Nut tapping machine

Abstract

The invention provides a nut tapping machine, and relates to the technical field of tapping machines. The device comprises a bottom plate, a main body is fixedly connected to the upper surface of the bottom plate, a discharging port is fixedly connected to the inner side of the main body, a fixing plate is fixedly connected to the rear end of the bottom plate, an adjusting device is arranged on the upper surface of the fixing plate, and a limiting device is arranged on the inner side of the main body. The nut blank is continuously conveyed through the pushing device, operation of the tapping machine is facilitated, the working efficiency is improved, the nut blank is vibrated through the vibration device before being fixed, the situation that when the nut blank is pushed to the rotating plate by the pushing device, the bottom face of the nut blank is not stably located on the rotating plate is prevented, and the machining precision of the tapping machine is improved. And by arranging a weight block and a rotating plate, after tapping is completed and a pushing block leaves, a bolt is heavier, and the rotating plate presses a nut downwards to fall into a collecting box for rapid collection.

Description

Technical Field

[0001] The invention relates to the technical field of tapping machines, in particular to a nut tapping machine. Background Art

[0002] Nut tapping machine is a mechanical device specially used for processing internal threads on nuts. With the development of industrialization and mass production, the demand for nut processing has gradually increased, especially in the fields of automobile, machinery manufacturing, electronics, aerospace, etc. Threaded connection is a common fastening method, and the demand for nuts is large and requires high precision. Therefore, nut tapping machine came into being and became one of the indispensable equipment in nut production line.

[0003] During the processing and manufacturing process of nuts, it is necessary to tap the inside of the nuts to create internal threads for easy use with bolts. Existing nuts are drilled inside using a tapping machine, such as "the utility model patent application with publication number CN211219014U discloses a nut tapping machine", which clamps the workpiece by left and right limit blocks, and then processes the workpiece by a tapping power head. However, this method can only clamp one at a time, and the tapping efficiency is low. Furthermore, "the invention patent application with publication number CN109877401B discloses a nut tapping machine", which records that multiple drill bits are set to drill holes for multiple nuts at the same time to improve production efficiency, but the nut blank in the article needs to be placed manually and the baffle needs to be manually pulled out, so that the nuts fall and are collected, which is more troublesome. Summary of the invention

[0004] 1. Technical issues to be resolved

[0005] In view of the deficiencies in the prior art, the present invention provides a nut tapping machine, which solves the problems of not being able to work continuously due to the inability to automatically feed materials and not being able to produce nuts of different sizes.

[0006] (II) Technical solution

[0007] To achieve the above objectives, the present invention is implemented through the following technical solutions: a nut tapping machine, comprising a base plate, a main body is fixedly connected to the upper surface of the base plate, a discharge port is fixedly connected to the inner side of the main body, a fixing plate is fixedly connected to the rear end of the base plate, an adjustment device is arranged on the upper surface of the fixing plate, a limiting device is arranged on the inner side of the main body, a vibration device is arranged on the inner side of the base plate near the main body, a pushing device is arranged on the inner side of the main body and at the right end of the vibration device, and a collection box is movably connected to the inner side of the main body near the left end.

[0008] Preferably, the pushing device includes a first sliding bar, a first spring, a pushing block, a first inclined block and a first limiting rod, the pushing block is slidably connected to the inner surface of the base plate, one end of the first sliding bar is fixedly connected to the right side surface of the pushing block, the other end of the first sliding bar is slidably connected to the inner surface of the base plate, the first spring is sleeved on the side surface of the first sliding bar, one end of the first spring is fixedly connected to the right side surface of the pushing block, the other end of the first spring is fixedly connected to the inner surface of the base plate, the first inclined block is fixedly connected to the front side surface of the pushing block, the first limiting rod is slidably connected to the inner surface of the main body, and the lower end of the first limiting rod contacts the inclined surface of the first inclined block.

[0009] Preferably, the vibration device includes a second sliding bar, a second spring, a toothed plate, a second inclined surface block, a rotating roller, a gear, a connecting rod, a vibration plate, a rotating plate, a limiting round rod, a weight block and a second limiting rod, one end of the second sliding bar is slidably connected to the inner surface of the bottom plate, the other end of the second sliding bar is fixedly connected to the right end of the toothed plate, the second spring is sleeved on the side surface of the second sliding bar, one end of the second spring is fixedly connected to the inner surface of the bottom plate, the other end of the second spring is fixedly connected to the right end of the toothed plate, the left end of the toothed plate is fixedly connected to the right end of the second inclined surface block, and the rotating roller is rotatably connected to the second The inner surface of the inclined block, the gear is rotatably connected to the inner surface of the base plate, the tooth plate is meshed with the gear, a pin is fixedly connected to the edge of the gear, the connecting rod is movably connected to the side surface of the gear through the pin, the other end of the connecting rod is movably connected to the inner surface of the vibration plate, the vibration plate is slidably connected to the inner surface of the base plate, the limiting round rod is fixedly connected to the inner surface of the rotating plate, the rotating plate is movably connected to the inner surface of the vibration plate through the limiting round rod, the weight block is fixedly connected to the lower side of the rotating plate and is located at the right end of the rotating plate, and the second limiting rod is fixedly connected to the inner surface of the base plate.

[0010] Preferably, the limiting device includes a third moving block, a first limiting oblique block, a first moving rod, an electric push rod, a second limiting oblique block, a limiting strip, a third sliding rod, a third spring and a sliding limiting plate, the third moving block is slidably connected to the inner surface of the main body, the upper end of the first moving rod is fixedly connected to the lower surface of the third moving block near the front end, the first limiting rod is fixedly connected to the right side surface of the third moving block near the front end, the lower end of the sliding limiting plate is fixedly connected to the upper surface of the bottom plate, the upper end of the sliding limiting plate is slidably connected to the inner surface of the third moving block, and the output end of the electric push rod is fixedly connected to The third sliding rod is connected to the upper surface of the third moving block, and the third sliding rod is slidably connected to the inner surface of the third moving block. The lower end of the third sliding rod is fixedly connected to the upper surface of the second limiting inclined block, and the limiting bar is fixedly connected to the right side surface of the second limiting inclined block. The second limiting inclined block is slidably connected to the inner surface of the third moving block through the limiting bar. The third spring is sleeved on the side surface of the third sliding rod, and the upper end of the third spring is fixedly connected to the inner surface of the third moving block. The lower end of the third spring is fixedly connected to the upper surface of the second limiting inclined block, and the lower end of the first limiting inclined block is fixedly connected to the upper surface of the bottom plate.

[0011] Preferably, the adjusting device includes a first moving block, a motor, a first screw rod, a second moving block, a second screw rod, a tapping device, a tapping head, a rotating handle, a limiting slide rod, a third screw rod, a worm gear and a worm, the motor is fixedly connected to the rear surface of the fixed plate, the right end of the first screw rod passes through the fixed plate and is fixedly connected to the output end of the motor, the first screw rod is rotatably connected to the inner surface of the fixed plate, the first moving block is threadedly connected to the side surface of the first screw rod, the first moving block is slidably connected to the inner surface of the fixed plate, the upper end of the limiting slide rod is fixedly connected to the lower surface of the second moving block, and the lower end of the limiting slide rod is slidably connected to the first moving block The inner surface of the block, the upper end of the third screw rod is fixedly connected to the lower surface of the second moving block, the worm wheel is threadedly connected to the side surface of the third screw rod, the worm is rotatably connected to the inner surface of the first moving block, the rotating handle is fixedly connected to one end of the worm rod located on the outside of the first moving block, the worm wheel is threadedly connected to the worm rod, the second moving block is movably connected to the inner surface of the first moving block, the second screw rod is rotatably connected to the inner surface of the second moving block, the lower end of the tapping device is slidably connected to the inner surface of the second moving block, the tapping device is threadedly connected to the side surface of the second screw rod, and the tapping head is arranged on the inner surface of the tapping device.

[0012] Working principle: place the nut blank in the discharge port and drop it onto the opening of the push block. Other nut blanks are stacked in the discharge port. Then, the electric push rod is started to drive the third moving block to move downward. When the third moving block moves downward, it drives the first limit rod to move downward. The lower end of the first limit rod contacts the inclined surface of the first inclined surface block. The first limit rod moves downward through the inclined surface to drive the push block to move to the position of the limit device. The movement of the push block drives the nut blank to move between the sliding limit plates. At the same time, the push block limits the rotating plate to prevent the gear from opening, and at the push block During movement, the next nut blank in the discharge port slides below the upper surface of the pushing block and is limited in the discharge port without falling. A slide groove is provided below the first inclined surface block, which is opposite to the first limiting rod. Then the first limiting rod leaves the first inclined surface block and continues to move downward and falls into the slide groove. The third moving block continues to move downward, and the bottom of the first moving rod contacts the inclined surface of the first limiting rod, thereby driving the rotating drum to move. The toothed plate drives the gear to rotate through gear meshing. The rotation of the gear drives the vibration plate to move slightly through the latch and the connecting rod, thereby achieving the vibration effect. , then the third moving block continues to move downward, the inclined surface of the second limiting inclined block contacts one side of the hexagonal nut blank, and the nut blank is limited by the first limiting inclined block contacting the other side, and then the tapping equipment is started, the tapping head starts to rotate, and at the same time, the motor drives the first screw rod to rotate and drive the first moving block to move, and the tapping equipment cooperates with the motor to perform tapping operation on the nut blank. After tapping is completed, the electric push rod rotates in the opposite direction to drive the third moving block to move upward, and the first inclined surface block returns to its original position under the action of the second spring, and the pushing block returns to its original position under the action of the first spring. At this time, another nut blank in the discharge port falls to the front of the pushing block, and the pushing block releases the limit on the rotating plate. The nut flips the rotating plate cover through its own gravity and falls into the collection box for subsequent processing. When it is necessary to replace nut blanks of different models, the tapping equipment can be driven to move horizontally by rotating the second screw rod through the thread, and the worm gear is driven to rotate by turning the handle, thereby driving the third screw rod to move upward, and the third screw rod moves upward to drive the second moving block to move upward to adjust the tapping head to align with the center of the nut blank, and replace the tapping head for tapping operation.

[0013] (III) Beneficial effects

[0014] The present invention provides a nut tapping machine. It has the following beneficial effects:

[0015] 1. By setting up a pushing device to continuously convey the nut blank, the tapping machine operation is convenient and the work efficiency is improved.

[0016] 2. By setting a vibration device to vibrate the nut blank before fixing it, it is prevented that the bottom surface of the nut blank is not stably located on the rotating plate when the nut blank is pushed onto the rotating plate by the pushing device, resulting in a loose fixation, thereby improving the stability of tapping.

[0017] 3. By setting a weight block and a rotating plate, after the tapping is completed and the push block leaves, the heavier bolt rotates and presses the nut down into the collection box for collection.

[0018] 4. The position of the tapping head can be adjusted by setting an adjustment device to produce nuts of different types, saving costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic diagram of the overall structure of a nut tapping machine proposed by the present invention;

[0020] Figure 2 It is a left view of a nut tapping machine proposed by the present invention;

[0021] Figure 3 A schematic diagram of the internal structure of a nut tapping machine proposed by the present invention;

[0022] Figure 4 This is a schematic structural diagram of a pushing device of a nut tapping machine proposed by the present invention;

[0023] Figure 5 This is a schematic structural diagram of a vibration device of a nut tapping machine proposed by the present invention;

[0024] Figure 6 This is a schematic diagram of the rotating plate structure of a nut tapping machine proposed by the present invention;

[0025] Figure 7 This is a schematic diagram of the overall structure of a limiting device of a nut tapping machine proposed by the present invention;

[0026] Figure 8 This is a schematic diagram of the internal structure of a limiting device of a nut tapping machine proposed by the present invention;

[0027] Fig. 9 This is a schematic diagram of the overall structure of an adjustment device of a nut tapping machine proposed by the present invention;

[0028] Fig.10 The present invention is a schematic diagram of the internal structure of an adjusting device of a nut tapping machine proposed by the present invention.

[0029] Among them, 1. bottom plate; 2. main body; 3. discharge port; 4. adjustment device; 401. first moving block; 402. motor; 403. first screw rod; 404. second moving block; 405. second screw rod; 406. tapping device; 407. tapping head; 408. rotating handle; 409. limit slide rod; 410. third screw rod; 411. worm gear; 412. worm; 5. vibration device; 501. second slide rod; 502. second spring; 503. tooth plate; 504. second inclined block; 505. rotating roller; 506. gear; 507. connecting rod; 508 , vibration plate; 509, rotating plate; 510, limiting round rod; 511, weight block; 512, second limiting rod; 6, pushing device; 601, first slide bar; 602, first spring; 603, pushing block; 604, first inclined block; 605, first limiting rod; 7, limiting device; 701, third moving block; 702, first limiting inclined block; 703, first moving rod; 704, electric push rod; 705, second limiting inclined block; 706, limiting strip; 707, third slide bar; 708, third spring; 709, sliding limiting plate; 8, collection box; 9, fixed plate. DETAILED DESCRIPTION

[0030] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0031] like Figure 1-10 As shown, an embodiment of the present invention provides a nut tapping machine, including a base plate 1, a main body 2 is fixedly connected to the upper surface of the base plate 1, a discharge port 3 is fixedly connected to the inner side of the main body 2, a fixing plate 9 is fixedly connected to the rear end of the base plate 1, an adjusting device 4 is arranged on the upper surface of the fixing plate 9, a limiting device 7 is arranged on the inner side of the main body 2, a vibration device 5 is arranged on the inner side of the base plate 1 near the main body 2, a pushing device 6 is arranged on the inner side of the main body 2 and at the right end of the vibration device 5, and a collecting box 8 is movably connected to the inner side of the main body 2 near the left end.

[0032] The pushing device 6 includes a first slide bar 601, a first spring 602, a pushing block 603, a first inclined block 604 and a first limiting rod 605. The pushing block 603 is slidably connected to the inner surface of the base plate 1, one end of the first slide bar 601 is fixedly connected to the right side surface of the pushing block 603, and the other end of the first slide bar 601 is slidably connected to the inner surface of the base plate 1. The first spring 602 is sleeved on the side surface of the first slide bar 601, one end of the first spring 602 is fixedly connected to the right side surface of the pushing block 603, and the other end of the first spring 602 is fixedly connected to the inner surface of the base plate 1. The first inclined block 604 is fixedly connected to the front side surface of the pushing block 603, and the first limiting rod 605 is slidably connected to the inner surface of the main body 2, and the lower end of the first limiting rod 605 contacts the inclined surface of the first inclined block 604.

[0033] The push block 603 is provided with multiple tapping operations that can be performed simultaneously. The surface of the push block 603 that pushes out the nut blank is an inclined surface to prevent the bolt blank falling from the discharge port 3 from getting stuck in the push block 603. When the push block 603 moves to the rotating plate 509, it will press the rotating plate 509 to prevent the rotating plate 509 from flipping over.

[0034] The vibration device 5 includes a second slide bar 501, a second spring 502, a tooth plate 503, a second inclined surface block 504, a rotating drum 505, a gear 506, a connecting rod 507, a vibration plate 508, a rotating plate 509, a limiting round rod 510, a weight block 511 and a second limiting rod 512. One end of the second slide bar 501 is slidably connected to the inner surface of the bottom plate 1, and the other end of the second slide bar 501 is fixedly connected to the right end of the tooth plate 503. The second spring 502 is sleeved on the side surface of the second slide bar 501, one end of the second spring 502 is fixedly connected to the inner surface of the bottom plate 1, and the other end of the second spring 502 is fixedly connected to the right end of the tooth plate 503. The left end of the tooth plate 503 is fixedly connected to the right end of the second inclined surface block 504. The rotating drum 505 rotates The gear 506 is rotatably connected to the inner surface of the second inclined plane block 504, the gear 506 is rotatably connected to the inner surface of the base plate 1, the tooth plate 503 is meshed with the gear 506, and a latch is fixedly connected to the edge of the gear 506. The connecting rod 507 is movably connected to the side surface of the gear 506 through the latch, and the other end of the connecting rod 507 is movably connected to the inner surface of the vibration plate 508. The vibration plate 508 is slidably connected to the inner surface of the base plate 1, the limiting round rod 510 is fixedly connected to the inner surface of the rotating plate 509, and the rotating plate 509 is movably connected to the inner surface of the vibration plate 508 through the limiting round rod 510. The weight block 511 is fixedly connected to the lower side of the rotating plate 509 and is located at the right end of the rotating plate 509. The second limiting rod 512 is fixedly connected to the inner surface of the base plate 1.

[0035] The weight of the weight block 511 is greater than the weight of the rotating plate 509 on the other side of the limiting rod 510, and is blocked by the second limiting rod 512 and is in a closed state when there is no nut blank pressing on it.

[0036] The limiting device 7 includes a third moving block 701, a first limiting inclined block 702, a first moving rod 703, an electric push rod 704, a second limiting inclined block 705, a limiting bar 706, a third sliding rod 707, a third spring 708 and a sliding limiting plate 709. The third moving block 701 is slidably connected to the inner surface of the main body 2, the upper end of the first moving rod 703 is fixedly connected to the lower surface of the third moving block 701 near the front end, the first limiting rod 605 is fixedly connected to the right side surface of the third moving block 701 near the front end, the lower end of the sliding limiting plate 709 is fixedly connected to the upper surface of the bottom plate 1, the upper end of the sliding limiting plate 709 is slidably connected to the inner surface of the third moving block 701, and the output end of the electric push rod 704 is fixedly connected to the lower surface of the third moving block 701 near the front end. The third sliding bar 707 is slidably connected to the upper surface of the third moving block 701, the lower end of the third sliding bar 707 is fixedly connected to the upper surface of the second limiting inclined block 705, the limiting bar 706 is fixedly connected to the right side surface of the second limiting inclined block 705, the second limiting inclined block 705 is slidably connected to the inner surface of the third moving block 701 through the limiting bar 706, the third spring 708 is sleeved on the side surface of the third sliding bar 707, the upper end of the third spring 708 is fixedly connected to the inner surface of the third moving block 701, the lower end of the third spring 708 is fixedly connected to the upper surface of the second limiting inclined block 705, and the lower end of the first limiting inclined block 702 is fixedly connected to the upper surface of the base plate 1.

[0037] The opening on the sliding limit plate 709 is relatively large, so that the tapping head 407 can pass through the opening on the sliding limit plate 709 when the tapping device 406 adjusts its position, and at the same time, the nut can be limited to a certain extent. The electric push rod 704 is an existing device, which drives the screw rod to perform lifting operations through the internal motor.

[0038] The adjusting device 4 includes a first moving block 401, a motor 402, a first screw rod 403, a second moving block 404, a second screw rod 405, a tapping device 406, a tapping head 407, a rotating handle 408, a limiting slide rod 409, a third screw rod 410, a worm wheel 411 and a worm 412. The motor 402 is fixedly connected to the rear surface of the fixed plate 9, the first screw rod 403 passes through the right end of the fixed plate 9 and is fixedly connected to the output end of the motor 402, the first screw rod 403 is rotatably connected to the inner surface of the fixed plate 9, the first moving block 401 is threadedly connected to the side surface of the first screw rod 403, the first moving block 401 is slidably connected to the inner surface of the fixed plate 9, the upper end of the limiting slide rod 409 is fixedly connected to the lower surface of the second moving block 404, and the lower end of the limiting slide rod 409 is slidably connected to the first The inner surface of a moving block 401, the upper end of the third screw rod 410 is fixedly connected to the lower surface of the second moving block 404, the worm wheel 411 is threadedly connected to the side surface of the third screw rod 410, the worm 412 is rotatably connected to the inner surface of the first moving block 401, the rotating handle 408 is fixedly connected to one end of the worm 412 located on the outside of the first moving block 401, the worm wheel 411 is threadedly connected to the worm 412, the second moving block 404 is movably connected to the inner surface of the first moving block 401, the second screw rod 405 is rotatably connected to the inner surface of the second moving block 404, the lower end of the tapping device 406 is slidably connected to the inner surface of the second moving block 404, the tapping device 406 is threadedly connected to the side surface of the second screw rod 405, and the tapping head 407 is arranged on the inner surface of the tapping device 406.

[0039] The tapping head 407 can be disassembled and replaced on the tapping device 406 to act on nut blanks of different sizes. The tapping device 406 is an existing device that can tap the nut blank, and the tapping device 406 cooperates with the motor 402 through an external system to tap the nut blank.

[0040] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A nut tapping machine, comprising a base plate (1), characterized in that: The upper surface of the bottom plate (1) is fixedly connected to a main body (2), the inner side of the main body (2) is fixedly connected to a discharge port (3), the rear end of the bottom plate (1) is fixedly connected to a fixing plate (9), the upper surface of the fixing plate (9) is provided with an adjustment device (4), the inner side of the main body (2) is provided with a limiting device (7), the inner side of the bottom plate (1) is provided with a vibration device (5) at a position close to the main body (2), the inner side of the main body (2) and at a position at the right end of the vibration device (5) is provided with a pushing device (6), and the inner side of the main body (2) is movably connected to a collection box (8) near the left end.

2. A nut tapping machine according to claim 1, characterized in that: The pushing device (6) comprises a first sliding rod (601), a first spring (602), a pushing block (603), a first inclined block (604) and a first limiting rod (605); the pushing block (603) is slidably connected to the inner surface of the bottom plate (1); one end of the first sliding rod (601) is fixedly connected to the right side surface of the pushing block (603); the other end of the first sliding rod (601) is slidably connected to the inner surface of the bottom plate (1); the first spring (602) is sleeved on the first The first spring (602) is fixedly connected to the side surface of the sliding rod (601), one end of the first spring (602) is fixedly connected to the right side surface of the pushing block (603), the other end of the first spring (602) is fixedly connected to the inner surface of the bottom plate (1), the first inclined surface block (604) is fixedly connected to the front side surface of the pushing block (603), the first limiting rod (605) is slidably connected to the inner surface of the main body (2), and the lower end of the first limiting rod (605) is in contact with the inclined surface of the first inclined surface block (604).

3. A nut tapping machine according to claim 1, characterized in that: The vibration device (5) comprises a second sliding bar (501), a second spring (502), a toothed plate (503), a second inclined surface block (504), a rotating roller (505), a gear (506), a connecting rod (507), a vibration plate (508), a rotating plate (509), a limiting round rod (510), a weight block (511) and a second limiting rod (512), one end of the second sliding bar (501) is slidably connected to the inner surface of the bottom plate (1), the other end of the second sliding bar (501) is fixedly connected to the right end of the toothed plate (503), the second spring (502) is sleeved on the side surface of the second sliding bar (501), one end of the second spring (502) is fixedly connected to the inner surface of the bottom plate (1), the other end of the second spring (502) is fixedly connected to the right end of the toothed plate (503), the left end of the toothed plate (503) is fixedly connected to the right end of the second inclined surface block (504), the rotating roller (505) ) is rotatably connected to the inner surface of the second inclined surface block (504), the gear (506) is rotatably connected to the inner surface of the bottom plate (1), the toothed plate (503) is meshed with the gear (506), a latch is fixedly connected to the edge of the gear (506), the connecting rod (507) is movably connected to the side surface of the gear (506) through the latch, and the other end of the connecting rod (507) is movably connected to the inner surface of the vibration plate (508), and the vibration plate ( The first and second limit rods (512) are fixedly connected to the inner surface of the bottom plate (1), the first limit rod (510) is fixedly connected to the inner surface of the rotating plate (509), the rotating plate (509) is movably connected to the inner surface of the vibration plate (508) through the limit rod (510), the weight block (511) is fixedly connected to the lower side of the rotating plate (509) and is located at the right end of the rotating plate (509), and the second limit rod (512) is fixedly connected to the inner surface of the bottom plate (1).

4. A nut tapping machine according to claim 2, characterized in that: The limiting device (7) comprises a third moving block (701), a first limiting inclined block (702), a first moving rod (703), an electric push rod (704), a second limiting inclined block (705), a limiting strip (706), a third sliding rod (707), a third spring (708) and a sliding limiting plate (709), wherein the third moving block (701) is slidably connected to the inner surface of the main body (2), the upper end of the first moving rod (703) is fixedly connected to the lower surface of the third moving block (701) near the front end, the first limiting rod (605) is fixedly connected to the right side surface of the third moving block (701) near the front end, the lower end of the sliding limiting plate (709) is fixedly connected to the upper surface of the bottom plate (1), the upper end of the sliding limiting plate (709) is slidably connected to the inner surface of the third moving block (701), and the output of the electric push rod (704) is The third sliding rod (707) is slidably connected to the inner surface of the third moving block (701), the lower end of the third sliding rod (707) is fixedly connected to the upper surface of the second limiting inclined block (705), the limiting bar (706) is fixedly connected to the right side surface of the second limiting inclined block (705), the second limiting inclined block (705) is slidably connected to the inner surface of the third moving block (701) through the limiting bar (706), the third spring (708) is sleeved on the side surface of the third sliding rod (707), the upper end of the third spring (708) is fixedly connected to the inner surface of the third moving block (701), the lower end of the third spring (708) is fixedly connected to the upper surface of the second limiting inclined block (705), and the lower end of the first limiting inclined block (702) is fixedly connected to the upper surface of the bottom plate (1).

5. A nut tapping machine according to claim 1, characterized in that: The adjusting device (4) comprises a first moving block (401), a motor (402), a first screw (403), a second moving block (404), a second screw (405), a tapping device (406), a tapping head (407), a rotating handle (408), a limiting slide rod (409), a third screw (410), a worm wheel (411) and a worm (412), wherein the motor (402) is fixedly connected to the rear surface of the fixing plate (9), and the first screw (403) penetrates through the fixing plate (9). The right end of the fixed plate (9) is fixedly connected to the output end of the motor (402); the first screw rod (403) is rotatably connected to the inner surface of the fixed plate (9); the first moving block (401) is threadedly connected to the side surface of the first screw rod (403); the first moving block (401) is slidably connected to the inner surface of the fixed plate (9); the upper end of the limiting slide rod (409) is fixedly connected to the lower surface of the second moving block (404); the lower end of the limiting slide rod (409) is slidably connected to the inner surface of the fixed plate (9); The third screw rod (410) is connected to the inner surface of the first moving block (401), the upper end of the third screw rod (410) is fixedly connected to the lower surface of the second moving block (404), the worm wheel (411) is threadedly connected to the side surface of the third screw rod (410), the worm (412) is rotatably connected to the inner surface of the first moving block (401), the rotating handle (408) is fixedly connected to one end of the worm (412) located outside the first moving block (401), and the worm wheel (411) and the worm (412) are connected to each other. 12) threaded connection, the second movable block (404) is movably connected to the inner surface of the first movable block (401), the second screw rod (405) is rotatably connected to the inner surface of the second movable block (404), the lower end of the tapping device (406) is slidably connected to the inner surface of the second movable block (404), the tapping device (406) is threadedly connected to the side surface of the second screw rod (405), and the tapping head (407) is arranged on the inner surface of the tapping device (406).

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