Double-stroke material carrying device

Abstract

The utility model discloses a double-stroke material carrying device, and relates to the technical field of material conveying. Sliding assemblies are arranged between an upper fork and a middle fork and between the middle fork and a lower fork of the device respectively, so that the upper fork is in sliding connection with the middle fork in the X-axis direction, the middle fork is in sliding connection with the lower fork in the X-axis direction, and a linkage mechanism is used for synchronously driving the upper fork to slide in the middle fork in the X-axis direction when the middle fork slides in the lower fork in the X-axis direction. The stable sliding of the upper fork on the middle fork in the X-axis direction and the stable sliding of the middle fork on the lower fork in the X-axis direction are achieved through the sliding assembly, shaking among the upper fork, the middle fork and the lower fork in the sliding process is effectively avoided, the transmission stability and the transmission accuracy are greatly improved, and when the middle fork slides on the lower fork in the X-axis direction, the transmission efficiency is greatly improved. The linkage mechanism synchronously drives the upper fork to slide in the middle fork in the X-axis direction, linkage of the upper fork, the middle fork and the lower fork is achieved at low cost, the cost of the whole machine is greatly reduced, and economic applicability is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of material transmission, in particular to a double-stroke material handling device. Background Art

[0002] The stacker is the core equipment of the automated warehouse, and the fork is the most important device for the stacker to store and retrieve goods. The fork is used to store, retrieve and transport goods. The existing fork is mainly composed of a top fork, a middle fork, a bottom fork and a load-bearing mechanism. The load-bearing mechanism is used to store, retrieve and transport large-sized and heavy goods. However, the load-bearing mechanism needs to be equipped with special weighing steel and a steel rail that is connected to the load-bearing rail needs to be set in the shelf, resulting in the high cost and complex structure of the entire fork. When this type of fork is used for small-sized and light-weight transportation, the powerful load-bearing and large-sized cargo-carrying capabilities of this type of fork are wasted, and the economic applicability is not high.

[0003] In addition, the existing forks also use a rail structure to achieve the linkage of the top fork, middle fork and bottom fork. However, due to its structure, this type of fork is prone to shaking between the top fork, middle fork and bottom fork during transmission, resulting in poor transmission stability and difficulty in meeting stable and accurate transmission.

[0004] Therefore, a dual-stroke material handling device is urgently needed to solve the above-mentioned defects. Utility Model Content

[0005] The purpose of the utility model is to provide a double-stroke material handling device, which realizes the stable sliding of the upper fork on the middle fork along the X-axis direction and the stable sliding of the middle fork on the lower fork along the X-axis direction through a sliding component, effectively avoiding the shaking between the upper fork, the middle fork and the lower fork during the sliding process, greatly improving the transmission stability and transmission accuracy, and when the middle fork slides on the lower fork along the X-axis direction, the upper fork is synchronously driven to slide on the middle fork along the X-axis direction through a linkage mechanism, and the linkage of the upper fork, the middle fork and the lower fork is realized at a low cost, which greatly reduces the cost of the whole machine and improves economic applicability.

[0006] In order to achieve the above-mentioned purpose, the utility model discloses a double-stroke material handling device, which includes an upper fork, a middle fork, a lower fork, a sliding assembly, a transmission mechanism and a linkage mechanism. The upper fork, the middle fork and the lower fork are slidably connected in sequence from top to bottom along the X-axis direction. Sliding assemblies are respectively provided between the upper fork and the middle fork, and between the middle fork and the lower fork, so that the upper fork is slidably connected to the middle fork along the X-axis direction, and the middle fork is slidably connected to the lower fork along the X-axis direction. The transmission mechanism is used to drive the middle fork to slide on the lower fork along the X-axis direction, and the linkage mechanism is used to synchronously drive the upper fork to slide on the middle fork along the X-axis direction when the middle fork slides on the lower fork along the X-axis direction.

[0007] Compared with the prior art, the utility model provides a sliding assembly and a linkage mechanism, wherein sliding assemblies are respectively provided between the upper fork and the middle fork, and between the middle fork and the lower fork, so that the upper fork can be slidably connected to the middle fork along the X-axis direction, and the middle fork can be slidably connected to the lower fork along the X-axis direction. The transmission mechanism is used to drive the middle fork to slide on the lower fork along the X-axis direction, and the linkage mechanism is used to synchronously drive the upper fork to slide on the middle fork along the X-axis direction when the middle fork slides on the lower fork along the X-axis direction. On the one hand, it realizes the stable sliding of the upper fork on the middle fork along the X-axis direction and the stable sliding of the middle fork on the lower fork along the X-axis direction through the sliding assembly, effectively avoiding the shaking between the upper fork, the middle fork and the lower fork during the sliding process, and greatly improving the transmission stability and transmission accuracy; on the other hand, when the middle fork slides on the lower fork along the X-axis direction, the upper fork is synchronously driven to slide on the middle fork along the X-axis direction through the linkage mechanism, and the linkage of the upper fork, the middle fork and the lower fork is realized at low cost, which greatly reduces the cost of the whole machine and improves economic applicability.

[0008] Preferably, the sliding assembly includes a sliding mounting plate and a rolling assembly mounted on the sliding mounting plate, the lower fork and the middle fork are respectively provided with guide grooves along the X-axis direction for the rolling assembly to be embedded and rolled, the rolling assembly includes a plurality of first cam followers arranged at intervals along the X-axis direction, the rotating shaft of the first cam followers is connected to the sliding mounting plate along the Y-axis direction, and the rollers of a part of the plurality of first cam followers arranged at intervals along the X-axis direction roll against the upper inner wall of the guide groove, and the rollers of the remaining part roll against the lower inner wall of the guide groove.

[0009] Specifically, the distance between the upper inner wall and the lower inner wall of the guide groove is greater than the roller diameter of the first cam follower.

[0010] Preferably, the rolling assembly also includes a plurality of second cam followers arranged at intervals along the X-axis direction, the sliding mounting plate is provided with first mounting notches for embedding and installing the second cam followers at intervals along the X-axis direction, the rotating shaft of the second cam follower is connected to the sliding mounting plate along the Z-axis direction, and the roller of the second cam follower rolls against the side wall of the upper fork / middle fork or the guide groove.

[0011] Preferably, the transmission mechanism includes a transmission rack, a driving shaft, a driving wheel, a driven shaft, a driven wheel, a transmission bar, a driving member, a first helical gear and a second helical gear, the transmission rack is installed on the lower surface of the lower fork along the X-axis direction, the driving shaft and the driven shaft are respectively arranged below the lower fork along the Y-axis direction at intervals, the driving wheel is sleeved on the driving shaft, the driven wheel is sleeved on the driven shaft, the transmission bar meshes with the driving wheel and the driven wheel in sequence, the driving member is used to drive the driving shaft to rotate around its axis to drive the driving wheel and the driven wheel to rotate synchronously, the lower surface of the transmission rack is provided with helical teeth along the X-axis direction, the first helical gear is sleeved on the driving shaft and meshed with the helical teeth of the transmission rack, the second helical gear is sleeved on the driven shaft and meshed with the helical teeth of the transmission rack.

[0012] Preferably, the transmission mechanism further comprises a tensioning wheel and a mounting portion, wherein the mounting portion is mounted on the lower surface or external structure of the lower fork, the tensioning wheel is mounted on the mounting portion in an adjustable manner in height along the Z-axis direction, and the tensioning wheel engages with the transmission bar.

[0013] Preferably, the linkage mechanism includes a first linkage component and / or a second linkage component, and it is assumed that the upper fork, the middle fork and the lower fork are in an initial state when they are superimposed and overlapped, and when the middle fork slides to the left on the lower fork along the X-axis direction from the initial state, the first linkage component synchronously drives the upper fork to slide to the left on the middle fork along the X-axis direction; when the middle fork slides to the right on the lower fork along the X-axis direction back to the initial state, the second linkage component synchronously drives the upper fork to slide to the right on the lower fork along the X-axis direction back to the initial state; when the middle fork slides to the right on the lower fork along the X-axis direction from the initial state, the second linkage component synchronously drives the upper fork to slide to the right on the middle fork along the X-axis direction; when the middle fork slides to the left on the lower fork along the X-axis direction back to the initial state, the first linkage component synchronously drives the upper fork to slide to the left on the lower fork along the X-axis direction back to the initial state.

[0014] Specifically, the first linkage assembly includes a first tensioning seat, a first linkage shaft, a first linkage wheel, a second tensioning seat and a first linkage bar. The first tensioning seat is arranged on the upper surface of the left end of the lower fork along the X-axis direction, the second tensioning seat is arranged on the lower surface of the left end of the upper fork along the X-axis direction, the middle fork is provided with a second installation notch at the right end along the X-axis direction, the first linkage shaft is installed in the second installation notch along the Y-axis direction, the first linkage wheel is rotatably installed in the second installation notch through the first linkage shaft, the first linkage bar engages with the first linkage wheel, and one end of the first linkage bar is connected to the first tensioning seat, and the other end is connected to the second tensioning seat.

[0015] Preferably, the second linkage assembly includes a third tensioning seat, a second linkage shaft, a second linkage wheel, a fourth tensioning seat and a second linkage bar, the third tensioning seat is arranged on the upper surface of the right end of the lower fork along the X-axis direction, the fourth tensioning seat is arranged on the lower surface of the right end of the upper fork along the X-axis direction, the middle fork is provided with a third installation notch at the left end along the X-axis direction, the second linkage shaft is installed in the third installation notch along the Y-axis direction, the second linkage wheel is rotatably installed in the third installation notch through the second linkage shaft, the second linkage bar engages with the second linkage wheel, and one end of the second linkage bar is connected to the third tensioning seat, and the other end is connected to the fourth tensioning seat.

[0016] Preferably, the double-stroke material handling device further comprises a support column, and the lower fork is erected on the working plane through the support column. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural schematic diagram of the double-stroke material handling device of the utility model in an initial state;

[0018] Figure 2 for Figure 1 Cross-sectional view after removing the sliding assembly on one side;

[0019] Figure 3 for Figure 1 Cross-sectional view after removing the sliding assembly on the other side;

[0020] Figure 4 for Figure 3 A schematic diagram of the structure when the middle fork and the upper fork move leftward along the X-axis direction;

[0021] Figure 5 It is an exploded view of the L-shaped guide plate, lower fork, tension seat, transmission mechanism and support column of the utility model;

[0022] Figure 6 It is an exploded view of the L-shaped guide plate, linkage wheel, middle fork and sliding assembly of the utility model;

[0023] Figure 7 It is an exploded view of the driving shaft (driven shaft), the driving wheel (driven wheel), and the first helical gear (second helical gear) in the transmission mechanism of the utility model;

[0024] Figure 8 It is an exploded view of the first linkage rotating shaft (second linkage rotating shaft), the first linkage wheel (second linkage wheel), the mounting seat, the fixing part, and the anti-rotation end cover of the utility model;

[0025] Fig. 9 It is a schematic diagram of the relationship between the rolling assembly and the guide groove of the utility model. DETAILED DESCRIPTION

[0026] The present invention is further described in detail below by specific embodiments in conjunction with the accompanying drawings. Wherein similar elements in different embodiments adopt associated similar element numbers. In the following embodiments, many detailed descriptions are intended to enable the present application to be better understood. However, those skilled in the art can easily recognize that some of the features can be omitted in different situations, or can be replaced by other elements, materials, and methods. In some cases, some operations related to the present application are not shown or described in the specification, in order to avoid the core part of the present application being overwhelmed by too much description, and for those skilled in the art, it is not necessary to describe these related operations in detail, and they can fully understand the related operations based on the description in the specification and the general technical knowledge in the art.

[0027] In addition, the features, operations or characteristics described in the specification can be combined in any appropriate manner to form various implementations. At the same time, the steps or actions in the method description can also be interchanged or adjusted in a manner that is obvious to those skilled in the art. Therefore, the various sequences in the specification and the drawings are only for the purpose of clearly describing a certain embodiment and are not meant to be a required sequence, unless otherwise specified that a certain sequence must be followed.

[0028] The serial numbers of the components in this document, such as "first", "second", etc., are only used to distinguish the objects described and do not have any order or technical meaning. The "connection" and "coupling" mentioned in this application, unless otherwise specified, include direct and indirect connections (couplings).

[0029] Please refer to Figure 1-Figure 9 The double-stroke material handling device of this embodiment includes an upper fork 10, a middle fork 20, a lower fork 30, a sliding assembly 40, a transmission mechanism 50 and a linkage mechanism. The upper fork 10, the middle fork 20 and the lower fork 30 are slidably connected in sequence from top to bottom along the X-axis direction. It can be understood that the upper fork 10, the middle fork 20 and the lower fork 30 here are plate-like structures with the same or similar sizes. When the double-stroke material handling device is in an initial state, the upper fork 10, the middle fork 20 and the lower fork 30 are superimposed and overlapped. At this time, the projections of the upper fork 10, the middle fork 20 and the lower fork 30 along the Z-axis direction overlap with each other.

[0030] Sliding assemblies 40 are respectively provided between the upper fork 10 and the middle fork 20, and between the middle fork 20 and the lower fork 30, so that the upper fork 10 can slide along the X-axis direction to connect with the middle fork 20, and the middle fork 20 can slide along the X-axis direction to connect with the lower fork 30. The transmission mechanism 50 is used to drive the middle fork 20 to slide along the X-axis direction on the lower fork 30, and the linkage mechanism is used to synchronously drive the upper fork 10 to slide along the X-axis direction on the middle fork 20 when the middle fork 20 slides along the X-axis direction on the lower fork 30. Here, the X-axis direction includes sliding to the left along the X-axis direction and sliding to the right along the X-axis direction. Figure 4 The diagram shows a state where the upper fork 10 and the middle fork 20 slide leftward along the X-axis direction.

[0031] Preferably, the sliding assembly 40 includes a sliding mounting plate 41 and a rolling assembly mounted on the sliding mounting plate 41, and the lower fork 30 and the middle fork 20 are respectively provided with guide grooves 1 for the rolling assembly to be embedded and rolled along the X-axis direction. Specifically, the lower fork 30 and the middle fork 20 are respectively provided with guide grooves 1 on both sides along the Y-axis direction, and the guide grooves 1 on both sides of the lower fork 30 and the middle fork 20 along the Y-axis direction correspond to one sliding assembly 40 respectively, so as to ensure the stability of the middle fork 20 and the upper fork 10 when they move along the X-axis direction. Further, the lower fork 30 and the middle fork 20 are respectively provided with L-shaped guide plates 2 on both sides along the Y-axis direction, and the vertical surface of the L-shaped guide plate 2 is erected on the edge of the lower fork 30 / middle fork 20 along the X-axis direction, and the horizontal surface, vertical surface, and upper surface of the lower fork 30 / middle fork 20 of the L-shaped guide plate 2 together form the guide groove 1.

[0032] The rolling assembly includes a plurality of first cam followers 421 arranged at intervals along the X-axis direction, the rotation axes of the first cam followers 421 are connected to the sliding mounting plate 41 along the Y-axis direction, and the rollers of a portion of the plurality of first cam followers 421 arranged at intervals along the X-axis direction roll against the upper inner wall of the guide groove 1 (i.e., abut against the lower surface of the transverse surface of the L-shaped guide plate 2), and the rollers of the remaining portion roll against the lower inner wall of the guide groove 1 (i.e., abut against the upper surface of the lower fork 30 / middle fork 20). At this time, the connecting lines of the rotation centers of all the first cam followers 421 in the same guide groove 1 are not on the same straight line.

[0033] At this time, the distance between the upper inner wall and the lower inner wall of the guide groove 1 is greater than the roller diameter of the first cam follower 421, so that all the first cam followers 421 in the same guide groove 1 can abut against the upper inner wall and the lower inner wall of the guide groove 1 along the up and down directions, effectively avoiding the jamming and shaking problems caused by the cam followers abutting against the upper inner wall and the lower inner wall of the guide groove 1 at the same time in the traditional guide structure, thereby greatly improving the transmission smoothness and transmission accuracy.

[0034] Preferably, the rolling assembly also includes a plurality of second cam followers 422 arranged at intervals along the X-axis direction, the sliding mounting plate 41 is provided with first mounting notches 411 for the second cam followers 422 to be embedded and installed at intervals along the X-axis direction, the rotating axis of the second cam follower 422 is connected to the sliding mounting plate 41 along the Z-axis direction, and the roller of the second cam follower 422 rolls against the side wall of the upper fork 10 / middle fork 20 or the guide groove 1. Specifically, the roller of the second cam follower 422 in this embodiment specifically abuts against the upper surface of the transverse surface of the L-shaped guide plate 2.

[0035] It can be understood that the present embodiment further improves the transmission stability of the double-stroke material handling device of the present embodiment by adding a plurality of second cam followers 422 arranged at intervals along the X-axis direction to guide the movement of the upper fork 10 and the middle fork 20 in the X-axis direction, and the second cam followers 422 are distributed to both ends of the upper fork 10 / middle fork 20 along the X-axis direction, so that the upper fork 10 / middle fork 20 can slide to the farthest end along the X-axis direction and can also perform stable transmission, which greatly meets the high-precision transmission requirements.

[0036] Preferably, the transmission mechanism 50 includes a transmission rack 51, a driving shaft 52, a driving wheel 53, a driven shaft 54, a driven wheel 55, a transmission bar 56, a driving member (not shown), a first bevel gear 58 and a second bevel gear 59, and the driving member includes but is not limited to a motor and a cylinder. Specifically, the driving wheel 53 and the driven wheel 55 are sprocket wheels, and in this case, the transmission bar 56 corresponds to a transmission chain. Of course, in other preferred embodiments, the driving wheel 53 and the driven wheel 55 can be rollers, and in this case, the transmission bar 56 corresponds to a belt.

[0037] The transmission rack 51 is installed on the lower surface of the lower fork 30 along the X-axis direction, the driving shaft 52 and the driven shaft are respectively arranged below the lower fork 30 along the Y-axis direction at intervals, the driving wheel 53 is sleeved on the driving shaft 52, the driven wheel 55 is sleeved on the driven shaft 54, the transmission bar 56 meshes with the driving wheel 53 and the driven wheel 55 in sequence, the driving member is used to drive the driving shaft 52 to rotate around its axis to drive the driving wheel 53 and the driven wheel 55 to rotate synchronously, the lower surface of the transmission rack 51 is provided with helical teeth 501 along the X-axis direction, the first helical gear 58 is sleeved on the driving shaft 52 and meshed with the helical teeth 501 of the transmission rack 51, the second helical gear 59 is sleeved on the driven shaft 54 ​​and meshed with the helical teeth 501 of the transmission rack 51.

[0038] Furthermore, the driving shaft 52 is also sleeved with a sleeve 3, which is located between the driving wheel 53 and the first bevel gear 58 to prevent interference between the driving wheel 53 and the first bevel gear 58. Similarly, the driven shaft 54 ​​is also sleeved with a sleeve 3, which is located between the driven wheel 55 and the second bevel gear 59 to prevent interference between the driven wheel 55 and the second bevel gear 59.

[0039] It can be understood that the purpose of the present embodiment to transmit the transmission rack 51 through the synchronously rotating driving wheel 53 and the driven wheel 55 is to maintain the synchronization of the driving wheel 53 and the driven wheel 55 to ensure that the two are in phase. When the two are in phase, even if the transmission rack 51 occasionally disengages from any set of driven wheels, it can be ensured that the transmission rack 51 can remain stable when re-engaging with the two driven wheels, effectively avoiding jamming and damage caused by stuck teeth.

[0040] Preferably, the transmission mechanism 50 further includes a tensioning wheel 510 and a mounting portion 511, wherein the mounting portion 511 is mounted on the lower surface of the lower fork 30, and the tensioning wheel 510 is mounted on the mounting portion 511 in an adjustable manner along the Z-axis direction, and the tensioning wheel 510 engages the transmission bar 56. By adjusting the height of the tensioning wheel 510 along the Z-axis direction, it is ensured that the tension of the transmission bar 56 meets the transmission requirements. Of course, in other preferred embodiments, the mounting portion 511 is also mounted on an external structure (such as an external mechanism or an external support).

[0041] Preferably, the linkage mechanism includes a first linkage component and a second linkage component. When the middle fork 20 slides to the left on the lower fork 30 along the X-axis direction from the initial state, the first linkage component synchronously drives the upper fork 10 to slide to the left on the middle fork 20 along the X-axis direction; when the middle fork 20 slides to the right on the lower fork 30 along the X-axis direction back to the initial state, the second linkage component synchronously drives the upper fork 10 to slide to the right on the lower fork 30 along the X-axis direction back to the initial state; when the middle fork 20 slides to the right on the lower fork 30 along the X-axis direction from the initial state, the second linkage component synchronously drives the upper fork 10 to slide to the right on the middle fork 20 along the X-axis direction; when the middle fork 20 slides to the left on the lower fork 30 along the X-axis direction back to the initial state, the first linkage component synchronously drives the upper fork 10 to slide to the left on the lower fork 30 along the X-axis direction back to the initial state.

[0042] It can be understood that the farthest ends of the middle fork 20 to the left and right along the X-axis direction are determined by the effective length of the transmission rack 51, and the farthest ends of the upper fork 10 to the left and right along the X-axis direction are determined by the effective length of the transmission rack 51, and since the upper fork 10 and the middle fork 20 are interlocked and slide, the maximum stroke of the upper fork 10 to the left / right along the X-axis direction is twice the maximum stroke of the middle fork 20 to the left / right along the X-axis direction. Therefore, the dual-stroke material handling device of this embodiment can achieve a transmission stroke of twice the effective length of the transmission rack 51, which can meet the requirement of achieving the maximum transmission stroke on a small-volume device.

[0043] Specifically, the first linkage assembly includes a first tensioning seat 611, a first linkage shaft 612, a first linkage wheel 613, a second tensioning seat 614 and a first linkage bar 615. The first tensioning seat 611 is arranged on the upper surface of the left end of the lower fork 30 along the X-axis direction, the second tensioning seat 614 is arranged on the lower surface of the left end of the upper fork 10 along the X-axis direction, and the middle fork 20 is provided with a second installation notch 21 at the right end along the X-axis direction. The first linkage shaft 612 is installed in the second installation notch 21 along the Y-axis direction. The first linkage wheel 613 is rotatably installed in the second installation notch 21 through the first linkage shaft 612. The first linkage bar 615 engages with the first linkage wheel 613, and one end of the first linkage bar 615 is connected to the first tensioning seat 611, and the other end is connected to the second tensioning seat 614. Preferably, a mounting seat 4 is provided in the second mounting notch 21, and the first linkage shaft 612 is installed in the second mounting notch 21 through the mounting seat 4. The first linkage shaft 612 is also sleeved with two shaft sleeves 3, and the first linkage wheel 613 is located between the two shaft sleeves 3. The two shaft sleeves 3 are used to eliminate the gaps on both sides of the first linkage wheel 613 to prevent the first linkage wheel 613 from moving due to the gaps. A fixing portion 401 is also provided on the mounting seat 4, and the anti-rotation end cap 5 fixes the first linkage shaft 612 and the fixing portion 401 respectively, effectively preventing the screws of the first linkage assembly from loosening due to rotation.

[0044] Preferably, the second linkage assembly includes a third tensioning seat 621, a second linkage shaft 622, a second linkage wheel 623, a fourth tensioning seat 624 and a second linkage bar 625, the third tensioning seat 621 is arranged on the upper surface of the right end of the lower fork 30 along the X-axis direction, the fourth tensioning seat 624 is arranged on the lower surface of the right end of the upper fork 10 along the X-axis direction, the middle fork 20 is provided with a third installation notch 22 at the left end along the X-axis direction, the second linkage shaft 622 is installed in the third installation notch 22 along the Y-axis direction, the second linkage wheel 623 is rotatably installed in the third installation notch 22 through the second linkage shaft 622, the second linkage bar 625 engages with the second linkage wheel 623, and one end of the second linkage bar 625 is connected to the third tensioning seat 621, and the other end is connected to the fourth tensioning seat 624. Preferably, a mounting seat 4 is provided in the third mounting notch 22, and the second linkage shaft 622 is installed in the third mounting notch 22 through the mounting seat 4. The second linkage shaft 622 is also sleeved with two shaft sleeves 3, and the second linkage wheel 623 is located between the two shaft sleeves 3. The two shaft sleeves 3 are used to eliminate the gaps on both sides of the second linkage wheel 623 to prevent the second linkage wheel 623 from moving due to the gaps. A fixing portion 401 is also provided on the mounting seat 4, and the anti-rotation end cap 5 fixes the second linkage shaft 622 and the fixing portion 401 respectively, effectively preventing the screws of the second linkage assembly from loosening due to rotation.

[0045] Furthermore, the linkage wheel involved in the linkage mechanism of this embodiment is a sprocket wheel, in which case the linkage bar corresponds to a chain. Of course, in other preferred embodiments, the main linkage wheel may be a roller, in which case the linkage bar corresponds to a belt. In addition, in other preferred embodiments, the linkage mechanism may only include the first linkage component or the second linkage component. When the linkage mechanism may only include the first linkage component, since the sprocket wheel can only be pulled but not pushed, when the middle fork 20 slides back to the initial state along the X-axis direction to the right on the lower fork 30, it is necessary to manually or use other driving devices to push the upper fork 10 to slide back to the initial state along the X-axis direction to the right on the lower fork 30; when the middle fork 20 slides back to the initial state along the X-axis direction to the left on the lower fork 30, it is necessary to manually or use other driving devices to push the upper fork 10 to slide back to the initial state along the X-axis direction to the left on the lower fork 30. When the linkage mechanism only includes the second linkage component, the reset method of the upper fork 10 is similar to the above, and will not be repeated here.

[0046] Preferably, the double-stroke material handling device further comprises a support column 70, and the lower fork 30 is erected on the working plane through the support column 70, so that the double-stroke material handling device of this embodiment can be stably placed on the work station.

[0047] Combination Figure 1-Figure 9 The utility model sets a sliding assembly 40 and a linkage mechanism, and a sliding assembly 40 is respectively provided between the upper fork 10 and the middle fork 20, and between the middle fork 20 and the lower fork 30, so that the upper fork 10 is slidably connected to the middle fork 20 along the X-axis direction, and the middle fork 20 is slidably connected to the lower fork 30 along the X-axis direction. The transmission mechanism 50 is used to drive the middle fork 20 to slide on the lower fork 30 along the X-axis direction. The linkage mechanism is used to synchronously drive the upper fork 10 to slide on the middle fork 20 along the X-axis direction when the middle fork 20 slides on the lower fork 30 along the X-axis direction. On the one hand, it is realized by the sliding assembly 40 The upper fork 10 can stably slide on the middle fork 20 along the X-axis direction, and the middle fork 20 can stably slide on the lower fork 30 along the X-axis direction, which effectively avoids the shaking between the upper fork 10, the middle fork 20 and the lower fork 30 during the sliding process, and greatly improves the transmission stability and transmission accuracy; on the other hand, when the middle fork 20 slides on the lower fork 30 along the X-axis direction, the linkage mechanism synchronously drives the upper fork 10 to slide on the middle fork 20 along the X-axis direction, and the linkage of the upper fork 10, the middle fork 20 and the lower fork 30 is realized at low cost, which greatly reduces the cost of the whole machine and improves economic applicability.

[0048] The above specific examples are used to illustrate the present invention, which are only used to help understand the present invention and are not intended to limit the present invention. For those skilled in the art of the present invention, some simple deductions, deformations or substitutions can be made based on the idea of ​​the present invention.

Claims

1. A dual-stroke material handling device, Features: The invention comprises an upper fork, a middle fork, a lower fork, a sliding assembly, a transmission mechanism and a linkage mechanism, wherein the upper fork, the middle fork and the lower fork are slidably connected in sequence from top to bottom along the X-axis direction, and sliding assemblies are respectively provided between the upper fork and the middle fork, and between the middle fork and the lower fork, so that the upper fork can be slidably connected to the middle fork along the X-axis direction, and the middle fork can be slidably connected to the lower fork along the X-axis direction, the transmission mechanism is used to drive the middle fork to slide on the lower fork along the X-axis direction, and the linkage mechanism is used to synchronously drive the upper fork to slide on the middle fork along the X-axis direction when the middle fork slides on the lower fork along the X-axis direction.

2. The dual-stroke material handling device according to claim 1, Features: The sliding assembly includes a sliding mounting plate and a rolling assembly installed on the sliding mounting plate, the lower fork and the middle fork are respectively provided with guide grooves along the X-axis direction for the rolling assembly to be embedded and rolled, the rolling assembly includes a plurality of first cam followers arranged at intervals along the X-axis direction, the rotating shaft of the first cam followers is connected to the sliding mounting plate along the Y-axis direction, and the rollers of a part of the plurality of first cam followers arranged at intervals along the X-axis direction roll against the upper inner wall of the guide groove, and the rollers of the remaining part roll against the lower inner wall of the guide groove.

3. The dual-stroke material handling device according to claim 2, Features: The distance between the upper inner wall and the lower inner wall of the guide groove is greater than the roller diameter of the first cam follower.

4. The dual-stroke material handling device according to claim 2, Features: The rolling assembly also includes a plurality of second cam followers arranged at intervals along the X-axis direction, the sliding mounting plate is provided with first mounting notches for the second cam followers to be embedded and installed at intervals along the X-axis direction, the rotating shaft of the second cam follower is connected to the sliding mounting plate along the Z-axis direction, and the roller of the second cam follower rolls against the side wall of the upper fork / middle fork or the guide groove.

5. The dual-stroke material handling device according to claim 1, Features: The transmission mechanism includes a transmission rack, a driving shaft, a driving wheel, a driven shaft, a driven wheel, a transmission bar, a driving member, a first helical gear and a second helical gear, the transmission rack is installed on the lower surface of the lower fork along the X-axis direction, the driving shaft and the driven shaft are respectively arranged below the lower fork along the Y-axis direction at intervals, the driving wheel is sleeved on the driving shaft, the driven wheel is sleeved on the driven shaft, the transmission bar meshes with the driving wheel and the driven wheel in sequence, the driving member is used to drive the driving shaft to rotate around its axis to drive the driving wheel and the driven wheel to rotate synchronously, the lower surface of the transmission rack is provided with helical teeth along the X-axis direction, the first helical gear is sleeved on the driving shaft and meshed with the helical teeth of the transmission rack, the second helical gear is sleeved on the driven shaft and meshed with the helical teeth of the transmission rack.

6. The dual-stroke material handling device according to claim 5, Features: The transmission mechanism also includes a tensioning wheel and a mounting portion, wherein the mounting portion is mounted on the lower surface or external structure of the lower fork, and the tensioning wheel is mounted on the mounting portion in an adjustable manner along the Z-axis direction, and the tensioning wheel engages with the transmission bar.

7. The dual-stroke material handling device according to claim 1, Features: The linkage mechanism includes a first linkage component and / or a second linkage component, and it is assumed that the upper fork, the middle fork and the lower fork are in an initial state when they are superimposed and overlapped. When the middle fork slides from the initial state to the left on the lower fork along the X-axis direction, the first linkage component synchronously drives the upper fork to slide to the left on the middle fork along the X-axis direction; when the middle fork slides to the right on the lower fork along the X-axis direction back to the initial state, the second linkage component synchronously drives the upper fork to slide to the right on the lower fork along the X-axis direction back to the initial state; when the middle fork slides from the initial state to the right on the lower fork along the X-axis direction, the second linkage component synchronously drives the upper fork to slide to the right on the middle fork along the X-axis direction; when the middle fork slides to the left on the lower fork along the X-axis direction back to the initial state, the first linkage component synchronously drives the upper fork to slide to the left on the lower fork along the X-axis direction back to the initial state.

8. The dual-stroke material handling device according to claim 7, Features: The first linkage component includes a first tensioning seat, a first linkage shaft, a first linkage wheel, a second tensioning seat and a first linkage bar. The first tensioning seat is arranged on the upper surface of the left end of the lower fork along the X-axis direction, the second tensioning seat is arranged on the lower surface of the left end of the upper fork along the X-axis direction, the middle fork is provided with a second installation notch at the right end along the X-axis direction, the first linkage shaft is installed in the second installation notch along the Y-axis direction, the first linkage wheel is rotatably installed in the second installation notch through the first linkage shaft, the first linkage bar engages with the first linkage wheel, and one end of the first linkage bar is connected to the first tensioning seat, and the other end is connected to the second tensioning seat.

9. The dual-stroke material handling device according to claim 7, Features: The second linkage assembly includes a third tensioning seat, a second linkage shaft, a second linkage wheel, a fourth tensioning seat and a second linkage bar. The third tensioning seat is arranged on the upper surface of the right end of the lower fork along the X-axis direction, and the fourth tensioning seat is arranged on the lower surface of the right end of the upper fork along the X-axis direction. The middle fork is provided with a third installation notch at the left end along the X-axis direction. The second linkage shaft is installed in the third installation notch along the Y-axis direction. The second linkage wheel is rotatably installed in the third installation notch through the second linkage shaft. The second linkage bar engages with the second linkage wheel, and one end of the second linkage bar is connected to the third tensioning seat, and the other end is connected to the fourth tensioning seat.

10. The dual-stroke material handling device according to claim 1, Features: It also includes a support column, and the lower fork is erected on the working plane through the support column.

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