Variable-pitch clamp fork drive device

Abstract

The present invention provides a variable-pitch clamping fork drive device, which relates to the technical field of automated warehousing and transportation equipment, and includes a clamp arm assembly and a screw assembly. The clamp arm assembly includes a left clamp arm and a right clamp arm, and the screw assembly includes a screw, a first movable part, and a second movable part. The two ends of the screw have a positive thread and a reverse thread, and the positive thread and the reverse thread are respectively threadedly connected with the two movable parts. The first movable part and the second movable part are detachably connected to the left clamp arm and the right clamp arm. The screw can rotate and drive the first movable part and the second movable part to move toward or away from each other through threaded cooperation, and then the left clamp arm and the right clamp arm move toward or away from each other. When the screw assembly needs to be replaced, the first movable part is disassembled from the left clamp arm, the second movable part is disassembled from the right clamp arm, and then the left clamp arm and the right clamp arm are connected to the new first movable part and the second movable part, without disassembling the left clamp arm and the right clamp arm, and there is no need to pull the screw out of the two clamp arm threads, and the disassembly and assembly are quick and convenient.

Description

Technical Field

[0001] The present invention relates to the technical field of automated storage and transportation equipment, and in particular to a variable-distance clamping fork driving device. Background Art

[0002] The logistics industry is currently growing stronger and stronger. In order to facilitate the handling of goods, a fork clamping and conveying device has been introduced. It can adjust the distance between the two clamping arms through a screw rod to clamp or release the goods. The fork clamping and conveying device also has a slide rail. After the two clamping arms clamp and fix the goods, the goods can be transported to the target location through the slide rail. However, when the screw rod needs to be replaced, the clamp arm needs to be disassembled or the screw rod needs to be completely pulled out from the clamp arm thread, which is easy to damage the screw rod and is troublesome to disassemble and assemble, which is time-consuming and labor-intensive. Summary of the invention

[0003] Based on this, it is necessary to provide a variable-pitch clamping fork drive device to address the problem that it is troublesome, time-consuming and labor-intensive to disassemble and assemble the lead screw of the fork clamping and conveying equipment.

[0004] The present invention provides a variable-distance clamping fork driving device, comprising:

[0005] A clamp arm assembly, comprising a left clamp arm and a right clamp arm;

[0006] The screw assembly includes a screw, a first movable part and a second movable part, the two ends of the screw have a positive thread and a reverse thread, the positive thread is threadedly connected to the first movable part, and the reverse thread is threadedly connected to the second movable part; the first movable part is detachably connected to the left clamping arm, and the second movable part is detachably connected to the right clamping arm; the screw can rotate and drive the first movable part and the second movable part to move toward or away from each other through threaded cooperation, and then the left clamping arm and the right clamping arm move toward or away from each other to clamp or release objects.

[0007] The variable pitch clamping fork driving device comprises a first movable member detachably connected to the left clamp arm, and a second movable member detachably connected to the right clamp arm. When the screw rod assembly needs to be replaced, it is only necessary to disassemble the first movable member from the left clamp arm, disassemble the second movable member from the right clamp arm, and then connect the left clamp arm and the right clamp arm to the new first movable member and the second movable member, without disassembling the left clamp arm and the right clamp arm, and even more without extracting the screw from the two clamp arms. The disassembly and assembly is quick and convenient, saving time and effort.

[0008] In one embodiment, the first movable part includes a first threaded sleeve, a first flange and a first screw that are connected to each other. The first threaded sleeve is provided with an internal thread and is connected to the positive thread through the internal thread. The first flange has a mounting through hole. The first screw passes through the mounting through hole and is threadedly connected to the left clamp arm.

[0009] In one embodiment, the first flange includes a first face plate and a second face plate connected to each other, the second face plate is connected to the first screw sleeve, the first face plate is arranged on the side of the second face plate facing away from the first screw sleeve, the longitudinal cross-sectional area of ​​the first face plate is smaller than the longitudinal cross-sectional area of ​​the second face plate, the thickness of the first face plate and the second face plate are inconsistent, and the first face plate and the second face plate are both provided with the mounting through hole.

[0010] In one embodiment, the number of the first movable members is two, and the two first movable members are respectively installed on two sides of the left clamping arm.

[0011] In one embodiment, the left clamp arm is provided with a non-closed avoidance groove, and the screw rod is located in the avoidance groove.

[0012] In one embodiment, the first movable member and the second movable member have the same structure, and the left clamping arm and the right clamping arm have the same structure.

[0013] In one embodiment, it also includes a slide rail, a first slider and a second slider, the first slider and the second slider are both slidably arranged on the slide rail, the first slider is connected to the left clamp arm, and the second slider is connected to the right clamp arm, when the screw rod rotates and drives the left clamp arm and the right clamp arm to move toward or away from each other, the first slider and the second slider slide toward or away from each other.

[0014] In one of the embodiments, it further includes a conveying assembly and a conveying pallet connected to each other, wherein the conveying assembly can drive the conveying pallet to perform linear motion relative to the left clamp arm to convey the goods on the conveying pallet.

[0015] In one embodiment, the conveying assembly includes a first rotating wheel, a second rotating wheel, a conveyor belt and a power rod, the first rotating wheel and the second rotating wheel are both rotatably arranged on the left clamping arm, the conveyor belt is sleeved on the first rotating wheel and the second rotating wheel, the conveying pallet is arranged on the conveyor belt, the first rotating wheel is connected to the power rod, the power rod can rotate and drive the first rotating wheel to rotate, so as to drive the conveyor belt to move, and then the conveyor belt drives the conveying pallet to make a linear motion relative to the left clamping arm.

[0016] In one embodiment, the conveying assembly also includes a driving motor and two fixed seats, and the two ends of the power rod are rotatably connected to the two fixed seats. The driving motor is connected to the power rod and can drive the power rod to rotate, thereby driving the conveying pallet to perform linear motion relative to the left clamping arm. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1It is a schematic structural diagram of the variable-length clamping fork driving device of the present invention;

[0018] Figure 2 It is a schematic diagram of the disassembled structure of the variable-length clamping fork driving device of the present invention;

[0019] Figure 3 It is a schematic diagram of the connection structure of the base, the screw assembly and the transmission assembly of the present invention;

[0020] Figure 4 for Figure 3 An enlarged schematic diagram of part A in FIG.

[0021] Figure 5 It is a schematic diagram of the structure of the transmission component of the present invention.

[0022] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0023] 100. Variable-pitch clamping fork drive device;

[0024] 1. Base; 11. Bottom plate; 12. First slide rail; 13. Second slide rail; 14. First slide block; 15. Second slide block; 16. Limit block;

[0025] 2. Screw assembly; 21. Servo motor; 22. Screw; 23. First movable part; 231. First screw sleeve; 232. First flange; 2321. Mounting through hole; 2322. First face plate; 2323. Second face plate; 233. First screw; 24. Second movable part; 25. First fixing seat; 26. Second fixing seat;

[0026] 3. Conveying assembly; 31. Driving motor; 32. Third fixing seat; 33. Fourth fixing seat; 34. First rotating wheel; 35. Second rotating wheel; 36. Conveying belt; 37. Power rod; 38. Conveying pallet;

[0027] 4. Clamp arm assembly; 41. Left clamp arm; 42. Right clamp arm; 43. Avoidance groove. DETAILED DESCRIPTION

[0028] In order to make the above-mentioned purposes, features and advantages of the present invention more obvious and understandable, the specific implementation methods of the present invention are described clearly and completely below in conjunction with the accompanying drawings. Obviously, the specific details described below are only part of the embodiments of the present invention, and the present invention can also be implemented in many other embodiments different from those described herein. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work belong to the protection scope of the present invention.

[0029] It should be noted that when an element is referred to as being "fixed to" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only and do not represent the only implementation method.

[0030] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present invention. The terms used in the specification of the present invention herein are only for the purpose of describing specific embodiments and are not intended to limit the present invention.

[0031] refer to Figure 1 The present invention provides a variable-pitch clamping fork driving device 100, which is used to transport goods to assist logistics personnel in their work. The variable-pitch clamping fork driving device includes a clamping arm assembly for clamping or releasing goods. The device can be disassembled and replaced as a whole when replacing the screw rod, without the need to extract the individual screw rod from the clamping arm assembly thread, and without the need to disassemble the clamping arm assembly, and the disassembly and assembly is quick and convenient, saving time and effort.

[0032] The variable-pitch clamping fork driving device includes a base 1, a screw assembly 2, a transmission assembly 3 and a clamping arm assembly 4. The screw assembly 2 and the transmission assembly 3 are both arranged on the base 1, and the clamping arm assembly 4 is connected to the base 1, the screw assembly 2 and the transmission assembly 3 at the same time.

[0033] The base 1 includes a bottom plate 11 and a first slide rail 12, a second slide rail 13, a first slider 14 and a second slider 15 arranged on the bottom plate 11. The first slide rail 12 and the second slide rail 13 are arranged on opposite sides of the bottom plate 11. There are multiple first sliders 14 and second sliders 15, wherein a portion of the first sliders 14 are arranged on the first slide rail 12, and another portion of the first sliders 14 are arranged on the second slide rail 13. A portion of the second sliders 15 are arranged on the first slide rail 12, and another portion of the second sliders 15 are arranged on the second slide rail 13. The first slider 14 on the first slide rail 12 is arranged opposite to the first slider 14 on the second slide rail 13, and the second slider 15 on the first slide rail 12 is arranged opposite to the second slider 15 on the second slide rail 13.

[0034] The two ends of the clamp arm assembly 4 can be connected to the first slider 14 and the second slider 15 on the two slide rails respectively. Driven by the screw assembly 2, the clamp arm assembly 4 can slide back and forth on the two slide rails through the first slider 14 and the second slider 15 to clamp or release the goods.

[0035] A limiting block 16 is disposed in the middle of the first slide rail 12 and the second slide rail 13 . The limiting block 16 is used to limit the position of the clamping arm assembly 4 .

[0036] The clamp arm assembly 4 comprises a left clamp arm 41 and a right clamp arm 42. The left clamp arm 41 and the right clamp arm 42 can approach each other to clamp and fix the goods. The left clamp arm 41 and the right clamp arm 42 can also separate from each other to release the goods.

[0037] The left clamp arm 41 and the right clamp arm 42 are both provided with a non-enclosed avoidance groove 43 , and the avoidance groove 43 is in a long strip shape. In other embodiments, the avoidance groove 43 may also be in other shapes, which are not limited here.

[0038] The left clamp arm 41 and the right clamp arm 42 are both provided with two mounting holes 44 , and the mounting holes 44 are not closed. The left clamp arm 41 and the right clamp arm 42 can be mounted and connected with the transmission assembly 3 through the mounting holes 44 .

[0039] The screw assembly 2 is arranged on the bottom plate 11, and the screw assembly 2 includes a servo motor 21, a screw rod 22, a first movable member 23, a second movable member 24, a first fixed seat 25, and a second fixed seat 26. The first fixed seat 25 and the second fixed seat 26 are both arranged on the bottom plate 11, one end of the screw rod 22 is rotatably connected to the first fixed seat 25, and the other end is connected to the servo motor 21, and the servo motor 21 is arranged on the second fixed seat 26. The first movable member 23 and the second movable member 24 are both threadedly connected to the screw rod 22.

[0040] The first movable member 23 is connected to the left clamping arm 41, and the second movable member 24 is connected to the right clamping arm 42. The servo motor 21 can drive the screw rod 22 to rotate, and drive the first movable member 23 and the second movable member 24 to move closer to or away from each other through threaded cooperation, thereby driving the left clamping arm 41 and the right clamping arm 42 to move closer to or away from each other to clamp or release the goods.

[0041] The two ends (both sides) of the screw 22 have a positive thread and a reverse thread, and the thread directions of the positive thread and the reverse thread are opposite. The first movable member 23 is threadedly connected with the positive thread, and the second movable member 24 is threadedly connected with the reverse thread. When the servo motor 21 drives the screw 22 to rotate, the positive thread and the reverse thread of the thread 22 drive the first movable member 23 and the second movable member 24 to move closer to or away from each other through thread matching, and then the left clamping arm 41 and the right clamping arm 42 clamp or release the goods. Of course, in other embodiments, the screw 22 can also be spliced ​​by two studs with opposite thread directions, and the two studs are respectively threadedly connected to the first movable member 23 and the second movable member 24. When the servo motor 21 drives one of the studs to rotate, the effect of the first movable member 23 and the second movable member 24 moving closer to or away from each other can also be achieved.

[0042] The screw rod 22 is located in the avoidance groove 43 formed between the left clamp arm 41 and the right clamp arm 42 , so that the first movable member 23 on the screw rod 22 can be conveniently connected to the left clamp arm 41 from multiple positions, and the second movable member 24 can be conveniently connected to the right clamp arm 42 from multiple positions.

[0043] The structures of the first movable member 23 and the second movable member 24 may be consistent or not completely consistent. Not completely consistent can be understood as different connection structures between the two movable members and the corresponding clamping arms. The structures of the first movable member 23 and the second movable member 24 of this embodiment are consistent, which is convenient for use as a set. The following only introduces the structure of the first movable member 23 and the connection method with the left clamping arm 41, and the structure of the second movable member 24 and the connection method with the right clamping arm are not redundantly described.

[0044] The first movable member 23 includes a first screw sleeve 231, a first flange 232 and a first screw 233 connected to each other. The first screw sleeve 231 is provided with an internal thread and is connected with the positive thread through the internal thread. The first flange 232 has a mounting through hole 2321. The first screw 233 is threadedly connected to the clamp arm assembly through the mounting through hole 2321. It can be understood that in other embodiments, the first movable member 23 can also be detachably connected to the left clamp arm 41 in other ways, such as buckling or clamping, which is not limited here.

[0045] The first flange 232 includes a first face plate 2322 and a second face plate 2323 connected to each other, the second face plate 2323 is connected to the first screw sleeve 231, the first face plate 2322 is arranged on the side of the second face plate 2323 facing away from the first screw sleeve 231, the longitudinal section area of ​​the first face plate 2322 is smaller than the longitudinal section area of ​​the second face plate 2323, and the longitudinal section is a plane perpendicular to the central axis of the screw rod 22. The thickness of the first face plate 2322 and the second face plate 2323 are inconsistent, and the thickness of the first face plate 2322 is significantly greater than the thickness of the second face plate 2323, so that the first flange 232 has good rigidity and is not easy to deform. Both the first face plate 2322 and the second face plate 2323 are provided with a mounting through hole 2321, and a plurality of first screws 233 can be prepared, and the plurality of first screws 233 can be respectively penetrated through each mounting through hole 2321 and threadedly connected to the left clamp arm 41, so that the first movable member 23 is stably connected to the left clamp arm 41.

[0046] There are two first movable members 23 , which are respectively mounted on two sides of the left clamp arm 41 , so that the connection between the left clamp arm 41 and the first movable members 23 is more stable.

[0047] When the screw assembly 2 or the screw rod 22 needs to be replaced, the first screw 233 connecting the first movable part 23 with the left clamp arm 41 can be removed first, and the screw connecting the second movable part 24 with the right clamp arm 42 can be removed. The left clamp arm 41 and the right clamp arm 42 can be moved to another device, which has a new screw assembly 2. The left clamp arm 41 and the right clamp arm 42 can be connected to the new first movable part 23 and the second movable part 24 through the first screw 233 to complete the replacement. There is no need to thread and extract the screw rod 22 from the left clamp arm 41 and the right clamp arm 42, and there is no need to disassemble the left clamp arm 41 and the right clamp arm 42 themselves, which saves time and effort and is easy to operate.

[0048] The transmission assembly 3 includes a driving motor 31, a third fixed seat 32, a fourth fixed seat 33, a first rotating wheel 34, a second rotating wheel 35, a conveyor belt 36, a power rod 37 and a conveyor support plate 38. The third fixed seat 32 and the fourth fixed seat 33 are arranged on opposite sides of the bottom plate 11. One end of the power rod 37 is rotatably connected to the third fixed seat 32, and the other end is connected to the driving motor 31. The driving motor 31 is arranged on the fourth fixed seat 33. The conveyor belt 36 is sleeved on the first rotating wheel 34 and the second rotating wheel 35. The first rotating wheel 34 is sleeved on the power rod 37. As the power rod 37 rotates, the first rotating wheel 34 can rotate accordingly. In addition, the first rotating wheel 34 can move along the length direction of the power rod 37. The second rotating wheel is rotatably arranged on the left clamp arm 41. The driving motor 31 can drive the power rod 37 to rotate, so that the power rod 37 drives the first rotating wheel 34 to rotate, and the first rotating wheel 34 drives the second rotating wheel 35 to rotate through the conveyor belt 36.

[0049] The conveying pallet 38 is arranged on the first rotating wheel 34 and the second rotating wheel 35, and the conveying pallet 38 is used to load the goods. When the driving motor 31 drives the conveyor belt 36 to rotate cyclically, the conveyor belt 36 can drive the conveying pallet 38 to do linear motion, and transport the goods located on the conveyor belt 36 to the target position.

[0050] There are two first wheels 34 and two second wheels 35, one set of which is mounted on the mounting hole 44 of the left clamp arm 41, and the other set of which is mounted on the mounting hole 44 of the right clamp arm 42. The first wheels 34 and the second wheels 35 both have flanges for detachably connecting with the corresponding left clamp arm 41 and right clamp arm 42.

[0051] When the conveyor belt 36 needs to be replaced, the first rotating wheel 34 and the second rotating wheel 35 can be first disassembled and separated from the corresponding clamping arms, withdrawn from the mounting hole 44 of the clamping arms, and then the conveyor belt 36 can be taken out from the end of the power rod 37 and replaced with a new conveyor belt 36 for installation. The entire operation process is simple, saving time and effort.

[0052] The technical features of the above embodiments may be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0053] The above embodiments only express several implementation methods of the present invention, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the invention patent. It should be pointed out that, for those of ordinary skill in the art, several variations, substitutions and improvements can be made without departing from the concept of the present invention, and these should all be included in the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be subject to the claims.

Claims

1. A variable-length clamping fork driving device, characterized in that: include: A clamp arm assembly, comprising a left clamp arm and a right clamp arm; The screw assembly comprises a screw rod, a first movable member and a second movable member, the two ends of the screw rod have a positive thread and a reverse thread, the positive thread is threadedly connected to the first movable member, and the reverse thread is threadedly connected to the second movable member; the first movable member is detachably connected to the left clamp arm, and the second movable member is detachably connected to the right clamp arm; the screw rod can rotate and drive the first movable member and the second movable member to move toward or away from each other through threaded engagement, so that the left clamp arm and the right clamp arm move toward or away from each other to clamp or release an object; It also includes a transmission assembly and a transmission pallet connected to each other, wherein the transmission assembly can drive the transmission pallet to perform linear motion relative to the left clamp arm to transmit the goods on the transmission pallet; The transmission assembly includes a first rotating wheel, a second rotating wheel, a conveyor belt and a power rod, the first rotating wheel and the second rotating wheel are both rotatably arranged on the left clamp arm, the conveyor belt is sleeved on the first rotating wheel and the second rotating wheel, the conveyor support plate is arranged on the conveyor belt, the first rotating wheel is connected to the power rod, the power rod can rotate to drive the first rotating wheel to rotate, so as to drive the conveyor belt to move, and then the conveyor belt drives the conveyor support plate to make a linear motion relative to the left clamp arm; The left clamp arm and the right clamp arm are both provided with two mounting holes, and the mounting holes are not closed; the left clamp arm and the right clamp arm are installed and connected with the transmission component through the mounting holes; There are two first rotating wheels and two second rotating wheels, one set of which is installed in the mounting hole of the left clamp arm, and the other set of which is installed in the mounting hole of the right clamp arm; the first rotating wheels and the second rotating wheels both have flanges for detachably connecting with the corresponding left clamp arm and right clamp arm; When replacing the conveyor belt, the first rotating wheel and the second rotating wheel are disassembled and separated from the corresponding clamping arms, withdrawn from the mounting holes of the clamping arms, and then the conveyor belt is taken out from the end of the power rod and replaced with a new conveyor belt for installation.

2. The variable-length clamping fork driving device according to claim 1 is characterized in that: The first movable part includes a first threaded sleeve, a first flange and a first screw which are connected to each other. The first threaded sleeve is provided with an internal thread and is connected to the positive thread through the internal thread. The first flange has a mounting through hole. The first screw passes through the mounting through hole and is threadedly connected to the left clamp arm.

3. The variable-length clamping fork driving device according to claim 2 is characterized in that: The first flange includes a first face plate and a second face plate connected to each other, the second face plate is connected to the first screw sleeve, the first face plate is arranged on the side of the second face plate facing away from the first screw sleeve, the longitudinal cross-sectional area of ​​the first face plate is smaller than the longitudinal cross-sectional area of ​​the second face plate, the thickness of the first face plate and the second face plate are inconsistent, and the first face plate and the second face plate are both provided with the mounting through hole.

4. The variable-length clamping fork driving device according to claim 2, characterized in that: The number of the first movable members is two, and the two first movable members are respectively installed on both sides of the left clamping arm.

5. The variable-length clamping fork driving device according to any one of claims 1 to 4, characterized in that: The left clamp arm is provided with a non-enclosed avoidance groove, and the screw rod is located in the avoidance groove.

6. The variable-length clamping fork driving device according to any one of claims 1 to 4, characterized in that: The first movable member and the second movable member have the same structure, and the left clamping arm and the right clamping arm have the same structure.

7. The variable-length clamping fork driving device according to claim 1, characterized in that: It also includes a slide rail, a first slider and a second slider, wherein the first slider and the second slider are both slidably arranged on the slide rail, the first slider is connected to the left clamp arm, and the second slider is connected to the right clamp arm, and when the screw rod rotates to drive the left clamp arm and the right clamp arm to move toward or away from each other, the first slider and the second slider slide toward or away from each other.

8. The variable-length clamping fork driving device according to claim 7, characterized in that: It also includes two fixed seats, and the transmission assembly also includes a driving motor. The two ends of the power rod are rotatably connected to the two fixed seats. The driving motor is connected to the power rod and can drive the power rod to rotate, thereby driving the transmission pallet to perform linear motion relative to the left clamping arm.

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