Screw locking device and equipment

Abstract

The present invention relates to the technical field of mechanical workpieces, and discloses a screw locking device and equipment, which includes a positioning device and an electric screwdriver head; the positioning device includes a clamping assembly, a fixed sleeve, a piston cylinder, a cylinder, a piston body and a spring; the fixed sleeve, the piston cylinder, the cylinder and the piston are all hollow structures and are interconnected to form a cavity; the side wall of the cylinder is provided with a vacuum pump interface connected to the cavity; the second mating end of the piston body is mated and connected with the clamping assembly, and the piston body can move in a first direction relative to the clamping assembly to realize the opening and closing of the clamping assembly; this setting method can handle the locking of screws with washers while ensuring production requirements and reducing labor intensity, thereby increasing the use scenarios of the screw locking device and improving assembly efficiency.

Description

Technical Field

[0001] The present invention relates to the technical field of mechanical workpieces, and in particular to a screw locking device and equipment. Background Art

[0002] Screw locking is an indispensable assembly process for most assembled products. Traditional screw locking methods use tools such as handheld electric screwdrivers or screwdrivers to tighten the screws. Faced with the demand for automated production and assembly of large-scale products, the labor intensity is high and production efficiency is low. The tightening force of the screws may be too large or too small, and even the tightening accuracy of the screws cannot be guaranteed. The screw locking machine is an automated assembly equipment that can effectively solve the production and assembly problems caused by manual methods.

[0003] However, the existing screw locking machine has a relatively simple usage scenario and cannot handle the situation of locking screws with washers.

[0004] Therefore, how to design a screw locking device that can handle the locking of screws with washers while ensuring production efficiency and reducing labor intensity, so as to meet assembly requirements, has become a technical problem that needs to be solved urgently in this field. Summary of the Invention

[0005] The purpose of the present invention is to provide a screw locking device and equipment that can handle the locking of screws with washers while ensuring production requirements and reducing labor intensity, thereby increasing the use scenarios of the screw locking device and improving assembly efficiency.

[0006] In order to achieve the above object, the present invention provides the following technical solutions:

[0007] A screw locking device comprises: a positioning device and an electric screwdriver bit extending along a first direction; wherein the positioning device comprises a clamping assembly, a fixed sleeve, a piston cylinder, a cylinder, a piston body and a spring extending along the first direction; the piston cylinder is sleeved on the outer wall of the cylinder, and the fixed sleeve is sleeved on the outer wall of the piston cylinder, the fixed sleeve, the piston cylinder, the cylinder and the piston are all hollow structures and are interconnected to form a cavity for inserting the electric screwdriver bit; the side wall of the cylinder is provided with a vacuum pump interface connected to the cavity; the piston body and the spring are both installed in the inner cavity of the piston cylinder; the first end of the spring contacts the end face of the cylinder, and the second end of the spring contacts the first mating end of the piston body, and the spring can be extended and retracted along the first direction; the clamping assembly is installed at the opening at the end of the cavity, and the clamping assembly is used to clamp and loosen the screw with a washer; the second mating end of the piston body is mated and connected to the clamping assembly, and the piston body can move relative to the clamping assembly along the first direction to realize the opening and closing of the clamping assembly.

[0008] When it is necessary to tighten the screw, this screw locking device first connects the vacuum pump to the vacuum pump interface on the side wall of the cylinder, and then the operator holds the screw locking device with the clamping assembly to clamp the screw and the washer to position the screw with the washer; then the vacuum pump is started to extract the air in the cavity for inserting the electric screwdriver bit, thereby forming a vacuum state in the cavity. The pressure difference between the inside and outside of the cavity causes the spring to be compressed toward the end close to the cylinder, which can facilitate the alignment of the screw and the electric screwdriver bit; after alignment, the clamping assembly is opened, the screw is loosened, and then the screw is tightened.

[0009] When the screw is locked and the electric screwdriver head needs to be separated from the screw, turn off the vacuum pump to allow air to enter the cavity, thereby balancing the pressure inside and outside the cavity. At this time, the spring is extended toward the end away from the cylinder, and the piston body moves in a direction relatively away from the electric screwdriver head, thereby achieving the separation of the electric screwdriver head from the screw.

[0010] This setting method can handle the locking of screws with washers while ensuring production requirements and reducing labor intensity, thereby increasing the use scenarios of the screw locking device and improving assembly efficiency.

[0011] Optionally, a washer slot is provided on the inner wall of the clamping assembly; the washer slot is used to engage with the washer of the screw to achieve precise positioning of the screw with the washer.

[0012] Optionally, the gasket slot includes a first annular slot and a second annular slot; the first annular slot is used for fitting and snapping the elastic gasket, and the second annular slot is used for fitting and snapping the flat gasket.

[0013] Optionally, the clamping assembly includes three sleeve petal bodies and an O-ring; the O-ring is sleeved on the outer walls of the three sleeve petal bodies to form a three-claw sleeve petal assembly in which the three sleeve petal bodies can be relatively closed and opened; the inner wall of the piston cylinder has a wedge-shaped guide surface, and the second mating end of the piston body is provided with a raised positioning portion; in each sleeve petal body: the outer wall of the sleeve petal body has a first wedge-shaped surface for mating with the wedge-shaped guide surface; the inner wall of the sleeve petal body has a second wedge-shaped surface and a first recessed positioning portion, and an angle is formed between the second wedge surface and the outer wall of the piston body; when the screw locking device is in the first state, the raised positioning portion is embedded in the first recessed positioning portion, and the three-claw sleeve petal assembly is in a closed state;

[0014] When the screw locking device is in the second state, the raised positioning portion moves out of the first recessed positioning portion, and the three-claw sleeve petal assembly is in an open state.

[0015] Optionally, in each sleeve petal body: the outer wall of the sleeve petal body has a second recessed positioning portion, and the O-ring is installed in the second recessed positioning portion.

[0016] Optionally, the O-ring is made of elastic material.

[0017] Optionally, in each sleeve petal body: the sleeve petal body has a third wedge surface and a fourth wedge surface; when the screw is aligned with the electric screwdriver head, the screw can move along the fourth wedge surface toward the direction close to the electric screwdriver head; when the screw is disengaged from the electric screwdriver head, the screw can move along the third wedge surface toward the direction close to the electric screwdriver head.

[0018] Optionally, the inner wall of the fixed sleeve has a first annular stepped inner stop to form a first inner mounting surface for fixed connection to the outer wall of the piston cylinder; the outer wall of the piston cylinder has a first annular stepped outer stop to form a first outer mounting surface for fixed connection to the inner wall of the fixed sleeve.

[0019] Optionally, the inner wall of the piston cylinder has a second annular inner stop to form a second inner mounting surface for fixed connection to the outer wall of the cylinder; the outer wall of the cylinder has a second annular outer stop to form a second inner mounting surface for fixed connection to the outer wall of the piston cylinder.

[0020] A screw locking device comprises a vacuum pump component and any one of the above-mentioned screw locking devices. The vacuum pump component is connected to a vacuum pump interface and is used for extracting air from a cavity. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The drawings and the accompanying drawings, which constitute part of this application, are intended to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are intended to explain the present invention and do not constitute an undue limitation of the present invention. Among them:

[0022] Figure 1 A cross-sectional view of the screw locking device and the screw provided in an embodiment of the present invention;

[0023] Figure 2 A schematic structural diagram of a piston body in a screw locking device provided in an embodiment of the present invention;

[0024] Figure 3 A cross-sectional view of a clamping assembly in a screw locking device provided in an embodiment of the present invention.

[0025] Icons: 1-fixed sleeve; 2-piston cylinder; 201-wedge-shaped guide surface; 3-cylinder; 301-vacuum valve interface; 4-electric screwdriver bit; 5-spring; 6-piston body; 601-first mating end; 602-second mating end; 611-raised positioning portion; 7-O-ring 7; 8-clamping assembly; 81-sleeve petal body; 8101-first wedge-shaped surface; 8102-second wedge-shaped surface; 8103-third wedge-shaped surface; 8104-fourth wedge-shaped surface; 8111-first recessed positioning portion; 8112-second recessed positioning portion; 8121-first annular groove; 8122-second annular groove; 9-screw; 10-elastic washer; 11-flat washer. DETAILED DESCRIPTION

[0026] The present invention will be described in detail below with reference to the accompanying drawings and in conjunction with the embodiments. Each example is provided by way of explanation of the present invention and is not intended to limit the present invention. Indeed, it will be apparent to those skilled in the art that modifications and variations may be made in the present invention without departing from the scope or spirit of the present invention. For example, a feature shown or described as part of one embodiment may be used in another embodiment to produce yet another embodiment. Therefore, it is intended that the present invention encompasses such modifications and variations as come within the scope of the appended claims and their equivalents.

[0027] In the description of the present invention, the terms "longitudinal", "transverse", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the present invention and do not require that the present invention must be constructed and operated in a specific orientation. Therefore, they should not be understood as limitations on the present invention. The terms "connected", "connected", and "set" used in the present invention should be understood in a broad sense. For example, they can be fixed connections or detachable connections; they can be directly connected or indirectly connected through intermediate components. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0028] Figure 1 A cross-sectional view of the screw locking device and the screw provided in an embodiment of the present invention; Figure 2 A schematic structural diagram of a piston body in a screw locking device provided in an embodiment of the present invention; Figure 3 A cross-sectional view of a clamping assembly in a screw locking device according to an embodiment of the present invention; Figure 1-Figure 3As shown, an embodiment of the present invention provides a screw locking device, comprising: a positioning device and an electric screwdriver bit 4 extending along a first direction; wherein the positioning device comprises a clamping assembly 8, and a fixed sleeve 1 extending along the first direction, a piston cylinder 2, an air cylinder 3, a piston body 6 and a spring 5; the piston cylinder 2 is sleeved on the outer wall of the air cylinder 3, and the fixed sleeve 1 is sleeved on the outer wall of the piston cylinder 2; the fixed sleeve 1, the piston cylinder 2, the cylinder 3 and the piston are all hollow structures and are interconnected to form a cavity for inserting the electric screwdriver bit 4; the side wall of the air cylinder 3 is provided with a Vacuum pump interface 301; the clamping assembly 8 is installed at the opening at the end of the cavity, and the clamping assembly 8 is used to clamp and loosen the screw 9 with a washer; the piston body 6 and the spring 5 are both installed in the inner cavity of the piston cylinder 2; the first end of the spring 5 contacts the end face of the cylinder 3, and the second end of the spring 5 contacts the first mating end 601 of the piston body 6, and the spring 5 can be extended and retracted along the first direction; the second mating end 602 of the piston body 6 is connected to the clamping assembly 8, and can drive the clamping assembly 8 to move along the first direction to realize the alignment and disengagement of the electric screwdriver head 4 and the screw 9.

[0029] In this embodiment, when it is necessary to tighten the screw 9, this screw locking device first connects the vacuum pump to the vacuum pump interface 301 on the side wall of the cylinder 3, and then the operator holds the screw locking device to clamp the screw 9 and the washer with the clamping assembly 8 to achieve the positioning of the screw 9 with the washer; then the vacuum pump is started to extract the air in the cavity for inserting the electric screwdriver bit 4, thereby forming a vacuum state in the cavity, and the pressure difference between the inside and outside of the cavity causes the spring 5 to be compressed toward the end close to the cylinder 3, which can facilitate the alignment of the screw 9 and the electric screwdriver bit 4; after alignment, the clamping assembly 8 is opened, the screw 9 is loosened, and then the screw 9 is screwed and locked.

[0030] When the screw is locked and the electric screwdriver head 4 needs to be separated from the screw 9, the vacuum pump is turned off to allow air to enter the cavity, thereby balancing the pressure inside and outside the cavity. At this time, the spring 5 is extended toward the end away from the cylinder 3, and the piston body 6 moves in a direction relatively away from the electric screwdriver head 4, thereby achieving the separation of the electric screwdriver head 4 from the screw 9.

[0031] This arrangement can handle the locking of the screws 9 with washers while ensuring production requirements and reducing labor intensity, thereby increasing the use scenarios of the screw locking device and improving assembly efficiency.

[0032] As an optional embodiment, the inner wall of the clamping assembly 8 is provided with a washer slot; the washer slot is used to engage with the washer of the screw 9 to achieve precise positioning of the screw 9 with the washer.

[0033] Specifically, refer to Figure 3The washer slot includes a first annular slot 8121 and a second annular slot 8122 ; the first annular slot 8121 is used for cooperating with the elastic washer 10 , and the second annular slot 8122 is used for cooperating with the flat washer 11 .

[0034] In this embodiment, the setting of the first annular groove 8121 and the second annular groove 8122 can facilitate the clamping of the elastic washer 10 and the flat washer 11, and is suitable for screws 9 with different types of washers. While ensuring assembly efficiency, it can further increase the usage scenarios, and the clamping method of the annular groove and the washer is reliable and temperature-resistant, which can ensure positioning accuracy.

[0035] refer to Figure 2 and Figure 3 As an optional embodiment, the clamping assembly 8 includes three sleeve petal bodies 81 and an O-ring 7; the O-ring 7 is sleeved on the outer walls of the three sleeve petal bodies 81 to form a three-claw sleeve petal assembly in which the three sleeve petal bodies 81 can be relatively closed and opened; the inner wall of the piston cylinder 2 has a wedge-shaped guide surface 201, and the second mating end 602 of the piston body 6 is provided with a raised positioning portion 611; in each sleeve petal body 81: the outer wall of the sleeve petal body 81 has a wedge-shaped guide surface 201 for mating with the wedge-shaped guide surface 201 The first wedge-shaped surface 8101 of the sleeve petal body 81 is provided; the inner wall of the sleeve petal body 81 has a second wedge-shaped surface 8102 and a first recessed positioning portion 8111. The second wedge-shaped surface 8102 forms an angle with the outer wall of the piston body 6. When the screw locking device is in the first state, the raised positioning portion 611 is embedded in the first recessed positioning portion 8111, and the three-claw sleeve petal assembly is in the closed state; when the screw locking device is in the second state, the raised positioning portion 611 moves out of the first recessed positioning portion 8111, and the three-claw sleeve petal assembly is in the open state. In each sleeve petal body 81: the outer wall of the sleeve petal body 81 has a second recessed positioning portion 8112, and the O-ring 7 is installed in the second recessed positioning portion 8112. In each sleeve petal body 81: the sleeve petal body 81 has a third wedge surface 8103 and a fourth wedge surface 8104; when the screw 9 is aligned with the electric screwdriver head 4, the screw 9 can move along the fourth wedge surface 8104 toward the electric screwdriver head 4; when the screw 9 is disengaged from the electric screwdriver head 4, the screw 9 can move along the third wedge surface 8103 toward the electric screwdriver head 4.

[0036] Specifically, in this embodiment, before the three-claw sleeve petal assembly picks up the screw 9, the screw locking device is in the first state; when the three-claw sleeve petal assembly picks up the screw 9, as mentioned above, the pressure difference between the inside and outside of the cavity causes the spring 5 to be compressed toward the end close to the cylinder 3, thereby driving the piston body 6 to move toward the end close to the cylinder 3. At this time, the screw locking device is in the second state, the raised positioning portion 611 moves out of the first recessed positioning portion 8111 to push open the three-claw sleeve petal assembly, and the three-claw sleeve petal assembly is in the open state, and then the screw 9 is aligned with the electric screwdriver bit 4 along the fourth wedge surface 8104;

[0037] Similarly, when the three-claw sleeve petal assembly tightens the screw 9, the spring 5 releases pressure, pushing the piston body 6 to move in the direction close to the screw 9, and the screw locking device returns to the first state, realizing the closure of the three-claw sleeve petal assembly. Under the action of the pressure released by the compression spring 5, the screw 9 disengages from the electric screwdriver head 4 along the third wedge surface 8103.

[0038] As an optional embodiment, the O-ring 7 is made of elastic material.

[0039] In this embodiment, the O-ring 7 made of elastic material not only plays a role in positioning the three sleeve petal bodies 81, but also plays a role in limiting and assisting in the opening and closing process of the three-claw sleeve petal assembly, thereby improving work efficiency and accuracy.

[0040] As an optional embodiment, the inner wall of the fixed sleeve 1 has a first annular stepped inner stop to form a first inner mounting surface for fixed connection to the outer wall of the piston cylinder 2; the outer wall of the piston cylinder 2 has a first annular stepped outer stop to form a first outer mounting surface for fixed connection to the inner wall of the fixed sleeve 1.

[0041] The inner wall of the piston cylinder 2 has a second annular inner stop to form a second inner mounting surface for fixed connection with the outer wall of the cylinder 3; the outer wall of the cylinder 3 has a second annular outer stop to form a second inner mounting surface for fixed connection with the outer wall of the piston cylinder 2.

[0042] In this embodiment, the design of the annular stepped inner stop and the annular stepped outer stop can further ensure the connection stability between the fixed sleeve 1 and the piston cylinder 2, and between the piston cylinder 2 and the cylinder 3, thereby improving the overall reliability of the screw locking device.

[0043] An embodiment of the present invention further provides a screw locking device, comprising a vacuum pump assembly and any of the above-mentioned screw locking devices. The vacuum pump assembly is connected to the vacuum pump interface 301 for extracting air from the cavity.

[0044] In this embodiment, the vacuum pump assembly may include a vacuum pump body and a vacuum valve. The vacuum pump interface 301 can be connected to the vacuum pump and the vacuum valve through a pipeline, and the air in the cavity can be extracted by opening the vacuum valve. In addition, a controller can also be provided to realize remote control of the vacuum pump. The vacuum pump assembly can be set according to actual conditions as long as it can extract the air in the cavity, without specific limitation.

[0045] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Those skilled in the art will readily appreciate that various modifications and variations of the present invention are possible. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A screw locking device, characterized in that: include: A positioning device and an electric screwdriver head extending along a first direction; wherein, The positioning device includes a clamping assembly, a fixing sleeve extending along a first direction, a piston cylinder, an air cylinder, a piston body, and a spring; The piston cylinder is sleeved on the outer wall of the air cylinder, and the fixed sleeve is sleeved on the outer wall of the piston cylinder. The fixed sleeve, piston cylinder, air cylinder and piston are all hollow structures and are interconnected to form a cavity for inserting the electric screwdriver bit; The side wall of the cylinder is provided with a vacuum pump interface communicating with the cavity; The piston body and the spring are both installed in the inner cavity of the piston cylinder; the first end of the spring contacts the end surface of the cylinder, the second end of the spring contacts the first mating end of the piston body, and the spring can be extended and retracted along the first direction; The clamping assembly is installed at the opening at the end of the cavity, and is used to clamp and loosen the screw with a washer; the second mating end of the piston body is matingly connected to the clamping assembly, and the piston body can move relative to the clamping assembly along the first direction to achieve opening and closing of the clamping assembly; The clamping assembly includes three sleeve petal bodies and an O-ring; The O-ring is sleeved on the outer walls of the three sleeve petal bodies to form a three-claw sleeve petal assembly in which the three sleeve petal bodies can be relatively closed and opened; The inner wall of the piston cylinder has a wedge-shaped guide surface, and the second matching end of the piston body is provided with a raised positioning portion; In each sleeve petal body: the outer wall of the sleeve petal body has a first wedge-shaped surface for mating with the wedge-shaped guide surface; the inner wall of the sleeve petal body has a second wedge-shaped surface and a first concave positioning portion, and the second wedge surface forms an angle with the outer wall of the piston body; When the screw locking device is in the first state, the raised positioning portion is embedded in the first recessed positioning portion, and the three-claw sleeve petal assembly is in a closed state; When the screw locking device is in the second state, the raised positioning portion moves out of the first recessed positioning portion, and the three-claw sleeve petal assembly is in an open state.

2. The screw locking device according to claim 1, characterized in that: The inner wall of the clamping assembly is provided with a gasket groove; The washer slot is used to engage with the washer of the screw to achieve precise positioning of the screw with the washer.

3. The screw locking device according to claim 2, characterized in that: The gasket slot includes a first annular slot and a second annular slot; The first annular groove is used for engaging with the elastic washer, and the second annular groove is used for engaging with the flat washer.

4. The screw locking device according to claim 1, characterized in that: In each sleeve petal body: the outer wall of the sleeve petal body has a second recessed positioning portion, and the O-ring is installed in the second recessed positioning portion.

5. The screw locking device according to claim 1, characterized in that: The O-ring is made of elastic material.

6. The screw locking device according to claim 1, characterized in that: In each sleeve petal body: The sleeve petal body has a third wedge-shaped surface and a fourth wedge-shaped surface; When the screw is aligned with the electric screwdriver head, the screw can move along the fourth wedge-shaped surface in a direction close to the electric screwdriver head; When the screw is disengaged from the electric screwdriver head, the screw can move along the third wedge-shaped surface toward the electric screwdriver head.

7. The screw locking device according to any one of claims 1 to 6, characterized in that: The inner wall of the fixed sleeve has a first annular stepped inner stop to form a first inner mounting surface for fixed connection with the outer wall of the piston cylinder; The outer wall of the piston cylinder has a first annular stepped outer stop to form a first outer mounting surface for fixedly connecting with the inner wall of the fixed sleeve.

8. The screw locking device according to any one of claims 1 to 6, characterized in that: The inner wall of the piston cylinder has a second annular inner stop to form a second inner mounting surface for fixed connection with the outer wall of the cylinder; The outer wall of the cylinder has a second annular outer stop to form a second inner mounting surface for fixedly connecting with the outer wall of the piston cylinder.

9. A screw locking device, characterized in that: It comprises a vacuum pump assembly and a screw locking device according to any one of claims 1 to 8; The vacuum pump assembly is connected to the vacuum pump interface and is used to extract air from the cavity.

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