Double bolt blocking device

Abstract

The utility model provides a kind of double bolt formula blocking device, comprising: bolt, bolt limiting mechanism, base, safety lock disc, lock disc connecting block, shaft end cover plate;The base is used to install in car top;Two bolts are installed side by side in base, and the bolt can move back and forth in base;The bolt limiting mechanism is used to make the bolt can be caught when being in extended position or retracted position;Safety lock disc, lock disc connecting block and shaft end cover plate are equipped with in the front of base;The outer periphery of the safety lock disc is equipped with a plurality of blocking teeth, and blocking teeth gap is equipped with between adjacent blocking teeth;The lock disc connecting block is connected in the side of safety lock disc towards pivot;Shaft hole for the pivot to pass in is equipped with in lock disc connecting block, and lock disc connecting block is used to connect pivot;Shaft end cover plate is arranged in the side of safety lock disc away from pivot;Shaft end cover plate is used to connect the end of pivot.The utility model guarantees that at least one bolt can be extended to catch safety lock disc.

Description

Technical Field

[0001] This utility model relates to safety devices for hoists, and in particular to a double-pin type blocking device. Background Technology

[0002] During maintenance or repair of the hoist, it is necessary to prevent the car from falling abnormally to avoid danger to maintenance personnel. The currently used blocking device is a single-pin type blocking device; however, the single pin is prone to interference with the stop teeth on the safety lock disc, preventing the single pin from extending and inserting into the gap between the stop teeth on the safety lock disc. Summary of the Invention

[0003] To address the shortcomings of existing technologies, this utility model provides a double-pin blocking device that ensures at least one pin can extend to engage the safety lock disc. To achieve the above technical objectives, the technical solution adopted in this utility model embodiment is as follows: This utility model embodiment provides a double pin-type blocking device, including: a pin, a pin limiting mechanism, a base, a safety lock disc, a lock disc connecting block, and a shaft end cover plate; The base is used to be installed on the top of the car; two pins are installed side by side in the base, and the pins can move back and forth in the base; the pin limiting mechanism is used to lock the pins when they are in the extended or retracted position. A safety lock disc, a lock disc connecting block, and a shaft end cover are provided at the front of the base; The outer periphery of the safety lock disc is provided with multiple retaining teeth, and there is a gap between adjacent retaining teeth; the lock disc connecting block is connected to the side of the safety lock disc facing the rotating shaft; the lock disc connecting block is provided with a shaft hole in the middle for the rotating shaft to pass through, and the lock disc connecting block is used to connect the rotating shaft; the shaft end cover plate is provided on the side of the safety lock disc away from the rotating shaft; the shaft end cover plate is used to connect the end of the rotating shaft and to prevent the lock disc connecting block and the safety lock disc from disengaging from the rotating shaft.

[0004] Furthermore, the pin limiting mechanism includes a limiting post connected to the top of the pin and a sliding groove provided on the top of the base, with limiting holes at the front and rear ends of the sliding groove respectively; the limiting post includes a sleeve, a body and a spring, the body is disposed in the sleeve, the lower end of the body extends out of the sleeve and connects to the top of the pin, the spring is located in the sleeve and sleeved on the body, the upper end of the spring abuts against the top cap of the body and the lower end abuts against the bottom of the sleeve; The groove is adapted to the column body of the limiting post, and the limiting hole is adapted to the column sleeve of the limiting post.

[0005] Furthermore, the inner wall of the shaft hole of the locking disc connecting block is provided with a keyway, so that the locking disc connecting block can be connected to the rotating shaft by a flat key.

[0006] Furthermore, the lock disc connecting block has an annular boss at one end facing the safety lock disc, and a first internal thread hole is provided on the bottom end face of the annular boss of the lock disc connecting block; the safety lock disc has a central hole and is fitted onto the annular boss of the lock disc connecting block, and is connected to the first internal thread hole on the bottom end face of the annular boss of the lock disc connecting block by a bolt passing through the safety lock disc.

[0007] Furthermore, the diameter of the shaft end cover is larger than the diameter of the shaft hole.

[0008] Furthermore, the locking disc connecting block is provided with a second internal threaded hole facing the keyway, and a bolt is passed through the second internal threaded hole to lock the flat key in the keyway.

[0009] Furthermore, the locking disc connecting block is also provided with a third internal threaded hole facing the shaft hole, and the rotating shaft a is locked by passing a bolt through the third internal threaded hole.

[0010] Furthermore, each pin has an annular groove, and a proximity switch is connected to each side of the base.

[0011] The beneficial effects of the technical solution provided by this utility model embodiment are: 1) It is equipped with two pins installed side by side, and either pin can extend to lock the safety lock disc; this avoids the problem of a single pin easily interfering with the stop teeth on the safety lock disc.

[0012] 2) The safety lock disc and the lock disc connecting block are firmly connected; and if the safety lock disc wears out after long-term use, it is easy to replace.

[0013] 3) The locking disc connecting block and the rotating shaft are connected by a flat key, which is simple in structure and easy to disassemble and assemble.

[0014] 4) The pin can be locked in the extended position by the pin limiting mechanism to prevent accidental operation by others and improve safety. Attached Figure Description

[0015] Figure 1 This is a front view of the double-pin blocking device in an embodiment of this utility model.

[0016] Figure 2 This is a top view of the double-pin blocking device in an embodiment of the present utility model.

[0017] Figure 3 This is a perspective view of the connection between the double-pin type blocking device and the rotating shaft in an embodiment of this utility model.

[0018] Figure 4 This is a schematic diagram of the lock disc connecting block structure in an embodiment of the present utility model. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain this utility model and are not intended to limit this utility model.

[0020] like Figure 1 , Figure 2 and Figure 3 As shown in the figure, the present invention provides a double pin type blocking device, which includes: a pin 1, a pin limiting mechanism, a base 3, a safety lock disc 4, a lock disc connecting block 5, and a shaft end cover plate 6. The base 3 is used to be installed on the top of the car; two pins 1 are installed side by side in the base 3, and the pins 1 can move back and forth in the base 3; the pin limiting mechanism is used to make the pins 1 be locked when they are in the extended position or the retracted position. A safety lock disc 4, a lock disc connecting block 5, and a shaft end cover plate 6 are provided in front of the base 3; The safety lock disc 4 has multiple retaining teeth 401 on its outer periphery, and a tooth gap 402 is provided between adjacent retaining teeth 401; the lock disc connecting block 5 is connected to the side of the safety lock disc 4 facing the rotating shaft a; the lock disc connecting block 5 has a shaft hole 501 in the middle for the rotating shaft a to pass through, and the lock disc connecting block 5 is used to connect the rotating shaft a; the shaft end cover plate 6 is provided on the side of the safety lock disc 4 away from the rotating shaft a; the shaft end cover plate 6 is used to connect the end of the rotating shaft a and to prevent the lock disc connecting block 5 and the safety lock disc 4 from disengaging from the rotating shaft a.

[0021] Specifically, the pin limiting mechanism includes a limiting post 2 connected to the top of the pin 1 and a sliding groove 301 set on the top of the base 3. The front and rear ends of the sliding groove 301 are respectively provided with limiting holes 302. The limiting post 2 includes a post sleeve 201, a post body 202 and a spring 203. The post body 202 is set in the post sleeve 201. The lower end of the post body 202 extends out of the post sleeve 201 and is connected to the top of the pin 1. The spring 203 is located in the post sleeve 201 and is sleeved on the post body 202. The upper end of the spring 203 abuts against the top cap of the post body 202 and the lower end abuts against the bottom of the post sleeve 202. The sliding groove 301 is adapted to the column body 202 of the limiting post 2, and the limiting hole 302 is adapted to the column sleeve 201 of the limiting post 2.

[0022] like Figure 3As shown, the rotating shaft a is also mounted on the top of the car via the shaft seat b; the rotating shaft a is driven by a drive motor, and a sprocket is also provided on the rotating shaft a. When it is necessary to block the rotation of the safety lock disc 4 by using the pin 1, select any pin 1 that can avoid the stop teeth 401 on the safety lock disc 4, pull out the sleeve 201 of the top limiting post 2 of the pin 1, the post body 202 of the limiting post 2 can slide in the corresponding slide groove 301 on the top of the base 3, so the pin 1 can be extended and inserted into the gap 402 between the stop teeth on the safety lock disc 4; locking the safety lock disc 4 to achieve the locking function. When the sleeve 201 of the limiting post 2 is pulled out, the spring 203 inside the sleeve 201 is compressed. When the pin 1 is extended to the end, the sleeve 201 of the limiting post 2 is released. Under the elastic force of the spring 203, the sleeve 201 of the limiting post 2 is inserted into the limiting hole 302 at the front end of the slide groove 301, and the pin 1 is locked in the extended position.

[0023] When it is necessary to retract the pin 1, pull up the sleeve 201 of the top limiting post 2 of the pin 1. The post 202 of the limiting post 2 can slide in the corresponding groove 301 on the top of the base 3, thus retracting the pin 1. When the sleeve 201 of the limiting post 2 is pulled up, the spring 203 of the sleeve 201 is compressed. After the pin 1 is retracted, release the sleeve 201 of the limiting post 2. Under the elastic force of the spring 203, the sleeve 201 of the limiting post 2 is engaged in the limiting hole 302 at the rear end of the groove 301, and the pin 1 is locked in the retracted position, releasing the locking function of the safety lock disc 4.

[0024] like Figure 4 As shown, specifically, the inner wall of the shaft hole 501 of the locking disc connecting block 5 is provided with a keyway 502, so that the locking disc connecting block 5 can be connected to the rotating shaft a by a flat key.

[0025] Furthermore, the locking disc connecting block 5 has an annular boss 503 at one end facing the safety locking disc 4, and a first internal threaded hole 504 is provided on the bottom end face of the annular boss 503 of the locking disc connecting block 5; the safety locking disc 4 has a central hole and is sleeved on the annular boss 503 of the locking disc connecting block 5, and is connected to the first internal threaded hole 504 on the bottom end face of the annular boss 503 of the locking disc connecting block 5 by bolts passing through the safety locking disc 4; so that the safety locking disc 4 and the locking disc connecting block 5 are firmly connected.

[0026] Furthermore, the diameter of the shaft end cover plate 6 is larger than the diameter of the shaft hole 501; so as to prevent the lock disc connecting block 5 from disengaging from the rotating shaft a, and also to prevent the safety lock disc 4 connected to the lock disc connecting block 5 from disengaging from the rotating shaft a.

[0027] Furthermore, the locking disc connecting block 5 is provided with a second internal threaded hole 505 facing the keyway 502, and the flat key in the keyway 502 is locked by passing a bolt through the second internal threaded hole 505.

[0028] Furthermore, the locking disc connecting block 5 is also provided with a third internal threaded hole 506 facing the shaft hole 501, and the rotating shaft a is locked by passing a bolt through the third internal threaded hole 506.

[0029] Furthermore, each latch 1 is provided with an annular groove 101, and a proximity switch 7 is connected to each side of the base 3. By detecting whether the proximity switch 7 is aligned with the annular groove 101 on the latch 1, it can be determined whether the latch 1 is in the extended or retracted position. In this embodiment, when the proximity switch 7 is aligned with the annular groove 101 on the latch 1, that is, when the proximity switch 7 detects an empty space, it is determined that the latch 1 is in the extended position. This allows the host computer to determine the position of the latch 1, preventing the car from being accidentally started during maintenance.

[0030] Finally, it should be noted that the above specific embodiments are only used to illustrate the technical solution of this utility model and not to limit it. Although this utility model has been described in detail with reference to the embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solution of this utility model without departing from the spirit and scope of the technical solution of this utility model, and all such modifications and substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A double-pin type blocking device, characterized in that, include: Pin (1), pin limiting mechanism, base (3), safety lock disc (4), lock disc connecting block (5), shaft end cover (6); The base (3) is used to be installed on the top of the car; two pins (1) are installed side by side in the base (3), and the pins (1) can move back and forth in the base (3); the pin limiting mechanism is used to make the pins (1) be locked when they are in the extended position or the retracted position; A safety lock disc (4), a lock disc connecting block (5), and a shaft end cover plate (6) are provided in front of the base (3); The outer periphery of the safety lock disc (4) is provided with multiple retaining teeth (401), and there is a tooth gap (402) between adjacent retaining teeth (401); the lock disc connecting block (5) is connected to the side of the safety lock disc (4) facing the rotating shaft (a); the lock disc connecting block (5) is provided with a shaft hole (501) in the middle for the rotating shaft (a) to pass through, and the lock disc connecting block (5) is used to connect the rotating shaft (a); the shaft end cover plate (6) is provided on the side of the safety lock disc (4) away from the rotating shaft (a); the shaft end cover plate (6) is used to connect the end of the rotating shaft (a) and to prevent the lock disc connecting block (5) and the safety lock disc (4) from disengaging from the rotating shaft (a).

2. The double-pin type blocking device as described in claim 1, characterized in that, The pin limiting mechanism includes a limiting post (2) connected to the top of the pin (1) and a sliding groove (301) set on the top of the base (3). The front and rear ends of the sliding groove (301) are respectively provided with limiting holes (302). The limiting post (2) includes a sleeve (201), a body (202) and a spring (203). The body (202) is set in the sleeve (201). The lower end of the body (202) extends out of the sleeve (201) and is connected to the top of the pin (1). The spring (203) is located in the sleeve (201) and sleeved on the body (202). The upper end of the spring (203) abuts against the top cap of the body (202) and the lower end abuts against the bottom of the sleeve (201). The groove (301) is adapted to the column (202) of the limiting post (2), and the limiting hole (302) is adapted to the sleeve (201) of the limiting post (2).

3. The double-pin type blocking device as described in claim 1, characterized in that, The inner wall of the shaft hole (501) of the locking disc connecting block (5) is provided with a keyway (502) so that the locking disc connecting block (5) can be connected to the rotating shaft (a) by a flat key.

4. The double-pin type blocking device as described in claim 1, characterized in that, The locking disc connecting block (5) has an annular boss (503) at one end facing the safety locking disc (4), and a first internal thread hole (504) is provided on the bottom end face of the annular boss (503) of the locking disc connecting block (5); the safety locking disc (4) has a central hole and is sleeved on the annular boss (503) of the locking disc connecting block (5), and is connected to the first internal thread hole (504) on the bottom end face of the annular boss (503) of the locking disc connecting block (5) by bolts passing through the safety locking disc (4).

5. The double-pin type blocking device as described in claim 1, characterized in that, The diameter of the shaft end cover (6) is larger than the diameter of the shaft hole (501).

6. The double-pin type blocking device as described in claim 1, characterized in that, The locking disc connecting block (5) is provided with a second internal threaded hole (505) facing the keyway (502), and the flat key in the keyway (502) is locked by passing a bolt through the second internal threaded hole (505).

7. The double-pin type blocking device as described in claim 1, characterized in that, The locking disc connecting block (5) is also provided with a third internal threaded hole (506) facing the shaft hole (501), and the rotating shaft (a) is locked by passing a bolt through the third internal threaded hole (506).

8. The double-pin type blocking device as described in claim 1, characterized in that, Each pin (1) has an annular groove (101), and a proximity switch (7) is connected to each side of the base (3).

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