Hedge trimmer cutter driving device

Abstract

The utility model discloses a cutter driving device of a hedge trimmer. The cutter driving device is mainly composed of a double-row ball bearing, a retainer ring for a hole, a fixing seat, a planetary gear support, an inner gear ring, a single-row ball bearing, a planetary rotating seat, a needle bearing, a positioning retainer ring, a driving pin shaft, a retainer ring, a positioning pin shaft, a planetary gear shaft, a needle bearing without an inner ring, a flat key, a retainer ring for a shaft and a hydraulic motor. The planetary gear mechanism is adopted to convert rotary motion of the hydraulic motor into linear transmission of the driving pin shaft, the structure is compact, vibration is small, transmission is stable and reliable, and therefore the cutter is free of external force in the vertical direction, and the service life of the cutter is greatly prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of forestry equipment, in particular to a cutter driving device of a hedge trimmer. Background Art

[0002] The cutter drive device of the hedge trimmer generally adopts a crank-connecting rod mechanism to convert rotary motion into linear motion. During the movement, the connecting rod pushes and pulls the cutter bar to generate a downward (upward) component of force on it, causing the cutter to wear quickly and affecting the life of the cutter. Utility Model Content

[0003] The utility model aims to provide a cutter driving device for a hedge trimmer in view of the defects and shortcomings of the prior art.

[0004] To achieve the above-mentioned purpose, the technical solution adopted by the utility model is: a hedge trimmer cutter drive device, including a hydraulic motor and a fixed seat, which are fixed by bolts, and its innovation lies in: a first double-row ball bearing is installed on the upper part of the inner hole of the fixed seat, a first hole retaining ring is installed on the lower part of the first double-row ball bearing, an inner gear ring is fixed in the middle part with a hexagon socket screw, and a single-row ball bearing is installed in the lower part; a planetary gear bracket is arranged in the fixed seat, the output shaft of the hydraulic motor is transmission-connected to the planetary gear bracket through a flat key, the outer upper end of the planetary gear bracket cooperates with the inner hole of the first double-row ball bearing, a shaft retaining ring is installed on the upper side of the first double-row ball bearing, and the outer side of the lower middle part is sleeved on the inner side of the single-row ball bearing and is compatible with the inner hole of the single-row ball bearing. The planetary gear bracket has an inner hole, and a needle bearing without an inner ring is installed on the upper part of the inner hole, and a second double-row ball bearing is installed on the lower part, and a second hole retaining ring is installed on the lower part of the second double-row ball bearing; a planetary gear shaft is arranged in the inner hole of the planetary gear bracket, the outer diameter of the upper shaft of the planetary gear shaft matches the inner hole of the needle bearing without an inner ring, the middle part is a gear, the outer diameter of the lower shaft matches the inner hole of the second double-row ball bearing, and the lower end is connected to the planetary rotating seat by setting a positioning pin and a connecting screw, and the gear on the planetary gear shaft is meshed with the inner gear ring; the planetary rotating seat is connected to the driving pin shaft by bolt connection, an arc groove is provided inside the driving pin shaft, a retaining ring and a needle bearing are installed in the middle of the driving pin shaft, and the positioning retaining ring is fixed by screws at the end.

[0005] Furthermore, the power source of the hydraulic motor comes from the hydraulic output of the excavator or loader.

[0006] Furthermore, a butter cup is installed in the middle part of the outer side of the fixing seat and in the arc groove of the driving pin shaft.

[0007] After adopting the above structure, the utility model has the following beneficial effects:

[0008] 1. The utility model adopts a planetary gear mechanism to convert the rotary motion of the hydraulic motor into a linear drive of the drive pin shaft, which has a compact structure, small vibration, and stable and reliable transmission. Therefore, there is no external force acting in the vertical direction of the cutter, which greatly improves the service life of the cutter;

[0009] 2. The utility model utilizes the hydraulic output of the existing excavator or loader to drive the hydraulic motor, thereby reducing the machine purchase cost and equipment maintenance cost;

[0010] 3. The utility model can be matched with various types of hedge trimmer cutters and is easy to install. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a schematic diagram of the external structure of the utility model;

[0012] Figure 2 for Figure 1 Sectional view of AA in the middle;

[0013] Figure 3 This is a schematic diagram of the structure of the planetary gear support in the utility model;

[0014] Figure 4 It is a schematic diagram of the structure of the driving pin in the utility model.

[0015] Description of reference numerals:

[0016] 1 hydraulic motor, 2 fixed seat, 3 first double row ball bearing, 4 retaining ring for first hole, 5 inner ring, 6 single row ball bearing, 7 planetary gear bracket, 8 flat key, 9 retaining ring for shaft, 10 needle roller bearing without inner ring, 11 second double row ball bearing, 12 retaining ring for second hole, 13 planetary gear shaft, 14 connecting screw, 15 positioning pin, 16 planetary rotating seat, 17 driving pin, 18 retaining ring, 19 needle roller bearing, 20 positioning retaining ring, 21 grease cup. DETAILED DESCRIPTION

[0017] The utility model is further described below in conjunction with the accompanying drawings.

[0018] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings and specific implementation methods. It should be understood that the specific implementation methods described here are only used to explain the utility model and are not used to limit the utility model.

[0019] See also Figure 1-4A drive device for a hedge trimmer cutter comprises a hydraulic motor 1 and a fixing seat 2, which are fixed by bolts. A first double-row ball bearing 3 is installed on the upper part of the inner hole of the fixing seat 2, a first hole retaining ring 4 is installed on the lower part of the first double-row ball bearing 3, an inner gear ring 5 is fixed in the middle part by a hexagon socket screw, and a single-row ball bearing 6 is installed in the lower part; a planetary gear bracket 7 is arranged in the fixing seat 2, an output shaft of the hydraulic motor 1 is connected to the planetary gear bracket 7 by a flat key 8, an upper end of the outer side of the planetary gear bracket 7 is matched with the inner hole of the first double-row ball bearing 3, a shaft retaining ring 9 is installed on the upper side of the first double-row ball bearing 3, an outer side of the middle and lower part is sleeved on the inner side of the single-row ball bearing 6, and matched with the inner hole of the single-row ball bearing 6, the planetary gear bracket 7 has an inner hole, and a non-inner gear is installed on the upper part of the inner hole The planetary gear shaft 13 is arranged in the inner hole of the planetary gear bracket 7, the outer diameter of the upper shaft of the planetary gear shaft 13 matches the inner hole of the needle bearing 10 without inner ring, the middle part is a gear, the outer diameter of the lower shaft matches the inner hole of the second double row ball bearing 11, the lower end is connected to the planetary rotating seat 16 by setting a positioning pin shaft 15 and a connecting screw 14, and the gear on the planetary gear shaft 13 is meshed with the inner gear ring 5; the planetary rotating seat 16 is connected to the driving pin shaft 17 by bolts, the driving pin shaft 17 has an arc groove inside, the middle part of the driving pin shaft 17 is equipped with a retaining ring 18 and a needle bearing 19, and the end is fixed with a positioning retaining ring 20 by screws. Specifically, the rotation of the hydraulic motor 1 drives the planetary gear frame 7 to rotate, while the inner ring gear 5 is fixed and does not rotate. The planetary gear shaft 13 rotates around the inner ring gear 5, driving the planetary rotating seat 16 to rotate. The driving pin shaft 17 installed on the planetary rotating seat 16 makes a linear motion in a set plane, thereby driving the cutter to make a reciprocating linear motion. The planetary gear mechanism is used to convert the rotary motion of the hydraulic motor into a linear transmission of the driving pin shaft. The structure is compact, the vibration is small, and the transmission is stable and reliable. Therefore, there is no external force in the vertical direction of the cutter, which greatly improves the service life of the cutter.

[0020] In this embodiment, the power source of the hydraulic motor 1 comes from the hydraulic output of an excavator or a loader. The hydraulic output of an existing excavator or a loader is used to drive the hydraulic motor, thereby reducing the cost of purchasing the machine and the cost of equipment maintenance.

[0021] In this embodiment, a butter cup 21 is installed in the middle of the outer side of the fixing seat 2 and in the arc groove of the driving pin. The butter cup 21 is used to inject butter, and the butter is used for lubrication.

[0022] In summary, the utility model utilizes the hydraulic output of an existing excavator or loader to drive a hydraulic motor, thereby reducing machine purchase costs and equipment maintenance costs; a planetary gear mechanism is used to convert the rotary motion of the hydraulic motor into a linear drive of a drive pin shaft, which has a compact structure, small vibration, and stable and reliable transmission, so that there is no external force acting in the vertical direction of the cutter, greatly improving the service life of the cutter; hydraulic transmission is used, which is easy to operate; it can be matched with cutters of various models of hedge trimmers, and is simple and convenient to install.

[0023] The above description is only used to illustrate the technical solution of the utility model rather than to limit it. Other modifications or equivalent substitutions made to the technical solution of the utility model by ordinary technicians in this field should be included in the scope of the claims of the utility model as long as they do not depart from the spirit and scope of the technical solution of the utility model.

Claims

1. A drive device for a hedge trimmer cutter, comprising a hydraulic motor and a fixing seat, the two being fixed by bolts, characterized in that: The first double-row ball bearing is installed on the upper part of the inner hole of the fixed seat, the first hole retaining ring is installed on the lower part of the first double-row ball bearing, the inner gear ring is fixed in the middle with a hexagon socket screw, and a single-row ball bearing is installed on the lower part; a planetary gear bracket is arranged in the fixed seat, the output shaft of the hydraulic motor is transmission-connected with the planetary gear bracket through a flat key, the upper end of the outer side of the planetary gear bracket cooperates with the inner hole of the first double-row ball bearing, a shaft retaining ring is installed on the upper side of the first double-row ball bearing, the outer side of the middle and lower part is sleeved on the inner side of the single-row ball bearing and cooperates with the inner hole of the single-row ball bearing, the planetary gear bracket has an inner hole, and a needle roller bearing without an inner ring is installed on the upper part of the inner hole, and a A second double-row ball bearing is installed, and a second hole retaining ring is installed at the lower part of the second double-row ball bearing; a planetary gear shaft is arranged in the inner hole of the planetary gear bracket, the outer diameter of the upper shaft of the planetary gear shaft matches the inner hole of the needle roller bearing without an inner ring, the middle part is a gear, the outer diameter of the lower shaft matches the inner hole of the second double-row ball bearing, and the lower end is connected to the planetary rotating seat by setting a positioning pin and a connecting screw, and the gear on the planetary gear shaft is meshed with the inner gear ring; the planetary rotating seat is connected to the driving pin shaft by bolts, an arc groove is provided inside the driving pin shaft, a retaining ring and a needle roller bearing are arranged in the middle part of the driving pin shaft, and the positioning retaining ring is fixed by screws at the end.

2. A hedge trimmer cutter drive device according to claim 1, characterized in that: The power source of the hydraulic motor comes from the hydraulic output of the excavator or loader.

3. A hedge trimmer cutter drive device according to claim 1, characterized in that: A butter cup is arranged in the middle part of the outer side of the fixing seat and in the arc groove of the driving pin shaft.

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