Chain tensioning mechanism for an apron conveyor

Abstract

The utility model discloses a kind of chain-tightening mechanisms of scraper conveyor, including permanent magnet motor and the integrated speed reducer connected therewith, integrated speed reducer is integrated with one-stage planetary carrier gear ring, mounting seat and the shell installed on the mounting seat are installed on integrated speed reducer, transmission shaft is installed on the shell, abutment gear and the shift fork for pushing abutment gear are installed on the transmission shaft, shift fork is fixed on transmission shaft;Brake disc and electric cylinder are fixedly installed in the shell, limit hole is opened on the brake disc, stop pin that can be detached into the limit hole is eccentric and arranged on the abutment gear, the telescopic rod of electric cylinder is connected with the shift fork, when abutment gear moves towards brake disc and engages with one-stage planetary carrier gear ring;According to chain-tightening action, one-stage planetary carrier gear ring is adjusted in braking or release state.

Description

TECHNICAL FIELD

[0001] The utility model relates to scraper conveyor technical field especially relates to a scraper conveyor's chain tensioning mechanism. BACKGROUND

[0002] The power of the scraper conveyor is transmitted through the transmission chain, and the transmission chain will be loose after running for a period of time, so the transmission chain needs to be tensioned. Generally, a permanent magnet motor and a planetary reducer connected with the permanent magnet motor are integrated in the scraper conveyor. The permanent magnet motor drives the new type of reducer to tension the transmission chain. The rotation direction of the permanent magnet motor is actually opposite to that of the power mechanism of the scraper conveyor. Specifically, the planetary reducer is connected with the tensioning sprocket to realize transmission when tensioning adjustment is performed. After tensioning adjustment, the planetary reducer needs to be stopped to avoid being reversed by the power mechanism of the scraper conveyor.

[0003] The existing stop structure mainly stops the gear in the planetary reducer through manual operation, which needs to be operated on site and is not convenient to operate. UTILITY MODEL CONTENTS

[0004] The utility model aims at providing a scraper conveyor's chain tensioning mechanism, which can realize non-site operation and improve the operation convenience by improving the stop structure of the gear in the reducer.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical scheme:

[0006] A scraper conveyor's chain tensioning mechanism, comprising a permanent magnet motor and an integrated reducer connected therewith, wherein a primary planetary carrier gear ring is integrated in the integrated reducer; an installation seat is installed on the integrated reducer, and a housing is installed on the installation seat; a transmission shaft is installed on the housing; a butt gear and a shift fork for pushing the butt gear are installed on the transmission shaft, and the shift fork is fixed on the transmission shaft; a brake disc and an electric cylinder are fixedly installed in the housing; a limiting hole is formed in the brake disc; a stop pin is eccentrically arranged on the butt gear and can be detached into the limiting hole; and the extension rod of the electric cylinder is connected with the shift fork, and the butt gear is engaged with the primary planetary carrier gear ring when moving towards the brake disc.

[0007] Preferably, the butt gear comprises a cam, the cam has an eccentric part and a rotating part, a semicircle of engagement teeth are arranged on the circumferential surface of the rotating part, and the stop pin is fixed on the eccentric part.

[0008] Preferably, the shift fork comprises a sliding plate and a bent part provided on the sliding plate, the bent part and the sliding plate form a limiting cavity, the width of the limiting cavity is greater than the thickness of the cam, and the sliding plate is fixedly installed on the transmission shaft.

[0009] Preferably, the limiting hole is an arc-shaped strip hole.

[0010] Preferably, two end covers are fixedly installed on the shell, and the transmission shaft is slidingly installed on the two end covers.

[0011] Preferably, a bearing is installed on the transmission shaft, and the abutting gear is installed on the bearing.

[0012] Preferably, a through slot is formed in the mounting seat, the abutting gear passes through the through slot, and the width of the through slot is greater than the length of the stop pin.

[0013] Preferably, the shift fork is an integrally formed structure.

[0014] Beneficial effects:

[0015] The shift fork is driven by the electric cylinder to move the abutting gear, and after moving towards the brake disc, the stop pin can be inserted into the limiting hole, so that the brake disc limits the rotation of the abutting gear, and when the abutting gear moves to the limiting position, it is engaged with the primary planetary carrier gear, thereby limiting the internal gear set, ensuring that the internal gear set does not rotate synchronously when the permanent magnet motor drives the tensioning sprocket to rotate, and realizing smooth tensioning process; the improved structure can be used without disassembling the shell, and the electric cylinder and the control part of the permanent magnet motor can be integrated together by controlling the action of the electric cylinder. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 is a structural schematic view of the utility model embodiment;

[0017] Figure 2 is a structural schematic view of the stop cooperation state in the utility model embodiment;

[0018] Figure 3 is a structural schematic view of the abutting gear in the utility model embodiment;

[0019] Figure 4 is a structural schematic view of the shift fork in the utility model embodiment;

[0020] In Figures 1 to 4 , the correspondence between component names or lines and figure numbers is as follows:

[0021] The integral speed reducer 1, the primary planetary carrier gear 2, the mounting seat 3, the shell 4, the transmission shaft 5, the abutting gear 6, the cam 61, the eccentric part 62, the rotating part 63, the meshing tooth 64, the shift fork 7, the sliding plate 71, the bent part 72, the brake disc 8, the electric cylinder 9, the limiting hole 10, the stop pin 11, the end cover 12, the through slot 13. DETAILED DESCRIPTION

[0022] The technical solutions in the embodiments of the utility model will be apparently and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments.

[0023] Referring to Figures 1-4 The utility model discloses an embodiment proposes a kind of chain tensioning mechanism of scraper conveyor, including permanent magnet motor (not shown) and the integrated reducer 1 connected with it, integrated reducer 1 is integrated with one-stage planet carrier gear 2, integrated reducer 1 is transmitted to sprocket with the power of power part, and permanent magnet motor is mainly rotated to adjust sprocket and realizes transmission chain tensioning, during tensioning process, sprocket can drive one-stage planet carrier gear 2 inside synchronous rotation and cause tensioning operation failure, need to stop transmission part, i.e. mainly to the one-stage planet carrier gear 2 inside stop.

[0024] Specifically, mounting seat 3 is installed on the integrated reducer 1, and housing 4 is mounted on the mounting seat 3, transmission shaft 5 is mounted on the housing 4, and abutment gear 6 and yoke 7 for pushing abutment gear 6 are mounted on transmission shaft 5, yoke 7 is fixed on transmission shaft 5, brake disc 8 and electric cylinder 9 are fixedly installed in housing 4, limit hole 10 is formed in brake disc 8, stop pin 11 is eccentrically arranged on abutment gear 6 and can be pulled into limit hole 10, and the telescopic rod of electric cylinder 9 is connected with yoke 7, when abutment gear 6 moves towards brake disc 8, it is engaged with one-stage planet carrier gear 2. By pulling yoke 7 with electric cylinder 9 to slide, abutment gear 6 moves towards brake disc 8, stop pin 11 is inserted into limit hole 10, and abutment gear 6 is engaged with one-stage planet carrier gear 2, since brake disc 8 is fixed, one-stage planet carrier gear stop is realized, and when it is needed to release, yoke 7 moves away from brake disc 8 with abutment gear 6, and stop pin 11 is pulled out of limit hole 10. Thus, abutment gear 6 is driven to move relative to brake disc 8 to adjust whether one-stage planet carrier gear 2 is in the braking state, so that the tensioning adjustment of transmission chain is completed and then braked.

[0025] Specifically, in order to improve the stop force, the abutment gear 6 includes a cam 61, the cam 61 has an eccentric portion 62 and a rotating portion 63, the rotating portion 63 has a half-circle engaging tooth 64 on its peripheral surface, and the stop pin 11 is fixed on the eccentric portion 62. The engaging portion and the stop portion are eccentrically arranged. The cam 61 can realize stable stop of the abutment gear 6 to the one-stage planet carrier gear 2 in a small stop range. The engaging tooth 64 is used to match the one-stage planet carrier gear 2 for engagement.

[0026] Specifically, the movement of the mating gear 6 is realized by the fork 7, and the fork 7 comprises a sliding plate 71 and a bent portion 72 provided on the sliding plate 71, the bent portion 72 and the sliding plate 71 form a limiting cavity, the width of the limiting cavity is greater than the thickness of the cam 61, and the sliding plate 71 is fixedly installed on the transmission shaft 5; so as to realize the protection of the mating gear 6 by the sliding plate 71 and the bent portion 72, and ensure that the transmission shaft 5 slides relative to the shell 4 when the sliding plate 71 is pulled by the electric cylinder 9, so as to realize the movement of the mating gear 6 relative to the brake disc 8, and realize the synchronous adjustment of the limiting position and the release position.

[0027] And the whole fork 7 is an integral structure, which has good structural strength.

[0028] At the same time, in order to ensure that the stop pin 11 is stably inserted into the limiting hole 10 during the movement of the mating gear 6 by the primary planetary carrier gear 2, the limiting hole 10 is an arc-shaped slot, so as to ensure that the stop pin 11 can be reliably inserted into the limiting hole 10 during the movement of the mating gear 6 to the limiting state.

[0029] At the same time, two end covers 12 are fixedly installed on the shell 4, and the transmission shaft 5 is slidingly installed on the two end covers 12, so as to realize the support and guided sliding of the transmission shaft 5, and the sliding cavity provided in the end cover 12 has a depth greater than the movement distance of the mating gear 6, so as to prevent the transmission shaft 5 from being interfered when the mating gear 6 moves.

[0030] At the same time, a bearing is installed on the transmission shaft 5, and the mating gear 6 is installed on the bearing, so as to realize the rotation of the mating gear 6 when the mating gear 6 moves with the transmission shaft 5, and realize the stop of the mating gear 6 within the limiting range after the stop pin 11 is inserted into the limiting hole 10.

[0031] Specifically, a through slot 13 is formed in the mounting seat 3, the mating gear 6 passes through the through slot 13, and the width of the through slot 13 is greater than the length of the stop pin 11, so as to ensure the movement of the mating gear 6 and the meshing with the internal primary planetary carrier gear 2.

[0032] The embodiment mainly protects the structure for stopping or releasing the primary planetary carrier gear 2, and other specific action mechanisms for realizing the tensioning of the transmission chain are prior art.

[0033] In the utility model, unless another definite provision and limitation, the terms "mount", "link", "connect", "fix" and so on should do broad sense understanding, for example, can be fixed connection, also can be detachable connection, or be integrated; can be mechanical connection, also can be electrical connection; can be direct connection, also can through intermediate medium indirectly connect, can be two element internal communication or two element's mutual action relationship. For ordinary skilled person in the art, can understand the concrete meaning of above-mentioned term in the utility model according to specific circumstances.

[0034] In the description of the utility model, it needs to be explained that the orientation or position relationship indicated by the terms "center", "upper", "lower", "left", "right", "inner", "outer" and so on is based on the orientation or position relationship shown in the drawings, or is the orientation or position relationship of the utility model product when it is usually placed, which is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, so it should not be understood as a limitation on the utility model. In addition, the terms "first", "second" and so on are only used for distinguishing description, and should not be understood as indicating or implying relative importance.

[0035] It is obvious for those skilled in the art that the utility model is not limited to the details of the above exemplary embodiments, and can be realized in other specific forms without departing from the spirit or basic characteristics of the utility model. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting, and the scope of the utility model is defined by the appended claims rather than the above description, so it is intended to include all changes falling within the meaning and scope of the equivalent elements of the claims in the utility model. Any figure reference in the claims should not be regarded as limiting the involved claims.

Claims

1. A chain tensioning mechanism of a flight conveyor, comprising a permanent magnet motor and an integrated reducer (1) connected therewith, wherein a first planetary carrier gear (2) is integrated in the integrated reducer (1), characterized in that: a mounting seat (3) is mounted on the integrated reducer (1), and a housing (4) is mounted on the mounting seat (3); a transmission shaft (5) is mounted on the housing (4); a mating gear (6) and a shift fork (7) for pushing the mating gear (6) are mounted on the transmission shaft (5), and the shift fork (7) is fixed on the transmission shaft (5); a brake disc (8) and an electric cylinder (9) are fixedly installed in the housing (4); a limiting hole (10) is formed in the brake disc (8); a stop pin (11) is eccentrically arranged on the mating gear (6) and can be detached into the limiting hole (10); and a telescopic rod of the electric cylinder (9) is connected with the shift fork (7), and the mating gear (6) is engaged with the first planetary carrier gear (2) when the mating gear (6) moves towards the brake disc (8). The mating gear (6) comprises a cam (61), wherein an eccentric portion (62) and a rotating portion (63) are arranged on the cam (61), a half-circle engaging tooth (64) is arranged on a circumferential surface of the rotating portion (63), and the stop pin (11) is fixed on the eccentric portion (62). The shift fork (7) comprises a sliding plate (71) and a bent portion (72) provided on the sliding plate (71), and a limiting cavity is formed by the sliding plate (71) and the bent portion (72), wherein the width of the limiting cavity is greater than the thickness of the cam (61).

2. A chain tightener for an apron conveyor as claimed in claim 1, characterized in that: The sliding plate (71) is fixedly installed on the transmission shaft (5).

3. A chain tightener for an apron conveyor as claimed in claim 2, wherein: The limiting hole (10) is an arc-shaped slot. Two end covers (12) are fixedly installed on the housing (4), and the transmission shaft (5) is slidingly installed on the two end covers (12).

4. A chain tensioning device for an apron conveyor according to any one of claims 1 to 3, characterized in that: A bearing is mounted on the transmission shaft (5), and the mating gear (6) is mounted on the bearing.

5. A chain tightener for an apron conveyor as claimed in claim 4, wherein: A through slot (13) is formed in the mounting seat (3), the mating gear (6) passes through the through slot (13), and the width of the through slot (13) is greater than the length of the stop pin (11).

6. A chain tightener for an apron conveyor as claimed in claim 4, wherein: The shift fork (7) is an integral structure.

7. A chain tightener for an apron conveyor as claimed in claim 4, wherein: ​ 8. A chain tightener for an apron conveyor as claimed in claim 3, characterized in that: ​

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