Automatic screw turning equipment

Abstract

The utility model belongs to the technical field of automation equipment, and discloses automatic screw turning equipment. The utility model provides automatic screw turning equipment which comprises a positioning mechanism and a tightening mechanism, the positioning mechanism comprises a first driving part and a positioning assembly, the positioning assembly comprises a fixed part and a plurality of movable parts, the first driving part is in transmission connection with the fixed part, and the first driving part drives the movable parts to be close to a workpiece to be connected through the fixed part. Each movable part is provided with a first positioning piece, the structures and / or sizes of the first positioning pieces on the multiple movable parts are different, one of the multiple movable parts is selected to be detachably connected to the fixed part, and the first positioning piece on the movable part connected with the fixed part is used for being matched with a positioning structure on a workpiece to be connected in an inserted mode; the tightening mechanism comprises a second driving part and a tightening assembly, the second driving part is in transmission connection with the tightening assembly so as to drive the tightening assembly to be close to or away from the screw, and the tightening assembly is used for driving the screw to rotate so as to screw the screw on the to-be-connected workpiece.

Description

Technical Field

[0001] The utility model relates to the technical field of automation equipment, in particular to an automatic screw tightening device. Background Art

[0002] In the process of mechanical production, screws are widely used, and the connection between different workpieces can be achieved by tightening the screws. In the prior art, it is usually necessary to use a positioning device to accurately position the workpiece, and then use an automatic screw tightening device to tighten the screws on the workpiece. Different positioning devices need to be replaced according to different workpieces, resulting in high production costs, a large number of equipment, and a large space occupation.

[0003] Therefore, it is urgent to propose an automatic screw tightening device to solve the above problems. Utility Model Content

[0004] The utility model aims to provide an automatic screw-tightening device, which can fix a workpiece and can conveniently and efficiently replace a positioning device adapted to different workpieces.

[0005] To achieve this purpose, the utility model adopts the following technical solutions:

[0006] An automatic screw tightening device, comprising:

[0007] A positioning mechanism, wherein the positioning mechanism comprises a first driving member and a positioning assembly, wherein the positioning assembly comprises a fixed portion and a plurality of movable portions, wherein the first driving member is in driving connection with the fixed portion to drive the fixed portion to approach or move away from the workpiece to be connected, wherein each of the movable portions is provided with a first positioning member, wherein the shapes and / or sizes of the first positioning members on the plurality of movable portions are not all the same, wherein one of the plurality of movable portions is detachably connected to the fixed portion, and wherein the first positioning member on the movable portion connected to the fixed portion is used for plugging and matching with the positioning structure on the workpiece to be connected;

[0008] The tightening mechanism includes a second driving member and a tightening assembly, wherein the second driving member is in transmission connection with the tightening assembly to drive the tightening assembly to approach or move away from the screw on the workpiece to be connected, and the tightening assembly is used to drive the screw to rotate so as to screw it onto the workpiece to be connected.

[0009] Furthermore, avoidance holes are provided on both the fixed part and the movable part, and the tightening assembly includes a tightening drive and a tightening member arranged at the output end of the tightening drive, the tightening drive is arranged at the output end of the second drive, and the tightening member can pass through the avoidance hole, and the tightening drive is used to drive the tightening member to rotate.

[0010] Furthermore, there are multiple first positioning members on each of the movable parts, and the multiple first positioning members are arranged around the avoidance hole.

[0011] Furthermore, a first groove having an inlet and an outlet is formed on the fixed portion, and the movable portion is slidably inserted into the first groove.

[0012] Furthermore, the positioning assembly also includes a fixing piece, which is threadedly connected to the fixing portion and can be tightened against the movable portion.

[0013] Furthermore, the positioning assembly also includes a second positioning member, a positioning hole is provided on the movable portion, and the second positioning member is threadedly connected to the fixed portion and can be plugged into the positioning hole.

[0014] Furthermore, the first positioning member includes a positioning shaft, an elastic member and a pressure head, one end of the positioning shaft is connected to the movable part, and the pressure head is arranged at the other end of the positioning shaft for plugging and cooperating with the positioning structure of the workpiece to be connected, and can move relative to the positioning shaft along the axis of the positioning shaft, and the elastic member is arranged between the positioning shaft and the pressure head.

[0015] Furthermore, the automatic screw-tightening device further comprises a frame, and the positioning mechanism and the tightening mechanism are both arranged on the frame;

[0016] The positioning mechanism also includes a first guide assembly, the first guide assembly includes a first slide rail and a first sliding portion slidably fitted on the first slide rail, the first sliding portion is arranged on the fixed portion, and the first slide rail extends in a vertical direction and is arranged on the frame; and / or the tightening mechanism also includes a second guide assembly, the second guide assembly includes a second slide rail and a second sliding portion slidably fitted on the second slide rail, the second sliding portion is arranged on the tightening assembly, and the second slide rail extends in a vertical direction and is arranged on the frame.

[0017] Furthermore, a limiting member is provided on one of the fixing portion and the tightening assembly, and a limiting hole matching with the limiting member is provided on the other, and the limiting member is passed through the limiting hole to limit the movement range of the tightening assembly in the vertical direction.

[0018] Furthermore, the positioning assembly also includes an anti-foolproof detection component, which is arranged on the fixed part and is used to detect the installation direction of the movable part.

[0019] Beneficial effects of the utility model:

[0020] The utility model provides an automatic screw-tightening device, including a positioning mechanism and a tightening mechanism, the positioning mechanism includes a first driving member and a positioning assembly, the positioning assembly includes a fixed part and a plurality of movable parts, the first driving member is transmission-connected to the fixed part, the first driving member drives the movable part to approach a workpiece to be connected through the fixed part, each movable part is provided with a first positioning member, the shapes and / or sizes of the first positioning members on the plurality of movable parts are not all the same, one of the plurality of movable parts is selectively detachably connected to the fixed part, the first positioning member on the movable part connected to the fixed part is used to be plugged and matched with the positioning structure on the workpiece to be connected, so as to fix the position of the workpiece to be connected, according to the workpiece to be connected with different positioning structures, the operator can conveniently and efficiently replace the movable part with different first positioning members and connect it to the fixed part, thereby improving the versatility of the positioning mechanism; the tightening mechanism includes a second driving member and a tightening assembly, the second driving member is transmission-connected to the tightening assembly to drive the tightening assembly to approach or move away from the screw on the workpiece to be connected, the tightening assembly is used to drive the screw to rotate, so as to screw it on the workpiece to be connected, thereby realizing the connection of the workpiece to be connected. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a structural schematic diagram of the automatic screw tightening device provided by the utility model;

[0022] Figure 2 It is a partial schematic diagram of the automatic screw tightening device of the utility model;

[0023] Figure 3 It is a structural schematic diagram of the movable part and the first positioning member of the utility model.

[0024] In the figure:

[0025] 100, rack;

[0026] 1. Positioning mechanism; 11. First driving member; 12. Positioning assembly; 121. Fixed portion; 1211. First groove; 122. Moving portion; 1221. Second groove; 123. First positioning member; 1231. Positioning shaft; 1232. Elastic member; 1233. Press head; 124. Second positioning member; 125. Fixed member; 126. Foolproofing detection member; 13. First guide assembly; 131. First slide rail; 132. First sliding portion;

[0027] 2. Tightening mechanism; 21. Second driving member; 22. Tightening assembly; 221. Tightening driving member; 222. Tightening member; 23. Second guide assembly; 231. Second slide rail; 232. Second sliding part; 24. Limiting member. DETAILED DESCRIPTION

[0028] The present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It should also be noted that, for ease of description, only the parts related to the present invention, rather than all structures, are shown in the accompanying drawings.

[0029] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" 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 an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0030] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0031] In the description of this embodiment, the terms "upper", "lower", "right", etc., are based on the directions or positions shown in the drawings, and are only for the convenience of description and simplified operation, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation of the present invention. In addition, the terms "first" and "second" are only used to distinguish in the description and have no special meaning.

[0032] like Figure 1-2As shown, this embodiment provides an automatic screw tightening device, including a positioning mechanism 1 and a tightening mechanism 2, the positioning mechanism 1 includes a first driving member 11 and a positioning assembly 12, the positioning assembly 12 includes a fixed portion 121 and a plurality of movable portions 122, the first driving member 11 is transmission-connected to the fixed portion 121, the first driving member 11 drives the movable portion 122 to approach the workpiece to be connected through the fixed portion 121, each movable portion 122 is provided with a first positioning member 123, the shapes and / or sizes of the first positioning members 123 on the plurality of movable portions 122 are not all the same, one of the plurality of movable portions 122 is detachably connected to the fixed portion 121, and the movable portion 122 connected to the fixed portion 121 is provided with a first positioning member 123. The first positioning member 123 is used to plug and cooperate with the positioning structure on the workpiece to be connected, so as to accurately locate and fix the position of the workpiece to be connected. According to the workpiece to be connected with different positioning structures, the operator can easily and efficiently replace the movable part 122 with different first positioning members 123 and connect it with the fixed part 121, thereby improving the versatility of the positioning mechanism 1; the tightening mechanism 2 includes a second driving member 21 and a tightening assembly 22, and the second driving member 21 and the tightening assembly 22 are transmission-connected to drive the tightening assembly 22 to approach or move away from the screw on the workpiece to be connected, and the tightening assembly 22 is used to drive the screw to rotate so as to screw it onto the workpiece to be connected, thereby realizing the connection of the workpieces to be connected.

[0033] Among them, the positioning structure on the workpiece to be connected includes but is not limited to a positioning hole or a positioning protrusion, and the structural adaptability of the first positioning member 123 is set to a positioning pin or a positioning sleeve that can be plugged and matched therewith, which belongs to the adaptability setting that can be made by the staff in this field and is not specifically limited here. In addition, the shape of the first positioning member 123 can also be adjusted according to the shape of the positioning structure on the workpiece to be connected. For example, when the positioning structure on the workpiece to be connected is a circular positioning hole, the first positioning member 123 is a circular positioning pin; when the positioning structure on the workpiece to be connected is a square positioning hole, the first positioning member 123 is a square positioning pin; when the positioning structure on the workpiece to be connected is a positioning protrusion with a polygonal cross-sectional shape, the first positioning member 123 is a positioning sleeve with a polygonal cross-sectional shape and adapted to the positioning protrusion.

[0034] It should be noted that when the first positioning member 123 is a positioning pin, the size of the first positioning member 123 includes height and cross-sectional area, etc., and when the positioning pin is a positioning sleeve, the size of the first positioning member 123 includes height, cross-sectional area and aperture, etc., and the above parameters can be adaptively adjusted according to the positioning structure on the workpiece to be connected. In addition, the number of first positioning members 123 on each movable portion 122 can also be adaptively adjusted according to the positioning structure on the workpiece to be connected, which will not be elaborated here.

[0035] Furthermore, the fixed part 121 and the movable part 122 are both provided with avoidance holes, and the tightening assembly 22 includes a tightening drive 221 and a tightening member 222 arranged at the output end of the tightening drive 221, the tightening drive 221 is arranged at the output end of the second drive 21, and the tightening member 222 can pass through the avoidance hole, and the tightening drive 221 is used to drive the tightening member 222 to rotate, thereby driving the screw to rotate to connect the workpiece to be connected. When the operator needs to replace the movable part 122, first start the second drive 21 to drive the tightening drive 221 to move upward, thereby driving the tightening member 222 to move upward out of the avoidance hole, and then remove the movable part 122, and install another movable part 122 on the fixed part 121, and then start the second drive 21 to drive the tightening member 222 to pass through the avoidance hole downward, and the automatic screw tightening device can work normally, avoiding the tightening member 222 from being bumped when the movable part 122 is disassembled.

[0036] It should be noted that the present embodiment does not limit the specific structure of the tightening member 222 , and any structure in the prior art that can cooperate with the screw to be connected to achieve connection between the workpiece to be connected and the screw is within the protection scope of the present embodiment.

[0037] In order to balance the force on the workpieces, there are multiple first positioning members 123 on each movable part 122. The multiple first positioning members 123 are arranged around the avoidance hole, that is, around the tightening member 222, which can more stably fix the workpieces to be connected and prevent the workpieces to be connected from rotating or deforming due to the tightening force when the tightening member 222 tightens the screw. The arrangement of the multiple first positioning members 123 is adapted to the positioning structure on the workpieces to be connected.

[0038] like Figure 2 As shown, a first groove 1211 with an inlet and outlet is provided on the fixed portion 121, and the movable portion 122 is slidably inserted into the first groove 1211. The operator can quickly insert the movable portion 122 into the first groove 1211 through the inlet and outlet, or take the movable portion 122 out of the first groove 1211 through the inlet and outlet, which facilitates the disassembly or installation of the movable portion 122, simplifies the operation steps, and is conducive to improving production efficiency.

[0039] In order to connect the movable part 122 with the fixed part 121, the positioning assembly 12 also includes a second positioning member 124. The movable part 122 is provided with a positioning hole. The second positioning member 124 is threadedly connected to the fixed part 121 and can be plugged into the positioning hole. After the operator inserts the movable part 122 into the first groove 1211, the positioning hole on the movable part 122 is aligned with the first threaded hole on the fixed part 121, and then the second positioning member 124 is screwed into the first threaded hole until one end of the second positioning member 124 is plugged into the positioning hole, thereby fixing the position of the movable part 122 in the horizontal direction.

[0040] Furthermore, the positioning assembly 12 also includes a fixing member 125, which is threadedly connected to the fixed portion 121. After the operator inserts the movable portion 122 into the first groove 1211 and determines the horizontal position, the fixing member 125 is screwed into the second threaded hole on the fixed portion 121 until one end of the fixing member 125 abuts against the movable portion 122 and tightens the movable portion 122 into the first groove 1211, thereby fixing the position of the movable portion 122 in the vertical direction.

[0041] The heights of the positioning structures on the workpieces to be connected may be different, resulting in the need for the multiple first positioning members 123 to reach different heights to be plugged and matched with the positioning structures. Figure 3 As shown, the first positioning member 123 includes a positioning shaft 1231, an elastic member 1232 and a pressing head 1233. One end of the positioning shaft 1231 is connected to the movable part 122, and the pressing head 1233 is arranged at the other end of the positioning shaft 1231, and is used to be plugged into and matched with the positioning structure of the workpiece to be connected, and can move along the axis of the positioning shaft 1231 relative to the positioning shaft 1231. The elastic member 1232 is arranged between the positioning shaft 1231 and the pressing head 1233, and the elastic member 1232 provides abutment force for the pressing head 1233, so that the pressing head 1233 can be plugged into and matched with positioning structures of different heights and abut against the surface of the workpiece to be connected, thereby further improving the versatility of the positioning structure. In this embodiment, the elastic member 1232 is a spring sleeved on the positioning shaft 1231, one end of the pressure head 1233 is slidably sleeved on the positioning shaft 1231, the spring is sleeved on the positioning shaft 1231, and one end of the spring abuts or is connected to the positioning shaft 1231, and the other end of the spring abuts or is connected to the pressure head 1233. In other embodiments, the connection relationship between the positioning shaft 1231 and the pressure head 1233 includes but is not limited to one end of the pressure head 1233 being embedded in the positioning shaft 1231, one end of the elastic member 1232 abuts or is connected to the positioning shaft 1231, and the other end abuts or is connected to the pressure head 1233, which is not limited here.

[0042] like Figure 1As shown, the automatic screw-tightening device also includes a frame 100, and the positioning mechanism 1 and the tightening mechanism 2 are both arranged on the frame 100, so that the automatic screw-tightening device has a compact structure and is easy to carry as a whole. The positioning mechanism 1 also includes a first guide assembly 13, the first guide assembly 13 includes a first slide rail 131 and a first sliding portion 132 slidably matched on the first slide rail 131, the first sliding portion 132 is arranged on the fixing portion 121, the first slide rail 131 extends in the vertical direction and is arranged on the frame 100, and the first driving member 11 can drive the first sliding portion 132 to move in the vertical direction, thereby driving the positioning assembly 12 to move up and down to approach or move away from the workpiece to be connected. Furthermore, the tightening mechanism 2 also includes a second guide assembly 23, which includes a second slide rail 231 and a second sliding portion 232 slidably fitted on the second slide rail 231. The second sliding portion 232 is arranged on the tightening assembly 22, and the second slide rail 231 extends in a vertical direction and is arranged on the first sliding portion 132, so that the second driving member 21 can drive the tightening assembly 22 to move up and down to approach or move away from the screws on the workpiece to be connected.

[0043] Furthermore, a limiting member 24 is provided on one of the fixing portion 121 and the tightening assembly 22, and a limiting hole matching the limiting member 24 is provided on the other. The limiting member 24 is passed through the limiting hole to limit the moving range of the tightening assembly 22 in the vertical direction. By adjusting the height of the limiting member 24, the descending height of the second sliding portion 232 can be limited, thereby facilitating the limitation of the working position of the tightening member 222 and preventing the tightening member 222 from descending too much and causing the screw to damage the connected part.

[0044] In some embodiments, the positioning assembly 12 also includes an anti-foolproof detection component 126, which is arranged on the fixed part 121. A second groove 1221 is arranged on one side of the movable part 122. The anti-foolproof detection component 126 is used to detect the second groove 1221, so as to detect whether the installation direction of the movable part 122 is correct, so as to avoid the first positioning component 123 from crushing the workpiece due to installation errors.

[0045] Furthermore, the positioning assembly 12 also includes an alarm that is in communication with the foolproof detection member 126. If the foolproof detection member 126 does not detect the second groove 1221, it is considered that the movable part 122 is installed in the wrong direction, and the alarm will sound an alarm to prompt the operator to check.

[0046] Obviously, the above embodiments of the present invention are merely examples for the purpose of clearly illustrating the present invention, and are not intended to limit the implementation methods of the present invention. For those skilled in the art, various obvious changes, readjustments and substitutions can be made without departing from the scope of protection of the present invention. It is not necessary and impossible to list all implementation methods here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention shall be included in the scope of protection of the claims of the present invention.

Claims

1. An automatic screw tightening device, characterized in that: include: A positioning mechanism (1), the positioning mechanism (1) comprising a first driving member (11) and a positioning assembly (12), the positioning assembly (12) comprising a fixed portion (121) and a plurality of movable portions (122), the first driving member (11) being drivingly connected to the fixed portion (121) so as to drive the fixed portion (121) to approach or move away from a workpiece to be connected, each of the movable portions (122) being provided with a first positioning member (123), the shapes and / or sizes of the first positioning members (123) on the plurality of movable portions (122) being different, one of the plurality of movable portions (122) being detachably connected to the fixed portion (121), the first positioning member (123) on the movable portion (122) being connected to the fixed portion (121) being used for plugging and matching with a positioning structure on the workpiece to be connected; A tightening mechanism (2), the tightening mechanism (2) comprising a second driving member (21) and a tightening assembly (22), the second driving member (21) being in driving connection with the tightening assembly (22) so as to drive the tightening assembly (22) to move closer to or away from a screw on the workpiece to be connected, the tightening assembly (22) being used to drive the screw to rotate so as to screw it onto the workpiece to be connected.

2. The automatic screw tightening device according to claim 1, characterized in that: The fixed part (121) and the movable part (122) are both provided with avoidance holes. The tightening assembly (22) comprises a tightening driving member (221) and a tightening member (222) arranged at an output end of the tightening driving member (221). The tightening driving member (221) is arranged at the output end of the second driving member (21), and the tightening member (222) can pass through the avoidance hole. The tightening driving member (221) is used to drive the tightening member (222) to rotate.

3. The automatic screw tightening device according to claim 2, characterized in that: There are multiple first positioning members (123) on each movable portion (122), and the multiple first positioning members (123) are arranged around the avoidance hole.

4. The automatic screw tightening device according to claim 1, characterized in that: The fixed portion (121) is provided with a first groove (1211) having an inlet and an outlet, and the movable portion (122) is slidably inserted into the first groove (1211).

5. The automatic screw tightening device according to claim 4, characterized in that: The positioning assembly (12) further comprises a fixing member (125), wherein the fixing member (125) is threadedly connected to the fixing portion (121) and can be pressed against the movable portion (122).

6. The automatic screw tightening device according to claim 1, characterized in that: The positioning assembly (12) further comprises a second positioning member (124), a positioning hole is provided on the movable portion (122), and the second positioning member (124) is threadedly connected to the fixed portion (121) and can be plugged into the positioning hole.

7. The automatic screw-tightening device according to claim 1, characterized in that: The first positioning member (123) comprises a positioning shaft (1231), an elastic member (1232) and a pressing head (1233); one end of the positioning shaft (1231) is connected to the movable portion (122); the pressing head (1233) is arranged at the other end of the positioning shaft (1231) for plugging and cooperating with the positioning structure of the workpiece to be connected, and can move relative to the positioning shaft (1231) along the axis of the positioning shaft (1231); the elastic member (1232) is arranged between the positioning shaft (1231) and the pressing head (1233).

8. The automatic screw-tightening device according to any one of claims 1 to 7, characterized in that: The automatic screw-tightening device further comprises a frame (100), and the positioning mechanism (1) and the tightening mechanism (2) are both arranged on the frame (100); The positioning mechanism (1) further comprises a first guide assembly (13), the first guide assembly (13) comprising a first slide rail (131) and a first sliding portion (132) slidably engaged with the first slide rail (131), the first sliding portion (132) being arranged on the fixing portion (121), the first slide rail (131) extending in a vertical direction and being arranged on the frame (100); and / or the tightening mechanism (2) further comprises a second guide assembly (23), the second guide assembly (23) comprising a second slide rail (231) and a second sliding portion (232) slidably engaged with the second slide rail (231), the second sliding portion (232) being arranged on the tightening assembly (22), the second slide rail (231) extending in a vertical direction and being arranged on the frame (100).

9. The automatic screw-tightening device according to any one of claims 1 to 7, characterized in that: A limiting member (24) is provided on one of the fixing portion (121) and the tightening assembly (22), and a limiting hole matching the limiting member (24) is provided on the other, and the limiting member (24) is inserted into the limiting hole to limit the movement range of the tightening assembly (22) in the vertical direction.

10. The automatic screw-tightening device according to any one of claims 1 to 7, characterized in that: The positioning assembly (12) further comprises an anti-foolproof detection component (126), wherein the anti-foolproof detection component (126) is arranged on the fixed part (121), and the anti-foolproof detection component (126) is used to detect the installation direction of the movable part (122).

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