Sucker type grabbing device for graphite products

Abstract

The invention provides a suction cup type grabbing device for graphite products, and relates to the field of graphite processing. A suction cup type grabbing device for graphite products comprises a suction cup, the top end of the suction cup is connected with and penetrates through a communicating pipe, the top end of the communicating pipe is connected with and penetrates through an electromagnetic reversing valve, the two input ends of the electromagnetic reversing valve are connected with and penetrate through an exhaust pipe and an air suction pipe respectively, and the exhaust pipe and the air suction pipe are alternately communicated with the communicating pipe. And an inverted boss type spacer is arranged in the communicating pipe. According to the suction cup type grabbing device for the graphite product, the exhaust pipe is communicated with the communicating pipe under the control of the electromagnetic reversing valve, and gas is concentrated through the spacer and exhausted through the vent hole in the exhaust process, so that dust on the adsorption surface of graphite can be blown away, and the suction cup is attached to the graphite; an air suction pipe is switched through an electromagnetic reversing valve, so that the suction cup and the graphite can be temporarily fixed through air suction, and the situation that the graphite powder is sucked into a pipeline in the working process of the suction cup can be avoided through the arrangement.

Description

Technical Field

[0001] The invention relates to the field of graphite processing, in particular to a suction cup type grabbing device for graphite products. Background Art

[0002] Using a suction cup to grab graphite products is a commonly used technical means in the prior art. For example, the existing patent (CN207759688U) discloses a graphite suction cup, including a suction cup, a suction nozzle, an air pipe, a vacuum device and a handle. The front end surface of the suction cup is evenly provided with a number of suction nozzles, and the handle is provided on the rear end surface of the suction cup. The suction nozzle is connected to the air pipe, and the air pipe passes through the suction cup and the handle to connect the vacuum device. A three-way valve is provided on the air pipe in the handle, and the two ends of the three-way valve are connected to the air pipe, and the other end of the three-way valve is connected to the external air. The three-way valve includes a three-way valve knob, and the three-way valve knob is provided on one side of the handle. This technical solution can not only stably and conveniently take and place graphite blocks, but also use a retractable positioning device for positioning without affecting the processing of the graphite block surface directly on the graphite suction cup. However, there is dust on the surface of the graphite after processing, and the dust will be sucked into the pipeline during the suction process of the suction cup.

[0003] The existing patent (CN102431787A) discloses a method for removing debris from a vacuum suction cup. An air pump and a two-position three-way valve are added to the air circuit. The vacuum suction cup adds a step of blowing to remove debris between two consecutive adsorptions of the workpiece, so that the vacuum circuit is always kept clean, preventing the vacuum pipeline from being blocked by debris, ensuring the strength of the vacuum suction cup's adsorption force under long-term working conditions, and improving the reliability of equipment operation. There is almost no need to remove the filter for cleaning, reducing the frequency of shutdown maintenance and improving production efficiency.

[0004] This technical solution has a simple structure and low cost, and is very easy to modify even existing equipment. However, the outlet diameter of the pipeline used in the method of this technical solution is large and the air pressure is not concentrated during the air blowing process, so a new suction cup clamping device is needed. Summary of the invention

[0005] In view of the deficiencies in the prior art, the present invention provides a suction cup grabbing device for graphite products, which solves the problems raised in the above background technology.

[0006] To achieve the above objectives, the present invention is implemented through the following technical solutions: a suction cup type grasping device for graphite products, comprising a suction cup, the top end of the suction cup is connected to and penetrated by a connecting pipe, the top end of the connecting pipe is connected to and penetrated by an electromagnetic reversing valve, the two input ends of the electromagnetic reversing valve are respectively connected to and penetrated by an exhaust pipe and an intake pipe, the exhaust pipe and the intake pipe are alternately penetrated by the connecting pipe, the interior of the connecting pipe is provided with an inverted boss type spacer, and a vent hole is opened in the middle of the spacer.

[0007] Preferably, a sleeve is arranged between the connecting tube and the suction cup, a step ring is provided above the inner ring of the sleeve, an inner upper thread groove is provided on the inner wall of the step ring, an inner lower thread groove is provided inside the sleeve below the step ring, the suction cup is threadedly connected to the inner lower thread groove, an outer thread groove is provided above the outer surface of the sleeve, the connecting tube is threadedly connected to the outer thread groove, a spacer is placed inside the step ring, the inner thread of the inner upper thread groove is connected to the inner thread ring, and the inner thread ring is located above the spacer.

[0008] Preferably, a sealing sleeve is provided at the top of the sleeve, and a lower threaded tube is connected and penetrated by the sealing sleeve below, the lower threaded tube is threadedly connected to the external threaded groove, the upper part of the sealing sleeve is connected and penetrated by the upper threaded tube, the upper threaded tube is threadedly connected to the connecting tube, and a filter element is provided between the upper threaded tube and the connecting tube, and the inner sliding connection of the sealing sleeve is provided with a baffle for covering the connecting hole between the lower threaded tube and the sealing sleeve, a pneumatic telescopic sleeve is fixedly installed on one side of the baffle, a two-position three-way solenoid valve is connected to the middle of the exhaust pipe, one output end of the two-position three-way solenoid valve is connected and penetrated by the electromagnetic reversing valve, and the other output end of the two-position three-way solenoid valve is connected and penetrated by the pneumatic telescopic sleeve, and the pneumatic telescopic sleeve is provided with an exhaust hole, and a dust exhaust port is opened on the side of the sealing sleeve away from the pneumatic telescopic sleeve, and a sealing plate covering the dust exhaust port is fixedly installed on the baffle, and a support plate is fixedly installed on the sealing sleeve below the dust exhaust port, and the support plate and the sealing plate are fixedly connected by a reset spring.

[0009] Preferably, a positioning block is fixedly mounted on the inner wall of the sealing sleeve, and a protrusion is provided on the side of the baffle plate close to the pneumatic telescopic sleeve, and the protrusion contacts the positioning block when the telescopic sleeve is unfolded.

[0010] Preferably, the sealing sleeve is divided into two parts, an upper part and an lower part, a dividing line between the two parts is flush with the upper surface of the protrusion, and the upper part and the lower part are connected by ultrasonic welding.

[0011] Preferably, a positioning suction point has a plurality of the suction cups, a diverter is fixedly mounted on the bottom end of the connecting tube, and the suction cup is connected to and communicates with the diverter.

[0012] Preferably, a diverter ring is fixedly mounted on the outer surface of the diverter, the diverter ring is connected to an outlet of a two-position three-way solenoid valve, and a conduit is connected to and penetrates the air inlet end of the pneumatic telescopic sleeve, and the conduit is connected to and penetrates the diverter ring.

[0013] Preferably, a retaining ring is provided at the upper end of the spacer, the retaining ring is placed inside the step ring, and a through hole with a lower diameter larger than an upper diameter is opened on the surface of the spacer.

[0014] Preferably, a bracket is fixedly mounted on the outer surface of the connecting pipe, and the brackets at multiple positioning points are fixedly connected by a connecting rod with adjustable length, and a flange for connecting a mechanical arm is provided in the middle of the connecting rod.

[0015] Compared with the prior art, the present invention has the following beneficial effects: The suction cup type gripping device for graphite products is controlled by an electromagnetic reversing valve to connect an exhaust pipe with a connecting pipe. During the exhaust process, the gas is concentrated by a diaphragm and discharged through a vent hole, so that dust on the graphite adsorption surface can be blown away, and the suction cup is attached to the graphite. Then, the suction pipe is switched by the electromagnetic reversing valve to allow air to be sucked so that the suction cup can be temporarily fixed to the graphite. This arrangement can prevent graphite powder from being sucked into the pipeline during the operation of the suction cup.

[0016] The suction cup type gripping device for graphite products has a baffle ring disposed at the upper end of the spacer, the baffle ring being placed inside the step ring, and a through hole with a lower diameter larger than an upper diameter being opened on the surface of the spacer. This arrangement allows the airflow to be concentrated and discharged from the middle during exhaust, and the airway to be kept connected during intake.

[0017] The suction cup type gripping device for graphite products first switches to driving the pneumatic telescopic sleeve through the two-position three-way solenoid valve before the next dust blowing action. The pneumatic telescopic sleeve is expanded to squeeze the baffle, so that the airway connected to the suction cup is closed and the dust discharge port is opened. At this time, the electromagnetic reversing valve and the two-position three-way solenoid valve are connected to the exhaust pipe to back-blow the filter element through the exhaust pipe. During the back-blow, the fallen dust is discharged through the dust discharge port to prevent the graphite dust from being blown back to the suction cup.

[0018] The suction cup grabbing device for graphite products has a bracket fixedly installed on the outer surface of the connecting pipe, and the brackets at multiple positioning points are fixedly connected by a connecting rod with adjustable length. A flange for connecting a mechanical arm is provided in the middle of the connecting rod. Such a setting can ensure that the device can adapt to graphite products of different sizes. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the structure of the present invention; Figure 2 This is a schematic diagram of the connection of the diverter of the present invention; Figure 3 This is a schematic diagram of the connection of the suction cup of the present invention; Figure 4 A half-section schematic diagram of a sleeve of the present invention; Figure 5 This is a schematic diagram of the spacer connection of the present invention; Figure 6 A half-section schematic diagram of the sealing sleeve of the present invention; Figure 7 It is a schematic diagram of the lower half of the sealing sleeve of the present invention.

[0020] In the figure: 1. suction cup; 2. connecting pipe; 3. electromagnetic reversing valve; 4. exhaust pipe; 5. suction pipe; 6. spacer; 7. vent; 8. sleeve; 9. step ring; 10. upper inner thread groove; 11. lower inner thread groove; 12. outer thread groove; 13. inner thread ring; 14. sealing sleeve; 15. lower thread pipe; 16. upper thread pipe; 17. filter element; 18. baffle; 19. pneumatic telescopic sleeve; 20. two-position three-way electromagnetic valve; 21. exhaust hole; 22. dust outlet; 23. sealing plate; 24. support plate; 25. reset spring; 26. diverter; 27. diverter ring; 28. conduit; 29. ​​positioning block; 30. protrusion; 31. baffle ring; 32. through hole; 33. bracket; 34. connecting rod; 35. flange. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0022] It should be noted that all directional indications in the embodiments of the present application are only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture. If the specific posture changes, the directional indication will also change accordingly.

[0023] In this application, unless otherwise clearly specified and limited, the terms "connection", "fixation", etc. should be understood in a broad sense. For example, "fixation" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0024] In addition, in this application, descriptions such as "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in this field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by this application.

[0025] like Figure 1-7 As shown, a suction cup type grasping device for graphite products includes a suction cup 1, the top of the suction cup 1 is connected to and penetrated by a connecting pipe 2, the top of the connecting pipe 2 is connected to and penetrated by an electromagnetic reversing valve 3, the two input ends of the electromagnetic reversing valve 3 are respectively connected to and penetrated by an exhaust pipe 4 and an intake pipe 5, the exhaust pipe 4 and the intake pipe 5 are alternately penetrated by the connecting pipe 2, the interior of the connecting pipe 2 is provided with an inverted boss type spacer 6, and a vent hole 7 is opened in the middle of the spacer 6.

[0026] A sleeve 8 is arranged between the connecting pipe 2 and the suction cup 1, a step ring 9 is provided above the inner circle of the sleeve 8, an inner upper thread groove 10 is provided on the inner wall of the step ring 9, an inner lower thread groove 11 is provided inside the sleeve 8 below the step ring 9, the suction cup 1 is threadedly connected to the inner lower thread groove 11, an outer thread groove 12 is provided above the outer surface of the sleeve 8, the connecting pipe 2 is threadedly connected to the outer thread groove 12, the spacer 6 is placed inside the step ring 9, the inner upper thread groove 10 is threadedly connected to an inner thread ring 13, the inner thread ring 13 is located above the spacer 6, and such an arrangement enables the spacer 6 to be installed in a position and the spacer 6 can be replaced at the same time.

[0027] A sealing sleeve 14 is provided at the top of the sleeve 8, and a lower threaded tube 15 is connected to and penetrates the bottom of the sealing sleeve 14, and the lower threaded tube 15 is threadedly connected to the external thread groove 12, and an upper threaded tube 16 is connected to and penetrates the top of the sealing sleeve 14, and the upper threaded tube 16 is threadedly connected to the connecting tube 2, and a filter element 17 is provided between the upper threaded tube 16 and the connecting tube 2. A baffle 18 for covering the through hole connecting the lower threaded tube 15 and the sealing sleeve 14 is slidably connected inside the sealing sleeve 14. The technical solution adopted in the drawings of the specification is that the sealing sleeve 14 and the baffle 18 are both provided with staggered through grooves. When the through groove interval of the baffle 18 moves to the through groove of the sealing sleeve 14, a seal is formed at this time. Such a setting can reduce the moving range of the baffle 18, and the baffle 18 can also be used to directly cover the airway. This Such a setting structure is simple, with a pneumatic telescopic sleeve 19 fixedly installed on one side, a two-position three-way solenoid valve 20 connected to the middle of the exhaust pipe 4, one output end of the two-position three-way solenoid valve 20 is connected to and communicated with the electromagnetic reversing valve 3, and the other output end of the two-position three-way solenoid valve 20 is connected to and communicated with the pneumatic telescopic sleeve 19, and the pneumatic telescopic sleeve 19 is provided with an exhaust hole 21, and a dust exhaust port 22 is opened on the side of the sealing sleeve 14 away from the pneumatic telescopic sleeve 19, and a sealing plate 23 covering the dust exhaust port 22 is fixedly installed on the baffle 18, and a support plate 24 is fixedly installed on the sealing sleeve 14 below the dust exhaust port 22, and the support plate 24 and the sealing plate 23 are fixedly connected by a reset spring 25. Through such a setting, the backblowing of the filter element 17 can be achieved by switching the pipeline.

[0028] A positioning block 29 is fixedly mounted on the inner wall of the sealing sleeve 14, and a protrusion 30 is provided on the side of the baffle 18 close to the pneumatic telescopic sleeve 19. The protrusion 30 contacts the positioning block 29 when the telescopic sleeve 8 is unfolded. This arrangement can limit the movement range of the baffle 18.

[0029] The sealing sleeve 14 is divided into two parts, the dividing line between the upper and lower parts is flush with the upper surface of the protrusion 30, and the upper and lower parts are connected by ultrasonic welding. By dividing the sealing sleeve 14 into two parts, it is convenient to install the internal device, and then ultrasonic welding is performed after the installation is completed to ensure that there is no air leakage.

[0030] A positioning suction point has multiple suction cups 1, and a diverter 26 is fixedly installed at the bottom end of the connecting tube 2. The suction cup 1 is connected and connected to the diverter 26. This arrangement can avoid using one suction cup 1 to adsorb one positioning suction point. When a gap appears between the suction cup 1 and the graphite, it is easy to fail. By setting up multiple suction cups, a backup effect is played.

[0031] A diverter ring 27 is fixedly installed on the outer surface of the diverter 26, and the diverter ring 27 is connected to an outlet of the two-position three-way solenoid valve 20. The air inlet end of the pneumatic telescopic sleeve 19 is connected to and penetrated by a conduit 28, and the conduit 28 is connected to and penetrated by the diverter ring 27. Through such an arrangement, it is convenient to clean each filter element 17.

[0032] A baffle ring 31 is provided at the upper end of the diaphragm 6, and the baffle ring 31 is placed inside the step ring 9. A through hole 32 with a lower diameter larger than an upper diameter is opened on the surface of the diaphragm 6. Through such an arrangement, the airflow can be concentrated and discharged from the middle during exhaust, and the airway can be kept connected during inhalation.

[0033] A bracket 33 is fixedly installed on the outer surface of the connecting pipe 2. The brackets 33 at multiple positioning points are fixedly connected by a connecting rod 34 with adjustable length. A flange 35 for connecting to a robotic arm is provided in the middle of the connecting rod 34. Such a setting can ensure that the device can adapt to graphite products of different sizes.

[0034] During use, since graphite processing generates powder, the exhaust pipe 4 is connected to the connecting pipe 2 through the control of the electromagnetic reversing valve 3. During the exhaust process, the gas is concentrated through the diaphragm 6 and discharged through the vent hole 7, so that the dust on the graphite adsorption surface can be blown away, and the suction cup 1 is attached to the graphite. Then, the suction pipe 5 is switched by the electromagnetic reversing valve 3 to allow the suction cup 1 to be temporarily fixed to the graphite through suction. This setting can prevent the graphite powder from being sucked into the pipeline during the operation of the suction cup 1. The filter element 17 is arranged in the pipeline so that the graphite powder that is not blown away can be adsorbed on the surface of the filter element 17 during the suction process, thereby preventing the graphite powder from being sucked into the pipeline during the operation of the suction cup 1; Since the graphite dust attached to the filter element 17 will be blown into the suction cup 1 during the next blowing process, the baffle 18 and the dust discharge port 22 are provided. Before the next dust blowing action is performed, the two-position three-way solenoid valve 20 is first switched to drive the pneumatic telescopic sleeve 19 to work. The pneumatic telescopic sleeve 19 is unfolded to squeeze the baffle 18, so that the airway connected to the suction cup 1 is closed and the dust discharge port 22 is opened. At this time, the electromagnetic reversing valve 3 and the two-position three-way solenoid valve 20 are both connected to the exhaust pipe 4 to back-blow the filter element 17 through the exhaust pipe 4. During the back-blow, the fallen dust is discharged through the dust discharge port 22. Since the pneumatic telescopic sleeve 19 is provided with an exhaust hole 21 , the diameter of the exhaust hole 21 is small and the exhaust speed is slow. When the air supply to the pneumatic telescopic sleeve 19 is switched to no air, the pneumatic telescopic sleeve 19 is slowly exhausted under the action of the return spring 25 to complete the back-blowing dust removal.

[0035] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification.

[0036] In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the fact that they can be implemented by ordinary technicians in this field. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by this application.

[0037] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A suction cup gripping device for graphite products, comprising a suction cup (1), characterized in that: The top end of the suction cup (1) is connected to and penetrates a connecting pipe (2), the top end of the connecting pipe (2) is connected to and penetrates an electromagnetic reversing valve (3), two input ends of the electromagnetic reversing valve (3) are respectively connected to and penetrate an exhaust pipe (4) and an intake pipe (5), and the exhaust pipe (4) and the intake pipe (5) are alternately penetrated with the connecting pipe (2); An inverted boss-shaped spacer (6) is provided inside the connecting pipe (2), and a vent hole (7) is provided in the middle of the spacer (6).

2. A suction cup grabbing device for graphite products according to claim 1, characterized in that: A sleeve (8) is arranged between the connecting pipe (2) and the suction cup (1), a step ring (9) is provided above the inner ring of the sleeve (8), an inner upper thread groove (10) is provided on the inner wall of the step ring (9), an inner lower thread groove (11) is provided inside the sleeve (8) and located below the step ring (9), the suction cup (1) is threadedly connected to the inner lower thread groove (11), an outer thread groove (12) is provided above the outer surface of the sleeve (8), the connecting pipe (2) is threadedly connected to the outer thread groove (12), a spacer (6) is placed inside the step ring (9), an inner thread ring (13) is threadedly connected to the inner upper thread groove (10), and the inner thread ring (13) is located above the spacer (6).

3. A suction cup grabbing device for graphite products according to claim 2, characterized in that: A sealing sleeve (14) is provided at the top end of the sleeve (8); a lower threaded tube (15) is connected to and penetrates the lower end of the sealing sleeve (14); the lower threaded tube (15) is threadedly connected to the external thread groove (12); an upper threaded tube (16) is connected to and penetrates the upper end of the sealing sleeve (14); the upper threaded tube (16) is threadedly connected to the connecting tube (2); a filter element (17) is provided between the upper threaded tube (16) and the connecting tube (2); The sealing sleeve (14) is slidably connected to the interior thereof with a baffle (18) for covering the through hole connecting the lower threaded tube (15) and the sealing sleeve (14); a pneumatic telescopic sleeve (19) is fixedly mounted on one side of the baffle (18); a two-position three-way solenoid valve (20) is connected to the middle of the exhaust pipe (4); one output end of the two-position three-way solenoid valve (20) is connected to and communicates with the solenoid reversing valve (3); the other output end of the two-position three-way solenoid valve (20) is connected to and communicates with the pneumatic telescopic sleeve (19); and the pneumatic telescopic sleeve (19) is provided with an exhaust hole (21); A dust discharge port (22) is formed on a side of the sealing sleeve (14) away from the pneumatic telescopic sleeve (19); a sealing plate (23) covering the dust discharge port (22) is fixedly mounted on the baffle plate (18); a support plate (24) is fixedly mounted on the sealing sleeve (14) below the dust discharge port (22); the support plate (24) and the sealing plate (23) are fixedly connected via a return spring (25).

4. A suction cup grabbing device for graphite products according to claim 3, characterized in that: A positioning block (29) is fixedly mounted on the inner wall of the sealing sleeve (14), and a protrusion (30) is provided on the side of the baffle (18) close to the pneumatic telescopic sleeve (19), wherein the protrusion (30) contacts the positioning block when the telescopic sleeve (8) is expanded.

5. The suction cup grabbing device for graphite products according to claim 3, characterized in that: The sealing sleeve (14) is divided into an upper and a lower part, the boundary line between the upper and lower parts is flush with the upper surface of the protrusion (30), and the upper and lower parts are connected by ultrasonic welding.

6. A suction cup grabbing device for graphite products according to claims 1-5, characterized in that: A positioning suction point has a plurality of suction cups (1), a flow divider (26) is fixedly mounted on the bottom end of the connecting pipe (2), and the suction cup (1) is connected to and communicates with the flow divider (26).

7. A suction cup grabbing device for graphite products according to claim 6, characterized in that: A diverter ring (27) is fixedly mounted on the outer surface of the diverter (26), the diverter ring (27) is connected to an outlet of a two-position three-way solenoid valve (20), and a conduit (28) is connected to and penetrates the air inlet end of the pneumatic telescopic sleeve (19), and the conduit (28) is connected to and penetrates the diverter ring (27).

8. A suction cup grabbing device for graphite products according to claim 6, characterized in that: A retaining ring (31) is provided at the upper end of the spacer (6), and the retaining ring (31) is placed inside the step ring (9). A through hole (32) having a lower diameter greater than an upper diameter is provided on the surface of the spacer (6).

9. A suction cup grabbing device for graphite products according to claim 1 or 8, characterized in that: A bracket (33) is fixedly mounted on the outer surface of the connecting pipe (2); the brackets (33) at multiple positioning points are fixedly connected via a connecting rod (34) whose length can be adjusted; a flange (35) for connecting to a mechanical arm is provided in the middle of the connecting rod (34).

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