Shifting fork device of transmission gear

Abstract

The utility model relates to a shifting fork device, in particular to a shifting fork device of a transmission gear. Comprising an assembling frame, a speed reducer is fixedly installed on one side of the assembling frame, an output shaft of the speed reducer penetrates through one side of the assembling frame and is coaxially and fixedly connected with a main shaft, a driving gear is coaxially arranged on the main shaft, and an annular groove is coaxially formed in the driving gear. According to the utility model, the L-shaped handle is rotated towards the direction close to the grip, so that after one end of the bolt is drawn out from one of the limiting holes, the sleeve moves along the axis direction of the guide post by moving the grip, and the arc-shaped rod in the shifting fork rod drives the driving gear to move along the axis direction of the main shaft; and the L-shaped handle is loosened to enable the springback spring to push the bolt into the other limiting hole, so that the position of the driving gear can be adjusted and locked, the effect of controlling the separation or combination of the driving gear and the driven gear is achieved, the flexibility of a machine tool during workpiece machining is improved, and the workpiece machining efficiency of the machine tool is improved.

Description

Technical Field

[0001] This utility model relates to a shift fork device, specifically, to a shift fork device for a transmission gear. Background Technology

[0002] With the gradual improvement of domestic industrial production level, there are also higher requirements for the control of the motion flexibility of some machine tool products. Machine tools are usually equipped with a central control box, which usually contains a drive source and a gear transmission mechanism. When the drive source drives the gear transmission mechanism to operate, the gear transmission mechanism will drive some moving parts on the machine tool to perform predetermined actions to process the workpiece.

[0003] During the machining process of a workpiece using a machine tool, the operator needs to disengage the drive gear and driven gear in the central control box according to the machining requirements to stop the gear transmission mechanism from driving some moving parts, thus meeting the machining requirements of the workpiece. In the existing technology, a handwheel or motor is usually installed in the central control box to drive the drive gear to move, so as to achieve the effect of separating or engaging the drive gear and driven gear. However, the operator's method of moving the drive gear by turning the handwheel is time-consuming and reduces the machining efficiency of the machine tool. Using a motor to precisely control the movement of the drive gear has the problem of high cost of motors and supporting electrical control equipment, which will bring a high economic burden to the enterprise. Utility Model Content

[0004] The purpose of this invention is to provide a shift fork device for transmission gears to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, one objective of this utility model is to provide a shift fork device for a transmission gear, including an assembly frame. A reducer is fixedly mounted on one side of the assembly frame. The output shaft of the reducer passes through one side of the assembly frame and is coaxially fixedly connected to a main shaft. A drive gear is coaxially mounted on the main shaft, and an annular groove is coaxially formed on the drive gear. When the output shaft of the reducer drives the main shaft to rotate, the main shaft drives the drive gear to rotate. A shift fork assembly is provided on the side of the assembly frame near the drive gear. The shift fork assembly includes a guide post fixedly mounted on one side of the assembly frame. A sleeve is slidably fitted onto the guide post parallel to the axis of the main shaft. A shift fork is fixedly connected to one side of the sleeve. The shift fork is a Y-shaped structure consisting of an arc-shaped rod and a straight rod. The inner arc surface of the arc-shaped rod contacts the inner wall of the annular groove, and the axes of the arc-shaped rod and the annular groove are on the same straight line. When the sleeve moves along the axis of the guide post, the sleeve drives the drive gear to move along the axis of the main shaft through the shift fork. A handle is fixedly connected to the other side of the sleeve. A limit mechanism is provided on the handle to limit the position of the handle on the guide post.

[0006] As a further improvement to this technical solution, the grip is a Z-shaped structure composed of two parallel horizontal bars and a diagonal bar, with one of the horizontal bars vertically fixed to the sleeve. The limiting mechanism includes a pin, one end of which passes through one side of the sleeve, and a guide plate is slidably fitted on the pin. The guide plate is fixedly mounted on the horizontal bar near the sleeve. Two limiting holes are opened on the guide post. When one end of the pin is inserted into the interior of one of the limiting holes, the limiting hole restricts the pin, thus fixing the sleeve to the guide post.

[0007] As a further improvement to this technical solution, the limiting mechanism also includes a convex ring coaxially fixedly connected to the pin. The convex ring is disposed between the guide plate and the sleeve. A spring sleeved on the pin is fixed between the convex ring and the guide plate. The spring drives the convex ring away from the guide plate.

[0008] As a further improvement to this technical solution, the limiting mechanism also includes an L-shaped handle hinged to the inclined rod, with a steel wire rope fixedly connected to one end of the pin away from the sleeve, and the other end of the steel wire rope fixedly set at the corner of the L-shaped handle.

[0009] As a further improvement to this technical solution, the main shaft is provided with a number of sliding grooves in an annular pattern, and the inner circumference of the drive gear is fixedly connected with a number of sliders in an annular array, and the sliders are respectively slidably disposed inside the number of sliding grooves.

[0010] As a further improvement to this technical solution, an end plate is coaxially fixedly connected to the end of the guide post away from the assembly frame, and the diameter of the end plate is larger than the diameter of the guide post.

[0011] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0012] The shift fork device of this transmission gear allows the L-shaped handle to be rotated towards the grip, causing one end of the pin to be pulled out from one of the limiting holes. By moving the grip, the sleeve moves along the axis of the guide post, causing the arc-shaped rod in the shift fork to drive the driving gear to move along the axis of the main shaft. Then, by releasing the L-shaped handle, the spring pushes the pin into the other limiting hole, thereby adjusting and locking the position of the driving gear. This achieves the effect of controlling the separation or engagement of the driving gear and the driven gear, increasing the flexibility of the machine tool when processing workpieces and improving the processing efficiency of the machine tool. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0014] Figure 2 This is a schematic diagram of the reducer, drive gear, and shift fork assembly of this utility model;

[0015] Figure 3This is a schematic diagram of the structure of the drive gear and shift fork assembly of this utility model;

[0016] Figure 4 This is a schematic diagram of the structure of the drive gear of this utility model;

[0017] Figure 5 This is a schematic diagram of the structure of the shift fork assembly of this utility model;

[0018] Figure 6 This is a cross-sectional view of the shift fork assembly of this utility model;

[0019] Figure 7 This is a schematic diagram of the limiting mechanism of this utility model.

[0020] The meanings of the labels in the diagram are as follows:

[0021] 1. Assembly rack;

[0022] 2. Reducer; 21. Main shaft; 22. Slide groove;

[0023] 3. Guide post; 31. End plate; 32. Limiting hole;

[0024] 4. Sleeve; 41. Shift fork lever; 42. Handle;

[0025] 5. Drive gear; 51. Slider; 52. Annular groove;

[0026] 6. Limiting mechanism; 61. Pin; 62. Guide plate; 63. Wire rope; 64. L-shaped handle; 65. Convex ring; 66. Spring. Detailed Implementation

[0027] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0028] Example 1

[0029] Please see Figures 1-7As shown, one of the objectives of this embodiment is to provide a shift fork device for a transmission gear, including an assembly frame 1. The assembly frame 1 is installed inside the machine tool control box. A reducer 2 is fixedly installed on one side of the assembly frame 1. A motor for driving the input shaft of the reducer 2 is fixedly installed on one side of the reducer 2. The output shaft of the reducer 2 passes through one side of the assembly frame 1 and is coaxially fixedly connected to a main shaft 21. A drive gear 5 is coaxially arranged on the main shaft 21. Several sliding grooves 22 are circumferentially formed on the main shaft 21. Several sliders 51 are fixedly connected in a circular array on the inner circumference of the drive gear 5. The several sliders 51 are slidably arranged in several... Inside the slide groove 22, the drive gear 5 has an annular groove 52 coaxially formed. When the output shaft of the motor drives the input shaft of the reducer 2 to rotate, the output shaft of the reducer 2 drives the main shaft 21 to rotate. The main shaft 21 drives the drive gear 5 to rotate through the engagement of the slide groove 22 and the slider 51. At the same time, a driven gear is rotatably set on the assembly frame 1. The driven gear outputs power to some moving parts of the machine tool. When the drive gear 5 meshes with the driven gear, the rotating drive gear 5 drives the driven gear to rotate, thereby realizing the gear transmission inside the machine tool control box. The rotating driven gear drives some moving parts of the machine tool to perform predetermined actions.

[0030] A shift fork assembly is provided on the side of the assembly frame 1 near the drive gear 5. The shift fork assembly includes a guide post 3 fixedly mounted on one side of the assembly frame 1. The axis of the guide post 3 is parallel to that of the main shaft 21, and a sleeve 4 is slidably sleeved on the guide post 3. A shift fork rod 41 is fixedly connected to one side of the sleeve 4. The shift fork rod 41 is a Y-shaped structure composed of an arc-shaped rod and a straight rod. The inner arc surface of the arc-shaped rod contacts the inner wall of the annular groove 52, and the axes of the arc-shaped rod and the annular groove 52 are on the same straight line. The arc-shaped rod and the annular groove 52 cooperate to restrict the sleeve 4 from rotating about the axis of the guide post 3. When the main shaft 21 drives the drive gear 5 to rotate, the annular groove 52 rotates relative to the arc-shaped rod. A shift fork rod is fixedly connected to the other side of the sleeve 4. The handle 42, when the operator holds the handle 42 and moves the sleeve 4 along the axis of the guide post 3, the sleeve 4 drives the shift fork rod 41 to move synchronously. The moving arc rod is always in contact with the inner wall of the annular groove 52, thereby driving the drive gear 5 to move along the axis of the main shaft 21. During the movement of the drive gear 5, several sliders 51 slide in the corresponding slide grooves 22. As the drive gear 5 moves away, the meshing area between the drive gear 5 and the driven gear gradually decreases. As the drive gear 5 gradually moves, the drive gear 5 disengages from the driven gear, causing the moving parts on the machine tool driven by the meshing transmission of the drive gear 5 and the driven gear to stop moving according to the processing requirements, increasing the flexibility of the machine tool when processing workpieces.

[0031] To prevent the moving sleeve 4 from losing contact with the guide post 3, an end plate 31 is coaxially fixedly connected to the end of the guide post 3 away from the assembly frame 1. The diameter of the end plate 31 is larger than the diameter of the guide post 3. The end plate 31 limits the movement path of the sleeve 4, preventing the sleeve 4 from losing contact with the guide post 3, thus avoiding the situation where the sleeve 4, the shift fork 41, and the handle 42 fall to the ground. This allows the operator to control the separation or engagement of the drive gear 5 and the driven gear at any time through the shift fork assembly.

[0032] To limit the position of the driving gear 5 on the main shaft 21, and to improve the stability of the meshing transmission between the driving gear 5 and the driven gear when they are engaged, while preventing the driving gear 5 from changing position and re-engaging with the driven gear when they are disengaged, a limiting mechanism 6 is provided on the handle 42. The limiting mechanism 6 is used to limit the movement of the handle 42 on the guide post 3. When the position of the handle 42 on the guide post 3 does not change, the sleeve 4 and the shift fork 41 fixedly connected to the handle 42 will also not change position. Because the arc-shaped rod in the shift fork 41 contacts the inner wall of the annular groove 52 on the driving gear 5, the arc-shaped rod limits the change of position of the driving gear 5 relative to the main shaft 21, thereby ensuring the stability of the meshing transmission between the driving gear 5 and the driven gear, and ensuring the stability after the driving gear 5 is disengaged from the driven gear.

[0033] The following details the structure of the limiting mechanism 6, referring to... Figure 5 , Figure 6 and Figure 7 The limiting mechanism 6 includes a pin 61, one end of which passes through one side of the sleeve 4. The handle 42 is a Z-shaped structure consisting of two parallel horizontal bars and a diagonal bar, with one horizontal bar vertically fixed to the sleeve 4. A guide plate 62 is slidably mounted on the pin 61 and is fixedly mounted on the horizontal bar near the sleeve 4. Two limiting holes 32 are provided on the guide post 3, located on the same horizontal plane. When one end of the pin 61 is inserted into one of the limiting holes 32, the limiting hole 32 restricts the pin 61, fixing the sleeve 4 to the guide post 3. That is, the pin 61 restricts the handle 42 through its cooperation with the limiting hole 32. The position of the lever 42 prevents it from moving along the axis of the guide post 3. The meshing position of the driving gear 5 and the driven gear corresponds to the position of one of the limiting holes 32. When the pin 61 is inserted into the interior of the limiting hole 32, the limiting mechanism 6 fixes the driving gear 5 in the meshing position with the driven gear, thereby ensuring the stability of the driving gear 5 and the driven gear during meshing transmission. The separation position of the driving gear 5 and the driven gear corresponds to the position of the other limiting hole 32. When the pin 61 is inserted into the interior of the limiting hole 32, the limiting mechanism 6 fixes the driving gear 5 in the separation position from the driven gear, thereby ensuring the stability of the driving gear 5 after separation from the driven gear.

[0034] To prevent one end of the pin 61 from moving out of the limiting hole 32, thus causing the limiting mechanism 6 to fail in limiting the position of the drive gear 5, the limiting mechanism 6 also includes a convex ring 65 coaxially fixedly connected to the pin 61. The convex ring 65 is disposed between the guide plate 62 and the sleeve 4. A spring 66 is fixed between the convex ring 65 and the guide plate 62 and sleeved on the pin 61. The spring 66 drives the convex ring 65 away from the guide plate 62, so that the rebound force of the spring 66 limits the movement of the pin 61 and the convex ring 65 away from the guide post 3, so that the pin 61 will not move out of the limiting hole 32 due to the vibration generated during the operation of the machine tool, thus ensuring the limiting effect of the pin 61 on the sleeve 4, and thus ensuring the limiting effect of the sleeve 4 and the shift fork 41 on the drive gear 5.

[0035] To facilitate the operator in withdrawing the pin 61 from one of the limiting holes 32 and inserting it into the other limiting hole 32, the limiting mechanism 6 also includes an L-shaped handle 64 hinged to the inclined rod. A steel wire rope 63 is fixedly connected to the end of the pin 61 away from the sleeve 4, and the other end of the steel wire rope 63 is fixedly located at the corner of the L-shaped handle 64. When the operator rotates the L-shaped handle 64 towards the grip 42, the L-shaped handle 64 pulls the pin 61 away from the guide post 3 via the steel wire rope 63, thereby withdrawing one end of the pin 61 from one of the limiting holes 32. During this process, the convex ring 65 and... As the spacing of the guide plates 62 shortens, the spring 66 contracts elastically. The operator then moves the handle 42, the drive gear 5, the L-shaped handle 64, and the pin 61 together toward the other limiting hole 32. When the pin 61 moves to a position where its axis is collinear with the axis of the other limiting hole 32, the operator releases the L-shaped handle 64, and the spring 66 rebounds. The rebounding spring 66 pushes the convex ring 65 to move the pin 61 toward the guide post 3 until one end of the pin 61 is inserted into the other limiting hole 32, thus completing the adjustment of the position of the drive gear 5 and the switching of the relationship between the drive gear 5 and the driven gear.

[0036] When using this device, if the operator needs to disengage the driving gear 5 from the driven gear, the operator rotates the L-shaped handle 64 towards the grip 42, causing the L-shaped handle 64 to pull one end of the pin 61 out of one of the limiting holes 32 via the wire rope 63. Then, the operator moves the grip 42 and the L-shaped handle 64 horizontally towards the other limiting hole 32. During this process, the driving gear 5 and the pin 61 move synchronously. When the pin 61 moves to a position where its axis is collinear with the axis of the other limiting hole 32, the operator releases the L-shaped handle 64. The rebounding spring 66 pushes the convex ring 65 to move the pin 61 closer to the guide post 3 until one end of the pin 61 is inserted into the other limiting hole 32, thus completing the adjustment and fixing of the position of the driving gear 5 and keeping the driving gear 5 in a disengaged state from the driven gear.

[0037] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A shift fork device for a transmission gear, comprising an assembly frame (1), characterized in that: A speed reducer (2) is fixedly installed on one side of the assembly frame (1). The output shaft of the speed reducer (2) passes through one side of the assembly frame (1) and is coaxially fixedly connected to a main shaft (21). A drive gear (5) is coaxially arranged on the main shaft (21). An annular groove (52) is coaxially opened on the drive gear (5). When the output shaft of the speed reducer (2) drives the main shaft (21) to rotate, the main shaft (21) drives the drive gear (5) to rotate. A shift fork assembly is provided on the side of the assembly frame (1) near the drive gear (5). The shift fork assembly includes a guide post (3) fixedly arranged on one side of the assembly frame (1). The axis of the guide post (3) is parallel to that of the main shaft (21), and a sleeve is slidably sleeved on the guide post (3). (4) A shift fork rod (41) is fixedly connected to one side of the sleeve (4). The shift fork rod (41) is a Y-shaped structure composed of an arc rod and a straight rod. The inner arc surface of the arc rod contacts the inner wall of the annular groove (52), and the axis of the arc rod and the annular groove (52) are on the same straight line. When the sleeve (4) moves along the axis of the guide post (3), the sleeve (4) drives the drive gear (5) to move along the axis of the main shaft (21) through the shift fork rod (41). A handle (42) is fixedly connected to the other side of the sleeve (4). A limit mechanism (6) is provided on the handle (42). The limit mechanism (6) is used to limit the position of the handle (42) on the guide post (3).

2. The shift fork device for the transmission gear according to claim 1, characterized in that: The grip (42) is a Z-shaped structure consisting of two parallel horizontal bars and a diagonal bar, with one of the horizontal bars vertically fixed to the sleeve (4). The limiting mechanism (6) includes a pin (61), one end of which passes through one side of the sleeve (4), and a guide plate (62) is slidably mounted on the pin (61). The guide plate (62) is fixedly mounted on the horizontal bar near the sleeve (4). The guide post (3) has two limiting holes (32). When one end of the pin (61) is inserted into one of the limiting holes (32), the limiting hole (32) restricts the pin (61), thus fixing the sleeve (4) on the guide post (3).

3. The shift fork device for the transmission gear according to claim 2, characterized in that: The limiting mechanism (6) also includes a convex ring (65) coaxially fixedly connected to the pin (61). The convex ring (65) is disposed between the guide plate (62) and the sleeve (4). A spring (66) sleeved on the pin (61) is fixed between the convex ring (65) and the guide plate (62). The spring (66) drives the convex ring (65) away from the guide plate (62).

4. The shift fork device for the transmission gear according to claim 2, characterized in that: The limiting mechanism (6) also includes an L-shaped handle (64) hinged to the inclined rod. The end of the pin (61) away from the sleeve (4) is fixedly connected to a steel wire rope (63), and the other end of the steel wire rope (63) is fixedly set at the corner of the L-shaped handle (64).

5. The shift fork device for the transmission gear according to claim 1, characterized in that: The main shaft (21) has several grooves (22) arranged in a ring. The inner circumference of the drive gear (5) is fixedly connected with several sliders (51) in a ring array. The sliders (51) are respectively slidably arranged inside the grooves (22).

6. The shift fork device for the transmission gear according to claim 1, characterized in that: The end of the guide post (3) away from the assembly frame (1) is coaxially fixedly connected to an end plate (31), and the diameter of the end plate (31) is larger than the diameter of the guide post (3).

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