CN219131431U

CN219131431U - Screw locking device with telescopic screwdriver head

Info

Publication number: CN219131431U
Application number: CN202320173426.1U
Authority: CN
Inventors: 曾伟; 王光旭; 张梨
Original assignee: Jiangsu Zhongteng Intelligent Equipment Co ltd
Current assignee: Jiangsu Zhongteng Intelligent Equipment Co ltd
Priority date: 2023-02-10
Filing date: 2023-02-10
Publication date: 2023-06-06
Anticipated expiration: 2033-02-10

Abstract

The utility model discloses a screw locking device with a telescopic screwdriver head, which comprises: the transmission parts are at least two in number and are provided with end rotating shafts which are rotationally connected with the shaft seat; the electric batch is characterized in that an output end of the electric batch is connected with an end rotating shaft through a universal joint; one of the opposite ends of the connecting rod is fixedly connected with the batch head, and the other end of the connecting rod is in telescopic and movable connection with the transmission piece along the axial direction of the batch head and in rotary transmission connection with the transmission piece; further comprises: the elastic piece is arranged between the shaft seat and the connecting rod and has elastic deformation consistent with the axial direction of the batch head; and the limiting piece is configured to limit the connecting rod to be separated from the transmission piece. The screw locking device with the telescopic screwdriver head is provided with an elastic piece and a limiting piece; the deformation restoring force of the elastic piece enables the screwdriver head and the screw hole to be kept in effective abutting connection in the locking process; the working positions of at least two screwdriver heads in the same screw locking device are adaptively adjusted according to the height of the screw, the action time of a cylinder capable of driving a piece is not needed, and the screw locking efficiency is improved.

Description

Screw locking device with telescopic screwdriver head

Technical Field

The utility model relates to the technical field of automatic production, in particular to a screw locking device with a telescopic screwdriver head.

Background

In the assembly process of the assembly parts related to a plurality of adjacent screws, the production efficiency of a single locking pair is low, and the manual repeated fatigue degree is high. The improved technical scheme adopts a plurality of electric batches to act on adjacent screws simultaneously. In practical production, taking screw distribution as an example, when the screw pitch is smaller than the diameter of the electric screwdriver, the pitch of the screwdriver head needs to be reduced by the pitch-changing component. The basic structure of the variable-pitch assembly comprises a batch head and a transmission piece, wherein the transmission piece is connected between the electric batch and the batch head so as to realize the transmission of the rotation of the electric batch output end.

The basic structure of a single electric screwdriver comprises a telescopic screwdriver head, and the screwdriver head is kept fully abutted with a screw hole in the locking process. In the screw locking device comprising the variable-pitch assembly, the transmission part is mainly used for transmitting rotation of the electric screwdriver output end, and the axial telescopic transmission of the screwdriver head cannot be realized.

CN109304603a discloses a screw absorbing locking device, in order to avoid producing the damage with the screw hard contact on the work piece when the pole descends is criticized, the slider is connected with criticizing first revolution mechanic, be provided with the bearing frame on the slider, criticize pole lift cylinder and criticize the pole one-to-one and be connected, criticize pole lift cylinder action and drive connecting rod, bearing frame and criticize the pole and follow the pole axial displacement of criticizing, realize criticizing the flexible of pole different range, satisfy the use condition that screw position distribution is unanimous but screw high-low position is different. However, the variable-pitch assembly has a complex structure and occupies a large space; the simultaneous use of two cylinders also increases the failure rate of the variable-pitch assembly; the more the number of cylinders in the variable-pitch assembly, the higher the failure rate; the precision of cylinder is relatively poor, is unfavorable for the abundant butt of criticizing head and screw hole.

Disclosure of Invention

One of the purposes of the utility model is to overcome the defects in the prior art, and provide a screw locking device with a telescopic screwdriver head, which realizes axial telescopic screwdriver head through an elastic piece abutted with the screwdriver head and a shaft seat, is convenient for the effective and full abutting of the screwdriver head and a screw hole, and has a simple and compact overall structure.

In order to achieve the technical effects, the technical scheme of the utility model is as follows: a screw locking device with a retractable screwdriver bit, comprising:

the transmission parts are at least two in number and are provided with end rotating shafts which are rotationally connected with the shaft seat;

the output end of the electric batch is connected with the end rotating shaft through a universal joint;

one of the opposite ends of the connecting rod is fixedly connected with the batch head, and the other end of the connecting rod is in telescopic and movable connection along the axial direction of the batch head and is in rotary transmission connection with the transmission piece; further comprises:

the elastic piece is arranged between the shaft seat and the connecting rod and has elastic deformation consistent with the axial direction of the batch head;

and the limiting piece is configured to limit the connecting rod to be separated from the transmission piece.

The preferable technical scheme is that the transmission piece comprises a transmission shaft, the transmission shaft is provided with radial protrusions, the connecting rod is provided with concave parts extending along the axial direction of the batch head, and the concave parts are in concave-convex fit with the radial protrusions.

The preferable technical scheme is that the elastic piece is sleeved on the periphery of the transmission piece.

The preferable technical scheme is that the transmission piece is a straight prism.

The preferable technical scheme is that the connecting rod is provided with a mounting hole, and the straight prism is inserted into the mounting hole in a clearance fit manner.

The preferable technical scheme is that the limiting piece comprises a blocking piece fixedly connected with the shaft seat, the connecting rod is provided with an abutting portion, and the blocking piece is blocked and arranged on the side of the abutting portion along the axial direction of the batch head.

The preferable technical scheme is that the blocking piece comprises a guide sleeve, and the connecting rod movably penetrates through the guide sleeve.

The preferable technical proposal is that the device also comprises a base and a rotary transmission piece; the shaft seat is detachably and fixedly connected with the base; the rotary transmission part comprises two transmission elements which are telescopically combined and can be separated; one of the two transmission elements is connected with the telescopic output end of the electric batch through a universal joint, and the other transmission element is connected with the transmission piece through the universal joint.

The preferable technical scheme is that at least two transmission parts are rotationally connected with the same shaft seat.

The preferable technical proposal is that the electric batch and the shaft seat are fixedly connected with the base; the automatic screwdriver further comprises a guide rail and a base driving piece, wherein the extending direction of the guide rail is consistent with the axial direction of the screwdriver head, and the base driving piece is configured to drive the base to move along the guide rail.

The utility model has the advantages and beneficial effects that:

the screw locking device with the telescopic screwdriver head is provided with an elastic piece and a limiting piece; the screwdriver head abuts against the screw hole before the screw is locked and compresses the elastic piece, and the deformation restoring force of the elastic piece enables the screwdriver head to keep effective abutting against the screw hole in the locking process;

the working positions of at least two screwdriver heads in the same screw locking device are adaptively adjusted according to the height of the screw, and the action time of a cylinder capable of driving a piece is not needed, so that the screw locking efficiency is improved;

the screw locking device has simple structure, compact elastic piece setting and low overall failure rate of equipment.

Drawings

FIG. 1 is a schematic top view of a screw locking device with a retractable screwdriver bit;

FIG. 2 is a schematic top view of another embodiment of a screw locking device with a retractable screwdriver bit;

FIG. 3 is a schematic diagram of a connection structure of a universal joint, a shaft seat, a transmission member and a batch head in an embodiment;

FIG. 4 is a schematic front view of a screw locking device with a retractable screwdriver bit according to an embodiment;

FIG. 5 is a schematic diagram of the connection structure of the driving member and the batch head;

in the figure: 1. a transmission member; 101. an end rotating shaft; 102. a transmission shaft; 2. electric batch; 3. a connecting rod; 301. an abutting portion; 302. a mounting hole; 4. an elastic member; 5. a limiting piece; 51. a blocking member; 511. a guide sleeve; 6. a shaft seat; 7. a universal joint; 8. a bearing; 9. a head is batched; 10. a base; 11. a rotary transmission member; 111. a first transmission element; 112. a second transmission element; 12. a guide rail; 13. and a base driving member.

Detailed Description

The following describes the utility model in further detail with reference to examples. The following examples are only for more clearly illustrating the technical aspects of the present utility model, and are not intended to limit the scope of the present utility model.

In the description of the present application, it is to be noted that, unless otherwise indicated, the meaning of "plurality" is two or more; the terms "upper," "lower," "left," "right," "inner," "outer," and the like indicate an orientation or positional relationship merely for convenience of description and to simplify the description, and do not indicate or imply that the devices or elements being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus are not to be construed as limiting the present application.

In the description of the present utility model, it should also be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected. The specific meaning of the above terms in the present utility model can be understood as appropriate by those of ordinary skill in the art.

Examples

As shown in fig. 1-3, the screw locking device with the telescopic screwdriver head in the embodiment comprises a transmission part 1, an electric screwdriver 2, a connecting rod 3, an elastic part 4 and a limiting part 5; the number of the transmission parts 1 is at least two, and the transmission parts 1 are provided with end rotating shafts 101 which are rotationally connected with the shaft seat 6; the output end of the electric batch 2 is connected with an end rotating shaft 101 through a universal joint 7; one of the opposite ends of the connecting rod 3 is fixedly connected with the batch head 9, and the other end is in telescopic and movable connection along the axial direction of the batch head and in rotary transmission connection with the transmission piece 1; the elastic piece 4 is arranged between the shaft seat 6 and the connecting rod 3, and the elastic piece 4 has elastic deformation consistent with the axial direction of the batch head 9; the limiter 5 is configured to limit the detachment of the connecting rod 3 from the transmission member 1.

In the device for narrowing the distance between the heads 9 by means of a pitch changing assembly, the transmission element 1 and the connecting rod 3 are preferably connected in a one-to-one correspondence. Two connection relations between the electric batch 2 and the transmission piece 1 are as follows: one electric batch 2 is connected with more than two transmission pieces 1 through the transmission pieces 1 and realizes the transmission of the rotation of the electric batch 2, or the electric batch 2 is connected with the transmission pieces 1 in a one-to-one correspondence manner; in the latter scheme, the transmission efficiency of the electric batch 2 is high, and the working time of the electric batch 2 can be the same or different; or the rotation speed of the electric batch 2 can be the same or different based on the same working time length. In fig. 1-4, the electric batch 2, the transmission piece 1 and the connecting rod 3 are connected in a one-to-one correspondence manner, and the number of the electric batch is four.

The elastic member 4 includes, but is not limited to, a compression spring. The compressed elastic member 4 applies a deformation restoring force to the connecting rod 3 toward the head 9, and the deformation restoring force of the compression spring is more centered with the head 9 than other elastic members 4 eccentric to the transmission member 1 to reduce deflection of the head 9.

The limiting member 5 is used for limiting the connecting rod 3 and the transmission member 1 from being separated from each other, and specific structures of the limiting member 5 include, but are not limited to: the limiting piece 5 is connected with the elastic piece 4, for example, two ends of the elastic piece 4 are respectively connected with the shaft seat 6 and the connecting rod 3; or the limiting piece 5 is arranged between the connecting rod 3 and the transmission piece 1, for example, one of the connecting rod 3 and the transmission piece 1 is provided with a long hole, the other is provided with a radial bulge which is matched with the concave-convex of the long hole, the long side direction of the long hole is consistent with the axial direction of the screwdriver bit, and the long hole is used for limiting the connecting rod 3 to be separated from the transmission piece 1.

Alternatively, the limiting piece 5 may be further connected to the shaft seat 6, and when the batch head 9 is located at the bottom end of the connecting rod 3 in a working state, the limiting piece 5 is blocked in the downward path of the connecting rod 3 to define the lowest position of the connecting rod 3 and the batch head 9. When the connecting rod 3 is at the lowest position, the bottom end of the pressure spring is pressed and connected with the screwdriver bit 9; the top end of the pressure spring is propped against the shaft seat or is mutually spaced from the shaft seat.

In fig. 3, an end rotating shaft 101 of a transmission member 1 is connected with a shaft seat 6 through a bearing 8, and the end rotating shaft 101 is connected with a universal joint 7 in a pin joint manner; when the pressure spring is in a compressed state, the first end of the pressure spring is abutted with the bearing 8, and the second end of the pressure spring is abutted with the connecting rod 3. Alternatively, the first end of the compression spring may also abut the shaft seat 6 at the outer periphery of the bearing 8.

In another embodiment, as shown in fig. 3, the transmission member 1 comprises a transmission shaft 102, the transmission shaft 102 is provided with radial protrusions, and the connecting rod 3 is provided with concave parts extending along the axial direction of the batch head, and the concave parts are matched with the radial protrusions in a concave-convex manner.

As an equivalent alternative to the connection of the transmission member 1 and the connecting rod 3, the driving end of the connecting rod 3 is provided with a driving shaft 102, the driving shaft 102 is provided with radial protrusions, and the transmission member 1 is provided with recesses extending axially along the head. Specifically, the radial bulge is a radial convex column, the concave part extending along the axial direction of the batch head is a long hole, the radial convex column penetrates through the long hole, and the long side direction of the long hole is consistent with the axial direction of the batch head 9. Further, more than two radial protrusions are uniformly distributed on the periphery of the transmission shaft 102 to disperse the acting force of the batch head 9 on the radial protrusions.

In another preferred embodiment, as shown in fig. 3, the elastic member 4 is sleeved on the outer periphery of the transmission member 1.

When the transmission piece 1 is sleeved on the periphery of the connecting rod 3, the elastic piece 4 can be arranged at the bottom of the blind hole of the transmission piece 1, one end of the elastic piece 4 is propped against the bottom surface of the blind hole of the transmission piece 1, and the other end is propped against the end surface of the connecting rod 3. Compared with the elastic piece 4 arranged in the blind hole, the elastic piece 4 sleeved on the periphery of the transmission piece 1 is convenient for assembly, observation of the use state and replacement and maintenance.

In another preferred embodiment, as shown in fig. 3 and 5, the transmission member 1 is a straight prism. The radial convex column stress that transmission shaft 102 set up is concentrated, compares with radial convex column, and the rotatory transmission efficiency of straight prism is higher and transmission structure is stable. The cross section of the straight prism in fig. 5 is a regular hexagon.

In another preferred embodiment, as shown in fig. 5, the connecting rod 3 is provided with a mounting hole 302 (i.e. a recess extending axially along the head), and a straight prism is clearance fit into the mounting hole 302. The mounting hole 302 and the transmission piece 1 of the straight prism have larger transmission abutting area, and the transmission of rotary power at the output end of the electric batch 2 is facilitated.

In another preferred embodiment, as shown in fig. 2-3, the limiting member 5 comprises a blocking member 51 fixedly connected with the shaft seat 6, the connecting rod 3 is provided with an abutment 301, and the blocking member 51 is blocked at the side of the abutment 301 along the axial direction of the head 9. The stopper 51 is a baffle plate, or a cylindrical stopper fixedly provided to the baffle plate as shown in fig. 3. Alternatively, the abutting portion 301 and the blocking member 51 are disposed on one side of the central axis of the connecting rod 3, or the abutting portion 301 and the blocking member 51 are uniformly distributed on the outer periphery of the central axis of the connecting rod 3, where the abutting portion 301 is an abutting ring disposed on the outer periphery of the connecting rod 3, and the cylindrical blocking member is opposite to the abutting ring along the axial direction of the batch head 9. When the abutting ring abuts against the cylindrical blocking piece, the gap between the batch head 9 and the main body of the electric batch 2 is the largest.

In another preferred embodiment, as shown in fig. 3, the blocking member 51 includes a guide sleeve 511, and the connecting rod 3 is movably inserted into the guide sleeve 511. The cylindrical stopper, i.e., the guide sleeve 511 has a certain length for guiding the displacement of the connecting rod 3 in the axial direction of the head to improve the positional accuracy of the connecting rod 3. Optionally, the guide sleeve 511 is in sliding friction or rolling friction with the connecting rod 3. Rolling elements, such as ball cages, which achieve rolling friction.

As shown in fig. 1, 2 and 4, in another preferred embodiment, the screw locking device with the telescopic batch rod 3 further comprises a base 10 and a rotary transmission member 11; the shaft seat 6 is detachably and fixedly connected with the base 10; the rotary transmission 11 comprises a first transmission element 111 and a second transmission element 112 which are telescopically combined and can be separated, wherein the first transmission element 111 is connected with the output end of the electric batch 2 through a universal joint, and the second transmission element 112 is connected with the transmission 1 through the universal joint.

The electric batch has a telescopic output. When the shaft seat 6, the connecting rod 3 and the batch head 9 need to be removed, the output end is only required to be pushed against the electric batch main body, so that the first transmission element 111 and the second transmission element 112 move back to back, the length of the assembly of the rotary transmission piece 11 is increased until the first transmission element 111 is separated from the second transmission element 112, and then the shaft seat 6 is removed from the base 10. Optionally, the driving end of one of the first driving element 111 and the second driving element 112 is a straight prism, and the other is a shaft sleeve inserted with the straight prism. The length of the straight prism and the shaft sleeve which move away from each other is determined according to the telescopic travel of the electric batch output end.

The shaft seat 6 is connected with the transmission parts 1 in a one-to-one correspondence manner, or more than two transmission parts 1 are rotatably arranged on the same shaft seat 6. In another preferred embodiment, as shown in fig. 3, at least two transmission members 1 are rotatably connected to the same shaft seat 6. The distribution mode of the driving piece 1 on the shaft seat 6 is consistent with the position of the screw on the assembled workpiece. Through installation and dismantlement axle bed 6, realize that connecting rod 3 is installed and dismantles fast in batches, do benefit to the installation and the maintenance efficiency that improve connecting rod 3.

In another preferred embodiment, as shown in fig. 4, both the electric batch 2 and the shaft seat 6 are fixedly connected with the base 10; and further comprises a guide rail 12 and a base driving member 13, wherein the extending direction of the guide rail 12 is consistent with the axial direction of the batch head 9, and the base driving member is configured to drive the base 10 to move along the guide rail 12. Before the screw locking device is used, the base driving piece drives the base 10 to move to one side of a workpiece until the connecting rods 3 are respectively and fully abutted with corresponding screws, the elastic piece 4 is compressed, then the electric screwdriver 2 is started, and the electric screwdriver 2 drives the transmission piece 1 and the connecting rods 3 to rotate, and the screws are screwed or unscrewed; and then closing the electric screwdriver 2, driving the base 10 to deviate from the assembled workpiece by the base driving piece until the connecting rod 3 is separated from the corresponding screw, recovering the deformation of the elastic piece 4, and guiding out the assembled workpiece from the locking station opposite to the screw locking device.

In fig. 4, the guide rail is a linear guide rail, and the base driving member 13 is a driving member that performs linear reciprocating motion, including but not limited to a linear driving member, and may be a cylinder, a hydraulic cylinder or an electric cylinder.

The foregoing is merely a preferred embodiment of the present utility model, and it should be noted that it will be apparent to those skilled in the art that several modifications and variations can be made without departing from the technical principle of the present utility model, and these modifications and variations should also be regarded as the scope of the utility model.

Claims

1. A screw locking device with a retractable screwdriver bit, comprising:

one of the opposite ends of the connecting rod is fixedly connected with the batch head, and the other end of the connecting rod is in telescopic and movable connection along the axial direction of the batch head and is in rotary transmission connection with the transmission piece; characterized by further comprising:

2. The screw locking device with the telescopic screwdriver head as claimed in claim 1, wherein the transmission member comprises a transmission shaft, the transmission shaft is provided with radial protrusions, the connecting rod is provided with concave parts extending along the axial direction of the screwdriver head, and the concave parts are in concave-convex fit with the radial protrusions.

3. The screw locking device with the telescopic screwdriver bit according to claim 1 or 2, wherein the elastic piece is sleeved on the periphery of the transmission piece.

4. The screw locking device with the telescopic screwdriver bit according to claim 2, wherein the transmission member is a straight prism.

5. The screw locking device with the telescopic screwdriver head as claimed in claim 4, wherein the connecting rod is provided with a mounting hole, and the straight prism is inserted into the mounting hole in a clearance fit manner.

6. The screw locking device with the telescopic screwdriver head as claimed in claim 1, wherein the limiting piece comprises a blocking piece fixedly connected with the shaft seat, the connecting rod is provided with an abutting portion, and the blocking piece is blocked at the side of the abutting portion along the axial direction of the screwdriver head.

7. The screw lock assembly with retractable screwdriver bit of claim 6, wherein the blocking member comprises a guide sleeve, and the connecting rod is movably disposed through the guide sleeve.

8. The screw locking device with the telescopic screwdriver bit according to claim 1, further comprising a base and a rotary transmission member; the shaft seat is detachably and fixedly connected with the base; the rotary transmission part comprises two transmission elements which are telescopically combined and can be separated; one of the two transmission elements is connected with the telescopic output end of the electric batch through a universal joint, and the other transmission element is connected with the transmission piece through the universal joint.

9. The screw locking device with telescopic screwdriver bit according to claim 1, wherein at least two of said driving members are rotatably connected to the same shaft seat.

10. The screw locking device with the telescopic screwdriver bit according to claim 1, wherein the electric screwdriver bit and the shaft seat are fixedly connected with the base; the automatic screwdriver further comprises a guide rail and a base driving piece, wherein the extending direction of the guide rail is consistent with the axial direction of the screwdriver head, and the base driving piece is configured to drive the base to move along the guide rail.