A tap wrench

Abstract

The application relates to a tap wrench, which comprises a mounting base provided with a sliding groove, two handles fixedly installed at two ends of the mounting base, an installation cavity arranged in the handles, one end of the installation cavity being communicated with the sliding groove and the other end of the installation cavity penetrating the handle end, two clamping blocks slidably installed in the sliding groove and used for clamping and fixing a tap, a pressing rod slidably installed in the installation cavity and rotationally matched with the installation cavity, one end of the pressing rod extending into the sliding groove and being rotationally connected with the clamping block, and the end being threadedly matched with the mounting base, and a tightening mechanism arranged in the installation cavity and used for rotating the pressing rod. Since the pressing rod used for slidingly pushing the clamping block is arranged in the handle, the pressing rod is not easily rotated by the hand during the rotation of the tap for tapping, so that the clamping block is not easily loosened to cause the tap to fall off during the tapping.

Description

Technical Field

[0001] This application relates to the technical field of internal thread machining tools, and in particular to a tap wrench. Background Technology

[0002] Manual taps are used in conjunction with tap wrenches to manually tap the inside of holes, and are widely used in machining and maintenance.

[0003] The tap wrench includes a mounting base, two clamping blocks that slide on the mounting base, and two handles threaded onto both ends of the mounting base. The two handles are rotatably connected to the two clamping blocks respectively. When using the tap wrench, first insert the clamping end of the tap into the two clamping blocks, then turn the handles to tighten them, thereby pushing the clamping blocks to slide and clamp the tap to fix it on the mounting base. Then, align the tap with the hole position and drive the tap to rotate and tap through the two handles.

[0004] However, when using a tap wrench to rotate the tap for tapping, the handle can easily loosen during the rotation of the tap, causing the clamps to loosen and the tap to fall out from between the two clamps. This can easily damage the tapped thread or even cause the tap to break.

[0005] To solve the above problems, an existing tap wrench has a positioning screw threaded onto the mounting base. After the handle is tightened, the positioning screw is tightened again with a screwdriver. The positioning screw presses against the handle to fix it in place, making it less likely to loosen when the handle rotates the tap.

[0006] Regarding the above technical solution, the inventor believes that the following defects exist: if the handle becomes loose after being tightened, the positioning screw needs to be loosened first for reinstallation, which is too cumbersome. At the same time, the positioning screw is easy to damage the handle, causing the side wall of the handle to bulge, which in turn causes the handle to jam between the handle and the mounting base. Therefore, there is an urgent need for a tap wrench that is not easy to loosen during tapping and makes it easy to disassemble and assemble the tap. Summary of the Invention

[0007] To address the problem that traditional tap wrenches, which use positioning screws to fix the handle, make tap installation cumbersome, this application provides a tap wrench.

[0008] The tap wrench provided in this application adopts the following technical solution:

[0009] A tap wrench, comprising:

[0010] The mounting base is equipped with a sliding groove;

[0011] The handle has two parts, which are fixedly installed at both ends of the mounting base. Each part has a mounting cavity inside. One end of the mounting cavity is connected to the slide groove, and the other end of the mounting cavity passes through the end of the handle.

[0012] Two clamping blocks are provided, both of which are slidably installed in the sliding groove for clamping and fixing the tap;

[0013] The clamping rod is slidably installed in the mounting cavity and rotatably engaged with the mounting cavity. One end of the rod extends into the groove and is rotatably connected to the clamping block, and the end is threadedly engaged with the mounting base.

[0014] A tightening mechanism is located in the mounting cavity and is used to cooperate with the hand to rotate the clamping rod.

[0015] With the above technical solution, since the clamping rod used to push the clamping block to slide and clamp is located inside the handle, when the tap is turned by the handle, the clamping rod is not easily interfered with by the hand and thus the clamping block is not easily loosened during the tapping process and the tap falls off.

[0016] Optionally, the tightening mechanism includes:

[0017] Tighten the rod, rotate it into the mounting cavity, and slide it into the mounting cavity;

[0018] A connector is provided on the abutment rod for connecting and fixing with the tightening rod, and so that the abutment rod can be separated from the tightening rod after tightening.

[0019] A fastener is used to secure the tightening rod to the handle;

[0020] A force-applying plate, located at the end of the tightening rod, has a width greater than the diameter of the tightening rod and is used to rotate the tightening rod.

[0021] With the above technical solution, after the tightening rod is connected to the abutment rod through the connector, the abutment rod is tightened by rotating the tightening rod with less effort through the force-adding plate with a larger width. At the same time, after the abutment rod is tightened and the abutment rod is separated from the tightening rod, the tightening rod is fixed to the handle by the fixing component. Firstly, this makes it less likely for the tightening rod to be lost, and during use, the tightening rod can be directly pushed to slide until it is connected to the connector, which is more convenient. At the same time, after the tightening rod is fixed by the fixing component, the tightening rod is less likely to rotate during tapping, and the clamping block is less likely to loosen after clamping the tap.

[0022] Optionally, the connector includes a fixing post, which is located on the end face of the clamping rod away from the clamping block. The end face of the tightening rod is provided with a first fixing hole that slides and engages with the fixing post. The tightening rod can be rotated until the fixing post corresponds to the first fixing hole.

[0023] Optionally, the connector includes a regular polygonal fixing block, which is coaxially disposed on the end face of the clamping rod opposite to the clamping block, and the tightening rod is coaxially provided with a second fixing hole facing the end face of the clamping rod, which slides and engages with the fixing block.

[0024] Optionally, the end face of the fixing post opposite to the abutment rod has an arc-shaped protrusion.

[0025] Optionally, the fixing member includes a connecting shaft located at the end of the tightening rod opposite to the abutment rod. The connecting shaft has a fixing plate with an elongated hole through it. The connecting shaft slides through the elongated hole. A locking groove is provided on the side wall of the handle, communicating with the mounting cavity. The locking groove passes through the end face of the handle opposite to the mounting base. A locking hole is provided on the side wall of the handle opposite to the locking groove, communicating with the mounting cavity. The locking groove and the fixing plate slide together, and the locking hole and the fixing plate slide together. When the fixing plate slides into the locking groove, one end of the fixing plate can slide through the locking hole. At this time, the tightening rod separates from the connecting member, and the force-applying plate is located on the fixing plate.

[0026] Optionally, the end face of the tightening rod opposite to the abutment rod has a mounting groove, both sides of the mounting groove penetrate the side wall of the abutment rod, the axis of the abutment rod is located in the middle surface of the mounting groove, the connecting shaft is located at the bottom of the mounting groove, the fixing plate is slidably installed in the mounting groove, the bottom of the mounting groove has a retaining groove, one end of the fixing plate can be slidably inserted into the retaining groove, at this time the end of the fixing plate connected to the force-adding plate protrudes from the mounting groove.

[0027] Optionally, the force-adding plate is fitted with a rubber sleeve, and the locking groove is stepped. When one end of the fixing plate passes through the locking hole, the force-adding plate and the rubber sleeve are fitted into the wider part of the locking groove.

[0028] Optionally, the end of the fixing plate facing away from the force-applying plate is semi-circular.

[0029] Optionally, the end face of the clamping rod is coaxially provided with a mounting shaft, and the end face of the tightening rod is coaxially provided with a connecting hole, and the mounting shaft is slidably and rotatably mounted in the connecting hole.

[0030] With the above technical solution, the clamping rod and the tightening rod are rotatably connected by the mounting shaft, which allows the tolerance between the mounting cavity and the clamping rod and the tightening rod to be designed to be larger, which facilitates the installation and disassembly of the tightening rod and the clamping rod, and the fixing column and the first fixing hole or the fixing block and the second fixing hole can still be precisely matched.

[0031] In summary, this application, by placing the clamping rod used to push the clamping block into the mounting cavity of the handle, and by rotating the clamping rod through the tightening rod and the force plate, makes it easier to tighten the clamping rod. At the same time, when the mounting base and tap are rotated by the handle for tapping, the clamping rod is less likely to be affected. Furthermore, since the tightening rod is fixed by the fixing plate, when the tightening rod is tapped, it separates from the clamping rod. Because it is fixed to the handle, it is not easy to lose it. It also does not need to be reinserted into the mounting cavity when used again, making it more convenient to use. Attached Figure Description

[0032] Figure 1 This is a three-dimensional structural diagram of this application.

[0033] Figure 2 This is an exploded view of the present application, showing the first type of connector.

[0034] Figure 3 This is an exploded view of this application, showing the second type of connector.

[0035] Figure 4 This is a cross-sectional view of this application, showing the second type of connector.

[0036] Figure 5 yes Figure 4 Enlarged schematic diagram of part A in the middle.

[0037] Those skilled in the art will understand that the elements in the accompanying drawings are shown for simplicity and clarity and are not necessarily drawn to scale. For example, the size and position of some elements in the drawings may be enlarged relative to other elements to aid in understanding the embodiments of the invention.

[0038] Reference numerals: 1. Mounting base; 11. Slide groove; 12. Clamping block; 13. Abutting rod; 2. Handle; 21. Mounting cavity; 22. Locking groove; 23. Locking hole; 3. Tightening mechanism; 31. Tightening rod; 311. Mounting groove; 312. Slot; 32. Fixing component; 321. Fixing plate; 322. Elongated hole; 323. Connecting shaft; 33. Force plate; 34. Rubber sleeve; 4. Connecting component; 41. Fixing column; 42. First fixing hole; 43. Fixing block; 44. Second fixing hole; 5. Mounting shaft. Detailed Implementation

[0039] The following is in conjunction with the appendix Figure 1 —5 provides further details regarding this application.

[0040] This application discloses a tap wrench, as shown in the embodiments below. Figure 1 , Figure 2 and Figure 3It includes a cylindrical mounting base 1, two cylindrical handles 2 and two clamping blocks 12. The mounting base 1 is provided with a sliding groove 11. The two clamping blocks 12 are slidably installed in the sliding groove 11 of the mounting base 1. The two ends of the sliding groove 11 penetrate through the two end faces of the mounting base 1.

[0041] Reference Figure 1 , Figure 2 and Figure 3 After one of the clamping blocks 12 slides to the designated position, it is fixed in the same way as the tap wrench in the prior art, while the other clamping block 12 acts as an active clamping member to slide and clamp.

[0042] Reference Figure 1 , Figure 2 and Figure 3 Each end of the mounting base 1 is integrally provided with a connector, and two handles 2 are respectively inserted into the two connectors and fixed to the connectors by positioning bolts.

[0043] Reference Figure 2 , Figure 3 and Figure 4 The handle 2 has a coaxial mounting cavity 21 with a circular cross-section. Both ends of the mounting cavity 21 penetrate both ends of the handle 2 and are connected to the slide groove 11. A clamping rod 13 is slidably mounted in the mounting cavity 21. One end of the clamping rod 13 extends into the slide groove 11 and is rotatably connected to the clamping block 12. The clamping rod 13 is threadedly engaged with the mounting base 1. By rotating the clamping rod 13, the clamping block 12 is slidably moved to clamp another clamping block 12.

[0044] The mounting cavity 21 is also equipped with a tightening mechanism 3, which is used to tighten the clamping rod 13 by rotating it with the hand.

[0045] Reference Figure 2 , Figure 3 and Figure 4 The tightening mechanism 3 includes a tightening rod 31 and a connector 4. The side of the clamping rod 13 facing away from the clamping block 12 is coaxially and integrally provided with an installation shaft 5. One end face of the tightening rod 31 is coaxially provided with a connecting hole that slides and cooperates with the installation shaft 5. The installation shaft 5 is slidably inserted into the connecting hole, and the tightening rod 31 is slidably installed in the installation cavity 21.

[0046] Reference Figure 2One type of connector 4 includes multiple fixing posts 41. The fixing posts 41 are integrally disposed on the end face of the clamping rod 13 with the mounting shaft 5 around the axis of the mounting shaft 5. The end face of the tightening rod 31 is provided with multiple first fixing holes 42 around its axis. The first fixing holes 42 correspond one-to-one with the fixing posts 41. The tightening rod 31 can slide to the fixing posts 41 and be inserted into the first fixing holes 42 one-to-one. The clamping rod 13 and the tightening rod 31 are circumferentially fixed by the cooperation between the fixing posts 41 and the first fixing holes 42.

[0047] The end face of the fixing post 41 facing away from the clamping rod 13 is hemispherical, which makes it easier for the fixing post 41 to slide into the fixing hole.

[0048] Reference Figure 3 and Figure 4 Another type of connector 4 includes a regular hexagonal fixing block 43, which is coaxially and integrally disposed on the end face of the mounting shaft 5. A second fixing hole 44 is coaxially and integrally formed at the bottom of the connecting hole. The second fixing hole 44 and the fixing block 43 slide against each other. When the tightening rod 31 is rotated to the point where the second fixing hole 44 and the fixing block 43 are aligned with each other, the tightening rod 31 can slide to the fixing block 43 and slide into the second fixing hole 44. The cooperation between the second fixing hole 44 and the fixing block 43 makes the clamping rod 13 and the tightening rod 31 circumferentially fixed.

[0049] Reference Figure 2 , Figure 3 and Figure 4 An installation groove 311 is provided on the end face of the tightening rod 31 away from the abutment rod 13. The installation groove 311 is opened along the axial direction of the tightening rod 31. The axial direction of the tightening rod 31 is located in the middle surface of the installation groove 311. Both ends of the installation groove 311 penetrate the side wall of the tightening rod 31.

[0050] Reference Figure 2 , Figure 3 and Figure 4 The tightening rod 31 is provided with a fixing member 32, which includes a connecting shaft 323 located at the bottom of the mounting groove 311. Both ends of the connecting shaft 323 are fixedly connected to the side wall of the mounting groove 311, and the axis of the connecting shaft 323 is perpendicular to the plane where the side wall of the mounting groove 311 is located.

[0051] Reference Figure 4 and Figure 5 The fastener 32 also includes a fixing plate 321 that is slidably installed in the mounting groove 311. The fixing plate 321 is rectangular and has an elongated hole 322 extending through it along its length. The elongated hole 322 is designed as an elongated oval hole through which the connecting shaft 323 slides, with both ends of the elongated hole 322 engaging with the connecting shaft 323.

[0052] Reference Figure 4 and Figure 5 One end of the fixing plate 321 extends out of the mounting groove 311 and is located to the outside. The end of the fixing plate 321 located to the outside is integrally provided with a force-adding plate 33. The width of the force-adding plate 33 is greater than the diameter of the tightening rod 31. The force-adding plate 33 is fitted with a rubber sleeve 34. The fixing plate 321 can be rotated relatively easily through the force-adding plate 33, which in turn drives the tightening rod 31 to rotate. The rotation of the tightening rod 31 drives the abutment rod 13 to rotate. Moreover, due to the larger width of the force-adding plate 33, tightening is easier.

[0053] Reference Figure 4 and Figure 5 A locking groove 22 is provided on the end side wall of the handle 2. The locking groove 22 passes through the end face of the handle 2 and is connected to the interior of the mounting cavity 21. The locking groove 22 is stepped. Rotating the tightening rod 31 can make the mounting groove 311 and the locking groove 22 face each other. At the same time, the fixing plate 321 slides and engages with the narrower end of the locking groove 22.

[0054] Reference Figure 4 and Figure 5 A locking hole 23 is provided through the side wall of the handle 2 on the other side of the locking groove 22. The locking hole 23 is slidably engaged with the fixing plate 321. When the fixing plate 321 is slidably installed in the locking groove 22 and the length direction of the fixing plate 321 is perpendicular to the axis of the handle 2, the end of the fixing plate 321 away from the force plate 33 corresponds to the locking hole 23.

[0055] Reference Figure 4 and Figure 5 The force-adding plate 33 and the rubber sleeve 34 are fitted into the wider end of the locking groove 22. When the locking hole 23 at one end of the fixing plate 321 corresponds, the sliding fixing plate 321 can fit the force-adding plate 33 and the rubber sleeve 34 into the locking groove 22, and at this time, one end of the fixing plate 321 slides through the locking hole 23.

[0056] When one end of the fixing plate 321 passes through the locking hole 23, the fixing post 41 is pulled out from the first fixing hole 42 and the fixing block 43 is pulled out from the second fixing hole 44.

[0057] By cooperating with the fixing plate 321, the locking groove 22 and the locking hole 23, the tightening rod 31 is separated from the abutment rod 13 and then the tightening rod 31 is fixed, so that after the abutment rod 13 is tightened, the tightening rod 31 will not affect the abutment rod 13, and the tightening rod 31 is not easy to lose.

[0058] Reference Figure 4 and Figure 5When the tightening rod 31 is needed, press the end of the fixing plate 321 that passes through the locking hole 23 to push the force plate 33 and the rubber sleeve 34 out of the locking groove 22. Then rotate the fixing plate 321 back into the mounting groove 311, and then rotate and push the tightening rod 31 so that the fixing post 41 is opposite to the first fixing hole 42 or the fixing block 43 is opposite to the second fixing hole 44. Push the tightening rod 31 to slide until the fixing post 41 is inserted into the first fixing hole 42 or the fixing block 43 is slid into the second fixing hole 44. After the circumferential fixation between the abutment rod 13 and the tightening rod 31 is completed, the abutment rod 13 can be rotated by rotating the force plate 33 and the tightening rod 31.

[0059] Reference Figure 4 and Figure 5 The end of the fixing plate 321 facing away from the force-applying plate 33 is semi-circular to facilitate the sliding of the fixing plate 321 through the locking hole 23. When the force-applying plate 33 is embedded in the locking groove 22, the end face of the force-applying plate 33 is flush with the end face of the handle 2, and the other end of the force-applying plate 33 is pressed against the side wall of the locking groove 22. At the same time, the locking hole 23 is opened on the side of the handle 2 facing the tap.

[0060] Reference Figure 4 and Figure 5 The bottom of the mounting groove 311 is provided with a slot 312. The slot 312 and the fixing plate 321 slide together. Before the fixing plate 321 drives the tightening rod 31 to rotate, the fixing plate 321 slides first to insert one end of the fixing plate 321 into the slot 312. The slot 312 fixes the sliding of the fixing plate 321, so that the fixing plate 321 is not easy to slide out of the mounting groove 311 and slide into the locking groove 22 when the tightening rod 31 rotates, thus preventing it from getting stuck.

[0061] The implementation principle of a tap wrench in this application embodiment is as follows:

[0062] When tapping is required, first insert the clamping end of the tap between the two clamping blocks 12, then push the fixing plate 321 into the slot 312 for fixation, then push the tightening rod 31 to slide until the fixing post 41 abuts against the end face of the tightening rod 31 or the fixing block 43 abuts against the bottom of the connecting hole, then rotate the tightening rod 31 until the fixing post 41 corresponds to the first fixing hole 42 or the fixing block 43 corresponds to the second fixing hole 44, then push the tightening rod 31 so that the fixing post 41 is inserted into the first fixing hole 42 or the fixing block 43 is slid into the second fixing hole 44, completing the connection and fixation between the tightening rod 31 and the clamping rod 13, and then through The force plate 33 rotates to tighten the rod 31 and the abutment rod 13. The abutment rod 13 slides to push the clamping block 12 to clamp and fix the tap. After fixing the tap, the fixing plate 321 is pulled out from the slot 312, which in turn causes the tightening rod 31 to separate from the connecting piece 4. Then, the tightening rod 31 is rotated so that the fixing plate 321 is opposite to the locking groove 22. The fixing plate 321 is pushed into the locking groove 22, and the force plate 33 is aligned with the locking groove 22. At this time, the fixing plate 321 is also aligned with the locking hole 23. The force plate 33 is pushed into the locking groove 22, and the end of the fixing plate 321 is pushed through the locking hole 23, thus fixing the tightening rod 31 and the handle 2.

[0063] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A tap wrench, characterized in that The utility model relates to a screw tap, which comprises: a mounting base (1) provided with a sliding groove (11); two handles (2) fixedly installed at two ends of the mounting base (1) respectively, each of which is internally provided with a mounting cavity (21) in communication with the sliding groove (11) at one end and penetrating the handle (2) at the other end; two clamping blocks (12) slidably installed in the sliding groove (11) for clamping and fixing a tap; a pressing rod (13) slidably installed in the mounting cavity (21) and rotationally connected with the mounting cavity (21), one end of the pressing rod (13) extending into the sliding groove (11) and rotationally connected with the clamping block (12) and threadedly connected with the mounting base (1) at the end; a tightening mechanism (3) arranged in the mounting cavity (21) for rotating the pressing rod (13) by hand. Since the pressing rod (13) for slidingly clamping the clamping block (12) is located in the handle (2), the pressing rod (13) is not easily rotated by hand when the tap is screwed by rotating the handle (2), so that the clamping block (12) is not easily loosened to cause the tap to fall off during screwing. The tightening mechanism (3) comprises: a tightening rod (31) rotationally installed in the mounting cavity (21) and slidably connected with the mounting cavity (21); a connecting piece (4) arranged on the pressing rod (13) for connecting and fixing the tightening rod (31) and allowing the pressing rod (13) to be separated from the tightening rod (31) after being tightened; a fixing piece (32) for fixing the tightening rod (31) on the handle (2); a force-adding plate (33) arranged at the end of the tightening rod (31) and having a width greater than the diameter of the tightening rod (31) for rotating the tightening rod (31); the connecting piece (4) comprises a fixing column (41) arranged on the end face of the pressing rod (13) away from the clamping block (12), the end face of the tightening rod (31) is provided with a first fixing hole (42) slidably connected with the fixing column (41), and the tightening rod (31) can be rotated to correspond to the first fixing hole (42).

2. A tap wrench according to claim 1, wherein: The connecting piece (4) comprises a regular polygonal fixing block (43) coaxially arranged on the end face of the pressing rod (13) away from the clamping block (12), and the end face of the tightening rod (31) towards the pressing rod (13) is coaxially provided with a second fixing hole (44) slidably connected with the fixing block (43).

3. A tap wrench according to claim 1, wherein: The end face of the fixing column (41) away from the pressing rod (13) is arc-shaped and protruded.

4. A tap wrench according to either of claims 1 or 2, wherein: The fixing part (32) comprises a connecting shaft (323) arranged at one end of the tightening rod (31) away from the pressing rod (13), the connecting shaft (323) is provided with a fixing plate (321), the fixing plate (321) is provided with a long hole (322) penetrating through, the connecting shaft (323) slides through the long hole (322), the side wall of the handle (2) is provided with a locking groove (22) in communication with the mounting cavity (21), the locking groove (22) penetrates the end face of one end of the handle (2) away from the mounting base (1), the side wall of the handle (2) is provided with a locking hole (23) on the other side relative to the locking groove (22), the locking hole (23) is in communication with the mounting cavity (21), the locking groove (22) and the fixing plate (321) slide fit, the locking hole (23) and the fixing plate (321) slide fit, when the fixing plate (321) slides and inserts into the locking groove (22), one end of the fixing plate (321) can slide through the locking hole (23), at this time the tightening rod (31) is separated from the connecting piece (4), and the stressing plate (33) is arranged on the fixing plate (321).

5. A tap wrench according to claim 4 wherein: The end face of one end of the tightening rod (31) away from the pressing rod (13) is provided with a mounting groove (311), the side wall of the pressing rod (13) is penetrated through on both sides of the mounting groove (311), the axis of the pressing rod (13) is located in the middle face of the mounting groove (311), the connecting shaft (323) is located at the groove bottom of the mounting groove (311), the fixing plate (321) is slidably installed in the mounting groove (311), the groove bottom of the mounting groove (311) is provided with a clamping groove (312), one end of the fixing plate (321) can slide and insert into the clamping groove (312), at this time the end of the fixing plate (321) connected with the stressing plate (33) extends out of the mounting groove (311).

6. A tap wrench according to claim 4 wherein: The stressing plate (33) is sleeved with a rubber sleeve (34), the locking groove (22) is in a stepped shape, when one end of the fixing plate (321) penetrates through the locking hole (23), the stressing plate (33) and the rubber sleeve (34) are matched and arranged in the part with larger width of the locking groove (22).

7. A tap wrench according to claim 5 wherein: One end of the fixing plate (321) away from the stressing plate (33) is in a semicircular shape.

8. A tap wrench according to either of claims 1 or 2, wherein: The end face of the pressing rod (13) is coaxially provided with a mounting shaft (5), the end face of the tightening rod (31) is coaxially provided with a connecting hole, and the mounting shaft (5) is slidably and rotatably installed in the connecting hole.

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