outer side wall of the lower end of the drill bit limiting sleeve through a first C-shaped retaining ring.

4. The hole opener connecting rod according to claim 3, characterized in that: The sliding sleeve contains an elastic component, which is axially movably sleeved on the outer circle of the drill limit sleeve. The upper end of the elastic component abuts the lower end surface of the first limit part; the lower end of the elastic component abuts the upper surface of the positioning member.

5. The hole opener connecting rod according to claim 1, characterized in that: The ejection mechanism includes an ejection block, an ejection spring and a spring fixing ring; the ejection spring is installed in the first accommodating cavity through the spring fixing ring; one end of the ejection block abuts against the ejection spring, and the other end abuts against the quick conversion head.

6. A hole opener connecting rod, comprising a handle assembly and a hole opening assembly, wherein the upper end of the handle assembly is detachably connected to the hole opening assembly, and the lower end of the handle assembly is connected to a drive assembly to drive the hole opening assembly to rotate; characterized in that: The turning handle assembly includes a drill bit limit sleeve and a limit mechanism, and the hole opening assembly includes a quick-changing head, a positioning drill bit and a cylindrical hole opener; the limit mechanism includes a limit steel ball, a sliding sleeve and an upper cover; the upper end of the drill bit limit sleeve is provided with a first accommodating chamber that is mounted in cooperation with the lower end of the quick-changing head; an ejection mechanism is provided in the first accommodating chamber; the upper end thread of the quick-changing head is connected to the cylindrical hole opener to form a whole; the inner circular side wall of the sliding sleeve is divided into an upper inner circular side wall and a lower inner circular side wall; the diameter of the upper inner circular side wall is larger than the diameter of the lower inner circular side wall; the drill bit limit sleeve is provided with a first limit hole that passes through the side wall of the first accommodating chamber; the limit steel ball is mounted in the first limit hole; the quick-changing head is provided with a first positioning groove, and the limit steel ball is connected to the The first positioning groove cooperates for limiting; the upper cover is fixedly connected to the drill limit sleeve; when the sliding sleeve is pulled backward along the axial direction of the drill limit sleeve, the upper inner circular side wall leaves the limiting steel ball so that the limiting steel ball has an air-avoiding space to reach an unlocked state, and at the same time, the quick-conversion head is ejected by the ejection mechanism; when the sliding sleeve is reset to the normal position by the reset assembly, and the limiting steel ball is in the cooperating position of the upper inner circular side wall, the limiting steel ball cooperates with the upper inner circular side wall to lock and reach a locked state; a locked state and an unlocked state are formed by the cooperation of the limiting steel ball and the sliding sleeve to lock or unlock the drill limit sleeve and the quick-conversion head; the positioning drill bit is installed on the quick-conversion head or the drill limit sleeve through the clamp assembly.

7. The hole opener connecting rod according to claim 6, characterized in that: The positioning drill bit is installed on the drill bit limiting sleeve through a clamping hoop assembly; the clamping hoop assembly includes a steel ball hoop, a clamping steel ball and a steel ball hoop fixing sleeve; a clamping slot is provided at the lower end of the drill bit limiting sleeve; a first clamping through hole is provided on the side wall of the clamping slot; one end of the steel ball hoop is open; a second clamping through hole is provided on the side wall of the steel ball hoop corresponding to the first clamping through hole; a second positioning slot is provided at the lower end of the positioning drill bit; after the steel ball hoop is clamped in the clamping slot of the drill bit limiting sleeve, the clamping steel ball passes through the second The clamping through hole and the first clamping through hole are clamped on the second positioning groove; a third limiting part and a fourth limiting part are provided on the inner side wall of the steel ball hoop fixing sleeve; the inner diameter of the third limiting part is smaller than the inner diameter of the fourth limiting part; the steel ball hoop fixing sleeve is movably sleeved on the drill bit limiting sleeve along the axial direction of the drill bit limiting sleeve; the sliding sleeve moves axially along the drill bit limiting sleeve, so that the third limiting part and the fourth limiting part respectively cooperate with the clamping steel ball to form a locked state and an unlocked state so that the drill bit limiting sleeve and the positioning drill bit are locked or unlocked.

8. The hole opener connecting rod according to claim 7, characterized in that: The clamp assembly also includes a first clamping spring and a second clamping spring; the drill bit limiting sleeve is respectively provided with a first ring groove and a second ring groove; the first clamping spring is clamped in the first ring groove; the second clamping spring is clamped in the second ring groove; a limiting ring is provided inside the upper end of the steel ball clamp fixing sleeve; the limiting ring moves along the axial direction of the drill bit limiting sleeve, so that the limiting ring is respectively limited and matched with the first clamping spring and the second clamping spring.

9. The hole opener connecting rod according to claim 7, characterized in that: The steel ball hoop is provided with a clamping protrusion; the quick-change head or the drill bit limiting sleeve is provided with a U-shaped groove; the clamping protrusion is clamped and matched with the U-shaped groove.

10. The hole opener connecting rod according to claim 6, characterized in that: The reset assembly includes a positioning pin and a reset spring; the positioning pin passes through the drill limit sleeve and the upper cover in sequence; the lower end of the positioning pin is knurled and riveted to the sliding sleeve; the reset spring is sleeved on the positioning pin; the upper end of the positioning pin is provided with a limited end; the upper end of the reset spring abuts against the limited end; the lower end of the reset spring abuts against the inner hole of the upper cover; when the sliding sleeve is pulled backward along the axial direction of the drill limit sleeve, the reset spring is in a compressed state.

Images