Pull arm welding tool of hook arm vehicle

Abstract

The invention relates to the technical field of draw arm welding tools, in particular to a draw arm welding tool of a hook arm truck, which comprises a tool seat, a limiting seat is fixedly mounted on the tool seat, limiting rods are rotatably connected to the inner walls of the two sides of the limiting seat, a push assisting rod is rotatably connected to the inner wall of one side of the limiting seat, and a guide frame is fixedly connected to the limiting seat. The treatment grinding disc is rotationally connected to the lower portion of the fixing base, the edge welding treatment mechanism is arranged below the treatment grinding disc in a sliding fit mode, and by arranging the treatment grinding disc and the edge welding treatment mechanism, the welding end can be pretreated before a hook is welded to the welding end of the pull arm, corrosion can be effectively removed, the welding quality can be improved, and defects can be reduced; in addition, the processing millstone and the welding edge processing mechanism can preheat the welding end of the draw arm through friction so as to reduce cracks caused by thermal stress in the welding process, and therefore the overall effect of the hook arm vehicle draw arm welding process is comprehensively improved.

Description

Technical Field

[0001] The invention relates to the technical field of pull arm welding tooling, in particular to a pull arm welding tooling for a hook arm vehicle. Background Art

[0002] The hook-arm truck's boom is a key component used for lifting, loading, and unloading cargo. It is primarily used to lift, transport, and unload various types of cargo containers, such as trash cans and containers, through the operation of the boom. Hook-arm trucks are widely used in waste collection, construction material transportation, and other industries requiring frequent loading and unloading. The hook-arm truck's boom welding fixture is a tool and equipment used to ensure the precise docking and welding of the boom components during the manufacturing process. By integrating intelligent welding equipment and leveraging modern advanced technologies (such as artificial intelligence, automation, robotics, the Internet of Things, and sensor technology), the hook-arm welding fixture improves the accuracy, efficiency, stability, and safety of the welding process. By integrating multiple intelligent functions, intelligent welding equipment can automatically adjust welding parameters, monitor the welding process in real time, optimize welding quality, and provide timely warnings when anomalies occur, reducing manual intervention and achieving more efficient and precise welding operations.

[0003] The document with prior art publication number CN208895463U provides a welding tool for the middle pulling arm of a hook arm car. By setting a left locating part, a middle locating part, and a right locating part, a left locating shaft, a middle locating shaft, and a right locating shaft are inserted into the locating parts, and a shaft sleeve is provided between the locating part and the locating shaft. When the middle pulling arm is placed on the upper end of the tooling body, the middle pulling arm can be accurately positioned through the cooperation between the left locating part, the middle locating part, the right locating part and the locating shaft and the shaft sleeve.

[0004] During the production process of the hook arm truck, the end of the hook arm needs to be welded to the hook component. However, the existing technology is not convenient for pre-treating the hook end of the hook arm during use, resulting in rust on the surface of the hook end of the hook arm affecting the welding quality.

[0005] In summary, the prior art lacks a technology for pre-treating the hook end of the pull arm to be welded. Summary of the Invention

[0006] The purpose of the present invention is to solve the shortcomings of the background technology and to propose a hook arm welding tool for a hook arm vehicle.

[0007] In order to achieve the above purpose, the technical solution adopted by the present invention is: a hook arm welding tool for a hook arm vehicle, including a tooling seat, a limit seat is fixedly installed on the tooling seat, the inner walls on both sides of the limit seat are rotatably connected to limit rods, and the inner wall of one side of the limit seat is rotatably connected to a booster rod, a guide frame is fixedly connected to the limit seat, a guide column is provided on the guide frame, a fixed seat is fixedly connected to the top of the guide column, a processing grinding disc is rotatably connected below the fixed seat, and a welding edge processing mechanism is slidably provided below the processing grinding disc.

[0008] Preferably, a plurality of rollers are rotatably connected to the tooling seat, a pull arm body is placed on the tooling seat, the lower side of the pull arm body is in sliding contact with the rollers, and the bending part of the pull arm body is adapted to the inner wall of the limit seat.

[0009] Preferably, one end of the limiting rod passes through the inner wall of the limiting seat and extends to the outside and is fixedly connected to the motor A, and a fan-shaped gear disk is fixedly connected to the limiting rod.

[0010] Preferably, both ends of the boost rod are fixedly connected with an L-shaped rod, the L-shaped rod is rotatably connected to the inner wall of the limit seat, one end of the L-shaped rod is rotatably connected to a connecting rod, the other end of the connecting rod is rotatably connected to a moving frame, one end of the moving frame is penetrated and slidably fitted with a reciprocating screw, one end of the reciprocating screw is rotatably connected to the inner wall of the limit seat, the outer wall of the other end of the reciprocating screw is annular in structure and rotatably connected with a plurality of transmission teeth, a tension spring is fixedly connected between the transmission teeth and the inner wall of the end portion of the reciprocating screw, the outer wall of the end portion of the reciprocating screw is rotatably connected to a transmission wheel, the inner wall of the transmission wheel is provided with a plurality of tooth grooves, and the tooth grooves are meshed with the transmission teeth for transmission.

[0011] Preferably, an electric push rod is rotatably connected to the bottom end of the guide column, and the other end of the electric push rod is fixedly connected to the guide frame. A changing groove is provided on the outer wall of the guide column, and a protrusion is fixedly connected to the inner wall of the top end of the guide frame. The outer wall of the protrusion is slidably fitted with the inner wall of the changing groove.

[0012] Preferably, the top of the processing grinding disc passes through the fixed seat and is fixedly connected to the motor B, the bottom surface of the processing grinding disc is frictionally contacted with the welding end of the pulling arm body, the inner wall of the processing grinding disc is rotatably connected with multiple universal joints, the top of the universal joint passes through the inner wall of the processing grinding disc and is fixedly connected with a driving wheel, the bottom end of the universal joint is fixedly connected with a key shaft, and the key shaft is rotatably connected to the inner wall of the processing grinding disc.

[0013] Preferably, an annular rack A is fixedly connected to the inner wall of the fixing seat, and the annular rack A is meshed with the driving wheel for transmission.

[0014] Preferably, the welding edge processing mechanism includes a slider, which is slidingly matched with the inner wall of the processing grinding disc, and a movable rod is fixedly connected to one end of the slider, and the movable rod is slidingly matched with the inner wall of the processing grinding disc, and a spring is fixedly connected between the movable rod and the inner wall of the processing grinding disc, and a transmission sleeve is rotatably connected to the slider, and the inner wall of the transmission sleeve is slidingly matched with the outer wall of the key shaft, and the outer wall of the transmission sleeve is fixedly connected to a driven wheel.

[0015] Preferably, a conical grinding head is rotatably connected to the bottom end of the slider, the outer wall of the conical grinding head is in frictional contact with the side of the welding end of the pull arm body, and an annular rack B is fixedly connected to the conical grinding head, and the annular rack B is meshed with the driven wheel for transmission.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] 1. By setting up a processing grinding disc and a welding edge processing mechanism, the welding end of the pull arm can be pre-treated before welding the hook, effectively removing rust, which can not only improve welding quality and reduce defects, but also improve production efficiency, extend the service life of components, and improve the stability and reliability of welding operations. In addition, the processing grinding disc and the welding edge processing mechanism can preheat the welding end of the pull arm through friction to reduce cracks caused by thermal stress during welding, thereby comprehensively improving the overall effect of the hook arm welding process;

[0018] 2. By setting the limit seat and limit rod, the L-shaped pull arm can be effectively limited and clamping limit can be avoided. The pull arm welding tooling of the hook arm vehicle can provide higher positioning accuracy, reduce the impact of the clamping force on the workpiece, improve production efficiency, ensure the stability of the workpiece, and optimize the durability of the tooling, greatly improving the shortcomings of traditional clamping limit, improving welding quality and the overall efficiency of the production process;

[0019] 3. By setting up the booster rod and roller, the removal and positioning process of the arm body becomes more efficient, precise and stable, which not only improves production efficiency, but also reduces workpiece damage and human error, while improving the adaptability and safety of the tooling. In addition, the simplified operation and maintenance process also makes the tooling easier to use, reducing failures and maintenance costs in long-term use. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic diagram of the overall structure of a hook arm welding tooling of a hook arm vehicle before welding;

[0021] Figure 2 This is a partial cross-sectional schematic diagram of the overall structure of the hook arm welding tooling of the hook arm vehicle after welding;

[0022] Figure 3 This is a schematic diagram of the expanded structure of a tooling seat and other structures of a hook arm welding tooling of a hook arm vehicle of the present invention;

[0023] Figure 4 This is a schematic structural diagram of a limit rod and a booster rod of a hook arm welding tooling of a hook arm vehicle according to the present invention;

[0024] Figure 5 The invention relates to a hook arm vehicle pulling arm welding tool Figure 4 A schematic diagram of the structure at center A;

[0025] Figure 6 This is a partial cross-sectional expanded schematic diagram of the guide frame and guide column structure of the hook arm welding tooling of the hook arm vehicle of the present invention;

[0026] Figure 7 This is a partial cross-sectional schematic diagram of the structure of a fixed seat and other parts of a hook arm welding tooling of a hook arm vehicle according to the present invention;

[0027] Figure 8 The present invention provides a partial cross-sectional expansion schematic diagram of the processing grinding wheel and weld edge processing mechanism structure of the hook arm welding tooling of the hook arm vehicle.

[0028] The following are marked in the figure: 1. Fixture seat; 2. Limit seat; 3. Limit rod; 4. Boost rod; 5. Guide frame; 6. Guide column; 7. Fixed seat; 8. Processing grinding disc; 9. Welding edge processing mechanism; 101. Roller; 102. Pull arm body; 301. Motor A; 302. Sector gear disc; 401. L-shaped rod; 402. Connecting rod; 403. Moving frame; 404. Reciprocating screw; 405. Transmission gear. 406, transmission wheel; 407, tension spring; 601, electric push rod; 602, change-direction groove; 501, raised block; 801, motor B; 802, universal joint; 803, driving wheel; 804, key shaft; 701, ring rack A; 901, slider; 902, movable rod; 903, spring; 904, transmission sleeve; 905, driven wheel; 906, conical grinding head; 907, ring rack B. DETAILED DESCRIPTION

[0029] The following description is intended to disclose the present invention so that those skilled in the art can implement the present invention. The preferred embodiments described below are merely examples, and those skilled in the art may conceive of other obvious variations.

[0030] like Figures 1-8The illustrated drawing arm welding tooling for a hook-arm vehicle comprises a tooling base 1, on which a limit seat 2 is fixedly mounted. A limit rod 3 is rotatably connected to the inner walls of both sides of the limit seat 2. A booster rod 4 is rotatably connected to the inner wall of one side of the limit seat 2. A guide frame 5 is fixedly connected to the limit seat 2, and a guide column 6 is provided on the guide frame 5. A fixed seat 7 is fixedly connected to the top of the guide column 6. A processing grinding disc 8 is rotatably connected below the fixed seat 7. A weld edge processing mechanism 9 is slidably provided below the processing grinding disc 8. The opening of the limit seat 2 is provided with inclined surfaces at both ends to guide the drawing arm body 102 and achieve rapid positioning.

[0031] like Figure 3 As shown, a plurality of rollers 101 are rotatably connected to the tooling seat 1, and a pull arm body 102 is placed on the tooling seat 1. The lower side of the pull arm body 102 is in sliding contact with the rollers 101, and the bending part of the pull arm body 102 is adapted to the inner wall of the limit seat 2.

[0032] like Figure 4 As shown, one end of the limit rod 3 passes through the inner wall of the limit seat 2 and extends to the outside and is fixedly connected to the motor A301. The limit rod 3 is fixedly connected to the fan-shaped toothed disc 302. The motor A301 drives the connected limit rod 3 to rotate in the opposite direction, thereby moving the limit rod 3 away. At the same time, the fan-shaped toothed disc 302 on the limit rod 3 can drive the transmission wheel 406 to rotate.

[0033] like Figure 4 、 Figure 5 As shown, both ends of the boost rod 4 are fixedly connected with an L-shaped rod 401, and the L-shaped rod 401 is rotatably connected to the inner wall of the limit seat 2. One end of the L-shaped rod 401 is rotatably connected to a connecting rod 402, and the other end of the connecting rod 402 is rotatably connected to a moving frame 403. A reciprocating screw rod 404 is slidingly provided at one end of the moving frame 403, and one end of the reciprocating screw rod 404 is rotatably connected to the inner wall of the limit seat 2. The outer wall of the other end of the reciprocating screw rod 404 is annular in structure and rotatably connected to multiple transmission teeth 405. A tension spring 407 is fixedly connected between the transmission teeth 405 and the inner wall of the end of the reciprocating screw rod 404. The outer wall of the end of the reciprocating screw rod 404 is rotatably connected to a transmission wheel 406. The inner wall of the transmission wheel 406 is provided with a plurality of tooth grooves, and the tooth grooves are engaged with the transmission teeth 405 for transmission. The transmission wheel 406 drives the reciprocating screw 404 connected to the transmission teeth 405 through the internal tooth grooves, so that the reciprocating screw 404 drives the moving frame 403 to reciprocate, so that the moving frame 403 can drive the booster rod 4 connected to the L-shaped rod 401 to rotate through the connecting rod 402, so that the booster rod 4 can push the arm body 102. The tension spring 407 realizes the one-way transmission of the transmission teeth 405.

[0034] like Figure 6As shown, the bottom end of the guide column 6 is rotatably connected to an electric push rod 601, the other end of which is fixedly connected to the guide frame 5. The outer wall of the guide column 6 is provided with a direction-changing groove 602, and the inner wall of the top end of the guide frame 5 is fixedly connected to a raised block 501. The outer wall of the raised block 501 slides with the inner wall of the direction-changing groove 602. When the electric push rod 601 is used to drive the connected guide column 6 downward, the direction-changing groove 602 on the guide column 6 slides on the raised block 501, thereby causing the guide column 6 to rotate, causing the processing grinding disc 8 to rotate to above the welded end of the pulling arm body 102.

[0035] like Figure 8 As shown, the top of the processing grinding disc 8 passes through the fixed seat 7 and is fixedly connected to a motor B801. The bottom surface of the processing grinding disc 8 is in frictional contact with the welding end of the arm body 102. The inner wall of the processing grinding disc 8 is rotatably connected to multiple universal joints 802. The top of the universal joint 802 passes through the inner wall of the processing grinding disc 8 and is fixedly connected to a driving wheel 803. The bottom end of the universal joint 802 is fixedly connected to a key shaft 804, which is rotatably connected to the inner wall of the processing grinding disc 8. The motor B801 drives the processing grinding disc 8 to rotate, treating the rust on the end surface of the welding end of the arm body 102. At the same time, it drives the conical grinding head 906 to process the edges and corners of the welding end of the arm body 102. At the same time, under the action of the annular rack A701, the driving wheel 803 is rotated, which then drives the universal joint 802 to rotate, so that the universal joint 802 can drive the key shaft 804 to rotate.

[0036] like Figure 7 As shown, an annular rack A701 is fixedly connected to the inner wall of the fixing seat 7, and the annular rack A701 is meshed with the driving wheel 803 for transmission.

[0037] like Figure 8 As shown, the weld edge processing mechanism 9 includes a slider 901, which is slidably engaged with the inner wall of the processing grinding disc 8. A movable rod 902 is fixedly connected to one end of the slider 901. The movable rod 902 is slidably engaged with the inner wall of the processing grinding disc 8. A spring 903 is fixedly connected between the movable rod 902 and the inner wall of the processing grinding disc 8. A transmission sleeve 904 is rotatably connected to the slider 901. The inner wall of the transmission sleeve 904 is slidably engaged with the outer wall of the key shaft 804. A driven wheel 905 is fixedly connected to the outer wall of the transmission sleeve 904. The key shaft 804 can drive the driven wheel 905 connected to the transmission sleeve 904 to rotate, so that the driven wheel 905 can drive the conical grinding head 906 connected to the annular rack B907 to rotate. The spring 903 ensures that the conical grinding head 906 always maintains contact with the edge corner of the welding end of the pull arm body 102, ensuring that the conical grinding head 906 can move downward smoothly.

[0038] A conical grinding head 906 is rotatably connected to the bottom end of the slider 901, and the outer wall of the conical grinding head 906 is in friction contact with the side of the welding end of the pulling arm body 102. An annular rack B907 is fixedly connected to the conical grinding head 906, and the annular rack B907 is meshed with the driven wheel 905 for transmission.

[0039] By setting up the processing grinding wheel 8 and the welding edge processing mechanism 9, the welding end can be pre-treated before the hook is welded to the welding end of the pulling arm body 102, and rust can be effectively removed, which can not only improve the welding quality and reduce defects, but also improve production efficiency, extend the service life of components, and improve the stability and reliability of welding operations. In addition, it can also reduce environmental pollution and improve the safety of operation, thereby comprehensively improving the overall effect of the hook arm truck pulling arm welding process.

[0040] Working principle: When it is necessary to weld a hook to the welding end of the arm body 102, first place the arm body 102 on the roller 101 and push it so that the bent end of the arm body 102 is inserted into the limit seat 2;

[0041] Then, the motor A301 is used to drive the connected limiting rod 3 to rotate so that the limiting rod 3 can block the inner side of the bent end of the pulling arm body 102 to limit the position of the pulling arm body 102;

[0042] Then, the electric push rod 601 is used to drive the connected guide column 6 to move downward. At this time, the direction-changing groove 602 on the guide column 6 slides on the protruding block 501, thereby rotating the guide column 6, so that the processing grinding disc 8 rotates to the top of the welding end of the pulling arm body 102 and contacts it;

[0043] Then, the motor B801 is used to drive the processing grinding disc 8 to rotate, and the rust on the end surface of the welding end of the arm body 102 is treated. At the same time, the conical grinding head 906 is driven to process the edges and corners of the welding end of the arm body 102. At the same time, under the action of the annular rack A701, the driving wheel 803 is rotated, and then the driving wheel 803 can drive the universal joint 802 to rotate, so that the universal joint 802 can drive the key shaft 804 to rotate;

[0044] Then the key shaft 804 can drive the driven wheel 905 connected to the transmission sleeve 904 to rotate, so that the driven wheel 905 can drive the conical grinding head 906 connected to the ring rack B907 to rotate, further improving the efficiency of treating the rust on the welded end corners of the arm body 102;

[0045] After processing the welding end of the pulling arm body 102, the fixing seat 7 is removed, and the hook component is welded to the pulling arm body 102. After welding is completed, the motor A301 is used to drive the connected limit rod 3 to rotate in the opposite direction, so that the limit rod 3 is moved away. At the same time, the fan-shaped toothed disk 302 on the limit rod 3 can drive the transmission wheel 406 to rotate. At this time, the transmission wheel 406 will drive the reciprocating screw rod 404 connected to the transmission teeth 405 to rotate through the internal tooth groove, so that the reciprocating screw rod 404 drives the moving frame 403 to move back and forth, so that the moving frame 403 can drive the booster rod 4 connected to the L-shaped rod 401 to rotate through the connecting rod 402, so that the booster rod 4 can push the pulling arm body 102 so that it can be quickly removed.

[0046] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus.

[0047] The above shows and describes the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions merely illustrate the principles of the present invention. Various changes and modifications may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and modifications are intended to fall within the scope of the present invention. The scope of protection claimed by the present invention is defined by the appended claims and their equivalents.

Claims

1. A hook arm welding tool for a hook arm vehicle, comprising a tool seat (1), characterized in that: A limit seat (2) is fixedly mounted on the tooling seat (1), and limit rods (3) are rotatably connected to the inner walls of both sides of the limit seat (2), and a booster rod (4) is rotatably connected to the inner wall of one side of the limit seat (2), and a guide frame (5) is fixedly connected to the limit seat (2), and a guide column (6) is provided on the guide frame (5), and a fixed seat (7) is fixedly connected to the top of the guide column (6), and a processing grinding disc (8) is rotatably connected to the bottom of the fixed seat (7), and a welding edge processing mechanism (9) is slidably provided below the processing grinding disc (8).

2. The hook arm welding tool of the hook arm vehicle according to claim 1, characterized in that: A plurality of rollers (101) are rotatably connected to the tooling seat (1), a pull arm body (102) is placed on the tooling seat (1), the lower side of the pull arm body (102) is in sliding contact with the rollers (101), and the bending portion of the pull arm body (102) is adapted to the inner wall of the limit seat (2).

3. The hook arm welding tool of the hook arm vehicle according to claim 2, characterized in that: One end of the limiting rod (3) passes through the inner wall of the limiting seat (2) and extends to the outside and is fixedly connected to a motor A (301). A sector-shaped toothed disc (302) is fixedly connected to the limiting rod (3).

4. The hook arm welding tool of the hook arm vehicle according to claim 3, characterized in that: Both ends of the boost rod (4) are fixedly connected with an L-shaped rod (401), and the L-shaped rod (401) is rotatably connected to the inner wall of the limit seat (2). One end of the L-shaped rod (401) is rotatably connected to a connecting rod (402), and the other end of the connecting rod (402) is rotatably connected to a moving frame (403). One end of the moving frame (403) is penetrated by a reciprocating screw rod (404) that is slidably matched. One end of the reciprocating screw rod (404) is connected to the limit seat (2). The inner wall is rotatably connected, the outer wall of the other end of the reciprocating screw rod (404) is annular in structure and rotatably connected with a plurality of transmission teeth (405), a tension spring (407) is fixedly connected between the transmission teeth (405) and the inner wall of the end of the reciprocating screw rod (404), the outer wall of the end of the reciprocating screw rod (404) is rotatably connected with a transmission wheel (406), the inner wall of the transmission wheel (406) is provided with a plurality of tooth grooves, and the tooth grooves are meshed with the transmission teeth (405) for transmission.

5. The hook arm welding tool of the hook arm vehicle according to claim 4, characterized in that: The bottom end of the guide column (6) is rotatably connected to an electric push rod (601), and the other end of the electric push rod (601) is fixedly connected to the guide frame (5). The outer wall of the guide column (6) is provided with a direction-changing groove (602), and the inner wall of the top end of the guide frame (5) is fixedly connected to a protruding block (501), and the outer wall of the protruding block (501) is slidably matched with the inner wall of the direction-changing groove (602).

6. The hook arm welding tool of the hook arm vehicle according to claim 5, characterized in that: The top of the processing grinding disc (8) passes through the fixed seat (7) and is fixedly connected to a motor B (801), the bottom surface of the processing grinding disc (8) is frictionally contacted with the welding end of the pulling arm body (102), the inner wall of the processing grinding disc (8) is rotatably connected with a plurality of universal joints (802), the top of the universal joint (802) passes through the inner wall of the processing grinding disc (8) and is fixedly connected to a driving wheel (803), the bottom end of the universal joint (802) is fixedly connected to a key shaft (804), and the key shaft (804) is rotatably connected to the inner wall of the processing grinding disc (8).

7. The hook arm welding tool of the hook arm vehicle according to claim 6, characterized in that: An annular rack A (701) is fixedly connected to the inner wall of the fixing seat (7), and the annular rack A (701) is meshed with the driving wheel (803) for transmission.

8. The hook arm welding tool of the hook arm vehicle according to claim 7, characterized in that: The weld edge processing mechanism (9) includes a slider (901), the slider (901) is slidably matched with the inner wall of the processing grinding disc (8), one end of the slider (901) is fixedly connected with a movable rod (902), the movable rod (902) is slidably matched with the inner wall of the processing grinding disc (8), a spring (903) is fixedly connected between the movable rod (902) and the inner wall of the processing grinding disc (8), a transmission sleeve (904) is rotatably connected to the slider (901), the inner wall of the transmission sleeve (904) is slidably matched with the outer wall of the key shaft (804), and the outer wall of the transmission sleeve (904) is fixedly connected with a driven wheel (905).

9. The hook arm welding tool of the hook arm vehicle according to claim 8, characterized in that: The bottom end of the slider (901) is rotatably connected to a conical grinding head (906), the outer wall of the conical grinding head (906) is in frictional contact with the side of the welding end of the pull arm body (102), and the conical grinding head (906) is fixedly connected to an annular rack B (907), and the annular rack B (907) is meshed with the driven wheel (905) for transmission.

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