Centering positioning mechanism

Abstract

The utility model discloses a centering positioning mechanism which comprises positioning blocks arranged in pairs, the positioning blocks are arranged on a guide rail sliding block, and the guide rail sliding block is arranged on a linear guide rail. The positioning blocks are connected with a ball screw assembly, the ball screw assembly is provided with a ball screw, the ball screw is provided with a left-hand thread and a right-hand thread, and the ball screw rotates to drive the paired positioning blocks to move in the middle at the same time or move away from the middle in the reverse direction. According to the centering and positioning mechanism, the positioning blocks are arranged in pairs to clamp the steel backing, the ball screw is driven to rotate, the ball screw is provided with the left-hand thread and the right-hand thread, the two positioning blocks can be driven to move in a centering mode at the same time or move away from the middle in the reverse direction, clamping and positioning of the steel backing are achieved, the positioning precision is high, and the positioning speed is high; rigid positioning is achieved through the ball screw, and reliability is high.

Description

Technical Field

[0001] The utility model relates to a positioning mechanism, in particular to a centering positioning mechanism. Background Art

[0002] The steel back, as the key support of the brake pad, its main task is to stabilize the friction material so that it can be smoothly installed in the structure of the brake system. It is usually made of high-strength steel plates, with complex processes and strict requirements.

[0003] During the production of brake pads, it is necessary to quickly and accurately supply the steel back to the mold of the hot press to save the production cycle. Currently, for the positioning of the steel back feeding, many still use manual feeding, or use positioning pins or limit rods with guides, which cannot meet the production requirements of the automated production line to quickly position various models of steel backs accurately according to the position of the mold cavity of the hot press at the same time.

[0004] Therefore, it is necessary to solve the above technical problems. Summary of the Invention

[0005] The utility model aims at the above technical problems and provides a centering positioning mechanism, which can quickly and accurately position various models of steel backs according to the position relationship of the mold cavity when supplying the steel back to the hot press, so as to supply materials for the gripper to grab.

[0006] To achieve the above object, the technical solution of the utility model is:

[0007] A centering positioning mechanism includes a pair of positioning blocks arranged in pairs. The positioning blocks are arranged on a guide rail slider, and the guide rail slider is arranged on a linear guide rail; the positioning blocks are connected to a ball screw assembly. The ball screw assembly is provided with a ball screw, and the ball screw is respectively provided with a left-handed thread and a right-handed thread. When the ball screw rotates, it drives the paired positioning blocks to move towards the center simultaneously or move away from the middle in the opposite direction; the linear guide rail and the ball screw assembly are respectively arranged on a mounting base plate.

[0008] The centering positioning mechanism clamps the steel back by arranging a pair of positioning blocks. By driving the ball screw to rotate, since the ball screw is respectively provided with a left-handed thread and a right-handed thread, it can drive the two positioning blocks to move towards the center simultaneously or move away from the middle in the opposite direction, realizing the clamping and positioning of the steel back, with high positioning accuracy and fast speed; rigid positioning is achieved by the ball screw, and the reliability is high.

[0009] A further optimized scheme includes two pairs of positioning blocks arranged in parallel in the moving direction, namely the first pair of positioning blocks and the second pair of positioning blocks;

[0010] The first pair of positioning blocks includes a first end positioning block located at the end and a first middle positioning block located in the middle; the second pair of positioning blocks includes a second end positioning block located at the end and a second middle positioning block located in the middle;

[0011] The first end positioning block is rigidly connected to the second middle positioning block, and the second end positioning block is rigidly connected to the first middle positioning block.

[0012] The centering positioning mechanism is achieved by rigidly connecting the first end positioning block with the second middle positioning block, and the second end positioning block with the first middle positioning block, so as to realize the series connection of the first pair of positioning blocks and the second pair of positioning blocks. The two pairs of positioning blocks can move in linkage and clamp or release the positioning steel back at the same time. Only one driving device such as a motor is needed to realize the centering positioning of the steel backs of the two pairs of positioning blocks.

[0013] In a further optimized solution, a connecting rod is provided between the first end positioning block and the second middle positioning block, and between the second end positioning block and the first middle positioning block to rigidly connect. The connecting rod is used to realize the series connection between the two pairs of positioning blocks, and the structure is simple.

[0014] Further optimization scheme includes four pairs of positioning blocks, which are arranged vertically and horizontally in parallel. The four pairs of positioning blocks are linked to realize the clamping and positioning of the steel back, meeting the positioning of different types of steel backs.

[0015] A further optimized solution includes two pairs of positioning blocks arranged in parallel perpendicular to the moving direction, namely the fifth pair of positioning blocks and the sixth pair of positioning blocks;

[0016] The fifth pair of positioning blocks includes a fifth left positioning block and a fifth right positioning block, and the sixth pair of positioning blocks includes a sixth left positioning block and a sixth right positioning block;

[0017] The fifth left positioning block and the sixth left positioning block as well as the fifth right positioning block and the sixth right positioning block are connected as one body via connecting plates respectively.

[0018] The centering positioning mechanism sets two pairs of positioning blocks in parallel perpendicular to the moving direction, and connects the two parallel positioning blocks perpendicular to the moving direction through a connecting plate to achieve linkage action, while clamping and positioning the steel back to meet the positioning of the steel back of the appropriate model.

[0019] A further optimized solution further includes a servo motor, an active synchronous wheel, a driven synchronous wheel and a synchronous belt, wherein the servo motor is connected to the active synchronous wheel, the ball screw is connected to the driven synchronous wheel, and the synchronous belt is connected to the active synchronous wheel and the driven synchronous wheel. The servo motor precisely drives the ball screw to rotate to drive the positioning block to center and clamp the steel back, thereby achieving precise centering positioning of the steel back.

[0020] Further optimized solution: The ball screw assembly includes two screw nuts, and the screw nuts are respectively connected to the connecting plates. The movement of the positioning block on the linear guide is realized through the connection between the screw nut and the connecting plate.

[0021] Further optimized solution: It includes a first station and a second station arranged in parallel. The first station is provided with four pairs of positioning blocks, which are arranged horizontally side by side in two perpendicular pairs; the second station is provided with two pairs of positioning blocks, which are arranged side by side perpendicular to the moving direction.

[0022] The centering positioning mechanism of the double station is applied to the precise positioning before the steel back is grabbed and fed, and realizes the function of centering and positioning multiple specifications of steel backs to a specific position simultaneously during the production process of brake pads. At the same time, it can meet the selection of the corresponding positioning station according to whether the mold is a four-cavity small steel back or a two-cavity large steel back.

[0023] Further optimized solution: The first station and the second station are respectively provided with the ball screw assembly, and the two sets of ball screws are connected by a coupling. The ball screws of the two stations are connected by a coupling, and only one driving device such as a motor can be used to drive the ball screw to rotate to realize the centering and positioning of the steel backs of the two pairs of positioning blocks.

[0024] Further optimized solution: It includes a frame, a limit sensor and a dust cover. The mounting base plate is located on the frame. The limit sensor is arranged on the mounting base plate to sense the limit position of the positioning block, and the dust cover is arranged on the mounting base plate to cover the linear guide.

[0025] The utility model has the following technical advantages compared with the prior art:

[0026] 1. The centering positioning mechanism is driven by a servo motor to drive the screw to drive the positioning block to clamp and position the steel back. The positioning accuracy is high and the speed is fast. The ball screw realizes rigid positioning and has high reliability;

[0027] 2. The two sets of ball screw assemblies of the centering positioning mechanism are connected in series through a coupling. In addition, the positioning blocks of the four-cavity small steel back are also connected in series by a connecting plate. The whole mechanism only needs one motor to drive the two sets of ball screws to realize the centering and positioning of the steel back at the double station;

[0028] 3. The centering positioning mechanism has the ball screws connected in series and is driven by a single motor, with fast positioning speed and compact structure;

[0029] 4. The centering positioning mechanism can adopt a double-station structure and has high compatibility. Description of the Drawings

[0030] Figure 1 It is a three-dimensional view of a specific embodiment of a centering positioning mechanism of the utility model;

[0031] Figure 2 is Figure 1 the front view of;

[0032] Figure 3 is Figure 1 the top view of;

[0033] Figure 4 is Figure 1 the three - dimensional view of six pairs of positioning blocks in;

[0034] Figure 5 is Figure 4 the reverse three - dimensional view of;

[0035] Figure 6 is Figure 5 the front view of;

[0036] Figure 7 is Figure 6 the left view of;

[0037] Figure 8 is Figure 6 the top view of;

[0038] Figure 9 is Figure 4 the front view of.

[0039] In the figure: the first working station A, the second working station B, the first pair of positioning blocks 1, the first end positioning block 1a, the first middle positioning block 1b, the second pair of positioning blocks 2, the second end positioning block 2a, the second middle positioning block 2b, the third pair of positioning blocks 3, the third end positioning block 3a, the third middle positioning block 3b, the fourth pair of positioning blocks 4, the fourth end positioning block 4a, the fourth middle positioning block 4b, the fifth pair of positioning blocks 5, the fifth left positioning block 5a, the fifth right positioning block 5b, the sixth pair of positioning blocks 6, the sixth left positioning block 6a, the sixth right positioning block 6b, the guide rail slider 7, the linear guide rail 8, the ball screw assembly 9, the ball screw 9a, the screw nut 9b, the screw support seat 9c, the screw fixing seat 9d, the servo motor 10, the driving synchronous pulley 11, the driven synchronous pulley 12, the synchronous belt 13, the coupling 14, the frame 15, the mounting base plate 16, the limit sensor 17, the dust cover 18, the dust plate 19, the support feet 20, the connecting rod 21, the connecting plate 22. Specific embodiments

[0040] The following will further elaborate on the present utility model in conjunction with the embodiments in the drawings.

[0041] As Figures 1 to 9 shown, a specific embodiment of the centering positioning mechanism of the present utility model.

[0042] As Figures 1 to 4As shown in the figure, the centering and positioning mechanism of this embodiment includes a mounting base plate 16 fixed to the upper part of the frame 15. The first station A and the second station B are arranged in parallel on the mounting base plate 16.

[0043] As Figure 4 shown in the figure, a pair of positioning blocks are provided on each station. The positioning blocks are arranged on the guide rail slider 7, and the guide rail slider 7 is arranged on the linear guide rail 8; the positioning blocks are connected to the ball screw assembly 9. The ball screw assembly 9 is provided with a ball screw 9a. The ball screw 9a is respectively provided with a left-handed thread and a right-handed thread. When the ball screw 9a rotates, it drives the pair of positioning blocks to move towards the center simultaneously or move away from the middle in the opposite direction.

[0044] As Figure 4 and Figure 9 shown in the figure, the four linear guide rails 8 are sequentially fixed to the upper part of the mounting base plate 16. The two long linear guide rails 8 at both ends are used for the first station A and the second station B, and the two short linear guide rails 8 in the middle are only used for the first station A.

[0045] As Figures 5 to 8 shown in the figure, the ball screw assembly 9, the servo motor 10, the driving synchronous pulley 11, the driven synchronous pulley 12 and the synchronous belt 13 are fixed to the lower part of the mounting base plate 16. The servo motor 10 is connected to the driving synchronous pulley 11, the ball screw 9a is connected to the driven synchronous pulley 12, and the synchronous belt 13 is connected to the driving synchronous pulley 11 and the driven synchronous pulley 12. The servo motor accurately drives the ball screw to rotate to drive the positioning blocks to center and clamp the steel back, so as to realize the accurate centering and positioning of the steel back.

[0046] The centering and positioning mechanism is provided with a pair of positioning blocks to clamp the steel back. The servo motor drives the ball screw to rotate. Since the ball screw is respectively provided with a left-handed thread and a right-handed thread, it can drive the pair of positioning blocks to move towards the center simultaneously or move away from the middle in the opposite direction, so as to realize the clamping and positioning of the steel back, with high positioning accuracy and fast speed; the rigid positioning is realized by the ball screw, and the reliability is high.

[0047] As Figure 4 and Figure 9 shown in the figure, the first station A is provided with four pairs of positioning blocks, which are arranged horizontally side by side in two perpendicular directions, namely the first pair of positioning blocks 1, the second pair of positioning blocks 2, the third pair of positioning blocks 3, and the fourth pair of positioning blocks 4. The second station B is provided with two pairs of positioning blocks, which are arranged side by side perpendicular to the moving direction, namely the fifth pair of positioning blocks 5 and the sixth pair of positioning blocks 6.

[0048] As Figure 4 and Figure 9As shown, the first pair of positioning blocks 1 is provided with a first end positioning block 1a located at the end and a first middle positioning block 1b located in the middle; the second pair of positioning blocks 2 is provided with a second end positioning block 2a located at the end and a second middle positioning block 2b located in the middle. The first end positioning block 1a is rigidly connected to the second middle positioning block 2b by a connecting rod 21, and the second end positioning block 2a is rigidly connected to the first middle positioning block 1b by a connecting rod 21.

[0049] like Figure 4 and Figure 9 As shown, the third pair of positioning blocks 3 is provided with a third end positioning block 3a located at the end and a third middle positioning block 3b located in the middle; the fourth pair of positioning blocks 4 is provided with a fourth end positioning block 4a located at the end and a fourth middle positioning block 4b located in the middle. The third end positioning block 3a is rigidly connected to the fourth middle positioning block 4b by a connecting rod 21, and the fourth end positioning block 4a is rigidly connected to the third middle positioning block 3b by a connecting rod 21.

[0050] like Figure 4 and Figure 9 As shown, the first end positioning block 1a and the third end positioning block 3a as well as the first intermediate positioning block 1b and the third intermediate positioning block 3b are connected as a whole through a connecting plate 22; the second intermediate positioning block 2b and the fourth intermediate positioning block 4b as well as the second end positioning block 2a and the fourth end positioning block 4a are connected as a whole through a connecting plate 22.

[0051] like Figure 4 and Figure 9 As shown, the fifth pair of positioning blocks 5 is provided with a fifth left positioning block 5a and a fifth right positioning block 5b, and the sixth pair of positioning blocks 6 is provided with a sixth left positioning block 6a and a sixth right positioning block 6b; the fifth left positioning block 5a and the sixth left positioning block 6a as well as the fifth right positioning block 5b and the sixth right positioning block 6b are respectively connected as a whole through a connecting plate 22.

[0052] The centering positioning mechanism realizes corresponding series connection between six pairs of positioning blocks through rigid connection between corresponding positioning blocks, and can move in linkage, and clamp or release the positioning steel back at the same time. Only one servo motor is needed to realize the centering positioning of the six pairs of positioning blocks on the steel back.

[0053] The double-station centering positioning mechanism is used to accurately position the steel back before grabbing and feeding, and realizes the function of centering and positioning steel backs of various specifications to a specific position at the same time during the brake pad production process. At the same time, it can meet the needs of selecting the corresponding positioning station according to whether the mold is a four-cavity small steel back or a two-cavity large steel back.

[0054] like Figure 5 and Figure 6As shown, a ball screw assembly 9 is provided at each of the first station A and the second station B, and the two sets of ball screws 9a are connected by a coupling 14. One end of each set of ball screws 9a is connected and fixed through a screw support seat 9c, and the other end is connected and fixed through a screw fixing seat 9d. The ball screws at the two stations are connected by a coupling, and only one servo motor is needed to drive the ball screws to rotate, so as to realize the centering positioning of the positioning blocks on the two stations for the steel back.

[0055] As Figure 5 and Figure 6 shown, the two sets of ball screw assemblies 9 altogether include four screw nuts 9b, and the four screw nuts 9b are respectively connected to the connecting plates 22 at both ends of the two stations. The connection between the screw nut and the connecting plate realizes the movement of the positioning block on the linear guide.

[0056] As Figure 5 and Figure 6 shown, a limit sensor 17 is fixed under the mounting base plate 16 to sense the extreme position of the positioning block, so as to realize the precise positioning before the steel back is grasped and fed.

[0057] As Figure 1 , Figure 2 and Figure 3 shown, a dust cover 18 is arranged on the upper part of the mounting base plate 16 to cover the linear guide 8, and a dust-proof plate 19 is fixed on the lower part to prevent dust from entering the parts such as the servo motor 10 and the ball screw assembly 9 under the mounting base plate 16. Four support feet 20 are provided under the frame 15 to support the frame 15.

[0058] The centering positioning mechanism is driven by a servo motor to drive the screw to drive the positioning block to clamp and position the steel back. The positioning accuracy is high and the speed is fast. The ball screw realizes rigid positioning and has high reliability; the two sets of ball screw assemblies are connected in series through a coupling. In addition, the positioning blocks of the small steel backs with four cavities are also connected in series by the connecting plates. The whole mechanism only needs one servo motor to drive the two sets of ball screws to realize the centering positioning of the steel back at the two stations; the two sets of ball screws are connected in series and driven by a single motor, with fast positioning speed and compact structure; the double-station structure is adopted, with high compatibility, and can simultaneously meet the selection of the corresponding positioning station according to whether the mold is a four-cavity small steel back or a two-cavity large steel back.

[0059] To sum up, as described in the specification and the drawings of the present utility model, the actual sample is made and tested through multiple uses. From the test results, it is proved that the present utility model can achieve the expected purpose, and its practicability is beyond doubt. The above-mentioned embodiments are only used to conveniently illustrate the content of the present utility model, and are not intended to impose a formal limitation on it; any person with common general knowledge in the technical field can, without departing from the scope of the technical features and similar features proposed by the present utility model, make local changes or modified equivalent embodiments by using the technical content disclosed by the present utility model, and all belong to the protection scope of the present utility model.

Claims

1. A centering and positioning mechanism, characterized in that: It includes positioning blocks arranged in pairs, and the positioning blocks are arranged on a guide rail slider (7), and the guide rail slider (7) is arranged on a linear guide rail (8); the positioning blocks are connected to a ball screw assembly (9), the ball screw assembly (9) is provided with a ball screw (9a), the ball screw (9a) is respectively provided with a left-handed thread and a right-handed thread, and when the ball screw (9a) rotates, it drives the paired positioning blocks to move towards the center simultaneously or move away from the middle in the opposite direction; the linear guide rail (8) and the ball screw assembly (9) are respectively arranged on a mounting base plate (16).

2. The centering and positioning mechanism according to claim 1, wherein It includes two pairs of positioning blocks arranged side by side in the moving direction, namely the first pair of positioning blocks (1) and the second pair of positioning blocks (2); The first pair of positioning blocks (1) is provided with a first end positioning block (1a) at the end and a first middle positioning block (1b) in the middle; the second pair of positioning blocks (2) is provided with a second end positioning block (2a) at the end and a second middle positioning block (2b) in the middle; The first end positioning block (1a) is rigidly connected to the second middle positioning block (2b), and the second end positioning block (2a) is rigidly connected to the first middle positioning block (1b).

3. The centering and positioning mechanism according to claim 2, characterized in that There are connecting rods (21) respectively rigidly connecting the first end positioning block (1a) and the second middle positioning block (2b) and the second end positioning block (2a) and the first middle positioning block (1b).

4. The centering and positioning mechanism according to claim 1, characterized in that, It includes four pairs of positioning blocks, arranged horizontally side by side in two perpendicular pairs.

5. The centering and positioning mechanism according to claim 1, characterized in that, It includes two pairs of positioning blocks arranged side by side perpendicular to the moving direction, namely the fifth pair of positioning blocks (5) and the sixth pair of positioning blocks (6); The fifth pair of positioning blocks (5) is provided with a fifth left positioning block (5a) and a fifth right positioning block (5b), and the sixth pair of positioning blocks (6) is provided with a sixth left positioning block (6a) and a sixth right positioning block (6b); The fifth left positioning block (5a) and the sixth left positioning block (6a) and the fifth right positioning block (5b) and the sixth right positioning block (6b) are respectively connected into one body through a connecting plate (22).

6. The centering and positioning mechanism according to claim 1, characterized in that, It further includes a servo motor (10), a driving synchronous pulley (11), a driven synchronous pulley (12) and a synchronous belt (13), the servo motor (10) is connected to the driving synchronous pulley (11), the ball screw (9a) is connected to the driven synchronous pulley (12), and the synchronous belt (13) is connected to the driving synchronous pulley (11) and the driven synchronous pulley (12).

7. The centering and positioning mechanism according to claim 5, characterized in that, The ball screw assembly (9) includes two screw nuts (9b), and the screw nuts (9b) are respectively connected to the connecting plate (22).

8. The centering and positioning mechanism according to claim 1, characterized in that, It includes two first workstations (A) and second workstations (B) arranged side by side, the first workstation (A) is provided with four pairs of positioning blocks, arranged horizontally side by side in two perpendicular pairs; the second workstation (B) is provided with two pairs of positioning blocks, arranged side by side perpendicular to the moving direction.

9. The centering and positioning mechanism according to claim 8, characterized in that, The first workstation (A) and the second workstation (B) are respectively provided with the ball screw assembly (9), and the two groups of ball screws (9a) are connected through a coupling (14).

10. The centering and positioning mechanism according to claim 1, characterized in that, It includes a frame (15), a limit sensor (17) and a dust cover (18). The mounting base plate (16) is located on the frame (15). The limit sensor (17) is arranged on the mounting base plate (16) to sense the extreme position of the positioning block. The dust cover (18) is arranged on the mounting base plate (16) to cover the linear guide rail (8).

Images