Planet carrier limiting structure of multi-stage planetary transmission device

Abstract

The utility model provides a planet carrier limiting structure of a multi-stage planetary transmission device, which comprises a gear box body, a motor output shaft and a gear box output shaft are arranged in the gear box body, and the motor output shaft is connected with the gear box output shaft through a planet carrier; a concentric structure; the concentric structure comprises a close-fitting opening formed in the planet carrier, a first loose-fitting opening is formed in the side wall, close to the planet carrier, of the output shaft of the motor, a second loose-fitting opening is formed in the side wall, close to the planet carrier, of the output shaft of the gearbox, and the close-fitting opening is concentrically matched with the first loose-fitting opening and the second loose-fitting opening. And a fixing rod is arranged in the close-fitting opening, the first loose-fitting opening and the second loose-fitting opening. According to the utility model, the stable operation of concentric rotation can be ensured, the radial vibration problem is avoided, and the operation noise is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of multi-stage planetary transmission devices, in particular to a planet carrier limiting structure of a multi-stage planetary transmission device. Background Art

[0002] The multi-stage planetary transmission is a widely used reduction mechanism that can transmit the power of the input shaft to the output shaft through the gear transmission on the planetary carrier to complete multi-stage transmission.

[0003] The disadvantage of the above-mentioned prior art is that, in a multi-stage planetary transmission device, the radial position of the planet carrier that is not connected to the output and input shafts is fixed only by gear meshing, and its concentricity cannot be guaranteed, the stability is poor, and the operating noise is large. Utility Model Content

[0004] In view of the deficiencies in the prior art, the utility model provides a planet carrier limiting structure of a multi-stage planetary transmission device.

[0005] The embodiment of the utility model provides a planet carrier limiting structure of a multi-stage planetary transmission device, comprising:

[0006] A gear box body, wherein a motor output shaft and a gear box output shaft are arranged in the gear box body, and the motor output shaft and the gear box output shaft are connected via a planet carrier;

[0007] Concentric structure; the concentric structure includes a tight-fitting opening arranged on the planetary carrier, a first loose-fitting opening is arranged on a side wall of the motor output shaft close to the planetary carrier, and a second loose-fitting opening is arranged on a side wall of the gear box output shaft close to the planetary carrier. The tight-fitting opening is concentrically matched with the first loose-fitting opening and the second loose-fitting opening, and a fixing rod is commonly arranged in the tight-fitting opening, the first loose-fitting opening and the second loose-fitting opening.

[0008] Furthermore, both ends of the fixing rod are provided with a plurality of spherical grooves arranged at equal intervals, and rolling balls are provided in the plurality of spherical grooves.

[0009] Further, the fixing rod is tightly matched with the planet carrier, the fixing rod is loosely matched with the motor output shaft, and the fixing rod is loosely matched with the gear box output shaft.

[0010] Furthermore, the fixing rod is a spindle cylinder.

[0011] Furthermore, a protective coating is provided on the outer wall of the fixing rod.

[0012] Compared with the prior art, the utility model has the following beneficial effects:

[0013] The utility model uses the setting of the fixing rod to make the planet carrier only rotate during operation and cannot vibrate radially, so that the motor output shaft and the gear box output shaft are always kept concentric, effectively reducing the operating noise of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a structural cross-sectional view of a planet carrier limiting structure of a multi-stage planetary transmission device described in an embodiment of the utility model.

[0015] Figure 2 It is a front cross-sectional view of a planet carrier limiting structure of a multi-stage planetary transmission device described in an embodiment of the utility model.

[0016] Figure 3 It is a structural diagram of the spherical groove part of the planet carrier limiting structure of a multi-stage planetary transmission device described in an embodiment of the utility model.

[0017] In the above drawings: 1 gear box body, 2 motor output shaft, 3 gear box output shaft, 4 planet carrier, 5 tight fitting opening, 6 first loose fitting opening, 7 second loose fitting opening, 8 fixing rod, 9 spherical groove, 10 rolling ball. DETAILED DESCRIPTION

[0018] The technical solution of the present utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0019] like Figure 1-Figure 3 As shown, the embodiment of the utility model proposes a planet carrier limiting structure of a multi-stage planetary transmission device, including:

[0020] A gear box body 1, wherein a motor output shaft 2 and a gear box output shaft 3 are arranged in the gear box body 1, and the motor output shaft 2 and the gear box output shaft 3 are connected via a planet carrier 4;

[0021] Concentric structure; the concentric structure includes a tight-fitting opening 5 arranged on the planet carrier 4, a first loose-fitting opening 6 is arranged on a side wall of the motor output shaft 2 close to the planet carrier 4, and a second loose-fitting opening 7 is arranged on a side wall of the gearbox output shaft 3 close to the planet carrier 4. The tight-fitting opening 5 is concentrically matched with the first loose-fitting opening 6 and the second loose-fitting opening 7. A fixing rod 8 is arranged in the tight-fitting opening 5, the first loose-fitting opening 6 and the second loose-fitting opening 7. A protective coating is arranged on the outer wall of the fixing rod 8. The protective coating makes the fixing rod 8 safer and longer-lasting. The fixing rod 8 and the planet carrier 4 is tightly matched, the fixing rod 8 is loosely matched with the motor output shaft 2, and the fixing rod 8 is loosely matched with the gearbox output shaft 3. This matching setting makes the concentric rotation work more stable. The fixing rod 8 is a spindle cylinder. The spindle cylinder is in a state of being thick in the center and thin at both ends, which can better cooperate with the tight-fitting mouth 5 to complete the connection. Both ends of the fixing rod 8 are provided with a plurality of spherical grooves 9 arranged at equal intervals, and rolling balls 10 are arranged in the plurality of spherical grooves 9. The rolling of the rolling balls 10 makes the rotation smoother, thereby making the concentric rotation more stable and less noisy.

[0022] The detailed working process of the utility model is as follows:

[0023] The fixing rod 8 can be tightly fitted with the planetary carrier 4 through the tight fitting opening 5, and at the same time, the fixing rod 8 is effectively restricted through the loose fitting between the fixing rod 8 and the first loose fitting opening 6 and the second loose fitting opening 7, so that the planetary carrier 4 can only rotate concentrically relative to the motor output shaft 2 and the gear box output shaft 3, and then the motor output shaft 2, the gear box output shaft 3 and the planetary carrier 4 can maintain concentric operation and rotation, avoiding radial vibration, ensuring the stability of the device operation, and reducing the operating noise of the device. The setting of the rolling ball 10 makes the relative rotation smoother and more stable, the concentric rotation work is better completed, and the operating noise is further reduced.

[0024] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model rather than to limit it. Although the utility model has been described in detail with reference to the preferred embodiments, ordinary technicians in the field should understand that the technical solution of the utility model can be modified or replaced by equivalents without departing from the purpose and scope of the technical solution of the utility model, which should be included in the scope of the claims of the utility model.

Claims

1. A planet carrier limiting structure of a multi-stage planetary transmission device, characterized in that: include: A gear box body (1), wherein a motor output shaft (2) and a gear box output shaft (3) are arranged inside the gear box body (1), and the motor output shaft (2) and the gear box output shaft (3) are connected via a planet carrier (4); A concentric structure; the concentric structure comprises a tight-fitting opening (5) arranged on a planetary carrier (4); a first loose-fitting opening (6) is arranged on a side wall of the motor output shaft (2) close to the planetary carrier (4); a second loose-fitting opening (7) is arranged on a side wall of the gearbox output shaft (3) close to the planetary carrier (4); the tight-fitting opening (5) is concentrically matched with the first loose-fitting opening (6) and the second loose-fitting opening (7); and a fixing rod (8) is commonly arranged in the tight-fitting opening (5), the first loose-fitting opening (6) and the second loose-fitting opening (7).

2. The planet carrier limiting structure of a multi-stage planetary transmission device according to claim 1, characterized in that: in: Both ends of the fixing rod (8) are provided with a plurality of spherical grooves (9) arranged at equal intervals, and rolling balls (10) are arranged in the plurality of spherical grooves (9).

3. The planet carrier limiting structure of a multi-stage planetary transmission device according to claim 1, characterized in that: in: The fixing rod (8) is tightly matched with the planet carrier (4), the fixing rod (8) is loosely matched with the motor output shaft (2), and the fixing rod (8) is loosely matched with the gear box output shaft (3).

4. The planet carrier limiting structure of a multi-stage planetary transmission device according to claim 1, characterized in that: in: The fixing rod (8) is a spindle cylinder.

5. The planet carrier limiting structure of a multi-stage planetary transmission device according to claim 2, characterized in that: in: A protective coating is provided on the outer wall of the fixing rod (8).

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