A telescopic conveyor

Abstract

The present invention discloses a telescopic conveyor, comprising a fixed section and at least one telescopic section which are nested in sequence. A telescopic limiting mechanism is arranged between the telescopic section and the telescopic section or fixed section of the upper section, and the telescopic limiting mechanism is used to limit the movement of the telescopic section. The telescopic section is also provided with a movable locking mechanism, and the movable locking mechanism comprises a telescopic transmission part, a locking part, and a linkage part which are used in conjunction with each other; the telescopic transmission part is used to drive the telescopic movement of the telescopic section; the locking part comprises two locking members symmetrically arranged on both sides of the telescopic section, and the locking members are used to unlock or lock the telescopic section with the telescopic section or fixed section of the upper section; the linkage part is respectively connected with the telescopic transmission part and the locking part, so as to realize the linkage between the telescopic transmission part and the locking part. The telescopic conveyor of the present invention can effectively improve its telescopic stability, and can automatically lock it during its telescopic process to ensure the timeliness of locking.

Description

Technical Field

[0001] The present invention relates to the technical field of logistics sorting equipment, and in particular to a telescopic conveyor. Background Art

[0002] Telescopic conveyor is a common conveyor with telescopic mechanism added to it, so that the conveyor can be freely extended and retracted in the length direction, and the length of the conveyor can be controlled at any time. Telescopic conveyor can transport materials in both directions, and can be used in conjunction with other conveying equipment and material sorting systems to realize the automated production of material storage or vehicle loading and unloading, and has been widely used in various industries.

[0003] A telescopic conveyor usually includes a fixed section and at least one telescopic section which are nested in sequence. The telescopic section can telescope along the telescopic section or the fixed section of the previous section. However, during the movement of the telescopic section, as the size of the telescopic section changes, the telescopic section is prone to swing, resulting in unstable telescopic movement. In addition, the locking mechanism of the existing telescopic conveyor is unreasonably designed. After the telescopic section moves into place, it is difficult to lock it in time, which poses certain safety hazards. Summary of the invention

[0004] In order to overcome the above-mentioned shortcomings, the purpose of the present invention is to provide a telescopic conveyor which can effectively improve its telescopic stability and can automatically lock it during its telescopic process to ensure the timeliness of the locking.

[0005] In order to achieve the above purpose, the technical solution adopted by the present invention is: a telescopic conveyor, including a fixed section and at least one telescopic section which are nested in sequence, and the telescopic section can telescopically move along the telescopic section or fixed section of the previous section.

[0006] A telescopic limit mechanism is provided between the telescopic section and the telescopic section or fixed section of the previous section. The telescopic limit mechanism includes two sets of limit parts symmetrically arranged on both sides of the telescopic section. Each set of limit parts includes a side rail and a moving part used in conjunction. The side rail and the moving part are respectively arranged on the telescopic section, the telescopic section of the previous section or the fixed section to limit the movement of the telescopic section.

[0007] The telescopic section is also provided with a movable locking mechanism, which includes a telescopic transmission part, a locking part and a linkage part that are used in conjunction with each other; the telescopic transmission part is used to drive the telescopic movement of the telescopic section; the locking part includes two locking members symmetrically arranged on both sides of the telescopic section, and the locking members are used to unlock or lock the telescopic section with the telescopic section or fixed section of the previous section; the linkage part is respectively connected with the telescopic transmission part and the locking part to realize the linkage of the telescopic transmission part and the locking part.

[0008] The beneficial effects of the present invention are:

[0009] In the telescopic limiting mechanism, the side rails cooperate with the moving parts so that the moving parts can move synchronously along the side rails during the telescopic movement of the telescopic section, and then the side rails are used to limit the moving parts to suppress the swing of the telescopic section during the telescopic movement, thereby improving its movement stability; at the same time, by arranging limiting parts on both sides of the telescopic section, both sides of the telescopic section are limited at the same time, thereby further improving the movement stability of the telescopic section;

[0010] In the mobile locking mechanism, the telescopic movement of the telescopic section is realized by the telescopic transmission part, the unlocking or locking of the telescopic section is realized by the locking part, and the linkage between the telescopic transmission part and the locking part is realized by the setting of the linkage part, so that while the telescopic transmission part drives the telescopic section to move, the telescopic section can be unlocked or locked by the locking part to ensure the timeliness of unlocking or locking; by arranging two locking pieces in the locking part, the locking of the two sides of the telescopic section can be achieved respectively, thereby further improving the stability of the telescopic section when locked, and ensuring the safety and reliability of locking.

[0011] Furthermore, the linkage part includes a power plate and a linkage plate, and the power plate is fixedly connected to the telescopic transmission part; the linkage plate and the locking member are arranged one by one, and the linkage plate is pivotally connected to the telescopic section, and its two ends are respectively connected to the power plate and the corresponding locking member through a micro-shift structure.

[0012] When the power plate moves along the length direction of the telescopic section with the telescopic transmission part, the end of the linkage plate connected to the power plate is also subjected to the driving force along the length direction of the telescopic section. At this time, because the linkage plate is pivotally connected to the telescopic section, the linkage plate can immediately rotate along the telescopic section, and then the driving force on the linkage plate can be decomposed into the force along the width direction of the telescopic section to drive the locking member to move along the width direction of the telescopic section. The power plate and the telescopic transmission part are fixedly connected to realize the synchronous movement of the power plate and the telescopic transmission part; and the driving force of the telescopic transmission part on the linkage plate can be transmitted to the locking member through the connection between the linkage plate and the telescopic section, the power plate, and the locking member, so as to realize the movement of the locking member.

[0013] Furthermore, a limit slot is provided on the power plate, and the linkage plate is an L-shaped structure, the corner of which is pivotally connected to the telescopic section through a pin, and one end of which is installed in the limit slot through a micro-shift structure; when the linkage plate rotates along the pin until it abuts against the limit slot, the telescopic section is in an unlocked state. The setting of the limit slot can limit the movement range of the linkage plate.

[0014] Furthermore, the locking member includes a fixing sleeve, a locking shaft, and a spring. The fixing sleeve is fixedly installed on the telescopic section along the width direction of the telescopic section. The locking shaft is passed through the fixing sleeve and a spring is sleeved thereon. The two ends of the spring are respectively abutted against the locking shaft and the fixing sleeve.

[0015] In the initial state, the locking part is in a locked state and the spring is in a natural state; when the telescopic transmission part is subjected to a driving force along the length direction of the telescopic section, the power plate connected to the telescopic transmission part is immediately moved by the force, and drives the linkage plate to rotate along the telescopic section. At this time, one end of the linkage plate connected to the locking shaft immediately drives the locking shaft to move along the fixed sleeve in the direction close to the linkage part to unlock the telescopic section. The telescopic section can then be extended along its length direction. At this time, the spring is in a compressed state; when the telescopic section moves to the specified position, the driving force applied to the telescopic transmission part is removed. At this time, the spring is reset under the action of the elastic force, and drives the locking shaft to move along the fixed sleeve in the direction away from the linkage part to lock the telescopic section. At the same time, the linkage part connected to the locking shaft is immediately subjected to force, and drives the telescopic transmission part to link with it, so that the telescopic transmission part is reset.

[0016] The linkage between the telescopic transmission part and the locking part is achieved through the linkage part, so that only the driving force applied to the telescopic transmission part is required to realize the automatic unlocking of the telescopic section by the locking part and the telescopic movement of the telescopic section. By arranging a spring in the locking member, the elastic force of the spring can be utilized to realize the automatic locking of the telescopic section by the locking part when there is no external force driving the telescopic transmission part, thereby ensuring the timeliness of unlocking and locking.

[0017] Further, the side rail includes a slide groove arranged along the length direction of the telescopic section, and the slide groove is defined by a slide groove top wall, a slide groove bottom wall and a slide groove side wall; the moving part includes rollers arranged in a one-to-one correspondence with the side rails, and the roller includes a roller body located in the slide groove, and the radial dimension of the roller body is smaller than the spacing between the slide groove top wall and the slide groove bottom wall, and the axial dimension of the roller body is smaller than the depth dimension of the slide groove.

[0018] The cooperation between the side rails and the rollers can ensure the telescopic movement of the telescopic section by moving the rollers along the side rails, and at the same time, the upper and lower swinging of the telescopic section during the telescopic process can be suppressed by limiting the rollers by the top wall and the bottom wall of the slide groove: assuming that the rollers are arranged on the telescopic section, and the side rails are arranged on the telescopic section or the fixed section of the previous section, when the telescopic section is extended, the telescopic section located in the telescopic section or the fixed section of the previous section swings upward, and the rollers abut against the top wall of the slide groove, thereby suppressing the telescopic section from continuing to tilt upward. At the same time, in the process of the telescopic section continuing to extend, the rollers always move along the top wall of the slide groove, thereby reducing the friction resistance of the telescopic section during movement through rolling friction, making the extension of the telescopic section smoother; when the telescopic section is retracted When the telescopic section located in the upper section or the telescopic section in the fixed section swings downward, the roller immediately abuts against the bottom wall of the slide groove, thereby inhibiting the telescopic section from continuing to tilt downward. At the same time, in the process of the telescopic section continuing to retract, the roller always moves along the bottom wall of the slide groove, thereby making the retraction of the telescopic section smoother; and the radial dimension of the roller body is set to be smaller than the distance between the top wall and the bottom wall of the slide groove, so that a certain gap can be reserved between the roller body and the top wall or the bottom wall of the slide groove, so as to reserve a swing amplitude within a certain tolerance range for the telescopic section; and the axial dimension of the roller body is set to be smaller than the depth dimension of the slide groove, so that a certain gap can be reserved between the roller body and the side wall of the slide groove, so as to prevent the roller body from contacting the side wall of the slide groove.

[0019] Furthermore, a roller flange is coaxially arranged on one side of the roller body away from the slide groove, and a radial dimension of the roller flange is greater than a distance between a top wall and a bottom wall of the slide groove.

[0020] When the telescopic section swings left and right, since the radial size of the roller convex edge is greater than the distance between the top wall and the bottom wall of the slide groove, the roller convex edge can abut against the outside of the slide groove to limit the left and right movement of the roller, and then the cooperation of the roller convex edges of the two sets of limiting parts can be used to suppress the left and right swing of the telescopic section, thereby improving the stability of the telescopic section expansion and contraction. At the same time, the roller convex edge abuts against the outside of the slide groove, which can suppress the roller body from moving toward the side wall of the slide groove, thereby ensuring that the roller body will never touch the side wall of the slide groove during the movement of the roller body along the slide groove.

[0021] Furthermore, each set of limiting parts includes at least two side rails distributed up and down, and one of the side rails is arranged on the telescopic section, and the corresponding roller is arranged on the side of the telescopic section or the fixed section of the previous section facing the extension direction of the telescopic section. Another side rail is arranged on the telescopic section or the fixed section of the previous section, and the corresponding roller is arranged on the side of the telescopic section facing the retraction direction of the telescopic section. The cooperation of at least two side rails and rollers can enhance the limiting support function of the telescopic section, and further improve the stability of the movement of the telescopic section.

[0022] Furthermore, it also includes a compound angle adjustment mechanism arranged below the fixed section, the compound angle adjustment mechanism includes two groups of lifting mechanisms arranged along the length direction of the telescopic section, each group of lifting mechanisms includes at least one lifting push rod that can be lifted and moved, and the upper end of each lifting push rod is hinged to the fixed section; the two groups of lifting mechanisms are synchronized by a connecting rod mechanism, and the movement directions of the lifting push rods of the two groups of lifting mechanisms are opposite.

[0023] In the lifting mechanism, the lifting and lowering movement of the lifting push rod can apply an upward or downward force to the hinged portion of the fixed section and the lifting push rod, and the reverse movement of the lifting push rods of the two sets of lifting mechanisms allows one set of lifting mechanisms to apply an upward force to the conveyor while the other set of lifting mechanisms can apply a downward force to the conveyor, so as to achieve rapid adjustment of the inclination angle of the fixed section, and further achieve rapid adjustment of the inclination angle of the telescopic conveyor; the driving force of one set of lifting mechanisms can be transmitted to the other set of lifting mechanisms through the setting of the connecting rod mechanism, which not only ensures the synchronization of the operation of the two sets of lifting mechanisms, but also reduces power energy consumption; in addition, through the hinge of the two sets of lifting mechanisms and the fixed section, support for different parts of the fixed section can be achieved, thereby improving stable support for the telescopic conveyor during the tilting process.

[0024] Furthermore, the lifting mechanism also includes screw lifts corresponding to the lifting push rods, and all the screw lifts of each group of lifting mechanisms are connected through a transmission assembly to achieve synchronous and unidirectional operation. The screw lifts drive the lifting push rods to move up and down, and the transmission assembly realizes the synchronous and unidirectional operation of all the screw lifts of the same group of lifting mechanisms, thereby realizing the synchronous and unidirectional lifting of the lifting push rods of the same group of lifting mechanisms.

[0025] Further, the transmission assembly includes a driving wheel, a transmission wheel, and a tensioning wheel. The driving wheel is installed on the frame and is coaxially connected to a handwheel. The transmission wheel is arranged in a one-to-one correspondence with the screw lifter and is connected to the corresponding screw lifter. The tensioning wheel is installed on the frame. A closed-loop synchronous belt or synchronous chain is commonly wound around the driving wheel, the transmission wheel, and the tensioning wheel. The driving wheels of the two sets of lifting mechanisms are respectively installed on both sides of the frame, and the installation heights are different, so that the height positions of the corresponding two handwheels are different.

[0026] The setting of the handwheel makes it easy to manually apply force to rotate the driving wheel, and then drive the transmission wheel and the tension wheel to rotate through the synchronous belt or synchronous chain, so as to realize the operation of the screw lifter; the setting of the tension wheel can adjust the tightness of the synchronous belt or synchronous chain. Handwheels are set on both sets of lifting mechanisms to facilitate manual control at different positions. In addition, in actual application, operators usually sort goods on the ground or in the carriage, and setting the two handwheels at different heights can facilitate operators working on the ground or in the carriage to adjust the angle of the conveyor, further improving the operational flexibility of the angle adjustment. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a structural schematic diagram of a telescopic conveyor according to an embodiment of the present invention;

[0028] Figure 2 It is a structural schematic diagram of the back side of the telescopic section of an embodiment of the present invention;

[0029] Figure 3 This is a schematic diagram of the structure in which the telescopic limiting mechanism and the movable locking mechanism of an embodiment of the present invention are assembled on the back of the telescopic section;

[0030] Figure 4 It is a structural schematic diagram of a mobile locking mechanism according to an embodiment of the present invention;

[0031] Figure 5 Schematic diagram of the structure of the linkage part of an embodiment of the present invention;

[0032] Figure 6 is a cross-sectional schematic diagram of a locking portion according to an embodiment of the present invention;

[0033] Figure 7 It is a structural schematic diagram of a chute according to an embodiment of the present invention;

[0034] Figure 8 It is a structural schematic diagram of the back side of the fixed section of an embodiment of the present invention;

[0035] Fig. 9 It is a structural schematic diagram of a compound angle adjustment mechanism according to an embodiment of the present invention;

[0036] Fig.10 Schematic diagram of the structure of the lifting mechanism of the embodiment of the present invention.

[0037] In the figure:

[0038] 1-Fixed segment;

[0039] 2- telescopic section;

[0040] 31-side rail; 311-top wall of the slide; 312-bottom wall of the slide; 313-side wall of the slide; 32-roller; 321-roller body; 322-convex edge of the roller;

[0041] 41-telescopic transmission part; 42-locking part; 421-fixing sleeve; 422-locking shaft; 4221-guide cone head; 4222-annular convex part; 423-spring; 43-linkage part; 431-power plate; 4311-base plate; 4312-L-shaped bending plate; 432-linkage plate; 4331-waist-shaped hole; 4332-round hole; 4333-limiting rod;

[0042] 51-lifting mechanism; 511-lifting push rod; 512-screw lifter; 513-driving wheel; 514-transmission wheel; 515-tensioning wheel; 516-hand wheel; 52-connecting rod mechanism; 53-frame; 531-frame body; 532-guide bracket. DETAILED DESCRIPTION

[0043] The preferred embodiments of the present invention are described in detail below in conjunction with the accompanying drawings so that the advantages and features of the present invention can be more easily understood by those skilled in the art, thereby making a clearer and more definite definition of the protection scope of the present invention.

[0044] Example

[0045] See attached Figure 1-3 As shown, a telescopic conveyor of the present invention comprises a fixed section 1 and at least one telescopic section 2 which are nested in sequence, and the telescopic section 2 can telescopically move along the telescopic section 2 or the fixed section 1 of the previous section. A telescopic limiting mechanism is arranged between the telescopic section 2 and the telescopic section 2 or the fixed section 1 of the previous section, and the telescopic limiting mechanism comprises two sets of limiting parts symmetrically arranged on both sides of the telescopic section 2, and each set of limiting parts comprises a side rail 31 and a moving part used in conjunction with each other, and the side rail 31 and the moving part are respectively arranged on the telescopic section 2, the telescopic section 2 of the previous section or the fixed section 1, so as to limit the movement of the telescopic section 2. Through the cooperation between the side rail 31 and the moving part, the moving part can synchronously move along the side rail 31 during the telescopic movement of the telescopic section 2, and then the side rail 31 is used to limit the moving part to suppress the swing of the telescopic section 2 during the telescopic process, thereby improving its movement stability; at the same time, by arranging limiting parts on both sides of the telescopic section 2, the two sides of the telescopic section 2 are simultaneously limited, thereby further improving the movement stability of the telescopic section 2.

[0046] The telescopic section 2 is also provided with a mobile locking mechanism, which includes a telescopic transmission part 41, a locking part 42, and a linkage part 43 used in conjunction with each other. The telescopic transmission part 41 is used to drive the telescopic movement of the telescopic section 2; the locking part 42 includes two locking members symmetrically arranged on both sides of the telescopic section 2, and the locking members are used to unlock or lock the telescopic section 2 with the telescopic section 2 of the previous section or the fixed section 3; the linkage part 43 is respectively connected to the telescopic transmission part 41 and the locking part 42 to realize the linkage of the telescopic transmission part 41 and the locking part 42. In one embodiment, the locking member includes a fixing sleeve 421, a locking shaft 422, and a spring 423. The fixing sleeve 421 is fixed on the telescopic section 2 along the width direction of the telescopic section 2. The locking shaft 422 is passed through the fixing sleeve 421 and can move along the width direction of the telescopic section 2 to unlock or lock the telescopic section 2 with the previous section of the telescopic section 2 or the fixed section 1. The spring 423 is sleeved on the locking shaft 422, and its two ends are respectively abutted against the locking shaft 422 and the fixing sleeve 421.

[0047] In one embodiment, a plurality of locking holes are provided on both sides of the fixed section 1 or the telescopic section 2 along the length direction thereof, so as to lock the locking shaft 422 at different positions of the previous fixed section 1 or the telescopic section 2. Furthermore, the locking holes are waist-shaped holes.

[0048] In the initial state, the telescopic section 2 is in a locked state, and the spring 423 is in a natural state; when the telescopic transmission part 41 is subjected to a driving force along the length direction of the telescopic section 2, the linkage part 43 connected to the telescopic transmission part 41 is immediately subjected to force, and drives the locking part 42 to link, so that the locking shaft 422 can move along the width direction of the telescopic section 2 to unlock the telescopic section 2, and the telescopic section 2 is immediately extended along its length direction. At this time, the spring 423 is in a compressed state; when the telescopic section 2 moves to the specified position, the driving force applied to the telescopic transmission part 41 is removed. At this time, the spring 423 is reset under the action of elastic force, and drives the locking shaft 433 to move along the width direction of the telescopic section 2 to lock the telescopic section 2. At the same time, the linkage part 43 connected to the locking part 42 is immediately subjected to force, and drives the telescopic transmission part 41 to link, so that the telescopic transmission part 41 is reset.

[0049] In some embodiments, see Appendix Figure 4-5 As shown, the linkage part 43 includes a power plate 431 and a linkage plate 432 used in conjunction. The power plate 431 is fixedly connected to the telescopic transmission part 41. The linkage plate 432 is arranged in a one-to-one correspondence with the locking member, and the middle part of the linkage plate 432 is pivotally connected to the telescopic section 2, one end of which is connected to the power plate 431 through a micro-shift structure, and the other end is connected to the locking shaft 422 of the corresponding locking member through a micro-shift structure. The micro-shift structure includes a waist-shaped hole 4331, a round hole 4332 and a limit rod 4333, the waist-shaped hole 4331 is arranged on the linkage plate 432, the round hole 4332 is arranged on the power plate 431 or the locking shaft 422, and the limit rod 4333 is sequentially penetrated on the round hole 4332 and the waist-shaped hole 4331 in the vertical direction. The limit rod 4333 can rotate along the round hole 4332 and the waist-shaped hole 4331, and can slide along the waist-shaped hole 4331. The waist-shaped hole 4331 is provided so that the limiting rod 4333 can slide along the waist-shaped hole 4331 while rotating. It should be noted that both ends of the limiting rod 4333 are provided with a stopper to prevent it from slipping out of the waist-shaped hole 4331 or the round hole 4332. Exemplarily, the limiting rod 4333 can be a bolt.

[0050] When the power plate 431 moves along the length direction of the telescopic section 2 with the telescopic transmission part 41, the end of the linkage plate 432 connected to the power plate 431 is also subjected to the driving force along the length direction of the telescopic section 2. At this time, because the linkage plate 432 is pivotally connected to the telescopic section 2, the linkage plate 432 can immediately rotate along the telescopic section 2, and then the driving force on the linkage plate 432 can be decomposed into a force along the width direction of the telescopic section 2, so as to drive the locking member to move along the width direction of the telescopic section 2.

[0051] In some embodiments, the linkage plate 432 includes a No. 1 plate and a No. 2 plate which are arranged vertically and have an L-shaped structure. The junction of the No. 1 plate and the No. 2 plate is pivotally connected to the telescopic section 2 through a pin shaft, and the ends of the No. 1 plate and the No. 2 plate which are away from each other are respectively connected to the power plate 431 and the locking shaft 422.

[0052] The power plate 431 includes a base plate 4311 and an L-shaped bending plate 4312 integrally arranged at the upper end of the base plate 4311, and a limit groove is formed between the base plate 4311 and the L-shaped bending plate 4312 toward the retraction direction of the telescopic section 2. One end of the two linkage plates 432 connected to the power plate 431 is connected to the limit groove through a micro-shift structure. Specifically, two circular holes 4332 of the micro-shift structure are provided, and are respectively opened on the base plate 4311 and the L-shaped bending plate 4312. The ends of the two linkage plates 432 connected to the power plate 431 are stacked up and down, and the waist-shaped holes 4331 opened thereon are located in the limit groove, and the limit rod 4333 is sequentially penetrated on the circular hole 4332 of the base plate 4311, the waist-shaped hole 4331 of one linkage plate 432, the waist-shaped hole 4331 of another linkage plate 432, and the circular hole 4322 of the L-shaped bending plate. When the power plate 431 is subjected to driving force, the driving force can be simultaneously transmitted to the two linkage plates 432 through the limiting rod 4333 in the limiting groove, thereby realizing the synchronous action of the two locking members. When the linkage plate 432 is subjected to force and rotates along the telescopic section 2, when one end of the linkage plate 432 located in the limiting groove abuts against the limiting groove, the linkage plate 432 can be restrained from further rotating.

[0053] In some embodiments, when the locking portion 42 is in a locked state, plate No. 1 is neither perpendicular to the length direction of the telescopic section 2 nor perpendicular to the width direction of the telescopic section 2. At this time, when plate No. 1 is subjected to a driving force along the length direction of the telescopic section 2, plate No. 1 can rotate along the pin shaft and drive plate No. 2 to rotate synchronously, so that plate No. 2 can drive the locking shaft 422 to move and achieve unlocking; when the locking portion 42 is in an unlocked state, plate No. 1 abuts against the limiting groove and is perpendicular to the length direction of the telescopic section 2. At this time, plate No. 2 can be perpendicular to the width direction of the telescopic section 2. When plate No. 1 continues to be subjected to a driving force along the length direction of the telescopic section 2, due to the limitation of the limiting groove, plate No. 1 no longer rotates, and plate No. 1 and plate No. 2 are only subjected to a driving force along the length direction of the telescopic section 2 (the force along the width direction of the telescopic section 2 will not be decomposed), thereby avoiding the loss of driving force.

[0054] In some embodiments, see Appendix Figure 6As shown, the locking shaft 422 includes a shaft body, a guide cone head 4221 is provided at one end of the shaft body away from the linkage portion 43, and an annular protrusion 4222 is provided on the side wall of the shaft body for the spring 423 to abut. The setting of the guide cone head 4221 can facilitate the locking shaft 42 to be locked to the telescopic section 2 or the fixed section 1 of the previous section.

[0055] In some embodiments, the fixing sleeve 421 has a first shaft hole matching the radial size of the shaft body at one end facing the linkage portion 43, and a second shaft hole matching the outer diameter of the annular protrusion 4222 at the other end. The first shaft hole and the second shaft hole of different sizes are provided to ensure the normal movement of the locking shaft 422 and limit the movement range of the locking shaft 422 toward the linkage portion 43.

[0056] In some embodiments, the telescopic transmission part 41 includes a pull rope, one end of which is fixed to the power plate 431, and the other end is connected to a hand handle. The telescopic section 2 is provided with at least one guide hole or guide groove for the pull rope to pass through. The setting of the guide hole or guide groove can not only support the pull rope, but also limit the moving direction of the pull rope.

[0057] When the pull rope is pulled, the action of the mobile locking mechanism is divided into two steps: the first step is that the pull rope pulls the power plate 431, and the linkage plate 432 then rotates along the pin shaft (the position where the linkage plate 432 and the telescopic section 2 are pivoted), and drives the locking shaft 422 to move along the width direction of the telescopic section 2 until the locking shaft 422 leaves the locking hole, and the telescopic section 2 is unlocked from the telescopic section 2 of the previous section or the fixed section 1. In this process, only the unlocking action of the locking shaft 422 occurs, and the telescopic section 2 does not extend; the second step is that after the telescopic section 2 is unlocked, the linkage plate 432 abuts against the limiting groove of the power plate 431 , the linkage plate 432 no longer rotates. At this time, as the pull rope continues to pull the power plate 431, the linkage plate 432 can apply a force to the locking shaft 422 along the length direction of the telescopic section 2, so that the locking shaft 422 and the fixing sleeve 421 are both subjected to a force along the length direction of the telescopic section 2. Since the fixing sleeve 421 is fixed on the telescopic section 2, the fixing sleeve 421 can then apply a force to the telescopic section 2 along the length direction of the telescopic section 2 to realize the extension movement of the telescopic section 2. In this process, the telescopic section 2 is always in an unlocked state. At this time, only the extension movement of the telescopic section 2 occurs.

[0058] In some embodiments, see Appendix Figure 2 , 7As shown in Figures 8 and 9, the side rail 31 includes a slide groove arranged along the length direction of the telescopic section 2, and the slide groove defines a slide groove top wall 311, a slide groove bottom wall 312 and a slide groove side wall 313. The moving part includes a roller 32 arranged one-to-one with the side rail 31. The roller 32 includes a roller body 321 located in the slide groove, and a roller flange 322 integrally formed with the roller body 321 is coaxially arranged on a side away from the slide groove. The radial dimension of the roller flange 322 is greater than the distance between the slide groove top wall 311 and the slide groove bottom wall 312. When the roller 32 is arranged on the telescopic section 2, the corresponding side rail 31 is arranged on the telescopic section 2 or the fixed section 1 of the previous section; when the side rail 31 is arranged on the telescopic section 2, the corresponding roller 32 is arranged on the telescopic section 2 or the fixed section 1 of the previous section.

[0059] Exemplarily, when the roller 32 is arranged on the telescopic section 2, the corresponding side rail 31 is arranged on the telescopic section 2 or the fixed section 1 of the previous section. When the telescopic section 2 is extended, as the extended part gradually increases, the center of gravity of the telescopic section 2 can be located outside the telescopic section 2 or the fixed section 1 of the previous section. At this time, under the action of its own weight, the telescopic section 2 tilts so that the extended part swings downward and the part located in the telescopic section 2 or the fixed section 1 of the previous section swings upward. At this time, the roller 32 arranged on the telescopic section 2 moves upward and abuts against the top wall 311 of the slide groove. Since the slide groove is fixedly arranged on the telescopic section 2 or the fixed section 1 of the previous section, the position of the top wall 311 of the slide groove is fixed. Therefore, the top wall 311 of the slide groove can limit the roller 32, thereby inhibiting the continued tilting of the telescopic section 2; in the subsequent process of extending the telescopic section 2, the roller 311 always abuts against the top wall 311 of the slide groove, thereby ensuring that the inclination of the telescopic section 2 does not increase.

[0060] When the telescopic section 2 is retracted, as the retracted part gradually increases, the center of gravity of the telescopic section 2 will be located in the telescopic section 2 of the previous section or the fixed section 1. At this time, under the action of its own weight, the telescopic section 2 tilts to make the part in the telescopic section 2 or the fixed section 1 of the previous section swing downward. At this time, the roller 32 arranged on the telescopic section 2 moves downward and abuts against the bottom wall 312 of the slide groove. The bottom wall 312 of the slide groove can limit the roller 32, thereby inhibiting the further tilting of the telescopic section 2; in the subsequent retraction process of the telescopic section 2, the roller 32 always abuts against the bottom wall 312 of the slide groove, thereby ensuring that the inclination of the telescopic section 2 does not increase. When the telescopic section 2 swings left and right during the telescopic process, the roller convex edge 322 can abut against the outer side of the slide groove (i.e., the inner side wall of the telescopic section 2 or the fixed section 1 of the previous section) to limit the roller convex edge 322. The cooperation of the two sets of limiting parts of the roller convex edges 322 can suppress the left and right swing of the telescopic section 2, thereby improving the stability of the telescopic section 2 in telescopic extension and retraction.

[0061] In some embodiments, see Appendix Figure 7As shown, the radial dimension of the roller body 321 is smaller than the distance between the top wall 311 of the slide slot and the bottom wall 312 of the slide slot, and when the fixed section 1 is parallel to the telescopic section 2, a gap is left between the roller body 321 and the top wall 311 of the slide slot to provide a certain tolerance range for the up and down swing amplitude of the telescopic section 2.

[0062] Furthermore, a gap is left between the roller body 321 and the chute sidewall 313. Since the roller flange 322 is limited outside the chute, when there is a gap between the roller body 321 and the chute sidewall 313, the roller body 321 will never contact the chute sidewall 313, thereby avoiding contact friction between the roller body 321 and the chute sidewall 313.

[0063] In some embodiments, each set of limiting parts includes at least two side rails 31 distributed up and down, and one of the side rails 31 is arranged on the telescopic section 2, and the corresponding roller 32 is arranged on the side of the telescopic section 2 or the fixed section 1 of the previous section toward the extension direction of the telescopic section 2. Another side rail 31 is arranged on the telescopic section 2 or the fixed section 1 of the previous section, and the corresponding roller 32 is arranged on the side of the telescopic section 2 toward the retraction direction of the telescopic section 2. For ease of understanding, the two ends of the telescopic section 2 or the fixed section 1 of the previous section are respectively referred to as the open end and the non-open end, and the open end is penetrated by the telescopic section 2 that can move along the open end, and the direction from the non-open end to the open end is referred to as the extension direction of the telescopic section 2, and the direction from the open end to the non-open end is referred to as the retraction direction of the telescopic section 2. That is, one side rail 31 is arranged on the outer side wall of the telescopic section 2, and the corresponding roller 32 is arranged on the inner side wall of the telescopic section 2 of the previous section or the fixed section 1 near the opening end; one side rail 31 is arranged on the inner side wall of the telescopic section 2 of the previous section or the fixed section 1, and the corresponding roller 32 is arranged on the inner side wall of the telescopic section 2 near the non-opening end. The two side rails 31 are arranged on the telescopic section 2, the telescopic section 2 of the previous section or the fixed section 1 respectively to further improve the stability of the telescopic movement of the telescopic section 2.

[0064] In actual application, in order to facilitate loading and unloading, the inclination angle of the telescopic conveyor needs to be adjusted. Therefore, in some embodiments, a compound angle adjustment mechanism is also provided below the fixed section 1. Figure 1 , 9 As shown in Figure 10, the compound angle adjustment mechanism includes two groups of lifting mechanisms 51 arranged along the length direction of the telescopic section 2, each group of lifting mechanisms 51 includes at least one lifting push rod 511 that can be lifted and moved, and the upper end of each lifting push rod 511 is hinged to the fixed section 1; the two groups of lifting mechanisms 51 are synchronized by a connecting rod mechanism 52, and the movement directions of the lifting push rods 511 of the two groups of lifting mechanisms 51 are opposite.

[0065] In some embodiments, the lifting mechanism 51 also includes a screw lift 512 that is arranged in a one-to-one correspondence with the lifting push rod 511, and all the screw lifts 512 of each group of lifting mechanisms 51 are connected through a transmission assembly to achieve synchronous and unidirectional operation. Exemplarily, each group of lifting mechanisms 51 includes two lifting push rods 511, and correspondingly, two screw lifts 512 are also provided. The lifting push rod 511 is driven to move up and down by the screw lift 512, and the synchronous and unidirectional operation of all the screw lifts 512 of the same group of lifting mechanisms 51 is achieved through the transmission assembly, thereby achieving synchronous and unidirectional lifting of the lifting push rods 511 of the same group of lifting mechanisms 51.

[0066] In one embodiment, see the attached Fig.10 As shown, the transmission assembly includes a driving wheel 513, a transmission wheel 514, and a tensioning wheel 515, wherein the driving wheel 513 is mounted on the frame 53, and a hand wheel 516 is coaxially connected thereto. The driving wheel 514 is arranged in a one-to-one correspondence with the screw lift 512, and is connected to the corresponding screw lift 512. The tensioning wheel 515 is mounted on the frame 53, and a closed-loop synchronous belt or synchronous chain is wound around the driving wheel 513, the transmission wheel 514, and the tensioning wheel 515.

[0067] When the hand wheel 516 is manually turned, the driving wheel 513 rotates accordingly, thereby driving the synchronous belt or synchronous chain to drive, the transmission wheel 514 and the tension wheel 515 rotate accordingly, and the screw lift 512 connected to the transmission wheel 514 operates accordingly. The setting of the hand wheel 516 facilitates manual force to rotate the driving wheel 513, thereby driving the transmission wheel 514 and the tension wheel 515 to rotate through the synchronous belt or synchronous chain, thereby realizing the operation of the screw lift 512; the setting of the tension wheel 515 can adjust the tightness of the synchronous belt or synchronous chain.

[0068] In actual use, workers may load and unload goods on the ground or in a carriage. In order to facilitate workers to adjust the inclination angle of the conveyor on the ground or in the carriage, in this embodiment, the driving wheels 513 of the two lifting mechanisms 51 are respectively installed at different heights of the frame 53, so that the corresponding hand wheels 516 are located at different heights. Since the two lifting mechanisms 51 are connected by the connecting rod mechanism 52, when the worker operates any hand wheel 516, the two lifting mechanisms 51 can operate synchronously.

[0069] In some embodiments, the screw lift 512 includes a fixed housing mounted on a frame 53, a worm wheel and a worm that can mesh with each other are provided in the fixed housing, one end of the worm extends out of the fixed housing and is coaxially connected to a transmission wheel 514, and the other end extends out of the housing and faces another set of lifting mechanisms 51. A lifting push rod 511 is threadedly connected to the axis of the worm wheel. When the worm rotates, the worm wheel can rotate synchronously, thereby causing the lifting push rod 511 threadedly connected to the worm wheel to move up and down. It should be noted that the cooperation between the screw lift 512 and the lifting push rod 511 is a prior art, and the specific working principle thereof will not be described in detail in this embodiment.

[0070] In order to realize the reverse movement of the lifting push rods 511 of the two lifting mechanisms 51, in some embodiments, the screw lifts 512 of the two lifting mechanisms 51 can be assembled to the frame 53 in different directions, so that the worms of the two lifting mechanisms 51 are respectively located on different sides of the corresponding worm wheels, and when the worms of the two lifting mechanisms 51 rotate in the same direction, the worm wheels of the two lifting mechanisms 51 can rotate in the opposite direction. Specifically, for the convenience of description, the screw lift of one lifting mechanism is called the first screw lift, and the screw lift of the other lifting mechanism is called the second screw lift; and along the direction perpendicular to the length of the worm, one side of the worm wheels of the first screw lift and the second screw lift is the A side, and the other side is the B side. When the No. 1 screw lift and the No. 2 screw lift are installed on the frame, the worm of the No. 1 screw lift is located on the A side of the corresponding worm wheel, and the worm of the No. 2 screw lift is located on the B side of the corresponding worm wheel; at this time, when the worms of the No. 1 screw lift and the No. 2 screw lift rotate in the same direction, the worm wheel of the No. 1 screw lift (or the No. 2 screw lift) rotates clockwise, while the worm wheel of the No. 2 screw lift (or the No. 1 screw lift) rotates counterclockwise.

[0071] It should be noted that the screw lifts of the same lifting mechanism are installed in the same direction to ensure that the lifting push rods of the same lifting mechanism move in the same direction.

[0072] In some embodiments, the connecting rod mechanism 52 includes a transmission shaft, one end of which is connected to a worm of a screw lift 512 of one lifting mechanism 51, and the other end is connected to a screw lift 512 of another lifting mechanism 51. The worms of the two lifting mechanisms can rotate in the same direction by setting the transmission shaft.

[0073] Furthermore, in order to adapt to the change in the spacing between the two sets of lifting mechanisms 51, the transmission shaft includes a square shaft and a shaft tube, and the shaft tube is sleeved on the square shaft and can be extended and retracted along the axial direction of the square shaft. The axial extension and retraction of the transmission shaft (i.e., the length of the transmission shaft can be changed) is achieved through the cooperation of the square shaft and the shaft tube, so as to facilitate the installation of the transmission shaft. At the same time, the synchronous rotation of the square shaft and the shaft tube can be ensured by the setting of the square shaft, thereby ensuring that the rotation of the worm of one set of lifting mechanisms is transmitted to the worm of the other set of lifting mechanisms.

[0074] In some embodiments, see Appendix Fig. 9 As shown, the frame 53 includes a frame body 531, two sets of lifting mechanisms 51 are respectively installed on both sides of the frame body 531, and a guide bracket 532 extending upward to the fixed section 1 is provided on one side of the frame body 531. The guide bracket 532 is used to guide the tilting and swinging of the fixed section 1.

[0075] In some embodiments, universal wheels and supporting feet are also installed at the lower end of the frame body 531, and a hand push rod is connected to one side of the frame body. It should be noted that universal wheels and supporting feet are prior art, and their specific structures and working principles are not described in detail in this embodiment.

[0076] The specific working process of the telescopic conveyor of the present invention is as follows:

[0077] First, push the hand push rod to make the frame 53 drive the telescopic conveyor to move to the working position, and then pull the pull rope, the pull rope is forced to move and drive the power plate 431 to move. At this time, the limit rod 4333 located in the limit groove is forced to move and exert force on the two linkage plates 432. The linkage plate 432 then rotates along the pin shaft and drives the corresponding locking shaft 422 to move in the direction close to the linkage part 43. The locking shaft 422 then leaves the locking hole, and the telescopic section 2 is aligned with the telescopic section 2 of the previous section or the fixed The fixed section 1 is unlocked and the spring 423 is compressed; when the linkage plate 432 rotates to abut against the limiting groove, the linkage plate 432 no longer rotates. As the pull rope continues to be pulled, the linkage plate 432 can apply a force along the length direction of the telescopic section 2 to the locking shaft 422, thereby driving the locking member to move synchronously with the telescopic section 2. At this time, the roller 32 immediately moves in the corresponding slide groove to limit the movement of the telescopic section 2; when the hand handle is released, the spring 423 is reset under the action of its own elastic force, and the telescopic section 2 is released. The locking shaft 422 is driven to move in a direction away from the linkage part 43, and the locking shaft 422 is then inserted into the corresponding locking hole to lock the telescopic section 2 with the telescopic section 2 or the fixed section 1 of the previous section; then the worker manually rotates a hand wheel 516, and the corresponding driving wheel 513 rotates synchronously, and drives the transmission wheel 514 and the tensioning wheel 515 to rotate synchronously. At this time, the screw elevators 512 of a corresponding group of lifting mechanisms 51 operate synchronously, so that the lifting push rods 511 of this group rise (or fall) synchronously; at the same time, the transmission shaft rotates and drives a screw elevator 512 of another group of lifting mechanisms 51 to operate, and the driving transmission wheel 514 on the screw elevator 512 operates synchronously, and drives the remaining screw elevators 512 to operate through the transmission assembly, and at this time, the lifting push rods 511 of this group descend (or rise) synchronously; due to the reverse movement of the lifting push rods 511 of the two groups of lifting mechanisms 51, the fixed section 1 and the telescopic section 2 are driven to rotate to the specified inclination angle.

[0078] The telescopic conveyor of the present invention can achieve telescopic locking and adjustment of loading and unloading angles only through manual operation, thereby effectively reducing the consumption of power energy; in the process of manually pulling the telescopic section to move, automatic unlocking and locking can be achieved by moving the locking mechanism, thereby improving the safety and reliability of the locking; in addition, when adjusting the loading and unloading angle, by setting hand wheels at different heights, manual operation in the car or on the ground is facilitated, thereby improving operational flexibility.

[0079] The above implementation modes are only for illustrating the technical concept and features of the present invention, and their purpose is to enable people familiar with this technology to understand the content of the present invention and implement it, and they cannot be used to limit the protection scope of the present invention. Any equivalent changes or modifications made according to the spirit of the present invention should be included in the protection scope of the present invention.

Claims

1. A telescopic conveyor, comprising a fixed section and at least one telescopic section which are nested in sequence, wherein the telescopic section can telescopically move along the telescopic section or the fixed section of the previous section; Features: A telescopic limit mechanism is provided between the telescopic section and the telescopic section or fixed section of the previous section, the telescopic limit mechanism comprising two groups of limit parts symmetrically arranged on both sides of the telescopic section, each group of the limit parts comprising a side rail and a moving part used in conjunction, the side rail and the moving part are respectively arranged on the telescopic section, the telescopic section or fixed section of the previous section, to limit the movement of the telescopic section; The telescopic section is also provided with a mobile locking mechanism, which includes a telescopic transmission part, a locking part, and a linkage part used in conjunction with each other; the telescopic transmission part is used to drive the telescopic movement of the telescopic section; the locking part includes two locking members symmetrically arranged on both sides of the telescopic section, and the locking members are used to unlock or lock the telescopic section with the telescopic section or the fixed section of the previous section; the linkage part is respectively connected to the telescopic transmission part and the locking part to realize the linkage of the telescopic transmission part and the locking part; The locking member comprises a fixing sleeve, a locking shaft, and a spring. The fixing sleeve is fixedly mounted on the telescopic section along the width direction of the telescopic section. The locking shaft is passed through the fixing sleeve and the spring is sleeved thereon. Both ends of the spring abut against the locking shaft and the fixing sleeve respectively. The linkage part includes a power plate and a linkage plate, and the power plate is fixedly connected to the telescopic transmission part; the linkage plate and the locking piece are arranged in a one-to-one correspondence, and the linkage plate is pivotally connected to the telescopic section, and its two ends are respectively connected to the power plate and the corresponding locking piece through a micro-shift structure, and the micro-shift structure includes a waist-shaped hole, a round hole and a limit rod, the waist-shaped hole is arranged on the linkage plate, the round hole is arranged on the power plate or the locking shaft, and the limit rod is successively penetrated through the round hole and the waist-shaped hole along the vertical direction.

2. The telescopic conveyor according to claim 1, Features: The power plate is provided with a limiting groove, and the linkage plate is in an L-shaped structure, a corner of which is pivotally connected to the telescopic section through a pin shaft, and one end of which is installed in the limiting groove through a micro-shift structure; when the linkage plate rotates along the pin shaft until it abuts against the limiting groove, the telescopic section is in an unlocked state.

3. The telescopic conveyor according to claim 1, Features: The side rail includes a slide groove arranged along the length direction of the telescopic section, and the slide groove defines a slide groove top wall, a slide groove bottom wall and a slide groove side wall; the moving part includes rollers arranged in a one-to-one correspondence with the side rails, and the roller includes a roller body located in the slide groove, the radial dimension of the roller body is smaller than the distance between the slide groove top wall and the slide groove bottom wall, and the axial dimension of the roller body is smaller than the depth dimension of the slide groove.

4. The telescopic conveyor according to claim 3, Features: A roller convex edge is coaxially arranged on one side of the roller body away from the slide groove, and a radial dimension of the roller convex edge is greater than a distance between a top wall and a bottom wall of the slide groove.

5. The telescopic conveyor according to claim 3, Features: Each group of the limiting parts includes at least two side rails distributed up and down, and one of the side rails is arranged on the telescopic section, and the corresponding roller is arranged on the side of the telescopic section or the fixed section of the previous section toward the extending direction of the telescopic section; the other side rail is arranged on the telescopic section or the fixed section of the previous section, and the corresponding roller is arranged on the side of the telescopic section toward the retracting direction of the telescopic section.

6. The telescopic conveyor according to claim 1, Features: The invention also includes a compound angle adjustment mechanism arranged below the fixed section, the compound angle adjustment mechanism includes two groups of lifting mechanisms arranged along the length direction of the telescopic section, each group of the lifting mechanisms includes at least one lifting push rod capable of lifting and moving, and the upper end of each lifting push rod is hinged to the fixed section; the two groups of lifting mechanisms are synchronized by a connecting rod mechanism, and the movement directions of the lifting push rods of the two groups of lifting mechanisms are opposite.

7. The compound angle adjustment mechanism according to claim 6, Features: The lifting mechanism also includes screw lifts that are arranged in a one-to-one correspondence with the lifting push rods, and all the screw lifts in each group of the lifting mechanisms are connected through a transmission component to achieve synchronous and unidirectional operation.

8. The compound angle adjustment mechanism according to claim 7, Features: The transmission assembly includes a driving wheel, a transmission wheel, and a tensioning wheel. The driving wheel is installed on the frame and is coaxially connected to a hand wheel. The transmission wheel is arranged in a one-to-one correspondence with the screw lifts and is connected to the corresponding screw lifts. The tensioning wheel is installed on the frame. A closed-loop synchronous belt or synchronous chain is commonly wound around the driving wheel, the transmission wheel, and the tensioning wheel. The driving wheels of the two groups of the lifting mechanisms are respectively installed on both sides of the frame, and the installation heights are different, so that the height positions of the corresponding two hand wheels are different.

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