Safety hand-operated mechanism for a switch machine

Abstract

The application discloses a safety type hand pulling mechanism of a switch machine, which comprises a pulling stick, a handle spring seat, a handle shaft sleeve, a cam clutch plate, a clutch sliding block, a cam, a hand pulling main shaft and a terminal meshing gear; the pulling stick is fixedly connected with the handle spring seat; 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 sleeved outside the hand pulling main shaft; the cam clutch plate is fixedly connected with the hand pulling main shaft; the cam is fixedly connected with a machine shell; the other end of the hand pulling main shaft is provided with the terminal meshing gear; the outer edge of the cam clutch plate is provided with a cam clutch plate clamping groove; the cam is provided with a cam sliding groove on the side close to the cam clutch plate; and the longitudinal section of the clutch sliding block is in a stepped shape. The application is used for the hand pulling mechanism of the electric switch machine special for train switching, adopts the pulling stick handle driving, realizes the clutch control through the cam insertion groove, simultaneously installs the end face cam travel switch, realizes the mechanical structure and the circuit double safety measures, and is high in reliability.

Description

Technical Field

[0001] This invention belongs to the field of railway transportation equipment technology, and specifically relates to a safety lever mechanism for a switch machine. Background Technology

[0002] The manual lever mechanism of the special electric switch machine for turning trains in industrial and mining railway transportation has functions such as manually changing the direction of the turnout, locking the turnout switch rail, and protecting the operator and the switch machine, which are directly related to the safety of train operation.

[0003] Most existing electric switch machine hand lever mechanisms use a hand crank that engages with the tail shaft of the switch machine motor. The motor and reducer are driven manually, replacing electric drive, to operate the switch machine. This manual method is slow, inefficient, and generally relies solely on limit switches for safety, resulting in low safety and high workload. Another type of electric switch machine hand lever mechanism uses a direct connection to a locking gear, driving the switch machine directly with a lever. This type also relies solely on limit switches to isolate the circuit, resulting in low efficiency and still insufficient safety. Summary of the Invention

[0004] To solve the above-mentioned technical problems, the present invention provides a safety-type hand lever mechanism for a switch machine, including a lever, a handle spring seat, a handle bushing, a cam clutch plate, a clutch slider, a cam, a hand lever main shaft, and an end engagement 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 bushing is located outside the handle spring seat and the clutch slider; both the cam clutch plate and the cam are annular and are sequentially sleeved on the outside of the hand lever main shaft, the cam clutch plate is fixedly connected to the hand lever main shaft, the cam is fixedly connected to the machine housing, and the other end of the hand lever main shaft is provided with an end engagement gear; the outer edge of the cam clutch plate is provided with a cam clutch plate groove, and the side of the cam near the cam clutch plate is provided with a cam groove, the outer diameter of the part of the cam outside the cam groove is larger than the outer diameter of the cam clutch plate; the longitudinal section of the clutch slider is stepped, and the stepped surfaces correspond to the cam clutch plate and the cam respectively.

[0005] Preferably, the safety lever mechanism of the switch machine further includes an end face cam plate, a switch top pin, a switch return spring, and a limit switch. The end face cam plate is fixedly connected to the handle bushing. The end face cam plate is annular and is sleeved on the outside of the lever main shaft, concentric with the lever main shaft. The end face cam plate has an end face cam plate groove on the side near the limit 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 limit switch. Under the action of the switch return spring, the limit switch is separated from the end of the switch top pin.

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

[0007] Preferably, the part of the cam outside the cam groove on the side of the cam near the cam clutch plate is the 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 sleeve, which is fixedly connected to the housing; the switch top pin is located inside the switch pin sleeve, and the two are movably connected.

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

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

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

[0013] Preferably, it also includes a locking mechanism located at the end of the lever away from the handle spring seat.

[0014] In view of the existing hand lever mechanism of electric switch machine for railway vehicle transfer in factories and mines, the present invention provides a hand lever mechanism for electric switch machine for vehicle transfer. It is driven by a lever handle, and the clutch is controlled by a cam slot. At the same time, an end face cam limit switch is installed to realize dual safety measures of mechanical structure and circuit, and the reliability is high. Attached Figure Description

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

[0016] Figure 1 This is a schematic diagram of the overall structure of the safety lever mechanism of the switch machine of the present invention.

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

[0018] Figure 3 This is a schematic diagram of the limit switch assembly of the lever mechanism.

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

[0020] Figure 5 This is an isometric view of the safety lever mechanism (with handle bushing removed) of the switch machine of the present invention.

[0021] Figure 6 This is a side view of the safety lever mechanism (with the handle bushing removed) of the switch machine of the present invention.

[0022] Figure 7 This is an isometric view of the safety lever mechanism (without the clutch slider) of the switch machine of the present invention.

[0023] Figure 8 This is a side view of the safety lever mechanism (without the clutch slider) of the switch machine of the present invention.

[0024] Figure 9 This is an axonometric view of the safety lever mechanism of the switch machine of the present invention from another perspective.

[0025] Figure 10 This is a schematic diagram of the end face cam plate.

[0026] In the diagram: 1. Locking assembly; 2. Lever; 3. Handle bushing; 4. Hand lever spindle; 5. Limit switch assembly; 6. End engagement gear; 7. Handle spring seat; 8. Clutch slider; 9. Cam clutch plate; 10. Cam; 11. End face cam plate; 12. Switch top pin; 13. Switch pin bushing; 14. Switch return spring; 15. Limit switch; 16. Clutch spring; 17. Cam clutch plate slot; 18. Cam groove; 19. Clutch surface; 20. Transition surface; 21. End face cam plate groove. Detailed Implementation

[0027] The technical solution of the present invention will be clearly and completely described below with reference to specific embodiments. However, those skilled in the art should understand that the embodiments described below are only for illustrating 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 those skilled in the art without creative effort are within the scope of protection of the present invention.

[0028] like Figure 1-10 As shown, the present invention discloses a safety lever mechanism for a switch machine, including a latch 1, a lever 2, a handle spring seat 7, a handle bushing 3, a cam clutch plate 9, a clutch slider 8, an end face cam plate 11, a cam 10, a limit switch 15, a lever spindle 4, and an end meshing gear 6.

[0029] The lever 2 is fixedly connected to the handle spring seat 7, which is located at the top of the clutch slider 8. A clutch spring 16 is provided between the handle spring seat 7 and the clutch slider 8. The handle bushing 3 is located outside the handle spring seat 7 and the clutch slider 8. The cam clutch plate 9 is annular and is 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 outer edge of the cam clutch plate 9 is provided with a cam clutch plate groove 17. The shape and size of the cam clutch plate groove 17 are adapted to the end of the clutch slider 8. Under the elastic force of the clutch spring 16, the clutch slider 8 enters the cam clutch plate groove 17, and the end of the clutch slider 8 is locked inside the cam clutch plate groove 17, driving the hand lever main shaft 4 to rotate. The cam 10 is located on the side of the cam clutch plate 9 near the end meshing gear 6. The cam 10 is fixedly connected to the housing and is sleeved on the outside of the hand lever spindle 4. The cam 10 is annular and has a cam groove 18 on the side of the cam 10 near the cam clutch plate 9. The part of the cam 10 outside the cam groove 18 on the side of the cam 10 near the cam clutch plate 9 is the clutch surface 19. 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 lever spindle 4 is stepped. When the hand lever spindle 4 rotates, the lower end of the stepped surface contacts the bottom of the cam clutch plate slot 17. 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 stepped surface. When the hand lever spindle 4 rotates, the upper end of the stepped surface contacts the clutch surface 19, the clutch slider 8 is lifted and disengaged from the cam clutch plate 9, and the hand lever spindle 4 stops rotating. The other end of the hand lever spindle 4 is provided with an end meshing gear 6. The rotation of the hand lever spindle 4 drives the end meshing gear 6 to rotate, which meshes with the bevel gear on the conversion gear to make the conversion gear rotate, thereby causing the rack to move and drive the action lever to move.

[0030] The end face cam plate 11 is fixedly connected to the handle bushing 3 by bolts. When the handle bushing 3 rotates, the end face cam plate 11 rotates synchronously. The end face cam plate 11 is annular and located outside the hand lever spindle 4, concentric with the hand lever spindle 4. The side of the end face cam plate 11 near the cam clutch plate 9 is flat, and the side of the end face cam plate 11 near the limit switch 15 is stepped. The thickness of one section of the annular end face cam plate 11 is less than the thickness of other sections of the annular end face cam plate. The thinner section forms the end face cam plate groove 21, and a transition surface 20 is provided between the two. The switch pin 12 is located inside the switch pin sleeve 13, and the two are movably connected. The switch pin sleeve 13 is fixed to the housing. When the end face cam plate 11 rotates, the transition surface 20 presses against the end of the switch pin 12, and the switch pin 12 compresses the switch return spring 14. The end of the switch pin 12 near the limit switch 15 contacts the limit switch 15, causing the contacts of the limit switch 15 to open. As the end face cam plate 11 rotates, the thick section of the ring always presses against the switch pin 12, keeping the contacts of the limit switch 15 open. When the end face cam plate slide groove 21 is opposite to the switch pin 12, the switch pin 12 disengages from the end face cam plate 11, the switch pin 12 retracts, and the contacts of the limit switch 15 close, completing the circuit locking.

[0031] Working principle of the invention:

[0032] When the manual switch machine is needed, unlock lever lock 1, pull lever 2, and the handle bushing 3 and the inner clutch slider 8 are always integrated and synchronized. The end face cam plate 11 disconnects the contacts of the internal limit switch 15 through spring compression of the push rod, thus completing the circuit unlocking. The handle bushing 3 drives the clutch slider 8 to rotate around the main shaft 4 of the hand lever. At the same time, the clutch slider 8 and the cam clutch plate 9 form a cam motion. The cam clutch plate 9 and the main shaft 4 of the hand lever are fixed together. 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 bushing 3 and the main shaft 4 of the hand lever are combined through the clutch slider 8 to form a whole, thereby driving the main shaft 4 of the hand lever to rotate. The transmission to the inside of the switch machine drives the bevel gear to rotate. Through meshing with the bevel gear on the conversion gear, the conversion gear rotates, thereby causing the rack to move and drive the action lever to move. When the switch machine rotates approximately 170°, the switching action is completed, and the clutch slider 8 reaches the edge of the cam groove 18. Under the action of the clutch surface 19 of the cam 10, the clutch slider 8 is lifted, and the handle bushing 3 disengages from the inner clutch slider 8 and the cam clutch plate 9. Simultaneously, the end face cam plate groove 21 closes the contacts of the limit switch push rod inside the housing through spring compression, completing the circuit locking. When the switch machine rotates approximately 180°, the lever resets and locks.

[0033] Finally, it should be noted that the above descriptions are merely preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A safety lever mechanism for a switch machine, characterized in that, The device includes a lever (2), a handle spring seat (7), a handle bushing (3), a cam clutch plate (9), a clutch slider (8), a cam (10), a hand lever main shaft (4), and an end meshing gear (6). The lever (2) is fixedly connected to the handle spring seat (7), and a clutch spring (16) is provided between the handle spring seat (7) and the clutch slider (8). The handle bushing (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 fitted onto the outside of the hand lever main shaft (4). The cam clutch plate (9) is fixedly connected to the hand lever main shaft (4), and the cam (10) is fixedly connected to the housing. The other end of the hand lever main shaft (4) is provided with an end meshing gear (6). The outer edge of the cam clutch plate (9) is provided with a cam clutch plate slot (17), and the cam (10) is close to the... A cam groove (18) is provided on one side of 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 stepped, and the stepped surfaces correspond to the cam clutch plate (9) and the cam (10) respectively. The end face cam plate (11), switch pin (12), switch return spring (14), and limit switch (15) are provided. The end face cam plate (11) is fixedly connected to the handle bushing (3). The end face cam plate (11) is annular and is sleeved on the outside of the hand lever spindle (4) and is concentric with the hand lever spindle (4). The end face cam plate (11) is provided with an end face cam plate groove (21) on the side of the end face cam plate (11) near the limit switch (15). The switch 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 limit switch (15).

2. The safety lever mechanism of the switch machine according to claim 1, characterized in that, The shape and size of the cam clutch plate slot (17) are adapted to the end of the clutch slider (8).

3. The safety lever mechanism for a 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.

4. The safety lever mechanism of the switch machine according to claim 3, characterized in that, The central angle of the cam groove (18) is 155°.

5. The safety lever mechanism of the switch machine according to claim 1, characterized in that, It also includes a switch pin sleeve (13), which is fixedly connected to the housing; the switch top pin (12) is located inside the switch pin sleeve (13), and the two are movably connected.

6. The safety lever mechanism of the switch machine according to claim 1, characterized in that, A transition surface (20) is provided between the end face cam plate groove (21) and other parts of the end face cam plate (11).

7. The safety lever mechanism of the switch machine according to claim 1, characterized in that, The bottom of the end face cam plate groove (21) is a plane.

8. The safety lever mechanism of the switch machine according to claim 1, characterized in that, The central angle of the end face cam plate slide groove (21) is 190°.

9. The safety lever mechanism of the switch machine according to claim 1, characterized in that, It also includes a latch (1), which is located at the end of the lever (2) away from the handle spring seat (7).

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