Two-stage lifting mechanism

Abstract

The utility model provides a two-stage lifting mechanism, which relates to the technical field of lifting and comprises a fixing component, a lifting component and a lifting component, and the fixing component comprises a fixing frame and a guide device vertically and fixedly arranged at the bottom of the fixing frame; the first-stage lifting assembly comprises a first-stage lifting element and a mounting part, the fixed end of the first-stage lifting element is connected with the fixed frame, and the telescopic end of the first-stage lifting element is used for driving the mounting part to move up and down in the vertical direction along the guide device; the two-stage lifting assembly is arranged on the mounting part and comprises a two-stage lifting element and a lifting part, the lifting part is arranged on the mounting part in a sliding mode and used for being connected with an object to be lifted, the fixed end of the two-stage lifting element is connected with the end, facing the fixing frame, of the mounting part, and the telescopic end of the two-stage lifting element is used for driving the lifting part to move horizontally in the vertical direction along the mounting part. According to the lifting mechanism, the design of the two-stage lifting assembly is adopted, the lifting range can be increased on the premise that the stability is not sacrificed, and swinging of the lifting mechanism in the transferring process is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of lifting, in particular to a two-stage lifting mechanism. Background Art

[0002] In the process of automated production and processing, transfer equipment is usually required to complete the transportation of workpieces to achieve the connection operation of different workstations. During the transportation process, a lifting mechanism is required to move the product to achieve the change of the product position.

[0003] In the prior art, the lifting mechanisms on transfer equipment mostly use a single cylinder to lift the product. However, the stroke of a single cylinder is limited by its structural size. For application scenarios that require a large range of lifting, a single cylinder is often difficult to meet the needs. If a large range of lifting is required, it is necessary to increase the use of a cylinder with a large stroke. However, as the cylinder stroke increases, especially at higher positions, the stability of the lifting mechanism will be greatly reduced. Because the cylinder has only one support point, the long stroke means that the impact of external forces (such as lateral forces) on the lifting mechanism will be amplified in the extended state, causing swinging or tilting, affecting the accuracy and safety of the operation. During the transfer process, if the lifted product swings, it will cause additional pressure and wear on the cylinder's guide system and sealing system, reducing the service life of the cylinder. Utility Model Content

[0004] In view of this, the utility model proposes a two-stage upgrading mechanism to solve the problems of swinging of a large-stroke single cylinder during the transfer process, and low stability and positioning accuracy.

[0005] The technical solution of the utility model is achieved in this way:

[0006] The utility model provides a two-stage lifting mechanism, comprising:

[0007] A fixing assembly, comprising a fixing frame and a guide device vertically fixed at the bottom of the fixing frame;

[0008] A first-stage lifting assembly, the first-stage lifting assembly comprising a first-stage lifting element and a mounting piece, the fixed end of the first-stage lifting element is connected to the fixing frame, and the telescopic end of the first-stage lifting element is used to drive the mounting piece to translate up and down in the vertical direction along the guide device;

[0009] A two-pole lifting assembly is arranged on the mounting member, and includes a secondary lifting element and a lifting member. The lifting member is slidably arranged on the mounting member. The end of the lifting member away from the mounting member is used to connect the object to be lifted. The fixed end of the secondary lifting element is connected to the end of the mounting member facing the fixed frame. The telescopic end of the secondary lifting element is used to drive the lifting member to translate in the vertical direction along the mounting member.

[0010] On the basis of the above technical solution, preferably, the guide device includes a guide rod, a first slider and a first slide rail, two guide rods are provided, the upper end of the guide rod is fixedly connected to the bottom of the fixed frame, the lower end of the guide rod extends downward in the vertical direction, the mounting member is vertically located between the two guide rods, and the guide rod and the mounting member are slidably connected through the first slider and the first slide rail.

[0011] Further, preferably, the first sliding block is arranged at the lower end of the guide rod or the upper end of the mounting member.

[0012] Preferably, a first reinforcing member is provided between a side of the guide rod away from the mounting member and the fixing frame, and a second reinforcing member is provided between both sides of the guide rod away from the mounting member and the first reinforcing member and the fixing frame respectively.

[0013] On the basis of the above technical solution, preferably, the mounting member includes a mounting box, a first mounting plate and a second mounting plate;

[0014] The installation box is a rod-shaped structure, and a mounting groove penetrating the bottom end of the installation box is opened on the top surface of the installation box along its length direction, and the first mounting plate and the second mounting plate are respectively fixedly arranged on the top surfaces at both ends of the length direction of the installation groove, and the first mounting plate is located at one end of the mounting member facing the fixing frame;

[0015] One end of the lifting member is arranged in the installation groove, and the other end extends out of the installation box, the fixed end of the secondary lifting member is hingedly connected to the first installation plate, and the telescopic end of the secondary lifting member is hingedly connected to an end of the lifting member away from the fixing frame;

[0016] The telescopic end of the primary lifting element is hinged to the second mounting plate, a second slide rail is arranged on the top surface of the lifting element along its length direction, and a second sliding block connected to the second slide rail is fixedly arranged on the bottom surface of the second mounting plate.

[0017] On the basis of the above technical solution, preferably, a limiting plate is provided on the side wall of one end of the guide rod away from the fixed frame, and a first buffer and a second buffer connected to the limiting plate are respectively provided at both ends along the length direction of the same side of the mounting member and the guide rod, and the first buffer and the second buffer are respectively located on both sides of the limiting plate.

[0018] On the basis of the above technical solution, preferably, a third buffer connected to the opening end of the installation box is provided on a side wall of one end of the lifting member away from the fixing frame.

[0019] On the basis of the above technical solution, preferably, a locking plate is fixedly provided on the upper end of the lifting member, and a locking cylinder connected to the locking plate is also fixedly provided on the fixing frame.

[0020] Further, preferably, a trigger member is provided on one side of the locking plate, and a contact switch connected to the trigger member is provided on a fixing frame on one side of the locking cylinder.

[0021] Preferably, a transition plate for installing the object to be lifted is detachably provided at the lower end of the lifting member.

[0022] Compared with the prior art, the utility model has the following beneficial effects:

[0023] (1) By setting a first-level lifting component and a second lifting component, when a smaller range of lifting is required, the second-level lifting component does not perform an action. At this time, the lifting member is retracted in the mounting member, and only the first-level lifting component drives the mounting member to move up and down along the guide device, so that the lifting operation of the object can be realized through the lifting member. When a larger range of lifting is required, the first-level lifting component first drives the mounting member to move downward. When the stroke of the first-level lifting component reaches the limit, the second-level lifting component drives the lifting member to move downward, thereby realizing the secondary lifting operation of the lifting member. Since the mounting member is guided by the guide device during the lifting process, and the lifting member is guided by the mounting member during the lifting process, the utility model adopts a two-stage lifting component design, which can increase the lifting range without sacrificing stability and reduce the swing of the lifting mechanism during the transfer process;

[0024] (2) By fixing a locking plate on the upper end of the lifting member and arranging a locking cylinder connected to the locking plate on the fixing frame, when the first-stage lifting assembly and the second-stage lifting assembly are both in a retracted state, when there is an object at the bottom end of the lifting member, the telescopic rod of the locking cylinder is extended and inserted into the lower end of the locking plate, thereby preventing the lifting member from sliding downward during heavy loading. Since the lifting member is locked by the locking cylinder, the lifting member and the mounting member as a whole remain fixed relative to the fixing frame, and the first-stage lifting assembly and the second-stage lifting assembly cannot move downward, thereby ensuring that the two-stage lifting assembly can be in a locked state when it is fully retracted, ensuring stability, installation and positioning accuracy during the transfer process.

[0025] (3) A trigger is arranged on one side of the locking plate, and a contact switch connected to the trigger is arranged on the fixing frame on one side of the locking cylinder. In this way, when the two-stage lifting assembly is fully retracted, the lifting member moves toward the fixing frame along with the mounting member, and the trigger on the lifting member touches the contact switch, thereby triggering a signal. At this time, it means that the lifting member moves into place, and the locking cylinder extends, thereby locking the two-stage lifting assembly, thereby ensuring the reliability of the locked state. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the embodiments of the utility model 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 utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0027] Figure 1 This is a schematic diagram of the first-level lifting state of the lifting mechanism disclosed in the utility model;

[0028] Figure 2 It is a schematic diagram of the secondary lifting state of the lifting mechanism disclosed in the utility model;

[0029] Figure 3 This is a schematic diagram of the lifting mechanism disclosed in the utility model in a fully retracted state;

[0030] Figure 4 This is a schematic diagram of the assembly structure of the mounting member and the lifting member disclosed in the utility model;

[0031] Figure 5 This is a schematic diagram of the installation structure of the buffer disclosed in the utility model on the lifting mechanism;

[0032] Figure 6 This is a schematic diagram of the lifting mechanism disclosed in the utility model in a fully retracted and locked state;

[0033] Figure 7 for Figure 6 A partial enlarged view of the middle part;

[0034] Reference numerals:

[0035] 1. Fixing assembly; 11. Fixing frame; 12. Guide device; 2. Primary lifting assembly; 21. Primary lifting element; 22. Mounting member; 3. Diode lifting assembly; 31. Secondary lifting element; 32. Lifting member; 121. Guide rod; 122. First slider; 123. First slide rail; 13. First reinforcement member; 14. Second reinforcement member; 221. Mounting box; 222. First mounting plate; 223. Second mounting plate; 2210. Mounting groove; 1210. Limiting plate; S1. First buffer; S2. Second buffer; S3. Third buffer; 321. Second slide rail; 2231. Second slider; 322. Locking plate; 15. Locking cylinder; 16. Contact switch; 323. Trigger member; 324. Transition plate. DETAILED DESCRIPTION

[0036] The following will be combined with the implementation of the utility model to clearly and completely describe the technical solutions in the implementation of the utility model. Obviously, the described implementation is only a part of the implementation of the utility model, not all of the implementations. Based on the implementation of the utility model, all other implementations obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0037] like Figure 1 As shown, combined Figure 2 The utility model provides a two-stage lifting mechanism, including a fixing component 1, a first-stage lifting component 2 and a second-stage lifting component 3.

[0038] The fixed assembly 1 includes a fixed frame 11 and a guide device 12 vertically fixed at the bottom of the fixed frame 11. The fixed frame 11 serves as a mounting base for the entire lifting mechanism and is connected to the translation mechanism of the transfer machine. The guide device 12 is used to provide a guiding function for the first-stage lifting assembly 2 during the telescopic process.

[0039] The first-stage lifting assembly 2 includes a first-stage lifting element 21 and a mounting member 22. The fixed end of the first-stage lifting element 21 is connected to the fixed frame 11. The telescopic end of the first-stage lifting element 21 is used to drive the mounting member 22 to translate up and down in the vertical direction along the guide device 12. Thus, under the drive of the first-stage lifting element 21, the mounting member 22 can move up and down in the vertical direction along the guide device 12. The setting of the guide device 12 can prevent the mounting member 22 from swinging or deflecting during the up and down movement.

[0040] The secondary lifting assembly 3 is arranged on the mounting member 22, and includes a secondary lifting element 31 and a lifting member 32. The lifting member 32 is slidably arranged on the mounting member 22. The end of the lifting member 32 away from the mounting member 22 is used to connect the object to be lifted. The fixed end of the secondary lifting element 31 is connected to the end of the mounting member 22 facing the fixed frame 11. The telescopic end of the secondary lifting element 31 is used to drive the lifting member 32 to translate in the vertical direction along the mounting member 22.

[0041] By adopting the above technical solution, when a relatively small range of lifting is required, the secondary lifting element 31 does not perform the action. At this time, the lifting member 32 is retracted in the mounting member 22. Only the primary lifting element 21 drives the mounting member 22 to move up and down along the guide device 12, so that the lifting operation of the object can be realized by the lifting member 32. When a large range of lifting is required, the primary lifting element 21 first drives the mounting member 22 to move downward. When the stroke of the primary lifting element 21 reaches the limit, the secondary lifting element 31 drives the lifting member 32 to move downward, thereby realizing the secondary lifting operation of the lifting member 32. Since the mounting member 22 is guided by the guide device 12 during the lifting process, the lifting member 32 is guided by the mounting member 22 during the lifting process. Therefore, the utility model adopts the design of a two-stage lifting component, which can increase the lifting range without sacrificing stability and reduce the swing of the lifting mechanism during the transfer process.

[0042] It is worth noting that the primary lifting element 21 and the secondary lifting element 31 can be a pneumatic cylinder, an oil cylinder or an electric cylinder. The fixed end of the lifting element is a cylinder body, and the telescopic end is a piston rod.

[0043] In order to ensure the stability of the mounting member 22 during the up and down translation process and reduce the swing, this embodiment shows a preferred structural setting of the guide device 12. Figure 2 As shown, specifically, the guide device 12 includes a guide rod 121, a first slider 122 and a first slide rail 123. Two guide rods 121 are provided. The upper end of the guide rod 121 is fixedly connected to the bottom of the fixed frame 11, and the lower end of the guide rod 121 extends downward in the vertical direction. The mounting member 22 is vertically located between the two guide rods 121, and the guide rod 121 and the mounting member 22 are slidably connected through the first slider 122 and the first slide rail 123.

[0044] By adopting the above technical solution, when the first-stage lifting element 21 drives the mounting member 22 to move up and down, the mounting member 22 and the guide rod 121 can be slidably connected through the first slider 122 and the first slide rail 123, so as to achieve precise guidance in the vertical direction. While improving the positioning accuracy, the mounting member 22 and the second-stage lifting assembly 3 installed on the mounting member 22 can be prevented from swinging.

[0045] As some preferred embodiments, the first slider 122 is disposed at the lower end of the guide rod 121 or the upper end of the mounting member 22. When the first slider 122 is disposed at the lower end of the guide rod 121, the first slide rail 123 is fixedly disposed on the side wall in the length direction of the mounting member 22. When the first slider 122 is disposed at the upper end of the mounting member 22, the first slide rail 123 is fixedly disposed on the side wall in the length direction of the guide rod 121.

[0046] Since the guide rod 121 serves as the guide basis of the two-stage lifting assembly and plays an important role in accurate positioning and reducing the swing of the two-stage lifting assembly, the guide rod 121 needs to maintain structural stability. To this end, in this embodiment, a first reinforcing member 13 is provided between the side of the guide rod 121 away from the mounting member 22 and the fixed frame 11, and a second reinforcing member 14 is provided between the two sides of the guide rod 121 away from the mounting member 22 and the first reinforcing member 13 and the fixed frame 11. By providing the first reinforcing member 13 and the second reinforcing member 14, it is possible to prevent the guide rod 121 from swinging in the horizontal direction when the lifting mechanism is translated on the transfer device.

[0047] In order to realize the sliding of the lifting member 32 along the mounting member 22, refer to the attached Figure 2 and 4 As shown, this embodiment shows a preferred structural mode of the mounting member 22 , and the mounting member 22 includes a mounting box 221 , a first mounting plate 222 and a second mounting plate 223 .

[0048] The installation box 221 is a square rod-shaped structure, and a mounting groove 2210 is opened on the top surface of the installation box 221 along its length direction and passes through the bottom end of the installation box 221. The first mounting plate 222 and the second mounting plate 223 are respectively fixedly arranged on the top surfaces at both ends of the length direction of the installation groove 2210, and the first mounting plate 222 is located at the end of the mounting member 22 facing the fixing frame 11.

[0049] One end of the lifting member 32 is arranged in the installation groove 2210, and the other end extends out of the installation box 221. The fixed end of the secondary lifting element 31 is hinged to the first mounting plate 222, and the telescopic end of the secondary lifting element 31 is hinged to the end of the lifting member 32 away from the fixed frame 11; the telescopic end of the primary lifting element 21 is hinged to the second mounting plate 223, and the top surface of the lifting member 32 is provided with a second slide rail 321 along its length direction, and the bottom surface of the second mounting plate 223 is fixedly provided with a second slider 2231 connected to the second slide rail 321.

[0050] By adopting the above technical solution, the lifting member 32 can be driven to extend from the installation box 221 by extending the telescopic rod of the secondary lifting element 31, and the lifting member 32 can be driven to retract into the installation box 221 by shortening the telescopic rod of the secondary lifting element 31. During the extension and retraction process of the lifting member 32, the second slide rail 321 on the lifting member 32 always maintains a sliding connection with the second slider 2231 on the bottom surface of the second mounting plate 223, thereby ensuring the guided sliding of the lifting member 32 relative to the mounting member 22, thereby avoiding the swinging phenomenon of the lifting member 32 during the up and down translation process.

[0051] Preferably, see the attached Figure 5As shown, a limit plate 1210 is provided on the side wall of one end of the guide rod 121 away from the fixed frame 11, and a first buffer S1 and a second buffer S2 connected to the limit plate 1210 are respectively provided at both ends of the same side of the mounting member 22 and the guide rod 121 along the length direction thereof, and the first buffer S1 and the second buffer S2 are respectively located on both sides of the limit plate 1210. Through the setting of the first buffer S1, when the primary lifting element 21 reaches the maximum stroke, the upper end of the mounting member 22 moves to the lower end of the guide rod 121, and the first buffer S1 and the limit plate 1210 are in conflict with each other, so that the movement of the mounting member 22 can be buffered to avoid the movement overload phenomenon. When the primary lifting element 21 retracts, the mounting member 22 moves toward the fixed frame 11, and when the lower end of the mounting member 22 is at the lower end of the guide rod 121, the second buffer S2 and the limit plate 1210 are in conflict with each other, so that the movement of the mounting member 22 can be buffered to avoid the movement overload phenomenon.

[0052] Furthermore, a third buffer S3 connected to the open end of the installation box 221 is provided on the side wall of the lifting member 32 away from the fixing frame 11. When the lifting member 32 is fully retracted into the installation member 22, the third buffer S3 and the open end of the installation box 221 can be used to abut against each other, thereby performing position limiting buffering to avoid movement overload.

[0053] See attached Figure 3 , 6 As shown in Figure 7, when both the first-stage lifting component 2 and the second-stage lifting component are in the retracted state, when there is an object at the bottom of the lifting member 32, in order to prevent the gravity of the object from pulling the lifting member 32 downward, the present embodiment also has a locking plate 322 fixedly arranged at the upper end of the lifting member 32, and a locking cylinder 15 connected to the locking plate 322 is also fixedly arranged on the fixed frame 11. With this arrangement, the telescopic rod of the locking cylinder 15 can be extended and inserted into the lower end of the locking plate 322, thereby preventing the lifting member 32 from sliding downward during heavy loading. Since the lifting member 32 is locked by the locking cylinder 15, at this time, the lifting member 32 and the mounting member 22 are kept fixed relative to the fixed frame 11 as a whole, and the first-stage lifting component 2 and the second-stage lifting component 3 cannot move downward, thereby ensuring that they can be in a locked state when the two-stage lifting components are fully retracted, ensuring stability, installation and positioning accuracy during the transfer process.

[0054] Preferably, a trigger member 323 is provided on one side of the locking plate 322, and a contact switch 16 connected to the trigger member 323 is provided on the fixing frame 11 on one side of the locking cylinder 15. With such a structural arrangement, when the two-stage lifting assembly is fully retracted, the lifting member 32 moves toward the fixing frame 11 along with the mounting member 22, and the trigger member 323 on the lifting member 32 touches the contact switch 16, thereby triggering a signal. At this time, it indicates that the lifting member 32 moves into place, and the locking cylinder 15 extends, thereby realizing the locking of the two-stage lifting assembly, and the reliability of the locked state can be ensured.

[0055] Preferably, a transition plate 324 for installing the object to be lifted is detachably provided at the lower end of the lifting member 32. By installing transition plates 324 of different types, it can be used in conjunction with different lifting devices to lift different objects.

[0056] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A two-stage lifting mechanism, characterized in that: include: A fixing assembly (1) comprises a fixing frame (11) and a guide device (12) vertically fixedly arranged at the bottom of the fixing frame (11); A first-stage lifting assembly (2), the first-stage lifting assembly (2) comprising a first-stage lifting element (21) and a mounting member (22), the fixed end of the first-stage lifting element (21) being connected to a fixing frame (11), and the telescopic end of the first-stage lifting element (21) being used to drive the mounting member (22) to move vertically up and down along the guide device (12); The two-stage lifting assembly (3) is arranged on the mounting member (22), and comprises a secondary lifting element (31) and a lifting member (32). The lifting member (32) is slidably arranged on the mounting member (22). An end of the lifting member (32) away from the mounting member (22) is used to connect with an object to be lifted. The fixed end of the secondary lifting element (31) is connected to an end of the mounting member (22) facing the fixed frame (11). The telescopic end of the secondary lifting element (31) is used to drive the lifting member (32) to translate in a vertical direction along the mounting member (22).

2. The two-stage lifting mechanism according to claim 1, characterized in that: The guide device (12) comprises a guide rod (121), a first slider (122) and a first slide rail (123); two guide rods (121) are provided; the upper end of the guide rod (121) is fixedly connected to the bottom of the fixing frame (11); the lower end of the guide rod (121) extends downward in a vertical direction; the mounting member (22) is vertically located between the two guide rods (121); the guide rod (121) and the mounting member (22) are slidably connected via the first slider (122) and the first slide rail (123).

3. The two-stage lifting mechanism according to claim 2, characterized in that: The first sliding block (122) is arranged at the lower end of the guide rod (121) or the upper end of the mounting member (22).

4. The two-stage lifting mechanism according to claim 2, characterized in that: A first reinforcing member (13) is provided between the side of the guide rod (121) away from the mounting member (22) and the fixing frame (11), and second reinforcing members (14) are provided between the two sides of the guide rod (121) away from the mounting member (22) and the first reinforcing member (13) and the fixing frame (11).

5. The two-stage lifting mechanism according to claim 2, characterized in that: The mounting member (22) comprises a mounting box (221), a first mounting plate (222) and a second mounting plate (223); The installation box (221) is in a rod-shaped structure, and a mounting groove (2210) penetrating the bottom end of the installation box (221) is provided on the top surface of the installation box (221) along its length direction; a first mounting plate (222) and a second mounting plate (223) are respectively fixedly arranged on the top surfaces at both ends of the length direction of the installation groove (2210), and the first mounting plate (222) is located at one end of the installation member (22) facing the fixing frame (11); One end of the lifting member (32) is arranged in the installation groove (2210), and the other end extends out of the installation box (221); the fixed end of the secondary lifting element (31) is hingedly connected to the first installation plate (222), and the telescopic end of the secondary lifting element (31) is hingedly connected to an end of the lifting member (32) away from the fixing frame (11); The telescopic end of the primary lifting element (21) is hingedly connected to the second mounting plate (223), a second slide rail (321) is arranged on the top surface of the lifting member (32) along its length direction, and a second sliding block (2231) connected to the second slide rail (321) is fixedly arranged on the bottom surface of the second mounting plate (223).

6. The two-stage lifting mechanism according to claim 2, characterized in that: A limiting plate (1210) is arranged on the side wall of one end of the guide rod (121) away from the fixing frame (11); a first buffer (S1) and a second buffer (S2) connected to the limiting plate (1210) are respectively arranged at both ends along the length direction of the same side of the mounting member (22) and the guide rod (121); and the first buffer (S1) and the second buffer (S2) are respectively located on both sides of the limiting plate (1210).

7. The two-stage lifting mechanism according to claim 5, characterized in that: A third buffer (S3) connected to the opening end of the installation box (221) is provided on a side wall of one end of the lifting member (32) away from the fixing frame (11).

8. The two-stage lifting mechanism according to claim 1, characterized in that: A locking plate (322) is fixedly arranged on the upper end of the lifting member (32), and a locking cylinder (15) connected to the locking plate (322) is also fixedly arranged on the fixing frame (11).

9. The two-stage lifting mechanism according to claim 8, characterized in that: A trigger member (323) is provided on one side of the locking plate (322), and a contact switch (16) connected to the trigger member (323) is provided on the fixing frame (11) on one side of the locking cylinder (15).

10. The two-stage lifting mechanism according to claim 1, characterized in that: The lower end of the lifting member (32) is detachably provided with a transition plate (324) for mounting an object to be lifted.

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