An excavator platform slewing reduction device

Abstract

The present invention discloses a swing reduction device for an excavator platform, which relates to the field of mechanical technology. The present invention includes a cycloidal hydraulic motor, a swing base and an output gear. A chuck is fixed at the bottom of the cycloidal hydraulic motor. A swing base is arranged below the chuck. A bearing cylinder is fixed below the swing base. A clamping sleeve is fixedly sleeved in the middle of the inner wall of the bearing cylinder. A spline sleeve is sleeved in the clamping sleeve. An output gear is arranged below the swing base. By providing the cycloidal hydraulic motor, the swing base and the output gear, the present invention solves the problems that the existing swing reduction mechanism of the excavator platform is too high in height, resulting in too thick thickness of the installed excavator platform and inability to match multiple desired reduction output structures.

Description

Technical Field

[0001] The invention belongs to the field of mechanical technology, and in particular relates to an excavator platform rotation speed reduction device. Background Art

[0002] The rotary reducer is a full-circle rotary reduction transmission mechanism that integrates driving power. It uses the slewing bearing as the transmission follower and the mechanism attachment. By attaching the active part, drive and cover to one of the inner and outer circles of the slewing bearing, the other circle is used as both the transmission follower and the connection base of the driven working part. In this way, the slewing bearing itself is a full-circle rotary connection part, and the driving power and main transmission parts are efficiently configured to make it a universal reduction transmission mechanism that integrates rotation, reduction and driving functions while having a simple structure, easy manufacturing and maintenance. At present, there are two types of slewing reduction mechanisms used in excavator platforms. One is the slewing reduction mechanism with the plunger motor, and the other is the slewing reduction mechanism using the cycloid hydraulic motor as the platform slewing motor. However, it still has the following disadvantages in actual use:

[0003] 1. The existing excavator platform slewing reduction mechanism requires a high height for power transfer to the cycloid hydraulic motor. The reduction mechanism currently equipped with the cycloid hydraulic motor is high in height, and when installed in the excavator platform, the thickness of the excavator platform is too thick;

[0004] 2. The existing excavator platform rotary reduction mechanism can only be matched to one type of output structure, and cannot be matched to multiple types of reduction output structures.

[0005] Therefore, the existing excavator platform rotation speed reduction mechanism cannot meet the needs in actual use, so the market is in urgent need of improved technology to solve the above problems. Summary of the invention

[0006] The object of the present invention is to provide an excavator platform rotation reduction device, which solves the problem that the existing excavator platform rotation reduction mechanism is too high, resulting in the installed excavator platform being too thick and unable to match a variety of desired reduction output structures, by arranging a cycloid hydraulic motor, a slewing base and an output gear.

[0007] In order to solve the above technical problems, the present invention is achieved through the following technical solutions:

[0008] The present invention relates to a rotary deceleration device for an excavator platform, which includes a cycloidal hydraulic motor, a rotary base, and an output gear. A chuck is fixed to the bottom of the cycloidal hydraulic motor. A rotary base is provided below the chuck. A bearing cylinder is fixed below the rotary base. A clamping sleeve is fixedly sleeved in the middle of the inner wall of the bearing cylinder. A spline sleeve is sleeved in the clamping sleeve. An output gear is provided below the rotary base. The present invention generates the power to drive the output gear of the present invention through the cycloidal hydraulic motor, transmits the power generated by the cycloidal hydraulic motor to the output gear through the structure on the rotary base, and restricts the structure fixed on the output gear therein.

[0009] Further, a clamping seat is fixed to the top of the front side of the cycloidal hydraulic motor. Limit columns are fixed to the upper part of one side and the lower part of the other side of the front side of the clamping seat. A power gear is fixed to the output end of the cycloidal hydraulic motor. One end of the circumference of the power gear close to the cycloidal hydraulic motor is sleeved in the chuck. The cycloidal hydraulic motor is restricted at the corresponding position on the excavator through the clamping seat and limit columns fixed thereon, and the power generated on the cycloidal hydraulic motor is transmitted to the structure restricted on the rotary base through the power gear fixed on its output end.

[0010] A hydraulic valve is provided on the left or right side of the clamping seat. The hydraulic oil is supplied to the cycloidal hydraulic motor by adjusting the hydraulic valve to adjust the working state of the cycloidal hydraulic motor.

[0011] Further, the spline sleeve includes a mating sleeve, a double sleeve column, and a spline hole. The mating sleeve is fixedly sleeved in the middle of the circumference of the double sleeve column. The circumference of the mating sleeve is fixed in the middle of the inner wall of the bearing cylinder. A spline hole is formed through the top center of the double sleeve column and penetrates the double sleeve column. The bottom of the circumference of the power gear fixed to the output end of the cycloidal hydraulic motor is sleeved in the top of the inner part of the spline hole. The spline sleeve restricts the spline sleeve in the clamping sleeve fixed in the bearing cylinder through the mating sleeve thereon, and the power gear and the transmission gear are power-connected through the spline hole formed through the top center of the double sleeve column.

[0012] Further, an upper limit bearing is sleeved on the circumference of the double sleeve column at the top of the mating sleeve on the spline sleeve, and a lower limit bearing is sleeved on the circumference of the double sleeve column at the bottom of the mating sleeve on the spline sleeve. A first snap ring is sleeved on the bottom of the circumference of the upper limit bearing. The spline sleeve is rotationally connected to the bearing cylinder through the upper limit bearing and the lower limit bearing sleeved thereon.

[0013] Further, a connecting ring is fixedly sleeved on the bottom circumference of the bearing cylinder. A bottom cylinder is fixed to the bottom of the connecting ring. A socket bearing is sleeved on the inner bottom of the bottom cylinder. The bearing cylinder restricts the socket bearing in the bottom cylinder through the bottom cylinder fixed on the connecting ring fixed thereon, and restricts the gear shaft on the bearing cylinder through the socket bearing.

[0014] Further, a gear shaft is sleeved inside the socket bearing. A snap ring groove is formed on the circumferential side of the gear shaft at the top of the socket bearing. A second snap ring is sleeved in the snap ring groove. An output gear is fixed to the bottom of the gear shaft, and a transmission gear is fixed to the top of the gear shaft. The transmission gear is sleeved at the bottom of a spline hole penetrating through the top of a double sleeve column on a spline sleeve. The output gear connects and fixes the transmission gear and the output gear through the gear shaft fixed thereto. The power generated by the power gear is transmitted to the output gear through the transmission gear.

[0015] The present invention has the following beneficial effects:

[0016] 1. By providing a cycloidal hydraulic motor, a slewing base and an output gear, the present invention solves the problem that the height of the existing rotary reduction mechanism of an excavator platform is relatively high, resulting in an overly thick thickness of the installed excavator platform. Through the spline sleeve limited inside the slewing base, the power gear fixed to the output end of the cycloidal hydraulic motor is transmitted to the transmission gear fixed to the output gear and sleeved inside the spline sleeve. By changing the transmission method, the original clamping connection is changed to a socket transmission between the gear and the spline sleeve, which not only reduces the power loss ratio of the transmission, but also can adjust the height of the rotary reduction mechanism to be shorter, the structure is more compact, the used bearings are larger, and the thickness of the excavator platform can be reduced when installed in the excavator platform, increasing the service life of the slewing mechanism.

[0017] 2. By providing a slewing base and an output gear, the present invention solves the problem that the height of the existing rotary reduction mechanism of an excavator platform cannot match multiple desired reduction output structures. Through the transmission gear on the output gear sleeved by the spline sleeve on the slewing base, the output gear is driven to rotate under the drive of the cycloidal hydraulic motor. When facing different platforms, only the assembly formed by replacing the output gear and the structure fixed thereto is required. On the structures of different models corresponding to different output gears, the present invention can quickly change the structure when facing platforms with different models of output gears, greatly reducing the maintenance time of the present invention and increasing the adaptability of the present invention to multiple platforms.

[0018] Of course, it is not necessary for any product implementing the present invention to simultaneously achieve all the above-mentioned advantages. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for describing the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present invention, and those of ordinary skill in the art can also obtain other drawings based on these drawings without creative efforts.

[0020] Figure 1 It is a three-dimensional assembly structure diagram of the present invention;

[0021] Figure 2 This is the structural diagram of the cycloid hydraulic motor of the present invention;

[0022] Figure 3 This is the structural diagram of the slewing base of the present invention;

[0023] Figure 4 This is the present invention Figure 3 Internal sectional view structural diagram;

[0024] Figure 5 This is the structural diagram of the spline sleeve of the present invention;

[0025] Figure 6 This is the structural diagram of the output gear of the present invention.

[0026] In the attached drawings, the list of components represented by each reference numeral is as follows:

[0027] 100, cycloid hydraulic motor; 101, clamping seat; 102, limiting column; 103, chuck; 104, power gear; 105, hydraulic valve; 200, slewing base; 201, bearing cylinder; 202, connecting ring; 203, bottom cylinder; 204, spline sleeve; 2041, mating sleeve; 2042, double sleeve column; 2043, spline hole; 205, upper limiting bearing; 206, lower limiting bearing; 207, first circlip; 208, ferrule; 300, output gear; 301, gear shaft; 302, circlip groove; 303, transmission gear; 304, second circlip; 305, socket bearing. Detailed implementation manners

[0028] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention.

[0029] Please refer to Figures 1-6As shown in the figure, the present invention is a swing reduction device for an excavator platform, which includes a cycloidal hydraulic motor 100, a swing base 200, and an output gear 300. A chuck 103 is fixed at the bottom of the cycloidal hydraulic motor 100. The cycloidal hydraulic motor 100 generates the power to drive the movement of the present invention. The chuck 103 connects the swing base 200 and the cycloidal hydraulic motor 100 together. The swing base 200 is arranged below the chuck 103. The swing base 200 confines the structure for swing transmission within a bearing cylinder 201 fixed thereon, and connects the bearing cylinder 201 and the cycloidal hydraulic motor 100 together. The bearing cylinder 201 is fixed below the swing base 200. The bearing cylinder 201 confines the structure for transmitting the power on the cycloidal hydraulic motor 100 therein. A bushing 208 is sleeved and fixed in the middle of the inner wall of the bearing cylinder 201. The bushing 208 confines the spline sleeve 204 within the swing base 200. The spline sleeve 204 is sleeved in the bushing 208. The spline sleeve 204 sleevedly fixes the power gear 104 fixed at the output end of the cycloidal hydraulic motor 100 and the transmission gear 303 on the output gear 300. The output gear 300 is arranged below the swing base 200. The output gear 300 delivers the power generated by the cycloidal hydraulic motor 100 out of the present invention.

[0030] As shown in Figure 1 , Figure 2 As shown, a clamping seat 101 is fixed at the top of the front side of the cycloidal hydraulic motor 100. The clamping seat 101 fixes the limiting column 102 on the cycloidal hydraulic motor 100. The limiting column 102 is fixed at the upper part of one side and the lower part of the other side of the front side of the clamping seat 101. The limiting column 102 confines the cycloidal hydraulic motor 100 at the corresponding position on the excavator. A power gear 104 is fixed at the output end of the cycloidal hydraulic motor 100. The power gear 104 delivers the power generated by the cycloidal hydraulic motor 100 to the structure fixed on the swing base 200 and then to the output gear 300. One end of the power gear 104 near the cycloidal hydraulic motor 100 on the circumferential side is sleeved in the chuck 103. The power gear 104 delivers the power generated by the cycloidal hydraulic motor 100 into the structure confined by the swing base 200, driving the output gear 300 confined below the swing base 200 to rotate. The cycloidal hydraulic motor 100 confines the present invention on the platform of the excavator through the limiting column 102 fixed on the clamping seat 101 fixed thereon. The power generated by the cycloidal hydraulic motor 100 is delivered to the structure on the swing base 200 through the power gear 104 fixed at the output end of the cycloidal hydraulic motor 100. A hydraulic valve is arranged on the left or right side of the clamping seat 101. By adjusting this hydraulic valve to supply hydraulic oil to the cycloidal hydraulic motor, the working state of the cycloidal hydraulic motor is adjusted.

[0031] As shown in Figure 1 , Figure 5As shown, the spline sleeve 204 includes a matching sleeve 2041, a double sleeve column 2042 and a spline hole 2043. The matching sleeve 2041 is fixed in the middle of the circumference of the double sleeve column 2042. The circumference of the matching sleeve 2041 is fixed to the middle of the inner wall of the bearing cylinder 201. The matching sleeve 2041 fixes the spline sleeve 204 to the middle of the inner wall of the bearing cylinder 201. The top center of the double sleeve column 2042 is provided with a spline hole 2043, and the bottom of the circumference of the power gear 104 fixed at the output end of the cycloid hydraulic motor 100 is sleeved on At the top of the spline hole 2043, the double sleeve column 2042 connects and fixes the power gear 104 fixed at the output end of the cycloid hydraulic motor 100 and the transmission gear 303 on the output gear 300 through the spline hole 2043 opened on it. The spline sleeve 204 is fixed to the middle part of the inner wall of the bearing cylinder 201 through the matching sleeve 2041. The power gear 104 fixed at the output end of the cycloid hydraulic motor 100 and the transmission gear 303 on the output gear 300 are connected through the spline hole 2043 opened on the double sleeve column 2042.

[0032] Among them Figure 1 , Figure 3 , Figure 4 As shown, the double sleeve column 2042 on the top of the matching sleeve 2041 on the spline sleeve 204 is sleeved with an upper limiting bearing 205 on the circumferential side, and the upper limiting bearing 205 limits the top of the spline sleeve 204 above the inside of the sleeve 201. The double sleeve column 2042 on the bottom of the matching sleeve 2041 on the spline sleeve 204 is sleeved with a lower limiting bearing 206 on the circumferential side, and the lower limiting bearing 206 limits the bottom of the spline sleeve 204 below the inside of the sleeve 201. A first retaining spring 207 is sleeved on the bottom, and the first retaining spring 207 clamps the upper limiting bearing 205 on the spline sleeve 204 to prevent axial movement of the upper limiting bearing 205. The upper limiting bearing 205 and the lower limiting bearing 206 have the same diameter. The spline sleeve 204 cooperates with the upper limiting bearing 205 and the lower limiting bearing 206 sleeved on its circumferential side to limit the spline sleeve 204 in the bearing sleeve 201, and the upper limiting bearing 205 is prevented from axial movement by the first retaining spring 207.

[0033] Among them Figure 1 , 3As shown in FIGS. 5, a connecting ring 202 is sleeved and fixed at the bottom of the circumferential side of the bearing cylinder 201. The connecting ring 202 connects the bearing cylinder 201 and the bottom cylinder 203 together. The bottom of the connecting ring 202 is fixed with the bottom cylinder 203. The socket bearing 305 is sleeved inside the bottom cylinder 203, restricting the output gear 300 and the structures thereon to the structure fixed on the rotary base 200. The inner bottom of the bottom cylinder 203 is sleeved with the socket bearing 305, and the socket bearing 305 restricts the output gear 300 and the structures thereon to the gear shaft 301. The bearing cylinder 201 restricts the structures on the output gear 300 within the bearing cylinder 201 through the bottom cylinder 203 fixed on the connecting ring 202 fixed thereon, and restricts the output gear 300 and the structures thereon to the gear shaft 301 through the socket bearing 305.

[0034] As shown in Figure 1 , 6 , the socket bearing 305 has the gear shaft 301 sleeved inside it, and the gear shaft 301 sleeves the socket bearing 305 thereon, connecting the output gear 300 and the transmission gear 303 together. A snap ring groove 302 is formed on the circumferential side of the gear shaft 301 at the top of the socket bearing 305. The snap ring groove 302 sleeves the second snap ring 304 on the gear shaft 301. The second snap ring 304 is sleeved in the snap ring groove 302, and the second snap ring 304 restricts the output gear 300 and the structures thereon to the socket bearing 305 fixed on the bearing cylinder 201 through the connecting ring 202. The bottom of the gear shaft 301 is fixed with the output gear 300, and the output gear 300 delivers the power generated by the cycloidal hydraulic motor 100 out of the present invention. The top of the gear shaft 301 is fixed with the transmission gear 303, and the transmission gear 303 transmits the power generated by the cycloidal hydraulic motor 100 delivered by the power gear 104 to the gear shaft 301. The transmission gear 303 is sleeved at the bottom of the spline hole 2043 penetrating through the top of the double sleeve column 2042 on the spline sleeve 204. The diameter of the socket bearing 305 is smaller than the diameter of the upper limit bearing 205. The socket bearing 305 restricts the output gear 300 and the structures thereon to be sleeved on the gear shaft 301 at one end of the inner bottom of the bottom cylinder 203. The output gear 300 is sleeved inside the spline sleeve 204 through the transmission gear 303 fixed on the gear shaft 301, and delivers the power generated by the cycloidal hydraulic motor 100 out of the present invention.

[0035] The above are only the preferred embodiments of the present invention and do not limit the present invention. Any modification to the technical solutions recorded in the foregoing embodiments, any equivalent replacement of some technical features, and any modification, equivalent replacement, and improvement made all fall within the protection scope of the present invention.

Claims

1. An excavator platform slewing reduction device, comprising a cycloidal hydraulic motor (100), a slewing base (200) and an output gear (300), Characterized in that: A chuck (103) is fixed to the bottom of the cycloidal hydraulic motor (100), a slewing base (200) is arranged below the chuck (103), a bearing cylinder (201) is fixed to the bottom of the slewing base (200), a clamping sleeve (208) is fixedly sleeved in the middle of the inner wall of the bearing cylinder (201), a spline sleeve (204) is sleeved in the clamping sleeve (208), and an output gear (300) is arranged below the slewing base (200); The spline sleeve (204) includes a mating sleeve (2041), a double sleeve column (2042) and a spline hole (2043). The mating sleeve (2041) is fixedly sleeved in the middle of the circumferential side of the double sleeve column (2042). The circumferential side of the mating sleeve (2041) is fixed to the middle of the inner wall of the bearing cylinder (201). A spline hole (2043) is formed through the double sleeve column (2042) at the top center of the double sleeve column (2042). The bottom of the circumferential side of the power gear (104) fixed to the output end of the cycloidal hydraulic motor (100) is sleeved inside the top of the spline hole (2043). An upper limiting bearing (205) is sleeved on the circumferential side of the double sleeve column (2042) at the top of the mating sleeve (2041) on the spline sleeve (204), and a lower limiting bearing (206) is sleeved on the circumferential side of the double sleeve column (2042) at the bottom of the mating sleeve (2041) on the spline sleeve (204). A first snap ring (207) is sleeved on the bottom of the circumferential side of the upper limiting bearing (205); A connecting ring (202) is fixedly sleeved on the bottom circumferential side of the bearing cylinder (201), a bottom cylinder (203) is fixed to the bottom of the connecting ring (202), a socket bearing (305) is sleeved on the inner bottom of the bottom cylinder (203), and the diameter of the socket bearing (305) is smaller than the diameter of the upper limiting bearing (205). A gear shaft (301) is sleeved inside the socket bearing (305). A snap ring groove (302) is formed on the circumferential side of the gear shaft (301) at the top of the socket bearing (305). A second snap ring (304) is sleeved in the snap ring groove (302). The output gear (300) is fixed to the bottom of the gear shaft (301), a transmission gear (303) is fixed to the top of the gear shaft (301), and the transmission gear (303) is sleeved on the bottom of the spline hole (2043) formed through the top of the double sleeve column (2042).

2. The excavator platform slewing reduction device according to claim 1, Characterized in that, A clamping seat (101) is fixed to the top of the front side of the cycloidal hydraulic motor (100). Limit columns (102) are fixed to the upper part and the lower part on one side of the front side of the clamping seat (101). A power gear (104) is fixed to the output end of the cycloidal hydraulic motor (100), and one end of the circumferential side of the power gear (104) close to the cycloidal hydraulic motor (100) is sleeved inside the chuck (103).

3. A rotary deceleration device for an excavator platform according to claim 2, characterized in that, a hydraulic valve (105) is provided on the left or right side of the clamping seat (101).

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