A shovel-type hoist

Abstract

This invention relates to the field of lifting equipment technology and discloses a shovel elevator. The shovel elevator includes: a bucket; a baffle plate disposed within the bucket, forming a limiting space between the baffle plate and the bucket; and an adjusting mechanism, pulsatorically connected to the baffle plate. By installing the baffle plate within the bucket, the material inside the bucket is reliably limited during operation, preventing material from falling or spilling, thus avoiding material damage and improving the reliability of the shovel elevator in transporting goods. The adjusting mechanism can adjust the size of the limiting space between the baffle plate and the bucket, thereby adapting to materials of different shapes and volumes, and improving the applicability and flexibility of the shovel elevator in transporting materials.

Description

Technical Field

[0001] This invention relates to the field of lifting equipment technology, and specifically to a shovel-type hoist. Background Technology

[0002] A shovel elevator is a special type of elevator that combines a bucket and a lifting mechanism. It is typically used to transport materials or goods from one place to another, especially in the vertical direction.

[0003] Shovel elevators improve the convenience of material conveying. However, during use, material in the bucket is prone to spillage, causing damage. Summary of the Invention

[0004] In view of this, the present invention provides a shovel elevator to solve the problem that material in the bucket is easily spilled out during the use of the shovel elevator, causing material damage.

[0005] In a first aspect, the present invention provides a shovel-type hoist, comprising:

[0006] Bucket;

[0007] A baffle is disposed inside the bucket and forms a limiting space with the bucket to block and limit the material inside the bucket within the limiting space;

[0008] An adjustment mechanism is connected to the baffle and is adapted to adjust the size of the limiting space.

[0009] Beneficial effects: By installing baffles inside the bucket, the material inside the bucket is reliably limited during the operation of the shovel elevator, preventing it from falling or spilling out and thus avoiding damage to the material, thereby improving the reliability of the shovel elevator in transporting goods; the adjustment mechanism can adjust the size of the limiting space between the baffle and the bucket, thereby adapting to materials of different shapes and volumes, and improving the applicability and flexibility of the shovel elevator in transporting materials.

[0010] In one optional implementation, the adjustment mechanism includes:

[0011] Support section;

[0012] A lifting assembly is installed on the support portion; the lifting assembly includes a first worm gear mechanism.

[0013] A translation component is installed on the support and is connected to the lifting component in a transmission manner; the baffle is installed on the translation component;

[0014] The triangular adjustment block has its first corner pivotally connected to the support portion, and its second and third corners connected to the lifting assembly and the translation assembly, respectively.

[0015] Beneficial effects: By operating the first worm gear mechanism, the second corner of the triangular adjusting block is raised and lowered, thereby driving the triangular adjusting block to rotate along the pivot axis with the support. During the rotation, the third triangular part of the triangular adjusting block drives the translation component to move, and the baffle moves with the translation component, thereby adjusting the relative position of the baffle and the bucket, realizing the adjustment of the size of the limiting space to adapt to the handling of materials of different shapes and volumes.

[0016] In one optional embodiment, the shovel-type elevator further includes:

[0017] Frame;

[0018] Lifting bucket, the shovel bucket is installed in the lifting bucket;

[0019] A chain drive device is connected to the lifting bucket and is adapted to lift the lifting bucket vertically onto the frame.

[0020] Beneficial effects: The bucket is installed on the lifting bucket, enabling quick lifting and lowering of the bucket and convenient operation; the use of chain drive is more suitable for handling heavy objects than belt drive, and will not slip, resulting in higher transmission reliability.

[0021] In one alternative embodiment, the chain drive includes:

[0022] Drive mechanism;

[0023] At least two sprocket assemblies, each sprocket assembly including a sprocket and a drive chain disposed on the sprocket; the sprocket assembly is drively connected to the drive mechanism; the power output end of the drive chain is connected to the lifting bucket.

[0024] Beneficial effects: Setting up at least two sprocket assemblies enhances transmission stability and reduces vibration and noise.

[0025] In one optional embodiment, the chain drive further includes a self-locking mechanism, the self-locking mechanism comprising:

[0026] The control body has a U-shaped cross-section and is trough-shaped; the control body can be flipped and mounted on the transmission chain.

[0027] An elastic clamping part is disposed within the groove cavity of the operating body;

[0028] The fixing part is provided with a sliding groove and a locking groove;

[0029] The movable part is equipped with a locking pin; the locking pin is connected to the locking groove.

[0030] A linkage mechanism, wherein the movable part is connected to the elastic clamping part via the linkage mechanism; a gap is formed within the linkage mechanism for the transmission chain to pass through;

[0031] The self-locking mechanism has an unlocked state and a locked state. In the unlocked state, the operating body is located at a first position with a certain angle to the vertical plane, the locking pin is located at the upper end of the locking groove, and the elastic pressing part is in a natural state. When the operating body is flipped from the first position to a vertical second position under the action of external force, the locking pin moves along the locking groove to the lower end and is limited, entering the locked state. In the locked state, the elastic pressing part is compressed, pressing and locking the transmission chain.

[0032] Beneficial effects: The self-locking mechanism can lock the drive chain, and the lifting bucket can be stopped at any height, facilitating material transportation. By applying an external force to the operating body of the self-locking mechanism, the operating body is pushed from the first position to the second position. During this process, the operating body, linkage mechanism, and moving parts work together to compress the elastic clamping part and lock the locking pin in place. The rebound force of the elastic clamping part is used to limit and lock the drive chain in the gap, preventing the drive chain from moving.

[0033] In one alternative embodiment, the linkage mechanism includes:

[0034] The first rod, the first end of the first rod being hinged to the elastic clamping part;

[0035] The second rod has its first end hinged to the second end of the first rod, and its second end hinged to the first end of the movable part.

[0036] The third rod has its first end hinged to the second end of the movable part, and the hinge point is slidably disposed within the slide groove; the locking pin is located between the first end and the second end of the movable part.

[0037] The fourth rod has its first end hinged to the control body and its second end hinged to the second end of the third rod.

[0038] Beneficial effects: The connecting mechanism formed by the first, second, third and fourth rods realizes the locking action of the locking pin during the transmission process, and the structure is compact.

[0039] In one alternative implementation, the drive mechanism is provided with a frequency converter.

[0040] Beneficial effects: The drive mechanism is equipped with a frequency converter, which improves energy efficiency.

[0041] In one optional embodiment, the shovel-type elevator further includes:

[0042] Support legs;

[0043] A telescopic mechanism is provided between the outrigger and the frame.

[0044] Beneficial effects: The outriggers are equipped with telescopic mechanisms to adjust their height, adapting to different road surfaces and expanding their applicability.

[0045] In one optional implementation, the telescopic mechanism includes:

[0046] A support frame, wherein the frame body is fixed to the support frame;

[0047] A helical rod is disposed on the bottom side of the bracket;

[0048] The second worm gear mechanism includes a meshing worm gear and a worm, wherein the worm gear is threadedly connected to the helical rod;

[0049] Rotate the handle, which is located at the end of the worm, to drive the worm to rotate.

[0050] Beneficial effects: By turning the handle, the worm gear is driven to rotate, which in turn drives the worm wheel to rotate, and the spiral rod that meshes with the center of the worm wheel achieves lifting and lowering.

[0051] In one alternative implementation, the outrigger includes a shock-absorbing mechanism.

[0052] Beneficial effects: The outriggers are equipped with shock-absorbing mechanisms, which improves operational stability and reduces the impact of vibration on the conveying process. Attached Figure Description

[0053] To more clearly illustrate the technical solutions in the specific embodiments or related technologies of the present invention, the drawings used in the description of the specific embodiments or related technologies will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0054] Figure 1 This is a three-dimensional structural diagram of an adjustment mechanism according to an embodiment of the present invention;

[0055] Figure 2 This is a perspective structural diagram of a shovel-type hoist according to an embodiment of the present invention, where the bucket is not shown.

[0056] Figure 3 This is a three-dimensional structural diagram of a self-locking mechanism according to an embodiment of the present invention;

[0057] Figure 4 This is a side view of a self-locking mechanism according to an embodiment of the present invention, showing the unlocked state;

[0058] Figure 5 for Figure 4 Schematic diagram of the connection structure between the self-locking mechanism and the transmission chain;

[0059] Figure 6 for Figure 5 A magnified schematic diagram of part A in the middle section;

[0060] Figure 7 This is a side view of a self-locking mechanism according to an embodiment of the present invention, showing the locked state;

[0061] Figure 8 This is a three-dimensional structural diagram of a telescopic mechanism according to an embodiment of the present invention;

[0062] Figure 9 This is a three-dimensional structural diagram of another telescopic mechanism according to an embodiment of the present invention.

[0063] Explanation of reference numerals in the attached figures:

[0064] 10. Adjustment mechanism;

[0065] 11. Support section;

[0066] 12. Lifting assembly;

[0067] 13. Translation component;

[0068] 14. Triangular adjustment block;

[0069] 15. Baffle connector;

[0070] 20. Frame;

[0071] 30. Raise the bucket;

[0072] 40. Sprocket assembly;

[0073] 41. Transmission chain;

[0074] 50. Drive mechanism;

[0075] 60. Self-locking mechanism;

[0076] 61. The main body of manipulation;

[0077] 62. Elastic clamping part;

[0078] 63. Fixing part;

[0079] 631. Slide groove;

[0080] 632. Locking groove;

[0081] 64. Activities Department;

[0082] 641. Locking pin;

[0083] 65. Linkage mechanism;

[0084] 651, First shot;

[0085] 652, Second shot;

[0086] 653, Third shot;

[0087] 654, Fourth shot;

[0088] 66. Gap;

[0089] 70. Telescopic mechanism;

[0090] 71. Bracket;

[0091] 711. Guide wheel;

[0092] 72. Screw rod;

[0093] 73. Turn the handle. Detailed Implementation

[0094] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0095] In the description of the invention, it should be noted that, unless otherwise stated, "a plurality of" means two or more; the terms "upper," "lower," "left," "right," "inner," "outer," "front end," "rear end," "head," "tail," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention. Furthermore, the terms "first," "second," "third," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0096] In the description of this invention, it should also be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0097] The following is combined Figures 1 to 8 The following describes embodiments of the present invention.

[0098] According to an embodiment of the present invention, in one aspect, a shovel-type hoist is provided, comprising:

[0099] Bucket;

[0100] A baffle is disposed inside the bucket and forms a limiting space with the bucket to block and limit the material inside the bucket within the limiting space;

[0101] The adjusting mechanism 10 is connected to the baffle and is adapted to adjust the size of the limiting space.

[0102] By installing a baffle inside the bucket, the material inside the bucket is reliably limited during the operation of the shovel elevator, preventing the material from falling or spilling out, thus avoiding material damage and improving the reliability of the shovel elevator in conveying goods. The adjustment mechanism 10 can adjust the size of the limiting space between the baffle and the bucket, thereby adapting to materials of different shapes and volumes, and improving the applicability and flexibility of the shovel elevator in conveying materials.

[0103] In one alternative implementation, such as Figure 1 As shown, the adjustment mechanism 10 includes:

[0104] Support part 11;

[0105] A lifting assembly 12 is installed on the support part 11; the lifting assembly 12 includes a first worm gear mechanism.

[0106] Translation component 13 is installed on the support part 11 and is connected to the lifting component 12 in a transmission manner; the baffle is installed on the translation component 13;

[0107] The triangular adjustment block 14 has its first corner pivotally connected to the support part 11, and its second and third corners connected to the lifting assembly 12 and the translation assembly 13, respectively.

[0108] By operating the first worm gear mechanism, the second corner of the triangular adjusting block 14 is raised and lowered, thereby driving the triangular adjusting block 14 to rotate along the pivot axis with the support part 11. During the rotation, the triangular part of the triangular adjusting block 14 drives the translation component 13 to move. The baffle moves with the translation component 13, thereby adjusting the relative position of the baffle and the bucket, and realizing the adjustment of the size of the limiting space to adapt to the handling of materials of different shapes and volumes.

[0109] In one alternative implementation, such as Figure 2 As shown, the shovel-type elevator also includes:

[0110] Frame 20;

[0111] Lifting bucket 30, the bucket is installed on the lifting bucket 30;

[0112] A chain drive device is connected to the lifting bucket 30 and is adapted to lift the lifting bucket 30 vertically onto the frame 20.

[0113] The bucket is installed on the lifting bucket 30, enabling quick lifting and lowering of the bucket and convenient operation; it adopts a chain drive device, which is more suitable for handling heavy objects than belt drive, and will not slip or other issues, resulting in higher transmission reliability.

[0114] In one alternative embodiment, the chain drive includes:

[0115] Drive mechanism 50;

[0116] At least two sprocket assemblies 40, each sprocket assembly 40 including a sprocket and a drive chain 41 disposed on the sprocket; the sprocket assembly 40 is drively connected to the drive mechanism 50; the power output end of the drive chain 41 is connected to the lifting bucket 30.

[0117] The transmission is equipped with at least two sprocket assemblies 40 to enhance transmission stability and reduce vibration and noise.

[0118] In an optional embodiment, the chain drive further includes a self-locking mechanism 60, such as... Figures 3 to 7 As shown, the self-locking mechanism 60 includes:

[0119] The control body 61 has a U-shaped cross-section and is trough-shaped; the control body 61 can be flipped and mounted on the transmission chain 41.

[0120] An elastic clamping part 62 is disposed in the groove cavity of the operating body 61;

[0121] The fixing part 63 is provided with a sliding groove 631 and a locking groove 632;

[0122] The movable part 64 is provided with a locking pin 641; the locking pin 641 is engaged with the locking groove 632.

[0123] Linkage mechanism 65, the movable part 64 is connected to the elastic pressing part 62 through the linkage mechanism 65; a gap 66 is formed in the linkage mechanism 65 for the transmission chain 41 to pass through;

[0124] The self-locking mechanism 60 has an unlocked state and a locked state, such as Figure 4 and Figure 5As shown, in the unlocked state, the operating body 61 is located at a first position forming a certain angle with the vertical plane, the locking pin 641 is located at the upper end of the locking groove 632, and the elastic pressing part 62 is in a natural state; when the operating body 61 is flipped from the first position to a vertical second position under the action of external force, the locking pin 641 moves along the locking groove 632 to the lower end and is limited, entering the locked state; as Figure 7 As shown, in the locked state, the elastic pressing part 62 is compressed, which presses and locks the transmission chain 41 against it.

[0125] The self-locking mechanism 60 can lock the transmission chain, and the lifting bucket 30 can be stopped at any height for convenient material conveying. By applying an external force to the operating body 61 of the self-locking mechanism 60, the operating body 61 is pushed from the first position to the second position. During the process, the operating body 61, the linkage mechanism 65 and the moving part 64 work together to compress the elastic pressing part 62 and lock the locking pin 641. The rebound force of the elastic pressing part 62 is used to limit and lock the transmission chain in the gap 66, so that the transmission chain cannot move.

[0126] In one alternative implementation, such as Figures 4 to 7 As shown, the linkage mechanism 65 includes:

[0127] The first rod 651, the first end of the first rod 651 is hinged to the elastic pressing part 62;

[0128] The second rod 652 has its first end hinged to the second end of the first rod 651, and its second end hinged to the first end of the movable part 64.

[0129] The third rod 653 has its first end hinged to the second end of the movable part 64, and the hinge point is slidably disposed in the slide groove 631; the locking pin 641 is located between the first end and the second end of the movable part 64.

[0130] The fourth rod 654 has its first end hinged to the operating body 61, and its second end hinged to the second end of the third rod 653.

[0131] The connecting mechanism formed by the first rod 651, the second rod 652, the third rod 653 and the fourth rod 654 realizes the locking action of the locking pin 641 during the transmission process, and the structure is compact.

[0132] In one alternative embodiment, the drive mechanism 50 is provided with a frequency converter.

[0133] The drive mechanism 50 is equipped with a frequency converter to improve energy efficiency.

[0134] In one optional embodiment, the shovel-type elevator further includes:

[0135] Support legs;

[0136] The telescopic mechanism 70 is disposed between the outrigger and the frame 20.

[0137] The outriggers are equipped with a telescopic mechanism 70, which allows for height adjustment to adapt to different road surfaces and has a wider range of applications.

[0138] In one alternative implementation, such as Figure 8 and Figure 9 As shown, the telescopic mechanism 70 includes:

[0139] Support 71, the frame body 20 is fixed to the support 71;

[0140] The spiral rod 72 is disposed on the bottom side of the bracket 71;

[0141] The second worm gear mechanism includes a meshing worm gear and a worm, wherein the worm gear is threadedly connected to the helical rod 72;

[0142] Rotate the handle 73, which is located at the end of the worm, to drive the worm to rotate.

[0143] By turning the handle 73, the worm gear is driven to rotate, which in turn drives the worm wheel to rotate, and the spiral rod 72, which meshes with the center of the worm wheel, achieves lifting and lowering.

[0144] In some other embodiments, such as Figure 9 As shown, the bracket 71 is equipped with guide wheels 711 to provide guidance, making it easy to install the frame 20 above the legs, saving time and effort.

[0145] In one alternative implementation, the outrigger includes a shock-absorbing mechanism.

[0146] The outriggers are equipped with shock-absorbing mechanisms to improve operational stability and reduce the impact of vibration on the conveying process.

[0147] The shovel hoist uses high-quality alloy steel as its main material to ensure its durability and stability under high-intensity working environments. The core component of the equipment is the hoisting bucket 30, which features a streamlined design that not only increases material capacity but also reduces resistance during the hoisting process. The connection between the hoisting bucket 30 and the chain employs a unique hinge design with an integrated self-locking function, ensuring that the hoist is less prone to accidental slippage when parked, thus enhancing operational safety. High-strength materials are specially selected to enhance the hinge's load-bearing capacity and adapt to heavy-load requirements in various environments. The locking mechanism can be unlocked by applying external force. Under the action of external force, the operating body 61 begins to move and prepares to leave the locked position. When the operating body 61 is completely out of the locked position, the locking pin separates from the locking groove or hole. At this point, the hinge returns to a free-rotating state, allowing for corresponding operations or adjustments.

[0148] The shovel hoist's power system utilizes a high-efficiency, energy-saving electric motor equipped with an intelligent frequency converter. This system not only automatically adjusts the speed according to load changes to achieve energy savings, but also provides smooth operation during start-up and shutdown, reducing equipment wear. Furthermore, the equipped intelligent control system (without modifications) can monitor the equipment's operating status in real time and adjust parameters promptly, thereby ensuring the equipment's safety and stability.

[0149] In terms of safety design, we have considered various potential risks and equipped the equipment with multiple safety protection measures. These include overload protection, emergency stop devices, and anti-misoperation designs to ensure that the equipment can be quickly shut down in abnormal situations and avoid accidents under extreme conditions. At the same time, all contact parts of the hoist have undergone special treatment with a wear-resistant alloy layer to effectively prevent fire hazards caused by friction.

[0150] This shovel elevator is designed with excellent adaptability, allowing it to be adjusted according to the characteristics of different materials and working environments. Its modular design enables flexible customization to meet the requirements of various locations.

[0151] Optimized bucket design: A streamlined bucket design reduces digging resistance and improves digging efficiency. A wear-resistant alloy layer is applied to the bucket edges to enhance wear resistance and extend service life. An adjustable material placement space baffle is installed inside the bucket. The first worm gear screw mechanism includes a rotating threaded cap connected to a worm, which meshes with a worm wheel. The worm wheel has a threaded hole in its center, and a threaded post is installed within the threaded hole. Figure 1As shown, by rotating the threaded cap, the threaded column is moved up and down due to the transmission between the threaded cap and the threaded post. This movement causes the triangular adjusting block 14 to rotate, thereby moving the slider of the translation assembly 13 along the slide rail, causing the baffle mounted on the slider to move, thus adjusting the distance and space between the baffle and the bucket. This adjustment is made according to the shape and volume of the material, reducing the risk of material spillage and breakage.

[0152] Drive system improvements: A variable frequency speed-regulating motor is adopted, which automatically adjusts the speed according to the load to achieve energy saving and consumption reduction. A double sprocket drive system is designed. The double sprocket drive system of the hoist consists of several important components, and its input end is mainly connected to the motor. The motor transmits rotational power to the double sprockets through a coupling, and directly drives the working mechanism of the hoist through chain drive, which enhances transmission stability and reduces vibration and noise.

[0153] An intelligent control system is introduced to monitor the operating status of the hoist in real time, enabling fault early warning and remote control.

[0154] Enhanced Structural Stability: Optimized frame structure using high-strength steel and appropriate welding processes—considering the material properties, structural complexity, and production costs of the hoist frame, a hybrid welding process (arc welding combined with MAG welding) is recommended. This process effectively controls the heat-affected zone while ensuring weld strength, reducing material deformation and stress concentration. Furthermore, combining it with modern welding equipment improves welding efficiency and quality, enhancing overall rigidity and stability.

[0155] Adding shock-absorbing devices reduces impact and wear on the equipment during operation. The design incorporates retractable support legs to adapt to varying ground heights, ensuring stable operation of the hoist. Figure 8 and Figure 9 As shown, rotating the handle 73 causes the support screw 72 to rise, thereby supporting the hoist to lift to the required height.

[0156] The shovel hoist can be divided into the following main modules:

[0157] The lifting module, including the lifting bucket and lifting chain, is responsible for lifting and transporting materials.

[0158] The drive module, including the motor, reducer, and transmission device, provides power support.

[0159] The control module, including the control system, sensors, monitoring equipment, etc., enables automated control and monitoring of the hoist.

[0160] The base module, including the equipment support structure and foundation, ensures the stability of the hoist.

[0161] Technical effects of the present invention:

[0162] Efficiency is significantly improved. Through optimized bucket design, digging efficiency is increased by approximately 20%, resulting in a significant overall improvement in efficiency.

[0163] Energy consumption is significantly reduced. The application of variable frequency speed control motors and intelligent control systems reduces energy consumption by about 15%, achieving green production.

[0164] The design of wear-resistant alloy layers, shock-absorbing devices, and high-strength structures reduces maintenance costs, extends equipment lifespan, and decreases maintenance frequency and costs.

[0165] The adjustable-angle baffle design reduces material breakage during the lifting process and improves material quality.

[0166] Enhanced operational stability: The optimization of the overall structure and the application of vibration damping devices have improved the operational stability of the equipment and reduced the occurrence of failures.

[0167] Although embodiments of the invention have been described in conjunction with the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of the invention, and such modifications and variations all fall within the scope defined by this application.

Claims

1. A shovel-type elevator, characterized by The shovel includes: a bucket; a baffle arranged in the bucket and forming a limiting space with the bucket to block the material in the bucket in the limiting space; an adjusting mechanism (10) in driving connection with the baffle and adapted to adjust the size of the limiting space; the adjusting mechanism (10) includes: a support part (11); a lifting assembly (12) mounted on the support part (11); the lifting assembly (12) includes a first worm gear mechanism; a translation assembly (13) mounted on the support part (11) and in driving connection with the lifting assembly (12); the baffle is mounted on the translation assembly (13); a triangular adjusting block (14) having a first corner pivoted to the support part (11) and a second corner and a third corner connected with the lifting assembly (12) and the translation assembly (13) respectively.

2. A scraper lift as claimed in claim 1, characterised in that, The shovel elevator further includes: a frame (20); a lifting bucket (30) on which the bucket is mounted; a chain transmission device in driving connection with the lifting bucket (30) and adapted to arrange the lifting bucket (30) on the frame (20) in a liftable manner.

3. A scraper lift as claimed in claim 2, characterised in that, The chain transmission device includes: a driving mechanism (50); at least two sprocket assemblies (40) including sprockets and transmission chains arranged on the sprockets; the sprocket assemblies (40) are in driving connection with the driving mechanism (50); and power output ends of the transmission chains are connected with the lifting bucket (30).

4. A scraper lift as claimed in claim 3, characterised in that, The chain transmission device further includes a self-locking mechanism (60) including: a control main body (61) in the shape of a groove with a U-shaped cross section; the control main body (61) is reversibly arranged on the transmission chain; a resilient compression part (62) arranged in a groove cavity of the control main body (61); a fixed part (63) provided with a sliding groove (631) and a locking groove (632); a movable part (64) provided with a locking pin (641); the locking pin (641) is in matched connection with the locking groove (632); a connecting rod mechanism (65); the movable part (64) is connected with the resilient compression part (62) through the connecting rod mechanism (65); the connecting rod mechanism (65) is formed with a gap (66) through which the transmission chain passes; the self-locking mechanism (60) has an unlocking state and a locking state; in the unlocking state, the control main body (61) is located at a first position at a certain angle with a vertical plane, the locking pin (641) is located at an upper end of the locking groove (632), and the resilient compression part (62) is in a natural state; when the control main body (61) is reversibly turned from the first position to a second vertical position under the action of an external force, the locking pin (641) moves to the lower end of the locking groove (632) and is limited, entering the locking state; in the locking state, the resilient compression part (62) is compressed to lock the transmission chain.

5. A scraper lift as claimed in claim 4, characterised in that, the connecting rod mechanism (65) includes: a first rod (651) having a first end hinged to the resilient compression part (62). A second rod (652) has a first end hinged to a second end of the first rod (651) and a second end hinged to a first end of the movable part (64); A third rod (653) has a first end hinged to a second end of the movable part (64) and a hinged point slidably arranged in the sliding groove (631); the locking pin (641) is located between the first end of the movable part (64) and the second end of the movable part (64); A fourth rod (654) has a first end hinged to the operating main body (61) and a second end hinged to a second end of the third rod (653).

6. The shovel elevator of claim 3, wherein, The driving mechanism (50) is provided with a frequency converter.

7. The shovel elevator of claim 2, wherein, The shovel type lifting machine further comprises: A supporting leg; A telescopic mechanism (70) arranged between the supporting leg and the frame body (20).

8. A scraper lift as claimed in claim 7, characterised in that, The telescopic mechanism (70) comprises: A support (71), wherein the frame body (20) is fixed to the support (71); A screw rod (72) arranged at a bottom side of the support (71); A second worm and gear mechanism comprising a worm wheel and a worm in engagement, wherein the worm wheel is threadedly connected to the screw rod (72); A rotating handle (73) arranged at an end of the worm to drive the worm to rotate.

9. The shovel elevator of claim 7, wherein, The supporting leg comprises a damping mechanism.

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