Special drawing device for hollow shaft speed reducer

Abstract

The utility model provides a drawing device special for a hollow shaft speed reducer. The drawing device comprises a drawing disc assembly, a drawing frame and a threaded ejector rod. The pull disc assembly comprises two pull discs and two connecting rods which are symmetrically arranged; the middle of each pull disc is provided with an outwards-protruding arc-shaped boss, the center lines of the arc-shaped bosses of the two pull discs which are symmetrically arranged coincide, and the two ends of the two connecting rods are connected with the two ends of the two pull discs respectively. The drawing frame comprises a supporting beam and two pull rods; a screw hole is formed in the middle of the supporting beam, and the center line of the screw hole coincides with the center lines of the arc-shaped bosses of the two pull discs. One ends of the two pull rods are connected with the two connecting rods respectively, and the other ends of the two pull rods are connected to the two ends of the supporting beam respectively; the threaded ejector rod is arranged in the screw hole in a penetrating mode and is in threaded connection with the screw hole. According to the puller, the box body of the speed reducer and parts in the box body cannot be damaged in the pulling process, the risk that people and objects are hurt due to falling does not exist, operation is safer, and the puller is suitable for disassembling speed reducers with box bodies of various different shapes.

Description

Technical Field

[0001] The present application relates to the technical field related to reducers, and in particular to a puller specifically for hollow shaft reducers. Background Art

[0002] Hollow shaft reducers offer advantages such as high transmission efficiency, strong load-bearing capacity, and easy installation and maintenance. They have broad application prospects in industries such as metallurgy, chemical engineering, mining, and cement. Hollow shaft reducers are mounted on the protruding main shaft of the equipment through a hollow sleeve. The rotation of the hollow sleeve transmits the force to the main shaft of the equipment.

[0003] When disassembling the reducer, it is necessary to overcome the reducer's own gravity and the friction between the hollow shaft sleeve and the equipment main shaft. It is necessary to use tools to generate a large force to remove the hollow shaft reducer and the hollow shaft sleeve from the end of the equipment main shaft in parallel. Currently, the main methods used to disassemble the hollow shaft reducer include the following two methods:

[0004] The first type, disassembly of thin jack:

[0005] See also Figure 5 As shown, the thin jack 70 is disassembled by symmetrically placing the thin jack 70 between the equipment and the reducer, and the reducer is pushed out from the main shaft 50 of the equipment by applying pressure through the jack 70.

[0006] Second, ordinary puller disassembly method:

[0007] See also Figure 6 As shown, a puller 80 is used to hook the reducer housing through a hook 81 , and after the screw rod is pressed against the device main shaft 50 , the screw rod is rotated to pull the reducer out of the device main shaft 50 .

[0008] The above method may have the following problems:

[0009] (1) The application range is narrow. Generally, it is only applicable to reducers with symmetrical and flat housings. However, due to the layout restrictions of the internal transmission mechanism, the housings of reducers currently on the market are often irregular and asymmetrical.

[0010] (2) The operation is complicated and special pads need to be made according to the site conditions. Improper operation can easily cause pads and tools to fall and injure people or objects;

[0011] (3) When disassembling the reducer, the force generated by the tool acts on the reducer housing. When the force is asymmetric, there is a risk of damaging the reducer housing and the equipment spindle.

[0012] (4) When disassembling the reducer, the force generated by the tool acts on the reducer housing, which may damage the internal parts of the reducer housing. Utility Model Content

[0013] The embodiment of the present application provides a puller specifically for a hollow shaft reducer, comprising a pulling disc assembly, a pulling frame, and a threaded ejector rod;

[0014] The pull tray assembly includes two symmetrically arranged pull trays and two connecting rods; the middle portion of the pull tray has an outwardly convex arc-shaped boss, the center lines of the arc-shaped bosses of the two symmetrically arranged pull trays coincide, and the two ends of the two connecting rods are respectively connected to the two ends of the two pull trays;

[0015] The pulling frame includes a supporting beam and two pulling rods; a screw hole is provided in the middle of the supporting beam, and the center line of the screw hole coincides with the center line of the arc-shaped bosses of the two pulling plates; one end of the two pulling rods is connected to the two connecting rods respectively, and the other ends of the two pulling rods are connected to the two ends of the supporting beam respectively;

[0016] The threaded push rod is inserted into the screw hole and is threadedly connected to the screw hole.

[0017] In one possible embodiment, the hollow shaft reducer puller provided in the embodiment of the present application comprises a pulling disc including an arc-shaped portion and two connecting portions symmetrically arranged at opposite ends of the arc-shaped portion;

[0018] The arc-shaped boss is arranged on the arc-shaped portion, and a positioning hole is provided on the connecting portion. The opening direction of the positioning hole is perpendicular to the outward protrusion direction of the arc-shaped boss, and the two connecting rods are respectively connected to the positioning holes of the two connecting portions.

[0019] In one possible implementation manner, in the puller specifically for the hollow shaft reducer provided in the embodiment of the present application, the positioning hole is a long waist hole.

[0020] In one possible embodiment, the hollow shaft reducer puller provided in the embodiment of the present application has a threaded outer wall surface of the connecting rod, and a vertical fastening nut is provided on each opposite side of each connecting portion, and the vertical fastening nut cooperates with the thread connected to the outer wall surface of the connecting rod, and the connecting portion is clamped between the two vertical fastening nuts.

[0021] In one possible implementation manner, in the hollow shaft reducer puller provided in the embodiment of the present application, adjustment holes are respectively provided at opposite ends of the support beam, and the pull rod is connected in the adjustment holes.

[0022] In one possible implementation manner, in the puller specifically for the hollow shaft reducer provided in the embodiment of the present application, the adjustment hole is a long waist hole.

[0023] In one possible embodiment, the hollow shaft reducer puller provided in the embodiment of the present application has a threaded outer wall of the pull rod, two horizontal fastening nuts are sleeved on the pull rod, and the horizontal fastening nuts are connected with the threads on the outer wall of the pull rod, and the support beam is clamped between the two horizontal fastening nuts.

[0024] In one possible implementation manner, in the hollow shaft reducer puller provided in the embodiment of the present application, a washer is provided between the horizontal fastening nut and the support beam.

[0025] In one possible implementation manner, the hollow shaft reducer puller provided in the embodiment of the present application has a pull rod head at one end thereof, a through hole being provided on the pull rod head, and the connecting rod is passed through the through hole.

[0026] In one possible implementation manner, in the hollow shaft reducer puller provided in an embodiment of the present application, a cone head is provided at one end of the threaded push rod close to the pulling disc assembly.

[0027] Beneficial effects of this application:

[0028] 1. The existence of the arc-shaped boss on the pulling plate will press against the end face of the hollow sleeve during pulling. Only the hollow sleeve of the reducer is under stress, and the reducer housing and internal components of the housing will not be damaged during the pulling process.

[0029] 2. The puller's pulling discs are symmetrically placed to clamp the main shaft of the equipment. There is no risk of falling and injuring people or objects during the pulling process, making the operation safer.

[0030] 3. The puller uses a pull disc instead of a hook, which can be used to disassemble reducers with various shapes of boxes;

[0031] 4. The pull plate and pull rod positions of the puller can be adjusted, which allows for flexible disassembly of reducers of different sizes. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, a brief introduction will be given below to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0033] Figure 1 This is a structural diagram of a puller specifically designed for a hollow shaft reducer provided in an embodiment of the present application;

[0034] Figure 2This is a schematic diagram of the explosion of the hollow shaft reducer puller provided in the embodiment of the present application. Figure 1 ;

[0035] Figure 3 This is a schematic diagram of the explosion of the hollow shaft reducer puller provided in the embodiment of the present application. Figure 2 ;

[0036] Figure 4 This is a schematic diagram of the installation of a puller specifically for a hollow shaft reducer provided in an embodiment of the present application;

[0037] Figure 5 It is a schematic diagram of prior art one;

[0038] Figure 6 It is a schematic diagram of the prior art 2.

[0039] 10-pull plate assembly;

[0040] 11-Pull the plate;

[0041] 111- arc-shaped boss;

[0042] 112- positioning hole;

[0043] 12-connecting rod;

[0044] 13-vertical fastening nut;

[0045] 20-Pull-out rack;

[0046] 21- supporting beam;

[0047] 211-adjustment hole;

[0048] 22-pull rod;

[0049] 221-tie rod head;

[0050] 23-horizontal fastening nut;

[0051] 30-threaded ejector rod;

[0052] 31-cone head;

[0053] 40-reducer;

[0054] 41-Hollow sleeve

[0055] 50- Equipment spindle;

[0056] 60-pad;

[0057] 70-Jack;

[0058] 80-Puller;

[0059] 81-Hook. DETAILED DESCRIPTION

[0060] In order to make the purpose, technical solutions and advantages of the present application clearer, the technical solutions in the embodiments of the present application will be described in more detail below in conjunction with the drawings in the preferred embodiments of the present application. In the drawings, the same or similar reference numerals throughout represent the same or similar parts or parts with the same or similar functions. The described embodiments are part of the embodiments of the present application, not all of the embodiments. The embodiments described below with reference to the drawings are exemplary and are intended to be used to explain the present application, and should not be understood as limitations on the present application. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.

[0061] Figure 1 This is a structural diagram of a puller specifically designed for a hollow shaft reducer provided in an embodiment of the present application; Figure 2 This is a schematic diagram of the explosion of the hollow shaft reducer puller provided in the embodiment of the present application. Figure 1 ; Figure 3 This is a schematic diagram of the explosion of the hollow shaft reducer puller provided in the embodiment of the present application. Figure 2 ; Figure 4 This is a schematic diagram of the installation of a puller specifically designed for a hollow shaft reducer according to an embodiment of the present application.

[0062] See also Figures 1 to 4 As shown, the present application provides a puller specifically for a hollow shaft reducer 40, comprising a pulling disc assembly 10, a pulling frame 20 and a threaded ejector rod 30, wherein:

[0063] The pull tray assembly 10 includes two symmetrically arranged pull trays 11 and two connecting rods 12. The middle part of the pull tray 11 has an outwardly protruding arc-shaped boss 111. The center lines of the arc-shaped bosses 111 of the two symmetrically arranged pull trays 11 coincide with each other. The two ends of the two connecting rods 12 are respectively connected to the two ends of the two pull trays 11.

[0064] The drawing frame 20 includes a support beam 21 and two pull rods 22. A screw hole is provided in the middle of the support beam 21, the centerline of which coincides with the centerline of the arc-shaped bosses 111 of the two pulling plates 11. One end of each pull rod 22 is connected to the two connecting rods 12, and the other end of each pull rod 22 is connected to the two ends of the support beam 21.

[0065] The threaded push rod 30 is passed through the screw hole and is threadedly connected to the screw hole.

[0066] When in use, place the two pull plates 11 on both sides of the equipment main shaft 50, adjust the position of the pull plates 11 until the arc-shaped boss 111 rests on the end face of the hollow shaft sleeve of the reducer 40; connect the two connecting rods 12 (with the pull rod 22 connected) to the two ends of the two pull plates 11 respectively to fix the relative position between the two pull plates 11; connect the two pull rods 22 to the support beam 21 (with the threaded push rod 30 installed in the screw hole), and rotate the threaded push rod 30 until its head rests on the end face of the equipment main shaft 50; further rotate the threaded push rod 30 so that the equipment main shaft 50 and the hollow shaft sleeve are subjected to forces in opposite directions, thereby pulling the hollow shaft sleeve outward, and finally removing the reducer 40 from the equipment main shaft 50.

[0067] During this process, the presence of the curved boss 111 on the puller disc 11 presses against the end face of the hollow sleeve during pulling. Only the hollow sleeve of the reducer 40 is subjected to force, preventing damage to the reducer 40 housing and its internal components. The puller's two symmetrically positioned pullers 11 clamp the device's main shaft 50, eliminating the risk of injury from falling and causing damage to personnel and property during the pulling process, making operation safer. The puller utilizes pullers 11, rather than hooks, making it suitable for disassembling reducers 40 from various housing shapes.

[0068] Specifically, the pull tray 11 comprises an arcuate portion and two connecting portions symmetrically disposed at opposite ends of the arcuate portion. An arcuate boss 111 is disposed on the arcuate portion. The connecting portions have a positioning hole 112, which is perpendicular to the outward projection of the arcuate boss 111 and is a long, waist-shaped hole.

[0069] The connecting rod 12 is inserted into the positioning hole 112. The outer wall of the connecting rod 12 is provided with a thread. A vertical fastening nut 13 is provided on each opposite side of each connecting part. The vertical fastening nut 13 cooperates with the thread on the outer wall of the connecting rod 12, and the connecting part is clamped between the two vertical fastening nuts 13.

[0070] The supporting beam 21 has adjustment holes 211 at opposite ends. The adjustment holes 211 are elongated, and one end of the tie rod 22 has a tie rod head 22. The tie rod head 22 has a through hole, and the connecting rod 12 is inserted into the through hole. The tie rod 22 is inserted into the adjustment hole 211. The outer wall of the tie rod 22 is threaded. Two horizontal fastening nuts 23 are sleeved on the tie rod 22. The horizontal fastening nuts 23 are engaged with the threads on the outer wall of the tie rod 22. The supporting beam 21 is clamped between the two horizontal fastening nuts 23. A washer is provided between the horizontal fastening nuts 23 and the supporting beam 21 to increase the force-bearing area.

[0071] Through the above structure, the positions of the pull plate 11 and the pull rod 22 can be adjusted, and the disassembly of reducers 40 of more different sizes can be flexibly compatible.

[0072] An end of the threaded push rod 30 close to the pull plate assembly 10 is provided with a cone head 31 so that the threaded push rod 30 has less resistance when rotating.

[0073] In the description of the embodiments of the present application, it should be understood that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense. For example, it can be a fixed connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to the specific circumstances. The orientation or position relationship indicated by the terms "upper", "lower", "front", "back", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc. is based on the orientation or position relationship shown in the accompanying drawings. It is only for the convenience of describing this application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this application. In the description of this application, the meaning of "multiple" is two or more, unless otherwise precisely and specifically specified.

[0074] The terms "first," "second," "third," "fourth," and the like in the specification and claims of this application and the accompanying drawings are used to distinguish similar objects and are not necessarily used to describe a specific order or sequential sequence. It should be understood that the numbers used in this manner are interchangeable where appropriate, so that the embodiments of the application described herein can be implemented in a sequence other than those illustrated or described herein. In addition, the terms "including" and "having," as well as any variations thereof, are intended to cover non-exclusive inclusions, for example, a process, method, system, product, or apparatus comprising a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or that are inherent to these processes, methods, products, or apparatus.

[0075] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some or all of the technical features therein. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A puller for hollow shaft reducer, characterized in that: It includes a pulling plate assembly, a pulling frame and a threaded ejector rod; The pull tray assembly includes two symmetrically arranged pull trays and two connecting rods; the middle portion of the pull tray has an outwardly convex arc-shaped boss, the center lines of the arc-shaped bosses of the two symmetrically arranged pull trays coincide, and the two ends of the two connecting rods are respectively connected to the two ends of the two pull trays; The pulling frame includes a supporting beam and two pulling rods; a screw hole is provided in the middle of the supporting beam, and the center line of the screw hole coincides with the center line of the arc-shaped bosses of the two pulling plates; one end of the two pulling rods is connected to the two connecting rods respectively, and the other ends of the two pulling rods are connected to the two ends of the supporting beam respectively; The threaded push rod is inserted into the screw hole and is threadedly connected to the screw hole.

2. The hollow shaft reducer puller according to claim 1, characterized in that: The pull plate includes an arc-shaped portion and two connecting portions symmetrically arranged at opposite ends of the arc-shaped portion; The arc-shaped boss is arranged on the arc-shaped portion, and a positioning hole is provided on the connecting portion. The opening direction of the positioning hole is perpendicular to the outward protrusion direction of the arc-shaped boss, and the two connecting rods are respectively connected to the positioning holes of the two connecting portions.

3. The hollow shaft reducer puller according to claim 2, characterized in that: The positioning hole is a long waist hole.

4. The hollow shaft reducer puller according to claim 3, characterized in that: The outer wall surface of the connecting rod is provided with a thread, and a vertical fastening nut is provided on the opposite sides of each connecting part. The vertical fastening nut cooperates with the thread connected to the outer wall surface of the connecting rod, and the connecting part is clamped between the two vertical fastening nuts.

5. The hollow shaft reducer puller according to claim 1, characterized in that: Adjustment holes are respectively provided at opposite ends of the support beam, and the pull rod is connected in the adjustment holes.

6. The puller for hollow shaft reducer according to claim 5, characterized in that: The adjusting hole is a long waist hole.

7. The puller for hollow shaft reducer according to claim 6, characterized in that: The outer wall surface of the pull rod is provided with threads, and two horizontal fastening nuts are sleeved on the pull rod. The horizontal fastening nuts are matched with the threads on the outer wall surface of the pull rod, and the support beam is clamped between the two horizontal fastening nuts.

8. The puller for hollow shaft reducer according to claim 7, characterized in that: A washer is provided between the horizontal fastening nut and the support beam.

9. The puller for hollow shaft reducer according to any one of claims 1 to 8, characterized in that: A pull rod head is provided at one end of the pull rod, a through hole is provided on the pull rod head, and the connecting rod is passed through the through hole.

10. The puller for hollow shaft reducer according to any one of claims 1 to 8, characterized in that: One end of the threaded push rod close to the pulling plate assembly is provided with a cone head.

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