Clamping mechanism for track

Abstract

The utility model discloses a clamping mechanism for a track, which relates to the technical field of track braking devices, and comprises a bearing seat, rollers matched with the track to slide are arranged at the bottom of the bearing seat, at least one braking unit is arranged on the bearing seat, the braking unit comprises a mounting plate, and a driving cylinder is arranged at one end of the mounting plate. A driving rack is arranged at the output end of the driving cylinder, a driving gear is meshed on the driving rack, a screw rod is arranged in an inner hole of the driving gear, a rotating seat is arranged at the other end of the screw rod, the rotating seat is fixed on the mounting plate, a nut seat is in threaded fit with the screw rod, a brake part is mounted on the nut seat, and a limiting frame is arranged on the mounting plate and located on the periphery of the brake part; the braking component is of an L-shaped structure and comprises a lifting part connected with the nut seat and a braking part perpendicularly arranged at one end of the lifting part, the braking component is driven by the driving rack and the driving gear to clamp the track, braking performance and stability are improved, and displacement of the mechanical arm on the track is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of track braking devices, in particular to a clamping mechanism for a track. Background Art

[0002] In a workshop production line, in order to improve production efficiency and the processing quality of products, a manipulator is introduced for cooperation. When the manipulator is working, in order to realize the conversion operation between multiple processes, the manipulator needs to be installed on a track, and the manipulator can be transferred between each working station on the track.

[0003] The track mainly consists of a rail head, a rail web, and a rail base.

[0004] The existing invention patent with the publication number CN 104772752 A and the publication date of July 15, 2015 discloses a robotic arm, including a support part; a connecting part, one end of which is arranged on the support part, and the connecting arm can slide along the support part; a gripper part, which is connected to the other end of the connecting part, and the gripper part can move under the drive of the connecting part and clamp an object. This robotic arm drives the swing of the connecting arm through a power device to reach a specified position for transferring an object, improving the degree of automation;

[0005] This robotic arm has the advantages of simple structure, low manufacturing cost, convenient maintenance, etc., is convenient for moving, installing and disassembling, has simple control, can greatly save workers, improve efficiency, and reduce production costs. However, the braking performance of this manipulator on the track during the working process is poor, and the braking is completely completed by the moving mechanism of the manipulator itself. If the braking performance on the track is poor, it will displace on the track under the load of the workpiece when grasping the workpiece and performing actions, which will further lead to a decrease or error in the accuracy of the performed actions.

[0006] Therefore, there is an urgent need for a clamping mechanism for a track to improve the braking performance of the manipulator on the track and avoid the occurrence of displacement of the manipulator. Summary of the Utility Model

[0007] In view of the above technical problems, the utility model provides a clamping mechanism for a track to solve the problem that the existing manipulator has poor braking performance on the track, which further leads to displacement during the execution of actions.

[0008] The above technical object of the utility model is achieved through the following technical solutions:

[0009] A clamping mechanism for a track, comprising a bearing seat. A roller for sliding in cooperation with the track is provided at the bottom of the bearing seat. At least one braking unit is provided on the bearing seat. The braking unit includes a mounting plate. A driving cylinder is provided at one end of the mounting plate. A driving rack is provided at the output end of the driving cylinder. A driving gear is meshed with the driving rack. A lead screw is tightly fitted in the inner hole of the driving gear by key connection. A rotating seat is provided at the other end of the lead screw. The rotating seat is fixed on the mounting plate. A nut seat is in threaded cooperation with the lead screw. A braking member is mounted on the nut seat. A limiting frame is provided around the braking member on the mounting plate;

[0010] The braking member has an L-shaped structure and includes a lifting portion connected to the nut seat and a braking portion vertically provided at one end of the lifting portion.

[0011] Further, the braking members are symmetrically arranged at both ends of the nut seat, and the distance between the two braking portions is greater than the thickness of the web of the rail.

[0012] Further, the braking member is detachably connected to the nut seat.

[0013] Further, a fitting surface is provided on the side of the braking portion close to the rail head.

[0014] Further, a mounting frame is provided on the back of the mounting plate where the driving rack is located. A guide wheel is provided on the mounting frame and acts on the side wall of the driving rack.

[0015] Further, the limiting frame is composed of three detachably connected plate members.

[0016] Further, four braking units are provided and arranged at the four corners of the bearing seat.

[0017] Further, the braking unit further includes a casing connected to the mounting plate.

[0018] Further, a self-lubricating copper plate is provided between the lifting portion and the limiting frame.

[0019] In summary, the beneficial technical effects of the present utility model are as follows:

[0020] (1) The driving cylinder is used to drive the driving rack to make a reciprocating linear motion. The driving rack further drives the driving gear to rotate the lead screw forward and backward. The lead screw further drives the nut seat connected with the braking member to move up and down. When the braking member moves upward, the braking portion is used to buckle under the rail head to achieve braking. When the braking member moves downward, the braking is released. Thereby, the braking performance of the entire manipulator on the track and the stability during the execution of actions are improved, and displacement is avoided.

[0021] (2) By arranging four braking units on the bearing seat, the stress points with the track are increased, further improving the braking performance and stability.

[0022] (3) The limiting frame can provide a guiding function for the up and down movement of the braking part, and at the same time prevent the outward dispersion of the braking part when it is stressed, ensuring the acting force on the track. Brief Description of the Drawings

[0023] Figure 1 is a schematic diagram of the overall structure of the present utility model;

[0024] Figure 2 is Figure 1 a schematic diagram of the structure from another angle;

[0025] Figure 3 is a schematic diagram of the structure of the braking unit;

[0026] Figure 4 is a schematic diagram of the internal structure of the braking unit;

[0027] Figure 5 is Figure 4 a schematic diagram of another angle;

[0028] Figure 6 is Figure 4 a schematic diagram with the limiting frame hidden;

[0029] Figure 7 is a schematic diagram of the cooperation between the braking unit and the track.

[0030] Reference Signs: 1, bearing seat; 2, roller; 3, braking unit; 4, mounting plate; 5, driving cylinder; 6, driving rack; 7, driving gear; 8, lead screw; 9, rotating seat; 10, nut seat; 11, braking part; 12, limiting frame; 13, lifting part; 14, braking part; 15, fitting surface; 16, guide wheel; 17, self-lubricating copper plate; 18, housing; 19, track; 20, rail head; 21, rail waist. Detailed Embodiment

[0031] The present utility model will be clearly and completely described below in conjunction with the embodiments.

[0032] It should be noted that all directional indications (such as up, down, left, right, front, back...) in the embodiments of the present utility model are only used to explain the relative positional relationship and movement conditions between components in a specific posture (as shown in the drawings). If the specific posture changes, the directional indications will also change accordingly.

[0033] In the description of the embodiments, unless otherwise clearly defined and limited, terms such as "arrangement" and "connection" shall be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected, or connected through an intermediate medium, or there can be a connection inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0034] See the appendix Figures 1-6 , which shows a clamping mechanism for a track, including a bearing seat 1 for installing a manipulator. A plurality of rollers 2 are installed at the bottom of the bearing seat 1, and the rollers 2 are respectively arranged on the top and both sides of the rail head 20 to assist the bearing seat 1 in sliding on the track 19;

[0035] At each of the four corners of the bearing seat 1 located at the position of the track 19, a braking unit 3 is provided. By arranging the braking units 3 at the four corners of the bearing seat 1, the magnitude of the braking force of the bearing seat 1 on the track 19 can be balanced, making the bearing seat 1 more stable;

[0036] Specifically, the braking unit 3 includes a mounting plate 4 connected to the bearing seat 1. A driving cylinder 5 is horizontally installed at one end of the mounting plate 4. The driving cylinder 5 is specifically a double-rod cylinder. The output end of the driving cylinder 5 is installed with a driving rack 6 through bolts. A driving gear 7 is engaged with the driving rack 6, and a lead screw 8 is provided at the center position of the driving gear 7. When the driving cylinder 5 drives the driving rack 6 to act on the driving gear 7 to rotate, the lead screw 8 rotates synchronously with the driving gear 7. At the same time, a rotating seat 9 is provided at the other end of the lead screw 8 on the mounting plate 4. The lead screw 8 is rotatably connected along the rotating seat 9. At the same time, a nut seat 10 is threadedly engaged with the lead screw 8. By rotating the lead screw 8 forward and backward, the nut seat 10 moves up and down, and two braking members 11 are respectively hinged at both ends of the nut seat 10;

[0037] The braking member 11 is integrally L-shaped and includes a lifting part 13 hinged to the nut seat 10 and a braking part 14 provided at one end of the lifting part 13. The distance between the two braking parts 14 is greater than the thickness of the web 21. During use, the two braking members 11 are symmetrically located on both sides of the web 21. By driving the cylinder 5 to drive the lead screw 8 to rotate, the lead screw 8 further drives the two braking members 11 to move upward through the nut seat 10. At this time, the two braking parts 14 just fit and act on the lower side of the rail head 20 to achieve braking;

[0038] At the same time, in order to prevent the braking member 11 from rotating and separating along the nut seat 10 to both sides of the web 21 when the braking member 11 acts on the track 19, a detachable limiting frame 12 is provided outside the two braking members 11 on the mounting plate 4. When the braking member 11 moves up and down, it can be guided by the limiting frame 12;

[0039] It can be seen from this that when the manipulator is working, in order to improve the accuracy of the executed actions and avoid displacement during work, when braking, the driving cylinder 5 relies on the cooperation of the driving rack 6 and the driving gear 7, and the lead screw 8 drives the braking member 11 to complete the braking with the track 19, improving the braking performance of the bearing seat 1 on the track 19 and the stability of the manipulator during work.

[0040] In addition, a self-lubricating copper plate 17 is installed on one side of the lifting part 13 close to the limit frame 12 through bolts. Through the self-lubricating copper plate 17, the moving gap between the lifting part 13 and the limit frame 12 can be further reduced, ensuring the acting force of the braking member 11 on the track 19. At the same time, through the self-lubricating copper plate 17, when the braking member reciprocates along the limit frame, the wear between the lifting part and the main structure of the limit frame can be reduced;

[0041] At the same time, a fitting surface 15 is provided on one side of the braking part 14 close to the rail head 20. Through this fitting surface 15, the contact area between the braking part 14 and the rail head 20 is increased, making the braking effect more sufficient;

[0042] Furthermore, in order to improve the stability of the action of the driving rack 6 on the driving gear 7, the mounting plate 4 is located on the back of the driving rack 6 and a guide wheel 16 is provided through a mounting bracket. The guide wheel 16 provides support and guidance for the driving rack 6 during linear movement;

[0043] Furthermore, in order to prevent sundries from entering between the driving rack 6 and the driving gear 7 during work, a casing 18 for protection is provided on the mounting plate 4.

[0044] During use, refer to the appendix Figure 7 , as shown, place the entire bearing seat 1 on two tracks 19, and make the two braking members 11 symmetrically located on both sides of the track 19. When the manipulator needs to brake, the driving cylinder 5 drives the driving rack 6 to extend horizontally. The driving rack 6 further meshes with the driving gear 7 to rotate. The driving gear 7 simultaneously drives the lead screw 8 to rotate. The lead screw 8 acts on the nut seat 10 to drive the two braking members 11 to lift upward along the limit frame 12. At this time, the fitting surface 15 on the braking member 11 just fits against the lower side of the rail head 20, and a mutual reaction force occurs with the rail head 20 to achieve braking.

[0045] The above is only the preferred specific implementation manner of the present invention, and does not limit the protection scope of the present invention accordingly. Therefore: All equivalent changes made according to the structure, shape, and principle of the present invention should be covered within the protection scope of the present invention.

Claims

1. A clamping mechanism for a track, comprising a bearing seat (1), wherein the bottom of the bearing seat (1) is provided with a roller (2) that slides with the track (19), characterized in that: At least one brake unit (3) is provided on the bearing seat (1), and the brake unit (3) comprises a mounting plate (4), one end of the mounting plate (4) is provided with a drive cylinder (5), the output end of the drive cylinder (5) is provided with a drive rack (6), the drive rack (6) is meshed with a drive gear (7), a screw rod (8) is tightly fitted in the inner hole of the drive gear (7) through a key connection, the other end of the screw rod (8) is provided with a rotating seat (9), the rotating seat (9) is fixed on the mounting plate (4), a nut seat (10) is threadedly fitted on the screw rod (8), a brake member (11) is installed on the nut seat (10), and a limit frame (12) is provided on the mounting plate (4) at the periphery of the brake member (11); The brake component (11) is in an L-shaped structure and comprises a lifting portion (13) connected to the nut seat (10) and a brake portion (14) vertically arranged at one end of the lifting portion (13).

2. A clamping mechanism for a rail according to claim 1, characterized in that: The braking parts (11) are symmetrically arranged at two ends of the nut seat (10), and the distance between the two braking parts (14) is greater than the thickness of the rail waist (21).

3. A clamping mechanism for a rail according to claim 1, characterized in that: The braking member (11) and the nut seat (10) are detachably connected.

4. A clamping mechanism for a rail according to claim 1, characterized in that: A fitting surface (15) is provided on one side of the braking portion (14) close to the rail head (20).

5. The clamping mechanism for rails according to claim 1, characterized in that: The mounting plate (4) is provided with a mounting frame on the back side of the driving rack (6), and the mounting frame is provided with a guide wheel (16), and the guide wheel (16) acts on the side wall of the driving rack (6).

6. A clamping mechanism for rails according to claim 1, characterized in that: The limiting frame (12) is composed of three detachably connected plates.

7. A clamping mechanism for rails according to claim 1, characterized in that: The brake units (3) are provided in four numbers and are arranged at the four corners of the bearing seat (1).

8. The clamping mechanism for rails according to claim 1, characterized in that: The brake unit (3) also includes a housing (18) connected to the mounting plate (4).

9. A clamping mechanism for rails according to claim 1, characterized in that: A self-lubricating copper plate (17) is provided between the lifting portion (13) and the limiting frame (12).

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