Tray type elevator

Abstract

The invention relates to the technical field of elevators, in particular to a tray type elevator which comprises a rack, a tray arranged in the rack and a driving device used for driving the tray to move up and down, a sliding groove is formed in the position, connected with the tray, of the inner side of the rack, and an extending part is arranged at the position, corresponding to the sliding groove, of the tray. The extending part is located in the sliding groove and is in sliding connection with the sliding groove; a first containing groove is formed in the position, corresponding to the extending part, in the tray, a swing device is arranged in the first containing groove, the bottom end of the swing device is exposed out of the containing groove and makes contact with the rack, and a control device used for controlling the pressure between the swing device and the rack is arranged in the first containing groove. The tray type elevator can prevent the tray from falling accidentally after accelerated falling.

Description

Technical Field

[0001] The present invention relates to the technical field of elevators, in particular to a tray-type elevator. Background Art

[0002] In warehouse logistics management, pallet lifts have been widely used as an important transportation device. During the use of pallet lifts, safety issues are the first issue people pay attention to. Among them, how to prevent the pallet from accidentally falling after loading is the top priority of the safety issue, and people have been studying it. Summary of the Invention

[0003] In view of the problems existing in the above-mentioned prior art, the present invention provides a tray-type elevator to solve at least one of the above-mentioned technical problems.

[0004] In order to achieve the above-mentioned object of the invention, the present invention provides a technical solution as follows: A pallet-type lifting machine includes a frame, a pallet arranged in the frame and a driving device for driving the pallet to move up and down, a slide groove is provided at the position where the inner side of the frame is connected to the pallet, and an extension portion is provided at the position of the pallet corresponding to the slide groove, and the extension portion is located in the slide groove and is slidably connected to the slide groove; a first accommodating groove is provided in the position of the pallet corresponding to the extension portion, a swinging device is provided in the first accommodating groove, the bottom end of the swinging device is exposed outside the accommodating groove and contacts with the frame, and a control device for controlling the pressure between the swinging device and the frame is provided in the first accommodating groove.

[0005] Preferably, the swing device includes a central axis arranged in the first accommodating groove, a swing arm is rotatably connected to the central axis, the top end of the swing arm is connected to the central axis, and the bottom end is in contact with the frame; an electric telescopic device is installed at a position corresponding to the bottom end of the swing arm in the first accommodating groove, a push rod is fixed to the power output end of the electric telescopic device, a cylinder is provided at a position corresponding to the push rod on the swing arm, a first spring is sleeved on the cylinder, and the end of the first spring that is not connected to the cylinder is sleeved on the push rod; in the original state, there is a distance between the push rod and the cylinder.

[0006] Preferably, a baffle for blocking the first spring is provided on the push rod, and a blocking portion for blocking the first spring is provided at a position of the swing arm corresponding to the cylinder.

[0007] Preferably, a rotating wheel is provided at the bottom of the swing arm, a strip groove for the rotating wheel to move up and down is provided in the slide groove, and the portion of the rotating wheel exposed from the accommodating groove is located in the strip groove and in contact with the frame.

[0008] Preferably, the electric telescopic device is an electric hydraulic cylinder, an electric pneumatic cylinder or an electric telescopic rod.

[0009] Preferably, a second accommodating groove is provided on the frame at a position corresponding to the strip groove, and the second accommodating groove is located in the lower half of the frame; an iron ball is provided in the second accommodating groove, and a fixing column is provided at a position of the iron ball facing away from the strip groove, and a second spring is sleeved on the fixing column, and an electromagnet is installed in the second accommodating groove at a position away from the strip groove, one end of the second spring rests on the iron ball, and the other end rests on the electromagnet; a notch is provided at one end of the second accommodating groove close to the strip groove, and the diameter of the notch is smaller than the diameter of the iron ball.

[0010] Preferably, the driving device is a winch or a motor.

[0011] When the pallet lifter provided by the present invention is in use, the driving device drives the pallet to move up and down to realize the lifting operation of the goods. When the pallet accidentally falls after loading the goods, the speed of the pallet will exceed the preset speed. At this time, the pressure between the bottom end of the swing arm and the frame is controlled by the control device to increase, so as to increase the friction between the bottom end of the swing arm and the frame, thereby reducing the descending speed of the pallet and preventing the pallet from accidentally falling after accelerating to fall. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 A schematic structural diagram of a tray-type elevator in an embodiment is shown; Figure 2 Shown Figure 1 Enlarged view at point A; Figure 3 Shown Figure 2 Enlarged view at point B; Figure 4 Shown Figure 1 Enlarged view at point C; In the accompanying drawings: Frame 10, slide 10-1, strip groove 10-2, second accommodating groove 10-3, iron ball 10-4, fixing column 10-5, second spring 10-6, electromagnet 10-7; tray 20, extension part 20-1, first accommodating groove 20-2, central axis 20-3, swing arm 20-4, electric telescopic device 20-5, push rod 20-6, cylinder 20-7, first spring 20-8, baffle 20-9, blocking part 20-10, rotating wheel 20-11; driving device 30. DETAILED DESCRIPTION

[0013] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0014] Example 1, please refer to Figure 1-Figure 3 The present application provides a pallet-type lifting machine, comprising a frame 10, a pallet 20 arranged in the frame and a driving device 30 for driving the pallet to move up and down, wherein the frame can use an existing structure, which can also be called a frame, the pallet is generally square, and the corresponding frame is generally square, the four corners of the pallet are connected to the four columns of the frame, the driving device can be a winch or a motor, and can be one, two, or four, etc. during design, which is well known to those skilled in the art and will not be repeated here; a slide groove 10-1 is provided at the position where the inner side of the frame is connected to the pallet, and an extension 20-1 is provided at the position of the pallet corresponding to the slide groove, and the extension is located in the slide groove and is slidably connected to the slide groove; a first accommodating groove 20-2 is provided in the pallet at a position corresponding to the extension, and a swinging device is provided in the first accommodating groove, the bottom end of the swinging device is exposed outside the accommodating groove and contacts with the frame, and a control device for controlling the pressure between the swinging device and the frame is provided in the first accommodating groove. In this embodiment, the swing device includes a central axis 20-3 arranged in the first accommodating groove, and a swing arm 20-4 is rotatably connected to the central axis, the top of the swing arm is connected to the central axis, and the bottom end is in contact with the frame; an electric telescopic device 20-5 is installed in the first accommodating groove at a position corresponding to the bottom end of the swing arm, and a push rod 20-6 is fixed to the power output end of the electric telescopic device, and a cylinder 20-7 is provided on the swing arm at a position corresponding to the push rod, and a first spring 20-8 is sleeved on the cylinder, and the end of the first spring not connected to the cylinder is sleeved on the push rod. In actual production, one end of the first spring can be fixedly connected to the cylinder, and the other end is fixedly connected to the push rod. In this embodiment, a baffle 20-9 is provided on the push rod for blocking the first spring, and a blocking part 20-10 for blocking the first spring is provided at the position of the swing arm corresponding to the cylinder. In this way, under the action of the spring, the bottom end of the swing arm passes through the opening of the first accommodating groove and rests on the frame; during production, there is a distance between the push rod and the cylinder in the original state.

[0015] When the above-mentioned pallet lift is in use, the driving device drives the pallet to move up and down to realize the lifting operation of the goods. During the rising process of the pallet, the swing arm can move toward the electric telescopic device when squeezed by the frame. Therefore, no large friction is generated with the frame, which facilitates the rising of the pallet. When the pallet accidentally falls after loading, the speed of the pallet will exceed the preset speed. At this time, the electric telescopic device can be controlled to operate so that its power output end moves forward, causing the push rod to squeeze the first spring or even to press against the cylinder, thereby causing the bottom end of the swing arm to squeeze the frame, increasing the friction between the frame and the bottom end of the swing arm, thereby reducing the descending speed of the pallet and preventing the pallet from accidentally falling after accelerating to fall.

[0016] In actual use, a rotating wheel 20-11 can also be provided at the bottom of the swing arm, and a strip groove 10-2 for the rotating wheel to move up and down is provided in the slide groove (it can also be said to be the bottom of the slide groove), and the part of the rotating wheel exposed from the accommodating groove is located in the strip groove and contacts the frame (the contact position can be called the bottom of the strip groove). When this structure is in use, the rotating wheel contacts the frame, and the friction between the swing arm and the frame can be reduced when the pallet rises. When the pallet accidentally falls after loading, the descending speed of the pallet can be gradually reduced by increasing the friction between the rotating wheel and the frame, so that the pallet falls relatively smoothly, effectively preventing the swing arm and the frame from getting stuck after rapid contact, causing impact on the pallet or the control device.

[0017] In this embodiment, the electric telescopic device can be an electric hydraulic cylinder, an electric pneumatic cylinder or an electric telescopic rod.

[0018] As a preferred embodiment, see Figure 4A second accommodating groove 10-3 is provided on the frame at a position corresponding to the strip groove. The second accommodating groove is located in the lower half of the frame, generally at 1 / 4 of the frame height; an iron ball 10-4 is provided in the second accommodating groove. The iron ball described in this embodiment is a ball made of iron material, which can be a pure iron ball or a non-pure iron ball. A fixing column 10-5 is provided at a position of the iron ball facing away from the strip groove, and a second spring 10-6 is sleeved on the fixing column. An electromagnet 10-7 is installed in the second accommodating groove at a position away from the strip groove, one end of the second spring rests on the iron ball, and the other end rests on the electromagnet; a notch is provided at one end of the second accommodating groove close to the strip groove, and the diameter of the notch is (slightly) smaller than the diameter of the iron ball. When this structure is in use, the electromagnet attracts the iron ball so that the iron ball is completely located in the second receiving groove. When the speed of the tray exceeds the preset speed continuously (for example, 10 seconds) or the speed exceeds the preset speed by a large margin (for example, the actual speed is 4 times the preset speed), the electromagnet is controlled to release the attraction of the iron ball, so that a part of the iron ball is pushed out of the slot by the second spring. In this way, when the rotating wheel descends to the position of the iron ball, it is blocked by the iron ball and then gradually squeezes the iron ball, further reducing the descending speed of the tray in the process.

[0019] During actual production, a speed sensor and a microcontroller for detecting the movement speed of the pallet can also be installed on the bottom surface of the pallet. The speed sensor detects the descending speed of the pallet and transmits it to the microcontroller. The microcontroller controls the operation of the electric telescopic device and the electromagnet to realize automatic control of the pallet lift. This is easy to implement by those skilled in the art with the above structure and will not be repeated here.

[0020] It should be noted that references in this specification to "one embodiment," "an embodiment," "an exemplary embodiment," "some embodiments," and the like indicate that the described embodiment may include a particular feature, structure, or characteristic, but not necessarily every embodiment includes that particular feature, structure, or characteristic. Furthermore, such phrases do not necessarily refer to the same embodiment. Furthermore, when a particular feature, structure, or characteristic is described in conjunction with an embodiment, it is within the knowledge of those skilled in the art to implement such feature, structure, or characteristic in conjunction with other embodiments, whether explicitly described or not.

[0021] It should be readily understood that “on,” “above,” and “over” in this disclosure should be interpreted in the broadest manner, such that “on” means not only “directly on something,” but also includes “on something” with intervening features or layers therebetween, and “above” or “over” includes not only the meaning of “above” or “over,” but also includes “above” or “over” with no intervening features or layers therebetween (i.e., directly on something).

[0022] Additionally, spatially relative terms, such as "below," "beneath," "beneath," "above," and the like, may be used herein for ease of description to describe the relationship of one element or feature to other elements or features as depicted in the figures. Spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. The device may be otherwise oriented (rotated 90 degrees or at other orientations), and the spatially relative descriptors used herein should be interpreted accordingly.

[0023] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article, or device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or elements inherent to such process, method, article, or device. In the absence of further limitations, an element defined by the phrase "comprising a ..." does not exclude the presence of other identical elements in the process, method, article, or device comprising the element.

[0024] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A tray-type elevator, comprising a frame (10), a tray (20) arranged in the frame, and a driving device (30) for driving the tray to move up and down, characterized in that: A slide groove (10-1) is provided at a position on the inner side of the frame that is connected to the tray, and an extension portion (20-1) is provided at a position on the tray corresponding to the slide groove, the extension portion being located in the slide groove and slidably connected to the slide groove; A first accommodating groove (20-2) is provided in the tray at a position corresponding to the extension portion, a swing device is provided in the first accommodating groove, the bottom end of the swing device is exposed outside the accommodating groove and contacts the frame, and a control device for controlling the pressure between the swing device and the frame is provided in the first accommodating groove.

2. A tray lift according to claim 1, characterized in that: The swing device comprises a central shaft (20-3) arranged in the first accommodating groove, a swing arm (20-4) being rotatably connected to the central shaft, the top end of the swing arm being connected to the central shaft, and the bottom end being in contact with the frame; An electric telescopic device (20-5) is installed in the first receiving groove at a position corresponding to the bottom end of the swing arm, a push rod (20-6) is fixed to the power output end of the electric telescopic device, a cylinder (20-7) is provided on the swing arm at a position corresponding to the push rod, a first spring (20-8) is sleeved on the cylinder, and an end of the first spring not connected to the cylinder is sleeved on the push rod; In an original state, there is a gap between the push rod and the cylinder.

3. A tray lift according to claim 2, characterized in that: A baffle (20-9) for blocking the first spring is provided on the push rod, and a blocking portion (20-10) for blocking the first spring is provided at a position of the swing arm corresponding to the cylinder.

4. A tray-type lift according to claim 2 or 3, characterized in that: A rotating wheel (20-11) is provided at the bottom of the swing arm, a strip groove (10-2) for the rotating wheel to move up and down is provided in the slide groove, and a portion of the rotating wheel exposed from the accommodating groove is located in the strip groove and in contact with the frame.

5. A tray lift according to claim 2, characterized in that: The electric telescopic device is an electric hydraulic cylinder, an electric pneumatic cylinder or an electric telescopic rod.

6. A tray lift according to claim 4, characterized in that: A second accommodating slot (10-3) is provided on the frame at a position corresponding to the strip-shaped slot, and the second accommodating slot is located in the lower half of the frame; An iron ball (10-4) is provided in the second receiving groove, a fixing column (10-5) is provided at a position of the iron ball facing away from the strip groove, a second spring (10-6) is sleeved on the fixing column, and an electromagnet (10-7) is installed at a position in the second receiving groove away from the strip groove, one end of the second spring abuts against the iron ball, and the other end abuts against the electromagnet; The second receiving groove is provided with a notch at one end close to the strip groove, and the diameter of the notch is smaller than the diameter of the iron ball.

7. A tray lift according to claim 1, characterized in that: The driving device is a winch or a motor.

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