Tensioning mechanism for automatically adjusting chain type tool magazine

Abstract

The utility model discloses a tensioning mechanism for automatically adjusting a chain type tool magazine. Comprising a base, an arc-shaped plate is fixedly connected to one end of the base, a chain wheel is arranged at the other end of the base, a diffuse reflection sensor is arranged on the arc-shaped plate, and rails are arranged on the side faces of the base and the arc-shaped plate. And the spring pushes the flange to move towards the lower part of the chain wheel, so that the tensioning of the whole chain link plate group is adjusted. And after the adjustment is completed, the spring tensioning screw is locked by using a nut. Tensioning can be automatically adjusted, and tool magazine chain plate loosening caused by abrasion can be completely eradicated before a spring loses efficacy. And the problem that the tool magazine chain plate is abraded quickly due to too large tensioning force is effectively solved. During transmission, vibration of the tool magazine is reduced, force transmitted to the chain plate during tool changing is effectively buffered, and the problem that the tensioning force of the chain plate is too large due to tool changing force is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of machine tools, in particular to a tensioning mechanism for automatic adjustment of a chain-type tool magazine. Background Technique

[0002] The chain-type tool magazine is a common form of tool magazine in numerical control machine tools, especially more common in large-scale machining equipment. It has a large tool capacity, can store more tools, thus reducing the frequency and time of tool change and improving the machining efficiency.

[0003] The tools of the chain-type tool magazine are usually placed on a closed chain, and the movement of the chain is driven by a servo motor. The tool is sent to the position of the spindle taper hole through a transmission device. During tool selection, the control system will select the corresponding tool according to the need and control the movement of the chain to send the tool to the position of the spindle taper hole. At the same time, the tool return device will send the used tool back to the chain-type tool magazine for the next use.

[0004] The advantages of the chain-type tool magazine are its large tool capacity, fast tool selection speed, and ability to meet the needs of large-scale machining equipment. However, the chain-type tool magazine also has some disadvantages. After slight wear of the chain plates of the existing chain-type tool magazine, only the chain plates can be replaced or the tension force of the chain plates can be readjusted, resulting in a large operating cost of the machining center. Content of the Utility Model

[0005] (1) Technical Problems to be Solved

[0006] Aiming at the deficiencies of the existing technology, the utility model provides a tensioning mechanism for automatic adjustment of a chain-type tool magazine, which has the advantages of being able to automatically adjust the tension and preventing the loosening of the tool magazine chain plates caused by wear before the spring fails.

[0007] (2) Technical Solutions

[0008] To achieve the above object, the utility model provides the following technical solution: A tensioning mechanism for automatic adjustment of a chain-type tool magazine includes a base, one end of the base is fixedly connected with an arc-shaped plate, a sprocket is arranged at the other end of the base, a diffuse reflection sensor is arranged on the arc-shaped plate, tracks are arranged on the side surfaces of the base and the arc-shaped plate, a tool claw is arranged in the track, and a tool is arranged in the tool claw;

[0009] A motor is arranged below the sprocket, a speed reducer is arranged between the motor and the sprocket, a flange is arranged on one side of the speed reducer, a pressing plate is arranged at the bottom of the flange, a spring is fixedly connected to one end of the flange, a spring tensioning block is fixedly connected to the end of the spring, a fixing block is arranged outside the spring tensioning block, a spring installation screw is inserted into the spring, and a spring tensioning screw is threadedly connected in the fixing block.

[0010] Preferably, the base is of a rectangular structure, and the diameter of the arc-shaped plate is the same as the length of the short side of the base.

[0011] Preferably, the arc-shaped plate is fixedly connected to the end of the base by bolts, and a rotating groove is provided at one end of the base where the sprocket is arranged.

[0012] With the above technical solution: The base provides a support and installation platform for other structures, and the arc-shaped plate arranged at one end thereof cooperates with the base to provide an installation platform for the track, so that the end of the track forms an arc-shaped structure, facilitating the cyclic movement of the tool claws on the track. The diameter of the arc-shaped plate is the same as the length of the short side of the base, enabling the track to be perfectly connected between the two, ensuring the smoothness during the rotation of the tool magazine. A rotating groove is provided at the other end of the base to provide a rotating space for the sprocket, enabling the sprocket to drive the tool claws to move cyclically within the track.

[0013] Preferably, the sprocket is provided with meshing grooves, and the track includes a vertical track groove and a horizontal track groove.

[0014] Preferably, there are several tool claws which are evenly arranged within the track, and several said tool claws are connected together by a link group.

[0015] With the above technical solution: The base and other parts construct a track like a circular runway, enabling the link group to rotate forward or backward inside the circular track. Moreover, the annular groove is divided into a vertical track groove and a horizontal track groove, respectively restricting the positions of the link group in the up-down direction and left-right in the horizontal plane, and then a spring at the sprocket exerts a force on the flange of the sprocket group to tension the entire link group.

[0016] Preferably, the motor is a servo motor, and the speed reducer is a planetary speed reducer.

[0017] Preferably, a slot is provided at one end of the flange, and the spring mounting screw is threadedly connected in the slot.

[0018] Preferably, the spring tensioning block is sleeved on the spring mounting screw, and the fixing block is fixedly connected to the base.

[0019] With the above technical solution: The motor drives the sprocket to rotate through the speed reducer. The speed reducer adopts a precise planetary speed reducer, which can reduce the speed of the motor and increase the output torque at the same time. The flange is used to fix the parts and enable the sprocket group to slide back and forth within the track, reducing the influence of the polygon effect during the sprocket chain drive. By loosening or tightening the spring tensioning screw, the position of the spring tensioning block is adjusted, thereby compressing the spring, and then the spring pushes the flange to move downward relative to the sprocket, so as to adjust the tension of the entire link plate group. After the adjustment is completed, the spring tensioning screw is locked with a nut.

[0020] (III) Beneficial effects

[0021] Compared with the prior art, the utility model provides a tensioning mechanism for automatically adjusting a chain tool magazine, which has the following beneficial effects:

[0022] The tensioning mechanism of the chain tool magazine automatically adjusts by setting structures such as flanges, springs, spring tensioning blocks, fixing blocks, spring mounting screws, and spring tensioning screws. The position of the spring tensioning block is adjusted by loosening or locking the spring tensioning screws, thereby compressing the spring, and then the spring pushes the flange to move below the sprocket, so that the tension of the entire chain link plate group can be adjusted. After the adjustment is completed, the spring tensioning screw is locked with a nut. The tension can be automatically adjusted, and the loosening of the tool magazine chain plate caused by wear can be prevented before the spring fails. The noise caused by excessive tensioning force can be effectively reduced, and the problem of rapid wear of the tool magazine chain plate caused by excessive tensioning force can be effectively reduced. During transmission, the vibration of the tool magazine is reduced, and the force transmitted to the chain plate during tool change is effectively buffered, solving the problem of excessive tensioning force on the chain plate caused by tool change force. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is a schematic diagram of the overall structure of a tensioning mechanism for automatically adjusting a chain tool magazine proposed by the utility model;

[0024] Figure 2 A schematic diagram of the structure of the sprocket position of the tensioning mechanism of the chain tool magazine that is automatically adjusted according to the utility model;

[0025] Figure 3 It is a schematic structural diagram of a first-view cutaway view of the flange position of a tensioning mechanism for automatically adjusting a chain tool magazine proposed by the utility model;

[0026] Figure 4 A schematic cross-sectional structure diagram of the flange position of a tensioning mechanism for automatically adjusting a chain tool magazine proposed by the utility model from a second viewing angle;

[0027] Figure 5 The utility model provides a structural schematic diagram of the arc plate position of the tensioning mechanism of the chain tool magazine that automatically adjusts.

[0028] In the figure: 1-base, 2-arc plate, 3-sprocket, 31-meshing groove, 4-diffuse reflection sensor, 5-track, 51-vertical track groove, 52-horizontal track groove, 6-claw, 7-tool, 8-motor, 9-reducer, 10-flange, 11-pressure plate, 12-spring, 13-spring tensioning block, 14-fixing block, 15-spring mounting screw, 16-spring tensioning screw. DETAILED DESCRIPTION

[0029] The technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0030] Please refer to Figures 1-5 , a tensioning mechanism for automatic adjustment of a chain-type tool magazine, including a base 1, one end of the base 1 is fixedly connected with an arc-shaped plate 2, a sprocket 3 is arranged at the other end of the base 1, a diffuse reflection sensor 4 is arranged on the arc-shaped plate 2, tracks 5 are arranged on the side surfaces of the base 1 and the arc-shaped plate 2, a tool claw 6 is arranged in the track 5, and a tool 7 is arranged in the tool claw 6;

[0031] A motor 8 is arranged below the sprocket 3, a speed reducer 9 is arranged between the motor 8 and the sprocket 3, a flange 10 is arranged on one side of the speed reducer 9, a pressing plate 11 is arranged at the bottom of the flange 10, a spring 12 is fixedly connected to one end of the flange 10, a spring tensioning block 13 is fixedly connected to the end of the spring 12, a fixing block 14 is arranged outside the spring tensioning block 13, a spring installation screw 15 is inserted into the spring 12, and a spring tensioning screw 16 is threadedly connected in the fixing block 14.

[0032] Embodiment 1: The base 1 adopts a rectangular structure, and the diameter of the arc-shaped plate 2 is the same as the side length of the short side of the base 1. The arc-shaped plate 2 is fixedly connected to the end of the base 1 by bolts, and a rotating groove is opened at one end of the base 1 where the sprocket 3 is arranged. The base 1 provides support and an installation platform for other structures, and the arc-shaped plate 2 arranged at one end thereof cooperates with the base 1 to provide an installation platform for the track 5, so that the end of the track 5 forms an arc-shaped structure, facilitating the cyclic movement of the tool claw 6 on the track 5. The diameter of the arc-shaped plate 2 is the same as the side length of the short side of the base 1, enabling the track 5 to be perfectly connected between the two, ensuring the smoothness when the tool magazine rotates. A rotating groove is opened at the other end of the base 1 to provide a rotating space for the sprocket 3, enabling the sprocket 3 to drive the tool claw 6 to cyclically move in the track 5.

[0033] Embodiment 2: The sprocket 3 is provided with a meshing groove 31, and the track 5 includes a vertical track groove 51 and a horizontal track groove 52. There are several tool claws 6 which are evenly arranged in the track 5, and several tool claws 6 are connected together by a chain link group. The base 1 and other parts construct a track 5 like a circular runway, enabling the chain link group to rotate forward or backward inside the circular track 5. And, the annular groove is divided into a vertical track groove 51 and a horizontal track groove 52, which respectively limit the positions of the chain link group in the up-down direction and left-right in the horizontal plane, and then a spring at the sprocket 3 applies a force to the flange of the sprocket group to tension the entire chain link group.

[0034] Embodiment 3: The motor 8 is a servo motor, and the speed reducer 9 is a planetary speed reducer. One end of the flange 10 is provided with a slot, and the spring mounting screw 15 is threadedly connected in the slot. The spring tensioning block 13 is sleeved on the spring mounting screw 15, and the fixing block 14 is fixedly connected to the base 1. The motor 8 drives the sprocket 3 to rotate through the speed reducer 9. The speed reducer 9 is a precise planetary speed reducer, which can reduce the speed of the motor and increase the output torque at the same time. The flange 10 is used to fix the parts and enable the sprocket set to slide back and forth in the track 5, reducing the influence of the polygon effect during the sprocket chain drive. By loosening or tightening the spring tensioning screw 16, the position of the spring tensioning block 13 is adjusted, thereby compressing the spring 12, and then the spring 12 pushes the flange 10 to move downward below the sprocket 3, so as to adjust the tension of the entire link plate group. After the adjustment is completed, use a nut to lock the spring tensioning screw 16.

[0035] During use, start the motor 8. The motor 8 drives the sprocket 3 to rotate through the speed reducer 9, and the sprocket 3 drives the cutter claws 6 to move cyclically in the track 5. By loosening or tightening the spring tensioning screw 16, the position of the spring tensioning block 13 is adjusted, thereby compressing the spring 12, and then the spring 12 pushes the flange 10 to move downward below the sprocket 3, so as to adjust the tension of the entire link plate group. After the adjustment is completed, use a nut to lock the spring tensioning screw 16.

[0036] In summary, for the automatic tensioning mechanism of this chain-type tool magazine, by setting structures such as the flange 10, spring 12, spring tensioning block 13, fixing block 14, spring mounting screw 15, and spring tensioning screw 16, the position of the spring tensioning block 13 is adjusted by loosening or tightening the spring tensioning screw 16, thereby compressing the spring 12, and then the spring 12 pushes the flange 10 to move downward below the sprocket 3, so as to adjust the tension of the entire link plate group. After the adjustment is completed, use a nut to lock the spring tensioning screw 16. It can automatically adjust the tension, and before the spring 12 fails, it can prevent the tool magazine chain plate from loosening due to wear. It effectively reduces the noise caused by excessive tension, and effectively reduces the problem of rapid wear of the tool magazine chain plate caused by excessive tension. During transmission, it reduces the vibration of the tool magazine, effectively buffers the force transmitted to the chain plate during tool change, and solves the problem of excessive tension of the chain plate caused by the tool change force.

[0037] It should be noted that in this text, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprising", "including" or any other variant thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements not only includes those elements, but also includes other elements not expressly listed, or also includes elements inherent to such process, method, article or device. Without further limitation, an element defined by the statement "comprising one" does not exclude the presence of additional identical elements in the process, method, article or device comprising said element.

[0038] Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A tensioning mechanism for automatically adjusting a chain tool magazine, characterized in that: The invention comprises a base (1), one end of the base (1) is fixedly connected to an arc-shaped plate (2), the other end of the base (1) is provided with a sprocket (3), the arc-shaped plate (2) is provided with a diffuse reflection sensor (4), the side surfaces of the base (1) and the arc-shaped plate (2) are both provided with tracks (5), a knife claw (6) is provided in the track (5), and a knife claw (6) is provided in the knife claw (6); A motor (8) is arranged below the sprocket (3), a reducer (9) is arranged between the motor (8) and the sprocket (3), a flange (10) is arranged on one side of the reducer (9), a pressure plate (11) is arranged at the bottom of the flange (10), a spring (12) is fixedly connected to one end of the flange (10), a spring tensioning block (13) is fixedly connected to the end of the spring (12), a fixing block (14) is arranged on the outer side of the spring tensioning block (13), a spring mounting screw (15) is inserted into the spring (12), and a spring tensioning screw (16) is threadedly connected to the fixing block (14).

2. The tensioning mechanism of the chain tool magazine with automatic adjustment according to claim 1 is characterized in that: The base (1) adopts a rectangular structure, and the diameter of the arc-shaped plate (2) is the same as the length of the short side of the base (1).

3. The tensioning mechanism of the chain tool magazine with automatic adjustment according to claim 2 is characterized in that: The arc-shaped plate (2) is fixedly connected to the end of the base (1) by means of bolts, and one end of the base (1) provided with a sprocket (3) is provided with a rotation groove.

4. The tensioning mechanism for automatically adjusting the chain tool magazine according to claim 3 is characterized in that: The sprocket (3) is provided with an engagement groove (31), and the track (5) comprises a vertical track groove (51) and a horizontal track groove (52).

5. The tensioning mechanism for automatically adjusting the chain tool magazine according to claim 4 is characterized in that: There are a plurality of knife claws (6) which are evenly arranged in the track (5), and the plurality of knife claws (6) are connected together through a chain link group.

6. The tensioning mechanism for automatically adjusting the chain tool magazine according to claim 5, characterized in that: The motor (8) is a servo motor, and the reducer (9) is a planetary reducer.

7. The tensioning mechanism of the chain tool magazine with automatic adjustment according to claim 6, characterized in that: A slot is formed at one end of the flange (10), and the spring mounting screw (15) is threadedly connected in the slot.

8. The tensioning mechanism of the chain tool magazine with automatic adjustment according to claim 7, characterized in that: The spring tensioning block (13) is sleeved on the spring mounting screw (15), and the fixing block (14) is fixedly connected to the base (1).

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