Assembly tool for planet carrier assembly

Abstract

The object of the present invention is to provide an assembly tool for a planetary carrier assembly that can realize assembly between axles, needle rollers and planetary gears. An assembly tool for a planetary carrier assembly includes a pressing block assembly and a retaining assembly, wherein the retaining assembly includes an inner ring and an outer ring that are independent of each other, wherein the inner ring and the outer ring both have a center hole, wherein the outer ring is sleeved on the circumferential outer side of the inner ring, and the axial lengths of the outer ring and the inner ring are both smaller than the axial lengths of the needle rollers to be press-fitted, wherein the press-fitting assembly includes a fixing block, wherein the fixing block has an inner cavity that opens downward, wherein a positioning column is provided in the inner cavity, wherein the lower end of the positioning column passes through the inner cavity to extend to the lower side of the fixing block, wherein the lower end of the positioning column can extend into the center hole of the inner ring, wherein a pressing block is fixed at the lower end of the fixing block, wherein the pressing block has a through groove that passes through the upper and lower parts for the lower end of the positioning column to pass through, wherein the outer diameter of the pressing block is smaller than the inner diameter of the outer ring, and the inner diameter of the pressing block is larger than the outer diameter of the inner ring.

Description

Technical Field

[0001] The invention relates to an assembly tool for a planetary carrier assembly. Background Art

[0002] The planetary carrier assembly includes a planetary carrier plate, axles and planetary gears. In order to reduce the friction between the axles and the planetary gears, several needle rollers can be pressed between the outer wall of the axle and the center hole of the planetary gears. However, the needle rollers are too thin and there are too many of them. If workers press the needle rollers one by one, the efficiency will be low. Summary of the invention

[0003] The object of the present invention is to provide an assembly tool for a planetary carrier assembly which can press a plurality of roller needles between the outer wall of the wheel shaft and the center hole of the planetary gear to realize the assembly of the wheel shaft and the planetary gear.

[0004] To achieve the above-mentioned purpose, the present invention adopts the following technical scheme: an assembly tool for a planetary carrier assembly, including a pressing block assembly and a retaining assembly, the retaining assembly including an inner ring and an outer ring independent of each other, the inner ring and the outer ring both having a center hole, the outer ring is sleeved on the circumferential outside of the inner ring, and the axial lengths of the outer ring and the inner ring are both smaller than the axial length of the needle roller to be press-fitted, the press-fitting assembly includes a fixing block, the fixing block has an inner cavity opening downward, a positioning column is provided in the inner cavity, the lower end of the positioning column passes through the inner cavity to extend to the lower side of the fixing block, the lower end of the positioning column can extend into the center hole of the inner ring, a pressing block is fixed to the lower end of the fixing block, the pressing block has a through groove penetrating up and down for the lower end of the positioning column to pass through, the outer diameter of the pressing block is smaller than the inner diameter of the outer ring, and the inner diameter of the pressing block is larger than the outer diameter of the inner ring.

[0005] Since the inner ring and the outer ring are two independent parts, the inner ring and the outer ring can be made of materials such as plastics and plastics that have a certain strength but can be deformed to a certain extent, so as to facilitate the fixation of the needle rollers between the inner ring and the outer ring. When the tooling of the present invention is used, a number of needle rollers are inserted between the inner ring and the outer ring. Since the needle rollers are longer than the inner ring and the outer ring, one end of the needle rollers will be located outside the retaining assembly, and then the end of the needle roller located outside the retaining assembly is placed between the axle and the planetary gear. Since the end of the needle roller has a fillet or a taper, the end of the needle roller can extend between the axle and the planetary gear, and then the pressing block assembly is moved downward to allow the positioning column to extend into the center hole of the inner ring, and the lower end face of the pressing block is in contact with the top of the needle roller. Then the pressing block assembly is moved to realize the press-fitting of the needle rollers, so as to achieve the fixation of the axle, needle rollers and planetary gears. The present invention can be used for the assembly of axles, needle rollers and planetary gears, and can also reduce the labor intensity of workers.

[0006] Preferably, a compression spring is provided in the inner cavity of the fixing block, and the upper end of the positioning column abuts against the lower end of the compression spring.

[0007] Preferably, the upper end of the positioning column extends outwardly to form a limiting protrusion, the outer diameter of which is larger than the inner diameter of the pressing block, or the outer diameter of which is larger than the inner diameter of the lower opening of the inner cavity. The above arrangement prevents the positioning column from being separated from the fixing block.

[0008] Preferably, the lower end surface of the fixing block is concave upward to form a fixing groove, and the upper end of the pressing block is fixed in the fixing groove. The above arrangement allows the pressing block to be replaced. The pressing block can be fixed to the fixing block by various means such as thread fixing, glue fixing, fastener fixing, etc.

[0009] Preferably, the positioning column includes at least one positioning column section and two positioning column sections from bottom to top, the circumferential outer edge of the second positioning column section is located outside the circumferential outer edge of the first positioning column section to form a step structure, when the second positioning column section is supported on the upper side of the upper end surface of the inner ring, the first positioning column section is located in the center hole of the inner ring, and the lower end surface of the positioning column is located above the upper end surface of the wheel shaft of the planetary carrier assembly. The above arrangement prevents the tooling of the present invention from contacting the wheel shaft and pressing the wheel shaft out of the planetary carrier plate.

[0010] The invention has the advantages of being able to realize the assembly of the wheel shaft, the needle roller and the planetary gear and being able to reduce the labor intensity of workers. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 A structural schematic diagram of the present invention;

[0012] Figure 2 It is a structural schematic diagram of the matching of the needle roller and the retaining assembly of the present invention. DETAILED DESCRIPTION

[0013] The present invention will be further described below based on the accompanying drawings and specific embodiments.

[0014] Depend on Figure 1 , Figure 2 As shown, an assembly tool for a planetary carrier assembly of the present invention includes a pressing block assembly 10 and a retaining assembly 20. The retaining assembly 10 includes an inner ring 1 and an outer ring 2 that are independent of each other. The inner ring 1 and the outer ring 2 both have a center hole. The outer ring 2 is sleeved on the circumferential outside of the inner ring 1, and the axial lengths of the outer ring 2 and the inner ring 1 are both smaller than the axial length of the needle roller 3 to be press-fitted. The press-fitting assembly 20 includes a fixing block 4. The fixing block 4 has an inner cavity 41 that opens downward. A positioning column 5 is provided in the inner cavity 41. The lower end of the positioning column 5 passes through the inner cavity to extend to the lower side of the fixing block 4. The lower end of the positioning column 5 can extend into the center hole of the inner ring 1. A pressing block 6 is fixed to the lower end of the fixing block 4. The pressing block 6 has a through groove that passes through from top to bottom for the lower end of the positioning column 5 to pass through. The outer diameter of the pressing block 6 is smaller than the inner diameter of the outer ring 2, and the inner diameter of the pressing block 6 is larger than the outer diameter of the inner ring 1.

[0015] The inner cavity 41 of the fixing block 4 is provided with a compression spring 7, and the upper end of the positioning column 5 abuts against the lower end of the compression spring 7. The upper end of the positioning column 5 extends outward to form a limiting protrusion 51, and the outer diameter of the limiting protrusion 51 is larger than the inner diameter of the pressing block 6.

[0016] The lower end surface of the fixing block 4 is concave upward to form a fixing groove, and the upper end of the pressing block 4 is threadedly fixed in the fixing groove.

[0017] Among them, the positioning column 5 includes at least a first positioning column section 52 and a second positioning column section 53 from bottom to top. The circumferential outer edge of the second positioning column section 53 is located outside the circumferential outer edge of the first positioning column section 51 to form a step structure. When the second positioning column section 53 is supported on the upper side of the upper end surface of the inner ring 1, the first positioning column section 52 is located in the center hole of the inner ring 1, and the lower end surface of the positioning column 5 is located above the upper end surface of the wheel axle 8 of the planetary carrier assembly.

[0018] When the tooling of the present invention is used, a number of needle rollers 3 are inserted between the inner ring 1 and the outer ring 2. Since the needle rollers 3 are longer than the inner ring 1 and the outer ring 2, one end of the needle rollers 3 will be located outside the retaining assembly 10. Then, the end of the needle rollers 3 located outside the retaining assembly 10 is placed between the axle 8 and the planetary gear 9. Since the end of the needle rollers 3 has a fillet or taper, the end of the needle rollers 3 can be inserted between the axle 8 and the planetary gear 9. Then, the pressing block assembly 20 is moved downward to allow the positioning column 5 to extend into the center hole of the inner ring 1, and the lower end surface of the pressing block 6 is in contact with the top of the needle rollers 3. Then, the pressing block assembly 20 is moved to press the needle rollers 3, so as to achieve the assembly and fixation of the axle 8, the needle rollers 3 and the planetary gear 9. Among them, the fixing block of the pressing block assembly can be fixed to the output end of the press, or the pressing block assembly can be pressed down by a worker manually.

[0019] The invention can be used for assembling axles, needle rollers and planetary gears, and can also reduce the labor intensity of workers.

Claims

1. An assembly tool for a planetary carrier assembly, characterized in that The invention comprises a pressing block assembly and a retaining assembly, wherein the retaining assembly comprises an inner ring and an outer ring which are independent of each other, the inner ring and the outer ring both having a center hole, the outer ring being sleeved on the circumferential outer side of the inner ring, and the axial lengths of the outer ring and the inner ring being smaller than the axial length of the needle roller to be press-fitted, the pressing block assembly comprises a fixing block, the fixing block having an inner cavity opening downward, a positioning column being arranged in the inner cavity, the lower end of the positioning column passing through the inner cavity to extend to the lower side of the fixing block, the lower end of the positioning column being able to extend into the center hole of the inner ring, a pressing block being fixed at the lower end of the fixing block, the pressing block having a through groove penetrating from top to bottom for the lower end of the positioning column to pass through, the outer diameter of the pressing block being smaller than the inner diameter of the outer ring, and the inner diameter of the pressing block being larger than the outer diameter of the inner ring; a compression spring is arranged in the inner cavity of the fixing block, and the upper end of the positioning column abuts against the lower end of the compression spring; The upper end of the positioning column extends outward in the circumferential direction to form a limiting protrusion, the outer diameter of the limiting protrusion is larger than the inner diameter of the pressing block, or the outer diameter of the limiting protrusion is larger than the inner diameter of the lower end opening of the inner cavity; The lower end surface of the fixing block is concave upward to form a fixing groove, and the upper end of the pressing block is fixed in the fixing groove; The positioning column includes at least one positioning column section and two positioning column sections from bottom to top. The circumferential outer edge of the second positioning column section is located outside the circumferential outer edge of the first positioning column section to form a step structure. When the second positioning column section is supported on the upper side of the upper end surface of the inner ring, the first positioning column section is located in the center hole of the inner ring, and the lower end surface of the positioning column is located above the upper end surface of the wheel axle of the planetary carrier assembly.

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