Fire safety escape module

Abstract

The utility model discloses a fire safety escape module, and relates to the technical field of fire safety equipment. The device comprises a shell, a lower cavity and an upper cavity are formed in the lower portion and the upper portion of the interior of the shell respectively, fixing assemblies are arranged on the two sides of the shell, and an auxiliary assembly is further arranged in the upper cavity; the fixing assembly comprises fixing boxes rotationally connected to the outer walls of the two sides of the shell, first moving plates are movably connected into the fixing boxes, electric push rods are fixedly connected to the front end faces of the fixing boxes, and output shafts of the electric push rods are fixedly connected to the front end faces of the first moving plates. The first moving plate and the electric push rod drive the drill rod to be inserted into a wall or a windowsill, the module is fixed, the problem that an existing module is not convenient to fix quickly is solved, meanwhile, the second moving plate and the threaded rod drive the mounting plate and the convex thorns to move, door breaking or window breaking is achieved through movement of the convex thorns, and the module is convenient to use. The problem of poor functionality in the prior art is solved.

Description

Technical Field

[0001] This utility model belongs to the field of fire safety equipment technology, and in particular relates to a fire safety escape module. Background Technology

[0002] Firefighting equipment, also known as fire-fighting gear, refers to equipment used for fire prevention, fire control, and fire accidents. Common firefighting equipment includes fire extinguishers, fire blankets, smoke masks, escape ropes, and descent devices. Among them, descent devices, also known as safety escape modules, are mainly used to help people descend from heights during a fire.

[0003] A document with publication number CN219149061U discloses a household fire safety high-altitude escape device, including a device box, a descent device main unit, a rope reel, and a safety belt. A stop block is welded to the bottom end of the lead screw, and steel buckles are symmetrically fixed on both sides of the bottom surface of the adjusting block.

[0004] However, it still has the following drawbacks in practical use:

[0005] The aforementioned fire safety high-altitude escape device has a descent unit and a rope reel installed on both sides of the inner wall of its housing. Steel cables are threaded through the inner walls of the descent unit and rope reel, with safety belts hinged to both ends of the cables. The descent unit and rope reel drive the steel cables and safety belts to rise and fall, thus achieving a slow descent of personnel. However, during use, it is inconvenient to quickly secure the housing, resulting in the housing being movable during the descent, leading to poor safety performance. Furthermore, this fire safety high-altitude escape device only allows for the slow descent of personnel, lacking functionality and not facilitating escape. Therefore, we provide a fire safety escape module to solve the aforementioned problems. Utility Model Content

[0006] The purpose of this utility model is to provide a fire safety escape module. The module is fixed by inserting a drill rod into the wall or windowsill through a first movable plate and an electric push rod, which solves the problem of the inconvenience of quick fixation in existing modules. At the same time, the second movable plate and a threaded rod drive the mounting plate and the protrusions to move, and the movement of the protrusions can break the door or window, which solves the problem of poor functionality in existing modules.

[0007] To solve the above-mentioned technical problems, this utility model is achieved through the following technical solution:

[0008] This utility model is a fire safety escape module, including an outer shell, with a lower chamber and an upper chamber respectively arranged at the bottom and top of the inner side of the outer shell, fixing components arranged on both sides of the outer shell, and auxiliary components arranged inside the upper chamber;

[0009] The fixing assembly includes a fixing box rotatably connected to the outer walls of both sides of the housing, a first movable plate movably connected inside the fixing box, an electric push rod fixedly connected to the front face of the fixing box, the output shaft of the electric push rod fixedly connected to the front face of the first movable plate, and sleeves penetrating all four sides of the rear face of the fixing box, with a drill rod sleeved inside the sleeve, and the front end of the drill rod fixedly connected to all four sides of the rear face of the first movable plate.

[0010] The auxiliary component includes a second movable plate movably connected to the interior of the upper chamber. A fixing rod is welded to the upper surface of the second movable plate, and a mounting plate is welded to the top of the fixing rod. Multiple protrusions are welded at equal intervals to the upper surface of the mounting plate. Threaded rods are rotatably connected to the front and rear ends of the interior of the upper chamber. A slider is threaded onto the threaded rod, and one end of the slider is welded to the front and rear end faces of the first movable plate, respectively.

[0011] A further feature of this invention is that an installation rod is welded to the outer wall of the fixed box on the side closest to the outer shell, and the end of the installation rod away from the fixed box rotates through the outer wall of the outer shell and is threaded with a clamping plate, which is located inside the lower chamber.

[0012] A further feature of this invention is that: circular grooves are provided on the lower sides of both outer walls of the outer shell, and multiple connecting rods are movably connected at equal intervals along the circumference inside the circular grooves. The end of the connecting rod located outside the circular groove is welded to the outer wall of the fixed box on the side near the outer shell.

[0013] A further feature of this invention is that: a cover plate is rotatably connected to one side of the top of the outer shell, and a fixing plate is fixedly connected to the other side of the top of the outer shell. A first sliding rod is movably passed through the front and rear ends of the outer wall of the fixing plate. A limiting nut is threaded onto one end of the first sliding rod, and a connecting block is fixedly connected to the other end of the first sliding rod. The same U-shaped frame is welded between the connecting blocks. A return spring is sleeved on the outer side of the first sliding rod. The two ends of the return spring are fixedly connected to the opposing surfaces of the fixing plate and the connecting block, respectively. The free end of the cover plate is engaged inside the U-shaped frame.

[0014] A further feature of this invention is that a slow-descent assembly is provided inside the lower chamber, a portion of which extends to the lower part of the outer shell. The slow-descent assembly includes a take-up roller rotatably connected to the center of the lower chamber. Slow-descent rollers are rotatably connected to both sides and the top of the take-up roller. Guide rollers are rotatably connected to both sides below the take-up roller. A steel wire rope is wound on the take-up roller. The end of the steel wire rope away from the take-up roller passes through the slow-descent roller and the guide roller in sequence and is fixedly connected to a mounting frame. Guide wheels are rotatably connected to both sides of the bottom of the mounting frame. A safety belt is fitted on the guide wheels. Both ends of the safety belt are fixedly connected to collars. An elastic band is fixedly connected to the bottom of the collars. A first buckle and a second buckle are fixedly connected to both ends of the elastic band, respectively.

[0015] A further feature of this invention is that: a second sliding rod is fixedly connected longitudinally to all four sides of the interior of the fixed box; the second sliding rods movably pass through the four sides of the end face of the first moving plate; a compression spring is sleeved on the outer side of the second sliding rod; and the two ends of the compression spring are fixedly connected to the inner front end of the fixed box and the front end face of the first moving plate, respectively.

[0016] A further feature of this invention is that a third slide rod is fixedly connected vertically to both sides of the interior of the upper chamber, and the third slide rods respectively movably pass through both sides of the surface of the second movable plate.

[0017] A further feature of this invention is that the bottom end of the threaded rod rotates through the bottom of the upper chamber and is fitted with a first synchronous pulley. The first synchronous pulley is located inside the lower chamber. A drive motor is fixedly connected to the top of the inner side of the lower chamber via a motor frame. A second synchronous pulley is fitted on the output shaft of the drive motor. The first and second synchronous pulleys are connected by a synchronous belt drive.

[0018] This utility model has the following beneficial effects:

[0019] 1. This utility model, by setting a fixing component, activates an electric push rod. After the electric push rod is activated, its output shaft drives the first moving plate to move inside the fixing box. With the help of the compression spring, the first moving plate drives the tip of the drill rod to move outward of the sleeve, thereby allowing the drill rod to be inserted into the wall or windowsill. This achieves quick fixing of the outer shell to the wall or windowsill, facilitating the rapid fixing of the module and preventing the module from shifting during the slow descent process, thus enhancing safety and practicality.

[0020] 2. This utility model, by setting up auxiliary components, starts the drive motor. The output shaft of the drive motor drives the first synchronous wheel and the threaded rod to rotate synchronously through the second synchronous wheel and the synchronous belt. Under the action of the threaded connection between the threaded rod and the slider, the slider drives the second moving plate to move. The second moving plate drives the protrusion to move through the mounting plate. Thus, the movement of the protrusion enables the breaking of doors or windows, which facilitates the assistance of personnel in breaking doors or windows, facilitates the escape of personnel, and enhances functionality.

[0021] Of course, any product implementing this utility model does not necessarily need to achieve all of the advantages described above at the same time. Attached Figure Description

[0022] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0023] Figure 1 This is a schematic diagram of the overall structure of a fire safety escape module.

[0024] Figure 2 This is a front sectional view of the present invention.

[0025] Figure 3 This is a schematic diagram of the structure of the outer shell of this utility model.

[0026] Figure 4 This is a schematic diagram of the U-shaped frame of this utility model.

[0027] Figure 5 This is a schematic diagram of the structure of the slow-descent component of this utility model.

[0028] Figure 6 This is a side sectional view of the fixing component of this utility model.

[0029] Figure 7 This is a structural schematic diagram of the fixing box of this utility model.

[0030] Figure 8 This is a schematic diagram of the structure of the first movable plate of this utility model.

[0031] Figure 9 This is a schematic diagram of the structure of the auxiliary component of this utility model.

[0032] Figure 10 This is a schematic diagram of the mounting plate of this utility model.

[0033] Figure 11This is a schematic diagram showing the installation between the threaded rod and the drive motor of this utility model.

[0034] The attached diagram lists the components represented by each number as follows:

[0035] 1-Outer shell, 101-Lower chamber, 102-Upper chamber, 103-Circular groove, 104-Cover plate, 105-U-shaped frame, 105a-Fixing plate, 105b-First slide rod, 105c-Limit nut, 105d-Connecting block, 105e-Reset spring, 2-Decelerating assembly, 201-Take-up roller, 202-Decelerating roller, 203-Guide roller, 204-Wire rope, 205-Mounting bracket, 206-Guide wheel, 207-Safety belt, 208-Loop, 208a-Elastic band, 208b-First buckle, 208c-Second buckle, 3-Fixing assembly, 301 - Fixed box, 301a- Mounting rod, 301b- Clamping plate, 301c- Connecting rod, 302- First moving plate, 302a- Second slide rod, 302b- Compression spring, 303- Electric push rod, 304- Sleeve, 305- Drill rod, 4- Auxiliary components, 401- Second moving plate, 401a- Third slide rod, 402- Mounting plate, 402a- Fixed rod, 403- Spike, 404- Threaded rod, 404a- Slider, 404b- First synchronous pulley, 405- Drive motor, 405a- Motor frame, 405b- Second synchronous pulley, 405c- Synchronous belt. Detailed Implementation

[0036] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0037] Example 1

[0038] Please see Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 and Figure 8As shown, this is the first embodiment of the present invention. This embodiment provides a fire safety escape module, including a shell 1. The shell 1 has a lower chamber 101 and an upper chamber 102 respectively located at the bottom and top of the shell. Fixing components 3 are provided on both sides of the shell 1. The fixing components 3 include a fixing box 301, a first moving plate 302, an electric push rod 303, a sleeve 304, and a drill rod 305. The drill rod 305 is moved by the first moving plate 302 and the electric push rod 303, so that the drill rod 305 can be inserted into the wall or windowsill, which solves the problem of the existing method of not being able to fix quickly.

[0039] Specifically, the fixed box 301 is rotatably connected to the outer walls of both sides of the outer casing 1. The first movable plate 302 is movably connected inside the fixed box 301. An electric push rod 303 is fixedly connected to the front end face of the fixed box 301. The output shaft of the electric push rod 303 is fixedly connected to the front end face of the first movable plate 302. Sleeves 304 are inserted around the rear end face of the fixed box 301. A drill rod 305 is fitted inside the sleeve 304. The front end of the drill rod 305 is fixedly connected around the rear end face of the first movable plate 302. The fixed box 301 is used to install the first movable plate 302 and other structures. The first movable plate 302 is used to drive the drill rod 305 to move. The electric push rod 303 is used to drive the first movable plate 302 to move. The sleeve 304 is used to connect the drill rod 305 and the fixed box 301. The drill rod 305 is used to fix the fixed box 301 to the wall or windowsill.

[0040] Furthermore, a mounting rod 301a is welded to the outer wall of the fixed box 301 near the outer shell 1. The end of the mounting rod 301a away from the fixed box 301 rotates through the outer wall of the outer shell 1 and is threaded with a clamping plate 301b. The clamping plate 301b is located inside the lower chamber 101.

[0041] Both sides of the outer wall of the outer shell 1 are provided with circular grooves 103. Multiple connecting rods 301c are movably connected at equal intervals along the circumference inside the circular grooves 103. One end of the connecting rod 301c located outside the circular groove 103 is welded to the outer wall of the fixed box 301 near the outer shell 1.

[0042] The lower chamber 101 is equipped with a slow-descent assembly 2. A portion of the slow-descent assembly 2 extends to the lower part of the outer shell 1. The slow-descent assembly 2 includes a take-up roller 201 rotatably connected to the center of the lower chamber 101. Slow-descent rollers 202 are rotatably connected to both sides and the top of the take-up roller 201. Guide rollers 203 are rotatably connected to both sides of the bottom of the take-up roller 201. A steel wire rope 204 is wound on the take-up roller 201. The end of the steel wire rope 204 away from the take-up roller 201 passes through the slow-descent roller 202 and the guide roller 203 in sequence and is fixedly connected to a mounting bracket 205. Guide wheels 206 are rotatably connected to both sides of the bottom of the mounting bracket 205. A safety belt 207 is fitted on the guide wheel 206. Both ends of the safety belt 207 are fixedly connected to collars 208. An elastic band 208a is fixedly connected to the bottom of the collars 208. A first buckle 208b and a second buckle 208c are fixedly connected to both ends of the elastic band 208a, respectively.

[0043] The operation process of this embodiment is as follows: First, place the outer casing 1 on a wall or windowsill and start the electric push rod 303. After the electric push rod 303 is started, its output shaft drives the first moving plate 302 to move inside the fixed box 301. With the setting of the compression spring 302b, the first moving plate 302 drives the tip of the drill rod 305 to move outward of the sleeve 304, so that the drill rod 305 is inserted into the wall or windowsill, realizing the quick fixation of the outer casing 1 to the wall or windowsill. Then, let the collar 208 be put on the user's arm, and connect the two elastic bands 208a to each other through the first buckle 208b and the second buckle 208c, realizing the wearing of the device on the user.

[0044] Example 2

[0045] Please see Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 9 , Figure 10 and Figure 11 As shown, this is the second embodiment of the present invention. This embodiment is based on the previous embodiment, but differs from the previous embodiment in that: an auxiliary component 4 is also provided inside the upper chamber 102. The auxiliary component 4 includes a second moving plate 401, a mounting plate 402, a protrusion 403, and a threaded rod 404. The threaded rod 404 drives the second moving plate 401 and the mounting plate 402 to move, and the movement of the mounting plate 402 and the protrusion 403 enables personnel to break doors or windows, thus solving the problem of poor functionality in the existing system.

[0046] Specifically, the second movable plate 401 is movably connected to the interior of the upper chamber 102. A fixing rod 402a is welded to the upper surface of the second movable plate 401, and an mounting plate 402 is welded to the top of the fixing rod 402a. Multiple protrusions 403 are welded at equal intervals to the upper surface of the mounting plate 402. Threaded rods 404 are rotatably connected to the front and rear ends of the interior of the upper chamber 102. A slider 404a is threaded onto the threaded rod 404. One end of the slider 404a is welded to the front and rear end faces of the first movable plate 302. The second movable plate 401 is used to drive the mounting plate 402 to move. The mounting plate 402 is used to install the protrusions 403 and drive the protrusions 403 to move. The fixing rod 402a is used to fix the mounting plate 402 onto the second movable plate 401. The protrusions 403 facilitate breaking doors or windows. The threaded rod 404 and the slider 404a are used to drive the second movable plate 401 to move.

[0047] Furthermore, a cover plate 104 is rotatably connected to one side of the top of the outer shell 1, and a fixing plate 105a is fixedly connected to the other side of the top of the outer shell 1. A first slide rod 105b is movably passed through the front and rear ends of the outer wall of the fixing plate 105a. A limiting nut 105c is threaded on one end of the first slide rod 105b, and a connecting block 105d is fixedly connected to the other end of the first slide rod 105b. The same U-shaped frame 105 is welded between the connecting blocks 105d. A return spring 105e is sleeved on the outside of the first slide rod 105b. The two ends of the return spring 105e are fixedly connected to the facing surfaces of the fixing plate 105a and the connecting block 105d, respectively. The free end of the cover plate 104 is snapped into the inside of the U-shaped frame 105.

[0048] The interior of the fixed box 301 is longitudinally fixedly connected with a second slide rod 302a. The second slide rod 302a movably passes through the end face of the first moving plate 302. A compression spring 302b is sleeved on the outside of the second slide rod 302a. The two ends of the compression spring 302b are fixedly connected to the inner front end of the fixed box 301 and the front end face of the first moving plate 302.

[0049] The upper chamber 102 has a third slide rod 401a fixedly connected vertically on both sides of the interior. The third slide rod 401a moves through both sides of the surface of the second movable plate 401 respectively.

[0050] The bottom end of the threaded rod 404 rotates through the bottom of the upper chamber 102 and is fitted with a first synchronous pulley 404b. The first synchronous pulley 404b is located inside the lower chamber 101. The inner top of the lower chamber 101 is fixedly connected to a drive motor 405 via a motor frame 405a. A second synchronous pulley 405b is fitted on the output shaft of the drive motor 405. The first synchronous pulley 404b and the second synchronous pulley 405b are connected by a synchronous belt 405c.

[0051] The rest of the structure is the same as in Example 1.

[0052] The operation process of this embodiment is as follows: First, an external force is applied to the U-shaped frame 105 to separate the U-shaped frame 105 from the cover plate 104, and the cover plate 104 is rotated so that the cover plate 104 leaves the opening at the top of the outer shell 1. Then, the top opening of the outer shell 1 is aligned with the door or window. Finally, the drive motor 405 is started. The output shaft of the drive motor 405 drives the first synchronous wheel 404b and the threaded rod 404 to rotate synchronously through the second synchronous wheel 405b and the synchronous belt 405c. Under the action of the threaded connection between the threaded rod 404 and the slider 404a, the slider 404a drives the second moving plate 401 to move. The second moving plate 401 drives the protrusion 403 to move through the mounting plate 402, thereby breaking the door or window through the movement of the protrusion 403.

[0053] In the description of this specification, references to terms such as "an embodiment," "example," "specific example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0054] The preferred embodiments of this utility model disclosed above are merely illustrative of the present utility model. These preferred embodiments do not exhaustively describe all details, nor do they limit the utility model to the specific implementations described. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of this utility model, thereby enabling those skilled in the art to better understand and utilize it.

Claims

1. A fire safety escape module, comprising a shell (1), a lower chamber (101) and an upper chamber (102) are arranged below and above the inside of the shell (1) respectively, characterized in that: Both sides of the shell (1) are provided with fixed components (3), and the inside of the upper chamber (102) is further provided with auxiliary components (4); The fixed component (3) comprises a fixed box (301) rotatably connected to the outer wall of both sides of the shell (1), and a first moving plate (302) movably connected inside the fixed box (301), a front end surface of the fixed box (301) is fixedly connected with an electric push rod (303), and an output shaft of the electric push rod (303) is fixedly connected to the front end surface of the first moving plate (302), a sleeve pipe (304) penetrates through the periphery of the rear end surface of the fixed box (301), and a drill rod (305) is sleeved inside the sleeve pipe (304), and the front end of the drill rod (305) is fixedly connected to the periphery of the rear end surface of the first moving plate (302); The auxiliary component (4) comprises a second moving plate (401) movably connected inside the upper chamber (102), and a fixed rod (402a) is welded to the upper surface of the second moving plate (401), a mounting plate (402) is welded to the top end of the fixed rod (402a), and a plurality of protrusions (403) are equidistantly welded to the upper surface of the mounting plate (402), threaded rods (404) are rotatably connected to the inside of the front and rear ends of the upper chamber (102), and a sliding block (404a) is threadedly sleeved on the threaded rod (404), and one end of the sliding block (404a) is welded to the front and rear end surfaces of the first moving plate (302), respectively.

2. A fire safety escape module according to claim 1, characterised in that, A mounting rod (301a) is welded to the side wall of the fixed box (301) close to the shell (1), one end of the mounting rod (301a) away from the fixed box (301) rotatably penetrates through the outer wall of the shell (1) and is threadedly sleeved with a clamping plate (301b), and the clamping plate (301b) is located inside the lower chamber (101).

3. A fire safety escape module according to claim 2, wherein, A circular groove (103) is formed in the lower part of the outer wall of both sides of the shell (1), and a plurality of connecting rods (301c) are movably connected to the inside of the circular groove (103) at equal intervals along the circumference, and one end of the connecting rod (301c) outside the circular groove (103) is welded to the side wall of the fixed box (301) close to the shell (1).

4. A fire safety escape module according to claim 2, wherein, A cover plate (104) is rotatably connected to one side of the top of the shell (1), and a fixed plate (105a) is fixedly connected to the other side of the top of the shell (1), first sliding rods (105b) movably penetrate through the outer wall of the fixed plate (105a) at the front and rear ends, and a limiting nut (105c) is threadedly sleeved on one end of the first sliding rod (105b), a connecting block (105d) is fixedly connected to the other end of the first sliding rod (105b), and a same U-shaped frame (105) is welded between the connecting blocks (105d), a reset spring (105e) is sleeved outside the first sliding rod (105b), and the two ends of the reset spring (105e) are fixedly connected to the opposite surfaces of the fixed plate (105a) and the connecting block (105d), respectively, and the free end of the cover plate (104) is clamped inside the U-shaped frame (105).

5. A fire safety escape module according to claim 2, wherein, The inside of the lower chamber (101) is provided with a slow descent assembly (2), and a part of the slow descent assembly (2) extends below the shell (1), the slow descent assembly (2) comprises a winding roller (201) rotationally connected at the central position inside the lower chamber (101), and slow descent rollers (202) are rotationally connected on both sides and above the winding roller (201), guide rollers (203) are rotationally connected on both sides below the winding roller (201), and a steel wire rope (204) is wound on the winding roller (201), one end of the steel wire rope (204) away from the winding roller (201) sequentially passes through the slow descent rollers (202) and the guide rollers (203) and is fixedly connected with a mounting frame (205), guide rollers (206) are rotationally connected on both sides of the bottom of the mounting frame (205), a safety belt (207) is sleeved on the guide rollers (206), and the both ends of the safety belt (207) are fixedly connected with eye splices (208), the eye splices (208) are fixedly connected with elastic bands (208a) below, and the both ends of the elastic bands (208a) are fixedly connected with first buckles (208b) and second buckles (208c) respectively.

6. A fire safety escape module according to claim 1, wherein, The second slide rods (302a) are fixedly connected on the inner side of the fixed box (301) around the periphery in the longitudinal direction, and the second slide rods (302a) respectively movably penetrate the end faces of the first moving plate (302) around the periphery.

7. A fire safety escape module according to claim 1, wherein, The third slide rods (401a) are fixedly connected on the inner side of the upper chamber (102) around the periphery in the vertical direction, and the third slide rods (401a) respectively movably penetrate the surfaces of the second moving plate (401) around the periphery.

8. A fire safety escape module according to claim 1, wherein, The bottom end of the threaded rod (404) rotationally penetrates the bottom of the upper chamber (102) and is sleeved with a first synchronous wheel (404b), and the first synchronous wheel (404b) is located inside the lower chamber (101), the inner side of the lower chamber (101) is fixedly connected with a driving motor (405) on the top through a motor bracket (405a), and the output shaft of the driving motor (405) is sleeved with a second synchronous wheel (405b), and the first synchronous wheel (404b) and the second synchronous wheel (405b) are drivingly connected through a synchronous belt (405c).

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