CN202321858U

CN202321858U - Safe braking device clamped on traction sheave of traction machine

Info

Publication number: CN202321858U
Application number: CN2011204015671U
Authority: CN
Inventors: 曹建文; 曹宇; 沈佳炜; 周卫
Original assignee: SUZHOU TONGRUN DRIVE EQUIPMENT CO Ltd
Current assignee: SUZHOU TONGRUN DRIVE EQUIPMENT CO Ltd; Suzhou Torin Drive Equipment Co Ltd
Priority date: 2011-10-20
Filing date: 2011-10-20
Publication date: 2012-07-11
Anticipated expiration: 2021-10-20

Abstract

The utility model provides a safe braking device clamped on a traction sheave of a traction machine, belonging to the technical field of a safety device of a lift. The traction machine comprises the traction sheave and is characterized in that the safe braking device comprises a jointing seat assembly, a supporting seat, a first pincers body, a second pincers body, a limiting device, a pull spring, a safety switch, and first and second resetting springs, wherein the jointing seat assembly is mounted on the traction machine; the supporting seat is slidingly arranged on a jointing assembly and is limited by first and second resetting pieces; the first pincers body and the second pincers body are respectively mounted at two ends of the supporting seat in the length direction and are used for clamping the traction sheave from two sides of the width direction of the traction sheave; the pull spring is connected between a slide block and the supporting seat; and the limiting device and the safety switch are respectively mounted on the supporting seat or a guiding piece. The safe braking device clamped on the traction sheave of the traction machine has the advantages that damages to a steel wire rope or the outer surface of the traction sheave are avoided; the effective area of braking is large, the braking effect is good and the operation is safe; and the safe braking device clamped on the traction sheave of the traction machine has the advantages of simple structure, small volume, low manufacturing cost, high safety performance and wide application range.

Description

Safety catch on a kind of traction sheave that is clamped in towing machine

Technical field

The utility model belongs to the elevator car safety technical field, is specifically related to the safety catch that is used for the car up-running over-speed protection on a kind of traction sheave that is clamped in towing machine

Background technology

" elevator manufacturing and installation safety standard " is defined in when arranging elevator must install the car protection device for over-speed ascending; This device be used in case of emergency rapidly stop traction sheave or steel rope or to pouring weight with the stop elevator car, perhaps direct stop car.Elevator cab protection device for over-speed ascending in the market has the wire holder of clamped wire rope and the safety tongs of clamping guide rail.The complex structure of wire holder, heaviness are damaged steel rope easily, and are needed certain installing space in the stop process.Safety tongs then is installed in lift car or on the pouring weight, when elevator is in error state, when the speed of car reaches the kinematic velocity that velocity limiter sets; Trigger the velocity limiter action immediately, this moment, the safety tongs action grasped guide rail; Make the car stop motion; This mode is because elevator operation inertia is big, and car stop time expand exists unsafe hidden danger.

for example; China utility model patent Granted publication CN200985260Y; A kind of " acting on the safety tongs on the traction sheave " disclosed; Having on its pedestal longitudinally rolls cooperates or is slidingly fitted in the dragging plate on the pedestal, has on the dragging plate through bearing pin pivotally attached brake block assembly, and an end of dragging plate is connected with a end of drag-line on being installed in pedestal one end through pull bar; The other end of drag-line is connected with the up velocity limiter of towing machine; Between dragging plate and said base one end at least one retracing spring is arranged, the moving shoe plate assembly of limited customization is around the inhibiting device of bearing pin hunting range on the dragging plate, and it also comprises and can clamp the limit switch and the pressing plate that can make it conducting of actuating signal by output safety.The advantage that this structure has is: the safety tongs on the traction sheave had both kept prior art to act on the advantage of the drg on the traction sheave, and volume is little, simple in structure again, noiselessness and working stability are reliable when not working.But also there is following shortcoming in actual use in said structure: at first, the brake shoe sheet of this device is that braking is on the outside face of traction sheave; Because the traction sheave outside face has grooving, the payload space of braking seldom, through after the braking repeatedly; The outside face of traction sheave is worn easily; External diameter reduces, and braking effect is variation gradually, even can't brake; Secondly, when this device is installed, need the mount pad of frame and so on to come to link, need certain installing space with locating plate, and this complex structure, the Installation and Debugging difficulty, the processing and manufacturing difficulty is big, causes cost than higher.

again for example, the Granted publication that the applicant unit proposes number be CN201567126U, is called the utility model patent of " safety catch on a kind of traction sheave that acts on towing machine "; Friction lining on its brake scotch is fitted on the cylindrical annulated column inside face of traction sheave; From the inside stop traction sheave of traction sheave, when the width of traction sheave hour, the friction lining width on the brake scotch also can reduce; Brake area reduces; Even increased the length of friction lining, the intensity of brake scotch and friction lining thereof reduces so, has potential safety hazard; So this safety catch can only be installed on the big towing machine of traction sheave width, Applicable scope is narrower.

For this reason, the applicant has carried out actively and the actv. trial, and the technical scheme that will introduce below produces under this background

Summary of the invention

The task of the utility model is the safety catch that will provide on a kind of traction sheave that is clamped in towing machine; It can be when lift car exceeds the speed limit the traction sheave of effective stop towing machine; And compact conformation, volume are little; Direct mount is easy to arrange, installs and debugging on towing machine; Simultaneously applied widely.

The task of the utility model is to accomplish like this; Safety catch on a kind of traction sheave that is clamped in towing machine; It is worked under the control of velocity limiter; Described towing machine comprises traction sheave, is characterized in: described safety catch comprises the connection seat assembly, supports seat, first caliper, second caliper, limiting device, extension spring, safety switch and first return spring and second return spring that described connection seat assembly is fixedly installed on the towing machine; Described support seat is П shape, this supports seat place slidingly on the coupling assembly and at the left and right sides of supporting seat pass through first return spring, second return spring is spacing; Described first caliper comprises brake scotch assembly and elastic parts; Described brake scotch assembly is installed in the inboard of supporting seat length direction one end slidingly; This brake scotch assembly comprises brake scotch and is located at first friction lining on the brake scotch one side side; One end of described elastic parts is fixed on and supports that seat is gone up, the other end of elastic parts and the opposite side flanked of brake scotch are touched, and described first friction lining is used for corresponding with a side side of said traction sheave Width and both are set in parallel; Described second caliper comprises slide block assembly and guide; Described slide block assembly comprises slide block and is located at second friction lining on the slide block one side side; This slide block assembly is plugged on the guide through described slide block; Described guide is installed in the inboard of supporting the seat length direction other end, and described second friction lining is used for corresponding with the opposite side side of said traction sheave Width and both are set in parallel; One end of described extension spring is connected with slide block, and the other end of extension spring is connected with supporting seat; Described limiting device is installed on supports on seat or the guide that this limiting device is realized being electrically connected through lead and velocity limiter, is used to limit described second friction lining and does not contact with described traction sheave; Described safety switch is installed on to be supported to be used to transmit the signal that slide block assembly has moved on seat or the guide.

are in one of the utility model concrete embodiment; Described connection seat assembly comprises connection seat, arm-tie, and described connection seat offers first slideway on last plane, and the middle part of connection seat length direction offers first breach that the traction sheave that is used to supply towing machine inserts; Described arm-tie is fixed on the vertical of connection seat; On the top inner wall of arm-tie short transverse, offer second slideway, second slideway and first slideway are set in parallel, and described support seat is plugged between first slideway, second slideway; And support the lower surface of seat to cooperate, support the upper surface of seat to cooperate with second slideway with first slideway.

are in another concrete embodiment of the utility model; Described elastic parts comprises dish spring, dish spring pin and locking plate; One end of described dish spring pin is fixed on and supports that seat is gone up, the dish spring is installed on the other end of dish spring pin; The opposite side flanked of described dish spring and brake scotch is touched, and described locking plate is set in an end end of dish spring pin and is positioned at the outside of supporting seat.

In another concrete embodiment of the utility model, described slide block assembly is plugged on the guide versatilely , and planing surface between the two is a bevelled with respect to the lateral surface of traction sheave Width.

are in another concrete embodiment of the utility model; Described guide comprises voussoir, pressing plate and roller row; Described voussoir is installed in the inboard of supporting the seat length direction other end, the rectangular echelon form of this voussoir, and wherein: first dip plane of right-angled trapezium is provided with towards the traction sheave direction; The two sides, front and back of right-angled trapezium is vertical with first dip plane; On this two sides, front and back, be separately installed with a pressing plate, each pressing plate is formed with second dip plane that parallels with described first dip plane in the side towards traction sheave, is formed with a space between described second dip plane and described first dip plane; The slide block of said slide block assembly is installed in this space; The same at right angles echelon form of described slide block, the 3rd dip plane on it is provided with towards described first dip plane and parallels with first dip plane, and described roller row is placed between first dip plane of the 3rd dip plane and voussoir of slide block.

also have among the concrete embodiment the utility model; Described limiting device comprises a limiting stopper; This limiting stopper is connected with velocity limiter through steel rope; Constitute a hook in the end of limiting stopper, offer one on the described slide block and be used to supply the groove of described hook insertion.

the utility model so that concrete embodiment in; Described safety switch is installed on the pressing plate of guide; On safety switch, be provided with one and touch sheet, be formed with a lug on the described slide block, this lug is used to touch described shake-up sheet.

are at more and among concrete embodiment of the utility model; The described seat of supporting is respectively equipped with top board, base plate at the upper and lower of short transverse, respectively be formed with at the middle part of top board and base plate one be used to supply the traction sheave insertion of towing machine second breach, the 3rd breach.

are at again and then among concrete embodiment of the utility model; Described connection seat assembly also includes a pair of baffle plate; A pair of baffle plate is fixed on the left and right sides of connection seat, and described first return spring, second return spring place the left and right sides of support seat length direction and contact with a pair of baffle plate.

at more and then among concrete embodiment of the utility model, and described first return spring, second return spring are a kind of in compression spring, extension spring or the torsion spring.

the utility model is because after adopting said structure; One of advantage that has, this safety catch are at glancing impact; First, second friction lining firmly grasps traction sheave from the both sides of traction sheave Width, thereby has avoided the damage to steel rope or traction sheave outside face that causes at the traction sheave outside face owing to braking in the prior art; Advantage two, because first, second friction lining is fitted on the side, both sides of traction sheave Width fully, the payload space of braking is increased, thereby can improve braking effect, guarantee the safety that moves; Advantage three, simple in structure, volume is little, low cost of manufacture, this device can be used as the part of towing machine and is directly installed on the towing machine, so need not take exterior installing space; Advantage four, no matter first, second friction lining be clamped on which direction of side, both sides of traction sheave Width, the traction sheave that this safety catch can both effectively urgent stop towing machine, so safety performance is high, and applied widely.

Description of drawings

Fig. 1 is the perspective view of an embodiment of the utility model.

Fig. 2 is the perspective view of the opposite side of Fig. 1 embodiment.

Fig. 3 is the planar structure scheme drawing of the utility model when release position.

Fig. 4 is the right elevation of Fig. 3.

There is not traction sheave in Fig. 5 and does not receive the structural representation under the spacing situation of limiting device in hypothesis for the utility model.

Fig. 6 is the planar structure scheme drawing of the utility model under braking mode.

Among figure: 1. connection seat assembly, 11. connection seats, 111. first slideways, 112. first breach, 12. baffle plates, 13. arm-ties, 131. second slideways; 2. support seat, 21. base plates, 211. the 3rd breach, 22. top boards, 221. second breach; 3. first caliper, 31. brake scotch assemblies, 311. brake scotch, 312. first friction linings, 32. elastic partss, 321. dish springs, 322. dish spring pins, 323. locking plates; 4. second caliper, 41. slide block assemblies, 411. slide blocks, 4111. grooves, 4112. lugs, 4113. the 3rd dip plane, 412. second friction linings, 42. guides, 421. voussoirs, 4211. first dip plane, 422. pressing plates, 4221. second dip plane, 423. rollers are arranged; 5. limiting device, 51, limiting stopper, 511. hooks; 6. extension spring; 7. safety switch, 71. touches sheet; 8. first return spring; 9. second return spring; 10. traction sheave.

The specific embodiment

can be expressly understood the technical spirit and the beneficial effect of the utility model more for the inspector that the makes Patent Office especially public; The applicant general combines accompanying drawing to elaborate with the mode of embodiment below; But the description to embodiment all is not the restriction to the utility model scheme, any according to the utility model design done only for pro forma but not substantial equivalent transformation all should be regarded as the technical scheme category of the utility model.

see also Fig. 1 and combine Fig. 2, Fig. 3, Fig. 4; Safety catch on a kind of traction sheave that is clamped in towing machine; It is worked under the control of velocity limiter; Described towing machine comprises traction sheave 10, and described safety catch comprises connection seat assembly 1, support seat 2, first caliper 3, second caliper 4, limiting device 5, extension spring 6, safety switch 7 and first return spring 8 and second return spring 9.

described connection seat assembly 1 is fixedly installed on the support of towing machine; Connection seat assembly 1 comprises connection seat 11, arm-tie 13 and a pair of baffle plate 12; Described connection seat 11 offers first slideway 111 on last plane, connection seat 11 offers first breach 112 that the traction sheave 10 that is used to supply towing machine inserts at the middle part of length direction.Described baffle plate 12 has a pair of, and a pair of baffle plate 12 is installed in the left and right sides of connection seat 11 through bolt.Described arm-tie 13 is fixed on the vertical of connection seat 11, on the top inner wall of arm-tie 13 short transverses, offers second slideway 131, and described second slideway 131 is set in parallel with described first slideway 111.

described support seat 2 is П shape; This support seat 2 places slidingly on the connection seat assembly 1 and is spacing through first return spring 8, second return spring 9 at left and right side; Specifically: support seat 2 to be plugged between second slideway 131 of first slideway 111 and arm-tie 13 of connection seat 11; And support the upper surface and second slideway, 131 bearing fits of seat 2; Support lower surface and first slideway, 111 bearing fits of seat 2, support a left and right side of 2 to be connected with a pair of baffle plate 12 of connection seat 11 left and right sides respectively through first return spring 8, second return spring 9.The support seat 2 of П shape is respectively equipped with top board 22, base plate 21 at the upper and lower of short transverse; Respectively be formed with one at the middle part of top board 22 and base plate 21 and be used to supply the traction sheave 10 of towing machine inserts second breach 221, the 3rd breach 211; And the size of described second breach 221 is greater than the size of described the 3rd breach 211, also offers respectively on the inwall of described top board 22 and base plate 21 on the left sides one side to be used to the slideway (meaning not shown in the figures) that supplies brake scotch assembly 31 to horizontally slip within it.

described first caliper 3 comprises brake scotch assembly 31 and elastic parts 32; Described brake scotch assembly 31 comprises brake scotch 311 and is located at first friction lining 312 on the brake scotch 311 1 side sides; Brake scotch assembly 31 is installed in to be supported the inboard of seat 2 length direction left ends and can horizontally slip, specifically: the upper and lower side of brake scotch 311 respectively with the inwall that is located at top board 22 and base plate 21 left sides one side on cooperating of slideway and realize sliding block joint; Described elastic parts 32 comprises dish spring 321, dish spring pin 322 and locking plate 323; One end of described dish spring pin 322 is fixed on to be supported on the seat 2, dish spring 321 is installed on the other end of dish spring pin 322; Described dish spring 321 touches with the opposite side flanked of brake scotch 311; Described locking plate 323 is set in an end end of dish spring pin 322 and is positioned at the outside of supporting seat 2, and described first friction lining 312 is used for corresponding with a side side of said traction sheave 10 Widths and both are set in parallel.

described second caliper 4 comprises slide block assembly 41 and guide 42, and slide assemblies 41 is plugged on the guide 42 versatilely, and planing surface between the two is bevelleds with respect to the lateral surface of traction sheave 10 Widths.Described slide block assembly 41 comprises slide block 411 and is located at second friction lining 412 on the slide block 411 1 side sides that described second friction lining 412 is used for corresponding with the opposite side side of said traction sheave 10 Widths and both are set in parallel.Described guide 42 comprises voussoir 421, pressing plate 422, roller row 423; Described voussoir 421 is installed in the inboard of supporting seat 2 length direction right-hand members; And the right-angled trapezium shape that is short, the following length of side in top; First dip plane 4211 of right-angled trapezium is the left side among Fig. 1 towards traction sheave 10 1 side settings; The two sides, front and back of right-angled trapezium is vertical with first dip plane 421; On this two sides, front and back, be separately installed with a pressing plate 422, each pressing plate 422 is formed with second dip plane 4221 that parallels with described first dip plane 4211 in the side towards traction sheave 10, is formed with a space between described second dip plane 4221 and described first dip plane 4211; The slide block 411 of said slide block assembly 41 is installed in this space; Described slide block 411 same at right angles echelon forms, the 3rd dip plane 4113 on it is provided with and parallels with first dip plane 4211 towards described first dip plane 4211, and described roller row 423 is placed between first dip plane 4211 of the 3rd dip plane 4113 and voussoir 421 of slide block 411.Roller row 423 is because the effect of two pressing plates 422 and can not coming off, and makes slide block 411 can be neatly move along the inclined-plane of voussoir 421 through roller row 423 simultaneously.

One end of described extension spring 6 is connected with slide block 411, and the other end of extension spring 6 is connected with supporting seat 2.Described limiting device 5 is installed on supports on seat 2 or the guide 42 that this limiting device 5 is realized being electrically connected through lead and velocity limiter, is used to limit described second friction lining 412 and does not contact with described traction sheave 10.In the present embodiment; Preferential selection is that limiting device 5 is installed on the support seat 2; This limiting device 5 comprises a limiting stopper 51, constitutes a hook 511 in the end of described limiting stopper 51, offers a groove 4111 on the described slide block 411; Hook 511 inserts in the grooves 4111, makes slide block 411 overcome the pulling force of self gravitation and extension spring 6 and is in top and the not landing of pressing plate 422.

described safety switch 7 is installed on to be supported on seat 2 or the guide 42; In the present embodiment; Preferential selection is mounted on the pressing plate 422 of guide 42; On safety switch 7, be provided with one and touch sheet 71, be formed with a lug 4112 on the described slide block 411, this lug 4112 is used to touch described shake-up sheet 71.

<b > see also Fig. 3, Fig. 5; The width of supposing traction sheave 10 is L, by the requirement of Fig. 3, when the slide block 411 of safety catch is in the upper position of pressing plate 422; The distance of regulating between first friction lining 312, second friction lining 412 is L1, and makes L1>L.By the requirement of Fig. 5, under the non-existent situation of traction sheave, when the slide block 411 of safety catch slided into the bottom position of pressing plate 422, the distance of regulating between first friction lining 312, second friction lining 412 was L2, and made L2< L.</b>

please continue to consult Fig. 3, Fig. 4, Fig. 5, Fig. 6 and combine Fig. 1 and Fig. 2; The principle of work of concrete narration the utility model: when safety catch is in initial condition and is release position (as shown in Figure 3); The hook 511 of limiting stopper 51 inserts in the groove 4111 of slide blocks 411 and withstands slide block 411; Thereby prevent that it from gliding along guide 42, first friction lining 312 on the brake scotch 311 and the distance between second friction lining 412 on the slide block 411 are L1, and L1>L is not so can produce braking to traction sheave 10.Lug 4111 on the slide block 411 is in safety switch 7 treats mode of operation.When elevator moves generation out of control hypervelocity, when speed reaches the mechanical action of up velocity limiter (not shown), up velocity limiter output mechanical action signal; The steel rope that tension links to each other with limiting stopper 51; Steel rope pulling limiting stopper 51, the hook 511 of limiting stopper 51 is drawn out from the groove 4111 of slide block 411, so slide block 411 glides along roller row 423 under the tension of self gravitation and extension spring 6; In the moment that slide block 411 glides; The lug 4112 of slide block 411 is depressed the shake-up sheet 71 on the safety switch 7, gives the towing machine control system by the affirmation signal that safety switch 7 output slide blocks 411 have moved, is convenient in time cut off the power supply of towing machine.At this moment, traction sheave 10 is because inertia is rotated further, and slide block 411 also continues along roller row 423 to the lower left landing; And more and more near the right flank of traction sheave 10 Widths; When second friction lining 412 on the slide block 411 contacted with the right flank of traction sheave 10 Widths, slide block 411 did not slide into the bottom of guide 42, so the rotatory inertia of traction sheave 10 continues to drag slide block 411 to the lower left landing; But because the existence of traction sheave 10 makes slide block 411 receive traction sheave resistance to the right; Force slide block 411 to move right, drive guide 42 simultaneously, support parts such as seat 2, brake scotch assembly 31, elastic parts 32 to move right, make first friction lining 312 on the brake scotch 311 more and more near the left surface of traction sheave 10 Widths along first slideway 111, second slideway 131; When the contacted moment of left surface of first friction lining 312 and traction sheave 10; Dish spring 321 is not compressed, and the distance between first friction lining 312 and second friction lining 412 is L, this shows; Slide block 411 does not also slide into the bottom of guide 42; Move right so also can drive parts such as guide 42, support seat 2 in the process of these rear slider 411 continuation landings, but because the existence of traction sheave 10, first friction lining 312 can't move right; The left surface compact disc spring 321 of the support seat 2 that makes brake scotch assembly 31 and continue to move right; Until because the pressure of dish spring 321 makes second friction lining 412 on first friction lining 312 and the slide block 411 on the brake scotch 311 grasp traction sheave 10 firmly from the two sides of traction sheave 10 Widths, make the lift car stop motion, thereby guaranteed people or the safety of article in the lift car.Remove the back when emergency situation and adopt hand reset, as long as slide block 411 is pulled in preset position and the groove 4111 with the hook 511 insertion slide blocks 411 of resetting block 51, safety catch promptly returns back to initial condition when resetting

Claims

1. the safety catch on a kind of traction sheave that is clamped in towing machine; It is worked under the control of velocity limiter; Described towing machine comprises traction sheave (10); It is characterized in that: described safety catch comprises connection seat assembly (1), supports seat (2), first caliper (3), second caliper (4), limiting device (5), extension spring (6), safety switch (7) and first return spring (8) and second return spring (9) that described connection seat assembly (1) is fixedly installed on the towing machine; Described support seat (2) is П shape, this supports seat (2) place coupling assembly (1) to go up slidingly and pass through first return spring (8) at the left and right sides of supporting seat (2), second return spring (9) is spacing; Described first caliper (3) comprises brake scotch assembly (31) and elastic parts (32); Described brake scotch assembly (31) is installed in the inboard of supporting seat (2) length direction one end slidingly; This brake scotch assembly (31) comprises brake scotch (311) and is located at first friction lining (312) on brake scotch (311) the one side sides; One end of described elastic parts (32) is fixed on and supports that seat (2) is gone up, the other end of elastic parts (32) and the opposite side flanked of brake scotch (311) are touched, and described first friction lining (312) is used for corresponding with a side side of said traction sheave (10) Width and both are set in parallel; Described second caliper (4) comprises slide block assembly (41) and guide (42); Described slide block assembly (41) comprises slide block (411) and is located at second friction lining (412) on slide block (411) the one side sides; This slide block assembly (41) is plugged on the guide (42) through described slide block (411); Described guide (42) is installed in the inboard of supporting seat (2) length direction other end, and described second friction lining (412) is used for corresponding with the opposite side side of said traction sheave (10) Width and both are set in parallel; One end of described extension spring (6) is connected with slide block (411), and the other end of extension spring (6) is connected with supporting seat (2); Described limiting device (5) is installed on supports on seat (2) or the guide (42) that this limiting device (5) is realized being electrically connected through lead and velocity limiter, is used to limit described second friction lining (412) and does not contact with described traction sheave (10); Described safety switch (7) is installed on to be supported to be used to transmit the signal that slide block assembly (41) has moved on seat (2) or the guide (42).

2. the safety catch on a kind of traction sheave that is clamped in towing machine according to claim 1; It is characterized in that described connection seat assembly (1) comprises connection seat (11), arm-tie (13); Described connection seat (11) offers first slideway (111) on last plane; The middle part of connection seat (11) length direction offers first breach (112) of traction sheave (10) insertion that is used to supply towing machine; Described arm-tie (13) is fixed on the vertical of connection seat (11); On the top inner wall of arm-tie (13) short transverse, offer second slideway (131), second slideway (131) is set in parallel with first slideway (111), and described support seat (2) is plugged between first slideway (111), second slideway (131); And support the lower surface of seat (2) to cooperate, support the upper surface of seat (2) to cooperate with second slideway (131) with first slideway (111).

3. the safety catch on a kind of traction sheave that is clamped in towing machine according to claim 1; It is characterized in that described elastic parts (32) comprises dish spring (321), dish spring pin (322) and locking plate (323); One end of described dish spring pin (322) is fixed on and supports that seat (2) is gone up, dish spring (321) is installed on the other end of dish spring pin (322); Described dish spring (321) touches with the opposite side flanked of brake scotch (311), and described locking plate (323) is set in an end end of dish spring pin (322) and is positioned at the outside of supporting seat (2).

4. the safety catch on a kind of traction sheave that is clamped in towing machine according to claim 1; It is characterized in that described slide block assembly (41) is plugged on the guide (42) versatilely, planing surface between the two is a bevelled with respect to the lateral surface of traction sheave (10) Width.

5. the safety catch on a kind of traction sheave that is clamped in towing machine according to claim 1; It is characterized in that described guide (42) comprises voussoir (421), pressing plate (422) and roller row (423); Described voussoir (421) is installed in the inboard of supporting seat (2) length direction other end; This voussoir (421) is echelon form at right angles; Wherein: first dip plane (4211) of right-angled trapezium is towards traction sheave (10) direction setting; The two sides, front and back of right-angled trapezium is vertical with first dip plane (421); On this two sides, front and back, be separately installed with a pressing plate (422), each pressing plate (422) is formed with second dip plane (4221) that parallels with described first dip plane (4211) in the side towards traction sheave (10), is formed with a space between described second dip plane (4221) and described first dip plane (4211); The slide block (411) of said slide block assembly (41) is installed in this space; The same at right angles echelon form of described slide block (411), the 3rd dip plane (4113) on it is provided with towards described first dip plane (4211) and parallels with first dip plane (4211), and described roller row (423) is placed between first dip plane (4211) of the 3rd dip plane (4113) and voussoir (421) of slide block (411).

6. the safety catch on a kind of traction sheave that is clamped in towing machine according to claim 1; It is characterized in that described limiting device (5) comprises a limiting stopper (51); This limiting stopper (51) is connected with velocity limiter through steel rope; Constitute a hook (511) in the end of limiting stopper (51), offer one on the described slide block (411) and be used to supply the groove (4111) of described hook (511) insertion.

7. the safety catch on a kind of traction sheave that is clamped in towing machine according to claim 1; It is characterized in that described safety switch (7) is installed on the pressing plate (422) of guide (42); On safety switch (7), be provided with one and touch sheet (71); Be formed with a lug (4112) on the described slide block (411), this lug (4112) is used to touch described shake-up sheet (71).

8. the safety catch on a kind of traction sheave that is clamped in towing machine according to claim 1; It is characterized in that described support seat 2 upper and lowers in short transverse are respectively equipped with top board (22), base plate (21), respectively are formed with one and are used to supply second breach (221), the 3rd breach (211) of traction sheave (10) insertion of towing machine at the middle part of top board (22) and base plate (21).

9. the safety catch on a kind of traction sheave that is clamped in towing machine according to claim 1; It is characterized in that described connection seat assembly (1) also includes a pair of baffle plate (12); A pair of baffle plate (12) is fixed on the left and right sides of connection seat (11), and described first return spring (8), second return spring (9) place the left and right sides of support seat (2) length direction and contact with a pair of baffle plate (12).

10. Safety catch on a kind of traction sheave that is clamped in towing machine according to claim 1 is characterized in that a kind of in compression spring, extension spring or the torsion spring of described first return spring (8), second return spring (9)