High-precision narrow heavy cargo fork

Abstract

The utility model discloses a high-precision narrow heavy cargo fork which comprises a driving mechanism and at least two groups of fork arms capable of stretching and retracting in two directions, and the driving mechanism is used for driving the fork arms to stretch and retract in two directions. All driving mechanisms are in meshing transmission through gears and racks, so that the overall failure rate is low, the service life is long, and the telescopic positioning precision of the pallet fork is high. The fork arm of the fork is narrow in width and compact in structure, the cost is reduced, the requirement that the width direction of a goods taking space is narrow is met, meanwhile, the base assembly, the middle rail assembly and the upper rail assembly are telescopic in a stepped mode, and small bending deformation is achieved while heavy goods are borne.

Description

Technical Field

[0001] The utility model relates to the technical field of warehousing and conveying, in particular to a high-precision narrow heavy-load fork. Background Art

[0002] At present, forks are widely used in logistics warehousing, metal smelting, automobile manufacturing, new energy industry, battery swap stations, agriculture, retail industry and other industries. The reduction motor and drive shaft of traditional forks are driven by sprockets and roller chains, and the upper rail is also extended and retracted by chain pulling. Since the chain needs to be tightened or replaced regularly, the positioning accuracy of the fork is low, only ±3mm, which is prone to travel tolerance, derailment and other faults; and the traditional heavy-duty forks (more than 2 tons) have a fork arm width of at least 240mm and a fork arm height of more than 130mm, which takes up a lot of space and has high costs, and cannot meet the use conditions of narrow spaces. Utility Model Content

[0003] In order to solve the above technical problems, the utility model provides a high-precision narrow heavy-duty fork, all driving mechanisms are gear and rack meshing transmission, so that the overall failure rate is low, the service life is long, and the telescopic positioning accuracy of the fork is high. In addition, the fork arm width of this fork is narrow, the structure is compact, the cost is reduced, and the demand for narrow width direction of the cargo picking space is met. At the same time, the base assembly, the middle rail assembly and the upper rail assembly are stepped to extend and retract, and there is less bending deformation while carrying heavy cargo.

[0004] The technical solution of the utility model is: a high-precision narrow heavy-duty fork, which comprises a driving mechanism and at least two sets of fork arms that can be telescopic in both directions, wherein the driving mechanism is used to drive the fork arms to telescopic in both directions;

[0005] The fork arm comprises a base assembly, a middle rail assembly and an upper rail assembly, wherein the middle rail assembly is arranged on the upper part of the base assembly, the upper rail assembly is arranged on the upper part of the middle rail assembly, the base assembly is provided with a first gear assembly and a first rack, the middle rail assembly is provided with a second gear assembly and a second rack, and the lower part of the upper rail assembly is provided with a third rack, the first gear assembly is meshed with the second rack, and the second gear assembly is respectively meshed with the first rack and the third rack;

[0006] The driving mechanism engages the first gear assembly with the second rack to drive the middle rail assembly to move left or right, the second gear assembly engages with the first rack, the second gear assembly rotates when the middle rail assembly moves, and the second gear assembly engages with the third rack to drive the upper rail assembly to move left or right.

[0007] Preferably, the base assembly includes two symmetrically arranged base upright plates, a plurality of base mounting plates, a plurality of first clamping plates and a plurality of first pin shaft spacer sets, the two base upright plates are arranged on the upper part of the base mounting plates, the first pin shaft spacer set is arranged between the two base upright plates, the first clamping plate is arranged between the two base upright plates, the first pin shaft spacer set and the first clamping plate are both used to connect and fix the two base upright plates, and the first gear assembly is arranged between the two base upright plates through the first pin shaft spacer set;

[0008] A plurality of first bearing followers and a plurality of first guide limit blocks are arranged on opposite sides of the two base plates, a first limit block is arranged at one end of the inner side of one base plate, a second limit block is arranged at one end of the inner side of the other base plate away from the first limit block, and a sensor is arranged on the inner side of the base plate.

[0009] Preferably, the first gear assembly includes two symmetrically arranged gear fixing plates, a gear shaft, a first driven gear, a second driven gear, a plurality of third driven gears and a plurality of first transition gears, the gear shaft is arranged at the lower part of the two gear fixing plates, the first driven gear, the second driven gear, a plurality of third driven gears and a plurality of first transition gears are all arranged between the two gear fixing plates, the first driven gear is meshed with the gear shaft, the gear shaft is meshed with the second driven gear, the second driven gear is meshed with the third driven gear, and the first transition gear and the third driven gear are arranged at intervals.

[0010] Preferably, a plurality of second clamping plates and a plurality of second pin shaft spacer kits are also arranged between the gear fixing plates, and the second clamping plates and the plurality of second pin shaft spacer kits are used to connect and fix the two gear fixing plates, and a plurality of rack mounting plates are arranged at the lower part of the gear fixing plates, and the first rack is arranged at the upper part of the rack mounting plates.

[0011] Preferably, the middle rail assembly comprises a middle rail member, a first middle rail limit block, a second middle rail limit block and a trigger plate, wherein the first middle rail limit block is arranged on one side of one end of the lower part of the middle rail member, the second middle rail limit block is arranged on the other side of the other end of the lower part of the middle rail member, and the second rack is arranged at the lower part of the middle rail member;

[0012] Two first slide grooves are arranged on both sides of the middle rail member, a second slide groove is arranged on the upper part of the middle rail member, and two third slide grooves are arranged on both sides of the second slide groove.

[0013] Preferably, the second gear assembly includes a plurality of fourth driven gears and a plurality of second transition gears, and the plurality of the fourth driven gears and the plurality of the second transition gears are arranged at intervals.

[0014] Preferably, the upper rail assembly includes an upper rail member, a plurality of second bearing followers and a plurality of second guide limit blocks, wherein the plurality of second bearing followers and the plurality of second guide limit blocks are arranged on both sides of the upper rail member, and the third rack is arranged at the lower part of the upper rail member.

[0015] Preferably, the driving mechanism comprises a servo motor, a reducer and a driving gear, the output end of the servo motor is connected to the reducer, the output end of the reducer is connected to the driving gear, and the driving gear is meshed with the first driven gear.

[0016] Preferably, the upper rail member is configured as a "T"-shaped upper rail member.

[0017] The beneficial technical effects of the utility model are:

[0018] 1. All driving mechanisms of the fork adopt gear and rack meshing transmission, which makes the overall failure rate low and the service life long. The telescopic positioning accuracy of the fork is high and can reach ±1mm.

[0019] 2. The width of a single fork arm of the fork is narrow, only within 100mm, with a compact structure, which reduces costs and meets the needs of narrow width direction of the picking space.

[0020] 3. The thickness of a single fork arm of the fork is within 130mm. At the same time, the base assembly, middle rail assembly and upper rail assembly are extended and retracted in a stepped manner. While carrying heavy goods, it has a small bending deformation and can carry heavy goods of more than 2 tons. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0022] Figure 2 The base assembly structure of the utility model is shown in FIG. Figure 1 ;

[0023] Figure 3 for Figure 2 A partial enlarged schematic diagram;

[0024] Figure 4 The base assembly structure of the utility model is shown in FIG. Figure 2 ;

[0025] Figure 5 The base assembly structure of the utility model is shown in FIG. Figure 3 ;

[0026] Figure 6 This is a schematic diagram of the structure of the middle rail assembly of the utility model;

[0027] Figure 7 for Figure 6 A partial enlarged schematic diagram;

[0028] Figure 8 This is a schematic diagram of the structure of the upper rail assembly of the utility model;

[0029] Fig. 9 It is a schematic diagram of the driving mechanism structure of the utility model.

[0030] The accompanying drawings are marked as follows:

[0031] 100, driving mechanism; 101, servo motor; 102, speed reducer; 103, driving gear;

[0032] 200, fork arm; 201, base assembly; 2011, base upright plate; 2012, base mounting plate; 2013, first clamping plate; 2014, first pin shaft spacer kit; 2015, first bearing follower; 2016, first guide stop block; 2017, first stop block; 2018, second stop block; 2019, sensor; 202, middle rail assembly; 2021, middle rail member; 2022, first middle rail stop block; 2023, second middle rail stop block; 2024, trigger plate; 2025, first slide slot; 2026, second slide slot; 2027, third slide slot; 203, upper rail assembly; 2031, upper rail member; 2032, second bearing follower; 2033, second guide stop block;

[0033] 300, first gear assembly; 301, gear fixing plate; 302, gear shaft; 303, first driven gear; 304, second driven gear; 305, third driven gear; 306, first transition gear; 307, second clamping plate; 308, second pin shaft spacer kit;

[0034] 400, first rack;

[0035] 500, second gear assembly; 501, fourth driven gear; 502, second transition gear;

[0036] 600, second rack;

[0037] 700. Third rack. DETAILED DESCRIPTION

[0038] In order to more clearly understand the technical means of the utility model and implement it according to the contents of the specification, the specific implementation methods of the utility model are further described in detail below in conjunction with the drawings and embodiments. The following embodiments are used to illustrate the utility model but are not used to limit the scope of the utility model.

[0039] like Figure 1-9As shown, the utility model specifically relates to a high-precision narrow heavy-duty fork, which comprises a driving mechanism 100 and at least two sets of fork arms 200 that can be telescopic in both directions, wherein the two sets of fork arms 200 are connected by a coupling for transmission, and the driving mechanism 100 is used to drive the fork arms 200 to telescopic in both directions;

[0040] The fork arm 200 includes a base assembly 201, a middle rail assembly 202 and an upper rail assembly 203, wherein the middle rail assembly 202 is arranged at the upper part of the base assembly 201, and the upper rail assembly 203 is arranged at the upper part of the middle rail assembly 202. The base assembly 201 is provided with a first gear assembly 300 and a first rack 400, the middle rail assembly 202 is provided with a second gear assembly 500 and a second rack 600, and the lower part of the upper rail assembly 203 is provided with a third rack 700, the first gear assembly 300 is meshed with the second rack 600, and the second gear assembly 500 is meshed with the first rack 400 and the third rack 700 respectively;

[0041] The driving mechanism 100 drives the first gear assembly 300 to rotate, and the first gear assembly 300 engages with the second rack 600 to drive the middle rail assembly 202 to move left or right, and the second gear assembly 500 engages with the first rack 400. When the middle rail assembly 202 moves, the second gear assembly 500 rotates, and at the same time, the second gear assembly 500 engages with the third rack 700 to drive the upper rail assembly 203 to move left or right.

[0042] All driving mechanisms 100 of the fork adopt gear and rack meshing transmission, so that the overall failure rate is low and the service life is long. The telescopic positioning accuracy of the fork is high and can reach ±1mm.

[0043] Further, refer to Figure 2 , 3 , 4 and 5, the base assembly 201 includes two symmetrically arranged base plates 2011, a plurality of base mounting plates 2012, a plurality of first clamping plates 2013 and a plurality of first pin shaft spacer sets 2014, the two base plates 2011 are arranged on the upper part of the base mounting plates 2012, the first pin shaft spacer set 2014 is arranged between the two base plates 2011, the first clamping plate 2013 is arranged between the two base plates 2011, the first pin shaft spacer set 2014 and the first clamping plate 2013 are both used to connect and fix the two base plates 2011, and the first gear assembly 300 is arranged between the two base plates 2011 through the first pin shaft spacer set 2014;

[0044] A plurality of first bearing followers 2015 and a plurality of first guide limit blocks 2016 are arranged on opposite sides of the two base plates 2011, a first limit block 2017 is arranged at one end of the inner side of one base plate 2011, a second limit block 2018 is arranged at one end of the inner side of the other base plate 2011 away from the first limit block 2017, a sensor 2019 is arranged on the inner side of the base plate 2011, and the sensor 2019 is arranged in the middle position of the left and right sides of the base plate 2011.

[0045] It should be further explained that, referring to Figure 6 and 7 As shown, the middle rail assembly 202 includes a middle rail member 2021, a first middle rail limit block 2022, a second middle rail limit block 2023 and a trigger plate 2024, wherein the first middle rail limit block 2022 is arranged on one side of one end of the lower portion of the middle rail member 2021, the second middle rail limit block 2023 is arranged on the other side of the other end of the lower portion of the middle rail member 2021, and the second rack 600 is arranged at the lower portion of the middle rail member 2021;

[0046] When the middle rail 2021 moves to the left, the first middle rail limit block 2022 contacts the first limit block 2017 to limit the middle rail 2021. When the middle rail 2021 moves to the right, the second middle rail limit block 2023 contacts the second limit block 2018 to limit the middle rail 2021 to prevent the middle rail 2021 from derailing during the movement to the left or right. In addition, the trigger plate 2024 is set in the middle of the middle rail 2021. When the trigger plate 2024 moves with the middle rail 2021, the trigger plate 2024 moves to the upper part of the sensor 2019, and the sensor 2019 senses the trigger plate 2024. At this time, the middle rail 2021 is in the return position, and the controller receives the signal from the sensor, and the controller controls the servo motor 101 to stop rotating.

[0047] Two first slide grooves 2025 are arranged on both sides of the middle rail member 2021, and a plurality of first bearing followers 2015 and a plurality of first guide limit blocks 2016 can be placed in the first slide grooves 2025, so that when the middle rail member 2021 moves left and right, the plurality of first bearing followers 2015 can bear the load force in the vertical direction of the middle rail member 2021, and the plurality of first guide limit blocks 2016 can guide and limit the left and right moving trajectory of the middle rail member 2021;

[0048] In addition, if Figure 8As shown, the upper rail assembly 203 includes an upper rail member 2031, a plurality of second bearing followers 2032 and a plurality of second guide limit blocks 2033, wherein the plurality of second bearing followers 2032 and the plurality of second guide limit blocks 2033 are arranged on both sides of the upper rail member 2031, and the third rack 700 is arranged at the lower part of the upper rail member 2031.

[0049] The middle rail 2021 is provided with a second slide groove 2026 on the upper part, and two third slide grooves 2027 are provided on both sides of the second slide groove 2026. The upper rail 2031 can be placed in the second slide groove 2026, and a plurality of second bearing followers 2032 and a plurality of second guide limit blocks 2033 can be placed in the third slide groove 2027, so that when the upper rail 2031 moves left and right, the plurality of second bearing followers 2032 can bear the load force in the vertical direction of the upper rail 2031, and the plurality of second guide limit blocks 2033 can guide and limit the left and right moving track of the upper rail 2031.

[0050] Among them, the first gear assembly 300 includes two symmetrically arranged gear fixing plates 301, a gear shaft 302, a first driven gear 303, a second driven gear 304, a plurality of third driven gears 305 and a plurality of first transition gears 306, the gear shaft 302 is arranged at the lower part of the two gear fixing plates 301, the first driven gear 303, the second driven gear 304, the plurality of third driven gears 305 and the plurality of first transition gears 306 are all arranged between the two gear fixing plates 301, the first driven gear 303 is meshed with the gear shaft 302, the gear shaft 302 is meshed with the second driven gear 304, the second driven gear 304 is meshed with a third driven gear 305, the first transition gear 306 and the third driven gear 305 are arranged at intervals to realize the same direction rotation of the plurality of third driven gears 305, the plurality of third driven gears 305 are all meshed with the second rack 600, and the plurality of first transition gears 306 are not meshed with the second rack 600.

[0051] A plurality of second clamping plates 307 and a plurality of second pin shaft spacer kits 308 are also arranged between the gear fixing plates 301, and the second clamping plates 307 and the plurality of second pin shaft spacer kits 308 are used to connect and fix the two gear fixing plates 301, and a plurality of rack mounting plates are arranged at the lower part of the gear fixing plates 301, and the first rack 400 is arranged at the upper part of the rack mounting plates.

[0052] The second gear assembly 500 includes a plurality of fourth driven gears 501 and a plurality of second transition gears 502. The plurality of fourth driven gears 501 and the plurality of second transition gears 502 are arranged at intervals to achieve the same-direction rotation of the plurality of fourth driven gears 501. The plurality of fourth driven gears 501 are all meshed with the first rack 400 and the third rack 700, and the plurality of second transition gears 502 are not meshed with the first rack 400 and the third rack 700.

[0053] It should be further explained that the driving mechanism 100 includes a servo motor 101 , a reducer 102 and a driving gear 103 , the output end of the servo motor 101 is connected to the reducer 102 , the output end of the reducer 102 is connected to the driving gear 103 , and the driving gear 103 is meshed with the first driven gear 303 .

[0054] The upper rail member 2031 is configured as a “T”-shaped upper rail member 2031 .

[0055] Working principle:

[0056] 1. The servo motor 101 drives the reducer 102 to rotate, the reducer 102 drives the driving gear 103 to rotate, the driving gear 103 drives the first driven gear 303 to rotate, the first driven gear 303 drives the gear shaft 302 to rotate, the gear shaft 302 drives the second driven gear 304 to rotate, the second driven gear 304 drives one of the third driven gears 305 to rotate, one of the third driven gears 305 drives the other third driven gears 305 to rotate through the first transition gear 306, the third driven gear 305 meshes with the second rack 600, and drives the middle rail member 2021 to move left and right;

[0057] 2. When the middle rail 2021 is moving, the fourth driven gear 501 meshes with the first rack 400, and the fourth driven gear 501 rotates. At the same time, the fourth driven gear 501 meshes with the third rack 700, and the fourth driven gear 501 drives the upper rail 2031 to continue to move in the same direction.

[0058] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. It should be pointed out that a person skilled in the art can make several improvements and modifications without departing from the technical principle of the present invention, and these improvements and modifications should also be regarded as within the protection scope of the present invention.

Claims

1. A high-precision narrow heavy-duty fork, Features: The heavy-duty fork comprises a driving mechanism and at least two sets of fork arms that can be telescopic in both directions, wherein the driving mechanism is used to drive the fork arms to telescopic in both directions; The fork arm comprises a base assembly, a middle rail assembly and an upper rail assembly, wherein the middle rail assembly is arranged on the upper part of the base assembly, the upper rail assembly is arranged on the upper part of the middle rail assembly, the base assembly is provided with a first gear assembly and a first rack, the middle rail assembly is provided with a second gear assembly and a second rack, and the lower part of the upper rail assembly is provided with a third rack, the first gear assembly is meshed with the second rack, and the second gear assembly is respectively meshed with the first rack and the third rack; The driving mechanism engages the first gear assembly with the second rack to drive the middle rail assembly to move left or right, the second gear assembly engages with the first rack, the second gear assembly rotates when the middle rail assembly moves, and the second gear assembly engages with the third rack to drive the upper rail assembly to move left or right.

2. A high-precision narrow heavy-duty fork according to claim 1, Features: The base assembly includes two symmetrically arranged base upright plates, a plurality of base mounting plates, a plurality of first clamping plates and a plurality of first pin shaft spacer sets, the two base upright plates are arranged on the upper part of the base mounting plates, the first pin shaft spacer set is arranged between the two base upright plates, the first clamping plate is arranged between the two base upright plates, the first pin shaft spacer set and the first clamping plate are both used to connect and fix the two base upright plates, and the first gear assembly is arranged between the two base upright plates through the first pin shaft spacer set; A plurality of first bearing followers and a plurality of first guide limit blocks are arranged on opposite sides of the two base plates, a first limit block is arranged at one end of the inner side of one base plate, a second limit block is arranged at one end of the inner side of the other base plate away from the first limit block, and a sensor is arranged on the inner side of the base plate.

3. A high-precision narrow heavy-duty fork according to claim 2, Features: The first gear assembly includes two symmetrically arranged gear fixing plates, a gear shaft, a first driven gear, a second driven gear, a plurality of third driven gears and a plurality of first transition gears, the gear shaft is arranged at the lower part of the two gear fixing plates, the first driven gear, the second driven gear, a plurality of third driven gears and a plurality of first transition gears are all arranged between the two gear fixing plates, the first driven gear is meshed with the gear shaft, the gear shaft is meshed with the second driven gear, the second driven gear is meshed with the third driven gear, and the first transition gear and the third driven gear are arranged at intervals.

4. A high-precision narrow heavy-duty fork according to claim 3, Features: A number of second clamping plates and a number of second pin shaft spacer kits are also arranged between the gear fixing plates, and the second clamping plates and the number of second pin shaft spacer kits are used to connect and fix the two gear fixing plates. A number of rack mounting plates are arranged at the lower part of the gear fixing plates, and the first rack is arranged at the upper part of the rack mounting plates.

5. A high-precision narrow heavy-duty fork according to claim 4, Features: The middle rail assembly includes a middle rail member, a first middle rail limit block, a second middle rail limit block and a trigger plate, wherein the first middle rail limit block is arranged on one side of one end of the lower part of the middle rail member, the second middle rail limit block is arranged on the other side of the other end of the lower part of the middle rail member, and the second rack is arranged at the lower part of the middle rail member; Two first slide grooves are arranged on both sides of the middle rail member, a second slide groove is arranged on the upper part of the middle rail member, and two third slide grooves are arranged on both sides of the second slide groove.

6. A high-precision narrow heavy-duty fork according to claim 5, Features: The second gear assembly includes a plurality of fourth driven gears and a plurality of second transition gears, and the plurality of the fourth driven gears and the plurality of the second transition gears are arranged at intervals.

7. A high-precision narrow heavy-duty fork according to claim 6, Features: The upper rail assembly comprises an upper rail member, a plurality of second bearing followers and a plurality of second guide limit blocks, wherein the plurality of second bearing followers and the plurality of second guide limit blocks are arranged on both sides of the upper rail member, and the third rack is arranged at the lower part of the upper rail member.

8. A high-precision narrow heavy-duty fork according to claim 7, Features: The driving mechanism comprises a servo motor, a reducer and a driving gear. The output end of the servo motor is connected to the reducer, the output end of the reducer is connected to the driving gear, and the driving gear is meshed with the first driven gear.

9. A high-precision narrow heavy-duty fork according to claim 8, Features: The upper rail member is arranged as a "T" shaped upper rail member.

Images