Elevator with adjustable arm span

Abstract

A cross beam is provided with a fork frame, a driving ring is provided with a cross arm through a hinge frame, the cross arm is provided with a control structure which exerts pulling force or pushing force on the cross arm to achieve arm extension adjustment, the driving ring and a stand column are in contact through planes, and therefore the driving ring can be prevented from rotating; according to the device, pulling force or pushing force is applied to the end, away from the driving ring, of the cross arm, the distance between the fork frame and the stand column can be achieved, and therefore arm extension adjustment of the elevator is achieved; the distance between the adjusting ring and the driving ring can be changed, so that the included angle between the two connecting rods of the connecting arm can be changed, the distance between the fork frame and the stand column is changed, the arm extension adjusting function is further achieved, and due to the fact that the connecting arm is connected between the adjusting ring and the driving ring, it can be avoided that the adjusting ring is driven to rotate when the outer threaded sleeve rotates.

Description

Technical Field

[0001] The invention relates to the technical field of hoists, in particular to a hoist with adjustable arm span. Background Art

[0002] An elevator is a device that lifts a bucket to a specified position. It usually includes a bracket, a hydraulic lifting device and a lifting seat. The hydraulic lifting device is arranged at the bottom of the bracket. The lifting seat moves vertically on the bracket and rises and falls under the drive of the hydraulic lifting device. A fork frame for lifting the bucket is arranged in front of the lifting seat.

[0003] Before the elevator is used, it needs to be moved to the work site. However, elevators are generally large in size, and it is impossible to ensure that the road condition is always wide when the elevator is moving to the work site. When there is a narrow road section, the elevator cannot pass smoothly, and manual intervention is required to fold or disassemble it, and then readjust or install it when the elevator passes through the section. Summary of the invention

[0004] In order to overcome the shortcomings of the prior art, the present invention provides a hoist with adjustable arm span, which can automatically adjust the arm span of the hoist so that the hoist can pass through narrow sections smoothly. At the same time, the arm span can be automatically adjusted according to the size of the cargo, and the degree of automation is higher.

[0005] In order to solve the above technical problems, the present invention provides the following technical solutions: a hoist, comprising a column, a crossbeam is installed on the column, a fork frame is installed on the crossbeam, the drive ring is driven by an external linear drive device, the column is cylindrical, and at least one plane is arranged on the circumferential wall of the column, and the inner ring of the drive ring is provided with a plane matching the plane.

[0006] Furthermore, a camera for detecting cargo or road conditions is installed at one end of the fork frame away from the crossbeam.

[0007] A boom adjustment device for a hoist comprises a crossbeam mounted on a column, a fork frame mounted on the crossbeam, the crossbeam comprises a drive ring, a cross arm is mounted on the drive ring via a hinge, and a control structure for applying a pulling force or a pushing force to the cross arm to achieve boom adjustment is mounted on the cross arm.

[0008] Furthermore, one end of the cross arm is mounted on the driving ring via a hinge, and a fork frame is mounted on one end of the cross arm.

[0009] Furthermore, the control structure comprises a U-shaped frame mounted on the cross arm, and a connecting rod is mounted on one end of the U-shaped frame away from the cross arm.

[0010] Furthermore, one end of the connecting rod away from the U-shaped frame is installed on a driving plate, a slide is provided on the driving plate, the connecting rod is installed in the slide through a slider, one end of the driving plate is fixedly installed on an adjusting ring, the driving ring is mounted on a column, and the driving ring is installed on a driving ring through a linear driving structure.

[0011] A arm span adjustment device comprises a crossbeam mounted on a column, a fork frame is mounted on the crossbeam, the crossbeam includes a drive ring sleeved on the column, an adjustment part is mounted on the drive ring, the adjustment part is sleeved on the column, the column, the drive ring and the adjustment part are coaxially arranged, a connecting arm is mounted on the adjustment part via a hinge, and a fork frame is mounted on the end of the connecting arm away from the adjustment part.

[0012] Furthermore, the adjustment part includes a control sleeve mounted on the drive ring through a bearing sleeve, an external threaded sleeve is coaxially mounted on the control sleeve, the external threaded sleeve is fixedly mounted on the control sleeve, an adjustment ring is threadedly mounted on the external threaded sleeve, and the connecting arm is connected by one end of two connecting rods, one end of one connecting rod away from the connection point is mounted on the drive ring through a shaft, and the other end of the connecting rod away from the connection point is mounted on the adjustment ring through a shaft.

[0013] Furthermore, a motor is mounted on the driving ring via a mounting frame, a gear is mounted on the output end of the motor, and teeth cooperating with the gear are arranged on the circumferential wall of the control sleeve.

[0014] Compared with the prior art, the present invention can achieve the following beneficial effects:

[0015] 1. The driving ring of the device and the column use the contact between the planes to prevent the driving ring from rotating, so as to facilitate the operation of other structures;

[0016] 2. This device can adjust the distance between the fork frame and the column by applying a pulling force or a pushing force to the end of the cross arm away from the driving ring, thereby realizing the arm span adjustment of the hoist;

[0017] 3. When the control sleeve rotates, the device drives the external threaded sleeve to rotate, causing the adjustment ring to be displaced, which can change the distance between the adjustment ring and the drive ring, so that the angle between the two connecting rods of the connecting arm can be changed, thereby changing the distance between the fork frame and the column, thereby realizing the function of arm span adjustment. Since a connecting arm is connected between the adjustment ring and the drive ring, it is possible to avoid driving the adjustment ring to rotate when the external threaded sleeve rotates, so as to ensure the smooth operation of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, without paying creative labor, other drawings obtained based on these drawings still belong to the scope of the present invention.

[0019] Figure 1 It is a schematic diagram of the overall three-dimensional structure of a hoist of the present invention;

[0020] Figure 2 It is a three-dimensional structural schematic diagram of a fork frame of a hoist of the present invention;

[0021] Figure 3 It is a schematic diagram of the overall three-dimensional structure of an arm span adjustment device for a hoist according to the present invention;

[0022] Figure 4 It is a three-dimensional structural schematic diagram of a control structure of an arm span adjustment device for a hoist according to the present invention;

[0023] Figure 5 It is a three-dimensional structural schematic diagram of a driving ring of a hoist of the present invention;

[0024] Figure 6 It is a schematic diagram of the overall three-dimensional structure of an arm span adjustment device of the present invention;

[0025] Figure 7 It is a three-dimensional structural schematic diagram of a crossbeam of a arm span adjustment device of the present invention;

[0026] Figure 8 The present invention is a schematic diagram of the three-dimensional structure of the adjusting part of the arm span adjusting device.

[0027] Among them: column 1; beam 2; drive ring 21; cross arm 22; linear drive structure 23; control structure 24; driving ring 241; driving plate 242; connecting rod 243; U-shaped frame 244; adjustment part 201; motor 2011; gear 2012; control sleeve 2013; external thread sleeve 2014; adjustment ring 2015; connecting arm 202; fork frame 3. DETAILED DESCRIPTION

[0028] In order to make the objectives, technical solutions and advantages of the present invention more clear, the present invention will be further described in detail below in conjunction with embodiments and drawings.

[0029] Embodiment:

[0030] Combination Figure 1 , Figure 2 and Figure 6As shown, the present invention provides a hoist, including a column 1, a crossbeam 2 is installed on the column 1, a fork frame 3 is installed on the crossbeam 2, the drive ring 21 is driven by an external linear drive device, and the external linear drive device is preferably a hydraulic device. The drive ring 21 can drive the crossbeam to move, so as to adjust the height of the crossbeam 2. The column 1 is cylindrical, and at least one plane is arranged on the circumferential wall of the column 1. The inner ring of the drive ring 21 is provided with a plane matching with the plane. The contact between the planes can prevent the drive ring 21 from rotating, so as to facilitate the operation of other structures.

[0031] A camera for detecting cargo or road conditions is installed at one end of the fork frame 3 away from the crossbeam 2 .

[0032] Combination Figure 3-Figure 5 As shown, a boom adjustment device for a hoist comprises a crossbeam 2 mounted on a column 1, a fork frame 3 is mounted on the crossbeam 2, the crossbeam 2 comprises a drive ring 21, a cross arm 22 is mounted on the drive ring 21 via a hinge, and a control structure 24 is mounted on the cross arm 22 for applying a pulling force or a pushing force to the cross arm 22 to achieve boom adjustment.

[0033] One end of the cross arm 22 is mounted on the driving ring 21 through a hinge, and a fork frame 3 is mounted on one end of the cross arm 22. By applying a pulling force or a pushing force to the end of the cross arm 22 away from the driving ring 21, the distance between the fork frame 3 and the column 1 can be achieved, thereby realizing the arm span adjustment of the hoist.

[0034] The control structure 24 includes a U-shaped frame 244 installed on the cross arm 22, and a connecting rod 243 is installed at one end of the U-shaped frame 244 away from the cross arm 22. By applying a pulling force or a pushing force to the connecting rod 243, the U-shaped frame 244 is used to pull or push the cross arm 22, which can drive the cross arm 22 to tilt. By controlling the tilt angle of the cross arm 22, the arm span can be adjusted.

[0035] One end of the connecting rod 243 away from the U-shaped frame 244 is installed on the driving plate 242, and a slide is provided on the driving plate 242. The connecting rod 243 is installed in the slide through a slider, and the slider can slide freely in the slide. The distance between the connecting rod 243 and the column 1 can be adjusted by sliding the slider, so that when a force is applied to the cross arm 22, over-limiting can be avoided, so that the connecting rod 243 cannot move. One end of the driving plate 242 is fixedly installed on the adjusting ring 241, and the driving ring 241 is sleeved on the column 1. The driving ring 241 can slide freely on the column 1, and the driving ring 241 is driven by the linear drive structure 2 3 is installed on the driving ring 21. The linear driving structure 23 is preferably an electric telescopic rod or a hydraulic device. The distance between the driving ring 241 and the driving ring 21 can be adjusted by the extension and contraction of the linear driving structure 23. Since the two ends of the connecting rod 243 are respectively installed on the driving plate 242 and the U-shaped frame 244, when the connecting rod 243 rises or falls, it will drive the cross arm 22 to tilt, thereby realizing the function of arm span adjustment. At this time, the distance between the connecting rod 243 and the column 1 changes. By sliding the slider on the slideway, the position of the connecting rod 243 on the driving plate 242 can be changed, thereby avoiding the device from being stuck.

[0036] Combination Figure 5-Figure 8 As shown, a wingspan adjustment device comprises a crossbeam 2 mounted on a column 1, a fork frame 3 is mounted on the crossbeam 2, the crossbeam 2 comprises a drive ring 21 sleeved on the column 1, an adjustment portion 201 is mounted on the drive ring 21, the adjustment portion 201 is sleeved on the column 1, the column 1, the drive ring 21 and the adjustment portion 201 are coaxially arranged, a connecting arm 202 is mounted on the adjustment portion 201 via a hinge, and a fork frame 3 is mounted on the end of the connecting arm 202 away from the adjustment portion 201.

[0037] The adjusting portion 201 includes a control sleeve 2013 mounted on the driving ring 21 through a bearing sleeve, the control sleeve 2013 can rotate freely on the driving ring 21, an external thread sleeve 2014 is coaxially mounted on the control sleeve 2013, the external thread sleeve 2014 is fixedly mounted on the control sleeve 2013, an adjusting ring 2015 is threadedly mounted on the external thread sleeve 2014, the connecting arm 202 is connected by one end of two connecting rods, one end of one connecting rod away from the connection point is mounted on the driving ring 21 through a shaft, and the other end of the connecting rod away from the connection point is mounted on the adjusting ring 2015 through a shaft. With this arrangement, the control sleeve 2013 can be driven when it rotates. The movable external threaded sleeve 2014 rotates, and the rotation of the external threaded sleeve 2014 cooperates with the adjusting ring 2015 through the thread, so that the adjusting ring 2015 is displaced, so that the distance between the adjusting ring 2015 and the driving ring 21 can be changed. Since the distance between the adjusting ring 2015 and the driving ring 21 changes, the angle between the two connecting rods of the connecting arm 202 can be changed, thereby changing the distance between the fork frame 3 and the column, thereby realizing the function of arm span adjustment. Since the connecting arm 202 is connected between the adjusting ring 2015 and the driving ring 21, it is possible to avoid the adjusting ring 2015 from rotating when the external threaded sleeve 2014 rotates, so as to ensure the smooth operation of the device.

[0038] In order to realize automatic control of the rotation of the control sleeve 2013, a motor 2011 is installed on the driving ring 21 through a mounting frame, and a gear 2012 is installed on the output end of the motor 2011. The circumferential wall of the control sleeve 2013 is provided with teeth that cooperate with the gear 2012. With such a configuration, when the motor 2011 is started, the gear 2012 uses the teeth to engage with the control sleeve 2013 to rotate the control sleeve 2013, thereby driving the external threaded sleeve 2014 to rotate, thereby realizing the control of the adjustment ring 2015 and the adjustment of the connecting arm, so that the device can be automatically controlled and avoid manual intervention.

[0039] Since a camera is provided at one end of the fork frame 3 away from the crossbeam 2, the camera plays a role in surveying the road conditions ahead. When the path ahead is narrow and not enough for the device to pass through, the camera will feed back the signal to the external controller, and drive the arm span adjustment device through the external controller to change the arm span so that the device can pass smoothly.

[0040] When the device is operating, the camera will collect video signals, calculate the volume of the cargo through an external computing module, and control the arm span adjustment device through an external controller to adjust the arm span distance to a distance suitable for the current cargo.

[0041] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments. The above embodiments and descriptions are only preferred examples of the present invention and are not intended to limit the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A hoist, comprising a column (1), a crossbeam (2) mounted on the column (1), a fork frame (3) mounted on the crossbeam (2), characterized in that: The driving ring (21) is driven by an external linear driving device. The column (1) is cylindrical. The circumferential wall of the column (1) is provided with at least one plane. The inner ring of the driving ring (21) is provided with a plane matching the plane.

2. A lifting machine according to claim 1, characterized in that: A camera for detecting cargo or road conditions is installed at one end of the fork frame (3) away from the crossbeam (2).

3. A boom adjustment device for a hoist, comprising a crossbeam (2) mounted on a column (1), a fork frame (3) mounted on the crossbeam (2), characterized in that: The crossbeam (2) comprises a driving ring (21), a cross arm (22) is mounted on the driving ring (21) via a hinge, and a control structure (24) is mounted on the cross arm (22) for applying a pulling force or a pushing force to the cross arm (22) to achieve arm span adjustment.

4. The arm span adjustment device for a hoist according to claim 3, characterized in that: One end of the cross arm (22) is mounted on the driving ring (21) via a hinge, and a fork frame (3) is mounted on one end of the cross arm (22).

5. The arm span adjustment device for a hoist according to claim 4, characterized in that: The control structure (24) comprises a U-shaped frame (244) mounted on the cross arm (22), and a connecting rod (243) is mounted on one end of the U-shaped frame (244) away from the cross arm (22).

6. The arm span adjustment device for a hoist according to claim 5, characterized in that: One end of the connecting rod (243) away from the U-shaped frame (244) is installed on the driving plate (242), and a slideway is provided on the driving plate (242). The connecting rod (243) is installed in the slideway through a slider, and one end of the driving plate (242) is fixedly installed on the adjustment ring (241). The driving ring (241) is sleeved on the column (1), and the driving ring (241) is installed on the driving ring (21) through a linear driving structure (23).

7. A arm span adjustment device, comprising a crossbeam (2) mounted on a column (1), a fork frame (3) mounted on the crossbeam (2), characterized in that: The crossbeam (2) comprises a driving ring (21) mounted on a column (1); an adjusting portion (201) is mounted on the driving ring (21); the adjusting portion (201) is mounted on the column (1); the column (1), the driving ring (21) and the adjusting portion (201) are coaxially arranged; a connecting arm (202) is mounted on the adjusting portion (201) via a hinge; a fork frame (3) is mounted on one end of the connecting arm (202) away from the adjusting portion (201).

8. The arm span adjustment device according to claim 7, characterized in that: The adjustment portion (201) comprises a control sleeve (2013) mounted on a drive ring (21) via a bearing sleeve, an external thread sleeve (2014) being coaxially mounted on the control sleeve (2013), the external thread sleeve (2014) being fixedly mounted on the control sleeve (2013), an adjustment ring (2015) being mounted on the external thread sleeve (2014) via threads, and the connecting arm (202) is composed of two connecting rods connected at one end, one end of one of the connecting rods being away from the connection point being mounted on the drive ring (21) via a shaft, and the other end of the connecting rod being away from the connection point being mounted on the adjustment ring (2015) via a shaft.

9. The arm span adjustment device according to claim 8, characterized in that: A motor (2011) is mounted on the driving ring (21) via a mounting frame, a gear (2012) is mounted on the output end of the motor (2011), and teeth matching the gear (2012) are arranged on the circumferential wall of the control sleeve (2013).

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