Shaft sleeve press-in auxiliary tool

Abstract

A shaft sleeve press-in auxiliary tool belongs to the technical field of shaft sleeve press-fitting, and is characterized in that under the driving of a pressure mechanism, a shaft sleeve press-in mechanism and a seat hole press-in mechanism respectively move downwards, the shaft sleeve press-in mechanism is matched with a shaft sleeve limiting mechanism to press a shaft sleeve into a shaft sleeve positioning mechanism, and then the seat hole press-in mechanism is matched with a seat hole limiting mechanism to press a seat hole downwards; the shaft sleeve gradually enters the seat hole in the state that the shaft sleeve is restrained by the shaft sleeve positioning mechanism, and finally product press fitting is completed. The shaft sleeve press-in mechanism solves the problem that a shaft sleeve with poor roundness is easy to scratch a seat hole when being pressed into the seat hole after being shaped, has no large requirement on the placement of the shaft sleeve, and can be guided in the descending process of the shaft sleeve press-in mechanism, so that the problems that the shaft sleeve is difficult to place by staff and the consumed time is long are solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to a kind of shaft sleeve press-in auxiliary tool, belong to shaft sleeve press-mounting technical field. BACKGROUND

[0002] Seat hole is generally used to install the hole of bearing, shaft and other components, as shown in Figure 1 Most manufacturers will press a shaft sleeve 2 in seat hole 1 inner diameter surface, and tight fit between shaft sleeve and seat hole, to improve the lubrication performance between seat hole and bearing or shaft, reduce friction.

[0003] At present, most manufacturers press shaft sleeve using press directly into seat hole, and this press-mounting method is guided by shaft sleeve outer chamfer and seat hole chamfer. When the roundness of shaft sleeve to be pressed is poor, if the above-mentioned press-mounting method is used, it is difficult for staff to place shaft sleeve stably on seat hole chamfer during press-mounting process, and when shaft sleeve is placed skew, it is most likely to scratch shaft sleeve outer diameter surface or seat hole inner diameter surface, and metal debris generated by scratching is easy to embed in shaft sleeve inner diameter surface, and even shaft sleeve can be damaged. UTILITY MODEL CONTENTS

[0004] The utility model aims at the deficiency of prior art, and provides a kind of shaft sleeve press-in auxiliary tool, solve the problem that poor roundness of shaft sleeve after shaping is easy to scratch seat hole when being pressed into seat hole, and there is no great requirement for the placement of shaft sleeve, shaft sleeve is guided during the downward process of shaft sleeve press-in mechanism, reduce the problem that staff is difficult to place shaft sleeve and time-consuming.

[0005] The technical scheme of the utility model is as follows:

[0006] A kind of shaft sleeve press-in auxiliary tool, characterized by, including pressure mechanism, press-mounting mechanism, rack, the press-mounting mechanism includes die carrier, shaft sleeve press-in mechanism, seat hole press-in mechanism, shaft sleeve positioning mechanism, seat hole positioning mechanism, shaft sleeve limiting mechanism, seat hole limiting mechanism, unloading mechanism.

[0007] The rack includes top plate, bottom plate, the pressure mechanism is installed on rack top plate, can use booster cylinder, oil cylinder and other power equipment;The die carrier is installed on rack bottom plate and is located just below the pressure mechanism.

[0008] The seat hole press-in mechanism is installed on the top of die carrier, and the shaft sleeve press-in mechanism is nested in the seat hole press-in mechanism.The bottom of the shaft sleeve limiting mechanism is nested in the seat hole limiting mechanism, and both are fixedly installed on the bottom of die carrier.The top of the shaft sleeve limiting mechanism is nested in the shaft sleeve positioning mechanism, and the shaft sleeve positioning mechanism is nested in the seat hole positioning mechanism, the shaft sleeve positioning mechanism is used to place shaft sleeve, and the seat hole positioning mechanism is used to place seat hole.

[0009] Under the drive of pressure mechanism, the shaft sleeve pressing mechanism and the seat hole pressing mechanism respectively descend, the shaft sleeve pressing mechanism cooperates with the shaft sleeve limiting mechanism, the shaft sleeve is pressed into the shaft sleeve positioning mechanism, then the seat hole pressing mechanism cooperates with the seat hole limiting mechanism, the seat hole is pressed down, the shaft sleeve gradually enters the seat hole under the constraint of the shaft sleeve positioning mechanism, and finally the product pressing is completed.

[0010] The utility model can assist the shaft sleeve to be guided, and the shaft sleeve positioning mechanism (slightly larger than the seat hole, high hardness, low roughness) is pressed into the shaft sleeve before being pressed into the seat hole, the shaft sleeve enters the seat hole under the constraint of the shaft sleeve positioning mechanism, the damage of the shaft sleeve and the seat hole can be greatly reduced, and the shaft sleeve can be avoided from being scrapped due to placement problems.

[0011] The structural features of the components in the pressing mechanism are as follows:

[0012] 1、The mold frame comprises a pressing plate, a pair of guide columns, a pair of guide sleeves, a pair of mold frame springs and a fixed plate; the fixed plate is installed on the bottom plate of the rack, the pressing plate is arranged in parallel above the fixed plate and directly below the pressure mechanism; a pair of guide sleeves are symmetrically installed at the bottom of the pressing plate, a pair of guide columns pass through the pair of guide sleeves respectively, and the bottom of the guide column is fixedly installed on the fixed plate; the pressing plate is slidably matched with the guide sleeves and the guide columns; a pair of mold frame springs are respectively sleeved on the pair of guide columns, and the pair of mold frame springs are respectively compressed between the end face of the guide sleeve and the fixed plate.

[0013] The pressure mechanism descends to drive the pressing plate to descend against the force of the mold frame spring; the pressure mechanism ascends, and the pressing plate is reset upward under the action of the mold frame spring.

[0014] 2、The shaft sleeve pressing mechanism comprises a shaft sleeve pressing head, which is installed below the pressing plate of the mold frame; the head of the shaft sleeve pressing head is provided with a first outer diameter face, a second outer diameter face and a third outer diameter face from small to large in diameter; the third outer diameter face is located above the second outer diameter face, the second outer diameter face is located above the first outer diameter face, and the first outer diameter face is connected with the end face of the shaft sleeve pressing head; a first pressing step is formed between the first outer diameter face and the second outer diameter face, and a second pressing step is formed between the second outer diameter face and the third outer diameter face.

[0015] Further, the outer diameter of the second outer diameter face is equal to the inner diameter of the shaft sleeve to cooperate with the inner diameter of the shaft sleeve and support and fix the shaft sleeve. The outer diameter of the third outer diameter face is equal to the outer diameter of the shaft sleeve and equal to the inner diameter of the seat hole to cooperate with the upper end face of the shaft sleeve and drive the shaft sleeve to descend.

[0016] Further, the first outer diameter face and the second outer diameter face are respectively provided with chamfers for easy introduction.

[0017] 3、The seat hole pressing mechanism comprises a seat hole pressing sleeve, which is fixedly installed at the bottom of the pressing plate of the mold frame and sleeved outside the shaft sleeve pressing head, and an upper pressing spring is arranged between the root of the shaft sleeve pressing head and the pressing plate, and the shaft sleeve pressing head can slide up and down in the seat hole pressing sleeve.

[0018] Further, the head of the seat hole press-fit sleeve is provided with a seat hole press-fit step on the end face to cooperate with the upper end face of the seat hole to drive the seat hole downward.

[0019] 4. The shaft sleeve positioning mechanism comprises a shaft sleeve positioning block coaxially installed below the shaft sleeve press-fit head; the shaft sleeve positioning block is provided with a central through hole, and the outer diameter surface of the shaft sleeve positioning block is provided with a small-diameter outer circular surface and a large-diameter outer circular surface from top to bottom, and the small-diameter and large-diameter outer circular surfaces form a seat hole limiting step A.

[0020] Further, the central through hole of the shaft sleeve positioning block has a hole diameter equal to the outer diameter of the shaft sleeve, and the hole opening is provided with a guide right-angle chamfer.

[0021] Further, the lower end face of the shaft sleeve positioning block is symmetrically provided with two axial first positioning pin sliding holes.

[0022] 5. The seat hole positioning mechanism comprises a seat hole positioning block sleeved outside the shaft sleeve positioning block; the seat hole positioning block is provided with a small-diameter through hole and a large-diameter through hole from top to bottom; the end face of the small-diameter through hole is provided with a seat hole positioning step for placing the seat hole to cooperate with the step surface of the lower end face of the seat hole.

[0023] Further, the hole diameter of the large-diameter through hole of the seat hole positioning block matches the outer diameter of the large-diameter outer circular surface of the shaft sleeve positioning block, and the hole diameter of the small-diameter through hole of the seat hole positioning block matches the outer diameter of the small-diameter outer circular surface of the shaft sleeve positioning block. The small-diameter through hole and the large-diameter through hole form a seat hole limiting step B. The seat hole positioning block can slide up and down along the shaft sleeve positioning block and be limited by the seat hole limiting step A and the seat hole limiting step B.

[0024] Further, the end face of the seat hole positioning block is symmetrically provided with two axial second positioning pin sliding holes.

[0025] 6. The shaft sleeve limiting mechanism comprises a shaft sleeve limiting column fixedly installed on the fixed plate of the mold frame below the shaft sleeve press-fit head and coaxial with the shaft sleeve press-fit head; the shaft sleeve positioning block is sleeved outside the shaft sleeve limiting column and can slide with the shaft sleeve limiting column; the upper end face of the shaft sleeve limiting column is provided with a limiting blind hole to cooperate with the end face of the shaft sleeve press-fit head.

[0026] Further, the outer diameter of the shaft sleeve limiting column matches the outer diameter of the shaft sleeve, and matches the hole diameter of the central through hole of the shaft sleeve positioning block.

[0027] Further, the hole diameter of the limiting blind hole matches the outer diameter of the first outer diameter surface of the shaft sleeve press-fit head, and the limiting blind hole and the end face form a shaft sleeve limiting step. After the shaft sleeve press-fit head is lowered into position, the end face is located in the limiting blind hole, the first press-fit step matches the shaft sleeve limiting step, and the second press-fit step matches the upper end face of the shaft sleeve.

[0028] 7. The seat hole limiting mechanism comprises a seat hole limiting block, which is provided with a center hole, is sleeved on the shaft sleeve limiting column, and is fixedly installed on the fixed plate of the mold frame; a first downward spring is arranged between the seat hole limiting block and the shaft sleeve positioning block, and a second downward spring is arranged between the seat hole limiting block and the seat hole positioning block.

[0029] Further, the end surface of the seat hole limiting block is respectively provided with a mounting hole of the first downward spring and a mounting hole of the second downward spring.

[0030] Further, the number of the first downward spring and the second downward spring is four respectively, which are symmetrically and uniformly distributed.

[0031] Further, the end surface of the seat hole limiting block is provided with a first positioning pin fixing hole corresponding to the position of the first positioning pin sliding hole, and the end surface of the seat hole limiting block is provided with a second positioning pin fixing hole corresponding to the position of the second positioning pin sliding hole. The first positioning pin is arranged between the first positioning pin sliding hole and the first positioning pin fixing hole to ensure the axial displacement of the shaft sleeve positioning block. The second positioning pin is arranged between the second positioning pin sliding hole and the second positioning pin fixing hole to ensure the axial displacement of the seat hole positioning block.

[0032] 8. The unloading mechanism comprises a U-shaped frame and a vertical plate, the vertical plate is vertically installed on the fixed plate of the mold frame, the U-shaped frame is installed on the vertical plate, the two side arms of the U-shaped frame are respectively arranged on the two sides of the seat hole pressing sleeve, and the distance between the two side arms of the U-shaped frame is less than the outer diameter of the seat hole. In the reset upward process of the shaft sleeve pressing head, the U-shaped frame limits the seat hole provided with the shaft sleeve, so that the pressed seat hole is separated from the shaft sleeve pressing head.

[0033] When the tool is used:

[0034] (1) the shaft sleeve is placed on the shaft sleeve positioning block (the shaft sleeve is located at the guide chamfer at the center through hole opening), and then the seat hole is placed on the seat hole positioning block (the seat hole is located at the seat hole positioning step of the seat hole positioning block);

[0035] (2) the pressure mechanism is started, the pressing plate goes down, and the shaft sleeve pressing head contacts the shaft sleeve (the second pressing step of the shaft sleeve pressing head contacts the upper end surface of the shaft sleeve);

[0036] (3) the pressing plate continues to go down, and the shaft sleeve pressing head starts to press the shaft sleeve into the center through hole of the shaft sleeve positioning block; at this time, the seat hole pressing sleeve contacts the seat hole;

[0037] (4) the pressing plate continues to go down, and the shaft sleeve is completely pressed into the center through hole of the shaft sleeve positioning block; at this time, the seat hole goes down with the seat hole positioning block, and the shaft sleeve positioning block contacts the seat hole positioning block (the seat hole limiting step A and the seat hole limiting step B are attached);

[0038] (5) the pressing plate continues to descend, the shaft sleeve contacts the upper end surface of the shaft sleeve limiting column; at this time, the shaft sleeve positioning block and the seat hole positioning block descend as a whole;

[0039] (6) the pressing plate continues to descend, the shaft sleeve compression head is compressed (the shaft sleeve compression head contacts the limiting blind hole of the shaft sleeve limiting column); at this time, the seat hole descends as a whole with the shaft sleeve positioning block and the seat hole positioning block, and the shaft sleeve enters the seat hole;

[0040] (7) the pressing plate continues to descend until the seat hole positioning block and the shaft sleeve positioning block contact the seat hole limiting block after overcoming the spring force, and the descending ends;

[0041] (8) the pressure mechanism ascends, the pressing plate resets, and the shaft sleeve installed in the seat hole ascends along with the pressing plate due to the interference of the inner diameter supporting portion of the shaft sleeve compression head, and falls freely after contacting the U-shaped frame of the unloading mechanism.

[0042] The seat hole is placed at a higher height in the utility model, so that the shaft sleeve is prevented from being inclined due to contact with the shaft sleeve when the seat hole is placed; when the shaft sleeve is pressed into the seat hole, the outer diameter surface of the shaft sleeve is constrained by the shaft sleeve positioning block, and the inner diameter surface is constrained by the size of the shaft sleeve compression head, and meanwhile, the end surfaces of the seat hole and the shaft sleeve are prevented from colliding, so that the problem that the shaft sleeve is difficult to press into the seat hole is effectively solved.

[0043] The utility model discloses a seat hole positioning mechanism, a shaft sleeve positioning mechanism, a shaft sleeve pressing mechanism and a seat hole pressing mechanism are replaced to adapt to the pressing of different models of products. In the utility model, after the shaft sleeve and the seat hole are placed on the corresponding positioning blocks, all subsequent actions are completed by the pressure equipment under single stroke, the difficulty and time of placing the shaft sleeve are reduced, the success rate of pressing is improved, and the problems of scratching and embedding of iron scraps in the inner diameter surface are reduced. ACCURACY OF DRAWINGS

[0044] Figure 1 It is a structure schematic view of the seat hole and the shaft sleeve in the utility model;

[0045] Figure 2 It is a structure schematic view of the shaft sleeve pressing auxiliary tool in the utility model;

[0046] Figure 3 It is a structure schematic view of the pressing mechanism in the utility model;

[0047] Figure 4 It is a front view of Figure 3 ;

[0048] Figure 5 It is a structure schematic view of the shaft sleeve compression head in the utility model;

[0049] Figure 6 It is a structure schematic view of the seat hole pressing sleeve in the utility model;

[0050] Figure 7 It is structure schematic view of axle sleeve positioning block in the utility model;

[0051] Figure 8 It is structure schematic view of axle sleeve positioning block in the utility model; Figure 7 It is structure schematic view of axle sleeve positioning block in the utility model;

[0052] Figure 9 It is structure schematic view of axle sleeve positioning block in the utility model;

[0053] Figure 10 It is structure schematic view of axle sleeve positioning block in the utility model; Figure 9 It is structure schematic view of axle sleeve positioning block in the utility model;

[0054] Figure 11 It is structure schematic view of axle sleeve positioning block in the utility model;

[0055] Figure 12 It is structure schematic view of axle sleeve positioning block in the utility model;

[0056] Figure 13 It is structure schematic view of axle sleeve positioning block in the utility model; Figure 12 It is structure schematic view of axle sleeve positioning block in the utility model;

[0057] Figures 14-20 It is structure schematic view of axle sleeve positioning block in the utility model;

[0058] In the drawing: seat hole 1;Axle sleeve 2;Pressure mechanism 3;Top plate 4-1, bottom plate 4-2;

[0059] Die frame 5, pressing plate 5-1, guide column 5-2, guide sleeve 5-3, die frame spring 5-4, fixed plate 5-5;

[0060] Axle sleeve pressing head 6, first outer diameter surface 6-1, second outer diameter surface 6-2, third outer diameter surface 6-3;

[0061] Seat hole pressing sleeve 7;Axle sleeve positioning block 8, center through hole 8-1, small diameter outer cylindrical surface 8-2, large diameter outer cylindrical surface 8-3, guide reverse chamfer 8-4, first positioning pin sliding hole 8-5;

[0062] Seat hole positioning block 9, small diameter through hole 9-1, large diameter through hole 9-2, seat hole positioning step 9-3, second positioning pin sliding hole 9-4;

[0063] Axle sleeve limiting column 10, limiting blind hole 10-1;Seat hole limiting block 11, first lower pressing spring mounting hole 11-1, second lower pressing spring mounting hole 11-2, first positioning pin fixing hole 11-3, second positioning pin fixing hole 11-4;

[0064] U-shaped frame 12;Upper pressing spring 13;First lower pressing spring 14;Second lower pressing spring 15;Stand plate 16. DETAILED DESCRIPTION

[0065] A sleeve pressing auxiliary tool, a pressure mechanism 3, a pressing mechanism, a rack, the rack comprising a top plate 4-1 and a bottom plate 4-2, and the pressure mechanism being installed on the top plate of the rack.

[0066] The pressing mechanism comprises a die frame 5, a sleeve pressing head 6, a seat hole pressing sleeve 7, a sleeve positioning block 8, a seat hole positioning block 9, a sleeve limiting column 10, a seat hole limiting block 11 and a U-shaped frame 12.

[0067] 1) The die frame 5 comprises a pressing plate 5-1, a pair of guide columns 5-2, a pair of guide sleeves 5-3, a pair of die frame springs 5-4 and a fixing plate 5-5. The fixing plate is installed on the bottom plate of the rack, the pair of guide sleeves are symmetrically installed at the bottom of the pressing plate, the pair of guide columns pass through the pair of guide sleeves respectively, the bottom of the guide column is fixed to the fixing plate, and the pressing plate is slidably connected to the guide column through the guide sleeve. The pair of die frame springs are respectively sleeved on the pair of guide columns, and the pair of die frame springs are respectively compressed between the end face of the guide sleeve and the fixing plate.

[0068] 2) The sleeve pressing head 6 is installed below the pressing plate of the die frame, and the outer diameter surface of the head portion is provided with a first outer diameter surface 6-1, a second outer diameter surface 6-2 and a third outer diameter surface 6-3 from small to large. The third outer diameter surface is located above the second outer diameter surface, the second outer diameter surface is located above the first outer diameter surface, and the first outer diameter surface is connected with the end surface of the sleeve pressing head. The first and second outer diameter surfaces form a first pressing step, and the second and third outer diameter surfaces form a second pressing step.

[0069] 3) The seat hole pressing sleeve 7 is fixedly installed at the bottom of the pressing plate of the die frame and is sleeved outside the sleeve pressing head, and an upper pressing spring 13 is arranged between the root portion of the sleeve pressing head and the pressing plate. The sleeve pressing head can slide up and down in the seat hole pressing sleeve.

[0070] 4) The sleeve positioning block 8 is installed directly below the sleeve pressing head, and the sleeve positioning block is provided with a center through hole 8-1. The outer diameter surface of the sleeve positioning block is provided with a small-diameter outer circular surface 8-2 and a large-diameter outer circular surface 8-3 from top to bottom. The small-diameter outer circular surface and the large-diameter outer circular surface form a seat hole limiting step A.

[0071] In an embodiment of the present application, the center through hole of the sleeve positioning block has a hole diameter equal to the outer diameter of the sleeve, and the hole has a guide chamfer 8-4.

[0072] 5) The seat hole positioning block 9 is sleeved outside the sleeve positioning block and is provided with a small-diameter through hole 9-1 and a large-diameter through hole 9-2 from top to bottom. The end surface of the small-diameter through hole is provided with a seat hole positioning step 9-3 for placing the seat hole.

[0073] 6) The sleeve limiting column 10 is fixedly installed on the fixing plate of the die frame and is located directly below and coaxial with the sleeve pressing head. The sleeve positioning block is sleeved outside the sleeve limiting column and can be slidably connected with the sleeve limiting column. The upper end surface of the sleeve limiting column is provided with a limiting blind hole 10-1 for cooperating with the end surface of the sleeve pressing head.

[0074] 7)The seat hole limiting block 11 is provided with a center hole, is sleeved on the shaft sleeve limiting column, and is fixedly installed on the fixed plate of the mold frame. The first downward spring 14 is arranged between the seat hole limiting block and the shaft sleeve positioning block, and the second downward spring 15 is arranged between the seat hole limiting block and the seat hole positioning block.

[0075] In an embodiment of the utility model, the number of the first downward spring and the second downward spring is four respectively, and the first downward spring and the second downward spring are symmetrically and evenly distributed. The end surface of the seat hole limiting block is respectively provided with the mounting hole 11-1 of the first downward spring and the mounting hole 11-2 of the second downward spring.

[0076] 8)The U-shaped frame 12 is installed on the vertical plate 16, the vertical plate is vertically installed on the fixed plate of the mold frame, the two side arms of the U-shaped frame are respectively arranged on the two sides of the seat hole press-fitting sleeve, and the distance between the two side arms of the U-shaped frame is less than the outer diameter of the seat hole. In the reset upward process of the shaft sleeve press-fitting head, the U-shaped frame separates the press-fitted seat hole from the shaft sleeve press-fitting head.

[0077] In an embodiment of the utility model, the lower end surface of the shaft sleeve positioning block 8 is symmetrically provided with two axial first positioning pin sliding holes 8-5, and the end surface of the seat hole positioning block is symmetrically provided with two axial second positioning pin sliding holes 9-4. The end surface of the seat hole limiting block 11 is provided with a first positioning pin fixing hole 11-3 and a second positioning pin fixing hole 11-4. The first positioning pin is arranged between the first positioning pin sliding hole and the first positioning pin fixing hole, and the second positioning pin is arranged between the second positioning pin sliding hole and the second positioning pin fixing hole.

[0078] In an embodiment of the utility model, the outer diameter of the second outer diameter surface of the shaft sleeve press-fitting head is equal to the inner diameter of the shaft sleeve, so as to cooperate with the inner diameter of the shaft sleeve and support and fix the shaft sleeve. The outer diameter of the third outer diameter surface of the shaft sleeve press-fitting head is equal to the outer diameter of the shaft sleeve and is equal to the inner diameter of the seat hole, so as to cooperate with the upper end surface of the shaft sleeve and drive the shaft sleeve to move downward.

[0079] In an embodiment of the utility model, the hole diameter of the large-diameter through hole of the seat hole positioning block matches the outer diameter of the large-diameter outer circle surface of the shaft sleeve positioning block, and the hole diameter of the small-diameter through hole of the seat hole positioning block matches the outer diameter of the small-diameter outer circle surface of the shaft sleeve positioning block. The small-diameter through hole and the large-diameter through hole form a seat hole limiting step B. The seat hole positioning block can slide up and down along the shaft sleeve positioning block and is limited by the seat hole limiting step A and the seat hole limiting step B.

[0080] In an embodiment of the utility model, the outer diameter of the shaft sleeve limiting column is equal to the outer diameter of the shaft sleeve and matches the hole diameter of the center through hole of the shaft sleeve positioning block.

[0081] In an embodiment of the utility model, the hole diameter of the limiting blind hole matches the outer diameter of the first outer diameter surface of the shaft sleeve press fitting head, and the limiting blind hole and the end face form a shaft sleeve limiting step. After the shaft sleeve press fitting head is lowered to the position, the end face is located in the limiting blind hole, the first press fitting step is attached to the shaft sleeve limiting step, and the second press fitting step is attached to the upper end face of the shaft sleeve.

[0082] The press fitting process of the above tool is as follows:

[0083] (1) as shown in Figure 14 , the shaft sleeve 2 is placed on the shaft sleeve positioning block 8 (the shaft sleeve 2 is located at the pilot chamfer 8-4 at the center through hole 8-1 orifice), and then the seat hole 1 is placed on the seat hole positioning block 9 (the seat hole 1 is located at the seat hole positioning step 9-3 of the seat hole positioning block);

[0084] (2) as shown in Figure 15 , the pressure mechanism is started, the pressing plate 5-1 is lowered, and the shaft sleeve press fitting head 6 contacts the shaft sleeve 2 (the second press fitting step of the shaft sleeve press fitting head contacts the upper end face of the shaft sleeve);

[0085] (3) as shown in Figure 16 , the pressing plate 5-1 continues to descend, and the shaft sleeve press fitting head 6 starts to press the shaft sleeve 2 into the center through hole 8-1 of the shaft sleeve positioning block; at this time, the seat hole press fitting sleeve 7 contacts the seat hole 1;

[0086] (4) as shown in Figure 17 , the pressing plate 5-1 continues to descend, and the shaft sleeve 2 is completely pressed into the center through hole 8-1 of the shaft sleeve positioning block; at this time, the seat hole 1 and the seat hole positioning block 9 descend, and the shaft sleeve positioning block 8 contacts the seat hole positioning block 9 (the seat hole limiting step A and the seat hole limiting step B are attached);

[0087] (5) as shown in Figure 18 , the pressing plate 5-1 continues to descend, and the shaft sleeve 2 contacts the upper end face of the shaft sleeve limiting column 10; at this time, the shaft sleeve positioning block 8 and the seat hole positioning block 9 are integrally moved downward;

[0088] (6) as shown in Figure 19 , the pressing plate 5-1 continues to descend, and the shaft sleeve press fitting head 6 is compressed (the shaft sleeve press fitting head contacts the limiting blind hole 10-1 of the shaft sleeve limiting column); at this time, the seat hole 1 and the seat hole positioning block 9 integrally move downward with the shaft sleeve positioning block 8, and the shaft sleeve 2 enters the seat hole 1;

[0089] (7) the pressing plate continues to descend until the seat hole positioning block 9 and the shaft sleeve positioning block 8 contact the seat hole limiting block 11 after overcoming the spring force, and the descending is ended;

[0090] (8) as shown in Figure 20As shown, the pressure mechanism goes up, the pressure plate resets, the shaft sleeve installed in the seat hole 1 follows the pressure plate up due to the interference between the inner diameter support part of the shaft sleeve press-fit head 6 and the shaft sleeve, and freely falls after contacting the U-shaped frame 12 of the unloading mechanism.

Claims

1. A bush press-in assisting tool characterized by, Including pressure mechanism, pressure mechanism, the pressure mechanism includes: shaft sleeve pressure mechanism, seat hole pressure mechanism, shaft sleeve positioning mechanism, seat hole positioning mechanism, shaft sleeve limiting mechanism, seat hole limiting mechanism; The shaft sleeve pressure mechanism is nested in the seat hole pressure mechanism, the bottom of the shaft sleeve limiting mechanism is nested in the seat hole limiting mechanism, the top of the shaft sleeve limiting mechanism is nested in the shaft sleeve positioning mechanism, the shaft sleeve positioning mechanism is nested in the seat hole positioning mechanism, the shaft sleeve positioning mechanism is used for placing the shaft sleeve, and the seat hole positioning mechanism is used for placing the seat hole. The pressure mechanism drives the shaft sleeve pressure mechanism and the seat hole pressure mechanism to descend, the shaft sleeve pressure mechanism cooperates with the shaft sleeve limiting mechanism, the shaft sleeve is pressed into the shaft sleeve positioning mechanism, the seat hole pressure mechanism cooperates with the seat hole limiting mechanism, the seat hole is pressed downward, and the shaft sleeve is gradually pressed into the seat hole.

2. The bushing press-in auxiliary tool according to claim 1, wherein The pressure mechanism further comprises a mold frame; the mold frame comprises a pressure plate, a pair of guide columns, a pair of guide sleeves, and a pair of mold frame springs; a pair of guide sleeves are symmetrically installed at the bottom of the pressure plate, a pair of guide columns pass through a pair of guide sleeves respectively, and the pressure plate is slidably connected with the guide columns through the guide sleeves; a pair of mold frame springs are respectively sleeved on a pair of guide columns and are respectively compressed at the lower end surface of the guide sleeve.

3. The bushing press-in assist tool of claim 1, wherein, The shaft sleeve pressure mechanism comprises a shaft sleeve pressing head; the head of the shaft sleeve pressing head is provided with a first outer diameter surface, a second outer diameter surface and a third outer diameter surface from small to large in diameter; the third outer diameter surface is located above the second outer diameter surface, and the second outer diameter surface is located above the first outer diameter surface.

4. The bushing press-in assist tool of claim 3, wherein, The seat hole pressure mechanism comprises a seat hole pressing sleeve, which is sleeved outside the shaft sleeve pressing head, and an upper compression spring is arranged between the root of the shaft sleeve pressing head and the pressure plate, and the shaft sleeve pressing head can slide up and down in the seat hole pressing sleeve.

5. The bushing press-in assist tool of claim 4, wherein, The shaft sleeve positioning mechanism comprises a shaft sleeve positioning block, and the shaft sleeve positioning block is provided with a center through hole, and the hole opening is provided with a guide chamfer.

6. The bushing press-in assist tool of claim 5, wherein, The seat hole positioning mechanism comprises a seat hole positioning block, and the seat hole positioning block is sleeved outside the shaft sleeve positioning block; the end surface of the seat hole positioning block is provided with a seat hole positioning step for placing the seat hole.

7. The bushing press-in assist tool of claim 6, wherein, The shaft sleeve limiting mechanism comprises a shaft sleeve limiting column; the shaft sleeve positioning block is sleeved outside the shaft sleeve limiting column and can be slidably connected with the shaft sleeve limiting column; the upper end surface of the shaft sleeve limiting column is provided with a limiting blind hole to cooperate with the end surface of the shaft sleeve pressing head.

8. The bushing press-in assist tool of claim 7, wherein, The seat hole limiting mechanism comprises a seat hole limiting block, which is sleeved outside the shaft sleeve limiting column; a first lower compression spring is arranged between the seat hole limiting block and the shaft sleeve positioning block, and a second lower compression spring is arranged between the seat hole limiting block and the seat hole positioning block.

9. The bushing press-in assist tool of claim 1, wherein, The pressure mechanism further comprises a U-shaped frame, and the two side arms of the U-shaped frame are respectively arranged on the two sides of the seat hole pressing sleeve; the distance between the two side arms of the U-shaped frame is less than the outer diameter of the seat hole.

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