CN209705226U - A kind of adjustable gear of reference diameter - Google Patents

Abstract

The utility model belongs to the technical field of mechanical transmission part, it is related to a kind of adjustable gear of reference diameter, it includes axle sleeve, first ring gear, second ring gear and third ring gear, axle sleeve is equipped with wing plate and baffle, the first spline is offered on the inner sidewall of first ring gear, lateral wall is equipped with first gear teeth, the second spline is offered on the inner sidewall of second ring gear, lateral wall is equipped with second gear teeth, third spline is offered on the inner sidewall of third ring gear, lateral wall is equipped with the third gear teeth, baffle is vertical with axle sleeve, it is equipped with the first bolt thereon, second bolt and third bolt, each bolt is each perpendicular to baffle plate setting, it is threadedly engaged with baffle, and respectively with the first ring gear, second ring gear and the rotation connection of third gear；The utility model has when adjusting transmission ratio without being replaced, and can be directly changed the reference diameter of gear, to reduce equipment gear quantity, and can remove disassembling operations from, reduce the effect of workload.

Description

A gear with adjustable pitch circle diameter

technical field

The utility model relates to the technical field of mechanical transmission parts, in particular to a gear with adjustable pitch circle diameter.

Background technique

Gear transmission is one of the most widely used transmission forms in mechanical transmission, and it is mainly used to transmit the rotary motion between two rotating shafts. Compared with the belt-cot drive, the gear drive is more precise and does not slip; compared with the chain-sprocket drive, the gear drive can withstand a larger load.

At present, the Chinese patent with the notification number CN202992108U discloses a gear, which includes a gear body and a shaft hole located at the center of the gear. The gear body includes a large half wheel and a small half wheel. Protrusions are arranged on the top, and the large half wheel and the small half wheel are fixedly connected by the card slot and the protrusion. The small half wheel has two parallel sides, and the two parallel sides are respectively tangent to the shaft hole.

The above-mentioned existing technical solutions have the following defects: the same as most gears, the diameter of the pitch circle of this gear is fixed, and when two of them cooperate, the transmission ratio remains unchanged all the time. To change the transmission ratio, it is often necessary to replace the gears. On the one hand, it needs to be equipped with multiple gears with different pitch circle diameters, which increases the cost; on the other hand, it is inconvenient to operate when disassembling the gears, which increases the workload.

Utility model content

The purpose of this utility model is to provide a gear with adjustable index circle diameter, which can directly change the index circle diameter of the gear without replacing it when adjusting the transmission ratio, thereby reducing the number of spare gears and eliminating the need to disassemble Install operation, reduce the effect of workload.

The above-mentioned technical purpose of the utility model is achieved through the following technical solutions:

A gear with adjustable pitch circle diameter, characterized in that it includes a shaft sleeve matched with the rotating shaft, a first gear ring sleeved on the shaft sleeve, a second gear ring sleeved on the first gear ring, and a sleeve The third gear ring is arranged on the second gear ring. The shaft sleeve is provided with several wings and a baffle. The wings are arranged around the shaft sleeve and parallel to the shaft sleeve. The inner wall of the first gear ring There are first spline grooves for sliding fit with the wing plate on the top, a number of first gear teeth are set on the outer wall, and second spline grooves for sliding fit with the first gear teeth are opened on the inner wall of the second gear ring. The outer wall is provided with a number of second gear teeth, the inner wall of the third gear ring is provided with a third spline groove for sliding fit with the second gear teeth, and the outer wall is provided with a number of third gear teeth. The plate is perpendicular to the shaft sleeve, and the baffle plate is pierced with a first bolt, a second bolt and a third bolt, and the first bolt, the second bolt and the third bolt are all arranged perpendicular to the baffle plate, and are threadedly matched with the baffle plate, And they are respectively connected in rotation with the first gear ring, the second gear ring and the third gear.

By adopting the above technical solution, the first bolt is screwed, and the first gear ring is pushed out. During this process, the wing plate slides in the first spline groove, and the first gear teeth are exposed to the outside and can be meshed with other gears. At this time, the The diameter of the pitch circle of the gear is the smallest; further screw the second bolt, the second gear ring is pushed out, the second gear teeth are exposed and meshed with other gears, at this time the pitch circle diameter of the gear increases; further screw the second gear Three bolts, push out the third gear ring, then the diameter of the index circle of the gear reaches the maximum; when adjusting the transmission ratio, there is no need to replace it, and the diameter of the index circle of the gear can be directly changed, thereby reducing the number of spare gears and being able to Eliminate disassembly and assembly operations and reduce workload.

The utility model is further set as: the first guide rod, the second guide rod and the third guide rod are pierced on the baffle, and the first guide rod, the second guide rod and the third guide rod are all perpendicular to the baffle. The plate is arranged to slide and cooperate with the baffle plate, and is fixedly connected with the first gear ring, the second gear ring and the third gear respectively.

By adopting the above technical solution, taking the first guide rod as an example, in the process of screwing the first bolt to push out the first gear ring, the first guide rod plays a guiding role, so that the first gear ring can stably move along the shaft sleeve. Move in the direction of the axis to avoid the first gear ring being stuck due to its own inclination during the movement; after the first gear ring is ejected, the first guide rod connects it with the baffle plate to play a supporting role.

The utility model is further configured as follows: the first guide rod, the second guide rod and the third guide rod are all provided with a limit ring, and the limit ring is located on the side of the baffle plate facing away from the first gear ring.

By adopting the above technical solution, taking the first guide rod as an example, a limit ring is set. When the limit ring and the side of the baffle plate facing away from the first gear ring are in contact, the first bolt cannot continue to push the first gear ring out. , to prevent the first spline groove on the inner side wall from detaching from the wing plate on the shaft sleeve after the first gear ring slides out completely, so that the first gear ring cannot drive the shaft sleeve to rotate.

The utility model is further configured as: the distance between the limit ring and the corresponding first gear ring, second gear ring and third gear ring is equal.

By adopting the above technical scheme, the distance between the limit ring and the first gear ring, the second gear ring, and the third gear ring is equal, so after the first gear ring, the second gear ring, and the third gear ring are pushed out, The distance between it and the baffle plate is equal, the two ends are flush with each other, and the contact area between each spline groove and the gear teeth is the largest, which can better transmit the force.

The utility model is further configured as follows: the baffle plate fits with the end faces of the first gear ring, the second gear ring and the third gear ring, and several reinforcing ribs are arranged between the baffle plate and the shaft sleeve, and the reinforcing ribs are located at the The plate faces away from the side of the first gear ring.

By adopting the above technical solution, taking the first gear ring as an example, the first bolt and the first guide rod connect it to the baffle. When the first gear tooth is stressed, some of it will be transmitted to the baffle, and a reinforcing rib is provided. The structural strength of the joint between the baffle and the shaft sleeve can be greatly increased, so that the baffle is not easily damaged after being stressed.

The utility model is further configured as follows: the outer wall of the baffle is provided with an annular guard plate, the guard plate is parallel to the shaft sleeve, and the inner wall of the guard plate is offset against the third gear teeth.

By adopting the above technical scheme, the guard plate is set to cover the outer side of the third gear teeth. When the third gear ring is pushed out, it can prevent sundries from entering between the gear rings and the baffle plates at all levels, and prevent the gear rings from being unable to shrink smoothly. back.

The utility model is further configured as: the inner side wall of the guard plate is provided with a fourth spline groove slidingly matched with the third gear teeth.

By adopting the above technical scheme, the inner side wall of the guard plate is provided with a fourth spline groove, which slides and fits with the third gear teeth, that is, closely fits with the third gear teeth, and prevents dust from entering the gap between the third gear teeth and the guard plate. Enter between the gear rings and baffles at all levels.

In summary, the beneficial technical effects of the utility model are:

1. There is no need to replace it when adjusting the transmission ratio, and the diameter of the pitch circle of the gear can be directly changed, thereby reducing the number of spare gears, and can save the disassembly operation and reduce the workload;

2. The setting of guard plates can effectively prevent sundries from entering between the gear rings and baffle plates at all levels, so that each structure of the gear can run stably.

Description of drawings

Fig. 1 is the overall structural representation of the utility model;

Fig. 2 is the explosion schematic diagram of the utility model;

Fig. 3 is a schematic structural diagram for embodying the baffle in the embodiment.

In the figure, 1. shaft sleeve; 2. first gear ring; 3. second gear ring; 4. third gear ring; 5. wing plate; 6. baffle plate; 7. guard plate; , the first spline groove; 22, the first gear tooth; 31, the second spline groove; 32, the second gear tooth; 41, the third spline groove; 42, the third gear tooth; 61, the first bolt; 62, the second gear tooth Two bolts; 63, the third bolt; 64, the first guide rod; 65, the second guide rod; 66, the third guide rod; 67, the limit ring; 71, the fourth spline groove.

Detailed ways

Below in conjunction with accompanying drawing, the utility model is described in further detail.

Referring to Fig. 1 and Fig. 2, it is a gear with an adjustable pitch circle diameter disclosed by the utility model, which includes a shaft sleeve 1, on which a first toothed ring 2, a second toothed ring 3 and The third gear ring 4 has the same thickness as the above-mentioned gear rings at all levels, and is coaxially arranged with the shaft sleeve 1 . In addition, there is a baffle plate 6 coaxial with the shaft sleeve 1 on the shaft sleeve 1. The baffle plate 6 is arranged perpendicular to the shaft sleeve 1, fixedly connected with the shaft sleeve 1, and fits with the end faces of the gear rings at all levels. Connected with guard plate 7.

Referring to FIG. 2 , a first spline groove 21 is opened on the inner side wall of the first gear ring 2 , and a plurality of first gear teeth 22 are fixed on the outer side wall thereof. A number of wing plates 5 are fixed on the side wall of the shaft sleeve 1 , the wing plates 5 are coplanar with the axis of the shaft sleeve 1 , are evenly distributed around the shaft sleeve 1 , and are slidably matched with the first spline groove 21 . The first gear ring 2 can slide along its own axis and rotate synchronously with the sleeve 1 .

Referring to FIG. 2 , a second spline groove 31 is formed on the inner side wall of the second gear ring 3 , and a plurality of second gear teeth 32 are fixed on the outer side wall thereof. The first gear teeth 22 are slidingly matched with the second spline groove 31 , so the second gear ring 3 can also slide along its axis and rotate synchronously with the first gear ring 2 .

Referring to FIG. 2 , a third spline groove 41 is formed on the inner side wall of the third gear ring 4 , and a plurality of third gear teeth 42 are fixed on the outer side wall thereof. The second gear teeth 32 are slidingly matched with the third spline groove 41 , so the third gear ring 4 can also slide along its axial direction and rotate synchronously with the second gear ring 3 .

Referring to FIG. 2 , the guard plate 7 is ring-shaped and coaxial with the bushing 1 , and its inner wall is provided with a fourth spline groove 71 , and the third gear teeth 42 are slidingly fitted with the fourth spline groove 71 .

Referring to FIG. 2 and FIG. 3 , a first bolt 61 and two first guide rods 64 are perforated on the baffle plate 6 , and both the first bolt 61 and the first guide rods 64 are perpendicular to the baffle plate 6 . Among them, the first bolt 61 is threadedly matched with the baffle plate 6, one end is rotationally connected with the first gear ring 2, the first guide rod 64 is slidingly fitted with the baffle plate 6, one end is fixedly connected with the first gear ring 2, and the other end is sleeved Limit ring 67.

Screw the first bolt 61 so that it moves towards the first gear ring 2, and the first gear ring 2 is ejected. In the process, the first guide rod 64 slides on the baffle plate 6 until the limit ring 67 and the baffle plate 6 against the side facing away from the first gear ring 2. The first gear teeth 22 on the first ring gear 2 are exposed, and mesh with the gear teeth on other gears for transmission.

Referring to Fig. 2 and Fig. 3, a second bolt 62 and two second guide rods 65 are also pierced on the baffle plate 6, which are set with reference to the first bolt 61 and the first guide rod 64, and cooperate with the second gear ring 3 . After the second gear ring 3 is ejected, the first gear teeth 22 are covered, and the second gear teeth 32 are changed to mesh with other gears, and the pitch circle diameter of the gears becomes larger at this moment.

Referring to Fig. 2 and Fig. 3, a third bolt 63 and two third guide rods 66 are also pierced on the baffle plate 6, which are also set with reference to the first bolt 61 and the first guide rod 64, and cooperate with the third gear ring 4 . After the third gear ring 4 is ejected, the second gear tooth 32 is covered, and the third gear tooth 42 is changed to mesh with other gears, and the pitch circle diameter of the gear is further enlarged at this moment.

Referring to Fig. 3, the distances between each limit ring 67 and the corresponding first gear ring 2, the second gear ring 3, and the third gear ring 4 are equal, and when the limit rings 67 all abut against the baffle plate 6, the first The end faces of the gear ring 2 , the second gear ring 3 and the third gear ring 4 are flush, and the third gear ring 4 is not separated from the guard plate 7 .

Referring to Fig. 3, there are nine reinforcing ribs 8 between the baffle plate 6 and the shaft sleeve 1, and the reinforcing ribs 8 are located on the side of the baffle plate 6 facing away from the first gear ring 2, and are fixedly connected to the baffle plate 6 and the shaft sleeve 1 respectively. and evenly distributed around the shaft sleeve 1 to enhance the structural strength of the baffle plate 6 .

The implementation principle of the above-mentioned embodiment is:

Screw the first bolt 61, the second bolt 62 and the third bolt 63 in sequence to push out the first gear ring 2, the second gear ring 3 and the third gear ring 4, so that the pitch circle diameter of the gear can be gradually increased . In addition, the utility model is not limited to the above-mentioned first gear ring 2, second gear ring 3, and third gear ring 4, and can also be increased step by step on this basis to obtain more changes.

The embodiments of this specific embodiment are all preferred embodiments of the present utility model, and are not intended to limit the protection scope of the present utility model accordingly: all equivalent changes made according to the structure, shape and principle of the present utility model are all valid. Should be covered within the protection scope of the present utility model.

Claims (7)

1. A gear with adjustable indexing circle diameter, characterized in that it includes a shaft sleeve (1) matched with the rotating shaft, a first toothed ring (2) sleeved on the shaft sleeve (1), and a second gear ring (2) sleeved on the shaft sleeve (1). The second gear ring (3) on the first gear ring (2) and the third gear ring (4) sleeved on the second gear ring (3), the sleeve (1) is provided with several wing plates ( 5) and a baffle (6), the wing plate (5) is set around the bushing (1) and parallel to the bushing (1), and the inner wall of the first toothed ring (2) is provided with the wing plate (5) The first spline groove (21) for sliding fit, a number of first gear teeth (22) are provided on the outer wall, and the inner wall of the second gear ring (3) is provided with the first gear teeth (22). ) for sliding fit of the second spline groove (31), the outer wall is provided with a number of second teeth (32), and the inner wall of the third gear ring (4) is provided with the second gear teeth (32) sliding The matched third spline groove (41) has a number of third gear teeth (42) on the outer wall, the baffle (6) is perpendicular to the shaft sleeve (1), and the baffle (6) is pierced with a first Bolts (61), second bolts (62) and third bolts (63), the first bolts (61), second bolts (62) and third bolts (63) are all arranged perpendicular to the baffle plate (6) , threadedly fit with the baffle plate (6), and are respectively connected in rotation with the first toothed ring (2), the second toothed ring (3) and the third gear. 2. A gear with adjustable pitch circle diameter according to claim 1, characterized in that: the baffle plate (6) is pierced with a first guide rod (64), a second guide rod (65) And the third guide rod (66), the first guide rod (64), the second guide rod (65) and the third guide rod (66) are all arranged perpendicular to the baffle (6), and the baffle (6) Sliding fit, and fixed connection with the first toothed ring (2), the second toothed ring (3) and the third gear respectively. 3. A gear with adjustable pitch circle diameter according to claim 2, characterized in that: the first guide rod (64), the second guide rod (65) and the third guide rod (66) A limit ring (67) is set on both, and the limit ring (67) is located on the side of the baffle plate (6) facing away from the first toothed ring (2). 4. A gear with adjustable pitch circle diameter according to claim 3, characterized in that: the limit ring (67) and the corresponding first gear ring (2) and second gear ring (3) , and the distance between the third ring gear (4) is equal. 5. A gear with adjustable pitch circle diameter according to claim 1, characterized in that: the baffle plate (6) is connected with the first gear ring (2), the second gear ring (3) and the third gear ring The end face of the gear ring (4) fits together, and a number of reinforcing ribs (8) are provided between the baffle (6) and the shaft sleeve (1). The reinforcing ribs (8) are located on the baffle (6) ring (2) side. 6. A gear with adjustable pitch circle diameter according to claim 1, characterized in that: the outer wall of the baffle (6) is provided with an annular guard (7), and the guard (7 ) is parallel to the shaft sleeve (1), and the inner side wall of the guard plate (7) is against the third gear tooth (42). 7. A gear with adjustable pitch circle diameter according to claim 6, characterized in that: the inner side wall of the guard plate (7) is provided with a fourth flower that is slidingly matched with the third gear teeth (42) keyway (71).