Scraper conveyer and tail and sealing tensioning mechanism thereof

Abstract

The utility model belongs to the technical field of scraper conveying devices. The sealing and tensioning mechanism is characterized by comprising an outer sleeve; the inner sleeve is arranged in the outer sleeve in a sleeving manner; the tensioning lead screw is arranged in the outer sleeve in a sleeved mode, and the tensioning lead screw is in threaded connection with the inner sleeve; the oil injection part is arranged on the outer sleeve and used for providing lubricating oil for the tensioning lead screw. The scraper conveyor tail comprises a tail shell, and the sealing tensioning mechanism is arranged on the tail shell. The scraper conveyer comprises the machine tail. The sleeve thrust screw rod tensioning mechanism is used for solving the technical problem of tensioning failure caused by lubrication failure of an existing sleeve thrust screw rod tensioning mechanism.

Description

Technical Field

[0001] The utility model belongs to the technical field of scraper conveyor devices, and particularly relates to a sealing and tensioning mechanism, a tail of a scraper conveyor including the above sealing and tensioning mechanism, and a scraper conveyor including the above tail of the scraper conveyor. Background Art

[0002] A scraper conveyor is a transportation machine composed of a head, a tail, an intermediate section, a chain, a sprocket, etc. During use, the position of the sprocket needs to be frequently adjusted to achieve chain tensioning. The existing tensioning devices of scraper conveyors are divided into two modes: external screw rod tensioning and sleeve thrust screw rod tensioning. For the external screw rod tensioning, the screw rod is exposed to the air for a long time, exposed to sunlight and rain, and is prone to rust. Moreover, the exposed thread is easily damaged by foreign objects, affecting the normal adjustment of the screw rod, and seriously affecting the appearance and service life of the equipment. For the sleeve thrust screw rod tensioning mechanism, since the screw rod and nut are built-in, and the inner and outer sleeves are not sealed and are prone to water and dust ingress. After long-term use, when the lubricating oil applied during initial assembly dries or fails, it is very difficult to lubricate and maintain, resulting in screw rod rust and locking, unable to adjust the tension, and having a short service life. Summary of the Utility Model

[0003] The purpose of the utility model is to provide a sealing and tensioning mechanism to solve the technical problem that the tensioning fails due to the lubrication failure of the existing sleeve thrust screw rod tensioning mechanism.

[0004] To solve the above technical problems, the utility model adopts the following technical solutions. The sealing and tensioning mechanism is characterized by including:

[0005] An outer sleeve;

[0006] An inner sleeve sleeved inside the outer sleeve;

[0007] A tensioning screw rod sleeved inside the outer sleeve, and the tensioning screw rod is threadedly connected with the inner sleeve;

[0008] An oil injection part arranged on the outer sleeve for providing lubricating oil to the tensioning screw rod.

[0009] In the utility model, the outer side of the outer sleeve is drilled and tapped, and an oil injection part is installed. New lubricating grease is injected into the sealed cavity between the inner and outer sleeves through the oil injection part, so that the inside of the cavity is always in a lubricated state, the whole structure is more labor-saving to adjust, and the service life is longer.

[0010] To solve the technical problem that the combined use of new and old grease affects the lubrication performance, the present utility model adopts the following technical solution. An oil discharge member is provided on the outer sleeve tube for discharging the waste lubricating oil in the outer sleeve tube. In the present utility model, an oil discharge member is installed on the outer sleeve tube, and the oil discharge member is preferably an oil discharge hole plug. During the later maintenance process, the oil discharge member is opened, and new lubricating grease is injected into the sealed cavity between the inner and outer sleeve tubes through the oil injection member. The waste grease is discharged through the oil discharge hole, so that the inside of the cavity is always in a clean and lubricated state. The adjustment of the whole structure is more labor-saving and has a longer service life.

[0011] To solve the technical problem that rainwater and dust enter the sealed cavity between the inner and outer sleeves, the present utility model adopts the following technical solution. A sealing assembly is provided between the inner sleeve tube and the outer sleeve tube. The outer sleeve tube and the inner sleeve tube are sealed by an O-ring, and a sealed structure is formed between the two, which can effectively prevent rainwater and dust from entering the inside of the sealed cavity.

[0012] To solve the technical problem that it is impossible to visually observe the tensioning stroke of the lead screw and prevent the lead screw from over-traveling and disengaging from the inner sleeve of the lead screw, the present utility model adopts the following technical solution. An internal threaded tube is provided in the inner sleeve tube connected to the tensioning lead screw, and the internal threaded tube is connected to the tensioning lead screw;

[0013] A first limiting assembly is provided at the end of the tensioning lead screw close to the inner sleeve tube. When the tensioning lead screw reaches the limit stroke, the tensioning lead screw is locked, which effectively ensures the integrity of the whole tensioning mechanism, effectively avoids the inability to visually observe the tensioning stroke of the lead screw, and effectively prevents the lead screw from over-traveling and disengaging from the inner sleeve of the lead screw.

[0014] To solve the technical problem of how the first limiting assembly is realized, the present utility model adopts the following technical solution. The first limiting assembly includes a limiting plate, and the limiting plate is arranged on the tensioning lead screw via a connecting member, and the limiting plate is in clearance fit with the inner sleeve tube. During the tensioning process, as the tensioning lead screw rotates, the inner sleeve tube gradually moves away from the outer sleeve tube, the limiting plate contacts the internal threaded tube, and when the tensioning lead screw reaches the stroke limit, the tensioning lead screw is locked.

[0015] To further solve the technical problem of the left and right movement of the tensioning lead screw, the present utility model adopts the following technical solution. A second limiting assembly is provided between the tensioning lead screw and the outer sleeve for preventing the tensioning lead screw from moving left and right.

[0016] To solve the technical problem of how the second limiting assembly is realized, the present utility model adopts the following technical solution. The second limiting assembly includes:

[0017] A positioning convex ring is provided at the end of the tensioning lead screw;

[0018] A limiting sleeve is arranged inside the outer sleeve. The positioning convex ring is sleeved inside the limiting sleeve, and the limiting sleeve limits the positioning convex ring.

[0019] A limiting nut is arranged at the end of the tensioning screw rod. The limiting nut is located outside the positioning ring, and there is a clearance fit between the limiting nut and the outer sleeve pipe.

[0020] The limiting nut and the tensioning screw rod are provided with positioning bolt holes and fixed by bolts. A certain clearance needs to be reserved between the limiting nut and the outer sleeve pipe to prevent the screw rod from being locked and unable to be adjusted. A limiting sleeve is welded to the outer sleeve pipe. The tensioning screw rod is stuck inside the limiting sleeve through the limiting nut and the positioning convex ring, effectively preventing the tensioning screw rod from moving left and right.

[0021] To solve the technical problem of how the inner sleeve is installed on the equipment that needs to be tensioned, the present utility model adopts the following technical solution. A second mounting plate is arranged on the inner sleeve.

[0022] To solve the technical problem of how the outer sleeve is installed on the equipment that needs to be tensioned, the present utility model adopts the following technical solution. A first mounting plate is arranged on the outer sleeve.

[0023] To solve the technical problem of insufficient lubrication between the tensioning screw rod and the inner sleeve (the internal threaded pipe on the inner sleeve), the present utility model adopts the following technical solution. The oil injection part and the oil drainage part are located on both sides of the first mounting plate.

[0024] The second object of the present utility model is to provide a tail of a scraper conveyor, including a tail housing. A tail wheel is arranged inside the tail housing. The tail wheel is slidably arranged on the tail housing via a sliding bearing seat. It is characterized in that the above-mentioned sealing and tensioning mechanism is arranged on the tail housing.

[0025] To solve the technical problem of how the sealing and tensioning mechanism is connected to the tail housing and the sliding bearing seat, the present utility model adopts the following technical solution. The outer sleeve is arranged on the tail housing;

[0026] The inner sleeve is arranged on the sliding seat.

[0027] The third object of the present utility model is to provide a scraper conveyor, including the above-mentioned tail. Description of the Drawings

[0028] Figure 1 is a three-dimensional view of the sealing and tensioning mechanism of the present utility model Figure 1 ;

[0029] Figure 2 is a cross-sectional view of the sealing and tensioning mechanism of the present utility model;

[0030] Figure 3 isFigure 2 Enlarged view of A;

[0031] Figure 4 It is a schematic diagram of the effective tensioning stroke of the tensioning screw rod of the sealing and tensioning mechanism of the present utility model;

[0032] Figure 5 It is a schematic diagram of the outer sleeve of the sealing and tensioning mechanism of the present utility model;

[0033] Figure 6 It is a schematic diagram of the inner sleeve of the sealing and tensioning mechanism of the present utility model;

[0034] Figure 7 It is a top view of the tail of the scraper conveyor of the present utility model;

[0035] Figure 8 It is a three-dimensional view of the tail of the scraper conveyor of the present utility model;

[0036] Figure 9 It is a schematic diagram of the side plate and pressing plate of the tail housing of the tail of the scraper conveyor of the present utility model;

[0037] Reference numerals:

[0038] 10 Sealing and tensioning mechanism;

[0039] 100 Outer sleeve; 101 First mounting plate; 102 Oil injection hole; 103 Oil drain hole; 104 Sealing ring mounting hole;

[0040] 200 Inner sleeve; 201 Second mounting plate; 202 Internal thread tube;

[0041] 300 Tensioning screw rod;

[0042] 410 Oil injection part; 420 Oil drain part;

[0043] 500 Sealing assembly;

[0044] 610 First limiting assembly; 611 Limiting plate; 612 Connecting part;

[0045] 620 Second limiting assembly; 621 Positioning convex ring; 622 Limiting sleeve; 623 Limiting nut;

[0046] 700 Tail of the scraper conveyor; 701 Side plate of the tail housing; 702 Center shaft of the tail wheel; 703 Sliding bearing seat; 704 Flange of the side plate of the tail housing; 705 Pressing plate. Detailed implementation manners

[0047] The present utility model will be further clarified below in conjunction with the accompanying drawings and specific implementation manners.

[0048] Embodiment 1

[0049] AsFigures 1-6 As shown, the sealing and tensioning mechanism 10 includes an outer sleeve 100, an inner sleeve 200, a tensioning screw rod 300, and an oil injection part 400.

[0050] In one embodiment, a first mounting plate 101 is welded to the outer sleeve 100. The first mounting plate 101 is perpendicular to the outer sleeve 100. The first mounting plate 101 can be circular, square, or diamond-shaped. Connecting holes are evenly distributed on the first mounting plate 101.

[0051] An oil injection hole 102 is machined on the outer sleeve 100. The oil injection part 410 is installed on the oil injection hole 102 of the outer sleeve 100 for supplying lubricating oil to the tensioning screw rod. The oil injection part is selected as a standard oil cup of M10×1, which is consistent with the oil cup supporting the bearing seat and is convenient for maintenance;

[0052] An oil drain hole 103 is machined on the outer sleeve 100. The oil drain part 420 is installed on the oil drain hole 103 of the outer sleeve 100 for discharging the waste lubricating oil in the outer sleeve. The oil drain part adopts a national standard plug screw.

[0053] In one embodiment, the oil injection hole 102 and the oil drain hole 103 are located on both sides of the first mounting plate 101, so that the oil injection part 410 and the oil drain part 420 are located on both sides of the first mounting plate 101.

[0054] In the present utility model, an oil injection part and an oil drain part are arranged on the screw rod outer sleeve of the sleeve thrust screw rod tensioning mechanism, so that the lubricating grease in the screw rod sleeve can be replaced at any time, avoiding the internal grease from drying out and rusting.

[0055] The inner sleeve 200 is sleeved inside the outer sleeve 100. In one embodiment, a second mounting plate 201 is provided on the inner sleeve 200.

[0056] The tensioning screw rod 300 is sleeved inside the outer sleeve 100, and the tensioning screw rod 300 is threadedly connected to the inner sleeve 200.

[0057] In one embodiment, to avoid being unable to visually observe the tensioning stroke of the tensioning screw rod and prevent the tensioning screw rod from over-traveling and detaching from the screw rod inner sleeve, an internal threaded tube 202 is arranged inside the inner sleeve 200 connected to the tensioning screw rod 300, and the internal threaded tube 202 is connected to the tensioning screw rod 300. Specifically, an internal threaded tube 202 matching the tensioning screw rod 300 is welded inside the inner sleeve 200. A first limiting component 610 is arranged at the end of the tensioning screw rod 300 close to the inner sleeve 200.

[0058] Specifically, the first limiting component 610 includes a limiting plate 611 and a connecting member 612. The limiting plate 611 is arranged on the tensioning lead screw via the connecting member 612. The limiting plate 611 has a clearance fit with the inner sleeve 200. To avoid being unable to visually observe the tensioning stroke of the tensioning lead screw and prevent the tensioning lead screw from over-traveling and detaching from the lead screw inner sleeve, a limiting plate is added at the end of the tensioning lead screw, which can lock the lead screw at the limit stroke of the lead screw, effectively ensuring the integrity of the entire tensioning mechanism. During the tensioning process, as the tensioning lead screw 300 rotates, the inner sleeve 200 gradually moves away from the outer sleeve 100, and the limiting plate 611 contacts the internal thread tube 202. When the tensioning lead screw reaches the limit of its stroke, the tensioning lead screw is locked.

[0059] In one embodiment, to prevent the tensioning lead screw from moving left and right, a second limiting component 620 is arranged between the tensioning lead screw and the outer sleeve for preventing the tensioning lead screw from moving left and right.

[0060] Specifically, the second limiting component includes a positioning convex ring 621, a limiting sleeve 622, and a limiting nut 623. The positioning convex ring 621 is arranged at the end of the tensioning lead screw 300. The limiting sleeve 622 is arranged inside the outer sleeve. The positioning convex ring 621 is sleeved inside the limiting sleeve 622, and the limiting sleeve 622 limits the positioning convex ring 621. The limiting nut 623 is arranged at the end of the tensioning lead screw, and the limiting nut is located outside the positioning ring. There is a clearance fit between the limiting nut and the outer sleeve.

[0061] The limiting nut and the tensioning lead screw are provided with positioning bolt holes and fixed by bolts. A certain clearance needs to be reserved between the limiting nut and the outer sleeve to prevent the lead screw from being locked and unable to be adjusted. A limiting sleeve is welded to the outer sleeve. The tensioning lead screw is stuck inside the limiting sleeve through the limiting nut and the positioning convex ring, effectively preventing the tensioning lead screw from moving left and right.

[0062] A positioning convex ring 621 is welded at one end of the tensioning lead screw 300, and a limiting plate 611 is installed at the other end with bolts. The two ends are limited. The effective stroke of the tensioning lead screw 300 is between the positioning convex ring 621 and the limiting plate 611, effectively preventing the tensioning lead screw 300 from detaching from the inner sleeve 200.

[0063] In one embodiment, to prevent rainwater and dust from entering the inside of the sealed cavity, a sealing component 500 is arranged between the inner sleeve 200 and the outer sleeve 100. The sealing component 500 includes a sealing ring installation groove and a sealing ring. There is a sealing ring installation groove 104 on the inner side wall of the outer sleeve 100. The sealing ring installation groove can also be processed on the outer side wall of the inner sleeve 200. The sealing ring is preferably an O-ring. The outer sleeve and the inner sleeve are sealed by an O-ring, forming a sealed structure between the two to ensure the sealing performance of the entire sleeve cavity and prevent internal grease leakage; it can effectively prevent rainwater and dust from entering the inside of the sleeve sealed cavity.

[0064] All components of the present utility model are made of commonly used materials in the market. The present utility model adopts an assembled connection, which is convenient for installation, fast, ensures the convenience of use and maintenance, and can also ensure the final installation effect. The sealing and tensioning mechanism of the present utility model can be filled with lubricating grease, which solves the adverse effects of easy rusting of the screw tensioning of the conveying equipment and the problem of nut locking caused by easy bruising of the external screw rod.

[0065] During the use of the present utility model, it achieves the functions of internal dust and waterproof, ensures the lubrication effect of the screw rod and the rapidity of daily inspection, maintenance and installation by the user, guarantees the stability of equipment use, and prolongs the service life of the tensioning mechanism.

[0066] Embodiment 2

[0067] As Figures 7-9 shown, the tail 700 of the scraper conveyor includes a tail housing, and a tail wheel is installed in the tail housing. Both ends of the central shaft 702 of the tail wheel are supported on the sliding bearing seats 703, and the sliding bearing seats 703 are slidably arranged on the tail housing, and the sealing and tensioning mechanism 10 of any one of Embodiment 1 is arranged on the tail housing.

[0068] In one embodiment, the outer sleeve 100 is arranged on the tail housing 701. Specifically, the first mounting plate 101 of the outer sleeve 100 is flange-connected to the tail housing. The inner sleeve 200 is arranged on the sliding seat 703. Specifically, the second mounting plate 201 of the inner sleeve 200 is flange-connected to the sliding seat 703.

[0069] Specifically, the outer sleeve 100 is fixedly bolted to the flange 704 of the side plate of the tail housing through the first mounting plate 101. A long circular hole is opened on the side plate 701 of the tail housing and a sliding track is welded. The sliding seat 703 is fixed on the side plate 701 of the tail housing with a pressing plate 705. The inner sleeve 200 is fixedly bolted to the sliding bearing seat 703 through the second mounting plate 201.

[0070] Rotate the head of the tensioning screw rod 300, and the inner sleeve 200 can slide freely back and forth on the tensioning screw rod 300, and at the same time drive the two side sliding bearing seats 703 and the central shaft 702 of the tail wheel to slide freely back and forth on the side plate 701 of the tail housing to achieve the tensioning effect.

[0071] Embodiment 3

[0072] The scraper conveyor includes the tail 700 of the scraper conveyor described in any one of Embodiment 2.

[0073] Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements on some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model, and the content not described in detail in this specification belongs to the prior art well-known to those skilled in the art.

Claims

1. Sealing and tensioning mechanism, characterized in that, Comprising: An outer sleeve; An inner sleeve, sleeved inside the outer sleeve; A tensioning screw rod, sleeved inside the outer sleeve, and the tensioning screw rod is threadedly connected to the inner sleeve; An oil injection member, provided on the outer sleeve, for supplying lubricating oil to the tensioning screw rod.

2. The sealing and tensioning mechanism according to claim 1, characterized in that, An oil drain member is provided on the outer sleeve for discharging waste lubricating oil inside the outer sleeve.

3. The sealing and tensioning mechanism according to claim 1, characterized in that, A sealing assembly is provided between the inner sleeve and the outer sleeve.

4. The sealing and tensioning mechanism according to claim 1, characterized in that, An internal threaded tube is provided inside the inner sleeve connected to the tensioning screw rod, and the internal threaded tube is connected to the tensioning screw rod; A first limiting assembly is provided at the end of the tensioning screw rod close to the inner sleeve.

5. The sealing and tensioning mechanism according to claim 4, characterized in that, The first limiting assembly includes a limiting plate, the limiting plate is provided on the tensioning screw rod via a connecting member, and the limiting plate has a clearance fit with the inner sleeve.

6. The sealing and tensioning mechanism according to claim 1, characterized in that, A second limiting assembly is provided between the tensioning screw rod and the outer sleeve for preventing the tensioning screw rod from moving left and right.

7. The sealing and tensioning mechanism according to claim 6, characterized in that, The second limiting assembly includes: A positioning convex ring, provided at the end of the tensioning screw rod; A limiting sleeve, provided inside the outer sleeve, the positioning convex ring is sleeved inside the limiting sleeve, and the limiting sleeve limits the positioning convex ring; A limiting nut, provided at the end of the tensioning screw rod, the limiting nut is located outside the positioning ring, and there is a clearance fit between the limiting nut and the outer sleeve.

8. The sealing and tensioning mechanism according to claim 1, characterized in that, A second mounting plate is provided on the inner sleeve.

9. The sealing and tensioning mechanism according to claim 2, characterized in that, A first mounting plate is provided on the outer sleeve.

10. The sealing and tensioning mechanism according to claim 9, characterized in that, The oil injection member and the oil drain member are located on both sides of the first mounting plate.

11. Tail of scraper conveyor, including a tail housing, wherein a tail wheel is arranged inside the tail housing, and the tail wheel is slidably arranged on the tail housing via a sliding bearing block, characterized in that, The sealing and tensioning mechanism according to any one of claims 1-10 is provided on the tail housing of the machine.

12. The scraper conveyor tail according to claim 11, characterized in that, The outer sleeve is provided on the tail housing of the machine; The inner sleeve is provided on the sliding seat.

13. Scraper conveyor, characterized in that, Including the wrapping type scraper conveyor tail according to claim 11 or 12.

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