Split type roll shaft mounting structure and printer

Abstract

The utility model relates to the technical field of roll shafts, in particular to a split type roll shaft installation structure and a printer, which comprises a synchronous pulley, a transmission shaft, a roll shaft, a first bearing structure, a second bearing structure and a third bearing structure, the synchronous pulley is arranged between the first bearing structure and the second bearing structure and detachably connected with the transmission shaft, the first bearing structure and the synchronous pulley are arranged in the closed space, a first connecting part is arranged at the end of the side, away from the first bearing structure, of the transmission shaft, and a second connecting part is arranged at the end of the side, close to the first connecting part, of the roller shaft. The first connecting part and the second connecting part are rotationally connected, the concentricity of the transmission shaft and the roll shaft is the same, and the end of the roll shaft is connected with a bearing of the third bearing structure. The utility model further provides a printer. According to the utility model, the transmission shaft is respectively and detachably connected with the synchronous pulley and the roll shaft, so that the roll shaft can be quickly replaced without dismounting the synchronous pulley, and the maintenance cost and time are saved.

Description

Technical Field

[0001] The utility model relates to the technical field of roller shafts, in particular to a split roller shaft installation structure and a printer. Background Art

[0002] Thermal transfer printers use special carbon ribbons, which work similarly to the print head of a fax machine. The toner coating on the carbon ribbon is heated and transferred to paper or other types of materials. The carbon ribbon and paper pass between the print head and the roller. One end of the roller is connected to a synchronous pulley, and the motor drives the roller to rotate through the synchronous pulley transmission mechanism. The print head presses the carbon ribbon and paper onto the roller, and the rotation of the roller drives the paper forward through friction.

[0003] At present, since the outer ring layer of the roller is made of silicone rubber material, after long-term printing by the printer, due to various reasons such as long-term heat transfer from the print head, long-term friction between the roller surface and the paper, and aging of the silicone rubber material over time, the roller surface will be worn and the outer diameter will become smaller, or local detachment will occur to form pits and other undesirable phenomena, thereby affecting the printing effect of the printer. Since screws are used to fix the synchronous pulley to the roller or other similar fixed structures, and the synchronous pulley transmission structure is placed in the sealed space inside the machine. When the roller needs to be replaced, the side cover of the printer needs to be opened and the synchronous pulley removed before the roller can be removed. This operation requires professionals to perform, which greatly increases the maintenance time and cost of the machine.

[0004] Therefore, there is an urgent need for a split roller installation structure and a printer, which can quickly replace the roller without removing the synchronous pulley. Utility Model Content

[0005] In view of this, the technical problem to be solved by the utility model is to provide a split roller shaft installation structure to solve the problem of quickly replacing the roller shaft without removing the synchronous pulley.

[0006] The technical solution adopted by the utility model to solve the above technical problems is as follows:

[0007] According to one aspect of the utility model, a split roller shaft structure is provided, wherein the split roller shaft installation structure comprises a synchronous pulley, a transmission shaft, a roller shaft, a first bearing structure, a second bearing structure and a third bearing structure, wherein the bearings of the first bearing structure and the second bearing structure are arranged on both sides of the transmission shaft and are respectively connected to the transmission shaft, the synchronous pulley is arranged between the bearings of the first bearing structure and the bearings of the second bearing structure and are detachably connected to the transmission shaft, the first bearing structure and the synchronous pulley are arranged in a confined space, a first connecting portion is provided at an end of the transmission shaft away from the bearing of the first bearing structure, a second connecting portion is provided at an end of the roller shaft close to the first connecting portion, the first connecting portion and the second connecting portion are rotationally connected and make the transmission shaft and the roller shaft have the same concentricity, and the end of the roller shaft away from the second connecting portion is connected to the bearing of the third bearing structure.

[0008] Preferably, the synchronous pulley and the transmission shaft are connected by screws, keys, splines, tension sleeves or pins.

[0009] Preferably, the first connecting portion has a square or triangular hole, and the second connecting portion has a square or triangular protrusion corresponding to the square or triangular hole.

[0010] Preferably, a positioning groove is provided at the end of the first connecting part, and a positioning hole is provided at the bottom of the positioning groove. The second connecting part includes a flat position and a positioning column. The two ends of the flat position are respectively connected to the end of the roller shaft and the positioning column. When the first connecting part and the second connecting part are connected, the flat position is accommodated in the positioning groove, and the positioning column is accommodated in the positioning hole.

[0011] Preferably, the positioning groove is fork-shaped.

[0012] Preferably, the end of the first connecting portion passes through the enclosed space and is flush with the side end surface of the enclosed space.

[0013] Preferably, the positioning groove passes through the enclosed space and is arranged outside the enclosed space.

[0014] Preferably, the first bearing structure includes a transmission shaft bracket, a first bearing and a retaining spring, the first bearing is arranged on the bracket through hole of the transmission shaft bracket, and the retaining spring is clamped with the first bearing, the second bearing structure includes a second bearing, and the second bearing is arranged on the side end surface of the enclosed space, and the third bearing structure includes a bearing bracket and a third bearing, and the third bearing is arranged on the bearing bracket.

[0015] The utility model also provides a printer, which includes a synchronous pulley, a transmission shaft, a roller shaft, a first bearing structure, a second bearing structure and a third bearing structure, wherein the bearings of the first bearing structure and the second bearing structure are arranged on both sides of the transmission shaft and are respectively connected to the transmission shaft, the synchronous pulley is arranged between the bearings of the first bearing structure and the bearings of the second bearing structure and are detachably connected to the transmission shaft, the first bearing structure and the synchronous pulley are arranged in a confined space, the end of the transmission shaft away from the bearing of the first bearing structure is provided with a first connecting part, the end of the roller shaft close to the first connecting part is provided with a second connecting part, the first connecting part and the second connecting part are rotatably connected and make the concentricity of the transmission shaft and the roller shaft the same, and the end of the roller shaft away from the second connecting part is connected to the bearing of the third bearing structure.

[0016] Preferably, the bearing bracket is detachably arranged on the side panel of the printer, and the bearing bracket is provided with a positioning boss, and the side panel is provided with a third bearing through hole at a position corresponding to the positioning boss, and the positioning boss cooperates with the third bearing through hole for positioning connection.

[0017] Compared with the prior art, the split roller shaft installation structure provided by the utility model is detachably connected to the synchronous pulley and the roller shaft through the transmission shaft. The roller shaft can be pulled out laterally by removing the bearing of the third bearing structure without removing the synchronous pulley, thereby realizing rapid replacement of the roller shaft and saving maintenance cost and time. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 The present invention is a schematic structural diagram of a transmission shaft in a split roller shaft installation structure provided in one embodiment of the present invention.

[0019] Figure 2 The present invention is a schematic structural diagram of a screw connection between a transmission shaft and a synchronous pulley in a split roller shaft installation structure provided in one embodiment of the present invention.

[0020] Figure 3 The present invention is a schematic structural diagram of a roller in a split roller installation structure provided in one embodiment of the present invention.

[0021] Figure 4 The present invention is a schematic structural diagram of a rotational connection between a transmission shaft and a roller shaft in a split roller shaft installation structure provided in one embodiment of the present invention.

[0022] Figure 5 A partial structural schematic diagram of a printer with a split roller installation structure provided in one embodiment of the utility model.

[0023] Figure 6This is a schematic diagram of another part of the structure of a printer with a split roller installation structure provided by one embodiment of the utility model.

[0024] Figure 7 A schematic diagram of a portion of a printer with a split roller mounting structure installed provided by an embodiment of the utility model. DETAILED DESCRIPTION

[0025] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention clearer and more understandable, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0026] like Figures 1 to 7 As shown, Figure 1 The present invention is a schematic structural diagram of a transmission shaft in a split roller shaft installation structure provided in one embodiment of the present invention. Figure 2 The present invention is a schematic structural diagram of a screw connection between a transmission shaft and a synchronous pulley in a split roller shaft installation structure provided in one embodiment of the present invention. Figure 3 The present invention is a schematic structural diagram of a roller in a split roller installation structure provided in one embodiment of the present invention. Figure 4 The present invention is a schematic structural diagram of a rotational connection between a transmission shaft and a roller shaft in a split roller shaft installation structure provided in one embodiment of the present invention. Figure 5 A partial structural schematic diagram of a printer with a split roller installation structure provided in one embodiment of the utility model. Figure 6 This is a schematic diagram of another part of the structure of a printer with a split roller installation structure provided by one embodiment of the utility model. Figure 7 A schematic diagram of a portion of a printer with a split roller mounting structure installed provided by an embodiment of the utility model.

[0027] The split roller installation structure includes a synchronous pulley 201, a transmission shaft 100, a roller 300, a first bearing structure, a second bearing structure and a third bearing structure. The bearing 410 of the first bearing structure and the bearing 510 of the second bearing structure are arranged on both sides of the transmission shaft 100 and are respectively connected to the transmission shaft 100. The synchronous pulley 201 is arranged between the bearing 410 of the first bearing structure and the bearing 510 of the second bearing structure and is detachably connected to the transmission shaft 100. The first bearing structure and the synchronous pulley 201 are arranged in a confined space 20. The end of the transmission shaft 100 away from the bearing 410 of the first bearing structure is provided with a first connecting portion 110, and the end of the roller 300 close to the first connecting portion 110 is provided with a second connecting portion. The first connecting portion 110 and the second connecting portion are rotationally connected to each other and make the concentricity of the transmission shaft 100 and the roller 300 the same. The end 320 of the roller 300 away from the second connecting portion is connected to the bearing 610 of the third bearing structure.

[0028] In some embodiments, the transmission shaft 100 is roughly stick-shaped, the left side of the transmission shaft is the first bearing structure connection section 101, and the right side of the transmission shaft is the second bearing structure connection section 102. The synchronous pulley fixed section is located between the first bearing structure connection section 101 and the second bearing structure connection section 102 and is respectively connected to the first bearing structure connection section 101 and the second bearing structure connection section 102. The synchronous pulley fixed section is provided with a first screw hole 103. The synchronous pulley 201 has a pulley body and a locking portion protruding along the side of one side of the pulley body. Since the middle of the synchronous pulley 201 and the locking portion has a through hole, the synchronous pulley 201 can be passed through the first bearing structure connection section 101 to the synchronous pulley fixed section through the above-mentioned through hole. Then the through hole or the second screw hole on the locking portion is aligned with the first screw hole 103, and finally the locking portion and the synchronous pulley fixed section are fixedly connected together with a screw 202. In this way, the synchronous pulley 201 can only rotate and drive the synchronous pulley fixed section to rotate through the locking portion. The end of the second bearing structure connecting section 102 away from the first bearing structure connecting section 101 is connected to the first connecting section 110. A positioning groove is provided at the end of the first connecting section 110, and a positioning hole 104 is provided at the bottom end of the positioning groove. In this embodiment, the positioning groove is composed of two symmetrically protruding protrusions 105, the outer side surface of the protrusion 105 is an arc surface and the inner side surface is a vertical surface. It is equivalent to the original first connecting section 110 being cylindrical, and the end surface of the first connecting section 110 is vertically cut along the parallel lines set at intervals and cut horizontally at the lowest point, and the part between the two parallel lines is taken away to form the above-mentioned protrusion 105. A positioning hole 104 is opened at the bottom end of the positioning groove between the two protrusions 105. In this embodiment, the transmission shaft 100 is processed in one piece. Therefore, the synchronous pulley 201 drives the synchronous pulley fixed section to rotate through the locking part, the left side of the synchronous pulley fixed section drives the first bearing structure connecting section 101 to rotate, the right side of the synchronous pulley fixed section drives the second bearing structure connecting section 102 to rotate, and the second bearing structure connecting section 102 drives the first connecting part 110 to rotate.

[0029] Look again Figure 3 and Figure 4The middle part of the roller 300 is the roller body 310, which is the part that contacts the paper under pressure and is wrapped with a layer of silicone rubber material. The roller body 310 is provided with a second connection part at one end close to the transmission shaft 100. In this embodiment, the second connection part includes a flat part 330 and a positioning column 340. The two ends of the flat part 330 are respectively connected to the end of the roller 300 and the positioning column 340, that is, the flat part 330 protrudes along the end of the roller body 310, and the positioning column 340 protrudes along the end of the flat part 330. When the first connection part 110 and the second connection part are connected, the flat part 330 is accommodated in the positioning groove formed by the two convex parts 105 arranged at intervals, and the positioning column 340 extends into the positioning hole 104. In this embodiment, when the positioning column 340 extends into the positioning hole 104, the concentricity of the roller shaft 300 and the transmission shaft 100 is ensured. When the flat part 330 extends into the positioning groove, the flat part 330 and the positioning groove are connected so that the transmission shaft 100 can drive the roller shaft 300 to rotate.

[0030] In the present embodiment, the first bearing structure includes a transmission shaft bracket 420, a bearing 410 of the first bearing structure, and a retaining spring 440. The transmission shaft bracket 420 is similar to an "n" shape, and the transmission shaft bracket 420 is fixed on the side plate 30 to form an enclosed space, and the enclosed space is in the closed space 20. A first bearing through hole 421 is provided on the bottom end surface of the transmission shaft bracket 420, and the bearing 410 of the first bearing structure is arranged on the first bearing through hole 421, and the first bearing structure connecting section 101 of the transmission shaft 100 is connected to the bearing 410 of the first bearing structure. A second bearing through hole 31 is provided on the side plate 30, and the bearing 420 of the second bearing structure is connected to the second bearing structure connecting section 102. In the present embodiment, the concentricity of the bearing 410 of the first bearing structure and the bearing 420 of the second bearing structure after installation is consistent. As can be seen from the figure, the transmission shaft bracket 420, the synchronous pulley 201, the bearing 410 of the first bearing structure, and the first bearing structure connecting section 101 and the second bearing structure connecting section 102 of the transmission shaft 100 are in the enclosed space 20, and the retaining spring 440 is engaged with the bearing 410 of the first bearing structure. The first connecting portion 110 is outside the enclosed space 20. The printer 1 is provided with a receiving portion for the roller 300 in the direction in which the length of the first connecting portion 110 extends. The roller can pass through the third bearing through hole 11 and the receiving portion of the roller 300 along the direction in which the length extends, and the second connecting portion is connected to the first connecting portion 110. The third bearing structure includes a bearing bracket 620 and a third bearing 610. In this embodiment, a positioning boss is provided on one side end face of the bearing bracket 620 corresponding to the third bearing through hole 11, and the position of the side plate 20 corresponding to the positioning boss is the third bearing through hole 11. The positioning boss cooperates with the third bearing through hole 11 for positioning connection, so that the concentricity of the bearing 410 of the first bearing structure, the bearing 420 of the second bearing structure and the third bearing 610 after installation is consistent. In some other embodiments, a positioning pin is provided on one end surface of the bearing bracket 620 corresponding to the third bearing through hole 11, and the positioning pin can be inserted into the frame 10 of the printer 1 for positioning and adjusting the concentricity.

[0031] In some embodiments, the connection between the synchronous pulley 201 and the transmission shaft 100 can be any one of a screw connection, a key connection, a spline connection, a tension sleeve connection or a pin connection.

[0032] In some embodiments, the end of the first connection portion 110 has a triangular or square hole. The second connection portion has a square or triangular convex portion corresponding to the square or triangular hole. By setting the positions of the triangular or square hole and the square or triangular convex portion, when the square or triangular convex portion is inserted into the triangular or square hole and the transmission shaft 100 and the roller shaft 300 are rollingly connected, the concentricity of the transmission shaft 100 and the roller shaft 300 is the same.

[0033] In some embodiments, the positioning groove is fork-shaped.

[0034] In some embodiments, the end of the first connection portion 110 passes through the enclosed space 20 and is flush with the side plate 30 of the enclosed space 20. Specifically, the bearing 510 of the second bearing structure is first installed in the second bearing through hole 31 of the side plate 30 of the printer 1, and the outer end surface of the bearing 510 of the second bearing structure is flush with the side plate 30, the transmission shaft 100 is installed from the inside of the enclosed space 20 to the outside, the first connection portion 110 of the transmission shaft 100 is flush with the side plate 30, and then the synchronous pulley 201 is screwed to the first screw hole 103 of the transmission shaft 100, and finally the transmission shaft 100 is fixed by the transmission shaft bracket 420. Since the first connection portion 110 of the transmission shaft 100 is flush with the side plate 30, the corresponding roller 300 and the end 320 of the second connection portion of the transmission shaft 100 need to be extended before they can be connected to the transmission shaft 100.

[0035] Finally, the specific process of replacing the roller 300 is described:

[0036] 1. Remove the bearing bracket 620 from the frame 10 (usually connected by screws);

[0037] 2. Disconnect the third bearing 610 from the roller shaft 300 along the length extension direction of the roller shaft 300;

[0038] 3. Pull the roller shaft 300 out of the third bearing through hole 11 along the direction in which the length of the roller shaft 300 extends.

[0039] The utility model sets a separate rotation connection between the transmission shaft 100 and the roller 300, and places the transmission shaft bracket 420, the synchronous pulley 201, the bearing 410 of the first bearing structure, and the first bearing structure connecting section 101 and the second bearing structure connecting section 102 of the transmission shaft 100 in the closed space 20. In this way, the closed space 20 is mainly used to place parts that may cause harm to the human body if accidentally touched when the printer is working. Under normal working conditions, the closed space is completely sealed with a cover plate to prevent accidental touch by personnel, and only professionals can open it for operation. The exposed operation space is mainly a space that can also be touched by personnel when the machine is working, such as operating the screen or buttons, replacing carbon ribbons and labels, and will not cause personal injury to personnel. The setting of the first bearing structure, the second bearing structure and the third bearing structure ensure the concentricity of the transmission shaft 100 and the roller 300. In addition, by removing the bearing bracket 620 and pulling out the roller 300, the roller 300 is replaced, and the roller is quickly replaced without removing the synchronous pulley 201, without opening the closed space 20, saving maintenance costs and time. The first connection part 110 has a square or triangular hole, and the structure is simpler. The end of the first connection part 110 passes through the enclosed space 20 and is flush with the side end surface of the enclosed space 20, which can increase the effective rolling length of the roller 300, that is, the rolling area, or reduce the external placement space of the roller 300.

[0040] The preferred embodiments of the present invention are described above with reference to the accompanying drawings, but the scope of the present invention is not limited thereby. A person skilled in the art may implement the present invention in a variety of variations without departing from the scope and essence of the present invention, such as using a feature of one embodiment to obtain another embodiment. Any modification, equivalent substitution and improvement made within the technical concept of the present invention shall be within the scope of the present invention.

Claims

1. A split roller installation structure, characterized in that: The split roller shaft installation structure includes a synchronous pulley, a transmission shaft, a roller shaft, a first bearing structure, a second bearing structure and a third bearing structure. The bearings of the first bearing structure and the second bearing structure are arranged on both sides of the transmission shaft and are respectively connected to the transmission shaft. The synchronous pulley is arranged between the bearings of the first bearing structure and the bearings of the second bearing structure and is detachably connected to the transmission shaft. The first bearing structure and the synchronous pulley are arranged in a confined space. A first connecting portion is provided at an end of the transmission shaft away from the bearing of the first bearing structure, and a second connecting portion is provided at an end of the roller shaft close to the first connecting portion. The first connecting portion and the second connecting portion are rotatably connected to make the transmission shaft and the roller shaft have the same concentricity. The end of the roller shaft away from the second connecting portion is connected to the bearing of the third bearing structure.

2. The split roller installation structure according to claim 1, characterized in that: The synchronous pulley and the transmission shaft are connected by screws, keys, splines, tension sleeves or pins.

3. The split roller installation structure according to claim 1, characterized in that: The first connection portion has a square or triangular hole, and the second connection portion has a square or triangular protrusion corresponding to the square or triangular hole.

4. The split roller installation structure according to claim 1, characterized in that: A positioning groove is provided at the end of the first connecting part, and a positioning hole is provided at the bottom of the positioning groove. The second connecting part includes a flat position and a positioning column. The two ends of the flat position are respectively connected to the end of the roller shaft and the positioning column. When the first connecting part and the second connecting part are connected, the flat position is accommodated in the positioning groove, and the positioning column is accommodated in the positioning hole.

5. The split roller installation structure according to claim 4, characterized in that: The positioning groove is in a fork shape.

6. The split roller installation structure according to claim 1, characterized in that: The end of the first connecting portion passes through the enclosed space and is flush with the side end surface of the enclosed space.

7. The split roller installation structure according to claim 4, characterized in that: The positioning groove passes through the enclosed space and is arranged outside the enclosed space.

8. The split roller installation structure according to claim 1, characterized in that: The first bearing structure includes a transmission shaft bracket, a first bearing and a retaining spring, the first bearing is arranged on the bracket through hole of the transmission shaft bracket, and the retaining spring is clamped with the first bearing. The second bearing structure includes a second bearing, and the second bearing is arranged on the side end surface of the enclosed space. The third bearing structure includes a bearing bracket and a third bearing, and the third bearing is arranged on the bearing bracket.

9. A printer, characterized in that: A split roller installation structure as described in any one of claims 1 to 8 is adopted.

10. The printer according to claim 9, characterized in that: The bearing bracket is detachably arranged on the side plate of the printer, and the bearing bracket is provided with a positioning boss, and the side plate is provided with a third bearing through hole at a position corresponding to the positioning boss, and the positioning boss cooperates with the third bearing through hole for positioning connection.

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