Safety lever mechanism of switch machine

Abstract

The invention discloses a safety lever mechanism of a switch machine. The safety lever mechanism comprises a lever stick, a handle spring seat, a handle shaft sleeve, a cam clutch plate, a clutch sliding block, a cam, a lever main shaft and a tail end meshing gear. The pulling rod is fixedly connected with the handle spring seat, and the handle shaft sleeve is located outside the handle spring seat and the clutch sliding block. The cam clutch plate and the cam are sequentially connected to the outer side of the hand-operated main shaft in a sleeved mode, the cam clutch plate and the hand-operated main shaft are fixedly connected together, the cam is fixedly connected with the machine shell, and the other end of the hand-operated main shaft is provided with a tail end meshing gear. A cam clutch plate clamping groove is formed in the outer edge of the cam clutch plate, a cam sliding groove is formed in the side, close to the cam clutch plate, of the cam, and the longitudinal section of the clutch sliding block is in a step shape. According to the hand pulling mechanism of the electric switch machine special for turning of the vehicle, the pulling rod handle is adopted for driving, clutch control is carried out through the cam inserting groove, meanwhile, the end face cam travel switch is installed, double safety measures of a mechanical structure and a circuit are achieved, and reliability is high.

Description

Technical Field

[0001] The invention belongs to the technical field of railway traffic equipment, and in particular relates to a safety hand-operated mechanism for a switch machine. Background Art

[0002] The hand-operated mechanism of the electric switch machine used for train transfer in factory and mine railway transportation has the functions of manually changing the direction of the switch, locking the switch point rail, protecting the operator and the switch machine, etc., which is directly related to driving safety.

[0003] Most of the existing hand-operated mechanisms of electric switch machines use a hand crank that fits the tail shaft end of the switch machine motor, and drives the motor and reducer by hand cranking instead of electric drive to realize the movement of the switch machine. This type of hand cranking is slow to operate and has low rotation efficiency. It generally only relies on the travel switch as a safety protection mode, which has low safety and high workload. In addition, there is another type of hand-operated mechanism of the electric switch machine that uses a direct connection with the locking gear to directly drive the switch machine to move through a lever. This type of structure also only uses the on and off of the travel switch to isolate the circuit, which has low rotation efficiency and is still not very safe. Summary of the invention

[0004] In order to solve the above technical problems, the present invention provides a safe hand-operated mechanism for a switch machine, comprising a lever, a handle spring seat, a handle sleeve, a cam clutch plate, a clutch slider, a cam, a hand-operated main shaft and an end meshing gear; the lever is fixedly connected to the handle spring seat, a clutch spring is provided between the handle spring seat and the clutch slider, and the handle sleeve is located on the outside of the handle spring seat and the clutch slider; the cam clutch plate and the cam are both circular rings, which are sequentially sleeved on the outside of the hand-operated main shaft, the cam clutch plate is fixedly connected to the hand-operated main shaft, the cam is fixedly connected to the casing, and the other end of the hand-operated main shaft is provided with an end meshing gear; a cam clutch plate slot is provided on the outer edge of the cam clutch plate, a cam slide groove is provided on the side of the cam close to the cam clutch plate, and the outer diameter of the part of the cam outside the cam slide groove is larger than the outer diameter of the cam clutch plate; the longitudinal cross-section of the clutch slider is step-shaped, and the step surfaces correspond to the cam clutch plate and the cam respectively.

[0005] Preferably, the safety hand-operated mechanism of the switch machine also includes an end cam plate, a switch top pin, a switch return spring, and a travel switch. The end cam plate is fixedly connected to the handle sleeve; the end cam plate is in a circular ring shape, sleeved on the outer side of the hand-operated main shaft, and concentric with the hand-operated main shaft. An end cam plate slide groove is provided on the side of the end cam plate close to the travel switch, the switch top pin is connected to one end of the switch return spring, and the other end of the switch return spring is located on the travel switch. Under the action of the switch return spring, the travel switch is separated from the end of the switch top pin.

[0006] Preferably, the shape and size of the cam clutch plate slot are matched with the end of the clutch slider.

[0007] Preferably, the portion of the cam outside the cam groove on one side of the cam clutch plate is a clutch surface, and the height difference between the clutch surface and the bottom of the cam clutch plate groove is greater than the height difference of the step surface.

[0008] Preferably, the central angle of the cam groove is 155°.

[0009] Preferably, it also includes a switch pin shaft sleeve, which is fixedly connected to the casing; the switch top pin is located in the switch pin shaft sleeve, and the two are movably connected.

[0010] Preferably, a transition surface is provided between the end cam plate slide groove and other parts of the end cam plate.

[0011] Preferably, the bottom of the end face cam plate slide groove is a plane.

[0012] Preferably, the central angle of the end cam plate slot is 190°.

[0013] Preferably, it also includes a lock, which is arranged at an end of the wrench away from the handle spring seat.

[0014] In view of the existing hand-pull mechanism of the electric switch machine used for railway vehicle switching in factory and mine transportation, the present invention provides a hand-pull mechanism for the electric switch machine used for vehicle switching, which is driven by a lever handle and clutch-controlled by a cam slot. At the same time, an end face cam travel switch is installed to realize dual safety measures of mechanical structure and circuit, and has high reliability. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The technical solution of the present invention will be further described below in conjunction with the accompanying drawings:

[0016] Figure 1 It is a schematic diagram of the overall structure of the safety hand-operated mechanism of the switch machine of the present invention.

[0017] Figure 2 It is a cross-sectional schematic diagram of the safety hand-operated mechanism of the switch machine of the present invention.

[0018] Figure 3 It is a schematic diagram of the hand-operated mechanism travel switch assembly.

[0019] Figure 4 This is the main view of the hand-operated spindle.

[0020] Figure 5 It is an isometric view of the safety hand-operated mechanism (without the handle sleeve) of the switch machine of the present invention.

[0021] Figure 6 It is a side view of the safety hand-operated mechanism (without the handle sleeve) of the switch machine of the present invention.

[0022] Figure 7 It is an axonometric view of the safety hand-operated mechanism of the switch machine of the present invention (with the clutch slider removed).

[0023] Figure 8 It is a side view of the safety hand-operated mechanism of the switch machine of the present invention (with the clutch slider removed).

[0024] Fig. 9 It is an axonometric view of the safety hand-operated mechanism of the switch machine of the present invention from another viewing angle.

[0025] Fig.10 It is a structural schematic diagram of the end face cam plate.

[0026] In the figure: 1. Lock assembly; 2. Lashing stick; 3. Handle shaft sleeve; 4. Hand lever spindle; 5. Travel switch assembly; 6. End meshing gear; 7. Handle spring seat; 8. Clutch slider; 9. Cam clutch plate; 10. Cam; 11. End cam plate; 12. Switch top pin; 13. Switch pin shaft sleeve; 14. Switch return spring; 15. Travel switch; 16. Clutch spring; 17. Cam clutch plate slot; 18. Cam slide groove; 19. Clutch surface; 20. Transition surface; 21. End cam plate slide groove. DETAILED DESCRIPTION

[0027] The technical scheme of the present invention will be clearly and completely described below in conjunction with specific embodiments, but those skilled in the art should understand that the embodiments described below are only used to illustrate the present invention and should not be regarded as limiting the scope of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0028] like Figure 1-10 As shown, the present invention discloses a safety hand lever mechanism for a switch machine, comprising a lock buckle 1, a lever 2, a handle spring seat 7, a handle sleeve 3, a cam clutch plate 9, a clutch slider 8, an end cam plate 11, a cam 10, a travel switch 15, a hand lever main shaft 4 and an end meshing gear 6.

[0029] The lever 2 is fixedly connected to the handle spring seat 7, the handle spring seat 7 is located at the top of the clutch slider 8, and a clutch spring 16 is provided between the handle spring seat 7 and the clutch slider 8; the handle sleeve 3 is located on the outside of the handle spring seat 7 and the clutch slider 8; the cam clutch plate 9 is annular, the cam clutch plate 9 is sleeved on the outside of the hand lever main shaft 4, the cam clutch plate 9 and the hand lever main shaft 4 are fixedly connected together, and a cam clutch plate slot 17 is provided on the outer edge of the cam clutch plate 9; the shape and size of the cam clutch plate slot 17 are adapted to the end of the clutch slider 8, and the clutch slider 8 enters the cam clutch plate slot 17 under the elastic force of the clutch spring 16, and the end of the clutch slider 8 is stuck in the cam clutch plate slot 17, driving the hand lever main shaft 4 to rotate; the cam 10 is located on the side of the cam clutch plate 9 close to the end meshing gear 6 The cam 10 is fixedly connected to the casing, and the cam 10 is sleeved on the outside of the hand-operated main shaft 4. The cam 10 is a circular ring. A cam groove 18 is provided on the side of the cam 10 close to the cam clutch plate 9. The part of the cam 10 outside the cam groove 18 on the side of the cam 10 close to the cam clutch plate 9 is a clutch surface 19, and the outer diameter of the clutch surface 19 is larger than the diameter of the cam clutch plate 9; the cross-section of the clutch slider 8 cut by the plane passing through the axis of the hand-operated main shaft 4 is a step-shaped section. When the hand-operated main shaft 4 rotates, the lower end of the step surface contacts the bottom of the cam clutch plate slot 17, and the height difference between the clutch surface 19 and the bottom of the cam clutch plate slot 17 is greater than the height difference of the step surface. When the hand-operated main shaft 4 rotates, the high end of the step surface contacts the clutch surface 19, the clutch slider 8 is lifted, and it is out of contact with the cam clutch plate 9, and the hand-operated main shaft 4 stops rotating. The other end of the hand lever main shaft 4 is provided with an end meshing gear 6. The rotation of the hand lever main shaft 4 drives the end meshing gear 6 to rotate, and the conversion gear rotates by meshing with the bevel gear on the conversion gear, thereby moving the rack and driving the action rod to move.

[0030] The end cam plate 11 is fixedly connected to the handle sleeve 3 by bolts. When the handle sleeve 3 rotates, the end cam plate 11 rotates synchronously. The end cam plate 11 is a circular ring and is located on the outside of the hand lever main shaft 4 and is concentric with the hand lever main shaft 4. The side of the end cam plate 11 close to the cam clutch plate 9 is a flat surface, and the side of the end cam plate 11 close to the travel switch 15 is a step surface. The thickness of one section of the circular ring of the end cam plate 11 is less than the thickness of other sections of the circular ring. The thin section forms an end cam plate slide groove 21, and a transition surface 20 is provided between the two. The switch top pin 12 is located in the switch pin shaft sleeve 13, and the two are movably connected. The switch pin shaft sleeve 13 is fixed to the casing; the end cam plate 11 rotates, and the transition surface 20 presses on the end of the switch top pin 12. The switch top pin 12 compresses the switch return spring 14, and the end of the switch top pin 12 close to the travel switch 15 contacts the travel switch 15, so that the contacts of the travel switch 15 are disconnected; as the end cam plate 11 rotates, the thick section of the ring always presses on the switch top pin 12, and the contacts of the travel switch 15 remain disconnected; when the end cam plate slide groove 21 is opposite to the switch top pin 12, the switch top pin 12 is disengaged from the end cam plate 11, the switch top pin 12 retracts, the contacts of the travel switch 15 are closed, and the circuit is locked.

[0031] Working principle of the present invention:

[0032] When the hand-operated switch machine is needed, unlock the lever lock 1, pull the lever 2, the handle sleeve 3 and the inner clutch slider 8 are always integrated and synchronized, and the end cam plate 11 disconnects the contact of the travel switch 15 inside the casing through the spring compression push rod, and completes the circuit unlocking. The handle sleeve 3 drives the clutch slider 8 to rotate around the hand-operated main shaft 4, and at the same time, the clutch slider 8 and the cam clutch plate 9 form a cam motion. The cam clutch plate 9 is fixedly connected to the hand-operated main shaft 4 as a whole. After rotating about 15°, under the push of the spring, the clutch slider 8 falls relative to the cam clutch plate 9 and inserts into the cam clutch plate slot 17. At this time, the handle sleeve 3 and the hand-operated main shaft 4 are combined through the clutch slider 8 to form a whole, thereby driving the hand-operated main shaft 4 to rotate, and transmitting to the hand-operated main shaft 4 inside the switch machine to drive the bevel gear to rotate, and the conversion gear is rotated by meshing with the bevel gear on the conversion gear, so that the rack moves and drives the action rod to move. When the rotation is about 170°, the switching action of the switch action rod is completed, the clutch slider 8 reaches the edge of the cam slot 18, and the clutch slider 8 is lifted up by the clutch surface 19 of the cam 10, and the handle sleeve 3 is separated from the inner clutch slider 8 and the cam clutch plate 9. At the same time, the end face cam plate slot 21 closes the contact of the travel switch push rod inside the casing through the spring compression force, and the circuit is locked. When the rotation is about 180°, the trigger is reset and locked.

[0033] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A safe hand-operated mechanism for a switch machine, characterized in that: The invention comprises a lever (2), a handle spring seat (7), a handle shaft sleeve (3), a cam clutch plate (9), a clutch slider (8), a cam (10), a hand lever main shaft (4) and a terminal meshing gear (6); the lever (2) is fixedly connected to the handle spring seat (7), a clutch spring (16) is arranged between the handle spring seat (7) and the clutch slider (8), and the handle shaft sleeve (3) is located outside the handle spring seat (7) and the clutch slider (8); the cam clutch plate (9) and the cam (10) are both annular and are sequentially sleeved on the outside of the hand lever main shaft (4). The cam clutch plate (9) is fixedly connected to the hand lever main shaft (4), the cam (10) is fixedly connected to the housing, and the other end of the hand lever main shaft (4) is provided with an end meshing gear (6); a cam clutch plate slot (17) is provided on the outer edge of the cam clutch plate (9), and a cam slide groove (18) is provided on the side of the cam (10) close to the cam clutch plate (9), and the outer diameter of the cam (10) is larger than the outer diameter of the cam clutch plate (9); the longitudinal section of the clutch slider (8) is step-shaped, and the step surfaces correspond to the cam clutch plate (9) and the cam (10) respectively.

2. The safety hand-operated mechanism of the switch machine according to claim 1, characterized in that: The utility model also comprises an end cam plate (11), a switch top pin (12), a switch return spring (14), and a travel switch (15). The end cam plate (11) is fixedly connected to the handle shaft sleeve (3); the end cam plate (11) is annular, sleeved on the outer side of the hand lever main shaft (4), and is concentric with the hand lever main shaft (4); an end cam plate slide groove (21) is provided on the side of the end cam plate (11) close to the travel switch (15); the switch top pin (12) is connected to one end of the switch return spring (14), and the other end of the switch return spring (14) is located on the travel switch (15).

3. The safety hand-operated mechanism of the switch machine according to claim 1, characterized in that: The shape and size of the cam clutch plate slot (17) are matched with the end of the clutch slider (8).

4. The safety hand-operated mechanism of the switch machine according to claim 1, characterized in that: The height difference between the top of the cam (10) and the bottom of the cam clutch plate slot (17) is greater than the height difference of the step surface.

5. The safety hand-operated mechanism of the switch machine according to claim 4, characterized in that: The central angle of the cam sliding groove (18) is 155°.

6. The safety hand-operated mechanism of the switch machine according to claim 2, characterized in that: It also includes a switch pin shaft sleeve (13), which is fixedly connected to the housing; the switch top pin (12) is located in the switch pin shaft sleeve (13), and the two are movably connected.

7. The safety hand-operated mechanism of the switch machine according to claim 2, characterized in that: A transition surface (20) 20 is provided between the end face cam plate slide groove (21) and other parts of the end face cam plate (11).

8. The safety hand-operated mechanism of the switch machine according to claim 2, characterized in that: The bottom of the end face cam plate slide groove (21) is a plane.

9. The safety hand-operated mechanism of a switch machine according to claim 2, characterized in that: The center angle of the end face cam plate slide groove (21) is 190°.

10. The safety hand-operated mechanism of a switch machine according to claim 1, characterized in that: It also comprises a lock buckle (1), which is arranged at one end of the wrench (2) away from the handle spring seat (7).

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