Encoder distance and speed measuring device and conveying equipment

Abstract

The utility model discloses an encoder distance measuring and speed measuring device and transmission equipment, the encoder distance measuring and speed measuring device comprises an encoder and a detection seat, the detection seat is rotatably connected with at least two pressing wheels, the pressing wheels are used for abutting against a chain block, a synchronizing mechanism is connected among all the pressing wheels, and all the pressing wheels realize synchronous rotation through the synchronizing mechanism. A detection shaft of the encoder is in transmission connection with the pressing wheel. According to the scheme, at least two pressing wheels are arranged, so that when a certain pressing wheel passes through the gap between the two chain blocks and jumps, the pressing wheel is still kept to be pressed on the side faces of the chain blocks; besides, a synchronizing mechanism is connected among all the pressing wheels, so that all the pressing wheels can rotate synchronously, the jumping pressing wheels are driven by the pressing wheels pressed on the chain block, the encoder still keeps detecting the moving distance of the chain block, the jumping pressing wheels do not influence detection of the encoder or influence is small when the chain block passes through the gap, detection errors can be reduced, and the detection accuracy is improved. The detection precision is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of encoder ranging and speed measuring, in particular to an encoder ranging and speed measuring device and a conveying device. Background Art

[0002] The chain plate conveyor belt is a commonly used conveying mechanism, and the chain plate conveyor belt includes a plurality of connected chain blocks. At present, in order to measure the conveying distance and speed of the conveyor belt, a ranging device of an encoder and a pressure wheel is used for detection. The encoder is connected to the pressure wheel, and the pressure wheel presses on the side surface of the chain block and rotates as the chain block moves. The encoder calculates the conveying distance and speed by detecting the rotation angle of the pressure wheel.

[0003] However, since there is a gap between two adjacent chain blocks, that is, there is a gap between the side surfaces of the two chain blocks, when the pressure wheel passes through the gap from the side, it will fall into the gap and generate a jump, resulting in the detection data of the encoder not actually detecting the moving distance of the chain block, thus generating a detection error and reducing the detection accuracy. Although the data at the jump position can be processed through a software algorithm, the detection accuracy is still relatively low. Especially after passing through multiple gap positions, a large amount of errors will accumulate, affecting the detection of the position of the conveyed workpiece and the processing accuracy. Summary of the Utility Model

[0004] The main object of the utility model is to propose an encoder ranging and speed measuring device and a conveying device, aiming to solve the technical problem that when the pressure wheel passes through the gap between two chain blocks in the prior art, it will jump and generate a detection error.

[0005] To achieve the above object, the utility model proposes an encoder ranging and speed measuring device, which includes an encoder and a detection seat. At least two pressure wheels are rotatably connected to the detection seat. The pressure wheels are used to press on the chain blocks. A synchronization mechanism is connected between all the pressure wheels. All the pressure wheels are synchronously rotated through the synchronization mechanism. The detection shaft of the encoder is in transmission connection with the pressure wheels.

[0006] In this solution, at least two pressure wheels are provided, and the center distance between the pressure wheels is matched according to the length of the chain block, so that at least one pressure wheel can be kept pressing on the side surface of the chain block during detection. When a certain pressure wheel jumps due to passing through the gap between two chain blocks, there is still a pressure wheel pressing on the side surface of the chain block. In addition, a synchronization mechanism is connected between all the pressure wheels, so that all the pressure wheels can rotate synchronously. Moreover, due to the large friction force of the pressure wheel pressing on the chain block, the jumping pressure wheel is driven by the pressure wheel pressing on the chain block. Therefore, the encoder still keeps detecting the moving distance of the chain block, and the jumping pressure wheel passing through the gap has little or no influence on the detection of the encoder, thereby reducing the detection error and improving the detection accuracy.

[0007] Preferably, the synchronization mechanism includes a rotating gear and a synchronization gear. The rotating gear is coaxially fixed on the pressure wheel. The synchronization gear is rotationally connected to the detection base. The synchronization gear is meshed with each other between two adjacent rotating gears to achieve synchronous rotation.

[0008] A rotating gear is coaxially fixed on the pressing wheel, and two adjacent rotating gears are meshed and connected by synchronous gears to achieve synchronous rotation of the pressing wheel.

[0009] Preferably, the encoder distance and speed measuring device further comprises a mounting seat, the detection seat is rotatably connected to the mounting seat, and the mounting seat is used to press the detection seat toward the chain block.

[0010] The mounting seat presses the detection seat and the pressure wheel toward the chain block. The detection seat can rotate relative to the mounting seat, so that the pressure wheel can adapt to fit and press on the side of the chain block, thereby improving the detection accuracy.

[0011] Preferably, there are two pressure wheels, the rotation axes of the mounting seat and the detection seat are coaxially arranged with the axis of the synchronous gear, the encoder is fixedly connected to the mounting seat, and the detection shaft of the encoder is transmission-connected to the synchronous gear.

[0012] The two pressure wheels are respectively on both sides of the rotation axis of the mounting base and the detection base. The mounting base presses the pressure wheels toward the chain block from the position between the two pressure wheels. The detection base can rotate to adapt to the position of the two pressure wheels fitting the chain block, and the axis position of the synchronous gear and the encoder remains unchanged, making the structure simpler and more compact.

[0013] Preferably, the detection shaft of the encoder is fixed coaxially with the synchronous gear, resulting in a simpler structure.

[0014] Preferably, the detection seat includes an upper plate and a lower plate spaced apart from each other, the pressure wheel is arranged on the upper side of the upper plate, the rotating gear and the synchronization gear are both arranged between the upper plate and the lower plate, the encoder is arranged on the lower side of the lower plate, the upper plate and the lower plate are rotatably connected with a rotating shaft, and the pressure wheel and the rotating gear are both fixedly connected to the rotating shaft.

[0015] The pressing wheel and the rotating gear are fixedly connected to the rotating shaft, and the rotating shaft is rotatably connected to the upper plate and the lower plate, which can improve the structural stability of the pressing wheel and the rotating gear.

[0016] Preferably, the encoder distance and speed measuring device also includes a base, which is used to be fixed to the outside, and the base is rotatably connected to the mounting seat. A spring is connected between the base and the mounting seat, and the spring is used to provide a force to press the mounting seat toward the chain block.

[0017] Preferably, the synchronization mechanism includes a rotating pulley and a timing belt. The rotating pulley is coaxially fixed on the pressing wheel, and the timing belt is wound between adjacent two rotating pulleys to achieve synchronous rotation.

[0018] Alternatively, the synchronization mechanism includes a rotating pulley, a timing belt pulley and a timing belt. The rotating pulley is coaxially fixed on the pressing wheel, the timing belt pulley is rotatably connected to the detection seat, the timing belt pulley is arranged between two rotating pulleys, and the timing belt is wound between the adjacent rotating pulley and the timing belt pulley to achieve synchronous rotation.

[0019] The connection between two rotating pulleys by the timing belt, or the connection between the rotating pulley and the timing belt pulley by the timing belt can achieve the synchronous rotation of the pressing wheel.

[0020] On the other hand, the present utility model further provides a conveying device with the above encoder ranging and speed measuring device. The conveying device further includes a chain plate conveyor device. The chain plate conveyor device includes a plurality of chain blocks. The center distance between at least two pressing wheels is matched with the length of the chain block, so that at least one pressing wheel presses against the side surface of a chain block when the chain plate conveyor device is running.

[0021] By adopting the above encoder ranging and speed measuring device, at least one pressing wheel presses against the side surface of a chain block when the chain plate conveyor device is running, so that the pressing wheel that generates jitter through the gap of the chain block does not affect the detection of the encoder or has little influence, thereby reducing the detection error and improving the detection accuracy of the conveying distance of the conveying device.

[0022] Preferably, taking the center distance between adjacent two pressing wheels as S, the length of the chain block as L, and the width of the gap between adjacent two chain blocks as d, there is S≠n(L + d)-d~n(L + d)+d, where n is a positive integer.

[0023] When the center distance S between two pressing wheels is not equal to n(L + d)-d~n(L + d)+d, it can be avoided that two pressing wheels are simultaneously in the gap, that is, at least one pressing wheel presses against the side surface of a chain block, improving the detection accuracy. Description of the Drawings

[0024] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present utility model. For those skilled in the art, without creative efforts, other drawings can be obtained based on the structures shown in these drawings.

[0025] Figure 1This is a schematic structural diagram of the encoder ranging and speed measuring device of the present utility model;

[0026] Figure 2 This is a schematic structural diagram of the pressing wheel, rotating gear, synchronous gear and encoder of the present utility model;

[0027] Figure 3 This is a schematic structural diagram when both pressing wheels of the conveying device of the present utility model are pressed on the chain block;

[0028] Figure 4 This is a schematic structural diagram when one pressing wheel passes through the gap between two chain blocks and the other pressing wheel is pressed on the chain block in the conveying device of the present utility model.

[0029] In the attached drawings: 1 - encoder, 2 - detection seat, 21 - upper plate, 22 - lower plate, 3 - pressing wheel, 31 - rotating gear, 32 - synchronous gear, 33 - rotating shaft, 4 - mounting seat, 5 - base, 6 - chain plate conveyor device, 61 - chain block, 62 - gap.

[0030] The realization, functional characteristics and advantages of the purpose of the present utility model will be further described with reference to the embodiments and the attached drawings. Specific embodiments

[0031] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described with reference to the attached 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. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without making creative efforts belong to the protection scope of the present utility model.

[0032] It should be noted that if there are directional indications involved in the embodiments of the present utility model, such as up, down, left, right, front, back, etc., then the directional indications are only used to explain the relative position relationship and movement conditions between components in a certain specific posture. If the specific posture changes, the directional indications will also change accordingly.

[0033] In addition, if there are descriptions such as "first", "second", etc. involved in the embodiments of the present utility model, then the descriptions of "first", "second", etc. are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the fact that those skilled in the art can implement them. When the combination of the technical solutions is contradictory or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the protection scope required by the present utility model.

[0034] like Figures 1 to 4 As shown, an encoder 1 distance and speed measuring device includes an encoder 1 and a detection base 2, at least two pressure wheels 3 are rotatably connected to the detection base 2, the pressure wheels 3 are used to press against the chain block 61, and a synchronization mechanism is connected between all the pressure wheels 3. All the pressure wheels 3 are synchronized by the synchronization mechanism. The detection shaft of the encoder 1 is connected to the pressure wheel 3 in a transmission manner.

[0035] This solution provides at least two pressure wheels 3, and the center distance between the pressure wheels 3 is matched according to the length of the chain block 61, so that at least one pressure wheel 3 can be kept pressed on the side of the chain block 61 during detection. When a pressure wheel 3 passes through the gap 62 between the two chain blocks 61 and jumps, there is still a pressure wheel 3 pressed on the side of the chain block 61; in addition, a synchronization mechanism is connected between all the pressure wheels 3, so that all the pressure wheels 3 can rotate synchronously, and because the friction force of the pressure wheel 3 pressed on the chain block 61 is relatively large, the jumping pressure wheel 3 is driven by the pressure wheel 3 pressed on the chain block 61, so the encoder 1 still keeps detecting the moving distance of the chain block 61, and the pressure wheel 3 that jumps when passing through the gap 62 does not affect the detection of the encoder 1 or the impact is very small, thereby reducing the detection error and improving the detection accuracy.

[0036] In some specific embodiments, the synchronization mechanism includes a rotating gear 31 and a synchronization gear 32. The rotating gear 31 is coaxially fixed on the pressure wheel 3. The synchronization gear 32 is rotationally connected to the detection base 2. The synchronization gear 32 is meshed between two adjacent rotating gears 31 to achieve synchronous rotation.

[0037] A rotating gear 31 is coaxially fixed to the pressing wheel 3 , and two adjacent rotating gears 31 are meshed and connected via a synchronous gear 32 , thereby achieving synchronous rotation of the pressing wheels 3 and making the rotation directions of the pressing wheels 3 the same.

[0038] Furthermore, all the pressure wheels 3 have the same outer diameter, and all the rotating gears 31 have the same pitch circle diameter and number of teeth. This ensures that when the chain block 61 moves the same distance, each pressure wheel 3 rotates the same angle, and the detection value of the encoder 1 is the same, so as to avoid different detection values of the encoder 1 when different pressure wheels 3 press on the chain block 61.

[0039] In some specific embodiments, the distance and speed measuring device of the encoder 1 further includes a mounting seat 4 , the detection seat 2 is rotatably connected to the mounting seat 4 , and the mounting seat 4 is used to press the detection seat 2 toward the chain block 61 .

[0040] The mounting base 4 presses the detection base 2 and the pressure wheel 3 toward the chain block 61 . The detection base 2 can rotate relative to the mounting base 4 , so that the pressure wheel 3 can adapt to fit and press against the side of the chain block 61 , thereby improving the detection accuracy.

[0041] Further, the number of pressing wheels 3 is two. The rotation axes of the mounting base 4 and the detection base 2 are coaxial with the axis of the synchronous gear 32. The encoder 1 is fixedly connected to the mounting base 4, and the detection shaft of the encoder 1 is drivingly connected to the synchronous gear 32.

[0042] The structures of the two pressing wheels 3 are relatively simple. By setting an appropriate center distance, at least one pressing wheel 3 can be pressed on the chain block 61. The two pressing wheels 3 are respectively on both sides of the rotation axes of the mounting base 4 and the detection base 2. The mounting base 4 presses the pressing wheel 3 towards the chain block 61 from the position between the two pressing wheels 3. The detection base 2 can rotate to adapt to the position where the two pressing wheels 3 are attached to the chain block 61, and the axis positions of the synchronous gear 32 and the encoder 1 remain unchanged, making the structure simpler and more compact. In some other embodiments, the number of pressing wheels 3 can also be set to three, four or more, as long as it can press on the chain block 61 for detection.

[0043] Further, the detection shaft of the encoder 1 is coaxially fixed to the synchronous gear 32, and the structure is relatively simple. In some other embodiments, a gear can be additionally fixed on the detection shaft of the encoder 1, and this gear meshes with the synchronous gear 32.

[0044] Further, referring to Figure 2 , the detection base 2 includes an upper plate 21 and a lower plate 22 arranged at intervals up and down. The pressing wheel 3 is arranged on the upper side of the upper plate 21. The rotating gear 31 and the synchronous gear 32 are both arranged between the upper plate 21 and the lower plate 22. The encoder 1 is arranged on the lower side of the lower plate 22. A rotating shaft 33 is rotatably connected to the upper plate 21 and the lower plate 22. Both the pressing wheel 3 and the rotating gear 31 are fixedly connected to the rotating shaft 33.

[0045] The pressing wheel 3 and the rotating gear 31 are fixedly connected to the rotating shaft 33, and the rotating shaft 33 is rotatably connected to the upper plate 21 and the lower plate 22, which can improve the structural stability of the pressing wheel 3 and the rotating gear 31.

[0046] In some specific embodiments, the encoder 1 ranging and speed measuring device further includes a base 5, which is used for external installation and fixation. The base 5 is rotatably connected to the mounting base 4, and a spring is connected between the base 5 and the mounting base 4. The spring is used to provide a force pressing the mounting base 4 towards the chain block 61.

[0047] When the pressing wheel 3 presses on the chain block 61, the spring is set to have a certain resilience to keep the pressing wheel 3 pressing towards the chain block 61. The mounting base 4 can rotate relative to the base 5 and can adapt to the positions of the pressing wheel 3 and the chain block 61, and the structure is relatively simple. The spring can be set as a tension spring or a torsion spring.

[0048] In some specific embodiments, the synchronization mechanism includes a rotating pulley and a synchronous belt. A rotating pulley is coaxially fixed on the pressing wheel 3, and a synchronous belt is wound around between adjacent two rotating pulleys to achieve synchronous rotation;

[0049] Alternatively, the synchronization mechanism includes a rotating pulley, a synchronous pulley, and a synchronous belt. A rotating pulley is coaxially fixed on the pressing wheel 3. The synchronous pulley is rotatably connected to the detection base 2. The synchronous pulley is disposed between two rotating pulleys. A synchronous belt is wound between adjacent rotating pulleys and synchronous pulleys to achieve synchronous rotation.

[0050] The two rotating pulleys are connected by a synchronous belt. The detection shaft of the encoder 1 can be coaxially fixed to the rotating pulley; alternatively, the rotating pulley and the synchronous pulley are connected by a synchronous belt. The detection shaft of the encoder 1 can be coaxially fixed to the rotating pulley or the synchronous pulley, so as to achieve the synchronous rotation of the pressing wheel 3. The synchronous belt here can be a belt-type transmission belt such as a leather belt, a synchronous toothed belt, or a chain.

[0051] On the other hand, referring to Figure 3 and Figure 4 , a conveying device having the above encoder 1 ranging and speed measuring device further includes a chain plate conveyor device 6. The chain plate conveyor device 6 includes a plurality of chain blocks 61. A gap 62 is provided between adjacent chain blocks 61. The center distance between at least two pressing wheels 3 is matched with the length of the chain block 61, so that at least one pressing wheel 3 presses against the side surface of a chain block 61 when the chain plate conveyor device 6 is running. Specifically, the conveying device further includes a frame. A conveying chain is provided on the frame. A plurality of chain blocks 61 are fixed on the conveying chain. The encoder 1 ranging and speed measuring device is installed on the frame. When the chain plate conveyor device 6 is running, a plurality of chain blocks 61 pass through the chain plate conveyor device 6 in sequence, and the pressing wheels 3 sequentially press against a plurality of chain blocks 61 relatively. The frictional force between the chain block 61 and the pressing wheel 3 drives the pressing wheel 3 to rotate.

[0052] By adopting the above encoder 1 ranging and speed measuring device, at least one pressing wheel 3 presses against the side surface of a chain block 61 when the chain plate conveyor device 6 is running, so that the pressing wheel 3 that generates jitter through the gap 62 of the chain block 61 does not affect or has little influence on the detection of the encoder 1, thereby reducing the detection error and improving the detection accuracy of the conveying distance of the conveying device.

[0053] In some specific embodiments, referring to Figure 4 , taking the center distance between two adjacent pressing wheels 3 as S, the length of the chain block 61 as L, and the width of the gap 62 between two adjacent chain blocks 61 as d, there is S≠n(L + d)-d~n(L + d)+d, where n is a positive integer. When the center distance S between the two pressing wheels 3 is not equal to n(L + d)-d~n(L + d)+d, it can be avoided that the two pressing wheels 3 are simultaneously in the gap 62, that is, at least one pressing wheel 3 presses against the side surface of a chain block 61, improving the detection accuracy.

[0054] The following is an example for illustration with the length L of the chain block 61 being 40 mm and the width d of the gap 62 between two adjacent chain blocks 61 being 2 mm. If the center distance S between the two pressing wheels 3 is less than the length of one chain block 61, that is, S is less than 40 mm, then at least one of the two pressing wheels 3 presses on the chain block 61. In addition, the center distance between the two pressing wheels 3 can be greater than the length of one or more chain blocks 61. Preferably, when the center distance is greater than the length of one chain block 61 and less than the length of two chain blocks 61, taking n = 1, then S ≠ 40 - 44 mm, and S can be greater than 44 and less than 82 mm, which can avoid the two pressing wheels 3 being simultaneously in the two gaps 62 on both sides of one chain block 61, and the occupied space of the encoder 1 ranging and speed measuring device is relatively small; when the center distance is greater than the length of two chain blocks 61 and less than the length of three chain blocks 61, taking n = 2, then S ≠ 82 - 86 mm, and S can be greater than 86 and less than 124 mm, which can avoid the two pressing wheels 3 being simultaneously in the two gaps 62 on both sides of two chain blocks 61, and so on.

[0055] The above are only the preferred embodiments of the present invention, and do not thus limit the patent scope of the present invention. Any equivalent structural transformation made under the inventive concept of the present invention by using the content of the specification and drawings of the present invention, or any direct / indirect application in other related technical fields is included in the patent protection scope of the present invention.

Claims

1. An encoder ranging and speed measuring device, characterized in that, It includes an encoder (1) and a detection seat (2). At least two pressing wheels (3) are rotatably connected to the detection seat (2). The pressing wheels (3) are used to press against the chain blocks (61). A synchronization mechanism is connected between all the pressing wheels (3). All the pressing wheels (3) achieve synchronous rotation through the synchronization mechanism. The detection shaft of the encoder (1) is in transmission connection with the pressing wheels (3).

2. The encoder ranging and speed measuring device according to claim 1, wherein The synchronization mechanism includes a rotating gear (31) and a synchronization gear (32). The rotating gear (31) is coaxially fixed on the pressing wheel (3). The synchronization gear (32) is rotatably connected to the detection seat (2). The synchronization gear (32) is meshed and connected between two adjacent rotating gears (31) to achieve synchronous rotation.

3. The encoder ranging and speed measuring device according to claim 2, characterized in that, The encoder distance and speed measuring device further includes a mounting seat (4). The detection seat (2) is rotatably connected to the mounting seat (4). The mounting seat (4) is used to press the detection seat (2) against the chain block (61).

4. The encoder ranging and speed measuring device according to claim 3, characterized in that, The number of the pressing wheels (3) is two. The rotation axes of the mounting seat (4) and the detection seat (2) are coaxially arranged with the axis of the synchronization gear (32). The encoder (1) is fixedly connected to the mounting seat (4). The detection shaft of the encoder (1) is in transmission connection with the synchronization gear (32).

5. The encoder ranging and speed measuring device according to claim 4, wherein The detection shaft of the encoder (1) is coaxially fixed with the synchronization gear (32).

6. The encoder ranging and speed measuring device according to claim 5, wherein The detection seat (2) includes an upper plate (21) and a lower plate (22) which are arranged at intervals up and down. The pressing wheel (3) is arranged on the upper side of the upper plate (21). The rotating gear (31) and the synchronization gear (32) are both arranged between the upper plate (21) and the lower plate (22). The encoder (1) is arranged on the lower side of the lower plate (22). A rotating shaft (33) is rotatably connected to the upper plate (21) and the lower plate (22). The pressing wheel (3) and the rotating gear (31) are both fixedly connected to the rotating shaft (33).

7. The encoder ranging and speed measuring device according to claim 3, characterized in that The encoder distance and speed measuring device further includes a base (5). The base (5) is used for external installation and fixation. The base (5) is rotatably connected to the mounting seat (4). A spring is connected between the base (5) and the mounting seat (4). The spring is used to provide a force for pressing the mounting seat (4) against the chain block (61).

8. The encoder ranging and speed measuring device according to claim 1, characterized in that, The synchronization mechanism includes a rotating belt pulley and a synchronous belt. The rotating belt pulley is coaxially fixed on the pressing wheel (3). The synchronous belt is wound between two adjacent rotating belt pulleys to achieve synchronous rotation; Or, the synchronization mechanism includes a rotating belt pulley, a synchronous belt pulley and a synchronous belt. The rotating belt pulley is coaxially fixed on the pressing wheel (3). The synchronous belt pulley is rotatably connected to the detection seat (2). The synchronous belt pulley is arranged between two rotating belt pulleys. The synchronous belt is wound between the adjacent rotating belt pulley and the synchronous belt pulley to achieve synchronous rotation.

9. A transfer device, characterized in that, Including the encoder ranging and speed measuring device according to any one of claims 1 to 8, the conveying device further includes a chain plate conveyor device (6), the chain plate conveyor device (6) includes a plurality of chain blocks (61), and the center distance between at least two of the pressing wheels (3) is set to match the length of the chain block (61), so that at least one of the pressing wheels (3) presses against the side surface of one of the chain blocks (61) when the chain plate conveyor device (6) is running.

10. The transfer device according to claim 9, characterized in that, Taking the center distance between two adjacent pressing wheels (3) as S, the length of the chain block (61) as L, and the width of the gap (62) between two adjacent chain blocks (61) as d, there is S≠n(L + d)-d~n(L + d)+d, where n is a positive integer.

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