Novel lifting device

Abstract

The embodiment of the utility model provides a novel lifting device. The novel lifting device comprises a fixed support, a gear motor, a lifting support and a chain. A guide mechanism is arranged on the fixed support, and the lifting support is arranged on the guide mechanism; the gear motor is connected to the fixing support, and a chain wheel capable of being meshed with the chain is arranged on an output shaft of the gear motor. The top end of the chain is fixed to the chain wheel, and the bottom end of the chain is connected with the lifting support. According to the technical scheme, the lifting device adopts chain type transmission to replace a conventional transmission mode such as a gear and a rack, the structure is greatly simplified, the equipment size is reduced, and more application occasions are met.

Description

Technical Field

[0001] This utility model relates to the field of automobile manufacturing technology, and in particular to a novel lifting device. Background Technology

[0002] In automotive assembly lines, material conveying is frequently required, and these conveyor lines often need to switch materials at different heights. This is typically achieved by installing lifting devices at the junction of two conveyor lines with different heights. Existing pneumatic lifting devices come in various forms, including pneumatic and electric, with electric lifting devices being the most widely used. These typically use a motor and reducer to drive the lifting frame up and down through the engagement of gears and racks. However, this transmission method results in large and heavy lifting devices, which limits their application in confined spaces. Therefore, developing a compact and lightweight lifting device is a problem that needs to be solved. Utility Model Content

[0003] This utility model provides a type of lifting device to simplify the structure, reduce the size of the equipment, and make the lifting device applicable to more application scenarios.

[0004] To achieve the above objectives, this utility model provides a novel lifting device, comprising: a fixed bracket, a reduction motor, a lifting bracket, and a chain; a guide mechanism is provided on the fixed bracket, and the lifting bracket is mounted on the guide mechanism; the reduction motor is connected to the fixed bracket, and a sprocket capable of meshing with the chain is provided on the output shaft of the reduction motor; the top end of the chain is fixed to the sprocket, and the bottom end of the chain is connected to the lifting bracket.

[0005] Furthermore, the fixed support includes a horizontally arranged base, two parallel supporting columns, and two parallel guide columns; the base is formed by two horizontal beams and two vertical beams; the two supporting columns are fixedly connected to the bottom of the base; the guide columns are fixedly connected to the inner side of the vertical beams; the lifting support is a rectangular frame structure formed by a top horizontal beam, a bottom horizontal beam, and two lifting frame vertical beams; the width of the lifting support is less than the distance between the two guide columns, and the depth dimension of the lifting support is less than the distance between the two horizontal beams.

[0006] Furthermore, a set of guide mechanisms is provided at the top and bottom of the inner side of the support column; each longitudinal beam of the lifting frame is simultaneously matched with the corresponding two sets of guide mechanisms.

[0007] Furthermore, the outer side of the longitudinal beam of the lifting frame is provided with guide square steel; each set of guide mechanisms includes two first guide wheels and one second guide wheel, the rims of the two first guide wheels are respectively attached to the front and rear sides of the guide square steel, and the rim of the second guide wheel is attached to the outer side of the guide square steel.

[0008] Furthermore, the axis of the geared motor is parallel to the length direction of the crossbeam.

[0009] Furthermore, the lifting frame's longitudinal beam is also equipped with an upper limit block and a lower limit block; when the lifting frame is at its highest limit position, the top surface of the lower limit block is in contact with the bottom surface of the crossbeam, and when the lifting frame is at its lowest limit position, the bottom surface of the upper limit block is in contact with the top surface of the crossbeam.

[0010] Furthermore, the bottom end of the chain is connected to the middle of the bottom crossbeam.

[0011] Furthermore, the chain is connected to the bottom crossbeam via a chain connecting shaft; the chain connecting shaft includes a cylindrical vertical shaft and a transition block hinged to the top of the vertical shaft. The transition block is connected to the bottom end of the chain via a pin. The vertical shaft passes through a through hole opened on the bottom crossbeam, and a baffle is connected to the bottom end of the vertical shaft. The outer diameter of the baffle is larger than the diameter of the through hole.

[0012] Furthermore, a buffer spring is installed between the bottom surface of the bottom beam and the baffle.

[0013] Furthermore, the new lifting device also includes a limit switch, the triggering mechanism of which is located below the baffle.

[0014] The above technical solution has the following beneficial effects:

[0015] The lifting device in this technical solution uses chain drive to replace conventional gear and rack transmission methods, which greatly simplifies the structure and improves transmission efficiency. At the same time, the gantry-type lifting bracket moves within the H-shaped fixed bracket, making the overall structure of the equipment more simplified and reducing the overall size of the equipment, making it suitable for more applications. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a structural schematic diagram of a novel lifting device according to an embodiment of the present utility model;

[0018] Figure 2 This is a schematic diagram of the structure of the fixed bracket in an embodiment of this utility model;

[0019] Figure 3 This is a schematic diagram of the lifting bracket in an embodiment of this utility model;

[0020] Figure 4 yes Figure 2 A magnified view of a portion of point I in the middle;

[0021] Figure 5 yes Figure 1 A magnified view of a section at point II;

[0022] Reference numerals: 10. Fixed bracket; 11. Support column; 12. Crossbeam; 13. Guide column; 14. Bearing with seat; 15. First guide wheel; 16. Second guide wheel; 17. Longitudinal beam; 20. Gear motor; 30. Chain; 40. Lifting bracket; 41. Lifting frame longitudinal beam; 42. Top crossbeam; 43. Bottom crossbeam; 44. Guide square steel; 45. Support plate; 46. Lower limit block; 47. Upper limit block; 50. Chain connecting shaft; 51. Vertical shaft; 52. Adapter block; 53. Buffer spring; 54. Baffle; 55. Locking nut; 60. Limit switch. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0024] like Figure 1 As shown, this utility model embodiment provides a novel lifting device, including: a fixed bracket 10, a reduction motor 20, a lifting bracket 40, and a chain 30; the fixed bracket 10 is provided with a guide mechanism, and the lifting bracket 40 can move up and down along the guide mechanism; the reduction motor 20 is connected to the fixed bracket 10, and a sprocket 21 that can mesh with the chain 30 is provided on the output shaft of the reduction motor 20; the top end of the chain 30 is fixed to the sprocket 21 through a chain connector (or chain buckle), and the bottom end of the chain 30 is connected to the lifting bracket 40.

[0025] To solve the aforementioned problems, this utility model embodiment improves the transmission method of the lifting device. Instead of the commonly used gear and rack transmission method, it adopts a chain transmission method. When the reduction motor 20 (the combination of motor and reducer) rotates, the chain 30 meshes with the sprocket 21 and tightens and wraps around the sprocket 21, causing the chain 30 suspended below the sprocket 21 to shorten, thereby driving the lifting bracket 40 to move upward.

[0026] When the lifting bracket 40 moves downward, the number of teeth on the chain 30 wrapped around the sprocket 21 will decrease. In order to prevent the chain 30 from suddenly falling off, its top end can be fixed. There are many ways to fix it, but the preferred way is to open a pin hole on the sprocket 21, connect the chain connector to the chain 30, align the other end opening of the chain connector with the pin hole, and then insert the fixing pin to tighten it, thereby fixing the top end of the chain 30 to the sprocket 21.

[0027] It should be noted that since the chain 30 can only wrap around the sprocket 21 once at most, and a margin of 2-5 teeth must be left to prevent interference, the maximum stroke of the lifting bracket 40 is actually less than the pitch circle circumference of the sprocket 21. Therefore, in the specific design, the number of teeth on the sprocket 21 should be determined according to the actual stroke requirements to ensure that the pitch circle circumference of the sprocket 21 is greater than the stroke requirement. In addition, the connection position between the chain joint and the sprocket 21 should be reasonably set. If the lifting bracket 40 is still in the lowest limit position and part of the chain 30 is already wrapped around the sprocket 21, then this part of the chain 30 wrapped around the sprocket 21 occupies a part of the pitch circle circumference. Therefore, this part of the dimension should be taken into account in the design to avoid the lifting bracket 40 being unable to rise to the highest limit position.

[0028] Furthermore, the specific structural forms of the fixed bracket 10 and the lifting bracket 40 are as follows: Figure 2 , Figure 3 As shown, the fixed support 10 includes a horizontally arranged base, two parallel supporting columns 11, and two parallel guiding columns 13. The base is formed by two horizontal beams 12 and two vertical beams 17. The two supporting columns 11 are fixedly connected to the bottom of the base. The bottom of the guiding columns 13 is fixedly connected to the inner side of the vertical beams 17, that is, the main body of the guiding columns 13 is located above the base. The lifting support 40 is a rectangular frame structure formed by a top horizontal beam 42, a bottom horizontal beam 43, and two lifting frame vertical beams 41. A support plate 45 for support is set on the top of the lifting support 40 by welding or other means. The width of the lifting support 40 is less than the distance between the two guiding columns 13, and the depth dimension of the lifting support 40 is less than the distance between the two horizontal beams 12. That is, by designing the base as a horizontal frame structure with a square groove in the middle, the lifting support 40, which is a portal frame structure, can move up and down within the square groove. This design further simplifies the overall structure of the lifting device and helps to reduce the size of the equipment.

[0029] In addition, in this technical solution, seated bearings 14 are installed in the middle of the front and rear crossbeams 12 respectively. The selection of seated bearings 14 can simplify the design work.

[0030] Furthermore, a set of guide mechanisms is respectively installed at the top and bottom of the inner side of the supporting column 11, and each lifting frame longitudinal beam 41 is matched with the corresponding two sets of guide mechanisms. This design ensures that the lifting frame longitudinal beam 41 is constrained by the guide mechanisms both vertically and horizontally, preventing swaying during its ascent and descent, thereby ensuring stable operation.

[0031] Furthermore, the outer surface of the lifting frame longitudinal beam 41 is provided with guide square steel 44 as a guide rail; and the structure of the guide mechanism is as follows: Figure 4 As shown, each guide mechanism includes two first guide wheels 15 and one second guide wheel 16. The axle of the first guide wheel 15 is parallel to the direction of the crossbeam 12, and the axle of the second guide wheel 16 is perpendicular to the direction of the crossbeam 12. The main body of the second guide wheel 16 is hidden inside the support column 11, with only the rim protruding from the inner side of the support column 11. During guidance, the rims of the two first guide wheels 15 roll into contact with the front and rear sides of the guide square steel 44, respectively, and the rim of the second guide wheel 16 rolls into contact with the outer side of the guide square steel 44. That is, at this time, the three guide wheels "clamp" the guide square steel 44 from three directions. Since the guide columns 13 on both sides are symmetrically equipped with guide mechanisms, the lifting bracket 40 is restricted in all directions, ensuring its accurate and reliable operation. At the same time, since the guide mechanism is a guide wheel, the friction between it and the guide square steel 44 is rolling friction, thus reducing frictional resistance.

[0032] Furthermore, the axis of the geared motor 20 is parallel to the length of the crossbeam 12, while the direction of the output shaft is perpendicular to the axis of the geared motor 20. This design avoids the geared motor 20 protruding excessively from other components in the front-rear direction, thereby reducing its volume.

[0033] Furthermore, the lifting frame longitudinal beam 41 is also equipped with an upper limit block 47 and a lower limit block 46, thereby rigidly limiting the lifting frame 40 to prevent it from exceeding the preset operating range due to accidents. When the lifting frame 40 is at its highest limit position, the top surface of the lower limit block 46 is in contact with the bottom surface of the crossbeam 12; when the lifting frame 40 is at its lowest limit position, the bottom surface of the upper limit block 47 is in contact with the top surface of the crossbeam 12. To reduce impact, the bottom of the upper limit block 47 and the top of the lower limit block 46 are respectively equipped with buffer plates made of elastic material.

[0034] Furthermore, in order to ensure reasonable stress distribution and maintain the overall balance of the equipment, the bottom end of the chain 30 should be connected to the middle of the bottom crossbeam 43.

[0035] Furthermore, such as Figure 5As shown, it is difficult to directly connect the chain 30 to the bottom crossbeam 43. Furthermore, to facilitate disassembly and maintenance, a chain connecting shaft 50 can be installed between the chain 30 and the bottom crossbeam 43. The chain connecting shaft 50 includes a cylindrical vertical shaft 51 and a transition block 52 hinged to the top of the vertical shaft 51. The transition block 52 is connected to the bottom end of the chain 30 via a pin. The vertical shaft 51 passes vertically through a through hole in the bottom crossbeam 43, and a locking nut 55 is screwed to the bottom end of the vertical shaft 51. A baffle 54 is installed above the locking nut 55, with an outer diameter larger than the diameter of the through hole. Thus, when the chain 30 is pulled upwards by the sprocket 21, the chain connecting shaft 50 drives the bottom crossbeam 43 to move, thereby raising the entire lifting support 40.

[0036] Furthermore, at the moment when the sprocket 21 pulls the chain 30 upward, the baffle 54 may directly impact the bottom surface of the bottom crossbeam 43 and cause damage. Therefore, a buffer spring 53 can be installed between the bottom surface of the bottom crossbeam 43 and the baffle 54 to absorb the instantaneous impact.

[0037] Furthermore, the new lifting device also includes a limit switch 60, the triggering mechanism of which is located below the baffle 54. When the chain 30 breaks accidentally, the chain connecting shaft 50 will fall under its own weight, causing the baffle 54 to contact the triggering mechanism of the limit switch 60. The limit switch 60 can then send a signal to the control system (not shown in the figure) to trigger an alarm or immediately stop the lifting device, thus preventing safety accidents or property damage.

[0038] In the above detailed description, various features are combined together in a single embodiment to simplify this disclosure. This approach to disclosure should not be construed as reflecting an intention that embodiments of the claimed subject matter require more features than are explicitly stated in each claim. Rather, as reflected in the appended claims, the invention is presented with fewer features than all of the features in a single disclosed embodiment. Therefore, the appended claims are hereby explicitly incorporated into the detailed description, with each claim representing a separate preferred embodiment of the invention.

[0039] The disclosed embodiments have been described above to enable any person skilled in the art to implement or use this invention. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be applied to other embodiments without departing from the spirit and scope of this disclosure. Therefore, this disclosure is not limited to the embodiments given herein, but is consistent with the widest scope of the principles and novel features disclosed in this application.

[0040] The specific embodiments described above further illustrate the purpose, technical solution, and beneficial effects of this utility model. It should be understood that the above description is only a specific embodiment of this utility model and is not intended to limit the scope of protection of this utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the scope of protection of this utility model.

Claims

1. A novel lifting device characterized by, include: The assembly includes a fixed bracket (10), a geared motor (20), a lifting bracket (40), and a chain (30). The fixed bracket (10) is equipped with a guide mechanism, and the lifting bracket (40) is mounted on the guide mechanism. The geared motor (20) is connected to the fixed bracket (10), and the output shaft of the geared motor (20) is equipped with a sprocket (21) that can mesh with the chain (30). The top end of the chain (30) is fixed to the sprocket (21), and the bottom end of the chain (30) is connected to the lifting bracket (40).

2. The novel lifting device as claimed in claim 1, wherein, The fixed support (10) includes a horizontally arranged base, two parallel supporting columns (11), and two parallel guiding columns (13); the base is formed by two horizontal beams (12) and two vertical beams (17); the two supporting columns (11) are fixedly connected to the bottom of the base; the guiding columns (13) are fixedly connected to the inner side of the vertical beams (17); the lifting support (40) is a rectangular frame structure formed by a top horizontal beam (42), a bottom horizontal beam (43), and two lifting frame vertical beams (41); the width of the lifting support (40) is less than the distance between the two guiding columns (13), and the depth dimension of the lifting support (40) is less than the distance between the two horizontal beams (12).

3. The novel lifting device as claimed in claim 2, wherein, At the top and bottom of the inner side of the guide column (13), a set of the guide mechanism is provided respectively; each of the lifting frame longitudinal beams (41) is matched with the corresponding two sets of the guide mechanism.

4. The novel lifting device as claimed in claim 3, wherein, The outer side of the longitudinal beam (41) of the lifting frame is provided with a guide square steel (44); each set of the guide mechanism includes two first guide wheels (15) and one second guide wheel (16). The rims of the two first guide wheels (15) respectively roll in contact with the front and rear sides of the guide square steel (44), and the rim of the second guide wheel (16) rolls in contact with the outer side of the guide square steel (44).

5. The novel lifting device as claimed in claim 2, wherein, The axis of the geared motor (20) is parallel to the length direction of the crossbeam (12).

6. The novel lifting device as claimed in claim 2, wherein, The lifting frame longitudinal beam (41) is also provided with an upper limit block (47) and a lower limit block (46); when the lifting frame (40) is in the highest limit position, the top surface of the lower limit block (46) is in contact with the bottom surface of the crossbeam (12), and when the lifting frame (40) is in the lowest limit position, the bottom surface of the upper limit block (47) is in contact with the top surface of the crossbeam (12).

7. The novel lifting device as claimed in claim 2, wherein, The bottom end of the chain (30) is connected to the middle of the bottom crossbeam (43).

8. The novel lifting device as claimed in claim 7, wherein, The chain (30) is connected to the bottom crossbeam (43) via a chain connecting shaft (50); the chain connecting shaft (50) includes a cylindrical vertical shaft (51) and a transition block (52) hinged to the top of the vertical shaft (51). The transition block (52) is connected to the bottom end of the chain (30) via a pin. The vertical shaft (51) passes through a through hole opened on the bottom crossbeam (43) from top to bottom, and a baffle (54) is connected to the bottom end of the vertical shaft (51). The outer diameter of the baffle (54) is larger than the diameter of the through hole.

9. The novel lifting device as claimed in claim 8, wherein, A buffer spring (53) is also provided between the bottom surface of the bottom beam (43) and the baffle (54).

10. The novel lifting device as claimed in claim 8, wherein, It also includes a limit switch (60), the triggering mechanism of which is located below the baffle (54).

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