Bushing assembly fixture for printer shaft bracket

Abstract

The invention discloses a bushing assembly fixture for a printer shaft support, comprising a base plate, an assembly guide column, two elastic sleeves, a frame arranged on the bottom surface of the base plate, a lower driving assembly, and an upper driving assembly arranged on the surface of the base plate; the frame is used to support the base plate, and the lower driving assembly drives the assembly guide column to pass through the first through hole of the base plate; the first bushing, the first elastic sleeve, the second elastic sleeve, and the second bushing are inserted into the assembly guide column, and the product is inserted into the assembly guide column; the upper driving assembly presses the product downward, presses the first bushing and the first elastic sleeve into one through hole of the product, and presses the second elastic sleeve and the second bushing into another through hole of the product; the lower driving assembly is also used to drive the assembly guide column to move downward and reset, and the first elastic sleeve and the second elastic sleeve fall out of the product. The automatic pressing method is adopted, and the operation can be performed without professional personnel; the elastic sleeve plays a positioning role, which can avoid the bushing from being offset or tilted when pressing down, and can also play a buffering role, avoiding the product from breaking when pressing in.

Description

Technical Field

[0001] The invention relates to the technical field of mechanical processing, in particular to a bushing assembly fixture for a printer shaft bracket. Background Art

[0002] With the development of intelligent and miniaturized office equipment, especially the low-cost requirements, the processing quality and efficiency of some structural parts are particularly important, such as Figure 1 and Figure 2 (The arrows in the figure only indicate rotation and do not limit the rotation angle and direction) A printer shaft bracket shown in the figure requires a bushing A (such as a copper sleeve) to be assembled in the circular holes on both sides. The existing assembly method is manual operation, requiring a professional operator to manually press the bushing with a sleeve. Since the product (such as the printer shaft bracket) is a casting, the bushing is easily pressed tilted during assembly. Once the bushing is tilted, it is easy to cause product breakage, inconsistent depth, non-concentricity of the upper and lower bushings, and scratches on the bushing surface, resulting in extremely low assembly efficiency.

[0003] Therefore existing technology still needs to be improved and improved. Summary of the Invention

[0004] In view of the above-mentioned deficiencies in the prior art, an object of the present invention is to provide a bushing assembly jig for a printer shaft bracket to solve the problem that the bushing is easily pressed and tilted during the existing manual assembly.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] A bushing assembly jig for a printer shaft bracket is used to press the bushing into the corresponding circular hole of the product. It includes a base plate, an assembly guide column, two elastic sleeves, a frame and a lower drive assembly arranged on the bottom surface of the base plate, and an upper drive assembly arranged on the surface of the base plate;

[0007] The frame is used to support the base plate, and the lower drive assembly is used to drive the assembly guide column to pass through the first through hole on the base plate; the first bushing, the first elastic sleeve, the second elastic sleeve, and the second bushing are inserted into the assembly guide column, and the product is inserted into the assembly guide column; the upper drive assembly is used to press the product downward, pressing the first bushing and the first elastic sleeve into a through hole of the product, and pressing the second elastic sleeve and the second bushing into another through hole of the product; the lower drive assembly is also used to drive the assembly guide column to move downward and reset, and the first elastic sleeve and the second elastic sleeve fall out of the product.

[0008] In the bushing assembly fixture of the printer shaft bracket, the frame includes a first column, a second column, a third column, a fourth column, a first beam, a second beam, a third beam and a fourth beam;

[0009] The four columns are respectively fixed on the four corners of the bottom surface of the base plate; the first crossbeam is fixed between the first column and the second column, the second crossbeam is fixed between the third column and the fourth column, the third crossbeam is fixed between the second column and the third column, and the fourth crossbeam is fixed between the fourth column and the first column.

[0010] In the bushing assembly fixture of the printer shaft bracket, the frame also includes four pads, one side of each pad is tightly attached to and fixed on the four corners of the bottom surface of the base plate, and the four columns are respectively fixed on the other side of the corresponding pad.

[0011] In the bushing assembly fixture of the printer shaft bracket, the lower driving assembly includes a lower cylinder, a first clamping plate, a bayonet, a first lower column, a second lower column and a lower pneumatic valve;

[0012] The lower ends of the first lower column and the second lower column are respectively fixed in the left and right grooves on the top surface of the first splint, and the upper ends of the first lower column and the second lower column are fixed to the bottom surface of the base plate, and the front end cover of the lower cylinder is fixed to the middle part of the bottom surface of the first splint, the bottom of the assembly guide column is clamped in the bayonet, and the top of the assembly guide column is inserted into the first through hole, one end of the lower push rod of the lower cylinder is inserted into and fixed in the front end cover of the lower cylinder, and the other end of the lower push rod passes through the through hole in the middle of the first splint and is inserted into the bottom of the bayonet, and the other end of the lower push rod is fastened with the bayonet by a bolt, and the lower pneumatic valve is fixed to the surface of the base plate and pneumatically connected to the lower cylinder.

[0013] In the bushing assembly fixture of the printer shaft bracket, the upper drive assembly includes an upper cylinder, an upper pneumatic valve, a second clamping plate, a third clamping plate, an upper column, a connecting block and a balance plate;

[0014] The front end cover of the upper cylinder is fixed to the surface of the second plywood, one end of the upper push rod of the upper cylinder is inserted into and fixed in the front end cover of the upper cylinder, the other end of the upper push rod passes through the through hole in the middle of the second plywood and is inserted into the connecting block, the other end of the upper push rod is fastened to the connecting block by bolts, the top of the upper column is fixed in a groove on the bottom surface of the second plywood, the bottom end of the upper column is in the groove on the top surface of the third plywood, the groove on the bottom surface of the second plywood is vertically opposite to the groove on the top surface of the third plywood; the bottom surface of the third plywood is fixed to the surface of the bottom plate, and the balance plate is fixed to the bottom surface of the connecting block.

[0015] In the bushing assembly fixture of the printer shaft bracket, the upper drive component also includes two directional columns, one end of the two directional columns is fixed side by side on the inner side of the balance plate, and the other end of the two directional columns abuts against the inner upper column.

[0016] The bushing assembly fixture of the printer shaft bracket also includes a lower top sleeve and an upper top sleeve. The lower top sleeve is embedded in the first through hole of the base plate and the through hole in the middle of the third clamping plate. The assembly guide column passes through the lower top sleeve, and the upper top sleeve is embedded in the through hole in the middle of the balance plate.

[0017] In the bushing assembly fixture of the printer shaft bracket, the upper drive component also includes two guide columns and two limit columns; one limit column is correspondingly inserted into one guide column, the bottoms of the two guide columns are respectively inserted and fixed in the slots on both sides of the third splint, and the tops of the two guide columns extend or move out of the through holes on both sides of the balance plate.

[0018] Compared to the prior art, the present invention provides a bushing assembly fixture for a printer shaft support, comprising a base plate, an assembly guide post, two elastic sleeves, a frame disposed on the bottom surface of the base plate, a lower drive assembly, and an upper drive assembly disposed on the surface of the base plate. The frame supports the base plate, and the lower drive assembly drives the assembly guide post through a first through-hole in the base plate. A first bushing, a first elastic sleeve, a second elastic sleeve, and a second bushing are inserted into the assembly guide post, and the product is inserted into the assembly guide post. The upper drive assembly presses the product downward, pressing the first bushing and the first elastic sleeve into one through-hole in the product, and the second elastic sleeve and the second bushing into another through-hole in the product. The lower drive assembly also drives the assembly guide post downward to reset, causing the first elastic sleeve and the second elastic sleeve to fall out of the product. The fixture utilizes an automatic press method, requiring no specialized personnel and is simple to operate. The elastic sleeves serve as a positioning mechanism, preventing the bushing from shifting or tilting during press-down, and also act as a buffer, preventing product breakage during press-in. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 Illustration of the two faces of an existing printer shaft bracket before installing the bushing.

[0020] Figure 2 Illustration of the two faces of an existing printer shaft bracket after installing bushings.

[0021] Figure 3 This is a schematic diagram of the bushing assembly fixture provided by the present invention.

[0022] Figure 4 This is an exploded view of the bushing assembly jig provided by the present invention.

[0023] Figure 5 This is an exploded view of the frame and lower drive assembly in the bushing assembly fixture provided by the present invention.

[0024] Figure 6 This is a schematic diagram of the upper drive assembly in the bushing assembly fixture provided by the present invention.

[0025] Figure 7A partial schematic diagram of the upper drive assembly and the lower drive assembly provided by the present invention. DETAILED DESCRIPTION

[0026] The present invention provides a bushing assembly fixture for a printer shaft support. To clarify the objectives, technical solutions, and effects of the present invention, the present invention is further described below with reference to the accompanying drawings and examples. It should be understood that the specific examples described herein are intended only to illustrate the present invention and are not intended to limit the present invention.

[0027] Please also see Figures 3 to 7 The embodiment of the present invention provides a bushing assembly fixture for a printer shaft bracket, comprising a base plate 1, an assembly guide column 200, two elastic sleeves, a frame and a lower drive assembly arranged on the bottom surface of the base plate 1, and an upper drive assembly arranged on the surface of the base plate 1; the frame is used to support the base plate 1, the lower drive assembly is used to drive the assembly guide column 200 to pass through the first through hole 6 on the base plate 1, the first bushing 301, the first elastic sleeve 51, the second elastic sleeve 52 (the openings of the two elastic sleeves are opposite to each other), and the second bushing 302 is arranged from the upper The assembly guide post 200 is inserted into the assembly guide post 200 in order from top to bottom, and the product 100 (i.e., the printer shaft bracket) is inserted into the assembly guide post 200 (i.e., the assembly guide post 200 passes through the two round holes of the product 100) and is located above the first bushing; the upper drive component is used to press the product 100 downward, press the first bushing and the first elastic sleeve into a through hole of the product 100, and press the second elastic sleeve and the second bushing into another through hole of the product 100; the lower drive component is also used to drive the assembly guide post 200 to move downward and reset, and the elastic sleeve falls out of the product.

[0028] The bushing has an interference fit with the product's through-hole, and the diameter of the elastic sleeve is slightly smaller than the through-hole. This allows the sleeve to fall out of the product after the guide post is lowered and reset. The elastic sleeve acts as a positioning mechanism, preventing the bushing from shifting or tilting during downward pressure, and also acts as a buffer to prevent product breakage during pressure insertion.

[0029] like Figure 5 As shown, the frame includes a first column 21, a second column 22, a third column 23, a fourth column 24, a first crossbeam 31 (longer), a second crossbeam 32 (equal in length to the first crossbeam 31), a third crossbeam 33 (shorter) and a fourth crossbeam 34 (equal in length to the third crossbeam 33); the four columns are respectively fixed on the four corners of the bottom surface of the base plate 1; the first crossbeam 31 is fixed between the first column 21 and the second column 22, the second crossbeam 32 is fixed between the third column 23 and the fourth column 24, the third crossbeam 33 is fixed between the second column 22 and the third column 23, and the fourth crossbeam 34 is fixed between the fourth column 24 and the first column 21.

[0030] By arranging each crossbeam between the corresponding columns, a stabilizing effect can be achieved, preventing the columns from deforming during use and affecting the balance of the base plate 1. Each crossbeam can be fixed on the same plane to form a rectangle, such as Figure 5 The beams and columns can be fixed by welding.

[0031] Preferably, the frame further comprises four pads 4, one side of each pad being closely attached to and fixed (screwed) on the four corners of the bottom surface of the base plate 1, and the four uprights being fixed on the other side of the corresponding pad. The pads 4 serve to adjust the balance.

[0032] like Figure 3 、 Figure 5 and Figure 7 As shown, the lower drive assembly includes a lower cylinder 7, a first clamping plate 8, a bayonet 9, a first lower column 10, a second lower column 11 and a lower pneumatic valve 12; the lower ends of the first lower column 10 and the second lower column 11 are respectively fixed (screwed) in the left and right grooves on the top surface of the first clamping plate 8, the upper ends of the first lower column 10 and the second lower column 11 are fixed (screwed) on the bottom surface of the base plate 1, and the front end cover of the lower cylinder 7 is fixed (screwed) in the middle of the bottom surface of the first clamping plate 8 ( The bottom of the assembly guide column 200 is fixed by the four screw holes in the middle of the first splint 8, and the top of the assembly guide column 200 is inserted into the first through hole 6. One end of the lower push rod 71 of the lower cylinder 7 is inserted into and fixed in the front end cover of the lower cylinder 7. The other end of the lower push rod 71 passes through the through hole in the middle of the first splint 8 and is inserted into the bottom of the pin 9. The other end of the lower push rod 71 is fastened to the pin 9 by a bolt. The lower pneumatic valve 12 is fixed to the surface of the base plate 1 and is pneumatically connected to the lower cylinder 7.

[0033] The tail end of the assembly guide post 200 has a cap (the diameter of which is larger than the diameter of the body of the assembly guide post 200 by a predetermined value), thus forming a T-shaped assembly guide post 200. When the bottom of the assembly guide post 200 is engaged with the latch 9, the body of the assembly guide post 200 engages the latch arm (i.e., the vertical groove) of the latch 9, and the cap abuts against the base of the latch 9. The cap is blocked by the latch arm, so that the assembly guide post 200 will not move out of the latch 9 when it moves upward. Combined with the locking force of the latch arm and the lower push rod 71, it is fixed to the latch 9. When the lower pneumatic valve 12 is opened and the lower cylinder 7 drives the lower push rod 71 upward, the latch pin 9 drives the assembly guide post 200 upward together, ejecting the assembly guide post 200 from the first through hole 6 of the base plate 1. When the lower pneumatic valve 12 is opened in the opposite direction, the lower cylinder 7 drives the lower push rod 71 downward to reset.

[0034] like Figure 3 、 Figure 6 and Figure 7As shown, the upper drive assembly includes an upper cylinder 13, an upper pneumatic valve 14, a second splint 15, a third splint 16, an upper column 17, a connecting block 18 and a balance plate 19; the front end cover of the upper cylinder 13 is fixed (screwed fixed) on the surface of the second splint 15, one end of the upper push rod 20 of the upper cylinder 13 is inserted into and fixed in the front end cover of the upper cylinder 13, the other end of the upper push rod 20 passes through the through hole in the middle of the second splint 15 and is inserted into the connecting block 18, the other end of the upper push rod 20 is fastened to the connecting block 18 by a bolt 21, the top end of the upper column 17 is fixed (screwed fixed) in a groove on the bottom surface of the second splint 15, the bottom end of the upper column 17 is (screwed fixed) in the groove on the top surface of the third splint 16, and the groove on the bottom surface of the second splint 15 is vertically opposite to the groove on the top surface of the third splint 16. The bottom surface of the third clamping plate 16 is fixed (screwed) to the surface of the bottom plate 1, and the balance plate 19 is fixed to the bottom surface of the connecting block 18 (screws are inserted into the screw holes on the left and right sides of the connecting block 18 and the corresponding screw holes on the balance plate 19 for screwing and fixing).

[0035] The second clamping plate 15 is used to support the upper cylinder 13. The upper column 17 separates the second clamping plate 15 from the third clamping plate 16 to form a vertical concave frame. The connecting block 18 and the balance plate 19 move up and down within the concave frame. When the upper pneumatic valve 14 is opened and the upper cylinder 13 drives the upper push rod 20 downward, the upper push rod 20 drives the connecting block 18 and the balance plate 19 downward together. The top end of the assembly guide column 200 is inserted into the balance plate 19 and the product 100 is pressed downward. The first bushing and the first elastic sleeve on the assembly guide column 200 are pressed into one through-hole of the product 100, and the second elastic sleeve and the second bushing are pressed into the other through-hole of the product 100. When the upper pneumatic valve 14 is opened in the opposite direction, the upper cylinder 13 drives the upper push rod 20 to move upward and reset. The top end of the assembly guide column 200 is moved out from the balance plate 19. At this time, the product 100 has been installed in the bushing and is sleeved on the assembly guide column 200. Then the lower pneumatic valve 12 is opened in the opposite direction, and the lower cylinder 7 drives the lower push rod 71 to move down and reset. The assembly guide column 200 can be removed from the first through hole 6. The assembled product 100 and the two elastic sleeves that fell out of the product remain on the bottom plate 1.

[0036] In a further embodiment, in order to prevent the second splint 15 from being deformed by compression during use, two upper columns can be set side by side, and two grooves are correspondingly set on the bottom surface of the second splint 15 and the surface of the third splint 16, and the support effect is enhanced by adding an upper column.

[0037] In a further embodiment, to prevent the balance plate 19 from shifting when pressed downward, the upper drive assembly further includes two directional posts 22. One end of each directional post 22 is fixed side by side to the inner side of the balance plate 19, and the other end of each directional post abuts the inner upper post. This allows the upper push rod 20 to descend and ascend in parallel. As the balance plate 19 moves up and down, the two directional posts correspondingly move along the upper post, ensuring that the balance plate 19 moves vertically parallel to the upper post.

[0038] In a further embodiment, in order to ensure that the elastic sleeve can press the bushing into the circular hole of the product and will not be pressed off-center, the bushing assembly fixture also includes a lower top sleeve 23 and an upper top sleeve 24. The lower top sleeve 23 is embedded in the first through hole 16 of the base plate 1 and the through hole between the third clamping plate 16 (these two through holes are aligned and have the same aperture). The assembly guide column 200 passes through the lower top sleeve 23, and the upper top sleeve 24 is embedded in the through hole in the middle of the balance plate 19. When the balance plate 19 is pressed down, the top end of the assembly guide column 200 is inserted into the upper top sleeve 24. It should be understood that the lower top sleeve 23 and the upper top sleeve 24 are cylindrical sleeves with internal openings, and the internal apertures are preferably selected to ensure that the assembly guide column 200 can move smoothly and the bushing will not be pressed into the upper and lower top sleeves.

[0039] In a further embodiment, to prevent the balance plate 19 from excessively moving downward and crushing the product 100, the upper drive assembly further includes two guide posts 25 and two limiting posts 26. Each limiting post 26 is inserted into a corresponding guide post 25, and the bottoms of the two guide posts 25 are respectively inserted into and fixed in the slots on either side of the third clamping plate 16. The tops of the two guide posts 25 extend or move out of the through-holes on either side of the balance plate 19. That is, when the balance plate 19 is pressed downward, the guide posts 25 extend from the through-holes on either side of the balance plate 19, and the limiting posts 26 limit the downward displacement of the balance plate 19, preventing excessive crushing of the product. When the balance plate 19 is moved upward and reset, the guide posts 25 move out of the through-holes on either side of the balance plate 19.

[0040] Please continue reading Figures 3 to 7 The working principle of the bushing assembly fixture of the printer shaft bracket is as follows:

[0041] Open the lower pneumatic valve to push the guide column out from the bottom plate; insert the first bushing, the first elastic sleeve, the second elastic sleeve, and the second bushing into the assembly guide column in order from top to bottom, with the openings of the two elastic sleeves facing each other; insert product 100 (i.e., the printer shaft bracket) into the assembly guide column and position it above the first bushing; open the upper pneumatic valve to allow the balance plate to pass through the assembly guide column and then press the product downward until the bushing and the corresponding elastic sleeve are pressed into the product, then open the lower pneumatic valve in the opposite direction, the assembly guide column is reset and the assembled product can be taken out, and the elastic sleeve falls out of the through hole of the product.

[0042] In summary, the bushing assembly jig for a printer shaft support provided by the present invention is simple and can be operated without specialized personnel. The elastic sleeve provides positioning, not only aligning the bushing and pressing it into the product's through-hole, but also preventing it from shifting or tilting during pressure, providing a buffering effect and preventing product breakage. This solves the problems of existing products prone to product breakage, inconsistent installation depths, and misalignment during manual assembly, and significantly improves assembly efficiency by over 90%.

[0043] The division of the above functional modules is only for illustration. In actual applications, the above functions can be assigned to different functional modules as needed, that is, divided into different functional modules to complete all or part of the functions described above.

[0044] It is understandable that those skilled in the art can make equivalent substitutions or changes based on the technical solution and inventive concept of the present invention, and all these changes or substitutions should fall within the scope of protection of the claims attached to the present invention.

Claims

1. A bushing assembly jig for a printer shaft support, used to press the bushing into a corresponding circular hole of the product, characterized in that: It includes a base plate, an assembly guide column, a first elastic sleeve, a second elastic sleeve, a frame and a lower driving assembly arranged on the bottom surface of the base plate, and an upper driving assembly arranged on the surface of the base plate; The frame is used to support the bottom plate, and the lower driving assembly is used to drive the assembly guide column to pass through the first through hole on the bottom plate; the first bushing, the first elastic sleeve, the second elastic sleeve, and the second bushing are inserted into the assembly guide column, and the product is inserted into the assembly guide column; the upper driving assembly is used to press the product downward, press the first bushing and the first elastic sleeve into one through hole of the product, and press the second elastic sleeve and the second bushing into another through hole of the product; the lower driving assembly is also used to drive the assembly guide column to move downward and reset, and the first elastic sleeve and the second elastic sleeve fall out of the product; The lower driving assembly comprises a lower cylinder, a first clamping plate, a bayonet, a first lower column, a second lower column and a lower pneumatic valve; The lower ends of the first lower column and the second lower column are respectively fixed in the left and right grooves of the top surface of the first clamping plate, the upper ends of the first lower column and the second lower column are fixed to the bottom surface of the base plate, the front end cover of the lower cylinder is fixed to the middle part of the bottom surface of the first clamping plate, the bottom of the assembly guide column is clamped into the bayonet, the top of the assembly guide column is inserted into the first through hole, one end of the lower push rod of the lower cylinder is inserted into and fixed in the front end cover of the lower cylinder, the other end of the lower push rod passes through the through hole in the middle of the first clamping plate and is inserted into the bottom of the bayonet, the other end of the lower push rod is fastened with the bayonet by a bolt, and the lower pneumatic valve is fixed to the surface of the base plate and pneumatically connected to the lower cylinder; The upper drive assembly includes an upper cylinder, an upper pneumatic valve, a second clamping plate, a third clamping plate, an upper column, a connecting block and a balance plate; The front end cover of the upper cylinder is fixed on the surface of the second clamping plate, one end of the upper push rod of the upper cylinder is inserted into and fixed in the front end cover of the upper cylinder, the other end of the upper push rod passes through the through hole in the middle of the second clamping plate and is inserted into the connecting block, the other end of the upper push rod is fastened to the connecting block by bolts, the top end of the upper column is fixed in a groove on the bottom surface of the second clamping plate, the bottom end of the upper column is in the groove on the top surface of the third clamping plate, the groove on the bottom surface of the second clamping plate is vertically opposite to the groove on the top surface of the third clamping plate; the bottom surface of the third clamping plate is fixed to the surface of the bottom plate, and the balance plate is fixed to the bottom surface of the connecting block; The upper drive assembly further comprises two directional columns, one end of which is fixed side by side on the inner side of the balance plate, and the other end of which is abutted against the inner upper column; It also includes a lower top sleeve and an upper top sleeve, wherein the lower top sleeve is embedded in the first through hole of the bottom plate and the through hole in the middle of the third clamping plate, the assembly guide column passes through the lower top sleeve, and the upper top sleeve is embedded in the through hole in the middle of the balance plate.

2. The bushing assembly fixture of the printer shaft support according to claim 1, characterized in that: The frame includes a first column, a second column, a third column, a fourth column, a first beam, a second beam, a third beam and a fourth beam; The four columns are respectively fixed on the four corners of the bottom surface of the base plate; the first crossbeam is fixed between the first column and the second column, the second crossbeam is fixed between the third column and the fourth column, the third crossbeam is fixed between the second column and the third column, and the fourth crossbeam is fixed between the fourth column and the first column.

3. The bushing assembly fixture of the printer shaft support according to claim 2, characterized in that: The frame also includes four cushion blocks, one side of each cushion block is closely attached to and fixed on four corners of the bottom surface of the base plate, and four uprights are respectively fixed on the other side of the corresponding cushion block.

4. The bushing assembly fixture for the printer shaft support according to claim 1, characterized in that: The upper driving assembly also includes two guide columns and two limit columns; one limit column is correspondingly inserted into one guide column, the bottoms of the two guide columns are respectively inserted into and fixed in the slots on both sides of the third clamping plate, and the tops of the two guide columns extend out or move out of the through holes on both sides of the balance plate.

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