Pin shaft positioning device of plate chain bucket elevator

Abstract

The utility model discloses a pin shaft positioning device of a plate chain bucket elevator. The pin shaft positioning device comprises a rectangular frame and two positioning parts, the positioning part comprises a fixing ring; the number of the arc-shaped plates is at least two, and the arc-shaped plates are evenly distributed in the circumferential direction of the fixing ring. The arc-shaped plate is a longitudinally arranged flexible body; the upper end of the arc-shaped plate is arranged at the lower end of the fixing ring; the diameter of a cylindrical space defined by the arc-shaped plates is smaller than or equal to the inner diameter of the fixing ring. The lower end of the rectangular frame is provided with two positioning abutting edges abutting against the positions of the corresponding flat wires respectively. The clamp limits the matching position of the pin shaft and the chain plate, the axis of the pin shaft is controlled to be always in a vertical state and the flat filament plane of the pin shaft is controlled to be parallel in the installation process, the positioning purpose is achieved, and meanwhile the positioning precision is improved. The release ring does not contact with the arc-shaped plate, and the pin shaft is convenient to insert; the releasing ring drives the lower end of the arc-shaped plate to move outwards, and the pin shaft is conveniently pulled out.

Description

Technical Field

[0001] The utility model belongs to the technical field of elevators, and in particular relates to a pin shaft positioning device for a plate chain bucket elevator. Background Art

[0002] The chain of the plate chain bucket elevator is the main actuator. The performance of the chain directly determines the performance of the elevator. Plate chain bucket elevators are often customized according to actual working conditions, so the customization requirements of the chain are also relatively high. When assembling the chain, place the pin in the hole of the chain plate to ensure that its relative position with the chain plate is accurate, and then start the hydraulic equipment to gradually embed it into the hole of the chain plate. At present, the installation of single-section chains mainly relies on workers to hold the parts by hand for positioning. This positioning method has poor accuracy and is very likely to cause horizontal and vertical deviation problems in the matching of parts.

[0003] The Chinese patent document with publication number CN108941340A discloses a chain plate pin assembly mechanism, which includes a base and a punching device located above the base, a chain plate placement module is fixedly arranged on the table of the base, and a chain plate pin placement module is fixedly arranged below the punching device; the chain plate placement module is provided with a chain plate placement positioning groove, a chain plate is placed in the chain plate placement positioning groove, a pin hole is provided on the chain plate, and a pin punching insertion hole is provided on the chain plate placement module below the pin hole; the chain plate pin placement module is provided with a chain plate pin fixing hole, a chain plate pin is inserted in the chain plate pin fixing hole, and a positioning pin is provided on the side of the chain plate pin placement module, and the positioning pin passes through the chain plate pin placement module and the chain plate pin.

[0004] The above patent solution positions the pin by setting a positioning tool, but for the pin with flat wire, it is also necessary to adjust the flat wires of the two pins to be opposite and parallel; however, if the pin punching insertion hole is too large, the positioning effect of the pin will be reduced, causing the stamping and crimping failure; if the pin punching insertion hole is too small, the insertion of the pin will be restricted, and the pin will not be easy to rotate when adjusting the position of the flat wire, and it may even get stuck when pulled out. Utility Model Content

[0005] In order to overcome the technical problems in the prior art that the pin shaft insertion hole of the pin shaft positioning tool is too large to achieve the ideal positioning effect, the insertion hole is too small to facilitate the position adjustment of the pin shaft, and even the pin shaft is stuck; one purpose of the utility model is to provide a pin shaft positioning device for a plate chain bucket elevator, by arranging a plurality of flexible bodies distributed along a ring below the insertion hole, the flexible body holds the pin shaft in the insertion hole under its own elastic force to achieve precise positioning, and the pin shaft can overcome the holding force of the flexible body during the process of insertion, withdrawal, and rotation adjustment of the position, which is also convenient for manual operation.

[0006] To achieve the above object, the utility model adopts the following technical solutions: A pin positioning device for a plate chain bucket elevator, comprising a rectangular frame and two positioning parts symmetrically arranged on the rectangular frame; the positioning part includes a fixing ring arranged at the upper part of the rectangular frame; an arc plate, there are at least two arc plates, and they are evenly distributed along the circumferential direction of the fixing ring; wherein, the arc plate is a longitudinally arranged flexible body; the arc plate can be rubber; the upper end of the arc plate is arranged at the lower end of the fixing ring; the diameter of the cylindrical space enclosed by each arc plate is less than or equal to the inner diameter of the fixing ring.

[0007] The chain plate is placed at the upper end of the rectangular frame, and the pin is longitudinally inserted into the fixing ring. The pin located in the cylindrical space is clamped by the elastic force of the arc plate to achieve positioning. The arc plate adopts an intermittent arc structure instead of a whole circle wrapping, which reduces the friction contact area with the pin, can also avoid the jamming situation to a certain extent, and at the same time is convenient for the pin to rotate in the cylindrical space, so that the flat wires on the two pins are aligned and parallel to each other.

[0008] Further, the positioning part includes a release ring longitudinally slidably connected to the rectangular frame and at least one spring arranged between the release ring and the rectangular frame; the axis of the release ring is coaxially arranged with the axis of the fixing ring; an outer expansion conical surface is arranged on the side of the lower end of the arc plate away from the cylindrical space; the outer expansion conical surface abuts against the release ring; the elastic force of the spring is used to move the lower end of the arc plate away from the cylindrical space.

[0009] Further, at least one pressure cap longitudinally slidably connected to the rectangular frame is arranged on the release ring; the pressure cap can optionally extend out from the upper end of the rectangular frame.

[0010] During the process of inserting the pin into the cylindrical space, the lower end of the arc plate expands outward for easy insertion; however, during the process of pulling out the pin upward, the lower end of the arc plate will contract inward under the drive of friction, and the friction will increase, and a certain amount of friction needs to be overcome to pull out.

[0011] During assembly, the placed chain plate presses down the pressure cap, so that the release ring does not contact the arc plate, and the arc plate provides positioning for the pin; after assembly, during the process of pulling out the chain plate and the pin together, the elastic force of the spring drives the release ring to slide upward, driving the lower end of the arc plate to move outward, reducing the normal pressure between the arc plate and the pin, that is, reducing the friction, so as to facilitate the process of pulling out the pin.

[0012] Specifically, there are three arc plates; there are three pressure caps, and they are arranged at intervals with the arc plates; the pressure caps are evenly distributed along the circumferential direction of the fixing ring.

[0013] Furthermore, vertical rods are longitudinally arranged on the outer wall of the release ring; the pressing cap is arranged at the upper end of the vertical rods; the diameter of the pressing cap is larger than that of the vertical rods; the spring is arranged between the pressing cap and the fixed ring and is located outside the periphery of the vertical rods.

[0014] Specifically, a plurality of small through holes respectively and slidably connected to the corresponding vertical rods are arranged on the fixed ring; a plurality of large through holes respectively and slidably connected to the corresponding pressing caps are arranged at the upper end of the rectangular frame; a limiting ring is arranged on the outer wall of the vertical rod below the fixed ring; the diameter of the limiting ring is larger than that of the small through holes.

[0015] The fixed ring is installed at the inner top end of the rectangular frame by welding; the limiting ring is detachably arranged on the outer wall of the vertical rod, facilitating the assembly of the positioning part. When the limiting ring abuts against the lower end of the fixed ring, the pressing cap extends upward to the upper end of the rectangular frame under the elastic force of the spring.

[0016] Preferably, two insertion holes are symmetrically arranged at the upper end of the rectangular frame; the diameter of the insertion holes is equal to the inner diameter of the fixed ring; the insertion holes and the inserted pin shafts adopt a clearance fit, and the unilateral clearance is equal to 0.1 mm.

[0017] Preferably, the rectangular frame and the fixed ring are made of SKD11 steel; the length of the arc-shaped plate is less than that of the pin shaft; the flat wires on the pin shaft are located below the arc-shaped plate; two positioning abutting edges respectively abutting against the positions of the corresponding flat wires are arranged at the lower end of the rectangular frame.

[0018] Considering the service life of the tooling and the safety of the pin shaft and the chain plate, the manufacturing material is selected as SKD11 with a strength greater than that of the chain plate material 40Cr; the lower end of the pin shaft extends out from below the arc-shaped plate, facilitating the observation and adjustment of the position of the pin shaft; when the positioning abutting edges abut against the positions of the flat wires, the two flat wire positions are directly opposite and parallel to each other.

[0019] Furthermore, an annular groove is coaxially arranged at the lower end of the fixed ring; the upper end of the arc-shaped plate is an insertion plate; the thickness of the insertion plate is greater than the width of the annular groove; the insertion plate is inserted into the annular groove in an interference fit manner.

[0020] Furthermore, a central column is longitudinally arranged in the middle of the rectangular frame; both ends of the central column are respectively arranged at the upper end and the lower end of the rectangular frame; side columns are longitudinally arranged near the four sides of the rectangular frame; both ends of the side columns are respectively arranged at the upper end and the lower end of the rectangular frame.

[0021] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0022] 1. This device limits the matching position of the pin and the chain plate, so that the pin axis is always kept in a vertical state and the pin flat wire plane is parallel, so as to achieve pin positioning, reduce the manual participation and workload, and also improve the positioning accuracy.

[0023] 2. When the chain plate is placed on the rectangular frame, the release ring does not contact the arc plate, the pin is easy to insert, and the arc plate holds the pin to achieve positioning; when the chain plate and the pin are removed after crimping, the release ring drives the lower end of the arc plate to move outward under the action of elastic force, reducing the friction between the arc plate and the pin, making it easier to pull the pin out, without adding new operating steps, and is convenient for manual operation.

[0024] 3. The arc plate adopts an elastic flexible body, and the intermittent arc structure covers the pin shaft. While providing a clamping force for the pin shaft to achieve positioning, it is also convenient to rotate the pin shaft to adjust the pin shaft flat wire, so that the two pin shafts remain in a vertical state while the flat wires are facing and parallel, and the surface friction is also reduced, which facilitates the insertion and extraction of the pin shaft, further preventing the occurrence of jamming. At the same time, the structure is simple and compact.

[0025] 4. When the pin is inserted to the bottom, the positioning edge can provide a positioning reference for the flat wire. When the pin is rotated so that the flat wire position is against the positioning edge, it can ensure that the flat wires on the two pins are facing and parallel to each other, thereby improving the positioning accuracy of the pin. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a structural schematic diagram of the utility model;

[0027] Figure 2 It is a schematic diagram of the exploded structure of the parts of the utility model;

[0028] Figure 3 It is a schematic diagram of the exploded structure of the positioning part of the utility model;

[0029] Figure 4 It is a schematic diagram of the state of the pin shaft and the chain plate of the utility model when they are crimped.

[0030] In the figure: 1, hydraulic press; 11, pressure plate; 2, rectangular frame; 21, center column; 22, side column; 23, insertion hole; 24, large diameter hole; 25, positioning edge; 31, chain plate; 32, pin shaft; 321, flat wire; 41, fixing ring; 411, small diameter hole; 412, annular groove; 42, arc plate; 421, outward expansion cone; 422, plug plate; 51, release ring; 52, spring; 53, vertical rod; 531, pressure cap; 532, limit ring. DETAILED DESCRIPTION

[0031] Next, in combination with the accompanying drawings and specific embodiments, the present utility model will be further described. It should be noted that, on the premise of no conflict, the following-described embodiments or technical features can be arbitrarily combined to form new embodiments.

[0032] In the description of the present utility model, it should be noted that for orientation terms, if there are terms such as "center", "horizontal", "vertical", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., the indicated orientation and position relationship are based on the orientation or position relationship shown in the accompanying drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and should not be construed as limiting the specific protection scope of the present utility model.

[0033] In addition, if there are terms such as "first" and "second", they are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present utility model, the meaning of "several" is two or more, unless otherwise clearly and specifically defined.

[0034] In the present utility model, unless otherwise clearly specified and limited, terms such as "set", "installed", etc. should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can also be a mechanical connection; it can be directly connected, or connected through an intermediate medium, and can be internally connected and communicated between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations.

[0035] See Figures 1-4 , a pin positioning device for a plate chain bucket elevator, which includes a hydraulic press 1, a rectangular frame 2 arranged on the upper part of the hydraulic press 1, and two positioning parts symmetrically arranged on the rectangular frame 2; a pressure plate 11 is longitudinally slidably connected above the rectangular frame 2 on the hydraulic press 1.

[0036] The positioning part includes a fixed ring 41 arranged at the inner top of the rectangular frame 2, three arc-shaped plates 42 evenly distributed along the circumferential direction at the lower end of the fixed ring 41, and a release ring 51 longitudinally slidably connected to the fixed ring 41.

[0037] A circular groove 412 is coaxially provided at the lower end of the fixed ring 41; the arc-shaped plate 42 is a longitudinally arranged flexible body; the upper end of the arc-shaped plate 42 is an insertion plate 422; the thickness of the insertion plate 422 is greater than the width of the circular groove 412; the insertion plate 422 is inserted into the circular groove 412 in an interference fit manner; the diameter of the cylindrical space enclosed by each arc-shaped plate 42 is less than or equal to the inner diameter of the fixed ring 41.

[0038] The axis of the release ring 51 is coaxially arranged with the axis of the fixed ring 41; an outwardly expanding conical surface 421 is provided on the side of the lower end of the arc-shaped plate 42 away from the cylindrical space; the outwardly expanding conical surface 421 abuts against the release ring 51.

[0039] Three vertical rods 53 are longitudinally provided on the outer wall of the release ring 51 and are evenly distributed along the circumferential direction; the vertical rods 53 and the arc-shaped plates 42 are arranged at intervals; pressure caps 531 are respectively provided at the upper ends of the vertical rods 53.

[0040] Three small-diameter holes 411 which are respectively slidably connected with the corresponding vertical rods 53 are provided on the fixed ring 41; a plurality of large-diameter holes 24 which are respectively slidably connected with the corresponding pressure caps 531 are provided at the upper end of the rectangular frame 2; a limiting ring 532 is provided on the outer wall of the vertical rod 53 below the fixed ring 41; the diameter of the limiting ring 532 is greater than the diameter of the small-diameter hole 411; the diameter of the pressure cap 531 is greater than the diameter of the vertical rod 53; a spring 52 is provided on the outer periphery of the vertical rod 53 between the fixed ring 41 and the pressure cap 531; the elastic force of the spring 52 is used to move the lower end of the arc-shaped plate 42 towards the side away from the cylindrical space.

[0041] Two insertion holes 23 are symmetrically provided at the upper end of the rectangular frame 2; the diameter of the insertion hole 23 is equal to the inner diameter of the fixed ring 41; the insertion hole 23 and the inserted pin shaft adopt a clearance fit, and the unilateral clearance is equal to 0.1 mm.

[0042] The rectangular frame 2 and the fixed ring 41 are made of SKD11 steel; the length of the arc-shaped plate is less than the length of the pin shaft; the flat wire on the pin shaft is located below the arc-shaped plate; two positioning abutting edges 25 which respectively abut against the corresponding flat wire positions are provided at the lower end of the rectangular frame 2; the flat wire is a notch provided at one end of the pin shaft and is used for connecting with another link plate to prevent the pin shaft from rotating in the hole of the link plate.

[0043] A central column 21 is longitudinally provided in the middle of the rectangular frame 2; both ends of the central column 21 are respectively arranged at the upper end and the lower end of the rectangular frame 2; side columns 22 are longitudinally provided near the four sides of the rectangular frame 2; both ends of the side column 22 are respectively arranged at the upper end and the lower end of the rectangular frame 2.

[0044] Usage process: The operator places the chain plate 31 on the upper end of the rectangular frame 2. Under the action of gravity, the chain plate 31 presses the pressure cap 531, causing the release ring 51 to slide downward into the large-diameter hole 24. The spring 52 compresses and stores energy, and the release ring 51 does not contact the outer expansion conical surface 421. Then, the pin shaft 32 is passed through the chain plate 31 and inserted into the insertion hole 23. The two pin shafts 32 are rotated. Under the action of gravity, the pin shafts 32 slide, and the flat wire position abuts against the positioning abutting edge 25. At this time, the two flat wires 321 are facing each other and parallel to each other. The elastic force of the arc-shaped plate 42 tightly holds the pin shaft 32 to achieve positioning. Subsequently, the hydraulic press 1 is started, and the pressing plate 11 presses the pin shaft 32 onto the chain plate, completing the assembly process of one unit.

[0045] After the crimping is completed, the pressing plate 11 returns to its original position, and the operator removes the chain plate 31. During this process, the chain plate 31 leaves the upper end of the rectangular frame 2. The release ring 51 slides upward under the elastic force of the spring 52. The release ring 51 abuts against the outer expansion conical surface 421 and drives the lower end of the arc-shaped plate 42 to expand outward, reducing the normal pressure between the arc-shaped plate 42 and the pin shaft 32, that is, reducing the friction force, which facilitates the extraction of the pin shaft 32 therefrom.

[0046] The above are only specific embodiments of the present invention, but the technical features of the present invention are not limited thereto. Any changes or modifications made by those skilled in the art within the scope of the present invention are covered by the patent scope of the present invention.

Claims

1. A pin shaft positioning device for a plate chain bucket elevator, characterized in that: It comprises a rectangular frame and two positioning parts symmetrically arranged on the rectangular frame; the positioning part comprises a fixing ring, which is arranged on the upper part of the rectangular frame; there are at least two arc-shaped plates, which are evenly distributed along the circumferential direction of the fixing ring; wherein the arc-shaped plates are flexible bodies arranged longitudinally; the upper end of the arc-shaped plates is arranged at the lower end of the fixing ring; the diameter of the cylindrical space enclosed by each of the arc-shaped plates is less than or equal to the inner diameter of the fixing ring.

2. The positioning device according to claim 1, characterized in that: The positioning portion includes a release ring longitudinally slidably connected to the rectangular frame and at least one spring arranged between the release ring and the rectangular frame; the axis of the release ring is coaxially arranged with the axis of the fixing ring; an outward-expanding conical surface is arranged on the side of the lower end of the arc plate away from the cylindrical space; the outward-expanding conical surface is against the release ring; the elastic force of the spring is used to make the lower end of the arc plate move to the side away from the cylindrical space.

3. The positioning device according to claim 2, characterized in that: The release ring is provided with at least one pressing cap which is longitudinally slidably connected with the rectangular frame; the pressing cap can be selectively extended from the upper end of the rectangular frame.

4. The positioning device according to claim 3, characterized in that: There are three arc-shaped plates; there are three pressure caps, which are arranged at intervals from the arc-shaped plates; and the pressure caps are evenly distributed along the circumferential direction of the fixing ring.

5. The positioning device according to claim 3, characterized in that: A vertical rod is longitudinally arranged on the outer wall of the release ring; the pressure cap is arranged at the upper end of the vertical rod; the diameter of the pressure cap is larger than the diameter of the vertical rod; the spring is arranged between the pressure cap and the fixing ring and is located at the outer periphery of the vertical rod.

6. The positioning device according to claim 5, characterized in that: The fixing ring is provided with a plurality of small holes which are respectively slidably connected with the corresponding vertical rods; the upper end of the rectangular frame is provided with a plurality of large holes which are respectively slidably connected with the corresponding pressure caps; a limiting ring is provided on the outer wall of the vertical rod below the fixing ring; the diameter of the limiting ring is larger than the diameter of the small holes.

7. The positioning device according to any one of claims 1 to 6, characterized in that: Two insertion holes are symmetrically arranged at the upper end of the rectangular frame; the diameter of the insertion hole is equal to the inner diameter of the fixing ring; the insertion hole and the inserted pin shaft adopt clearance fit, and the single-side clearance is equal to 0.1mm.

8. The positioning device according to any one of claims 1 to 6, characterized in that: The rectangular frame and the fixing ring are made of SKD11 steel; the length of the arc plate is less than that of the pin shaft; the flat wire on the pin shaft is located below the arc plate; and the lower end of the rectangular frame is provided with two positioning edges respectively abutting against the corresponding flat wire positions.

9. The positioning device according to any one of claims 1 to 6, characterized in that: The lower end of the fixing ring is coaxially provided with an annular groove; the upper end of the arc-shaped plate is an insert plate; the insert plate is inserted into the annular groove in an interference fit manner.

10. The positioning device according to any one of claims 1 to 6, characterized in that: A central column is longitudinally arranged in the middle of the rectangular frame; two ends of the central column are respectively arranged at the upper end and the lower end of the rectangular frame; side columns are longitudinally arranged near the four sides of the rectangular frame; two ends of the side columns are respectively arranged at the upper end and the lower end of the rectangular frame.

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