Lower chain adjusting structure of elevator

Abstract

The utility model relates to an elevator lower portion chain adjusting structure which comprises a machine shell and a main shaft of an elevator lower portion assembly, the main shaft and the machine shell are installed in a matched mode through an adjusting assembly, and the adjusting assembly comprises two symmetrically-arranged adjusting units. Each adjusting unit structurally comprises a first adjusting seat and an end plate, and a second adjusting seat is fixed on the end plate; the device further comprises an adjusting shaft, the end of the adjusting shaft is fixed to a bearing seat, the bearing seat is matched with an outer ring of a rotating bearing, an inner ring of the rotating bearing is matched with the outer circumferential face of the main shaft, and a pointer is fixed to the bearing seat and matched with the ruler. A spring mechanism is further installed on the outer circumferential face of the adjusting shaft in a matched mode. By arranging the adjusting unit, the stress condition of the main shaft in the lower assembly of the elevator can be fed back in time, so that adjustment is facilitated, the maintenance time is shortened, the yield is guaranteed, manual experience is not needed, and the labor cost is saved.

Description

Technical Field

[0001] The utility model relates to the technical field of elevators, in particular to a lower chain adjustment structure of an elevator. Background Art

[0002] The chain elevator achieves vertical lifting of materials through sprockets and chains, and is suitable for lifting solid and powdery materials. Its structure includes an outer frame, a driving device, a lifting carrier, a traction chain, and a guide device. The driving device usually uses a motor, and the output end of the motor is connected to the drive shaft through a reducer. A sprocket is installed on the drive shaft. The motor transmits power to the chain through the sprocket, so that the chain carries the lifting carrier up or down under the action of the guide device, thereby transporting the material in the lifting carrier.

[0003] In the prior art, the chain in the hoist will become loose after being used for a period of time. Since multiple sprockets are installed on the main shaft, the loose chain in the hoist usually causes unbalanced force on the main shaft, which leads to unstable chain transmission performance and affects the transmission efficiency. At the same time, the unbalanced force on the main shaft caused by the loose chain is usually not easy to detect, and maintenance and adjustment are completely dependent on the operator's experience and judgment, with high labor costs, and constant adjustments and attempts are required. The operation is cumbersome and the maintenance efficiency is low, which leads to increased downtime for maintenance and reduced production. Utility Model Content

[0004] In view of the shortcomings in the above-mentioned existing production technology, the applicant provides a lower chain adjustment structure for a hoist. By setting an adjustment unit, the stress condition of the main shaft in the lower assembly of the hoist can be fed back in time, thereby facilitating adjustment, reducing maintenance time, ensuring production, and eliminating the need to rely on manual experience, thus saving labor costs.

[0005] The technical solution adopted by the utility model is as follows:

[0006] A hoist lower chain adjustment structure comprises a casing and a main shaft of a hoist lower assembly, wherein the main shaft is mounted in cooperation with the casing through an adjustment component, and the adjustment component comprises two symmetrically arranged adjustment units;

[0007] The structure of a single adjustment unit is as follows: it includes a first adjustment seat fixed on the outer wall of the casing, and an end plate located below the first adjustment seat, the back of the end plate is fixed on the outer wall of the casing, and the front of the end plate is fixed with a second adjustment seat, and the first adjustment seat and the second adjustment seat are arranged from top to bottom along the height direction of the elevator;

[0008] It also includes an adjustment shaft, the adjustment shaft passes through the first adjustment seat and the second adjustment seat at the same time, and the end is fixed to the bearing seat, the bearing seat is arranged below the second adjustment seat, the bearing seat is matched with the outer ring of the rotating bearing, and at the same time, the inner ring of the rotating bearing is matched with the outer circumferential surface of the main shaft, and a pointer is fixed on the bearing seat, and the pointer is matched with the ruler;

[0009] A spring mechanism is also mounted on the outer circumferential surface of the adjusting shaft, and the spring mechanism is used to adjust the force applied by the adjusting shaft to the bearing seat, so that the pointers in the two adjustment units point to the same position on the corresponding scale.

[0010] As a further improvement of the above technical solution:

[0011] The single adjustment shaft is fastened to the corresponding first adjustment seat through a first nut.

[0012] The single adjustment shaft is fastened to the corresponding second adjustment seat through a second nut.

[0013] An upper connecting seat is arranged on the top of the single bearing seat, and the single upper connecting seat is fixed to the adjusting shaft through a limit block.

[0014] The structure of a single spring mechanism is as follows: it includes an adjusting spring sleeved on the outer circumferential surface of the adjusting shaft, one end of the adjusting spring is connected to the first limiting ring plate, and the other end is connected to the second limiting ring plate, the top end surface of the first limiting ring plate is fitted with the bottom end surface of the first adjusting seat, so that the first limiting ring plate is limited by the first adjusting seat, and the bottom end surface of the second limiting ring plate is fitted with the top end surface of the locking nut, so that the second limiting ring plate is limited by the locking nut.

[0015] A single ruler is fixed to the housing.

[0016] A plurality of guide plate groups are also fixed on the outer wall surface of the housing, and the guide plate groups correspond to the bearing seats one by one;

[0017] The single guide plate group includes two guide plates, which are respectively arranged on both sides of the corresponding bearing seat, so as to guide the movement of the corresponding bearing seat.

[0018] A cover plate is fixed to the outer side of the single bearing seat.

[0019] A plurality of sprockets are fixed at intervals on the outer circumferential surface of the main shaft.

[0020] Two adjacent sprockets are connected by a connecting rod.

[0021] The beneficial effects of the utility model are as follows:

[0022] The utility model has a compact and reasonable structure and is easy to operate. By arranging an adjustment unit, the force condition of the main shaft in the lower assembly of the elevator can be judged according to the pointing position of the pointer on the corresponding scale, thereby facilitating adjustment, reducing maintenance time, ensuring production, and not relying on manual experience, thus saving labor costs.

[0023] The utility model also has the following advantages:

[0024] (1) In the utility model, a spring mechanism is provided. When the chain is loosened and the force on the main shaft is unbalanced, the installation position of the second limit ring plate is adjusted to adjust the force of the adjustment shaft on the corresponding bearing seat, so that the main shaft is restored to a balanced force state.

[0025] (2) The present invention can also be used to provide feedback on the looseness of the chain by providing a pointer and a scale, so that the operator can re-tighten the chain in time through the tensioning device according to the indication of the pointer.

[0026] (3) In the present invention, by providing a guide plate, the movement of the corresponding bearing seat can be guided, so that the bearing seat moves along the height direction of the elevator, thereby preventing the bearing seat from shaking in other directions. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a structural schematic diagram of the utility model.

[0028] Figure 2 for Figure 1 main view.

[0029] Figure 3 for Figure 2 Cross-sectional view of section AA.

[0030] Figure 4 for Figure 3 A partial enlarged view of point A.

[0031] Figure 5 for Figure 1 Top view of the .

[0032] Figure 6 It is an exploded view of a single adjustment unit in the utility model.

[0033] Among them: 1. Lower assembly of the hoist; 2. Casing; 3. Sprocket; 4. Connecting rod; 5. Main shaft; 6. Adjustment unit; 7. Guide plate; 8. Adjustment shaft; 9. End plate; 901. First mounting hole; 10. Bearing seat; 1001. Upper connecting seat; 11. First adjustment seat; 12. Second adjustment seat; 13. Rotary bearing; 14. Cover plate; 15. Pointer; 16. Scale; 17. First nut; 18. Second nut; 19. Limit block; 20. Adjustment spring; 21. First limit ring plate; 22. Second limit ring plate; 23. Locking nut. DETAILED DESCRIPTION

[0034] The specific implementation of the present utility model is described below in conjunction with the accompanying drawings.

[0035] The structure and functions of the utility model are as follows:

[0036] like Figure 1-Figure 6 As shown, a lower chain adjustment structure of an elevator includes a casing 2 and a main shaft 5 of a lower assembly of the elevator. The main shaft 5 is installed in cooperation with the casing 2 through an adjustment component. The adjustment component includes two symmetrically arranged adjustment units 6; the structure of a single adjustment unit 6 is as follows: it includes a first adjustment seat 11 fixed on the outer wall of the casing 2, and an end plate 9 located below the first adjustment seat 11, the back of the end plate 9 is fixed on the outer wall of the casing 2, and the front of the end plate 9 is fixed with a second adjustment seat 12, and the first adjustment seat 11 and the second adjustment seat 12 are arranged from top to bottom along the height direction of the elevator; it also includes an adjustment shaft 8, The adjusting shaft 8 passes through the first adjusting seat 11 and the second adjusting seat 12 at the same time, and the end is fixed to the bearing seat 10. The bearing seat 10 is arranged below the second adjusting seat 12. The bearing seat 10 cooperates with the outer ring of the rotating bearing 13. At the same time, the inner ring of the rotating bearing 13 cooperates with the outer circumferential surface of the main shaft 5. A pointer 15 is fixed on the bearing seat 10, and the pointer 15 cooperates with the scale 16. A spring mechanism is also installed on the outer circumferential surface of the adjusting shaft 8. The spring mechanism is used to adjust the force applied to the bearing seat 10 by the adjusting shaft 8, so that the pointers 15 in the two adjustment units 6 point to the same position on the corresponding scale 16.

[0037] In the present invention, a plurality of sprockets 3 are fixed at intervals on the outer circumference of the main shaft 5. In the present invention, the sprocket 3 in the lower assembly 1 of the elevator is a driven sprocket, which cooperates with the driving sprocket in the upper assembly of the elevator to transport the lifting carrier through the chain; two adjacent sprockets 3 are connected by a connecting rod 4. The connecting rod 4 can improve the overall structural stability of the chain transmission device.

[0038] Since the sprocket 3 is installed on the main shaft 5, and when the chain on the sprocket 3 is loose, the force of the chain on the sprocket 3 changes, which causes the force of the sprocket 3 on the main shaft 5 to change, and then the main shaft 5 drives the bearing seat 10 to deviate, and the deflection movement of the bearing seat 10 is fed back through the pointer 15; the looseness of the chain in the lower assembly 1 of the elevator can also be judged according to the pointing position of the pointer 15 on the corresponding scale 16, thereby facilitating adjustment, reducing maintenance time, and eliminating the need to rely on manual experience, saving labor costs.

[0039] The single adjusting shaft 8 is fastened to the corresponding first adjusting seat 11 through the first nut 17; the single adjusting shaft 8 is fastened to the corresponding second adjusting seat 12 through the second nut 18. By providing the first nut 17 and the second nut 18, the adjusting shaft 8, the first adjusting seat 11, and the second adjusting seat 12 are fastened and connected to ensure the connection performance and the structural stability of the lower assembly 1 of the hoist.

[0040] An upper connecting seat 1001 is provided on the top of a single bearing seat 10, and the single upper connecting seat 1001 is fixed to the adjusting shaft 8 through a stop block 19. The bearing seat 10 is matched with the adjusting shaft 8 through the upper connecting seat 1001, and the stop block 9 is placed in the upper connecting seat 1001, so that the bearing seat 10 and the corresponding adjusting shaft 8 are fixedly connected.

[0041] The structure of the single spring mechanism is as follows: it includes an adjustment spring 20 sleeved on the outer circumferential surface of the adjustment shaft 8, one end of the adjustment spring 20 is connected to the first limiting ring plate 21, and the other end is connected to the second limiting ring plate 22, the top end surface of the first limiting ring plate 21 is in contact with the bottom end surface of the first adjustment seat 11, so that the first limiting ring plate 21 is limited by the first adjustment seat 11, and the bottom end surface of the second limiting ring plate 22 is in contact with the top end surface of the locking nut 23, so that the second limiting ring plate 22 is limited by the locking nut 23. By setting the spring mechanism, the adjustment shaft 8 can have an initial force on the bearing seat 10; in addition, when the chain is loose and the main shaft 5 is subjected to unbalanced force, the installation position of the second limiting ring plate 22 can be adjusted to adjust the force of the adjustment shaft 8 on the corresponding bearing seat 10, so that the main shaft 5 is in a balanced force state again.

[0042] A single scale 16 is fixed on the housing 2. The scale 16 is used to cooperate with the pointer 15 so that the operator can timely confirm the stress condition of the main shaft 5 and the looseness of the chain according to the indication of the pointer 15.

[0043] An array of guide plate groups is also fixed on the outer wall of the housing 2, and the guide plate groups correspond to the bearing seats 10 one by one; a single guide plate group includes two guide plates 7, which are respectively arranged on both sides of the corresponding bearing seat 10, so as to guide the movement of the corresponding bearing seat 10. By providing the guide plates 7, the movement of the corresponding bearing seat 10 can be guided, so that the bearing seat 10 moves along the height direction of the hoist, and the bearing seat 10 is prevented from shaking in other directions.

[0044] A cover plate 14 is fixed to the outer side of a single bearing seat 10. The cover plate 14 covers the rotary bearing 13 in the corresponding bearing seat 10 to protect it; in addition, the pointer 10 is fixed to the corresponding bearing seat 10 through the cover plate 14.

[0045] The working process of the utility model is as follows:

[0046] Initially, the pointers 15 in the two adjustment units 6 both point to the zero position of the corresponding scale 16;

[0047] like Figure 3 As shown, the two pointers 15 are defined as the left pointer and the right pointer respectively; the two sprockets 3 are defined as the left sprocket and the right sprocket respectively; the left pointer can correspond to feedback on the looseness of the chain on the left sprocket; the right pointer can correspond to feedback on the looseness of the chain on the right sprocket;

[0048] When the pointing position of one of the pointers 15 on the corresponding scale 16 deviates from the zero position, or when the pointing positions of both pointers 15 on the corresponding scale 16 deviate from the zero position, it indicates that the spindle 15 is in an unbalanced force state (i.e., the spindle 5 is tilted);

[0049] First, by adjusting the installation position of the second limit ring plate 22 on the adjusting shaft 8, the elastic force of the adjusting spring 20 is adjusted, thereby adjusting the force of the adjusting shaft 8 on the bearing seat 10, so that the pointers 15 in the two adjustment units 6 point to the same position on the corresponding scale 16 (not necessarily to the zero position at this time), so that the main shaft 5 is in a force balance state again;

[0050] When the chain is slightly loose, adjust it until the main shaft 5 is in a balanced force state again;

[0051] When the chain is loosened seriously (i.e. the pointer 15 deviates too much from the zero position of the corresponding scale 16), the tensioning device can be adjusted according to the pointing positions of the left and right pointers on the corresponding scale 16 to re-tighten the corresponding chain;

[0052] The specific adjustment methods are:

[0053] When the indicated position of the left pointer is above the zero position of the corresponding scale 16, adjust the tensioning device on the chain of the left sprocket counterclockwise;

[0054] When the indicated position of the left pointer is below the zero position of the corresponding scale 16, adjust the tensioning device on the chain of the left sprocket clockwise;

[0055] Until the indicated position of the left pointer is readjusted to the zero position corresponding to the scale 16;

[0056] When the chain on the right sprocket is loose, the steps of adjusting the chain on the right sprocket according to the right pointer are similar to the steps of adjusting the chain on the left sprocket according to the left pointer, which will not be repeated here;

[0057] The chain in the hoist is re-tensioned by re-adjusting the indicated positions of the left and right pointers to the zero position of the corresponding scale 16.

[0058] The above description is an explanation of the utility model, not a limitation of the utility model. The scope of the utility model is defined by the claims. Any form of modification can be made within the protection scope of the utility model.

Claims

1. A hoist lower chain adjustment structure, characterized in that: It comprises a casing (2) and a main shaft (5) of a lower assembly of a hoist, wherein the main shaft (5) is mounted in cooperation with the casing (2) via an adjustment assembly, and the adjustment assembly comprises two symmetrically arranged adjustment units (6); The structure of a single adjustment unit (6) is as follows: it comprises a first adjustment seat (11) fixed on the outer wall surface of the casing (2), and an end plate (9) located below the first adjustment seat (11), the back surface of the end plate (9) being fixed on the outer wall surface of the casing (2), and the front surface of the end plate (9) being fixed with a second adjustment seat (12), and the first adjustment seat (11) and the second adjustment seat (12) being arranged with a gap from top to bottom along the height direction of the elevator; The machine tool further comprises an adjusting shaft (8), wherein the adjusting shaft (8) passes through the first adjusting seat (11) and the second adjusting seat (12) at the same time, and the end thereof is fixed to the bearing seat (10), the bearing seat (10) is arranged below the second adjusting seat (12), the bearing seat (10) cooperates with the outer ring of the rotating bearing (13), and at the same time, the inner ring of the rotating bearing (13) cooperates with the outer circumferential surface of the main shaft (5), and a pointer (15) is fixed on the bearing seat (10), and the pointer (15) cooperates with the scale (16); A spring mechanism is also mounted on the outer circumferential surface of the adjusting shaft (8), and the spring mechanism is used to adjust the force applied by the adjusting shaft (8) to the bearing seat (10), so that the pointers (15) in the two adjustment units (6) point to the same position on the corresponding scale (16).

2. The lower chain adjustment structure of the hoist according to claim 1, characterized in that: The single adjustment shaft (8) is fastened to the corresponding first adjustment seat (11) via a first nut (17).

3. The lower chain adjustment structure of the hoist according to claim 1, characterized in that: The single adjustment shaft (8) is fastened to the corresponding second adjustment seat (12) via a second nut (18).

4. The lower chain adjustment structure of the hoist according to claim 1, characterized in that: An upper connecting seat (1001) is arranged on the top of the single bearing seat (10), and the single upper connecting seat (1001) is fixed to the adjusting shaft (8) via a limiting block (19).

5. The lower chain adjustment structure of the hoist according to claim 1, characterized in that: The structure of the single spring mechanism is as follows: it comprises an adjusting spring (20) sleeved on the outer circumferential surface of the adjusting shaft (8), one end of the adjusting spring (20) is connected to a first limiting ring plate (21), and the other end is connected to a second limiting ring plate (22), the top end surface of the first limiting ring plate (21) is in contact with the bottom end surface of the first adjusting seat (11), so that the first limiting ring plate (21) is limited by the first adjusting seat (11), and the bottom end surface of the second limiting ring plate (22) is in contact with the top end surface of the locking nut (23), so that the second limiting ring plate (22) is limited by the locking nut (23).

6. The lower chain adjustment structure of the hoist according to claim 1, characterized in that: A single scale (16) is fixed on the casing (2).

7. The lower chain adjustment structure of a hoist according to claim 1, characterized in that: An array of guide plate groups is also fixed on the outer wall surface of the housing (2), and the guide plate groups correspond to the bearing seats (10) one by one; The single guide plate group comprises two guide plates (7), and the two guide plates (7) are respectively arranged on both sides of the corresponding bearing seat (10), so as to guide the movement of the corresponding bearing seat (10).

8. The lower chain adjustment structure of a hoist according to claim 1, characterized in that: A cover plate (14) is fixed on the outer side of the single bearing seat (10).

9. The lower chain adjustment structure of a hoist according to claim 1, characterized in that: A plurality of sprocket wheels (3) are fixed at intervals on the outer circumferential surface of the main shaft (5).

10. The lower chain adjustment structure of the hoist according to claim 9, characterized in that: Two adjacent sprocket wheels (3) are connected via a connecting rod (4).

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