Inclined thread preventing device for nut tapping

Abstract

The utility model discloses a nut tapping inclined tooth prevention device which comprises a base, a sliding seat and a driving assembly driving the sliding seat to move horizontally are arranged on the base, a feeding upper rail is installed above the sliding seat, two clamping blocks are installed at the front end of the sliding seat through a pin shaft in a rotating mode, the front ends of the two clamping blocks are oppositely arranged and spliced to form a nut limiting groove, and the nut limiting groove is provided with a feeding groove. The nut limiting groove is located under the upper feeding rail. Through holes are formed in the two sides of the sliding base, ejector rods are arranged in the through holes, first springs are arranged at the tail ends of the ejector rods, and the front ends of the ejector rods abut against the tail ends of the clamping blocks. The clamping blocks capable of being opened and closed are arranged at the front end of the sliding seat, and the front ends of the two clamping blocks form the nut limiting groove, so that the problem that the nut inclines when being close to a screw tap can be effectively avoided, skew threads or horizontal tapping threads are avoided, and the machining quality of the nut is guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of nut tapping, in particular to a nut tapping anti-skew device. Background Art

[0002] With the development of industry, the demand for nut fasteners is increasing, and the requirements for product quality are getting higher and higher. The accuracy and stability of nut thread are particularly important. Fig.10 As shown, in the existing nut tapping machine, the nuts are arranged vertically in the upper feed track 6. After the nuts fall down due to gravity, they are pushed to the tap 2 by the push rod 9 to complete the tapping operation. Generally, large-sized nuts are not prone to skewness during the push of the push rod, and the defective rate is relatively low. However, small-sized thin nuts, due to their light weight and thin thickness, will appear tilted in the mold groove when the push rod pushes the nut to the tap, resulting in skewed threads or horizontal tapping, resulting in defective products and economic losses. Utility Model Content

[0003] In order to solve the above problems, the utility model provides a nut tapping anti-slanting device, which can reduce the occurrence of nut bevel and improve the product yield.

[0004] To this end, the technical solution of the utility model is: a nut tapping anti-skew device, including a base, a sliding seat and a driving assembly that drives the sliding seat to translate, a feed upper track is installed above the sliding seat, and two clamping blocks are installed on the front end of the sliding seat through a pin shaft, and the front ends of the two clamping blocks are arranged facing each other and assembled into a nut limiting groove, and the nut limiting groove is located directly below the feed upper track; through holes are provided on both sides of the sliding seat, a push rod is provided in the through hole, a first spring is provided at the end of the push rod, and the front end abuts against the end of the clamping block.

[0005] On the basis of the above scheme and as a preferred scheme of the above scheme: the first spring at the end of the push rod is in a compressed state, the push rod applies an outward force to the end of the clamping block, and the front ends of the two clamping blocks are buckled inward to form a nut limiting groove.

[0006] On the basis of the above scheme and as a preferred scheme of the above scheme: a slideway for the sliding seat to move is provided on the base, and a material discharge chute is provided in the middle of the base, and a material discharge port is provided in the middle of the material discharge chute.

[0007] On the basis of the above scheme and as a preferred scheme of the above scheme: a tap and a tapping motor for driving the tap to rotate are provided on one side of the base, and the tap is opposite to the middle position of the nut limiting groove.

[0008] On the basis of the above scheme and as a preferred scheme of the above scheme: it also includes a nut limiting rod, the nut limiting rod is perpendicular to the upper feed track, the nut limiting rod is located above the tap, and when the sliding seat drives the upper feed track to move toward the screw, the end of the nut limiting rod is inserted into one of the nuts on the upper feed track.

[0009] On the basis of the above scheme and as a preferred scheme of the above scheme: the nut limiting rod is installed on a slider, the slider is slidably installed on the mounting shaft, one end of the mounting shaft is fixed on the base, and the other end is provided with a baffle; a second spring is mounted on the mounting shaft, and the second spring rests on the slider and the baffle.

[0010] Before tapping the nuts: arrange the nuts to be tapped vertically in the upper feed track, and the nuts fall due to gravity; in the absence of external force, the end of the clamping block is exerted with an outward force by the push rod, so that the front end of the clamping block is buckled inward to form a nut limiting groove, so that the nut at the bottom of the upper feed track falls into the nut limiting groove, and the clamping block can be buckled on both sides of the nut without interfering with the tapping of the middle hole of the nut.

[0011] When tapping the nut: the driving assembly drives the sliding seat to move along the slideway of the base toward the tapping side, and the tap rotates under the drive of the tapping motor, the sliding seat pushes the nut into the tap, and the rotating tap forms an internal thread in the nut hole.

[0012] After the nut is tapped, the sliding seat is driven by the driving assembly to retreat and reset, and the nut is matched with the tap thread, so the nut will not retreat. At this time, the nut will apply an outward turning force to the front end of the clamping block, so that the front ends of the two clamping blocks are opened, and the nut is separated from the nut limit groove. At this time, the rear end of the clamping block pushes the first spring. When the nut is separated, the clamping block is reset under the action of the first spring. The nut on the tap will be separated from the tap under the centrifugal force of the tap rotation, and slide down along the discharge chute in the middle of the base to the discharge port.

[0013] When tapping the nut, the nut limiting rod can be inserted into one of the nuts in the upper feed track to prevent the nuts from being squeezed too tightly and adjust the spacing of the nuts; when the sliding seat withdraws, the nut limiting rod also withdraws from the upper feed track to facilitate continued feeding of the nuts.

[0014] Compared with the prior art, the beneficial effects of the utility model are: an openable and closable clamping block is provided at the front end of the sliding seat, and the front ends of the two clamping blocks form a nut limiting groove, which can effectively prevent the nut from tilting when it is close to the tap, avoid skewed teeth or horizontal tapping of the thread, and ensure the processing quality of the nut. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural schematic diagram of Example 1;

[0016] Figure 2 It is a structural cross-sectional view of Example 1;

[0017] Figure 3 It is a partial schematic diagram of the tap and the clamping block of Example 1;

[0018] Figure 4 This is a schematic diagram of the structure of the base and the sliding seat of Example 1;

[0019] Figure 5 It is an exploded view of the parts of the sliding seat of Example 1;

[0020] Figure 6 This is a structural cross-sectional view of the sliding seat of Example 1 in the tapping state;

[0021] Figure 7 This is a structural cross-sectional view of the sliding seat of Example 1 at the end of tapping;

[0022] Figure 8 It is a structural schematic diagram of Example 2;

[0023] Fig. 9 It is a partial schematic diagram of the working state of the nut limiting rod of Example 2;

[0024] Fig.10 It is a structural schematic diagram of a nut tapping device in the prior art.

[0025] Marked in the figure are: base 1, slideway 11, unloading chute 12, tap 2, tapping motor 3, sliding seat 4, pin 41, clamping block 42, step surface 43, stopper 44, through hole 45, push rod 46, first spring 47, driving cylinder 5, feed upper rail 6, nut 7, nut limiting rod 8, slider 81, mounting shaft 82, baffle 83, second spring 84, push rod 9. DETAILED DESCRIPTION

[0026] In the description of the present invention, it should be noted that directional words, such as the terms "center", "lateral (X)", "longitudinal (Y)", "vertical (Z)", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", etc., indicating directions and positional relationships are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of narrating the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and cannot be understood as limiting the specific protection scope of the present invention.

[0027] In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features. Therefore, the definition of "first" and "second" features can explicitly or implicitly include one or more of the features. In the description of the utility model, the meaning of "several" and "a number" is two or more, unless otherwise clearly and specifically defined.

[0028] Example 1

[0029] The nut tapping anti-slanting device of this embodiment comprises a base 1, and a tap 2 and a tapping motor 3 for driving the tap 2 to rotate are provided on one side of the base 1. The base 1 is provided with a sliding seat 4 and a driving component for driving the sliding seat 4 to translate. The base 1 is provided with a slideway 11 for the sliding seat 4 to move. The driving component can use a driving cylinder 5 to push the sliding seat 4 to translate along the slideway 11 and push the nut 7 toward the side of the tap 2 to facilitate the nut tapping. At the same time, a material discharge chute 12 is provided in the middle of the base 1, and the middle of the material discharge chute 12 is a material discharge port, and the tapped nut can fall into the material discharge port along the material discharge chute.

[0030] A feed upper track 6 is installed above the front end of the sliding seat 4, and the nut 7 is vertically arranged in the feed upper track 6; two clamping blocks 42 are rotatably installed at the front end of the sliding seat 4 through a pin shaft 41, and the front ends of the two clamping blocks 42 are provided with step surfaces 43 supporting the nuts, and the two step surfaces 43 and the stop block 44 at the front end of the sliding seat 41 constitute a nut limiting groove, and the nut limiting groove is located directly below the feed upper track 6, and the tap 2 is opposite to the middle position of the nut limiting groove.

[0031] Through holes 45 are provided on both sides of the sliding seat 4, and a push rod 46 is provided in the through hole 45. A first spring 47 is provided at the end of the push rod 46, and the front end of the push rod 46 abuts against the end of the clamping block 42. The first spring 47 at the end of the push rod 46 is in a compressed state, and the push rod 46 exerts an outward force on the end of the clamping block 42, and the front ends of the two clamping blocks 42 are buckled inward, limiting the inclination of the nut 7 during the tapping stage.

[0032] Before tapping the nuts: arrange the nuts 7 to be tapped vertically in the upper feed track 6, and the nuts 7 fall down due to gravity; in the absence of external force, the end of the clamping block 42 is exerted with an outward force by the push rod 46, so that the front end of the clamping block 42 is buckled inward to form a nut limiting groove, so that the nut 7 at the bottom of the upper feed track 6 falls into the nut limiting groove, and the clamping block 42 can be buckled on both sides of the nut without interfering with the tapping of the middle hole of the nut.

[0033] When the nut is tapped: the driving cylinder 5 drives the sliding seat 4 to move along the slideway 11 of the base 1 toward the side of the tap 2, and the tap 2 rotates under the drive of the tapping motor 3, the sliding seat 4 pushes the nut 7 into the tap 2, and the rotating tap 2 forms an internal thread in the hole of the nut 7.

[0034] After the nut tapping is completed, the sliding seat 4 is driven by the driving cylinder 5 to retreat and reset, and the nut 7 is threadedly matched with the tap 2, so that the nut 7 will not retreat. At this time, the nut 7 will apply an outward turning force to the front end of the clamping block 42, so that the front ends of the two clamping blocks 42 are opened, and the nut 7 is separated from the restriction of the nut limit groove. At this time, the rear end push rod 46 of the clamping block 42 squeezes the first spring 47. When the nut 7 is separated, the clamping block 42 is reset under the action of the first spring 47. The nut 7 located on the tap 2 will be separated from the tap 2 under the centrifugal force of the tap 2 rotating, and slide down to the discharge port along the discharge chute 12 in the middle of the base 1.

[0035] Example 2

[0036] This embodiment has the same structure as the embodiment 1, except that it also includes a nut limiting rod 8 and a slider 81. The nut limiting rod 8 is mounted on the slider 81. The slider 81 is slidably mounted on the mounting shaft 82. One end of the mounting shaft 82 is fixed on the base 1, and the other end is provided with a baffle 83. The mounting shaft 82 is sleeved with a second spring 84, and the second spring 84 abuts against the slider 81 and the baffle 83. The nut limiting rod 8 is perpendicular to the upper feed track 6. The upper feed track 6 is provided with a long slot hole for the nut limiting rod 8 to be inserted. The nut limiting rod 8 is located above the tap 2. When the sliding seat 4 drives the upper feed track 6 to move toward the screw 2, the end of the nut limiting rod 8 can be inserted into one of the nuts on the upper feed track 6.

[0037] When tapping the nut, the nut limiting rod 8 can be inserted into one of the nuts 7 in the upper feed track 6 to prevent the nuts 7 from being squeezed too tightly and adjust the spacing of the nuts; when the sliding seat 4 withdraws, the nut limiting rod 8 also withdraws from the upper feed track 6, making it convenient for the nuts 7 to continue feeding.

[0038] The above is only a preferred embodiment of the present invention. The protection scope of the present invention is not limited to the above embodiments. All technical solutions under the concept of the present invention belong to the protection scope of the present invention. It should be pointed out that for ordinary technicians in this technical field, some improvements and modifications without departing from the principle of the present invention should also be regarded as the protection scope of the present invention.

Claims

1. A nut tapping anti-slanting device, characterized in that: It includes a base, on which is provided a sliding seat and a driving component for driving the sliding seat to translate, an upper feed track is installed above the sliding seat, and two clamping blocks are installed at the front end of the sliding seat by rotating through a pin shaft, and the front ends of the two clamping blocks are arranged facing each other and assembled into a nut limiting groove, and the nut limiting groove is located directly below the upper feed track; through holes are provided on both sides of the sliding seat, a push rod is provided in the through hole, a first spring is provided at the end of the push rod, and the front end abuts against the end of the clamping block.

2. A nut tapping anti-skewing device according to claim 1, characterized in that: The first spring at the end of the push rod is in a compressed state, and the push rod applies an outward force to the end of the clamping block, and the front ends of the two clamping blocks are buckled inward to form a nut limiting groove.

3. A nut tapping anti-slanting device according to claim 1, characterized in that: The base is provided with a slideway for the sliding seat to move, and a material discharge chute is provided in the middle of the base, and a material discharge opening is provided in the middle of the material discharge chute.

4. A nut tapping anti-slanting device according to claim 1, characterized in that: A thread tap and a tapping motor for driving the thread tap to rotate are arranged on one side of the base, and the thread tap is opposite to the middle position of the nut limiting groove.

5. A nut tapping anti-slanting device as claimed in claim 4, characterized in that: It also includes a nut limiting rod, which is perpendicular to the upper feed track and located above the tap. When the sliding seat drives the upper feed track to move toward the screw, the end of the nut limiting rod is inserted into one of the nuts on the upper feed track.

6. A nut tapping anti-slanting device as claimed in claim 5, characterized in that: The nut limiting rod is installed on a slider, the slider is slidably installed on the installation shaft, one end of the installation shaft is fixed on the base, and the other end is provided with a baffle; a second spring is sleeved on the installation shaft, and the second spring rests on the slider and the baffle.

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