Planet carrier subassembly installation structure and installation method

Abstract

The present invention relates to the field of planetary frame assembly, specifically a planetary frame sub-component installation structure and installation method, including a first sub-component, a second sub-component, a base and a plurality of limit blocks, the first sub-component includes a chassis and a plurality of side panels fixed on the chassis, the chassis is provided with a plurality of limit holes, the limit holes penetrate the chassis up and down, the side panels are fixed to the sides of the chassis and extend upward, the second sub-component includes a bottom plate, the bottom plate is provided with a plurality of through holes and a plurality of waist-shaped grooves, the base is provided with a plurality of columns, the number of the columns is the same as the number of the limit blocks, and the limit blocks are in the shape of a square with a cavity that penetrates up and down in the middle. The present invention separates and fixes the planetary frame sub-components by limit blocks, avoids machining a step surface on the first sub-component for axial limitation, and takes out the limit blocks after welding, and will not be left inside the planetary frame, and can be recycled, the limit blocks are easy to process, the cost is low and the processing accuracy can be guaranteed.

Description

Technical Field

[0001] The invention relates to the field of planetary carrier assembly, and in particular to a planetary carrier component mounting structure and a mounting method. Background Art

[0002] Since the planetary carrier is generally made of stamped sheet metal, which is stamped and machined, and the thickness of the sheet metal is relatively small, the limit step surface of the two brackets is very small. In order to ensure the accuracy of the two brackets after welding, the flatness and verticality of the positioning step surface are required to be high. However, because the step surface is very small, the point range is small when the three-coordinate measurement is performed, and the detection error is large. On the one hand, this problem cannot accurately guide production, and on the other hand, there may be batches of unqualified products that cannot be identified, affecting product performance.

[0003] For example, the Chinese invention patent with application number 201510149324.6, the patent name is a kind of axial limiting device and method for the planetary carrier of a rotary planetary gearbox, the limiting ring is installed in the groove processed on the left side of the upper tooth of the body, the inner teeth of the limiting ring are meshed with the outer teeth of the body, the body and the planetary carrier are meshed and assembled, the tooth thickness and the center line of the tooth groove of the limiting ring are aligned with the tooth thickness and the center line of the tooth groove of the body, the limiting ring and the planetary carrier are connected by bolts after being assembled; the planetary carrier is clamped in the middle of the groove on the fixed body through a limiting ring with inner teeth, the teeth of the limiting ring are installed in the groove along the tooth groove of the body, and then the inner teeth of the limiting ring rotate circumferentially relative to the outer teeth of the body. At an angle, the teeth of the limit ring are blocked by the external teeth of the body, and the limit ring and the low-speed planetary carrier are connected by bolts, thereby realizing the axial limitation of the low-speed planetary carrier; although the invention has the characteristics of adjustability, good floating stability, and good disassembly and assembly processability, it still needs screws for fixing. For planetary carriers with smaller thickness, the processing allowance for sinker processing is very small, and it is difficult to process a hole for accurate axial positioning. Even if the sinker is processed, the processing difficulty is great and the precision requirements are also high. It often requires more complicated processing technology and higher processing cost. At the same time, the measurement error is large, which can easily affect the product quality and make the axial clearance inaccurate. Summary of the invention

[0004] The present invention aims to provide a planetary carrier sub-component mounting structure and method, which separate and fix the planetary carrier sub-components by limiting blocks, thereby avoiding machining a step surface on the first sub-component for axial limiting. After welding, the limiting blocks are taken out and will not be left inside the planetary carrier, so they can be recycled. The limiting blocks are easy to machine, with low cost and guaranteed machining accuracy.

[0005] To achieve the above-mentioned purpose, the present invention adopts the following technical scheme: a planetary carrier sub-component installation structure, including a first sub-component, a second sub-component, a base and a plurality of limit blocks, the first sub-component includes a chassis and a plurality of side panels fixed on the chassis, the chassis is circular and is provided with a plurality of limit holes, the limit holes pass through the chassis up and down, the side panels are fixed to the sides of the chassis and extend upward, the second sub-component includes a bottom plate, the bottom plate is provided with a plurality of through holes and a plurality of waist-shaped grooves, the number of the waist-shaped grooves is the same as the number of the side panels, the number of the through holes is the same as the number of the limit blocks, the base is provided with a plurality of columns, the number of the columns is the same as the number of the limit blocks, and the limit blocks are square-shaped with a cavity passing through the middle up and down. A limiting block is set to realize the axial positioning of the first sub-component and the second sub-component, avoiding the need to machine a sink on the waist-shaped groove for axial limiting, reducing the difficulty of the processing technology and reducing the cost. At the same time, the waist-shaped groove corresponds to the arc-shaped side plate of the first sub-component, which is convenient for circumferential positioning of the second sub-component. The through holes and the limiting blocks are matched one by one, which is convenient for fixing the limiting blocks circumferentially and fixing them on the columns at the same time, so that the limiting blocks can be quickly installed.

[0006] Preferably, the number of the limit blocks is at least three, the columns are evenly distributed on the base, the limit holes are evenly distributed on the chassis, and the through holes are evenly distributed on the bottom plate. By providing a plurality of limit blocks, the circumferential positioning function is achieved, and the even distribution can avoid the turning moment, thereby making the axial positioning more stable.

[0007] Preferably, the size of the limiting hole is larger than the cross-sectional area of ​​the column, and the size of the through hole is also larger than the cross-sectional area of ​​the column, so that the column can pass through the limiting hole and the through hole well, thereby achieving the function of initial positioning.

[0008] Preferably, the upper end face and the lower end face of the limit block are parallel to each other and are both arranged perpendicular to the cavity in the limit block. The upper end face and the lower end face of the limit block are arranged parallel to each other, and the upper end face and the lower end face of the limit block are finely processed, so that the limit block can more accurately perform axial limit, determine the axial distance between the first sub-component and the second sub-component, and maintain the parallelism accuracy between the first sub-component and the second sub-component, thereby further improving the assembly accuracy.

[0009] Preferably, the number of the side panels is at least 3, the position of the waist-shaped groove corresponds to the position of the side panels one by one, and the size of the waist-shaped groove is larger than the cross-sectional area of ​​the side panels. By providing multiple side panels, the first sub-component as a whole can provide further circumferential positioning for the second sub-component, and at the same time, the center of mass of the first sub-component is located at the centroid, so that the first sub-component is fixed on the bottom plate more stably.

[0010] A method for installing the above-mentioned planetary carrier sub-component installation structure includes the following steps: a) fixing the lower end face of the first sub-component on the upper end face of the base, and sleeve the limiting hole of the first sub-component on the column of the base; b) sleeve the limiting block on the column of the base and make the bottom of the limiting block closely contact with the first sub-component, place the second sub-component on the limiting block and knock to confirm the pressing; c) weld the second sub-component with the first sub-component, remove the welded second sub-component and the first sub-component along the length direction of the column after welding, and remove the limiting block by knocking from the side. By setting the limiting block, the limiting block is fixed between the first sub-component and the second sub-component to play the role of axial limiting, avoiding machining a sink on the first sub-component and the second sub-component to limit the two sub-components, simplifying the processing technology, and reducing the cost. At the same time, because the limiting block only bears a small amount of static load during use, the finely machined surface used is less worn, so it can be easily taken out after welding, and can be reused in mass production, with a long service life, without affecting the positioning accuracy, while ensuring the processing accuracy, reducing the cost.

[0011] Preferably, the limit blocks in step b) are evenly distributed circumferentially on the first sub-component. The limit blocks are evenly distributed circumferentially on the first sub-component, so that the cross-sectional area of ​​the limit blocks can be made relatively small, and the force center of the second sub-component is located at the centroid, avoiding eccentric moment on the second sub-component or the first sub-component, thereby further ensuring the axial positioning accuracy, and also ensuring that the second sub-component will not be deformed by pressure.

[0012] Preferably, the through hole on the second sub-component in step b) is also sleeved on the column, and the waist-shaped groove of the second sub-component is sleeved on the side plate of the first sub-component. The second sub-component is initially positioned by the column, which facilitates the subsequent clamping of the waist-shaped groove on the second sub-component and the side plate of the first sub-component. The side plate on the first sub-component is arranged along the circumference of the first sub-component chassis, so the side plate of the first sub-component is an arc-shaped plate, and the waist-shaped groove is arranged to cooperate with the arc-shaped plate, which is convenient for clamping and further circumferentially limiting the second sub-component, so as to avoid relative rotation between the second sub-component and the first sub-component during welding.

[0013] Preferably, in step b), the lower end surface of the bottom plate of the second sub-component is in close contact with the upper end surface of the stop block, and the bottom plate of the second sub-component is kept horizontal. The end surface of the stop block is finely processed to ensure the flatness of the upper end surface of the stop block, and to ensure that the second sub-component and the stop block are closely fitted to ensure the parallelism of the second sub-component and the first sub-component, so that the assembly accuracy is further improved.

[0014] The advantages of the present invention are as follows: the planetary frame sub-components are separated and fixed by limit blocks, thereby avoiding machining a step surface on the first sub-component for axial limiting; the limit blocks are taken out after welding and will not remain inside the planetary frame, and can be recycled; the limit blocks are easy to machine, the cost is low, and the machining accuracy can be guaranteed. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 The present invention is a flow chart of the method for installing a planet carrier component.

[0016] Figure 2 It is a cross-sectional view of a planet carrier subassembly installation structure in the prior art.

[0017] Figure 3 It is a cross-sectional view of the planet carrier subassembly installation structure of the present invention.

[0018] Figure 4 It is an exploded view of the planet carrier sub-component installation structure of the present invention. DETAILED DESCRIPTION

[0019] The present invention will be further described below based on the accompanying drawings and specific embodiments.

[0020] Depend on Figure 2 and Figure 3 and Figure 4 As shown, a planetary carrier sub-component installation structure includes a first sub-component 2, a second sub-component 3, a base 1 and a plurality of limit blocks 4. The first sub-component 2 includes a chassis 21 and four side panels 23 fixed on the chassis 21. The chassis 21 is circular and is provided with four limit holes 22. The limit holes 22 pass through the chassis 21 up and down. The side panels 23 are fixed to the sides of the chassis 21 and extend upward. The second sub-component 3 includes a bottom plate 31. The bottom plate 31 is provided with four through holes 32 and four waist-shaped grooves 33. The base 1 is provided with four columns 11. The limit block 4 is a square block with a cavity 41 passing through it from top to bottom in the middle. The waist-shaped groove 33 corresponds to the arc-shaped side plate 23 of the first sub-component 2, which is convenient for circumferential positioning of the second sub-component 3. The through hole 32 and the limit block 4 correspond one by one, which is convenient for fixing the limit block 4 circumferentially and fixing it on the column 11, so that the limit block 4 can be quickly installed. The size of the limit hole 22 is larger than the cross-sectional area of ​​the column 11, and the size of the through hole 32 is also larger than the cross-sectional area of ​​the column 11. The column 11 can pass through the limit hole 22 and the through hole 32 well, thereby realizing the function of initial positioning. The upper end face and the lower end face of the limit block 4 are parallel to each other and are both perpendicular to the cavity 41 in the limit block 4. The upper end face and the lower end face of the limit block 4 are parallel to each other, and the upper end face and the lower end face of the limit block 4 are finely processed, so that the limit block 4 can more accurately perform axial limit, determine the axial distance between the first sub-component 2 and the second sub-component 3, and maintain the parallelism accuracy between the first sub-component 2 and the second sub-component 3, further improving the assembly accuracy.

[0021] Depend on Figure 1As shown, a method for installing a planetary carrier sub-component includes the following steps: a) fixing the lower end surface of the first sub-component 2 on the upper end surface of the base 1, and sleeve the limiting hole 22 of the first sub-component 2 on the column 11 of the base 1; b) sleeve the limiting block 4 on the column 11 of the base 1 and evenly arrange the limiting block 4 on the first sub-component 2 in the circumferential direction, so that the upper end surface of the chassis 21 of the first sub-component 2 is in close contact with the limiting block 4, and the through hole 32 on the second sub-component 3 is initially positioned through the column 11 and then placed on the limiting block 4 On the top, rotate the second sub-component 3 so that the waist-shaped groove 33 of the second sub-component 3 is mounted on the side plate 23 of the first sub-component 2, and knock to confirm that the second sub-component 3 is pressed tightly against the first sub-component 2, and the lower end surface of the bottom plate 31 of the second sub-component 3 is in close contact with the upper end surface of the limit block 4, and the bottom plate 31 of the second sub-component 3 remains horizontal; c) weld the second sub-component 3 to the first sub-component 2, and after welding, remove the welded second sub-component 3 and the first sub-component 2 along the length direction of the column 11, and remove the limit block 4 by knocking from the side.

[0022] Depend on Figure 2As shown, in the prior art, it is necessary to radially machine a sinker 5 on the through hole 32 of the second sub-component 3, and also machine a corresponding sinker 5 on the side plate 23, so that the first sub-component 2 and the second sub-component 3 can cooperate with the sinker 5 to achieve axial limitation, and the axial position accuracy is determined by the sinker 5. However, the thickness of the bottom plate 31 is limited, and it is difficult to machine the sinker 5 along the thickness direction of the bottom plate 31, and the accuracy is difficult to control. At the same time, the circumferential position of the waist-shaped groove 33 also needs to be accurately located, rather than simply being larger than the area of ​​the side plate 23. Therefore, the circumferential position also needs to be controlled, which further increases the difficulty of processing. In the present invention, the limit block 4 is provided and fixed between the first sub-component 2 and the second sub-component 3 to play the role of axial limit, so as to avoid machining the sink 5 on the first sub-component 2 and the second sub-component 3 to limit the two sub-components, simplify the processing technology, and reduce the cost. At the same time, because the limit block 4 only bears a small amount of static load during use, the finely machined surface used is less worn, so it can be easily taken out after welding is completed, and can be reused in batch production, with a long service life, and will not affect the positioning accuracy, thereby ensuring the processing accuracy and reducing the cost. The limit blocks 4 are evenly distributed circumferentially on the first sub-component 2, so that the cross-sectional area of ​​the limit blocks 4 can be made relatively small, and the force center of the second sub-component 3 is located at the centroid, so as to avoid causing eccentric torque to the second sub-component 3 or the first sub-component 2, thereby further ensuring the axial positioning accuracy, and at the same time, it can also ensure that the second sub-component 3 will not be deformed by pressure. The second sub-component 3 is initially positioned by the column 11, so that the waist-shaped groove 33 on the second sub-component 3 and the side plate 23 of the first sub-component 2 are subsequently clamped together. The side plate 23 on the first sub-component 2 is arranged along the circumference of the chassis 21 of the first sub-component 2. Therefore, the side plate 23 of the first sub-component 2 is an arc-shaped plate, and the waist-shaped groove 33 is arranged to cooperate with the arc-shaped plate, which is convenient for clamping and further circumferential limiting of the second sub-component 3 to avoid relative rotation between the second sub-component 3 and the first sub-component 2 during welding. The end face of the limit block 4 is finely processed to ensure the flatness of the upper end face of the limit block 4. Ensuring that the second sub-component 3 fits tightly with the limit block 4 can ensure the parallelism of the second sub-component 3 and the first sub-component 2, so that the assembly accuracy is further improved.

Claims

1. A method for installing a planet carrier subassembly installation structure, characterized in that: The planet carrier sub-component mounting structure comprises a first sub-component, a second sub-component, a base and a plurality of limit blocks, the first sub-component comprises a chassis and a plurality of side plates fixed on the chassis, the chassis is circular and is provided with a plurality of limit holes, the limit holes penetrate the chassis up and down, the side plates are fixed to the sides of the chassis and extend upward, the second sub-component comprises a bottom plate, the bottom plate is provided with a plurality of through holes and a plurality of waist-shaped grooves, the number of the waist-shaped grooves is the same as the number of the side plates, the number of the through holes is the same as the number of the limit blocks, the base is provided with a plurality of columns, the number of the columns is the same as the number of the limit blocks, and the limit blocks are in the shape of a square with a cavity penetrating up and down in the middle; The installation method comprises the following steps: a) fixing the lower end surface of the first sub-component on the upper end surface of the base, and sleeve the limiting hole of the first sub-component on the column of the base; b) sleeve the limiting block on the column of the base and make the bottom of the limiting block in close contact with the first sub-component, place the second sub-component on the limiting block and tap to confirm the pressing; c) weld the second sub-component and the first sub-component, remove the welded second sub-component and the first sub-component along the length direction of the column after welding, and remove the limiting block by tapping from the side.

2. The method for installing a planet carrier subassembly installation structure according to claim 1, characterized in that: The number of the limiting blocks is at least three, the uprights are evenly distributed on the base in the circumferential direction, the limiting holes are evenly distributed on the chassis in the circumferential direction, and the through holes are evenly distributed on the bottom plate in the circumferential direction.

3. The method for installing a planet carrier subassembly installation structure according to claim 2, characterized in that: The size of the limiting hole is larger than the cross-sectional area of ​​the column, and the size of the through hole is also larger than the cross-sectional area of ​​the column.

4. A method for installing a planet carrier sub-assembly installation structure according to claim 1, 2 or 3, characterized in that: The upper end surface and the lower end surface of the limiting block are parallel to each other and are both arranged perpendicularly to the cavity in the limiting block.

5. The method for installing a planet carrier sub-assembly installation structure according to claim 1, 2 or 3, characterized in that: The number of the side panels is at least 3, the positions of the waist-shaped grooves correspond to the positions of the side panels one by one, and the size of the waist-shaped grooves is larger than the cross-sectional area of ​​the side panels.

6. The method for installing a planet carrier subassembly installation structure according to claim 1, characterized in that: The limit blocks in step b) are evenly distributed circumferentially on the first sub-component.

7. The method for installing a planet carrier subassembly installation structure according to claim 6, characterized in that: The through hole on the second sub-component in step b) is also sleeved on the column, and the waist-shaped groove of the second sub-component is sleeved on the side plate of the first sub-component.

8. The method for installing a planet carrier subassembly installation structure according to claim 6 or 7, characterized in that: In the step b), the lower end surface of the bottom plate of the second sub-component is in close contact with the upper end surface of the limit block, and the bottom plate of the second sub-component remains horizontal.

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