CN221935898U - Screw tightening equipment - Google Patents

Abstract

The utility model relates to the technical field of production equipment, and discloses a screw-tightening device, which includes: a base; a limiting structure, which is fixedly connected to the upper end surface of the base, and the position between the limiting structure and the base is defined as a processing position; a track, a part of which is located at the processing position, suitable for transporting accompanying tooling to the processing position, and the accompanying tooling is suitable for carrying a cover plate and a motor housing; a lifting mechanism, which is located at the processing position and suitable for lifting the accompanying tooling, so that the cover plate and the motor housing are clamped by the limiting structure and the accompanying tooling; a screw-tightening mechanism, which is arranged on the upper end surface of the base. The screw-tightening device provided by the utility model, by arranging a limiting structure at the processing position, so that when the lifting structure lifts the accompanying tooling, the limiting structure and the accompanying tooling clamp the assembled cover plate and the motor housing, thereby forming a limit on the relative position of the cover plate and the motor housing, thereby avoiding the eccentricity problem when the screws are screwed into the cover plate and the motor housing.

Description

Screw tightening equipment

Technical Field

The utility model relates to the technical field of production equipment, in particular to a screw tightening device.

Background Art

Automobile wipers are devices that use a connecting rod mechanism to convert the rotational motion of the motor into the reciprocating motion of the wiper arm, thereby achieving the wiper action. Among them, the cover plate is an important component of the automobile wiper motor. The assembly and tightening process of the motor housing and the cover plate directly affects the overall quality of the wiper motor. After the motor housing and the cover plate are assembled and tightened by screws, there is a problem of eccentricity between the cover plate hole and the motor housing screw hole, which leads to a high defect rate during tightening, affecting the production quality of the wiper motor.

Utility Model Content

In view of this, the utility model provides a screw tightening device to solve the problem of eccentricity between the cover plate hole and the motor housing screw hole when tightening the screw.

The utility model provides a screw tightening device, comprising:

Base;

The limiting structure is fixedly connected to the upper end surface of the base, and the position between the limiting structure and the base is defined as the processing position;

Track, part of which is located at the processing position. The track is suitable for transporting the accompanying tooling to the processing position. The accompanying tooling is suitable for carrying the assembled cover plate and motor housing;

A lifting mechanism is located at the processing position, and the lifting mechanism is suitable for lifting the accompanying tooling, so that the cover plate and the motor housing are clamped by the limiting structure and the accompanying tooling, and the limiting structure is suitable for limiting the relative displacement of the cover plate and the motor housing;

The screw-tightening mechanism is arranged on the upper end surface of the base, and is suitable for screwing the screws into the cover plate and the motor housing.

Beneficial effect: By setting a limiting structure at the processing position, when the accompanying tooling is lifted up by the lifting structure, the limiting structure and the accompanying tooling clamp the assembled cover plate and motor housing, thereby limiting the relative position of the cover plate and the motor housing, thereby avoiding eccentricity when screwing the screws into the cover plate and the motor housing.

In an optional embodiment, the limiting structure includes a contoured tooling, and a local area of the side of the contoured tooling close to the cover plate is recessed to form a cover plate groove, and the size of the cover plate groove is adapted to the size of the cover plate.

Beneficial effect: by setting a cover plate groove on the contoured tooling, and after the cover plate is lifted up, at least a part of the area falls into the cover plate groove, so that the cover plate groove forms a limit for the cover plate, which is beneficial to improve the reliability of the limit structure in limiting the displacement of the cover plate relative to the motor housing.

In an optional embodiment, the side wall of the cover plate groove intersects with the side surface of the contoured tooling close to the cover plate to form an arcuate surface, and the arcuate surface is suitable for guiding the cover plate into the cover plate groove.

Beneficial effect: When the cover is lifted up, an arc surface is formed by the intersection of the side wall of the cover groove and the side of the contoured tooling, so that when the cover deviates from the correct position, the abutment and guiding effect of the arc surface can make at least part of the cover fall into the cover groove.

In an optional embodiment, a shell threaded hole is opened on the motor shell, and the cover plate is penetrated at the position corresponding to the shell threaded hole to form a cover plate hole, and the cover plate hole and the shell threaded hole are suitable for screwing in screws to form a fixed connection between the cover plate and the motor shell.

In an optional embodiment, a through hole is formed through the position of the contoured tooling corresponding to the cover plate hole, the screw tightening mechanism includes a rotating rod, and the through hole is suitable for making way for the rotating rod and the screw.

Beneficial effect: A through hole is provided at a position of the profiling tooling corresponding to the cover plate hole to make way for the rotating rod and the screw, thereby facilitating the screwing mechanism to screw the screw into the cover plate hole and the outer shell threaded hole.

In an optional embodiment, the limiting structure also includes two symmetrically arranged fixing plates, which are arranged in the transverse direction and abut against the side of the profiling tooling close to the cover plate; a pressure plate is also connected to the fixing plate, and the pressure plate is suitable for abutting against the side of the profiling tooling away from the cover plate.

In an optional embodiment, a local area of the side of the contoured tooling close to the pressure plate is recessed to form a groove; the pressure plate is rotatably connected to the fixed plate, and the pressure plate has a first state of abutting against the groove, and a second state of being separated from the groove.

Beneficial effect: The pressure plate is rotatably connected to the fixed plate and has a first state of abutting against the groove and a second state of being disengaged from the groove, so that when the pressure plate is in the second state, different specifications of contoured tooling can be replaced, thereby improving the convenience of replacing the contoured tooling and improving the applicability of the screw-driving equipment.

In an optional embodiment, the limiting structure further includes at least two symmetrically arranged support rods, one end of the support rod is fixedly connected to the base, and the other end of the support rod is fixedly connected to the fixed plate, and the support rod is suitable for supporting the fixed plate.

In an optional embodiment, the number of support rods matches the number of fixing plates, and each fixing plate is fixedly connected to at least one support rod.

In an optional implementation, a sealing ring is provided between the cover plate and the motor housing.

Beneficial effect: By setting a sealing ring between the cover plate and the motor housing, the sealing of the wiper motor is improved, and the relative displacement between the cover plate and the motor housing is reduced when the cover plate and the motor housing are transported to the processing position by the accompanying tooling.

BRIEF DESCRIPTION OF THE DRAWINGS

In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

FIG1 is an overall schematic diagram of the screw-tightening device of the utility model;

FIG2 is a partial enlarged view of point A in FIG1;

FIG3 is a top view of the screw-tightening device of the present invention;

FIG4 is a partial enlarged view of point B in FIG3;

FIG5 is a schematic diagram of the structure of the wiper motor of the utility model;

FIG6 is a three-dimensional schematic diagram of the limiting structure of the utility model;

FIG7 is a schematic diagram 1 of the utility model profiling tooling;

FIG8 is a second schematic diagram of the contour tooling of the utility model;

FIG9 is a three-dimensional schematic diagram of the screw-tightening mechanism of the present invention;

FIG. 10 is a front view of the screw-tightening mechanism of the present invention.

Description of reference numerals:

1. Base; 2. Track; 3. Traveling tooling; 4. Lifting mechanism; 5. Screw tightening mechanism; 501. Turning rod; 502. First pipeline; 503. Second pipeline; 504. First guide rail; 505. Second guide rail; 506. First sliding seat; 507. Second sliding seat; 508. Third guide rail; 509. Third sliding seat; 510. Driving motor; 511. Bracket; 512. Fixing frame; 6. Limiting structure; 61. Support rod; 62. Fixing plate; 63. Contour tooling; 631. Groove; 632. Through hole; 633. Cover plate groove; 64. Knob; 65. Pressing plate; 7. Wiper motor; 71. Cover plate; 711. Cover plate hole; 72. Motor housing; 721. Housing threaded hole; 73. Screw; 74. Sealing ring.

DETAILED DESCRIPTION

In order to make the purpose, technical solution and advantages of the embodiment of the utility model clearer, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is a part of the embodiment of the utility model, not all the embodiments. Based on the embodiment of the utility model, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the utility model.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

In addition, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

The following describes an embodiment of the utility model in conjunction with FIG. 1 to FIG. 10 .

According to an embodiment of the utility model, a screw tightening device is provided, comprising:

Base 1;

The limiting structure 6 is fixedly connected to the upper end surface of the base 1, and the position between the limiting structure 6 and the base 1 is defined as the processing position;

Track 2, part of which is located at the processing position, and track 2 is suitable for transporting the accompanying tool 3 to the processing position, and the accompanying tool 3 is suitable for carrying the assembled cover plate 71 and the motor housing 72;

A lifting mechanism 4 is located at the processing position. The lifting mechanism 4 is suitable for lifting the accompanying tool 3 so that the cover plate 71 and the motor housing 72 are clamped by the limiting structure 6 and the accompanying tool 3. The limiting structure 6 is suitable for limiting the relative displacement of the cover plate 71 and the motor housing 72;

The screw-tightening mechanism 5 is arranged on the upper end surface of the base 1 , and the screw-tightening mechanism 5 is suitable for screwing the screws 73 into the cover plate 71 and the motor housing 72 .

The screw tightening device provided in this embodiment is provided with a limiting structure 6 at the processing position so that when the lifting mechanism 4 lifts up the accompanying tool 3, the limiting structure 6 and the accompanying tool 3 are clamped and assembled with the cover plate 71 and the motor housing 72, thereby limiting the relative position of the cover plate 71 and the motor housing 72, thereby avoiding eccentricity when the screw 73 is screwed into the cover plate 71 and the motor housing 72.

Specifically, the base 1 has an upper end surface extending in the horizontal direction, a channel extending in the horizontal direction is formed between the limiting structure 6 and the upper end surface of the base 1, and the channel position between the limiting structure 6 and the upper end surface of the base 1 is defined as the processing position.

At least part of the track 2 is arranged in the horizontal direction and passes through the channel. Preferably, the structure of the track 2 at the processing position is in contact with the upper end surface of the base 1 and is spaced apart from the limiting structure 6. A transport device and accompanying tooling 3 are arranged on the track 2. The transport device includes a belt, a rack, and a chain arranged in a direction parallel to the extension of the track 2 and rotating relative to the track 2. When the transport device is in contact with the accompanying tooling 3, the transport device is suitable for driving the accompanying tooling 3 to move along the track 2.

When the accompanying tool 3 is transported to the processing position, the lifting mechanism 4 is located below the accompanying tool 3 in the direction of gravity, so as to lift up the accompanying tool 3, so as to separate the accompanying tool 3 from the transport device, and to press the wiper motor 7 located above the accompanying tool 3 against the limiting structure 6. The wiper motor 7 includes a cover plate 71 and a motor housing 72, and the accompanying tool 3 is fixedly connected to the motor housing 72. Before the accompanying tool 3 arrives at the processing position, the operator manually places the cover plate 71 on the motor housing 72. Both the cover plate 71 and the motor housing 72 have multiple folded corners, so that the operator can align the folded corners of the cover plate 71 with the folded corners of the motor housing 72, thereby placing the cover plate 71 in the correct assembly position with the motor housing 72. The lifting mechanism 4 includes a lifting rod and a driving member arranged parallel to the direction of gravity. The driving member includes a hydraulic actuator, a pneumatic actuator, and a linear servo motor. One end of the lifting rod is fixedly connected to the driving member, and the other end extends toward the accompanying tooling. The lifting rod has a first state in which it extends relative to the driving member to lift the accompanying tooling 3 and clamp the wiper motor 7 together with the limiting structure 6, and a second state in which it is retracted relative to the driving member to allow the accompanying tooling 3 to fall back onto the conveying device and move along the track 2.

The screw-tightening mechanism 5 includes a bracket 511 extending in a direction parallel to the gravity, and the number of the bracket 511 includes at least one. One end of the bracket 511 is fixedly connected to the upper end surface of the base 1, and the fixed connection method includes welding, pin connection, and bolt connection. The other end is fixedly connected to the first guide rail 504 extending in the horizontal direction, and the bracket 511 is suitable for supporting and fixing the first guide rail 504. The screw-tightening mechanism 5 also includes a second guide rail 505 extending in the horizontal direction. The extension direction of the second guide rail 505 is perpendicular to the extension direction of the first guide rail 504. A first sliding seat 506 is arranged between the second guide rail 505 and the first guide rail 504. The first sliding seat 506 is slidably connected to the first guide rail 504 and fixedly connected to the second guide rail 505. The second guide rail 505 is suitable for sliding relative to the first guide rail 504 along the extension direction of the first guide rail 504 through the first sliding seat 506. The screw-tightening mechanism 5 further includes a third guide rail 508 extending in parallel to the direction of gravity, a second sliding seat 507 is provided between the third guide rail 508 and the second guide rail 505, the second sliding seat 507 is slidably connected to the second guide rail 505, and is fixedly connected to the third guide rail 508, and the third guide rail 508 is suitable for sliding relative to the second guide rail 505 along the extension direction of the second guide rail 505 through the second sliding seat 507. The screw-tightening mechanism 5 further includes a fixing frame 512, a third sliding seat 509 is provided between the fixing frame 512 and the third guide rail 508, the third sliding seat 509 is slidably connected to the third guide rail 508, and is fixedly connected to the fixing frame 512, and the fixing frame 512 is suitable for sliding relative to the third guide rail 508 along the extension direction of the third guide rail 508 through the third sliding seat 509. Drivers are fixedly connected to the first guide rail 504, the second guide rail 505, and the third guide rail 508, respectively. The drivers include hydraulic actuators, cylinders, and linear servo motors. The output rods of the three drivers are connected to the first sliding seat 506, the second sliding seat 507, and the third sliding seat 509, respectively, so as to drive the first sliding seat 506 to move along the first guide rail 504, the second sliding seat 507 to move along the second guide rail 505, and the third sliding seat 509 to move along the third guide rail 508. The screw-tightening mechanism 5 also includes a rotating rod 501 and a second pipeline 503. The rotating rod 501 and the second pipeline 503 extend in a direction parallel to the gravity. The rotating rod 501 is rotatably connected to the fixed frame 512. The rotating rod 501 is driven by a driving motor fixedly connected to the fixed frame 512. The driving motor includes a hydraulic motor, a pneumatic motor, and an electric motor. The end of the rotating rod 501 close to the base 1 is inserted into the second pipeline 503 and is coaxially fixedly connected with a screwdriver. The specifications of the screwdriver are compatible with the screw 73. The screw-tightening mechanism 5 also includes a first pipeline 502, which extends in an obliquely downward direction and is connected to the second pipeline 503, so as to be suitable for feeding the screw 73 in the first pipeline 502 into the second pipeline 503. The screw-tightening mechanism 5 is suitable for moving the screwdriver to the position where the screw is to be tightened by sliding the second guide rail 505 relative to the first guide rail 504, the third guide rail 508 relative to the second guide rail 505, and the fixing frame 512 relative to the third guide rail 508. Preferably, the screw-tightening mechanism 5 also has a displacement sensor or a visual sensor, and is electrically connected to the driver, and the position of the screwdriver is detected by the displacement sensor or the visual sensor, so as to move the screwdriver to the position where the screw is to be tightened.

In some embodiments, as shown in FIGS. 1 to 8 , the limiting structure 6 includes a contoured tooling 63 , and a local area of the side of the contoured tooling 63 close to the cover plate 71 is recessed to form a cover plate groove 633 , and the size of the cover plate groove 633 is adapted to the size of the cover plate 71 .

The screw-tightening device provided in this embodiment is configured with a cover plate groove 633 on the contoured tooling 63, and after the cover plate 71 is lifted up, at least a portion of the area falls into the cover plate groove 633, so that the cover plate groove 633 limits the cover plate 71, which is beneficial to improving the reliability of the limiting structure 6 in limiting the displacement of the cover plate 71 relative to the motor housing 72.

Specifically, there is a gap between the contour tooling 63 and the upper end surface of the base 1. When the accompanying tooling 3 is transported to the processing position, the contour tooling 63 is located above the accompanying tooling 3 along the gravity direction. The contour tooling 63 is close to the side of the accompanying tooling 3, and the regional groove corresponding to the cover plate 71 forms a cover plate groove 633. The size of the cover plate groove 633 is adapted to the size of the cover plate 71. After the accompanying tooling 3 is lifted by the lifting mechanism 4, the cover plate 71 and the motor housing 72 rise as the accompanying tooling 3 is lifted, and at least a part of the cover plate 71 falls into the cover plate groove 633, so that the cover plate groove 633 forms a limit on the cover plate 71 in the horizontal direction, thereby preventing the cover plate 71 from being displaced relative to the motor housing 72 during the process of screwing.

As a modified implementation form, the size of the cover plate groove 633 is larger than the size of the cover plate 71, and a limit block is fixedly connected in the cover plate groove 633, and the limit block extends in the direction of gravity. In the direction of gravity, the projection of the limit block contacts the outer edge of the projection of the cover plate 71, and is distributed around the outer edge of the projection of the cover plate 71. After the accompanying tool 3 is lifted up, the side wall of the cover plate 71 abuts against the side wall of the limit block in the horizontal direction, so that the limit block limits the cover plate 71 in the horizontal direction, preventing the cover plate 71 from being displaced relative to the motor housing 72 during the process of screwing the screws.

In some embodiments, as shown in FIGS. 1 to 8 , the side wall of the cover plate groove 633 intersects with the side surface of the contoured tooling 63 close to the cover plate 71 to form an arcuate surface, which is suitable for guiding the cover plate 71 into the cover plate groove 633 .

The screw tightening device provided in this embodiment forms an arc surface through the intersection of the side wall of the cover plate groove 633 and the side surface of the contoured tooling 63 during the process of the cover plate 71 being lifted up, so that when the cover plate 71 deviates from the correct position, at least a part of the cover plate 71 can fall into the cover plate groove 633 through the abutment and guiding effect of the arc surface.

Specifically, the side wall of the cover plate groove 633 and the side of the profiling tooling 63 near the opening of the cover plate groove 633 intersect to form an arc surface. In the process of the accompanying tooling 3 being lifted up, the cover plate 71 moves toward the direction close to the profiling tooling 63. When the cover plate 71 deviates from the correct assembly position, the cover plate 71 abuts against the arc surface during the rising process close to the profiling tooling 63, and slides along the arc surface relative to the profiling tooling 63, so as to slide along the arc surface and fall into the cover plate groove 633, so that the cover plate 71 returns to the correct assembly position and is restricted by the cover plate groove 633 in the relative displacement with the motor housing 72 in the horizontal direction. In addition, the side wall of the cover plate groove 633 and the side of the profiling tooling 63 near the opening of the cover plate groove 633 can also intersect to form an inclined surface, and the cover plate 71 is suitable for sliding along the inclined surface and falling into the cover plate groove 633.

In some embodiments, in combination with Figures 1 to 10, a shell threaded hole 721 is opened on the motor housing 72, and the cover plate 71 is penetrated to form a cover plate hole 711 at the position corresponding to the shell threaded hole 721. The cover plate hole 711 and the shell threaded hole 721 are suitable for screwing in the screw 73 to form a fixed connection between the cover plate 71 and the motor housing 72.

In some embodiments, as shown in FIGS. 1 to 10 , the contoured tooling 63 is penetrated to form a through hole 632 corresponding to the position of the cover plate hole 711 , and the screw tightening mechanism 5 includes a rotating rod 501 , and the through hole 632 is suitable for making way for the rotating rod 501 and the screw 73 .

The screw tightening device provided in this embodiment provides a through hole 632 at a position of the contoured tooling 63 corresponding to the cover plate hole 711 to make way for the rotating rod 501 and the screw 73, thereby facilitating the screw tightening mechanism 5 to screw the screw 73 into the cover plate hole 711 and the outer shell threaded hole 721.

Specifically, after the accompanying tooling is lifted up and the cover plate groove 633 forms a limit on the cover plate 71, the second pipeline 503 moves to a position where its axis coincides with the axis of the cover plate hole 711 and the outer shell threaded hole 721, and the screw 73 in the first pipeline 502 falls into the cover plate hole 711 and the outer shell threaded hole 721 through the second pipeline 503. At this time, the rotating rod 501 moves along the direction of gravity through the third sliding seat 509, thereby driving the screwdriver to fall, and drives the screwdriver to rotate through the driving motor 510, so that the screwdriver screws the screw 73 into the cover plate hole 711 and the outer shell threaded hole 721, thereby forming a fixed connection between the cover plate 71 and the motor housing 72.

In some embodiments, in combination with Figures 1 to 8, the limiting structure 6 also includes two symmetrically arranged fixing plates 62, which are arranged in the transverse direction, and the fixing plates 62 abut against the side of the contour tooling 63 close to the cover plate 71; a pressing plate 65 is also connected to the fixing plate 62, and the pressing plate 65 is suitable for abutting against the side of the contour tooling 63 away from the cover plate 71.

Specifically, there is a distance between the two fixing plates 62, and the distance between the two fixing plates 62 is larger than the size of the cover plate groove 633. The fixing plates 62 abut against the side of the profiling tooling 63 close to the cover plate 71, so that the fixing plates 62 support the profiling tooling 63. The pressing plate 65 abuts against the side of the profiling tooling 63 away from the cover plate 71, so that the fixing plates 62 and the pressing plate 65 support and fix the profiling tooling 63.

In some embodiments, as shown in Figures 1 to 8, a local area of the side of the contoured tooling 63 close to the pressure plate 65 is recessed to form a groove 631; the pressure plate 65 is rotatably connected to the fixed plate 62, and the pressure plate 65 has a first state of abutting against the groove 631, and a second state of being separated from the groove 631.

The screw-tightening device provided in this embodiment is rotatably connected to the fixing plate 62 via the pressing plate 65, and has a first state in which it abuts against the groove 631, and a second state in which it is disengaged from the groove 631, so that when the pressing plate 65 is in the second state, different specifications of the contoured tooling 63 can be replaced, thereby improving the convenience of replacing the contoured tooling 63 and improving the applicability of the screw-tightening device.

Specifically, the rotation plane of the pressing plate 65 is parallel to the plane where the fixed plate 62 is located. When the pressing plate 65 is in the first state, the pressing plate 65 abuts against the groove 631. At this time, the fixed plate 62 and the pressing plate 65 support and fix the contour tooling 63; when the pressing plate 65 is in the second state, the pressing plate 65 is separated from the groove 631. At this time, the contour tooling 63 can be separated from the fixed plate 62, so that the operator can replace the contour tooling 63 of different specifications, thereby improving the applicability of the screw tightening device. The side of the pressing plate 65 away from the fixed plate 62 is also fixedly connected with a knob 64. The fixed connection forms include bolt connection, pin connection, and bonding. The outer peripheral wall of the knob 64 is provided with a circle of tooth grooves, which is conducive to increasing the friction between the hand or other tools and the knob 64, thereby improving the reliability of the operator turning the pressing plate 65 through the knob 64.

In some embodiments, in combination with Figures 1 to 8, the limiting structure 6 also includes at least two symmetrically arranged support rods 61, one end of the support rod 61 is fixedly connected to the base 1, and the other end is fixedly connected to the fixed plate 62, and the support rod 61 is suitable for supporting the fixed plate 62.

Preferably, the support rod 61 extends in parallel to the direction of gravity to support and fix the fixing plate 62, and the fixing connection forms include integral molding, bolt connection, and pin connection.

In some embodiments, as shown in FIGS. 1 to 8 , the number of support rods 61 matches the number of fixing plates 62 , and each fixing plate 62 is fixedly connected to at least one support rod 61 .

Preferably, the plurality of support rods 61 on each fixing plate 62 are equidistantly distributed. In the horizontal direction, the spacing between the support rods 61 respectively located on two fixing plates 62 is larger than the size of the track 2, larger than the size of the accompanying tooling 3, and larger than the size of the wiper motor 7.

In some embodiments, as shown in FIGS. 1 to 8 , a sealing ring 74 is disposed between the cover plate 71 and the motor housing 72 .

The screw tightening device provided in this embodiment improves the sealing of the wiper motor 7 by setting a sealing ring 74 between the cover plate 71 and the motor housing 72, and reduces the relative displacement between the cover plate 71 and the motor housing 72 when the cover plate 71 and the motor housing 72 are transported to the processing position by the accompanying tooling 3.

Specifically, the sealing ring 74 is made of rubber or leather and has a large friction coefficient, thereby reducing the relative displacement of the cover plate 71 and the motor housing 72 during the process of being transported to the processing position by the accompanying tooling 3, and improving the sealing of the wiper motor 7 after the cover plate 71 and the motor housing 72 are fixedly connected via screws 73.

Obviously, the above embodiments are only examples for clear explanation, and are not intended to limit the implementation methods. Although the embodiments of the present utility model are described in conjunction with the accompanying drawings, those skilled in the art may make various modifications and variations without departing from the spirit and scope of the present utility model, and such modifications and variations are all within the scope defined by the present utility model.

Claims (10)

1. A screw driving apparatus, comprising:

A base (1);

The limiting structure (6) is fixedly connected with the upper end face of the base (1), and the position between the limiting structure (6) and the base (1) is defined as a processing position;

A track (2) with a partial area at the processing station, the track (2) being adapted to transport a pallet (3) to the processing station, the pallet (3) being adapted to carry an assembled cover plate (71) and motor housing (72);

The jacking mechanism (4) is positioned at the processing position, the jacking mechanism (4) is suitable for jacking the follow-up tool (3) so as to clamp the cover plate (71) and the motor housing (72) by the limiting structure (6) and the follow-up tool (3), and the limiting structure (6) is suitable for limiting the relative displacement of the cover plate (71) and the motor housing (72);

The screw screwing mechanism (5) is arranged on the upper end face of the base (1), and the screw screwing mechanism (5) is suitable for screwing screws (73) into the cover plate (71) and the motor shell (72).

2. Screw driving device according to claim 1, characterized in that the limit structure (6) comprises a profiling tool (63), wherein a cover plate groove (633) is formed by the profiling tool (63) being recessed near a side surface local area of the cover plate (71), and the size of the cover plate groove (633) is matched with the size of the cover plate (71).

3. The screw tightening device according to claim 2, characterized in that the side wall of the cover plate groove (633) meets the side surface of the profiling tool (63) close to the cover plate (71) to form an arc surface, which arc surface is adapted to guide the cover plate (71) into the cover plate groove (633).

4. Screw tightening device according to claim 2, characterized in that the motor housing (72) is provided with a housing screw hole (721), the cover plate (71) is provided with a cover plate hole (711) corresponding to the position of the housing screw hole (721), the cover plate hole (711) and the housing screw hole (721) are suitable for screwing in the screw (73), so that the cover plate (71) and the motor housing (72) form a fixed connection.

5. The screw tightening device according to claim 4, characterized in that the profiling tool (63) is provided with a through hole (632) corresponding to the cover plate hole (711), the screw tightening mechanism (5) comprises a rotating rod (501), and the through hole (632) is suitable for forming a abdication for the rotating rod (501) and the screw (73).

6. The screwing apparatus according to any one of claims 2 to 5, wherein the limit structure (6) further comprises two symmetrically arranged fixing plates (62), the fixing plates (62) being arranged in a transverse direction, the fixing plates (62) being in abutment with a side of the profiling tool (63) close to the cover plate (71); the fixing plate (62) is also connected with a pressing plate (65), and the pressing plate (65) is suitable for being abutted to one side, away from the cover plate (71), of the profiling tool (63).

7. The screw-driving device according to claim 6, characterized in that the profiling tool (63) is recessed to form a groove (631) near a side partial area of the pressure plate (65); the pressing plate (65) is rotatably connected with the fixing plate (62), and the pressing plate (65) is in a first state abutting against the groove (631) and in a second state separating from the groove (631).

8. Screw tightening device according to claim 6, characterized in that the limit structure (6) further comprises at least two symmetrically arranged support rods (61), one end of the support rod (61) is fixedly connected with the base (1) and the other end is fixedly connected with the fixing plate (62), and the support rods (61) are adapted to support the fixing plate (62).

9. Screw tightening device according to claim 8, characterized in that the number of support rods (61) is adapted to the number of fixing plates (62), each fixing plate (62) being fixedly connected to at least one support rod (61).

10. Screw tightening device according to claim 1, characterized in that a sealing ring (74) is arranged between the cover plate (71) and the motor housing (72).