Gear shifting mechanism of gear box of driving rake

Abstract

The utility model provides a gear shifting mechanism of a driving harrow gear box, and belongs to the technical field of machinery. The problems that an existing driving rake gearbox is inconvenient to use and not wide in application range are solved. According to the gear shifting mechanism of the driving rake gear box, the driving rake gear box comprises a box body, an input shaft and a duplicate gear, the gear shifting mechanism comprises a rotating shaft which is inserted into the box body and can rotate, the inner end of the rotating shaft is vertically and fixedly connected with a connecting rod, the other end, close to the rotating shaft, of the connecting rod is fixedly connected with a gear shifting block, and the outer side wall of the duplicate gear is provided with an annular groove; the gear shifting block can be embedded into the annular groove, the outer end of the rotating shaft is fixedly connected with a handle, the handle can drive the rotating shaft to rotate, a locking mechanism is arranged between the rotating shaft or the handle and the box body, and the locking mechanism can position the rotating shaft and the box body. The gear shifting mechanism of the driving harrow gearbox has the advantages of being capable of achieving gear shifting and wide in application range.

Description

Technical Field

[0001] The utility model belongs to the technical field of machinery and relates to a driving rake gear box, in particular to a shifting mechanism of the driving rake gear box. Background Art

[0002] Drive harrows are tillage machines that are pulled and driven by tractors to complete soil crushing and harrowing operations. Due to their advantages such as strong soil adaptability and good soil crushing effect, drive harrows have gradually been accepted by users. Land preparation, the most basic operation in agricultural field production, is also the operation that consumes the most energy in field mechanized operations. Therefore, the reliability and ease of maintenance and adjustment of the drive harrow gearbox directly affect the working performance of the entire machine. With the continuous improvement of tractor power in recent years, the drive harrow gearbox matching high-power tractors has become the main factor restricting the large-scale development of drive harrows.

[0003] Existing drive harrow gearboxes have inconvenient bearing clearances, bevel gear side clearances, and meshing marks, resulting in low transmission efficiency and high noise levels. Furthermore, they have inefficient sealing, are difficult to install, maintain, and disassemble, and are prone to oil leakage. Furthermore, these gearboxes have limitations and are unsuitable for use with high-power tractors. For example, a power-driven harrow gearbox (Application No. 202021801206.1) disclosed in a Chinese patent document includes a main housing, a housing base, and three shafts: a first-shaft adjustment pad is installed between the first-shaft end cover and the main housing; a rear cover adjustment pad is installed between the housing rear cover and the main housing; a small right taper adjustment pad is installed between the second-shaft end cover and the outer end face of the bearing; a second-shaft gasket and a small left taper adjustment pad are installed between the circlip II and the outer end face of the bearing; a second-shaft adjustment pad is installed between the second-shaft end cover and the main housing; and a large taper adjustment pad is installed between the housing base and the bottom surface of the main housing. However, this power-driven harrow gearbox has a single gear position, making it inconvenient to use and limited in scope. Summary of the Invention

[0004] The purpose of the utility model is to solve the above problems in the existing technology and to propose a shift mechanism for a driving rake gear box that can realize shifting and has a wide range of applications.

[0005] The purpose of the utility model can be achieved through the following technical solutions: a shifting mechanism for a driving rake gear box, the driving rake gear box includes a box body, an input shaft and a double gear circumferentially fixed to the input shaft, and is characterized in that the shifting mechanism includes a rotating shaft inserted on the box body and capable of rotating, the inner end of the rotating shaft is vertically fixed with a connecting rod, the other end of the connecting rod close to the rotating shaft is fixed with a shift block, the outer side wall of the double gear has an annular groove, the shift block can be embedded in the annular groove, the outer end of the rotating shaft is fixed with a handle and the handle can drive the rotating shaft to rotate, a locking mechanism is provided between the rotating shaft or the handle and the box body, and the locking mechanism can position the rotating shaft and the box body.

[0006] The duplex gears of the drive rake gearbox include coaxially connected Gear 1 and Gear 2. A horizontally arranged transmission shaft passes through the housing, to which Gear 3 and Gear 4 are attached. The duplex gears can move axially, meshing Gear 1 with Gear 3 or Gear 2 with Gear 4. A vertically arranged output shaft is axially attached to the housing, with Gear 5 attached to its upper end and Gear 6 attached to its other end, meshing with Gear 6. To shift gears, a locking mechanism is unlocked, allowing the rotating shaft to rotate relative to the housing. The handle drives the rotating shaft, which in turn drives the connecting rod to swing. Since the shift block is embedded in the annular groove of the duplex gears, the connecting rod drives the shift block, causing the duplex gears to move axially, meshing Gear 1 with Gear 3 or Gear 2 with Gear 4, achieving different transmission ratios and thus shifting gears. The system has the advantages of simple structure, reliable operation, and a wide range of applications.

[0007] In the shift mechanism of the aforementioned driving rake gearbox, the handle is a grip fixedly connected to the outer end of the rotating shaft. A pin is provided transversely through the outer end of the rotating shaft, and both ends of the pin extend through the handle. A pin is provided through the upper end of the rotating shaft and extends through the handle, thereby firmly connecting the handle to the rotating shaft. This provides the advantages of a secure connection and easy assembly and disassembly.

[0008] In the shift mechanism of the aforementioned drive rake gearbox, the handle is embedded with a connecting block having a hexagonal cross-section. The connecting block is coaxially arranged with the rotating shaft. The upper end of the rotating shaft is inserted into the connecting block, and both ends of the pin pass through the connecting block and the handle. The connecting block embedded in the handle securely connects the handle to the rotating shaft, providing a strong and secure connection.

[0009] In the shift mechanism of the aforementioned drive rake gearbox, the locking mechanism includes a fixed block fixedly connected to the rotating shaft, the fixed block being provided with a locating pin and a spring, the upper end of the locating pin being fixedly connected to a second handle, and a locating groove being provided on the outer wall of the housing. The spring is capable of pushing the locating pin so that its lower end extends beyond the lower end surface of the fixed block and engages within the locating groove. When the rotating shaft and the housing are locked, the spring force pushes the locating pin into the locating groove. When shifting gears, the locating pin is lifted upward by the second handle to disengage it from the locating groove. This provides the advantages of a reliable structure and convenient operation.

[0010] In the shift mechanism of the aforementioned driving rake gearbox, the handle is a shift knob vertically fixed to the upper end of the rotating shaft. The shift knob is in the form of a long rod, one end of which is fixed to the outer end of the rotating shaft, and the other end of which is a grip. The shift knob is in the form of a long rod, and rotating the grip drives the rotating shaft, providing the advantages of labor-saving and reliable operation.

[0011] In the shift mechanism of the aforementioned driving rake gearbox, the locking mechanism includes a locating pin and a spring disposed on the grip portion. The upper end of the locating pin is fixedly connected to a second handle. A locating groove is provided on the outer wall of the housing. The spring is capable of pushing the locating pin so that its lower end extends beyond the lower end surface of the shift block and engages within the locating groove. When the shift handle is locked with the housing, the spring force pushes the locating pin into the locating groove. To shift gears, the locating pin is lifted upward by the second handle to disengage it from the locating groove. This provides the advantages of a reliable structure and convenient operation.

[0012] In the shift mechanism of the driving rake gearbox, the lower end of the shift block is a flat plug-in portion, which is inserted into the annular groove. The use of the plug-in portion has reliable and stable transmission and a long service life.

[0013] In the shift mechanism of the aforementioned driving rake gearbox, the double gear comprises coaxially arranged gear 1 and gear 2. The inner end surfaces of gear 1 and gear 2 form the aforementioned annular groove, and gear 1 and gear 2 are fixedly connected by screws. This arrangement offers the advantages of easy manufacturing and a reliable structure.

[0014] In the shift mechanism of the aforementioned driving rake gearbox, the duplex gears comprise coaxially arranged gears 1 and 2, with the inner end surfaces of gears 1 and 2 forming the aforementioned annular groove. Gears 1 and 2 are integrally structured. This arrangement provides the duplex gears with the advantages of high strength and long service life.

[0015] Compared with the prior art, the shift mechanism of the drive rake gearbox has the following advantages:

[0016] 1. When shifting gears, the handle drives the rotating shaft to rotate, and the rotating shaft drives the connecting rod to swing. Since the shift block is embedded in the annular groove of the double gear, the connecting rod drives the shift block to move the double gear axially, so that gear one and gear three are engaged or gear two and gear four are engaged, thereby achieving different transmission ratios and thus achieving gear shifting. It has the advantages of simple structure, reliable operation and wide range of applications.

[0017] 2. The pin at the upper end of the rotating shaft passes through the handle to connect the handle to the rotating shaft, which has the advantages of firm connection and easy assembly and disassembly;

[0018] 3. The handle is embedded with a connecting block with a hexagonal cross section. The connecting block is coaxial with the rotating shaft. The upper end of the rotating shaft is inserted into the connecting block. Both ends of the pin pass through the connecting block and the handle, which has the advantages of high connection strength and firm connection.

[0019] 4. When the shaft is locked with the housing, the spring pushes the positioning pin into the positioning groove. When shifting gears, the second handle is used to lift the positioning pin up to disengage it from the positioning groove. This has the advantages of reliable structure and easy operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a three-dimensional schematic diagram of an implementation of the shift mechanism of the driving rake gear box.

[0021] Figure 2 2. It is a top view schematic diagram of the first embodiment of the shift mechanism.

[0022] Figure 3 yes Figure 2 Schematic diagram of a partial cross-section of AA.

[0023] Figure 4 It is a partial schematic diagram of an implementation of the shift mechanism of the drive rake gear box.

[0024] Figure 5 It is a cross-sectional schematic diagram of an implementation of the shift mechanism of the driving rake gear box.

[0025] Figure 6 It is a top view schematic diagram of the second embodiment of the shift mechanism of the drive rake gear box.

[0026] Figure 7 It is a partial schematic diagram of the second embodiment of the shift mechanism of the driving rake gear box.

[0027] Figure 8 yes Figure 6 BB cross-sectional diagram.

[0028] In the figure, 1. housing; 1a. positioning groove; 2. input shaft; 3. duplex gear; 3a. annular groove; 3b. gear one; 3c. gear two; 4. rotating shaft; 5. connecting rod; 6. shift block; 6a. plug-in part; 7. handle; 7a. handle; 7b. shift handle; 7b1. gripping part; 8. locking mechanism; 8a. fixing block; 8b. positioning pin; 8c. spring; 8d. handle two; 9. pin; 10. connecting block; 11. transmission shaft; 12. gear three; 13. gear four; 14. output shaft; 15. gear five; 16. gear six. DETAILED DESCRIPTION

[0029] The following are specific embodiments of the present invention and the accompanying drawings to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

[0030] Example 1

[0031] like Figures 1 to 5 As shown, the shifting mechanism of the driving rake gear box includes a box body 1, an input shaft 2 and a double gear 3 circumferentially fixed to the input shaft 2, and is characterized in that the shifting mechanism includes a rotating shaft 4 inserted on the box body 1 and capable of rotating, the inner end of the rotating shaft 4 is vertically fixed with a connecting rod 5, and the other end of the connecting rod 5 close to the rotating shaft 4 is fixed with a shift block 6, the outer side wall of the double gear 3 has an annular groove 3a, the shift block 6 can be embedded in the annular groove 3a, the outer end of the rotating shaft 4 is fixed with a handle 7 and the handle 7 can drive the rotating shaft 4 to rotate, and a locking mechanism 8 is provided between the rotating shaft 4 or the handle 7 and the box body 1, and the locking mechanism 8 can position the rotating shaft 4 and the box body 1.

[0032] Handle 7 is a grip 7a fixedly connected to the outer end of shaft 4. A pin 9 is provided transversely through the outer end of shaft 4. Handle 7a is embedded with a connecting block 10 with a hexagonal cross section. Connecting block 10 is coaxially arranged with shaft 4. The upper end of shaft 4 is inserted into connecting block 10. Both ends of pin 9 pass through connecting block 10 and handle 7a. Connecting block 10 embedded in handle 7a secures handle 7a to shaft 4, providing a strong and secure connection.

[0033] The locking mechanism 8 includes a fixed block 8a fixedly connected to the rotating shaft 4, and a positioning pin 8b and a spring 8c are provided on the fixed block 8a. The upper end of the positioning pin 8b is fixedly connected to a handle 8d. The outer wall of the box body 1 is provided with a positioning groove 1a. The spring 8c can push the positioning pin 8b so that the lower end of the positioning pin 8b extends out of the lower end surface of the fixed block 8a and is embedded in the positioning groove 1a.

[0034] The lower end of the shift block 6 is a flat plug-in portion 6a, which is inserted into the annular groove 3a, and has reliable and stable transmission and a long service life.

[0035] The duplex gear 3 comprises coaxially arranged gear 1 3b and gear 2 3c. The inner end surfaces of gear 1 3b and gear 2 3c form the aforementioned annular groove 3a. Gear 1 3b and gear 2 3c are securely connected by screws, resulting in convenient manufacturing and a reliable structure. Alternatively, the duplex gear 3 comprises coaxially arranged gear 1 3b and gear 2 3c. The inner end surfaces of gear 1 3b and gear 2 3c form the aforementioned annular groove 3a. Gear 1 3b and gear 2 3c are integrally constructed, resulting in high strength and a long service life for the duplex gear 3.

[0036] A horizontally arranged transmission shaft 11 is passed through the housing 1, and gear three 12 and gear four 13 are fixedly connected to the transmission shaft 11. The double gear 3 can move axially so that gear one 3b is engaged with gear three 12 or gear two 3c is engaged with gear four 13. A vertically arranged output shaft 14 is axially fixedly connected to the housing 1, and gear five 15 is fixedly connected to the upper end of the output shaft 14. Gear six 16 is fixedly connected to the other end of the transmission shaft 11, and gear five 15 is engaged with gear six 16. When the rotating shaft 4 is locked with the housing 1, the elastic force of the spring 8c pushes the positioning pin 8b to be embedded in the positioning groove 1a. When gear shifting is required, the positioning pin 8b is lifted up by the second handle 8d to disengage the positioning pin 8b from the positioning groove 1a so that the rotating shaft 4 can rotate relative to the housing 1. The rotating shaft 4 is driven to rotate by the handle 7, and the rotating shaft 4 drives the connecting rod 5 to swing. Since the shift block 6 is embedded in the annular groove 3a of the double gear 3, the connecting rod 5 drives the shift block 6 to move the double gear 3 axially, so that gear 1 3b is meshed with gear 3 12 or gear 2 3c is meshed with gear 4 13, thereby achieving different transmission ratios and thus achieving gear shifting. It has the advantages of simple structure, reliable operation and wide range of applications.

[0037] Example 2

[0038] The structure and principle of this embodiment are roughly the same as those of the first embodiment. The difference is that: Figure 6-8As shown, handle 7 is a shift knob 7b vertically attached to the upper end of shaft 4. Shift knob 7b is a long rod, one end of which is fixedly attached to the outer end of shaft 4, and the other end of which is a grip portion 7b1. Locking mechanism 8 includes a positioning pin 8b and a spring 8c disposed on grip portion 7b1. The upper end of positioning pin 8b is fixedly attached to handle 2 8d. A positioning groove 1a is provided on the outer wall of housing 1. Spring 8c pushes positioning pin 8b so that its lower end extends beyond the lower end surface of shift block 6 and engages within positioning groove 1a. Shift knob 7b is a long rod that rotates shaft 4 by rotating grip portion 7b1, offering the advantages of effortless and reliable operation. When the shift handle 7b is locked with the box body 1, the elastic force of the spring 8c pushes the positioning pin 8b into the positioning groove 1a. When shifting gears is required, the positioning pin 8b is lifted up by the handle 8d to disengage the positioning pin 8b from the positioning groove 1a. It has the advantages of reliable structure and easy operation.

[0039] The specific embodiments described herein are merely illustrative of the spirit of the present invention. Persons skilled in the art may make various modifications, additions, or substitutions to the described specific embodiments without departing from the spirit of the present invention or exceeding the scope defined by the appended claims.

Claims

1. A shift mechanism for a driving rake gearbox, the driving rake gearbox comprising a housing (1), an input shaft (2) and a duplex gear (3), characterized in that: The shift mechanism comprises a rotating shaft (4) inserted into the housing (1) and capable of rotating, the inner end of the rotating shaft (4) being vertically fixedly connected to a connecting rod (5), the other end of the connecting rod (5) close to the rotating shaft (4) being fixedly connected to a shift block (6), the outer side wall of the double gear (3) having an annular groove (3a), the shift block (6) being capable of being embedded in the annular groove (3a), the outer end of the rotating shaft (4) being fixedly connected to a handle (7), and the handle (7) being capable of driving the rotating shaft (4) to rotate, a locking mechanism (8) being provided between the rotating shaft (4) or the handle (7) and the housing (1), and the locking mechanism (8) being capable of positioning the rotating shaft (4) and the housing (1).

2. The shift mechanism of the driving rake gearbox according to claim 1, characterized in that: The handle (7) is a handle (7a) fixedly connected to the outer end of the rotating shaft (4), and a pin (9) is transversely passed through the outer end of the rotating shaft (4), and both ends of the pin (9) pass through the handle (7a).

3. The shift mechanism of the driving rake gearbox according to claim 2, characterized in that: The handle (7a) is embedded with a connecting block (10) having a hexagonal cross section. The connecting block (10) is coaxially arranged with the rotating shaft (4). The upper end of the rotating shaft (4) is inserted into the connecting block (10). Both ends of the pin (9) pass through the connecting block (10) and the handle (7a).

4. The shift mechanism of the driving rake gearbox according to claim 1, 2 or 3, characterized in that: The locking mechanism (8) comprises a fixed block (8a) fixedly connected to the rotating shaft (4); a positioning pin (8b) and a spring (8c) are provided on the fixed block (8a); the upper end of the positioning pin (8b) is fixedly connected to a second handle (8d); the outer side wall of the box body (1) is provided with a positioning groove (1a); the spring (8c) can push the positioning pin (8b) so that the lower end of the positioning pin (8b) extends out of the lower end surface of the fixed block (8a) and is embedded in the positioning groove (1a).

5. The shift mechanism of the driving rake gearbox according to claim 1, 2 or 3, characterized in that: The handle (7) is a shift handle (7b) vertically fixed to the upper end of the rotating shaft (4); the shift handle (7b) is in the shape of a long rod; one end of the shift handle (7b) is fixed to the outer end of the rotating shaft (4); and the other end of the shift handle (7b) is a gripping portion (7b1).

6. The shift mechanism of the driving rake gearbox according to claim 5, characterized in that: The locking mechanism (8) includes a positioning pin (8b) and a spring (8c) arranged on the gripping portion (7b1); the upper end of the positioning pin (8b) is fixedly connected to a second handle (8d); the outer side wall of the box body (1) is provided with a positioning groove (1a); the spring (8c) can push the positioning pin (8b) so that the lower end of the positioning pin (8b) extends out of the lower end surface of the shift block (6) and is embedded in the positioning groove (1a).

7. The shift mechanism of the driving rake gearbox according to claim 1, 2 or 3, characterized in that: The lower end of the shift block (6) is a flat plug-in portion (6a), and the plug-in portion (6a) is inserted into the annular groove (3a).

8. The shift mechanism of the driving rake gearbox according to claim 1, 2 or 3, characterized in that: The double gear (3) includes a coaxially arranged gear 1 (3b) and a coaxially arranged gear 2 (3c), wherein the inner end surfaces of the gear 1 (3b) and the gear 2 (3c) form the above-mentioned annular groove (3a), and the gear 1 (3b) and the gear 2 (3c) are fixedly connected by screws.

9. The shift mechanism of the driving rake gearbox according to claim 1, 2 or 3, characterized in that: The double gear (3) includes a coaxially arranged gear 1 (3b) and a coaxially arranged gear 2 (3c), wherein the inner end surfaces of the gear 1 (3b) and the gear 2 (3c) form the above-mentioned annular groove (3a), and the gear 1 (3b) and the gear 2 (3c) are an integral structure.

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