Screwing device

Abstract

The present invention discloses a screwing device, comprising: a screwing body, which comprises a screwing rod for screwing a nut on a bolt and a first driving mechanism for driving the screwing rod to move vertically; a straightening plate, on which a vertical straightening hole is formed; a second driving mechanism, which is used to drive the straightening plate to move vertically; wherein: the lower part of the straightening hole forms a tapered hole which is smaller at the top and larger at the bottom; before the nut is sleeved on the bolt, the second driving mechanism drives the straightening plate to move downward so that the head of the bolt passes through the straightening hole and the bolt is straightened by the straightening hole.

Description

Technical Field

[0001] The invention relates to the technical field of production or assembly equipment, and in particular to a device for screwing a fastener. Background Art

[0002] At present, in the process of parts assembly, using automatic screwing devices instead of manual screwing of fasteners is beneficial to improving assembly efficiency and assembly quality. Before screwing the nut on the bolt, the bolt needs to be kept in a strict vertical state to facilitate the insertion of the workpiece to be assembled and to facilitate the screwing rod in the screwing device to be vertically opposite to the bolt so as to screw the nut on it.

[0003] In the prior art, manual straightening of the bolts is usually used to restore them to a strictly vertical state. When the workpiece to be assembled needs to be penetrated with multiple bolts at the same time, manual straightening of the multiple bolts is bound to reduce work efficiency, and the straightening operation is prone to omissions. Summary of the invention

[0004] In view of the above problems in the prior art, an object of the present invention is to provide a screwing device to solve the above problems in the prior art.

[0005] In order to achieve the above object, the present invention provides a screwing device, comprising:

[0006] A screwing body, comprising a screwing rod for screwing a nut on a bolt and a first driving mechanism for driving the screwing rod to move vertically;

[0007] A centralizing plate having a centralizing hole formed thereon;

[0008] The second driving mechanism is used to drive the vertical movement of the centralizing plate; wherein:

[0009] The lower part of the straightening hole forms a tapered hole which is smaller at the top and larger at the bottom;

[0010] Before the nut is sleeved on the bolt, the second driving mechanism drives the straightening plate to move downward so that the head of the bolt passes through the straightening hole and the bolt is straightened by the straightening hole.

[0011] Preferably, the centralizing plate is also provided with a vertical through hole; wherein:

[0012] The knob rod is opposite to the through hole and can penetrate the through hole.

[0013] Preferably, a mounting hole is provided on the centralizing plate, a bushing is provided in the mounting hole, and an inner hole of the bushing forms the centralizing hole.

[0014] Preferably, the centralizing holes include a plurality of holes, and the plurality of centralizing holes and the plurality of bolts are arranged in a circle with the same intervals.

[0015] Preferably, the screw rods include a plurality of knob rods, and the plurality of knob rods are arranged in a manner that they can align with a corresponding number of bolts at the same time.

[0016] Preferably, the screwing device further comprises a third driving mechanism; wherein:

[0017] After the straightening plate moves vertically to straighten the bolt through the straightening hole, the third driving mechanism drives the screwing rod to adjust its position to align with the bolt.

[0018] Preferably, the second driving mechanism comprises:

[0019] A mounting plate, which is located above the straightening plate, and the screw rod is installed below the mounting plate;

[0020] A telescopic cylinder is fixed below the mounting plate, and a piston rod of the telescopic cylinder is connected to the centralizing plate to drive the centralizing plate to move vertically.

[0021] Preferably, a motor is disposed on the mounting plate, and the upper end of the screw rod is connected to the motor to be driven by the motor.

[0022] Preferably, the third driving mechanism comprises:

[0023] A fixing plate, which is located above the mounting plate and connected to the mounting plate via a connecting column;

[0024] The transmission mechanism comprises a worm wheel mounted on the fixed disk and a worm for driving the worm wheel to rotate.

[0025] Preferably, the second driving mechanism comprises:

[0026] Vertical guide rails;

[0027] A slider capable of sliding along the vertical guide rail, wherein the fixed plate is fixedly connected to the slider;

[0028] The actuator is used to drive the slider to slide vertically.

[0029] Compared with the prior art, the screwing device provided by the present invention has the following advantages: by adding a straightening plate that can move vertically, the straightening plate can move downward to straighten the bolt that may be in an inclined state with the help of the straightening hole, so that the bolt can be corrected to a stricter vertical state, thereby facilitating the insertion of the workpiece to be assembled and facilitating the nut on the bolt to be embedded in the screwing rod.

[0030] In addition, the lower part of the straightening hole is arranged in a tapered hole shape, and the tapered hole has a convergent effect on the head of the bolt, so that the straightening hole can straighten the bolt with a larger inclination angle.

[0031] It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the invention.

[0032] This summary of various implementations or examples of the technology described in this disclosure is not a comprehensive disclosure of the entire scope or all features of the disclosed technology. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] In the drawings, which are not necessarily drawn to scale, the same reference numerals may describe similar parts in different views. The same reference numerals with letter suffixes or different letter suffixes may represent different instances of similar parts. The accompanying drawings generally illustrate various embodiments by way of example and not limitation, and together with the specification and claims, are used to illustrate the embodiments of the invention. When appropriate, the same reference numerals are used throughout the drawings to refer to the same or similar parts. Such embodiments are illustrative and are not intended to be exhaustive or exclusive embodiments of the present apparatus or method.

[0034] Figure 1 A schematic diagram of the three-dimensional structure of a screwing device provided in an embodiment of the present invention.

[0035] Figure 2 A view of a screwing device provided by an embodiment of the present invention in a first working state.

[0036] Figure 3 for Figure 2 An enlarged view of detail E.

[0037] Figure 4 for Figure 2 An enlarged view of detail A.

[0038] Figure 5 A view of a screwing device provided by an embodiment of the present invention in a second working state.

[0039] Figure 6 for Figure 5 An enlarged view of detail B.

[0040] Figure 7 A view showing a screwing device in a third working state provided by an embodiment of the present invention.

[0041] Figure 8 for Figure 7 An enlarged view of a portion C.

[0042] Fig. 9A view showing a screwing device in a fourth working state provided by an embodiment of the present invention.

[0043] Fig.10 for Fig. 9 An enlarged view of a portion D.

[0044] Reference numerals:

[0045] 10-first drive mechanism; 11-vertical guide rail; 12-slider; 20-second drive mechanism; 21-telescopic cylinder; 22-mounting plate; 30-third drive mechanism; 31-fixed plate; 32-worm gear; 33-worm; 34-connecting column; 40-fourth drive mechanism; 41-horizontal guide rail; 42-slider; 50-screwing rod; 51-motor; 60-straightening plate; 61-straightening hole; 62-straightening sleeve; 63-perforation; 70-mounting frame; 71-working platform; 72-movable frame; 100-bolt. DETAILED DESCRIPTION

[0046] In order to make the purpose, technical solution and advantages of the embodiment of the present invention clearer, the technical solution of the embodiment of the present invention will be clearly and completely described below in conjunction with the drawings of the embodiment of the present invention. Obviously, the described embodiment is a part of the embodiment of the present invention, not all of the embodiments. Based on the described embodiment 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.

[0047] Unless otherwise defined, the technical terms or scientific terms used in the present invention should be understood by people with ordinary skills in the field to which the present invention belongs. The words "first", "second" and similar words used in the present invention do not indicate any order, quantity or importance, but are only used to distinguish different components. "Include" or "comprise" and similar words mean that the elements or objects appearing before the word include the elements or objects listed after the word and their equivalents, without excluding other elements or objects. "Connect" or "connected" and similar words are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0048] In order to keep the following description of the embodiments of the present invention clear and concise, detailed descriptions of well-known functions and well-known components are omitted.

[0049] like Figures 1 to 10As shown, an embodiment of the present invention discloses a screwing device, which includes: a mounting frame 70, a screwing body having a screwing rod 50 and a first driving mechanism 10, a straightening plate 60, and a second driving mechanism 20. The mounting frame 70 is used for mounting other components of the screwing device such as the screwing body, and the mounting frame 70 has a working platform 71, on which there is a tool for placing bolts 100, and the bolts 100 are placed on the tool to wait for being penetrated into the workpiece to be assembled, such as the disc body and the hub body of the brake disc. Figure 1 As shown, the screwing body is mounted on the top of the working platform 71 by means of the mounting frame 70, and the screwing rod 50 of the screwing body is driven by the first driving mechanism 10 to move vertically, and then driven by the actuator (such as the motor 51) to provide a torque for screwing the nut on the bolt 100, so as to screw the nut. Figure 4 Combined with Figure 2 As shown, a vertically penetrating straightening hole 61 is formed on the straightening plate 60, and the lower part of the straightening hole 61 forms a tapered hole with a small top and a large bottom; the straightening plate 60 can be driven by the second driving mechanism 20 to move vertically. The function of the straightening plate 60 moving downward under the drive of the second driving mechanism 20 is that before the nut is sleeved on the bolt 100, the straightening plate 60 moves downward so that the head of the bolt 100 passes through the straightening hole 61 and the bolt 100 is straightened by the straightening hole 61.

[0050] The advantages of the screwing device disclosed in the above embodiment are:

[0051] By adding a vertically movable straightening plate 60, the straightening plate 60 can move downward to straighten the bolt 100 that may be in a tilted state with the help of the straightening hole 61, so that the bolt 100 can be corrected to a stricter vertical state, thereby facilitating the insertion of the workpiece to be assembled and facilitating the nut on the bolt 100 to be embedded in the screw rod 50.

[0052] In addition, the lower portion of the straightening hole 61 is configured to be a tapered hole, and the tapered hole has a convergent effect on the head of the bolt 100 , so that the straightening hole 61 can straighten the bolt 100 with a larger inclination angle.

[0053] In a preferred embodiment of the present invention, Figure 4 As shown, a mounting hole is provided on the centralizing plate 60, a bushing 62 is provided in the mounting hole, and the inner hole of the bushing 62 forms the centralizing hole 61. In this embodiment, the centralizing hole 61 is formed by the inner hole of the bushing 62. When the centralizing hole 61 is worn and deformed, the centralizing hole 61 can be made to meet the requirements by replacing a new bushing 62, thereby avoiding the need to replace the centralizing plate 60 as a whole.

[0054] In a preferred embodiment of the present invention, Figure 8 Combined with Figure 7As shown, a vertical through hole 63 is also provided on the straightening plate 60. The function of the through hole 63 is that when the straightening plate 60 completes straightening of the bolt 100 and moves upward, the lower end of the screw rod 50 avoids interference with the straightening plate 60 by passing through the through hole 63.

[0055] In case a circle of bolts 100 are required to penetrate the workpiece, a circle of straightening holes 61 corresponding to the circle of bolts 100 are arranged on the straightening plate 60. In this way, a circle of bolts 100 can be penetrated through the corresponding straightening holes 61 at the same time by moving the straightening plate 60 downward once, thereby straightening all the bolts 100 at the same time.

[0056] Accordingly, in order to improve the tightening efficiency of a circle of bolts 100, a plurality of screwing rods 50 are arranged, and the plurality of screwing rods 50 are set in a manner that they can be aligned with a corresponding number of bolts 100 at the same time. That is, when one screwing rod 50 is aligned with a bolt 100, the other screwing rods 50 are also aligned with the other bolts 100 one by one at the same time. In this way, the first driving mechanism 10 is used to drive the plurality of screwing rods 50 to move downward and the respective motors 51 are used to drive the screwing rods 50, thereby completing the tightening of the nuts on the plurality of bolts 100 at the same time.

[0057] In a preferred embodiment of the present invention, the screwing device further includes a third driving mechanism 30, which is used to adjust the horizontal position of the screwing rod 50 and the straightening hole 61 of the straightening plate 60, specifically the angular position in the circumferential direction. The adjustment sequence is as follows: first, the straightening plate 60 is driven to rotate horizontally by the third driving mechanism 30 (of course, the screwing rod 50 can move synchronously), so that the straightening hole 61 is roughly aligned with the bolt 100, then, the straightening plate 60 is driven to move vertically by the second driving mechanism 20 to straighten the bolt 100, and then, after the bolt 100 is penetrated through the workpiece and the nut is sleeved, the screwing rod 50 is moved circumferentially by the third driving mechanism 30 again, so that the screwing rod 50 is aligned with the bolt 100 and driven downward by the first driving mechanism 10, and then the screwing rod 50 is driven by the motor 51 to screw the nut.

[0058] A preferred embodiment of the present invention provides a first drive mechanism 10, a second drive mechanism 20 and a third drive mechanism 30 of a preferred structure. Specifically, the first drive mechanism 10 includes: a vertical rail, a slider, and an actuator; the second drive mechanism 20 includes a mounting plate 22 and a telescopic cylinder 21; the third drive mechanism 30 includes a fixed plate 31 and a transmission mechanism. The mounting plate 22 is located above the straightening plate 60, the screw rod 50 is installed below the mounting plate 22, the motor 51 is installed on the mounting plate, and the upper end of the screw rod 50 is connected to the motor 51, so that the motor 51 can drive the screw rod 50 to rotate. The telescopic cylinder 21 is fixed below the mounting plate 22, and the piston rod of the telescopic cylinder 21 is connected to the straightening plate 60 to drive the straightening plate 60 to move vertically. The fixed plate 31 is located above the mounting plate 22 and is connected to the mounting plate 22 by a connecting column 34; as shown in FIG. Figure 3 As shown, the transmission mechanism includes a worm wheel 32 mounted on the fixed plate 31 and a worm 33 driving the worm wheel 32 to rotate. The worm 33 drives the worm wheel 32 to rotate, so as to drive the mounting plate 22 and the straightening plate 60 to rotate through the fixed plate 31. The vertical guide rail 11 is mounted on the mounting frame 70, and the slider is fixed on the fixed plate 31, and the slider can slide along the vertical guide rail 11. The actuator, such as a servo motor, drives the slider to slide through a transmission mechanism such as a rack and a gear to drive the fixed plate 31 to move vertically, thereby driving the mounting plate 22 to move vertically, and finally driving the screw rod 50 to move vertically.

[0059] In a preferred embodiment of the present invention, a fourth driving mechanism 40 is added to the screwing device, and the fourth driving mechanism 40 includes a horizontal guide rail 41 and a slider. The horizontal guide rail 41 is arranged above the working platform 71, and the slider is fixed on the movable frame (the vertical guide rail 11 is specifically arranged on the movable frame). The slider slides along the horizontal guide rail 41, and an actuator such as a motor is used to drive the slider through a transmission mechanism such as a gear or a rack, thereby driving the movable frame 72 to drive the screwing rod 50 and the straightening plate 60 to move horizontally.

[0060] The working principle of the screwing device using the above-mentioned driving mechanism is introduced below:

[0061] After the bolt 100 is placed on the tooling of the working platform 71 , the fourth driving mechanism 40 is used to move the screwing body to the top of the tooling.

[0062] The third driving mechanism 30 is used to drive the straightening plate 60 to rotate. Figure 2 and Figure 4 As shown, the centralizing holes 61 on the centralizing plate 60 are aligned one by one with the bolts 100 located therebelow.

[0063] Then, if Figure 5 and Figure 6As shown, the second driving mechanism 20 is used to drive the straightening plate 60 to move downward, so that the bolt 100 passes through the straightening hole 61 , and then the straightening hole 61 straightens the bolt 100 .

[0064] Then, the second driving mechanism 20 is used to drive the straightening plate 60 to move upward to complete the straightening of the bolt 100 .

[0065] When the workpiece is penetrated by the bolt 100 and the head of the bolt 100 is covered with a nut (attached Figure 7 and Figure 8 The workpiece and nut are hidden in the figure). Figure 7 and Figure 8 As shown, the third driving mechanism 30 is used again to drive the mounting plate 22 to rotate (the straightening plate 60 also rotates synchronously) so that the screw rod 50 is aligned with the nut, and then, as shown in FIG. Fig. 9 and Fig.10 As shown, the first driving mechanism 10 is used again to drive the mounting plate 22 to move downward to drive the screwing rod 50 to move downward, and the nut is embedded in the slot at the lower end of the screwing rod 50 .

[0066] Then, the motor 51 is used to drive the screwing rod 50 to implement and complete the tightening of the nut, and then the first driving mechanism 10 is used again to drive the screwing rod 50 to move upward. If there are still nuts that have not been tightened, the third driving mechanism 30 is used to adjust the angle of the screwing rod 50 to align with the nut that has not been tightened, and then the above screwing work is continued to complete the tightening of the nut, and the workpiece is assembled.

[0067] In addition, although exemplary embodiments have been described in the present invention, the scope includes any and all embodiments based on the present invention with equivalent elements, modifications, omissions, combinations (e.g., various embodiments intersecting schemes), adaptations or changes. The elements in the claims will be interpreted broadly based on the language adopted in the claims, and are not limited to the examples described in this specification or during the implementation of this application, and their examples will be interpreted as non-exclusive. Therefore, this specification and examples are intended to be considered as examples only, and the true scope and spirit are indicated by the following claims and the full scope of their equivalents.

[0068] The above description is intended to be illustrative rather than restrictive. For example, the above examples (or one or more of them) can be used in combination with each other. For example, a person of ordinary skill in the art can use other embodiments when reading the above description. In addition, in the above-mentioned specific embodiments, various features can be grouped together to simplify the present invention. This should not be interpreted as an intention that a disclosed feature that is not required to be protected is necessary for any claim. On the contrary, the subject matter of the present invention may be less than all the features of a specific disclosed embodiment. Thus, the following claims are incorporated into the specific embodiments as examples or embodiments, wherein each claim is independently used as a separate embodiment, and it is considered that these embodiments can be combined with each other in various combinations or arrangements. The scope of the present invention should be determined with reference to the attached claims and the full scope of equivalent forms granted by these claims.

[0069] The above embodiments are only exemplary embodiments of the present invention and are not intended to limit the present invention. The protection scope of the present invention is defined by the claims. Those skilled in the art may make various modifications or equivalent substitutions to the present invention within the essence and protection scope of the present invention, and such modifications or equivalent substitutions shall also be deemed to fall within the protection scope of the present invention.

Claims

1. A screwing device, characterized in that: include: A screwing body, comprising a screwing rod for screwing a nut on a bolt and a first driving mechanism for driving the screwing rod to move vertically; A centralizing plate having a centralizing hole formed thereon; The second driving mechanism is used to drive the vertical movement of the centralizing plate; wherein: The lower part of the straightening hole forms a tapered hole which is smaller at the top and larger at the bottom; Before the nut is sleeved on the bolt, the second driving mechanism drives the straightening plate to move downward so that the head of the bolt passes through the straightening hole and the bolt is straightened by the straightening hole; The said straightening plate is also provided with vertical through holes; wherein: The screw rod is opposite to the through hole and can penetrate the through hole; The centralizing plate is provided with a mounting hole, a bushing is arranged in the mounting hole, and the inner hole of the bushing forms the centralizing hole; The centralizing holes include a plurality of holes, and the plurality of centralizing holes and the plurality of bolts are arranged in a circle with the same interval; The screw rods include a plurality of screw rods, and the plurality of screw rods are arranged in a manner that they can align with a corresponding number of bolts at the same time; The screwing device also includes a third driving mechanism; wherein: After the straightening plate moves vertically to straighten the bolt through the straightening hole, the third driving mechanism drives the screwing rod to adjust its position to align with the bolt; The second driving mechanism comprises: A mounting plate, which is located above the straightening plate, and the screw rod is installed below the mounting plate; A telescopic cylinder is fixed below the mounting plate, and a piston rod of the telescopic cylinder is connected to the centralizing plate to drive the centralizing plate to move vertically.

2. The screwing device according to claim 1, characterized in that: A motor is arranged on the mounting plate, and the upper end of the screw rod is connected to the motor to be driven by the motor.

3. The screwing device according to claim 1, characterized in that: The third driving mechanism comprises: A fixing plate, which is located above the mounting plate and connected to the mounting plate via a connecting column; The transmission mechanism comprises a worm wheel mounted on the fixed disk and a worm for driving the worm wheel to rotate.

4. The screwing device according to claim 3, characterized in that: The first driving mechanism comprises: Vertical guide rails; A slider capable of sliding along the vertical guide rail, wherein the fixed plate is fixedly connected to the slider; The actuator is used to drive the slider to slide vertically.

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