Screw chuck mechanism

Abstract

The utility model relates to the technical field of screw installation tools, in particular to a screw chuck mechanism which comprises a fixed seat, a pre-tightening assembly and two sets of clamping jaws, the fixed seat is provided with a feeding port, one ends of the two sets of clamping jaws are movably connected to the two sides of the fixed seat respectively, and the other ends of the two clamping jaws are provided with cohesion ports respectively. The pre-tightening assembly is arranged between the two sets of clamping jaws, the two cohesion openings are in butt joint through the pre-tightening assembly to form a guide clamping opening, the guide clamping opening is located below the feeding opening, and the central axis of the guide clamping opening coincides with the central axis of the feeding opening. The feeding port is formed in the front end of the fixing base, and one end of each clamping jaw is movably connected to the rear end of the fixing base. The movable connection position of the clamping jaw and the fixing seat is moved backwards, only the part, located below the feeding port, of the front end of the fixing seat rotates when the clamping jaw swings, interference between the clamping jaw and a part is reduced, and the automatic screw locking device can be suitable for automatic screw locking of complex parts with high side walls.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical fields of screw installation tools, more particularly to a screw chuck mechanism. BACKGROUND

[0002] Screw chucks are widely used in factory automation production, and mainly serve to keep screws above screw holes, so that when the electric screwdriver head is lowered, the screw chuck is opened to screw the screw into the screw hole to be assembled. The screw chuck plays a crucial role in improving production efficiency and assembly quality in both part assembly and finished product assembly.

[0003] Traditional chucks generally have a screw feeding port and a screw guide on a workpiece, and the swinging center surface of the chuck coincides with the center surface of the electric screwdriver. This is suitable for flat parts. However, when the part structure is complex, especially when there is a high side wall beside the screw hole, the opening of the chuck is restricted, and even the chuck cannot be opened, which causes the machine to be unable to use.

[0004] The prior art discloses a screw chuck, which has a center body with a coupling shoulder for connecting the chuck to the head support of an automatic screwdriver, the center body has a central groove, a sleeve with a channel is rotatably arranged in the central groove, each screw is inserted into the channel from the head support of the automatic screwdriver, the center body has two opposite guides, each guide is used for a clamping jaw, the clamping jaw is pivotally fixed on the center body by a bolt, each clamping jaw has a guide leg arranged in the guide and a free leg as a clamping jaw, each guide has a recess, a spring element is supported on the bottom of the recess, and the other end of the spring element is supported on the side surfaces of the guide legs facing each other. In this scheme, the swinging center surface of the two clamping jaws coincides with the center surface of the sleeve. When the part structure is complex, especially when there is a high side wall beside the screw hole, the opening path of the clamping jaw interferes with the side wall of the part, and the opening of the clamping jaw is restricted, which causes the clamping jaw to be unable to be smoothly opened. SUMMARY

[0005] The utility model aims at overcoming the deficiency that the prior art cannot be applied to screw locking of complex parts with high side walls, and provides a screw chuck mechanism, which can reduce interference with parts and meet the needs of automatic screw locking of complex parts.

[0006] To solve the above technical problems, the utility model adopts the technical scheme: provide a screw chuck mechanism, including fixed base, pre -tightening subassembly and two groups of clamping jaw, the fixed base is equipped with feed port, two groups the one end of clamping jaw is respectively mobilely connected in the both sides of fixed base, the other end of two clamping jaw is equipped with the hug mouth respectively, pre -tightening subassembly is located between two groups clamping jaw, two hug mouth is connected through pre -tightening subassembly and forms the guide clamp mouth, the guide clamp mouth is located below feed port, and the central axis of guide clamp mouth coincides with the central axis of feed port, the feed port is located in the front end of fixed base, and the one end of two groups clamping jaw is respectively mobilely connected in the rear end of fixed base.

[0007] The screw chuck mechanism of the utility model, under the standby state, two clamping jaws are folded under the action of pre-tightening subassembly, so that two hug mouths are connected to form a guide clamp mouth below the feed port, during use, the guide clamp mouth is located directly above the screw hole on the part, the screw rod of the screw is downward into the feed port, and is guided to the guide clamp mouth through the feed port, the electric screwdriver head is lowered and screwed, and the guide clamp mouth is opened during downward movement to screw into the screw hole to be assembled, the assembly is completed, the electric screwdriver head is withdrawn from the feed port, and two clamping jaws are reset under the action of pre-tightening subassembly. The utility model moves the movable connection position of the clamping jaw and the fixed base backward, only the part below the feed port of the front end of the fixed base rotates when the clamping jaw swings, the interference between the clamping jaw and the part is reduced, and the screw automatic locking can be applied to complex parts with high side walls.

[0008] Further, the rear end of the fixed base is provided with a guide on both sides, and one end of the two clamping jaws is rotatably connected to the two guides through a rotating shaft. When the screw is automatically locked, the screw enters the feed port, the electric screwdriver head is lowered into the feed port and rotates the screw, the guide clamp mouth is extruded, the clamping jaw rotates around the rotating shaft against the tension of the pre-tightening subassembly, the guide clamp mouth is gradually opened, after the screw assembly is completed, the electric screwdriver head is withdrawn from the feed port, and the two clamping jaws rotate around the rotating shaft under the action of the pre-tightening subassembly to reset for next use.

[0009] Further, the clamping jaw comprises a guide part and a chuck part, the guide part is rotatably connected to the guide through the rotating shaft, and the hug mouth is arranged on the chuck part. During the process of screw locking, the electric screwdriver head is lowered and screwed, the hug mouth is extruded, the chuck part is pushed, the guide part is driven by the chuck part, the guide part and the guide are used for guiding, and the two chuck parts open to the both sides of the fixed base; after the screw assembly is completed, the electric screwdriver head is withdrawn, the pre-tightening subassembly acts on the guide part, the guide part rotates around the rotating shaft in the guide, the chuck part swings, and the hug mouth is connected to form the guide clamp mouth.

[0010] Further, the guide clamp includes a fixed clamp and an adjusting clamp, the fixed clamp is located between the feeding port and the adjusting clamp, and an inner diameter of the fixed clamp gradually decreases from one end close to the feeding port to the other end close to the adjusting clamp. The screw is guided to the one end of the adjusting clamp away from the fixed clamp by the gradually decreasing inner diameter of the fixed clamp from the feeding port to the fixed clamp. It should be noted that the clamping jaws with different inner diameters of the adjusting clamp can be selected and replaced according to actual needs to adapt to locking of screws of different specifications.

[0011] Further, the inner diameter of the one end of the fixed clamp close to the feeding port is equal to the inner diameter of the feeding port. The coaxiality of the fixed clamp and the feeding port can be ensured, so that the screw can smoothly fall into the guide clamp.

[0012] Further, the pre-tightening assembly includes a reset member and a pull pin arranged on each of the two clamping jaws, the pull pin is located on the side of the clamping jaw away from the feeding port, and the two ends of the reset member are connected to the two pull pins, respectively. The reset member is located on the outer side of the fixed seat, so that maintenance is more convenient. When the clamping jaw needs to be replaced, the pre-tightening assembly can be conveniently disassembled, the clamping jaw is replaced, and the pre-tightening assembly is reassembled.

[0013] Further, the reset member is a reset tension spring.

[0014] Further, the fixed seat is further provided with a mounting seat. According to actual needs, the mounting seat can be arranged at the top or both sides of the fixed seat.

[0015] Further, the mounting seat is mounted on the machine through a connecting piece.

[0016] Further, the mounting seat is provided with a U-shaped hole, and the connecting piece is arranged in the U-shaped hole. The connecting position of the mounting seat and the machine can be adjusted through the U-shaped hole.

[0017] Compared with the prior art, the utility model discloses the following beneficial effects: the movable connecting position of the clamping jaw and the fixed seat is moved backward, the front end of the fixed seat only rotates the part below the feeding port when the clamping jaw swings, the interference of the clamping jaw and the part is reduced, and the screw automatic locking of the complex part with high side wall can be applied. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 It is the use schematic drawing of the screw chuck mechanism in the utility model embodiment;

[0019] Figure 2 It is the structure schematic drawing of the screw chuck mechanism in the utility model embodiment;

[0020] Figure 3 It is the structure schematic drawing of the fixed seat in the utility model embodiment;

[0021] Figure 4 It is the structure schematic view of the clamping jaw in the embodiment of the utility model.

[0022] In the drawing: 1 - fixed seat; 11 - feed inlet; 12 - guide; 2 - clamping jaw; 21 - guide portion; 211 - through hole; 212 - mounting hole; 22 - chuck portion; 221 - embracing mouth; 23 - guide clamp mouth; 231 - fixed clamp mouth; 232 - adjustment clamp mouth; 3 - rotating shaft; 4 - pre-tightening assembly; 41 - reset member; 42 - pull pin; 5 - mounting seat; 51 - U-shaped hole; 6 - part. DETAILED DESCRIPTION

[0023] The utility model will be further explained in connection with specific implementation. Among them, the drawing is only used for example explanation, and the representation is only schematic diagram, and not the real object drawing, and it can not be understood as the limitation of the patent of the utility model; in order to better illustrate the embodiment of the utility model, some components of the drawing will be omitted, enlarged or reduced, and it does not represent the size of actual product; for those skilled in the art, it is understandable that some well-known structures in the drawing and their description can be omitted.

[0024] The same or similar reference numerals in the drawings of the embodiments of the utility model correspond to the same or similar components; in the description of the utility model, it is understood that if the orientation or position relationship indicated by the terms "upper", "lower", "left", "right" etc. is based on the orientation or position relationship shown in the drawing, it is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the device or element indicated must have a particular orientation, a particular orientation and operation, therefore the terms describing the position relationship in the drawing are only used for example description, and can not be understood as the limitation of the patent, and for those skilled in the art, the specific meaning of the above terms can be understood according to the specific situation.

[0025] Embodiment one

[0026] The embodiment is the first embodiment of screw chuck mechanism, as shown in Figures 1 to 4 It includes fixed seat 1, pre-tightening assembly 4 and two groups of clamping jaws 2, fixed seat 1 is equipped with feed inlet 11, one end of two groups of clamping jaws 2 is movably connected to the two sides of fixed seat 1, the other end of two clamping jaws 2 is equipped with embracing mouth 221 respectively, pre-tightening assembly 4 is arranged between two groups of clamping jaws 2, two embracing mouths 221 are butt jointed to form guide clamp mouth 23 through pre-tightening assembly 4, guide clamp mouth 23 is located below feed inlet 11, and the center axis of guide clamp mouth 23 coincides with the center axis of feed inlet 11; feed inlet 11 is arranged at the front end of fixed seat 1, one end of two groups of clamping jaws 2 is movably connected to the rear end of fixed seat 1.

[0027] The screw chuck mechanism in the above embodiment is in the standby state, and the two clamping jaws 2 are closed under the action of the pre-tightening assembly 4, so that the two embracing openings 221 are butted to form the guide opening 23 below the feeding opening 11. When in use, the guide opening 23 is located directly above the screw hole on the part 6, the screw rod of the screw is downwardly inserted into the feeding opening 11 and guided to the guide opening 23 through the feeding opening 11, the electric screwdriver is lowered and screwed, the guide opening 23 is opened in the downward process to screw the screw into the screw hole to be assembled, after the assembly is completed, the electric screwdriver is withdrawn from the feeding opening 11, and the two clamping jaws 2 are reset under the action of the pre-tightening assembly 4. In the embodiment, the movable connection position of the clamping jaw 2 and the fixed seat 1 is moved backward, only the part of the front end of the fixed seat 1 below the feeding opening 11 is rotated when the clamping jaw 2 swings, the interference between the clamping jaw 2 and the part 6 is reduced, and the screw automatic locking can be applied to the complex part 6 with a high side wall.

[0028] As shown in Figures 1 to 3 , the rear end of the fixed seat 1 is provided with a guide 12 on each side, and one end of each of the two clamping jaws 2 is rotatably connected to the two guides 12 through the rotating shaft 3. In the implementation, the pre-tightening assembly 4 pulls the two clamping jaws 2, so that the two embracing openings 221 are butted to form the guide opening 23 below the feeding opening 11. When the screw is automatically locked, the screw is inserted into the feeding opening 11, the electric screwdriver is lowered into the feeding opening 11 and the guide opening 23 to rotate the screw, the guide opening 23 is extruded, the clamping jaw 2 rotates around the rotating shaft 3 against the pulling force of the pre-tightening assembly 4, the guide opening 23 is gradually opened, after the screw assembly is completed, the electric screwdriver is withdrawn from the feeding opening 11, the two clamping jaws 2 rotate around the rotating shaft 3 under the action of the pre-tightening assembly 4 to realize resetting, and the next use is facilitated.

[0029] As shown in Figure 1 , Figure 2 and Figure 4 , the clamping jaw 2 comprises a guide part 21 and a chuck part 22 which are connected, the guide part 21 is rotatably connected to the guide 12 through the rotating shaft 3, and the embracing opening 221 is arranged on the chuck part 22. When the screw is locked, the electric screwdriver is lowered and screwed in the process of rotating the screw, the embracing opening 221 is extruded, the chuck part 22 is pushed, the guide part 21 is driven through the chuck part 22, the guide part 21 and the guide 12 are used for guiding, and the two chuck parts 22 are opened to the two sides of the fixed seat 1; after the screw assembly is completed, the electric screwdriver is withdrawn, the pre-tightening assembly 4 acts on the guide part 21, the guide part 21 rotates around the rotating shaft 3 in the guide 12, the chuck part 22 swings, and the embracing opening 221 is butted to form the guide opening 23.

[0030] Embodiment Two

[0031] The second embodiment of the screw chuck mechanism is similar to the first embodiment, and the difference lies in that, as shown in Figure 4As shown, the guide clamp 23 includes a fixed clamp 231 and an adjusting clamp 232. The fixed clamp 231 is located between the feed inlet 11 and the adjusting clamp 232. The inner diameter of the fixed clamp 231 gradually decreases from the end closer to the feed inlet 11 to the end closer to the adjusting clamp 232. In practice, the screw transitions from the feed inlet 11 to the fixed clamp 231, and the inner diameter of the fixed clamp 231 gradually decreases so as to guide the end of the screw with the screw rod to the end of the adjusting clamp 232 away from the fixed clamp 231.

[0032] The inner diameter of the end of the fixing clamp 231 near the feed port 11 is equal to the inner diameter of the feed port 11. This embodiment ensures that the fixing clamp 231 is coaxial with the feed port 11, so that the screw can fall smoothly into the guide clamp 23.

[0033] It should be noted that the clamps 2 with different inner diameters of the clamp 232 can be selected and replaced according to actual needs to accommodate the tightening of screws of different specifications.

[0034] Example 3

[0035] This embodiment is the third embodiment of the screw chuck mechanism. This embodiment is similar to embodiment two, except that, as shown in the following... Figure 1 , Figure 2 As shown, the pre-tightening assembly 4 includes a reset member 41 and pull pins 42 respectively disposed on the two grippers 2. The pull pins 42 are located on the side of the grippers 2 away from the feed inlet 11, and the two ends of the reset member 41 are respectively connected to the two pull pins 42. Specifically, one end of the guide part 21 is provided with a through hole 211, the middle part of the guide part 21 is provided with a mounting hole 212, the other end of the guide part 21 is connected to the clamping head 22, the rotating shaft 3 passes through the through hole 211, the pull pin 42 is installed in the mounting hole 212 and the pull pin 42 protrudes from the side of the guide part 21, the reset member 41 is a reset spring, the part of the pull pin 42 protruding from the guide part 21 is provided with a slot, and the two ends of the reset spring are respectively hooked into the two slots. The clamping head 22 provides reset tension through the reset spring, and the reset spring is located outside the fixed seat 1, which makes maintenance more convenient. When it is necessary to replace the grippers 2, the pre-tightening assembly 4 can be easily removed to replace the grippers 2 and the pre-tightening assembly 4 can be reinstalled.

[0036] Example 4

[0037] This embodiment is the fourth embodiment of the screw chuck mechanism. This embodiment is similar to embodiment three, except that, as Figures 1 to 3 As shown, the fixed base 1 is also provided with a mounting base 5. Depending on actual needs, the mounting base 5 can be set at the top or sides of the fixed base 1.

[0038] Mounting base 5 is mounted to the machine via a connector. Specifically, as shown... Figures 1 to 3As shown, the mounting seat 5 is provided with a U-shaped hole 51, and the connecting piece is arranged in the U-shaped hole 51. The connecting position of the mounting seat 5 and the machine can be adjusted through the U-shaped hole 51.

[0039] The working principle of the screw chuck mechanism of the embodiment is as follows: according to actual needs, the mounting seat 5 is arranged on the fixed seat 1, and the mounting seat 5 is connected with the machine by arranging the connecting piece in the U-shaped hole 51; under the action of the pre-tightening assembly 4, the abutting guide clamping opening 23 is formed by the abutting opening 221, the top of the fixed clamping opening 231 is flush with the inner wall of the feeding opening 11, so that the screw can smoothly fall into the fixed clamping opening 231, the adjusting clamping opening 232 is aligned with the screw hole on the part 6, the screw enters the feeding opening 11 and is guided to the guide clamping opening 23, the electric screwdriver head is lowered into the feeding opening 11, the screw is rotated in the process of the electric screwdriver head descending, the guide clamping opening 23 is opened, the chuck part 22 and the guide part 21 swing, the guide part 21 swings around the rotating shaft 3 in the guide 12 at the rear end of the fixed seat 1, only the chuck part 22 at the front end of the fixed seat 1 is located below the feeding opening 11, the interference between the clamping jaw 2 and the part 6 is reduced, and the screw automatic locking is suitable for the complex part 6 with high side walls; after the assembly is completed, the electric screwdriver head is withdrawn, the reset spring is reset, the guide part 21 and the chuck part 22 are rotated and reset, and the next use is facilitated.

[0040] In the specific contents of the above specific embodiments, any inconsistent combination of technical features can be combined, and in order to make the description simple, all possible combinations of the above technical features are not described, but as long as the combination of the technical features does not exist, it should be considered that it is within the scope of the description.

[0041] Obviously, the above embodiments of the utility model are only examples for clearly illustrating the utility model, and are not limitations on the embodiments of the utility model. For ordinary skilled persons in the art, other different forms of changes or changes can be made on the basis of the above description. Here, all the embodiments are not enumerated. Any modification, equivalent replacement and improvement made within the spirit and principle of the utility model should be included in the protection scope of the utility model claims.

Claims

1. A screw chuck mechanism, comprising a fixed seat (1), a pre-tightening assembly (4) and two sets of clamping jaws (2), the fixed seat (1) being provided with a feeding port (11), one end of each of the two sets of clamping jaws (2) being movably connected to the two sides of the fixed seat (1), the other end of each of the two clamping jaws (2) being provided with a clamping opening (221), the pre-tightening assembly (4) being arranged between the two sets of clamping jaws (2), the two clamping openings (221) being butted to form a guide clamping opening (23) through the pre-tightening assembly (4), the guide clamping opening (23) being located below the feeding port (11), and the central axis of the guide clamping opening (23) coinciding with the central axis of the feeding port (11); characterized in that, The feeding port (11) is arranged at the front end of the fixed base (1), and one end of each of the two sets of clamping jaws (2) is movably connected to the rear end of the fixed base (1).

2. The screw chuck mechanism according to claim 1, characterized by The rear end of the fixed base (1) is provided with a guide member (12) on each side, and one end of each of the two clamping jaws (2) is rotatably connected to the two guide members (12) through a rotating shaft (3).

3. The screw chuck mechanism according to claim 2, wherein The clamping jaw (2) comprises a guide part (21) and a chuck part (22) connected together, the guide part (21) is rotatably connected to the guide member (12) through the rotating shaft (3), and the embracing opening (221) is arranged on the chuck part (22).

4. The screw chuck mechanism according to claim 1, wherein The guide clamping opening (23) comprises a fixed clamping opening (231) and an adjusting clamping opening (232), the fixed clamping opening (231) is located between the feeding port (11) and the adjusting clamping opening (232), and the inner diameter of the fixed clamping opening (231) gradually decreases from one end close to the feeding port (11) to the other end close to the adjusting clamping opening (232).

5. The screw chuck mechanism according to claim 4, wherein The inner diameter of the one end of the fixed clamping opening (231) close to the feeding port (11) is equal to the inner diameter of the feeding port (11).

6. The screw chuck mechanism according to claim 1, wherein The pre-tightening assembly (4) comprises a reset member (41) and a pull pin (42) arranged on each of the two clamping jaws (2), the pull pin (42) is located on the side of the clamping jaw (2) away from the feeding port (11), and the two ends of the reset member (41) are connected to the two pull pins (42) respectively.

7. The screw chuck mechanism according to claim 6, wherein The reset member (41) is a reset tension spring.

8. A screw chuck mechanism according to any one of claims 1 to 7, characterized in that The fixed base (1) is further provided with a mounting seat (5).

9. The screw chuck mechanism according to claim 8, wherein The mounting seat (5) is mounted on a machine through a connecting member.

10. The screw chuck mechanism according to claim 9, wherein The mounting seat (5) is provided with a U-shaped hole (51), and the connecting member is arranged in the U-shaped hole (51).

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