A screw locking fixture

Abstract

The utility model relates to the technical field of screw locking, and discloses a screw locking jig, including a base plate and a support plate arranged opposite to each other, wherein a positioning mechanism for supporting a workpiece is arranged on one side of the support plate opposite to the base plate, and a floating plate capable of moving toward the base plate is arranged on the other side; a jig head is fixedly mounted on the floating plate, a mounting hole for placing a nut is provided inside the jig head, and one end of the jig head passes through the support plate and extends to the bottom of the workpiece; a push rod corresponding to the number and position of the jig head is arranged on the base plate, and one end of the push rod extends into the mounting hole. The nut is embedded in the mounting hole of the jig head, and the jig head can be driven to move along the axis direction of the push rod through the floating plate, so that the push rod passes through the mounting hole to push out the nut, thereby solving the problem that the screw is stuck in the jig head and the workpiece cannot be taken out normally, and improving the efficiency and quality of screw locking.

Description

Technical Field

[0001] The utility model relates to the technical field of screw locking, in particular to a screw locking fixture. Background Art

[0002] The automatic screw locking machines currently available on the market can accurately record the torque and speed used to lock each screw corresponding to each PCBA (Printed Circuit Board Assembly); and the machine has an additional automatic detection function that can detect abnormal conditions such as screw floating, thread slippage, and missed locking, ensuring product quality and meeting key process requirements for automotive electronic products.

[0003] When the above-mentioned machine is locking the screws, the matching nut is first fixed in the corresponding position using a jig, and then the PCBA is placed on it. Then, one end of the screw is passed through the PCBA from above and screwed to the nut in the jig using the automatic screw locking machine, and finally the screw is locked on the PCBA.

[0004] Most of the existing nut fixing methods are to embed the nut into the fixture according to the shape. For example, the hexagonal nut is fixed when the screw locking machine is working; however, some screw locking requires a large torque, which will cause the screw to drive the nut to deflect in the fixture, thereby generating a large resistance between the nut and the inner wall of the fixture, and eventually causing the screw to get stuck in the fixture, resulting in the problem that the screw cannot be removed normally. Utility Model Content

[0005] The problem to be solved by the utility model is to provide a screw locking fixture, which drives the fixture head to move through a floating plate so that one end of a push rod can pass through a mounting hole to push out a nut stuck therein, thereby avoiding the situation where a workpiece cannot be normally removed.

[0006] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0007] A screw locking jig comprises a base plate and a support plate arranged opposite to each other, wherein a positioning mechanism for supporting a workpiece is arranged on one side of the support plate opposite to the base plate, and a floating plate capable of moving toward the base plate is arranged on the other side; a jig head is fixedly mounted on the floating plate, a mounting hole for placing a nut is provided inside the jig head, and one end of the jig head passes through the support plate and extends to the bottom of the workpiece; push rods corresponding to the number and position of the jig heads are arranged on the base plate, and one end of the push rods extends into the mounting holes.

[0008] In a preferred embodiment of the utility model, the bottom plate and the support plate are parallel to each other, and are connected via a guide rod, and the guide rod is penetrated on the floating plate.

[0009] In a preferred embodiment of the present invention, the guide rod is slidably connected to the floating plate via a linear bearing, and the linear bearing is fixedly mounted on the floating plate.

[0010] In a preferred embodiment of the utility model, a telescopic component is installed on the bottom plate, the output end of the telescopic component is connected to the floating plate, and the output end of the telescopic component is parallel to the guide rod.

[0011] In a preferred embodiment of the utility model, the positioning mechanism includes two first support blocks arranged opposite to each other, second support blocks are arranged on both sides of the first support block, and positioning platforms for supporting the workpiece are arranged on the inner sides of the first support block and the second support block.

[0012] In a preferred embodiment of the present invention, the positioning mechanism further comprises a cover plate which can be flipped in the longitudinal direction, and two ends of the cover plate are respectively connected to the two first supporting blocks.

[0013] In a preferred embodiment of the utility model, a hinge structure is installed on one of the first support blocks, and a positioning groove is opened on the other first support block; and one end of the cover plate is connected to the hinge structure, and the other end can be embedded in the positioning groove.

[0014] In a preferred embodiment of the utility model, a locking rod for locking the cover is arranged in the positioning groove, and a limiting block for limiting the flipping angle of the cover is arranged on one side of the first supporting block close to the hinge structure. Beneficial Effects

[0015] (1) In the utility model, the nut is embedded in the mounting hole of the jig head, and the jig head can be driven to move along the axial direction of the push rod through the floating plate, so that the push rod passes through the mounting hole to push the nut out, thereby solving the problem that the screw is stuck in the jig head and the workpiece cannot be removed normally, thereby improving the efficiency and quality of screw locking.

[0016] (2) In the present invention, the telescopic assembly can drive the floating plate to reciprocate along the axial direction of the guide rod. Under the action of the guide rod, the floating plate can be ensured to move smoothly. The linear bearing can reduce the friction and wear between the floating plate and the guide rod, thereby extending the service life of the fixture. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural schematic diagram of the utility model;

[0018] Figure 2 It is a main structural schematic diagram of the utility model;

[0019] Figure 3 It is a schematic diagram of the internal structure of the utility model;

[0020] Figure 4 It is a structural schematic diagram of the first and second support blocks of the utility model;

[0021] Figure 5 It is a structural schematic diagram of the fixture head of the utility model;

[0022] Among them, 1. bottom plate; 2. support plate; 3. floating plate; 4. fixture head; 41. mounting hole; 5. push rod; 6. positioning mechanism; 61. first support block; 62. second support block; 63. positioning platform; 64. positioning groove; 65. locking rod; 7. cover plate; 8. limit block; 9. telescopic assembly; 10. guide rod; 11. linear bearing. DETAILED DESCRIPTION

[0023] The present invention will now be further described in detail in conjunction with the accompanying drawings and embodiments. These drawings are simplified schematic diagrams that only illustrate the basic structure of the present invention in a schematic manner, and therefore only show the components related to the present invention.

[0024] like Figure 1-Figure 5 As shown, a screw locking jig comprises a base plate 1 and a support plate 2 which are arranged opposite to each other, a positioning mechanism 6 for supporting a workpiece is arranged on one side of the support plate 2 which is opposite to the base plate 1, and a floating plate 3 which can move toward the base plate 1 is arranged on the other side; a jig head 4 is fixedly mounted on the floating plate 3, a mounting hole 41 for placing a nut is opened inside the jig head 4, and one end of the jig head 4 passes through the support plate 2 and extends to the bottom of the workpiece; a push rod 5 corresponding to the number and position of the jig head 4 is arranged on the base plate 1, and one end of the push rod 5 extends into the mounting hole 41.

[0025] First, place the nut into the corresponding mounting hole 41 of the fixture head 4, and then fix the workpiece (the workpiece here refers to the PCBA) on the support plate 2 through the positioning mechanism 6, so that the nut corresponds to the hole position on the workpiece, and then use the existing automatic screw locking machine to make one end of the screw pass through the workpiece and then screw it into the threaded hole of the nut.

[0026] If the required torque is too large and causes the nut to deflect and get stuck in the mounting hole 41, the floating plate 3 is driven to move toward the bottom plate 1 to drive the fixture head 4 to slide along the push rod 5, so that one end of the push rod 5 can push the nut axially out of the mounting hole 41, thereby solving the problem that the screw is stuck in the fixture head 4 and the workpiece cannot be removed normally, thereby improving the efficiency and quality of screw locking.

[0027] Among them, one end of the push rod 5 is fixedly connected to the base plate 1, and the other end slides and extends into the mounting hole 41, and can push the nut out of the mounting hole 41; the mounting hole 41 can adopt a stepped hole to facilitate the placement of the nut, and the cross-sectional shape of the mounting hole 41 corresponds to the outer contour of the nut to limit the rotation of the nut in the mounting hole 41; if the mounting hole 41 adopts a straight hole, the nut can also be supported by the end of the push rod 5 after falling into the mounting hole 41.

[0028] As mentioned above, the bottom plate 1 and the support plate 2 are parallel to each other, and the two are connected by a guide rod 10, and the guide rod 10 is arranged on the floating plate 3. The two ends of the guide rod 10 are fixedly connected to the bottom plate 1 and the support plate 2 respectively, and the guide rod 10 is perpendicular to the support plate 2 and vertically penetrates the floating plate 3.

[0029] In order to reduce the friction and wear between the guide rod 10 and the floating plate 3 , the guide rod 10 and the floating plate 3 are slidably connected via a linear bearing 11 , and the linear bearing 11 is fixedly mounted on the floating plate 3 .

[0030] Furthermore, a telescopic assembly 9 is installed on the bottom plate 1, and the output end of the telescopic assembly 9 is connected to the floating plate 3, and the output end of the telescopic assembly 9 is parallel to the guide rod 10. The telescopic assembly 9 can be a module that outputs linear motion, such as a cylinder, an electric cylinder, or an oil cylinder. Here, a cylinder is preferably used, and the cylinder is fixedly installed at the center of the bottom plate 1, and the telescopic end of the cylinder is connected to the floating plate 3; through the telescopic movement of the cylinder, the floating plate 3 can be driven to move away from or close to the bottom plate 1.

[0031] In addition, four guide rods 10 are provided, arranged in groups of two, and symmetrically distributed between the base plate 1 and the support plate 2. The guide rods 10 can not only ensure the stability of the support plate 2, but also provide guidance for the displacement of the floating plate 3, thereby ensuring that the floating plate 3 can operate stably between the base plate 1 and the support plate 2.

[0032] like Figure 2-Figure 4 As shown, the positioning mechanism 6 includes two first support blocks 61 arranged opposite to each other, second support blocks 62 are arranged on both sides of the first support block 61, and positioning platforms 63 for supporting the workpiece are arranged on the inner sides of the first support block 61 and the second support block 62.

[0033] Specifically, two first support blocks 61 and two second support blocks 62 are distributed around the workpiece to position the workpiece, and the workpiece is supported by the positioning platform 63 inside thereof, and the positioning platform 63 is an integrally formed structure with the corresponding first support block 61 and second support block 62 respectively.

[0034] As mentioned above, the positioning mechanism 6 also includes a cover plate 7 that can be flipped in the longitudinal direction, and the two ends of the cover plate 7 are respectively connected to the two first support blocks 61. A hinge structure is installed on one of the first support blocks 61, and a positioning groove 64 is opened on the other first support block 61; and one end of the cover plate 7 is connected to the hinge structure, and the other end can be embedded in the positioning groove 64.

[0035] One end of the cover plate 7 is rotatably connected to one of the first support blocks 61 through a hinge structure, and the other end can be embedded in the positioning groove 64 to be locked when the cover plate 7 is parallel to the support plate 2, so as to facilitate the automatic screw locking machine to perform the screw locking work; the cover plate 7 is provided with through holes corresponding to the position and number of the fixture head 4, so as to facilitate the screws to pass through the cover plate 7 and the workpiece and screw together with the nut in sequence; and the cover plate 7 can also be pressed on the upper surface of the workpiece to ensure that the workpiece will not shake when the screw is locked, thereby improving the production quality.

[0036] Furthermore, a locking rod 65 for locking the cover plate 7 is disposed in the positioning groove 64 , and a limiting block 8 for limiting the flipping angle of the cover plate 7 is disposed on one side of the first supporting block 61 close to the hinge structure.

[0037] The hinge structure is installed on the top of the first support block 61, and the upper end of the limit block 8 protrudes from the corresponding first support block 61. This structure can ensure that the cover plate 7 will not flip over excessively when it is opened; and a lock hole is provided at one end of the cover plate 7 away from the hinge structure. When this end is embedded in the positioning groove 64, one end of the locking rod 65 can just be embedded in the lock hole, thereby completing the locking of the cover plate 7.

[0038] Working principle:

[0039] First, put the nut into the mounting hole 41 of the fixture head 4, place the workpiece to be locked on the positioning table 63, and close the cover plate 7; then the telescopic assembly 9 drives the floating plate 3 to move close to the support plate 2, driving the fixture head 4 to pass through the support plate 2, so that the nut in the mounting hole 41 is aligned with the hole position on the workpiece, and then the automatic screw locking machine is used to sequentially pass the screw through the cover plate 7 and the workpiece and then screw it into the threaded hole of the nut;

[0040] After the screw locking work is completed, the output end of the telescopic component 9 contracts to drive the floating plate 3 to move closer to the base plate 1, and then drives the fixture head 4 to move downward, so that one end of the push rod 5 fixed on the base plate 1 can push the nut out along the mounting hole 41, thereby solving the problem that the screw is stuck in the fixture head 4 and the workpiece cannot be removed normally, thereby improving the efficiency and quality of screw locking.

[0041] The above is based on the ideal embodiment of the utility model. Through the above description, relevant personnel can make various changes and modifications without deviating from the technical concept of the utility model. The technical scope of this utility model is not limited to the content in the specification, and the technical scope must be determined according to the scope of the claims.

Claims

1. A screw locking fixture, characterized in that: It comprises a base plate (1) and a support plate (2) which are arranged opposite to each other, wherein a positioning mechanism (6) for supporting a workpiece is arranged on one side of the support plate (2) opposite to the base plate (1), and a floating plate (3) which can move towards the base plate (1) is arranged on the other side; A jig head (4) is fixedly mounted on the floating plate (3), a mounting hole (41) for placing a nut is provided inside the jig head (4), and one end of the jig head (4) passes through the support plate (2) and extends to the bottom of the workpiece; The bottom plate (1) is provided with push rods (5) corresponding in number and position to the jig heads (4), and one end of the push rod (5) extends into the mounting hole (41).

2. The screw locking fixture according to claim 1, characterized in that: The bottom plate (1) and the support plate (2) are parallel to each other and are connected via a guide rod (10), and the guide rod (10) is passed through the floating plate (3).

3. The screw locking fixture according to claim 2, characterized in that: The guide rod (10) and the floating plate (3) are slidably connected via a linear bearing (11), and the linear bearing (11) is fixedly mounted on the floating plate (3).

4. The screw locking jig according to claim 3, characterized in that: A telescopic component (9) is mounted on the bottom plate (1), the output end of the telescopic component (9) is connected to the floating plate (3), and the output end of the telescopic component (9) is parallel to the guide rod (10).

5. The screw locking fixture according to claim 4, characterized in that: The positioning mechanism (6) comprises two first support blocks (61) arranged opposite to each other, second support blocks (62) being arranged on both sides of the first support block (61), and positioning platforms (63) for supporting a workpiece being arranged on the inner sides of the first support block (61) and the second support block (62).

6. The screw locking jig according to claim 5, characterized in that: The positioning mechanism (6) further comprises a cover plate (7) which can be flipped in the longitudinal direction, and two ends of the cover plate (7) are respectively connected to the two first support blocks (61).

7. The screw locking jig according to claim 6, characterized in that: A hinge structure is installed on one of the first support blocks (61), and a positioning groove (64) is provided on the other first support block (61); one end of the cover plate (7) is connected to the hinge structure, and the other end can be embedded in the positioning groove (64).

8. The screw locking jig according to claim 7, characterized in that: A locking rod (65) for locking the cover plate (7) is arranged in the positioning groove (64), and a limiting block (8) for limiting the flipping angle of the cover plate (7) is arranged on one side of the first supporting block (61) close to the hinge structure.

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